/* roulang page: index */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 88px;
            --section-spacing-mobile: 52px;
            --header-height: 68px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.4;
            color: var(--text-dark);
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        h1 {
            font-size: clamp(1.8rem, 4vw, 2.75rem);
            line-height: 1.25;
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: clamp(1.5rem, 3vw, 2rem);
            line-height: 1.3;
            letter-spacing: -0.005em;
        }

        h3 {
            font-size: clamp(1.15rem, 2vw, 1.35rem);
            line-height: 1.4;
        }

        p {
            margin-bottom: 0;
            color: var(--text-body);
            line-height: 1.9;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-spacing-desktop) 0;
        }

        .section--gray {
            background-color: var(--secondary-bg);
        }

        .section--cool {
            background-color: var(--cool-gray);
        }

        .section--white {
            background-color: var(--white);
        }

        .section--primary-light {
            background-color: var(--primary-super-light);
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.8rem;
        }

        .section-header h2 {
            margin-bottom: 0.6rem;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }

        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 800;
            letter-spacing: -0.02em;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-desktop li a {
            display: block;
            padding: 8px 13px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .nav-desktop li a:hover {
            color: var(--primary);
            background-color: var(--primary-light);
            text-decoration: none;
        }

        .nav-desktop li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }

        .nav-desktop li a .nav-badge {
            font-size: 0.65rem;
            background: var(--accent);
            color: #fff;
            padding: 1px 6px;
            border-radius: var(--radius-full);
            margin-left: 3px;
            vertical-align: super;
            font-weight: 700;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: var(--cool-gray);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: background var(--transition-fast);
        }

        .nav-toggle:hover {
            background: var(--secondary-bg);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .nav-mobile {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            padding: 12px 20px 20px;
            z-index: 99;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
        }

        .nav-mobile.open {
            display: block;
        }

        .nav-mobile ul {
            list-style: none;
        }

        .nav-mobile li a {
            display: block;
            padding: 13px 16px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            border-radius: var(--radius-sm);
            border-bottom: 1px solid var(--cool-gray);
            transition: all var(--transition-fast);
            text-decoration: none;
        }

        .nav-mobile li a:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-mobile li a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
        }

        .breadcrumb-row {
            background: var(--cool-gray);
            border-bottom: 1px solid var(--border-light);
            padding: 10px 0;
            font-size: 0.85rem;
            color: var(--text-light);
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }

        .breadcrumb-row .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }

        .breadcrumb-row a {
            color: var(--text-light);
            font-weight: 500;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .breadcrumb-row a:hover {
            color: var(--primary);
        }

        .breadcrumb-row .separator {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .breadcrumb-row .back-link {
            margin-left: auto;
            color: var(--primary);
            font-weight: 600;
            text-decoration: none;
            flex-shrink: 0;
        }

        .breadcrumb-row .back-link:hover {
            color: var(--primary-dark);
        }

        /* ========== Hero Bento ========== */
        .hero-bento {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(180deg, var(--primary-super-light) 0%, #FFFFFF 100%);
            overflow: hidden;
        }

        .hero-bento::before {
            content: '';
            position: absolute;
            top: -120px;
            right: -120px;
            width: 460px;
            height: 460px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(46, 91, 255, 0.07) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-bento::after {
            content: '';
            position: absolute;
            bottom: -160px;
            left: -80px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(14, 147, 132, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-bento .container {
            position: relative;
            z-index: 2;
        }

        .hero-bento-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
            align-items: stretch;
        }

        .hero-bento-main {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .hero-bento-main::after {
            content: '';
            position: absolute;
            bottom: -60px;
            right: -40px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: var(--primary-light);
            opacity: 0.5;
            pointer-events: none;
        }

        .hero-bento-main h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.65rem);
            margin-bottom: 1rem;
            position: relative;
            z-index: 2;
        }

        .hero-bento-main h1 .highlight {
            color: var(--primary);
            position: relative;
            display: inline-block;
        }

        .hero-bento-main h1 .highlight::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 2px;
            width: 100%;
            height: 10px;
            background: var(--primary-light);
            border-radius: 4px;
            z-index: -1;
        }

        .hero-bento-main .hero-desc {
            font-size: 1.02rem;
            color: var(--text-light);
            line-height: 1.85;
            margin-bottom: 1.6rem;
            position: relative;
            z-index: 2;
            max-width: 540px;
        }

        .hero-cta-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .hero-bento-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .hero-bento-mini {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 22px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            transition: all var(--transition-base);
        }

        .hero-bento-mini:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .hero-bento-mini .mini-text {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-dark);
        }

        .hero-bento-mini .mini-sub {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 2px;
        }

        .hero-bento-mini .mini-icon {
            width: 46px;
            height: 46px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            flex-shrink: 0;
        }

        .hero-bento-mini.mini-accent .mini-icon {
            background: var(--accent-soft);
            color: var(--accent);
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
            line-height: 1.2;
            border: 2px solid transparent;
            letter-spacing: 0.01em;
        }

        .btn:hover {
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn:active {
            transform: translateY(0);
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(46, 91, 255, 0.28);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 20px rgba(46, 91, 255, 0.35);
        }

        .btn-secondary {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary-light);
        }

        .btn-secondary:hover {
            background: #D8E2FF;
            border-color: #D8E2FF;
            color: var(--primary-dark);
        }

        .btn-accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 14px rgba(14, 147, 132, 0.25);
        }

        .btn-accent:hover {
            background: #0B7A6E;
            border-color: #0B7A6E;
            color: #fff;
            box-shadow: 0 6px 20px rgba(14, 147, 132, 0.35);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 0.85rem;
        }

        .btn-lg {
            padding: 15px 32px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn-full {
            width: 100%;
        }

        /* ========== Cards ========== */
        .card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            overflow: hidden;
        }

        .card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .card-body {
            padding: 20px 22px;
        }

        .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .card-text {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
        }

        .card-image {
            width: 100%;
            height: 180px;
            object-fit: cover;
            background: var(--secondary-bg);
        }

        .card-image-placeholder {
            width: 100%;
            height: 180px;
            background: var(--secondary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            letter-spacing: 0.04em;
        }

        /* ========== Badge ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 10px;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: var(--radius-full);
            line-height: 1.2;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .badge-blue {
            background: var(--primary-light);
            color: var(--primary);
        }

        .badge-accent {
            background: var(--accent-soft);
            color: var(--accent);
        }

        .badge-amber {
            background: #FDF3E0;
            color: var(--amber);
        }

        .badge-gray {
            background: var(--cool-gray);
            color: var(--text-light);
        }

        /* ========== Metric Cards ========== */
        .metric-card {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 24px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .metric-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-3px);
        }

        .metric-card .metric-icon {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .metric-card .metric-value {
            font-family: var(--font-mono);
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.02em;
            line-height: 1.1;
            margin-bottom: 6px;
        }

        .metric-card .metric-label {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-body);
            margin-bottom: 4px;
        }

        .metric-card .metric-desc {
            font-size: 0.82rem;
            color: var(--text-light);
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .metric-card .metric-trend {
            width: 100%;
            height: 6px;
            background: var(--secondary-bg);
            border-radius: var(--radius-full);
            overflow: hidden;
        }

        .metric-card .metric-trend-fill {
            height: 100%;
            border-radius: var(--radius-full);
            transition: width 0.8s ease;
        }

        .fill-blue {
            background: var(--primary);
        }

        .fill-accent {
            background: var(--accent);
        }

        .fill-amber {
            background: var(--amber);
        }

        .fill-gradient {
            background: linear-gradient(90deg, var(--primary), var(--accent));
        }

        /* ========== Service Matrix ========== */
        .service-matrix-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
        }

        .service-matrix-item {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 26px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .service-matrix-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .service-matrix-item.large {
            grid-row: span 2;
            padding: 32px 28px;
        }

        .service-matrix-item .service-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
        }

        .service-matrix-item h3 {
            margin-bottom: 10px;
        }

        .service-matrix-item p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.75;
        }

        .service-matrix-item .service-tag {
            display: inline-block;
            margin-top: 12px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent);
            background: var(--accent-soft);
            padding: 4px 12px;
            border-radius: var(--radius-full);
        }

        /* ========== Result Compare ========== */
        .compare-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            background: #fff;
            margin-bottom: 28px;
        }

        .compare-table th,
        .compare-table td {
            padding: 16px 18px;
            text-align: left;
            font-size: 0.9rem;
            line-height: 1.7;
            border-bottom: 1px solid var(--cool-gray);
        }

        .compare-table th {
            background: var(--cool-gray);
            font-weight: 700;
            color: var(--text-dark);
            font-size: 0.88rem;
            white-space: nowrap;
        }

        .compare-table td:first-child {
            font-weight: 600;
        }

        .compare-table tr:last-child td {
            border-bottom: none;
        }

        .compare-delta {
            color: var(--accent);
            font-weight: 700;
            font-family: var(--font-mono);
        }

        .compare-delta.negative {
            color: var(--amber);
        }

        .compare-analysis {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 30px 28px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            margin-top: 24px;
        }

        .compare-analysis h3 {
            margin-bottom: 16px;
        }

        .compare-analysis p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.9;
            margin-bottom: 12px;
        }

        /* ========== News ========== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .news-item {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 20px 22px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .news-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .news-item .news-date {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--text-muted);
            font-family: var(--font-mono);
        }

        .news-item h3 {
            font-size: 1rem;
            margin-bottom: 0;
        }

        .news-item .news-summary {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        .news-item .read-more {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            text-decoration: none;
            transition: all var(--transition-fast);
            align-self: flex-start;
        }

        .news-item .read-more:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--border);
            box-shadow: var(--shadow-md);
        }

        .faq-item summary {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-dark);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: all var(--transition-fast);
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary:hover {
            background: var(--cool-gray);
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: transform var(--transition-fast);
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
            background: var(--accent-soft);
            color: var(--accent);
        }

        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.8;
            background: var(--cool-gray);
            border-top: 1px solid var(--border-light);
            padding-top: 16px;
            padding-bottom: 18px;
        }

        /* ========== Form ========== */
        .form-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-group label {
            display: block;
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            padding: 12px 14px;
            font-size: 0.95rem;
            border: 1.5px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--white);
            color: var(--text-dark);
            transition: all var(--transition-fast);
            box-shadow: none;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.15);
            outline: none;
        }

        .form-group .form-hint {
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .form-group .checkbox-group {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .form-group .checkbox-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 14px;
            background: var(--cool-gray);
            border-radius: var(--radius-sm);
            border: 1.5px solid transparent;
            cursor: pointer;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-body);
            transition: all var(--transition-fast);
            user-select: none;
        }

        .form-group .checkbox-item:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .form-group .checkbox-item input[type="checkbox"],
        .form-group .checkbox-item input[type="radio"] {
            width: auto;
            cursor: pointer;
            accent-color: var(--primary);
            margin: 0;
        }

        /* ========== Entry Matrix ========== */
        .entry-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .entry-item {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: all var(--transition-base);
            cursor: pointer;
            text-decoration: none;
            display: block;
        }

        .entry-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--primary);
            transform: translateY(-3px);
            text-decoration: none;
        }

        .entry-item .entry-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin: 0 auto 12px;
        }

        .entry-item .entry-label {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .entry-item .entry-sub {
            font-size: 0.78rem;
            color: var(--text-light);
        }

        .entry-item:hover .entry-icon {
            background: var(--primary);
            color: #fff;
        }

        /* ========== Focus Topics ========== */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .topic-card {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            cursor: pointer;
            text-decoration: none;
            display: block;
        }

        .topic-card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            transform: translateY(-3px);
            text-decoration: none;
        }

        .topic-card .topic-image {
            width: 100%;
            height: 160px;
            object-fit: cover;
            background: var(--secondary-bg);
        }

        .topic-card .topic-body {
            padding: 18px 20px;
        }

        .topic-card .topic-title {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-dark);
            margin-bottom: 6px;
            line-height: 1.4;
        }

        .topic-card .topic-desc {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ========== Screenshot Stage ========== */
        .screenshot-stage {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: 36px 30px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

        .screenshot-stage .stage-image {
            width: 100%;
            min-height: 260px;
            background: var(--secondary-bg);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 0.9rem;
            letter-spacing: 0.05em;
            object-fit: cover;
        }

        .screenshot-stage .stage-info h3 {
            margin-bottom: 12px;
        }

        .screenshot-stage .stage-info p {
            font-size: 0.9rem;
            color: var(--text-light);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        /* ========== Campaign ========== */
        .campaign-section {
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .campaign-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            pointer-events: none;
        }

        .campaign-section h2 {
            color: #fff;
            margin-bottom: 10px;
        }

        .campaign-section p {
            color: rgba(255, 255, 255, 0.88);
            font-size: 0.95rem;
            max-width: 600px;
            line-height: 1.8;
        }

        .campaign-section .btn {
            background: #fff;
            color: var(--primary);
            border-color: #fff;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
        }

        .campaign-section .btn:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            border-color: var(--primary-light);
        }

        /* ========== Trust ========== */
        .trust-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .trust-item {
            text-align: center;
            padding: 20px 16px;
        }

        .trust-item .trust-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin: 0 auto 12px;
        }

        .trust-item .trust-title {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .trust-item .trust-desc {
            font-size: 0.8rem;
            color: var(--text-light);
            line-height: 1.65;
        }

        /* ========== Selected Picks ========== */
        .pick-row {
            display: flex;
            gap: 16px;
            align-items: center;
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 16px 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            text-decoration: none;
            margin-bottom: 12px;
        }

        .pick-row:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
            text-decoration: none;
        }

        .pick-row .pick-rank {
            font-family: var(--font-mono);
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            width: 44px;
            text-align: center;
            flex-shrink: 0;
        }

        .pick-row .pick-info {
            flex: 1;
        }

        .pick-row .pick-title {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-dark);
            margin-bottom: 2px;
        }

        .pick-row .pick-desc {
            font-size: 0.82rem;
            color: var(--text-light);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: var(--text-dark);
            color: #D1D5DB;
            padding: 50px 0 0;
            margin-top: 20px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 36px;
            padding-bottom: 36px;
        }

        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .site-footer .footer-brand-desc {
            font-size: 0.85rem;
            color: #9CA3AF;
            line-height: 1.75;
        }

        .site-footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .site-footer ul {
            list-style: none;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul li a {
            color: #9CA3AF;
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer ul li a:hover {
            color: #fff;
            text-decoration: none;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0;
            text-align: center;
            font-size: 0.8rem;
            color: #6B7280;
        }

        .site-footer .footer-bottom a {
            color: #9CA3AF;
            text-decoration: none;
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root {
                --section-spacing-desktop: 64px;
            }

            .nav-desktop {
                gap: 0;
            }

            .nav-desktop li a {
                padding: 8px 9px;
                font-size: 0.8rem;
            }

            .hero-bento-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .hero-bento-side {
                flex-direction: row;
                gap: 14px;
            }

            .hero-bento-mini {
                flex: 1;
            }

            .service-matrix-grid {
                grid-template-columns: 1fr 1fr;
            }

            .service-matrix-item.large {
                grid-column: span 2;
                grid-row: auto;
            }

            .entry-matrix {
                grid-template-columns: repeat(2, 1fr);
            }

            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .screenshot-stage {
                grid-template-columns: 1fr;
            }

            .trust-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-spacing-desktop: 52px;
                --header-height: 60px;
            }

            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .breadcrumb-row {
                font-size: 0.75rem;
                padding: 8px 0;
            }

            .breadcrumb-row .back-link {
                margin-left: auto;
                font-size: 0.75rem;
            }

            .hero-bento {
                padding: 36px 0 24px;
            }

            .hero-bento-main {
                padding: 26px 20px;
            }

            .hero-bento-side {
                flex-direction: column;
            }

            .hero-bento-mini {
                padding: 16px 18px;
            }

            .service-matrix-grid {
                grid-template-columns: 1fr;
            }

            .service-matrix-item.large {
                grid-column: auto;
            }

            .compare-table th,
            .compare-table td {
                padding: 10px 12px;
                font-size: 0.78rem;
            }

            .entry-matrix {
                grid-template-columns: 1fr;
            }

            .topic-grid {
                grid-template-columns: 1fr;
            }

            .campaign-section {
                padding: 28px 20px;
            }

            .trust-grid {
                grid-template-columns: 1fr;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .form-card {
                padding: 24px 18px;
            }

            .section-header {
                margin-bottom: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 14px;
            }

            h1 {
                font-size: 1.6rem;
            }

            h2 {
                font-size: 1.35rem;
            }

            .hero-bento-main {
                padding: 20px 16px;
            }

            .hero-cta-group {
                flex-direction: column;
            }

            .btn {
                width: 100%;
                padding: 11px 18px;
                font-size: 0.9rem;
            }

            .metric-card {
                padding: 18px 16px;
            }

            .metric-card .metric-value {
                font-size: 1.5rem;
            }

            .compare-analysis {
                padding: 20px 16px;
            }

            .faq-item summary {
                padding: 14px 16px;
                font-size: 0.88rem;
            }

            .faq-item .faq-answer {
                padding: 12px 16px 16px;
                font-size: 0.85rem;
            }

            .news-item {
                padding: 16px;
            }
        }

/* roulang page: category2 */
:root {
      --primary: #2E5BFF;
      --primary-dark: #1E3FBF;
      --primary-light: #E8EEFF;
      --primary-super-light: #F5F8FF;
      --secondary-bg: #EFF3F8;
      --cool-gray: #F5F7FA;
      --text-dark: #1F2937;
      --text-body: #374151;
      --text-light: #6B7280;
      --text-muted: #9CA3AF;
      --accent: #0E9384;
      --accent-soft: #E6F5F3;
      --amber: #C8891A;
      --border: #DCDFE6;
      --border-light: #E2E5EA;
      --white: #FFFFFF;
      --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
      --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
      --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
      --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition-fast: 0.2s ease;
      --transition-base: 0.3s ease;
      --transition-slow: 0.45s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
      --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
      --container-max: 1180px;
      --section-spacing-desktop: 64px;
      --section-spacing-mobile: 48px;
      --header-height: 60px;
    }

    html {
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      font-size: 1rem;
      line-height: 1.85;
      color: var(--text-dark);
      background-color: var(--white);
      overflow-x: hidden;
      min-height: 100vh;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    a:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 3px;
      border-radius: 4px;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
      line-height: inherit;
    }

    button {
      cursor: pointer;
      border: none;
      background: none;
      font-family: inherit;
    }

    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 20px;
    }

    .section {
      padding: var(--section-spacing-desktop) 0;
    }

    .section--gray {
      background-color: var(--secondary-bg);
    }

    .section--cool {
      background-color: var(--cool-gray);
    }

    .section--white {
      background-color: var(--white);
    }

    .section--primary-light {
      background-color: var(--primary-super-light);
    }

    .section-header {
      margin-bottom: 2.5rem;
    }

    .section-header .eyebrow {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 0.8rem;
    }

    .section-header h2 {
      margin-bottom: 0.6rem;
      font-size: 1.75rem;
      line-height: 1.4;
      font-weight: 700;
      color: var(--text-dark);
    }

    .section-header .section-desc {
      font-size: 0.98rem;
      color: var(--text-light);
      max-width: 680px;
      line-height: 1.8;
    }

    /* ========== Header & Navigation ========== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      height: var(--header-height);
      display: flex;
      align-items: center;
    }

    .site-header .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-dark);
      white-space: nowrap;
      letter-spacing: -0.02em;
      text-decoration: none;
    }

    .brand-logo:hover {
      color: var(--text-dark);
      text-decoration: none;
    }

    .brand-logo .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
      color: var(--white);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.2rem;
      flex-shrink: 0;
    }

    .nav-desktop {
      display: flex;
      align-items: center;
      gap: 4px;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-desktop li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-body);
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
      white-space: nowrap;
    }

    .nav-desktop li a:hover {
      color: var(--primary);
      background-color: var(--primary-super-light);
      text-decoration: none;
    }

    .nav-desktop li a.active {
      color: var(--primary);
      background-color: var(--primary-light);
      font-weight: 600;
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 6px;
      border-radius: var(--radius-sm);
      transition: background-color var(--transition-fast);
    }

    .nav-toggle:hover {
      background-color: var(--primary-super-light);
    }

    .nav-toggle span {
      width: 24px;
      height: 2px;
      background-color: var(--text-dark);
      border-radius: 2px;
      display: block;
      transition: all var(--transition-base);
    }

    .nav-mobile {
      display: none;
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      background-color: var(--white);
      border-bottom: 1px solid var(--border-light);
      box-shadow: var(--shadow-lg);
      z-index: 99;
      max-height: calc(100vh - var(--header-height));
      overflow-y: auto;
    }

    .nav-mobile ul {
      list-style: none;
      margin: 0;
      padding: 12px 20px;
    }

    .nav-mobile ul li a {
      display: block;
      padding: 12px 8px;
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-body);
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
    }

    .nav-mobile ul li a:hover {
      color: var(--primary);
      background-color: var(--primary-super-light);
      text-decoration: none;
    }

    .nav-mobile ul li a.active {
      color: var(--primary);
      background-color: var(--primary-light);
      font-weight: 600;
    }

    /* ========== Breadcrumb ========== */
    .breadcrumb-wrap {
      background-color: var(--cool-gray);
      border-bottom: 1px solid var(--border-light);
      padding: 14px 0;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 6px;
      flex-wrap: wrap;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .breadcrumb a {
      color: var(--text-light);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .breadcrumb a:hover {
      color: var(--primary);
      text-decoration: underline;
    }

    .breadcrumb .sep {
      color: var(--text-muted);
    }

    .breadcrumb .current {
      color: var(--text-dark);
      font-weight: 600;
    }

    .breadcrumb .back-link {
      margin-left: auto;
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 500;
    }

    .breadcrumb .back-link:hover {
      text-decoration: underline;
    }

    /* ========== Hero ========== */
    .page-hero {
      background-color: var(--white);
      border-bottom: 1px solid var(--border-light);
      padding: 48px 0 40px;
      position: relative;
      overflow: hidden;
    }

    .page-hero::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -80px;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(46, 91, 255, 0.06) 0%, transparent 70%);
      pointer-events: none;
    }

    .page-hero .container {
      position: relative;
    }

    .page-hero h1 {
      font-size: 2.15rem;
      font-weight: 800;
      line-height: 1.35;
      color: var(--text-dark);
      margin-bottom: 14px;
      letter-spacing: -0.02em;
    }

    .page-hero .hero-desc {
      font-size: 1.05rem;
      color: var(--text-light);
      max-width: 760px;
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .hero-meta {
      display: flex;
      align-items: center;
      gap: 18px;
      flex-wrap: wrap;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .hero-meta .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-meta .meta-item i {
      color: var(--primary);
      font-size: 0.9rem;
    }

    /* ========== Main Layout ========== */
    .main-layout {
      display: grid;
      grid-template-columns: 1fr 320px;
      gap: 36px;
      align-items: start;
    }

    @media (max-width: 1024px) {
      .main-layout {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }

    /* ========== List Cards ========== */
    .list-group-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .list-group-title i {
      color: var(--primary);
      font-size: 0.95rem;
    }

    .service-list-item {
      background-color: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      margin-bottom: 16px;
      transition: all var(--transition-base);
      display: block;
      position: relative;
    }

    .service-list-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
      text-decoration: none;
    }

    .service-list-item:hover .item-title {
      color: var(--primary);
    }

    .item-badge-row {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 10px;
    }

    .badge-tag {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      background-color: var(--primary-super-light);
      color: var(--primary);
      letter-spacing: 0.02em;
    }

    .badge-tag.hot {
      background-color: #FFF3E0;
      color: var(--amber);
    }

    .badge-tag.new {
      background-color: var(--accent-soft);
      color: var(--accent);
    }

    .badge-tag.update {
      background-color: #F3E8FF;
      color: #7C3AED;
    }

    .item-rank {
      font-family: var(--font-mono);
      font-weight: 700;
      font-size: 0.85rem;
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .item-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 8px;
      line-height: 1.45;
      transition: color var(--transition-fast);
    }

    .item-desc {
      font-size: 0.92rem;
      color: var(--text-light);
      line-height: 1.75;
      margin-bottom: 12px;
    }

    .item-meta {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .item-meta span {
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    .item-meta i {
      font-size: 0.8rem;
    }

    .item-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      margin-top: 10px;
    }

    .item-link i {
      transition: transform var(--transition-fast);
    }

    .item-link:hover i {
      transform: translateX(4px);
    }

    .item-cover {
      width: 100%;
      height: 160px;
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 14px;
      background-color: var(--cool-gray);
      position: relative;
    }

    .item-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .item-cover .cover-tag {
      position: absolute;
      top: 10px;
      left: 10px;
      background-color: rgba(255, 255, 255, 0.92);
      color: var(--text-dark);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: var(--radius-full);
      backdrop-filter: blur(4px);
    }

    /* ========== Sticky Sidebar ========== */
    .sidebar-widget {
      background-color: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px 22px;
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .sidebar-widget h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .sidebar-widget h3 i {
      color: var(--primary);
      font-size: 0.9rem;
    }

    .sidebar-widget ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .sidebar-widget ul li {
      padding: 8px 0;
      border-bottom: 1px solid var(--border-light);
    }

    .sidebar-widget ul li:last-child {
      border-bottom: none;
    }

    .sidebar-widget ul li a {
      font-size: 0.88rem;
      color: var(--text-body);
      text-decoration: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: color var(--transition-fast);
    }

    .sidebar-widget ul li a:hover {
      color: var(--primary);
      text-decoration: none;
    }

    .sidebar-widget ul li a .count {
      font-family: var(--font-mono);
      font-size: 0.75rem;
      color: var(--text-muted);
      background-color: var(--cool-gray);
      padding: 2px 8px;
      border-radius: var(--radius-full);
    }

    .sidebar-cta {
      background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
      border-radius: var(--radius-md);
      padding: 24px 22px;
      text-align: center;
      color: var(--white);
    }

    .sidebar-cta h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 8px;
    }

    .sidebar-cta p {
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.85);
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .sidebar-cta .btn-white {
      display: inline-block;
      background-color: var(--white);
      color: var(--primary);
      font-weight: 600;
      font-size: 0.88rem;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
    }

    .sidebar-cta .btn-white:hover {
      background-color: var(--primary-light);
      color: var(--primary-dark);
      text-decoration: none;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    /* ========== Depth Content ========== */
    .depth-content {
      background-color: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      line-height: 1.9;
    }

    .depth-content h2 {
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
      line-height: 1.45;
    }

    .depth-content h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-dark);
      margin-top: 24px;
      margin-bottom: 10px;
      line-height: 1.5;
    }

    .depth-content p {
      font-size: 0.95rem;
      color: var(--text-body);
      margin-bottom: 14px;
    }

    .depth-content ul,
    .depth-content ol {
      margin-bottom: 16px;
      padding-left: 20px;
    }

    .depth-content ul li,
    .depth-content ol li {
      font-size: 0.92rem;
      color: var(--text-body);
      margin-bottom: 6px;
    }

    .depth-content blockquote {
      border-left: 3px solid var(--primary);
      padding-left: 18px;
      margin: 18px 0;
      font-size: 0.92rem;
      color: var(--text-light);
      font-style: italic;
    }

    /* ========== FAQ ========== */
    .faq-item {
      background-color: var(--white);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: all var(--transition-base);
    }

    .faq-item:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 16px 20px;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
      background-color: var(--white);
      transition: background-color var(--transition-fast);
    }

    .faq-question:hover {
      background-color: var(--primary-super-light);
    }

    .faq-question .faq-icon {
      flex-shrink: 0;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background-color: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      transition: all var(--transition-fast);
    }

    .faq-item.open .faq-question .faq-icon {
      background-color: var(--primary);
      color: var(--white);
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height var(--transition-slow);
      padding: 0 20px;
      font-size: 0.9rem;
      color: var(--text-body);
      line-height: 1.8;
      background-color: var(--cool-gray);
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 16px 20px;
    }

    /* ========== CTA ========== */
    .cta-section {
      background: linear-gradient(135deg, var(--primary) 0%, #1E3FBF 100%);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      text-align: center;
      color: var(--white);
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -60px;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.08);
      pointer-events: none;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      bottom: -100px;
      left: -50px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.05);
      pointer-events: none;
    }

    .cta-section h2 {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 12px;
      position: relative;
      z-index: 1;
    }

    .cta-section p {
      font-size: 0.98rem;
      color: rgba(255, 255, 255, 0.85);
      max-width: 600px;
      margin: 0 auto 24px;
      line-height: 1.8;
      position: relative;
      z-index: 1;
    }

    .cta-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    .btn-primary-white {
      display: inline-block;
      background-color: var(--white);
      color: var(--primary);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      transition: all var(--transition-fast);
    }

    .btn-primary-white:hover {
      background-color: var(--primary-light);
      color: var(--primary-dark);
      text-decoration: none;
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.2);
    }

    .btn-outline-white {
      display: inline-block;
      background-color: transparent;
      color: var(--white);
      font-weight: 500;
      font-size: 0.95rem;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.5);
      transition: all var(--transition-fast);
    }

    .btn-outline-white:hover {
      background-color: rgba(255, 255, 255, 0.12);
      color: var(--white);
      text-decoration: none;
      border-color: var(--white);
    }

    /* ========== Footer ========== */
    .site-footer {
      background-color: #1F2937;
      color: #D1D5DB;
      padding: 48px 0 28px;
      margin-top: 0;
    }

    .site-footer .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 28px;
    }

    .footer-brand {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--white);
      margin-bottom: 10px;
    }

    .footer-brand-desc {
      font-size: 0.85rem;
      color: #9CA3AF;
      line-height: 1.75;
    }

    .site-footer h4 {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--white);
      margin-bottom: 12px;
      letter-spacing: 0.03em;
    }

    .site-footer ul {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .site-footer ul li {
      margin-bottom: 8px;
    }

    .site-footer ul li a {
      font-size: 0.85rem;
      color: #9CA3AF;
      text-decoration: none;
      transition: color var(--transition-fast);
    }

    .site-footer ul li a:hover {
      color: var(--primary-light);
      text-decoration: none;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      font-size: 0.8rem;
      color: #9CA3AF;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .footer-bottom a {
      color: #9CA3AF;
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: var(--primary-light);
      text-decoration: underline;
    }

    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
      .nav-desktop {
        gap: 2px;
      }
      .nav-desktop li a {
        padding: 8px 10px;
        font-size: 0.85rem;
      }
      .page-hero h1 {
        font-size: 1.8rem;
      }
      .depth-content {
        padding: 28px 24px;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-desktop {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .nav-mobile.open {
        display: block;
      }
      .page-hero {
        padding: 32px 0 28px;
      }
      .page-hero h1 {
        font-size: 1.5rem;
      }
      .page-hero .hero-desc {
        font-size: 0.95rem;
      }
      .main-layout {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .depth-content {
        padding: 22px 18px;
        font-size: 0.9rem;
      }
      .cta-section {
        padding: 32px 20px;
      }
      .cta-section h2 {
        font-size: 1.3rem;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .section {
        padding: var(--section-spacing-mobile) 0;
      }
      .breadcrumb .back-link {
        margin-left: 0;
        width: 100%;
      }
    }

    @media (max-width: 520px) {
      .page-hero h1 {
        font-size: 1.3rem;
      }
      .service-list-item {
        padding: 16px 14px;
      }
      .item-title {
        font-size: 1rem;
      }
      .item-desc {
        font-size: 0.85rem;
      }
      .badge-tag {
        font-size: 0.7rem;
        padding: 2px 8px;
      }
      .depth-content {
        padding: 18px 14px;
      }
      .depth-content h2 {
        font-size: 1.15rem;
      }
      .depth-content h3 {
        font-size: 1rem;
      }
    }

/* roulang page: category3 */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 62px;
            --section-spacing-mobile: 46px;
            --header-height: 66px;
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-spacing-desktop) 0;
        }

        .section--gray {
            background-color: var(--secondary-bg);
        }

        .section--cool {
            background-color: var(--cool-gray);
        }

        .section--white {
            background-color: var(--white);
        }

        .section--primary-light {
            background-color: var(--primary-super-light);
        }

        .section-header {
            margin-bottom: 2.25rem;
        }

        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.7rem;
        }

        .section-header h2 {
            margin-bottom: 0.55rem;
            font-size: 1.85rem;
            line-height: 1.4;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.01em;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 720px;
            line-height: 1.8;
        }

        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }

        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            letter-spacing: -0.02em;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-desktop li {
            margin: 0;
        }

        .nav-desktop li a {
            display: block;
            padding: 8px 16px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: color var(--transition-fast), background-color var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-desktop li a:hover {
            color: var(--primary);
            background-color: var(--primary-super-light);
            text-decoration: none;
        }

        .nav-desktop li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 4px;
            padding: 10px;
            border-radius: var(--radius-sm);
            background-color: var(--primary-light);
            transition: background-color var(--transition-fast);
        }

        .nav-toggle:hover {
            background-color: var(--primary-super-light);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }

        .nav-mobile {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            padding: 16px 20px 24px;
            z-index: 99;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
        }

        .nav-mobile ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .nav-mobile ul li a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: background-color var(--transition-fast), color var(--transition-fast);
        }

        .nav-mobile ul li a:hover {
            background-color: var(--primary-super-light);
            color: var(--primary);
        }

        .nav-mobile ul li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
        }

        .nav-mobile.open {
            display: block;
        }

        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
            margin-top: 0;
        }

        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            flex-wrap: nowrap;
            gap: 8px;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }

        .breadcrumb-bar .container::-webkit-scrollbar {
            display: none;
        }

        .breadcrumb-bar .breadcrumb-item {
            font-size: 0.85rem;
            color: var(--text-light);
            white-space: nowrap;
        }

        .breadcrumb-bar .breadcrumb-item a {
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .breadcrumb-bar .breadcrumb-item a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .breadcrumb-bar .breadcrumb-sep {
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .breadcrumb-bar .breadcrumb-item.current {
            color: var(--primary);
            font-weight: 600;
        }

        .breadcrumb-bar .back-link {
            font-size: 0.85rem;
            color: var(--primary);
            font-weight: 600;
            white-space: nowrap;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }

        .breadcrumb-bar .back-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* Hero */
        .compare-hero {
            background-color: var(--white);
            padding: 3.5rem 0 2.5rem;
        }

        .compare-hero .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
        }

        .compare-hero .hero-text h1 {
            font-size: 2.6rem;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text-dark);
            letter-spacing: -0.015em;
            margin-bottom: 1rem;
        }

        .compare-hero .hero-text .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            line-height: 1.9;
            margin-bottom: 1.5rem;
        }

        .compare-hero .hero-text .hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 1.5rem;
        }

        .compare-hero .hero-text .hero-meta .meta-tag {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-body);
            background-color: var(--cool-gray);
            padding: 5px 14px;
            border-radius: var(--radius-full);
            border: 1px solid var(--border-light);
        }

        .compare-hero .hero-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--border-light);
            background-color: var(--cool-gray);
        }

        .compare-hero .hero-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 11px 26px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 700;
            text-decoration: none;
            transition: all var(--transition-fast);
            line-height: 1.5;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: var(--white);
            text-decoration: none;
            box-shadow: var(--shadow-md);
        }

        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary);
        }

        .btn-secondary:hover {
            background-color: #D8E3FF;
            color: var(--primary-dark);
            text-decoration: none;
        }

        .btn-accent {
            background-color: var(--accent);
            color: var(--white);
        }

        .btn-accent:hover {
            background-color: #0A7A6E;
            color: var(--white);
            text-decoration: none;
        }

        .btn-outline {
            background-color: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-outline:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            text-decoration: none;
        }

        /* Comparison Table */
        .compare-table-section {
            background-color: var(--cool-gray);
        }

        .compare-table-wrapper {
            background-color: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            overflow: hidden;
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
        }

        .compare-table thead th {
            background-color: var(--text-dark);
            color: var(--white);
            font-size: 0.88rem;
            font-weight: 700;
            text-align: left;
            padding: 16px 20px;
            white-space: nowrap;
        }

        .compare-table thead th:first-child {
            width: 28%;
        }

        .compare-table tbody td {
            padding: 15px 20px;
            font-size: 0.92rem;
            color: var(--text-body);
            border-bottom: 1px solid var(--border-light);
            vertical-align: top;
            line-height: 1.7;
        }

        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }

        .compare-table tbody tr:nth-child(even) {
            background-color: #FAFBFD;
        }

        .compare-table tbody tr:hover {
            background-color: var(--primary-super-light);
            transition: background-color var(--transition-fast);
        }

        .compare-table .row-label {
            font-weight: 700;
            color: var(--text-dark);
            white-space: nowrap;
        }

        .compare-table .diff-badge {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            white-space: nowrap;
        }

        .compare-table .diff-badge.up {
            background-color: var(--accent-soft);
            color: var(--accent);
        }

        .compare-table .diff-badge.down {
            background-color: #FDF2E1;
            color: var(--amber);
        }

        .compare-table .diff-badge.neutral {
            background-color: var(--secondary-bg);
            color: var(--text-light);
        }

        .compare-note {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 12px;
            line-height: 1.7;
            padding: 0 4px;
        }

        /* Deep Content */
        .deep-content {
            background-color: var(--white);
        }

        .deep-content .deep-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
        }

        .deep-content .deep-text {
            font-size: 0.98rem;
            color: var(--text-body);
            line-height: 1.95;
        }

        .deep-content .deep-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.8rem;
            margin-top: 1.2rem;
        }

        .deep-content .deep-text h3:first-child {
            margin-top: 0;
        }

        .deep-content .deep-text p {
            margin-bottom: 0.9rem;
        }

        .deep-content .deep-text ul {
            list-style: none;
            padding: 0;
            margin: 0.2rem 0 1rem;
        }

        .deep-content .deep-text ul li {
            position: relative;
            padding-left: 24px;
            margin-bottom: 6px;
            line-height: 1.75;
        }

        .deep-content .deep-text ul li::before {
            content: '';
            position: absolute;
            left: 4px;
            top: 11px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--primary);
            opacity: 0.7;
        }

        .deep-content .deep-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            align-self: start;
            position: sticky;
            top: calc(var(--header-height) + 20px);
        }

        .deep-content .deep-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .deep-content .deep-visual .visual-caption {
            font-size: 0.78rem;
            color: var(--text-muted);
            padding: 10px 16px;
            background-color: var(--cool-gray);
            border-top: 1px solid var(--border-light);
        }

        /* Compare Cards */
        .compare-cards-section {
            background-color: var(--secondary-bg);
        }

        .compare-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .compare-card {
            background-color: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 1.6rem;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }

        .compare-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .compare-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 1rem;
            background-color: var(--primary-light);
            color: var(--primary);
        }

        .compare-card .card-icon.accent {
            background-color: var(--accent-soft);
            color: var(--accent);
        }

        .compare-card .card-icon.amber {
            background-color: #FDF2E1;
            color: var(--amber);
        }

        .compare-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.4rem;
        }

        .compare-card .card-stat {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-dark);
            font-family: var(--font-mono);
            letter-spacing: -0.02em;
            margin-bottom: 0.3rem;
        }

        .compare-card .card-stat span {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent);
        }

        .compare-card p {
            font-size: 0.88rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Insight Section */
        .insight-section {
            background-color: var(--white);
        }

        .insight-block {
            background-color: var(--white);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 2rem;
            box-shadow: var(--shadow-sm);
        }

        .insight-block .insight-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 2rem;
            align-items: start;
        }

        .insight-block .insight-text {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.9;
        }

        .insight-block .insight-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.7rem;
        }

        .insight-block .insight-text p {
            margin-bottom: 0.8rem;
        }

        .insight-block .insight-highlight {
            background-color: var(--primary-super-light);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.8;
            margin: 1rem 0;
        }

        .insight-block .insight-highlight strong {
            color: var(--primary);
            font-weight: 700;
        }

        /* FAQ */
        .faq-section {
            background-color: var(--cool-gray);
        }

        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: box-shadow var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-item details summary {
            padding: 18px 22px;
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-dark);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: background-color var(--transition-fast);
        }

        .faq-item details summary::-webkit-details-marker {
            display: none;
        }

        .faq-item details summary:hover {
            background-color: var(--primary-super-light);
        }

        .faq-item details summary .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            transition: transform var(--transition-fast);
        }

        .faq-item details[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-item details .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.8;
            background-color: var(--primary-super-light);
            border-top: 1px solid var(--border-light);
            padding-top: 14px;
        }

        /* CTA */
        .cta-section {
            background-color: var(--white);
        }

        .cta-panel {
            background-color: var(--text-dark);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2.5rem;
            box-shadow: var(--shadow-lg);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
        }

        .cta-panel h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 0.4rem;
            line-height: 1.3;
        }

        .cta-panel p {
            font-size: 0.98rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 0;
            max-width: 480px;
            line-height: 1.7;
        }

        .cta-panel .cta-buttons {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .cta-panel .btn-primary {
            background-color: var(--primary);
            color: var(--white);
        }

        .cta-panel .btn-primary:hover {
            background-color: var(--primary-dark);
            color: var(--white);
        }

        .cta-panel .btn-light {
            background-color: rgba(255, 255, 255, 0.12);
            color: var(--white);
            border: 1px solid rgba(255, 255, 255, 0.3);
        }

        .cta-panel .btn-light:hover {
            background-color: rgba(255, 255, 255, 0.2);
            color: var(--white);
        }

        /* Footer */
        .site-footer {
            background-color: var(--text-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 3.5rem 0 1.8rem;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .site-footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 0.8rem;
            letter-spacing: -0.01em;
        }

        .site-footer .footer-brand-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.8;
            max-width: 340px;
        }

        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 0.9rem;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 6px;
        }

        .site-footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer ul li a:hover {
            color: var(--white);
            text-decoration: underline;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding-top: 1.2rem;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.55);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
        }

        .site-footer .footer-bottom a:hover {
            color: var(--white);
            text-decoration: underline;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .compare-hero .hero-grid {
                gap: 2.5rem;
            }

            .compare-hero .hero-text h1 {
                font-size: 2.1rem;
            }

            .deep-content .deep-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }

            .deep-content .deep-visual {
                position: relative;
                top: 0;
                max-height: 380px;
            }

            .compare-cards-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .insight-block .insight-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .compare-hero {
                padding: 2.5rem 0 2rem;
            }

            .compare-hero .hero-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .compare-hero .hero-text h1 {
                font-size: 1.7rem;
            }

            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 14px;
                font-size: 0.82rem;
            }

            .compare-cards-grid {
                grid-template-columns: 1fr;
            }

            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 1.8rem;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.8rem;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }

            .section {
                padding: var(--section-spacing-mobile) 0;
            }

            .breadcrumb-bar .container {
                gap: 4px;
            }
        }

        @media (max-width: 520px) {
            .compare-hero .hero-text h1 {
                font-size: 1.4rem;
                line-height: 1.4;
            }

            .compare-hero .hero-text .hero-subtitle {
                font-size: 0.92rem;
            }

            .btn {
                padding: 9px 18px;
                font-size: 0.88rem;
            }

            .compare-table-wrapper {
                overflow-x: auto;
                -webkit-overflow-scrolling: touch;
            }

            .compare-table {
                min-width: 560px;
            }

            .insight-block {
                padding: 1.4rem;
            }

            .cta-panel {
                padding: 1.4rem;
            }

            .cta-panel h2 {
                font-size: 1.3rem;
            }

            .compare-card {
                padding: 1.3rem;
            }

            .compare-card .card-stat {
                font-size: 1.3rem;
            }
        }

/* roulang page: category4 */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 64px;
            --section-spacing-mobile: 48px;
            --header-height: 60px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            padding: 0;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-spacing-desktop) 0;
        }

        .section--gray {
            background-color: var(--secondary-bg);
        }

        .section--cool {
            background-color: var(--cool-gray);
        }

        .section--white {
            background-color: var(--white);
        }

        .section--primary-light {
            background-color: var(--primary-super-light);
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.8rem;
        }

        .section-header h2 {
            margin-bottom: 0.6rem;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
        }

        h1,
        h2,
        h3,
        h4 {
            color: var(--text-dark);
            line-height: 1.4;
            margin-top: 0;
            font-weight: 700;
        }

        h1 {
            font-size: 2rem;
            margin-bottom: 0.8rem;
            letter-spacing: -0.01em;
        }

        h2 {
            font-size: 1.65rem;
            letter-spacing: -0.01em;
        }

        h3 {
            font-size: 1.25rem;
            letter-spacing: 0;
        }

        h4 {
            font-size: 1rem;
            letter-spacing: 0;
        }

        p {
            margin: 0 0 1.2rem;
            color: var(--text-body);
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }

        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: var(--white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-desktop li {
            margin: 0;
        }

        .nav-desktop a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .nav-desktop a:hover {
            color: var(--primary);
            background-color: var(--primary-light);
            text-decoration: none;
        }

        .nav-desktop a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background-color: var(--secondary-bg);
            transition: background-color var(--transition-fast);
        }

        .nav-toggle:hover {
            background-color: var(--primary-light);
        }

        .nav-toggle span {
            display: block;
            width: 100%;
            height: 2px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-mobile {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            padding: 16px 20px 20px;
            z-index: 99;
        }

        .nav-mobile ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-mobile li {
            margin: 0;
        }

        .nav-mobile a {
            display: block;
            padding: 12px 16px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .nav-mobile a:hover {
            color: var(--primary);
            background-color: var(--primary-light);
            text-decoration: none;
        }

        .nav-mobile a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-bar {
            background-color: var(--cool-gray);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
        }

        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .breadcrumb-nav a:hover {
            color: var(--primary);
            text-decoration: none;
        }

        .breadcrumb-nav .breadcrumb-sep {
            color: var(--text-muted);
            font-size: 0.75rem;
        }

        .breadcrumb-nav .breadcrumb-current {
            color: var(--text-dark);
            font-weight: 600;
            white-space: nowrap;
        }

        .breadcrumb-nav .breadcrumb-back {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            color: var(--primary);
            font-weight: 600;
            white-space: nowrap;
        }

        /* ========== Hero ========== */
        .page-hero {
            background-color: var(--primary-super-light);
            border-bottom: 1px solid var(--border-light);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(46, 91, 255, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            margin-bottom: 16px;
            max-width: 800px;
        }

        .page-hero .hero-desc {
            font-size: 1.08rem;
            color: var(--text-body);
            max-width: 700px;
            line-height: 1.9;
            margin-bottom: 0;
        }

        .page-hero .hero-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 20px;
        }

        .page-hero .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-body);
            background-color: var(--white);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: var(--radius-full);
            transition: all var(--transition-fast);
        }

        .page-hero .hero-tag i {
            color: var(--primary);
            font-size: 0.75rem;
        }

        /* ========== Search Section ========== */
        .search-section {
            padding: 32px 0 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 0;
            max-width: 640px;
            background-color: var(--white);
            border: 2px solid var(--border);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            overflow: hidden;
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(46, 91, 255, 0.12);
        }

        .search-box .search-icon {
            padding: 0 16px;
            color: var(--text-muted);
            font-size: 1rem;
            flex-shrink: 0;
        }

        .search-box input {
            flex: 1;
            border: none;
            padding: 14px 0;
            font-size: 0.95rem;
            color: var(--text-dark);
            background: transparent;
            outline: none;
            min-width: 0;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-box button {
            padding: 14px 20px;
            background-color: var(--primary);
            color: var(--white);
            font-weight: 600;
            font-size: 0.88rem;
            border-radius: 0;
            transition: all var(--transition-fast);
            flex-shrink: 0;
        }

        .search-box button:hover {
            background-color: var(--primary-dark);
        }

        .search-hints {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
            font-size: 0.8rem;
            color: var(--text-light);
            align-items: center;
        }

        .search-hints span {
            color: var(--text-muted);
        }

        .search-hints a {
            display: inline-block;
            padding: 4px 10px;
            background-color: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition-fast);
        }

        .search-hints a:hover {
            background-color: var(--primary);
            color: var(--white);
            text-decoration: none;
        }

        /* ========== FAQ Section ========== */
        .faq-section {
            padding: 48px 0 56px;
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }

        .faq-item.open {
            border-color: var(--primary);
            box-shadow: 0 8px 28px rgba(46, 91, 255, 0.10);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            cursor: pointer;
            transition: background-color var(--transition-fast);
            text-align: left;
            width: 100%;
            background: none;
            border: none;
            font-family: inherit;
        }

        .faq-question:hover {
            background-color: var(--primary-super-light);
        }

        .faq-question .faq-q-text {
            display: flex;
            align-items: center;
            gap: 12px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-dark);
            line-height: 1.5;
            flex: 1;
        }

        .faq-question .faq-q-icon {
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .faq-question .faq-toggle-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background-color: var(--secondary-bg);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-light);
            font-size: 0.8rem;
            transition: all var(--transition-base);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-toggle-icon {
            background-color: var(--primary);
            color: var(--white);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            background-color: var(--primary-super-light);
            border-top: 0;
        }

        .faq-item.open .faq-answer {
            border-top: 1px solid var(--border-light);
        }

        .faq-answer-inner {
            padding: 20px 22px 24px;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.9;
        }

        .faq-answer-inner p {
            margin-bottom: 10px;
        }

        .faq-answer-inner p:last-child {
            margin-bottom: 0;
        }

        .faq-coverpic-wrap {
            margin: 8px 0 16px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border-light);
        }

        .faq-coverpic-wrap img {
            width: 100%;
            height: 180px;
            object-fit: cover;
        }

        /* ========== Knowledge Cards ========== */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
            margin-top: 24px;
        }

        .knowledge-card {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
        }

        .knowledge-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .knowledge-card .kc-icon {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.1rem;
            margin-bottom: 14px;
        }

        .knowledge-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .knowledge-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ========== Deep Content Area ========== */
        .deep-content {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            box-shadow: var(--shadow-sm);
            margin-top: 32px;
        }

        .deep-content h3 {
            margin: 28px 0 12px;
            font-size: 1.2rem;
        }

        .deep-content h3:first-child {
            margin-top: 0;
        }

        .deep-content p {
            color: var(--text-body);
            line-height: 1.95;
        }

        .deep-content ul,
        .deep-content ol {
            margin: 0 0 1.2rem 1.5rem;
            padding: 0;
            color: var(--text-body);
        }

        .deep-content li {
            margin-bottom: 8px;
            line-height: 1.8;
        }

        .deep-content .highlight-box {
            background-color: var(--primary-super-light);
            border-left: 4px solid var(--primary);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            font-size: 0.95rem;
            color: var(--text-body);
        }

        .deep-content .data-note {
            display: inline-block;
            background-color: var(--accent-soft);
            color: var(--accent);
            padding: 4px 12px;
            border-radius: var(--radius-full);
            font-size: 0.8rem;
            font-weight: 700;
            margin-right: 8px;
        }

        /* ========== CTA Section ========== */
        .cta-section {
            background-color: var(--primary-super-light);
            border-top: 1px solid var(--border-light);
            padding: 56px 0;
        }

        .cta-box {
            background-color: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
        }

        .cta-box h2 {
            margin-bottom: 8px;
            font-size: 1.5rem;
        }

        .cta-box p {
            color: var(--text-light);
            margin-bottom: 0;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 22px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all var(--transition-fast);
            border: none;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: var(--white);
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary);
        }

        .btn-secondary:hover {
            background-color: var(--primary);
            color: var(--white);
            text-decoration: none;
        }

        .btn-outline {
            background-color: transparent;
            border: 1.5px solid var(--border);
            color: var(--text-body);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            text-decoration: none;
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--text-dark);
            color: #B0B8C4;
            padding: 48px 0 24px;
        }

        .site-footer .container {
            max-width: var(--container-max);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .footer-brand-desc {
            font-size: 0.88rem;
            color: #9AA5B1;
            line-height: 1.8;
            margin-bottom: 0;
        }

        .site-footer h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 14px;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }

        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-footer ul li {
            margin-bottom: 8px;
        }

        .site-footer ul a {
            color: #9AA5B1;
            font-size: 0.88rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer ul a:hover {
            color: var(--white);
            text-decoration: none;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            font-size: 0.8rem;
            color: #8893A0;
        }

        .footer-bottom p {
            margin: 4px 0;
            color: #8893A0;
        }

        .footer-bottom a {
            color: #9AA5B1;
            text-decoration: none;
        }

        .footer-bottom a:hover {
            color: var(--white);
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            :root {
                --section-spacing-desktop: 52px;
            }

            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

            .deep-content {
                padding: 28px 24px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-mobile.open {
                display: block;
            }

            h1 {
                font-size: 1.65rem;
            }

            h2 {
                font-size: 1.4rem;
            }

            .page-hero {
                padding: 36px 0 32px;
            }

            .page-hero .hero-desc {
                font-size: 0.95rem;
            }

            .knowledge-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .cta-box {
                padding: 28px 22px;
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }

            .deep-content {
                padding: 20px 16px;
            }

            .faq-question {
                padding: 15px 16px;
            }

            .faq-question .faq-q-text {
                font-size: 0.92rem;
                gap: 8px;
            }

            .faq-answer-inner {
                padding: 16px 16px 20px;
            }

            .breadcrumb-nav {
                font-size: 0.78rem;
                overflow-x: auto;
                white-space: nowrap;
                -webkit-overflow-scrolling: touch;
                scrollbar-width: none;
            }

            .breadcrumb-nav::-webkit-scrollbar {
                display: none;
            }

            .search-box button {
                padding: 14px 16px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-spacing-desktop: 44px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }

            .page-hero h1 {
                font-size: 1.45rem;
            }

            .cta-actions {
                flex-direction: column;
                width: 100%;
            }

            .btn {
                justify-content: center;
                width: 100%;
            }
        }

/* roulang page: category1 */
:root {
 --primary: #2E5BFF;
 --primary-dark: #1E3FBF;
 --primary-light: #E8EEFF;
 --primary-super-light: #F5F8FF;
 --secondary-bg: #EFF3F8;
 --cool-gray: #F5F7FA;
 --text-dark: #1F2937;
 --text-body: #374151;
 --text-light: #6B7280;
 --text-muted: #9CA3AF;
 --accent: #0E9384;
 --accent-soft: #E6F5F3;
 --amber: #C8891A;
 --border: #DCDFE6;
 --border-light: #E2E5EA;
 --white: #FFFFFF;
 --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
 --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
 --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
 --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
 --radius-sm: 8px;
 --radius-md: 12px;
 --radius-lg: 16px;
 --radius-full: 9999px;
 --transition-fast: 0.2s ease;
 --transition-base: 0.3s ease;
 --transition-slow: 0.45s ease;
 --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
 --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
 --container-max: 1180px;
 --section-spacing-desktop: 64px;
 --section-spacing-mobile: 52px;
 --header-height: 60px;
 }

 html {
 font-size: 16px;
 -webkit-font-smoothing: antialiased;
 -moz-osx-font-smoothing: grayscale;
 scroll-behavior: smooth;
 }

 body {
 font-family: var(--font-sans);
 font-size: 1rem;
 line-height: 1.85;
 color: var(--text-dark);
 background-color: var(--white);
 overflow-x: hidden;
 min-height: 100vh;
 margin: 0;
 }

 *, *::before, *::after {
 box-sizing: border-box;
 }

 img {
 max-width: 100%;
 height: auto;
 display: block;
 }

 a {
 color: var(--primary);
 text-decoration: none;
 transition: color var(--transition-fast);
 }

 a:hover {
 color: var(--primary-dark);
 text-decoration: underline;
 }

 a:focus-visible {
 outline: 2px solid var(--primary);
 outline-offset: 3px;
 border-radius: 4px;
 }

 button, input, select, textarea {
 font-family: inherit;
 font-size: inherit;
 line-height: inherit;
 }

 button {
 cursor: pointer;
 border: none;
 background: none;
 font-family: inherit;
 }

 button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
 outline: 2px solid var(--primary);
 outline-offset: 2px;
 }

 h1, h2, h3, h4, h5, h6 {
 color: var(--text-dark);
 margin-top: 0;
 line-height: 1.4;
 font-weight: 700;
 }

 h1 {
 font-size: clamp(1.75rem, 4vw, 2.5rem);
 margin-bottom: 1rem;
 }

 h2 {
 font-size: clamp(1.4rem, 3vw, 1.75rem);
 margin-bottom: 0.75rem;
 }

 h3 {
 font-size: 1.15rem;
 margin-bottom: 0.5rem;
 }

 p {
 margin-bottom: 1rem;
 }

 ul, ol {
 margin: 0 0 1rem 1.2rem;
 padding: 0;
 }

 .container {
 max-width: var(--container-max);
 margin: 0 auto;
 padding: 0 20px;
 }

 .section {
 padding: var(--section-spacing-desktop) 0;
 }

 .section--gray {
 background-color: var(--secondary-bg);
 }

 .section--cool {
 background-color: var(--cool-gray);
 }

 .section--white {
 background-color: var(--white);
 }

 .section--primary-light {
 background-color: var(--primary-super-light);
 }

 .section-header {
 margin-bottom: 2.5rem;
 }

 .section-header .eyebrow {
 display: inline-block;
 font-size: 0.8rem;
 font-weight: 700;
 letter-spacing: 0.08em;
 text-transform: uppercase;
 color: var(--primary);
 background-color: var(--primary-light);
 padding: 4px 14px;
 border-radius: var(--radius-full);
 margin-bottom: 0.8rem;
 }

 .section-header h2 {
 margin-bottom: 0.6rem;
 }

 .section-header .section-desc {
 font-size: 0.98rem;
 color: var(--text-light);
 max-width: 680px;
 line-height: 1.8;
 }

 /* Header & Navigation */
 .site-header {
 position: sticky;
 top: 0;
 z-index: 100;
 background-color: rgba(255, 255, 255, 0.96);
 backdrop-filter: blur(12px);
 -webkit-backdrop-filter: blur(12px);
 border-bottom: 1px solid var(--border-light);
 box-shadow: var(--shadow-sm);
 height: var(--header-height);
 display: flex;
 align-items: center;
 }

 .site-header .container {
 display: flex;
 align-items: center;
 justify-content: space-between;
 width: 100%;
 }

 .brand-logo {
 display: flex;
 align-items: center;
 gap: 10px;
 font-size: 1.35rem;
 font-weight: 800;
 color: var(--text-dark);
 white-space: nowrap;
 letter-spacing: -0.02em;
 text-decoration: none;
 }

 .brand-logo:hover {
 color: var(--text-dark);
 text-decoration: none;
 }

 .brand-logo .logo-icon {
 width: 38px;
 height: 38px;
 border-radius: var(--radius-sm);
 background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
 color: #fff;
 display: inline-flex;
 align-items: center;
 justify-content: center;
 font-weight: 800;
 font-size: 1.1rem;
 }

 .site-header nav {
 display: flex;
 align-items: center;
 }

 .nav-desktop {
 display: flex;
 list-style: none;
 margin: 0;
 padding: 0;
 gap: 4px;
 align-items: center;
 flex-wrap: wrap;
 }

 .nav-desktop li {
 margin: 0;
 list-style: none;
 }

 .nav-desktop a {
 display: inline-block;
 padding: 8px 14px;
 border-radius: var(--radius-sm);
 font-size: 0.92rem;
 font-weight: 600;
 color: var(--text-body);
 text-decoration: none;
 transition: all var(--transition-fast);
 white-space: nowrap;
 }

 .nav-desktop a:hover {
 color: var(--primary);
 background-color: var(--primary-super-light);
 text-decoration: none;
 }

 .nav-desktop a.active {
 color: var(--primary);
 background-color: var(--primary-light);
 }

 .nav-toggle {
 display: none;
 flex-direction: column;
 gap: 5px;
 width: 42px;
 height: 42px;
 border-radius: var(--radius-sm);
 background: transparent;
 border: 1px solid var(--border);
 align-items: center;
 justify-content: center;
 padding: 0;
 }

 .nav-toggle span {
 display: block;
 width: 20px;
 height: 2px;
 background-color: var(--text-dark);
 border-radius: 2px;
 transition: all var(--transition-fast);
 }

 .nav-mobile {
 display: none;
 background-color: var(--white);
 border-bottom: 1px solid var(--border-light);
 padding: 12px 20px;
 box-shadow: var(--shadow-lg);
 }

 .nav-mobile ul {
 list-style: none;
 margin: 0;
 padding: 0;
 display: flex;
 flex-direction: column;
 gap: 4px;
 }

 .nav-mobile li {
 list-style: none;
 }

 .nav-mobile a {
 display: block;
 padding: 10px 14px;
 border-radius: var(--radius-sm);
 font-size: 0.95rem;
 font-weight: 600;
 color: var(--text-body);
 text-decoration: none;
 transition: all var(--transition-fast);
 }

 .nav-mobile a:hover,
 .nav-mobile a.active {
 color: var(--primary);
 background-color: var(--primary-super-light);
 }

 .breadcrumb-bar {
 background-color: var(--cool-gray);
 border-bottom: 1px solid var(--border-light);
 padding: 14px 0;
 }

 .breadcrumb-nav {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 0.9rem;
 color: var(--text-light);
 flex-wrap: nowrap;
 overflow-x: auto;
 -webkit-overflow-scrolling: touch;
 scrollbar-width: thin;
 }

 .breadcrumb-nav a {
 color: var(--text-light);
 text-decoration: none;
 white-space: nowrap;
 transition: color var(--transition-fast);
 }

 .breadcrumb-nav a:hover {
 color: var(--primary);
 text-decoration: none;
 }

 .breadcrumb-nav .separator {
 color: var(--text-muted);
 white-space: nowrap;
 }

 .breadcrumb-nav .back-link {
 color: var(--primary);
 font-weight: 600;
 white-space: nowrap;
 margin-left: auto;
 }

 .breadcrumb-nav .back-link:hover {
 color: var(--primary-dark);
 }

 /* Hero */
 .hero-dashboard {
 background-color: var(--primary-super-light);
 padding: 56px 0 48px;
 position: relative;
 overflow: hidden;
 border-bottom: 1px solid var(--border-light);
 }

 .hero-dashboard::before {
 content: '';
 position: absolute;
 inset: 0;
 background-image: url('/assets/images/backpic/back-1.webp');
 background-size: cover;
 background-position: center;
 opacity: 0.08;
 pointer-events: none;
 }

 .hero-dashboard .container {
 position: relative;
 z-index: 1;
 }

 .hero-dashboard .hero-grid {
 display: grid;
 grid-template-columns: 1.2fr 0.8fr;
 gap: 40px;
 align-items: center;
 }

 .hero-dashboard h1 {
 margin-bottom: 16px;
 font-size: clamp(1.9rem, 4.5vw, 2.7rem);
 }

 .hero-dashboard .hero-subtitle {
 font-size: 1.05rem;
 color: var(--text-light);
 max-width: 560px;
 line-height: 1.8;
 margin-bottom: 24px;
 }

 .hero-dashboard .hero-actions {
 display: flex;
 gap: 12px;
 flex-wrap: wrap;
 }

 .hero-dashboard .hero-visual {
 border-radius: var(--radius-lg);
 overflow: hidden;
 box-shadow: var(--shadow-lg);
 background-color: var(--white);
 border: 1px solid var(--border);
 }

 .hero-dashboard .hero-visual img {
 width: 100%;
 height: 260px;
 object-fit: cover;
 }

 .hero-dashboard .hero-visual .visual-caption {
 padding: 12px 16px;
 font-size: 0.82rem;
 color: var(--text-light);
 border-top: 1px solid var(--border-light);
 background-color: var(--white);
 }

 /* Buttons */
 .btn {
 display: inline-flex;
 align-items: center;
 justify-content: center;
 gap: 8px;
 padding: 12px 24px;
 font-size: 0.95rem;
 font-weight: 700;
 border-radius: var(--radius-sm);
 border: none;
 cursor: pointer;
 transition: all var(--transition-fast);
 text-decoration: none;
 white-space: nowrap;
 }

 .btn:hover {
 text-decoration: none;
 transform: translateY(-1px);
 }

 .btn-primary {
 background-color: var(--primary);
 color: #fff;
 box-shadow: var(--shadow-md);
 }

 .btn-primary:hover {
 background-color: var(--primary-dark);
 color: #fff;
 box-shadow: var(--shadow-lg);
 }

 .btn-secondary {
 background-color: var(--primary-light);
 color: var(--primary);
 }

 .btn-secondary:hover {
 background-color: #D6E0FF;
 color: var(--primary-dark);
 }

 .btn-outline {
 background-color: transparent;
 color: var(--primary);
 border: 1.5px solid var(--primary);
 }

 .btn-outline:hover {
 background-color: var(--primary-super-light);
 color: var(--primary-dark);
 }

 .btn-accent {
 background-color: var(--accent);
 color: #fff;
 box-shadow: var(--shadow-md);
 }

 .btn-accent:hover {
 background-color: #0B7A6E;
 color: #fff;
 box-shadow: var(--shadow-lg);
 }

 .btn-sm {
 padding: 8px 16px;
 font-size: 0.85rem;
 }

 /* Filter & Overview Layout */
 .dashboard-layout {
 display: grid;
 grid-template-columns: 280px 1fr;
 gap: 32px;
 align-items: start;
 }

 .filter-panel {
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 box-shadow: var(--shadow-sm);
 overflow: hidden;
 position: sticky;
 top: calc(var(--header-height) + 20px);
 }

 .filter-panel .panel-header {
 padding: 20px 20px 14px;
 border-bottom: 1px solid var(--border-light);
 display: flex;
 align-items: center;
 justify-content: space-between;
 }

 .filter-panel .panel-header h3 {
 font-size: 1rem;
 margin: 0;
 }

 .filter-panel .panel-header .reset-btn {
 font-size: 0.8rem;
 color: var(--text-muted);
 transition: color var(--transition-fast);
 }

 .filter-panel .panel-header .reset-btn:hover {
 color: var(--primary);
 }

 .filter-panel .panel-body {
 padding: 16px 20px 20px;
 }

 .filter-group {
 margin-bottom: 20px;
 }

 .filter-group label {
 display: block;
 font-size: 0.82rem;
 font-weight: 700;
 color: var(--text-light);
 margin-bottom: 8px;
 text-transform: uppercase;
 letter-spacing: 0.05em;
 }

 .filter-group select,
 .filter-group input {
 width: 100%;
 padding: 10px 12px;
 border: 1px solid var(--border);
 border-radius: var(--radius-sm);
 font-size: 0.9rem;
 color: var(--text-dark);
 background-color: var(--white);
 transition: all var(--transition-fast);
 }

 .filter-group select:focus,
 .filter-group input:focus {
 border-color: var(--primary);
 box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.15);
 outline: none;
 }

 .filter-checkboxes {
 display: flex;
 flex-direction: column;
 gap: 8px;
 }

 .filter-checkboxes label {
 display: flex;
 align-items: center;
 gap: 8px;
 font-size: 0.88rem;
 font-weight: 500;
 color: var(--text-body);
 text-transform: none;
 letter-spacing: 0;
 margin: 0;
 cursor: pointer;
 }

 .filter-checkboxes input[type="checkbox"] {
 width: 16px;
 height: 16px;
 accent-color: var(--primary);
 cursor: pointer;
 }

 .filter-apply-btn {
 width: 100%;
 padding: 12px;
 border-radius: var(--radius-sm);
 background-color: var(--primary);
 color: #fff;
 font-weight: 700;
 font-size: 0.95rem;
 transition: all var(--transition-fast);
 }

 .filter-apply-btn:hover {
 background-color: var(--primary-dark);
 }

 /* Indicator Cards */
 .indicator-grid {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 20px;
 }

 .indicator-card {
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-md);
 box-shadow: var(--shadow-sm);
 padding: 20px 22px;
 transition: all var(--transition-base);
 position: relative;
 overflow: hidden;
 }

 .indicator-card:hover {
 box-shadow: var(--shadow-hover);
 border-color: var(--primary-light);
 }

 .indicator-card .card-top {
 display: flex;
 align-items: flex-start;
 justify-content: space-between;
 margin-bottom: 14px;
 }

 .indicator-card .card-label {
 font-size: 0.82rem;
 font-weight: 700;
 color: var(--text-light);
 text-transform: uppercase;
 letter-spacing: 0.05em;
 }

 .indicator-card .badge {
 display: inline-flex;
 align-items: center;
 gap: 4px;
 padding: 4px 10px;
 border-radius: var(--radius-full);
 font-size: 0.75rem;
 font-weight: 700;
 background-color: var(--accent-soft);
 color: var(--accent);
 white-space: nowrap;
 }

 .indicator-card .badge.warning {
 background-color: #FEF5E7;
 color: var(--amber);
 }

 .indicator-card .badge.info {
 background-color: var(--primary-light);
 color: var(--primary);
 }

 .indicator-card .card-value {
 font-size: 2.2rem;
 font-weight: 800;
 font-family: var(--font-mono);
 color: var(--text-dark);
 line-height: 1.2;
 margin-bottom: 8px;
 letter-spacing: -0.01em;
 }

 .indicator-card .card-value .unit {
 font-size: 1rem;
 font-weight: 600;
 color: var(--text-light);
 margin-left: 4px;
 }

 .indicator-card .card-desc {
 font-size: 0.9rem;
 color: var(--text-light);
 line-height: 1.7;
 margin-bottom: 14px;
 }

 .indicator-card .card-progress {
 height: 6px;
 background-color: var(--cool-gray);
 border-radius: var(--radius-full);
 overflow: hidden;
 margin-bottom: 8px;
 }

 .indicator-card .card-progress .progress-bar {
 height: 100%;
 border-radius: var(--radius-full);
 background: linear-gradient(90deg, var(--primary) 0%, #4F7DFF 100%);
 transition: width var(--transition-slow);
 }

 .indicator-card .card-progress .progress-bar.warning {
 background: linear-gradient(90deg, var(--amber) 0%, #D4A53F 100%);
 }

 .indicator-card .card-progress .progress-bar.accent {
 background: linear-gradient(90deg, var(--accent) 0%, #26A69A 100%);
 }

 .indicator-card .card-footer-note {
 font-size: 0.78rem;
 color: var(--text-muted);
 display: flex;
 align-items: center;
 gap: 6px;
 }

 /* Cover card with image */
 .indicator-card.with-cover {
 padding: 0;
 }

 .indicator-card .card-cover {
 height: 140px;
 overflow: hidden;
 border-radius: var(--radius-md) var(--radius-md) 0 0;
 }

 .indicator-card .card-cover img {
 width: 100%;
 height: 100%;
 object-fit: cover;
 }

 .indicator-card .card-body {
 padding: 18px 20px 20px;
 }

 /* Compare summary */
 .compare-summary {
 margin-top: 32px;
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 box-shadow: var(--shadow-md);
 padding: 28px 30px;
 display: grid;
 grid-template-columns: 1fr 1fr 1fr;
 gap: 20px;
 }

 .compare-summary .summary-item {
 text-align: center;
 padding: 16px;
 border-radius: var(--radius-sm);
 background-color: var(--cool-gray);
 }

 .compare-summary .summary-item.highlight {
 background-color: var(--primary-super-light);
 border: 1px solid var(--primary-light);
 }

 .compare-summary .summary-label {
 font-size: 0.82rem;
 font-weight: 700;
 color: var(--text-light);
 margin-bottom: 8px;
 }

 .compare-summary .summary-value {
 font-size: 1.6rem;
 font-weight: 800;
 font-family: var(--font-mono);
 color: var(--text-dark);
 }

 .compare-summary .summary-value.positive {
 color: var(--accent);
 }

 .compare-summary .summary-value.negative {
 color: var(--amber);
 }

 /* Deep content */
 .deep-content {
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 box-shadow: var(--shadow-sm);
 padding: 32px 36px;
 }

 .deep-content h3 {
 margin-top: 24px;
 margin-bottom: 12px;
 }

 .deep-content h3:first-child {
 margin-top: 0;
 }

 .deep-content p {
 color: var(--text-body);
 font-size: 0.98rem;
 line-height: 1.9;
 }

 .deep-content ul {
 color: var(--text-body);
 font-size: 0.98rem;
 line-height: 1.9;
 padding-left: 1.4rem;
 }

 .deep-content blockquote {
 margin: 20px 0;
 padding: 16px 20px;
 background-color: var(--primary-super-light);
 border-left: 4px solid var(--primary);
 border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
 font-size: 0.95rem;
 color: var(--text-body);
 }

 /* FAQ */
 .faq-list {
 display: flex;
 flex-direction: column;
 gap: 12px;
 max-width: 800px;
 margin: 0 auto;
 }

 .faq-item {
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-md);
 overflow: hidden;
 transition: all var(--transition-fast);
 }

 .faq-item:hover {
 border-color: var(--primary-light);
 box-shadow: var(--shadow-sm);
 }

 .faq-item summary {
 padding: 18px 22px;
 cursor: pointer;
 font-weight: 700;
 font-size: 0.98rem;
 color: var(--text-dark);
 list-style: none;
 display: flex;
 align-items: center;
 justify-content: space-between;
 gap: 12px;
 transition: color var(--transition-fast);
 }

 .faq-item summary::-webkit-details-marker {
 display: none;
 }

 .faq-item summary:hover {
 color: var(--primary);
 }

 .faq-item summary .faq-icon {
 flex-shrink: 0;
 width: 28px;
 height: 28px;
 border-radius: 50%;
 background-color: var(--primary-light);
 color: var(--primary);
 display: inline-flex;
 align-items: center;
 justify-content: center;
 font-size: 0.8rem;
 transition: transform var(--transition-fast);
 }

 .faq-item[open] summary .faq-icon {
 transform: rotate(45deg);
 background-color: var(--primary);
 color: #fff;
 }

 .faq-item .faq-answer {
 padding: 0 22px 20px;
 font-size: 0.92rem;
 color: var(--text-light);
 line-height: 1.8;
 border-top: 1px solid var(--border-light);
 padding-top: 14px;
 margin: 0 22px 20px;
 padding-left: 0;
 padding-right: 0;
 }

 .faq-item[open] {
 background-color: var(--cool-gray);
 }

 /* CTA Form */
 .cta-section {
 background-color: var(--primary-super-light);
 border-top: 1px solid var(--border-light);
 }

 .cta-card {
 background-color: var(--white);
 border: 1px solid var(--border);
 border-radius: var(--radius-lg);
 box-shadow: var(--shadow-lg);
 padding: 36px 40px;
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 36px;
 }

 .cta-card .cta-info h3 {
 font-size: 1.4rem;
 margin-bottom: 12px;
 }

 .cta-card .cta-info p {
 color: var(--text-light);
 font-size: 0.95rem;
 }

 .form-group {
 margin-bottom: 16px;
 }

 .form-group label {
 display: block;
 font-size: 0.88rem;
 font-weight: 700;
 color: var(--text-dark);
 margin-bottom: 6px;
 }

 .form-group input,
 .form-group select,
 .form-group textarea {
 width: 100%;
 padding: 12px 14px;
 border: 1px solid var(--border);
 border-radius: var(--radius-sm);
 font-size: 0.92rem;
 color: var(--text-dark);
 transition: all var(--transition-fast);
 background-color: var(--white);
 }

 .form-group input:focus,
 .form-group select:focus,
 .form-group textarea:focus {
 border-color: var(--primary);
 box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.12);
 outline: none;
 }

 .form-group .error-text {
 color: #DC3545;
 font-size: 0.8rem;
 display: none;
 margin-top: 4px;
 }

 .form-row {
 display: grid;
 grid-template-columns: 1fr 1fr;
 gap: 14px;
 }

 /* Footer */
 .site-footer {
 background-color: #1F2937;
 color: #D1D5DB;
 padding: 56px 0 0;
 margin-top: 0;
 }

 .site-footer a {
 color: #D1D5DB;
 text-decoration: none;
 transition: color var(--transition-fast);
 }

 .site-footer a:hover {
 color: #fff;
 text-decoration: none;
 }

 .site-footer .footer-grid {
 display: grid;
 grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
 gap: 36px;
 padding-bottom: 40px;
 }

 .site-footer .footer-brand {
 font-size: 1.3rem;
 font-weight: 800;
 color: #fff;
 margin-bottom: 12px;
 }

 .site-footer .footer-brand-desc {
 font-size: 0.88rem;
 line-height: 1.75;
 color: #9CA3AF;
 }

 .site-footer h4 {
 color: #fff;
 font-size: 1rem;
 margin-bottom: 14px;
 }

 .site-footer ul {
 list-style: none;
 margin: 0;
 padding: 0;
 }

 .site-footer ul li {
 margin-bottom: 8px;
 }

 .site-footer ul a {
 font-size: 0.88rem;
 }

 .site-footer .footer-bottom {
 border-top: 1px solid rgba(255,255,255,0.12);
 padding: 20px 0 24px;
 font-size: 0.82rem;
 color: #9CA3AF;
 text-align: center;
 }

 .site-footer .footer-bottom p {
 margin-bottom: 6px;
 }

 /* Responsive */
 @media (max-width: 1024px) {
 .hero-dashboard .hero-grid {
 grid-template-columns: 1fr;
 gap: 24px;
 }

 .hero-dashboard .hero-visual {
 max-width: 480px;
 }

 .dashboard-layout {
 grid-template-columns: 1fr;
 }

 .filter-panel {
 position: static;
 margin-bottom: 24px;
 }

 .indicator-grid {
 grid-template-columns: 1fr 1fr;
 }

 .cta-card {
 grid-template-columns: 1fr;
 padding: 28px;
 }

 .compare-summary {
 grid-template-columns: 1fr 1fr 1fr;
 }
 }

 @media (max-width: 768px) {
 :root {
 --section-spacing-desktop: 48px;
 }

 .nav-desktop {
 display: none;
 }

 .nav-toggle {
 display: flex;
 }

 .nav-mobile {
 display: block;
 }

 .indicator-grid {
 grid-template-columns: 1fr;
 }

 .compare-summary {
 grid-template-columns: 1fr;
 gap: 12px;
 }

 .deep-content {
 padding: 22px 20px;
 }

 .form-row {
 grid-template-columns: 1fr;
 }

 .site-footer .footer-grid {
 grid-template-columns: 1fr;
 gap: 24px;
 }

 .hero-dashboard {
 padding: 36px 0 32px;
 }

 .cta-card {
 padding: 22px 20px;
 }
 }

 @media (max-width: 520px) {
 .breadcrumb-nav {
 font-size: 0.8rem;
 }

 .breadcrumb-nav .back-link {
 font-size: 0.8rem;
 }

 .indicator-card .card-value {
 font-size: 1.8rem;
 }

 .compare-summary {
 padding: 18px;
 }

 .section-header {
 margin-bottom: 1.8rem;
 }
 }

/* roulang page: category5 */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 64px;
            --section-spacing-mobile: 48px;
            --header-height: 60px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-spacing-desktop) 0;
        }
        .section--gray {
            background-color: var(--secondary-bg);
        }
        .section--cool {
            background-color: var(--cool-gray);
        }
        .section--white {
            background-color: var(--white);
        }
        .section--primary-light {
            background-color: var(--primary-super-light);
        }
        .section-header {
            margin-bottom: 2.2rem;
        }
        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.7rem;
        }
        .section-header h2 {
            margin-bottom: 0.5rem;
            font-size: 1.7rem;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.4;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }
        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }
        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-desktop li a {
            display: inline-block;
            padding: 8px 14px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-full);
            white-space: nowrap;
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .nav-desktop li a:hover {
            color: var(--primary);
            background-color: var(--primary-super-light);
            text-decoration: none;
        }
        .nav-desktop li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background-color: var(--primary-super-light);
            transition: background-color var(--transition-fast);
        }
        .nav-toggle:hover {
            background-color: var(--primary-light);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .nav-mobile {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            padding: 16px 20px 20px;
            z-index: 99;
        }
        .nav-mobile ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .nav-mobile li a {
            display: block;
            padding: 10px 14px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        .nav-mobile li a:hover {
            background-color: var(--primary-super-light);
            color: var(--primary);
            text-decoration: none;
        }
        .nav-mobile li a.active {
            background-color: var(--primary-light);
            color: var(--primary);
            font-weight: 700;
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-bar {
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            padding: 14px 0;
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-wrap: nowrap;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .breadcrumb-bar .container::-webkit-scrollbar {
            display: none;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            white-space: nowrap;
        }
        .breadcrumb-nav a {
            color: var(--text-light);
            text-decoration: none;
            transition: color var(--transition-fast);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
            text-decoration: none;
        }
        .breadcrumb-nav .sep {
            color: var(--text-muted);
            font-size: 0.75rem;
        }
        .breadcrumb-nav .current {
            color: var(--primary);
            font-weight: 700;
        }
        .breadcrumb-back {
            margin-left: auto;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 4px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .breadcrumb-back:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        /* ========== Hero - 专题封面 ========== */
        .topic-hero {
            position: relative;
            background-color: var(--secondary-bg);
            padding: 40px 0 0;
            overflow: hidden;
        }
        .topic-hero .container {
            position: relative;
            z-index: 2;
        }
        .topic-hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--accent-soft);
            color: var(--accent);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 5px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 16px;
        }
        .topic-hero h1 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 0.8rem;
            letter-spacing: -0.02em;
        }
        .topic-hero .topic-summary {
            font-size: 1.02rem;
            color: var(--text-light);
            max-width: 720px;
            line-height: 1.85;
            margin-bottom: 0;
        }
        .topic-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 18px;
            font-size: 0.82rem;
            color: var(--text-muted);
        }
        .topic-hero-meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .topic-hero-meta i {
            color: var(--primary);
        }
        .topic-cover-wrap {
            margin-top: 28px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            background-color: var(--white);
            border: 1px solid var(--border-light);
        }
        .topic-cover-wrap img {
            width: 100%;
            height: 320px;
            object-fit: cover;
        }

        /* ========== 正文区域 ========== */
        .article-body {
            font-size: 1rem;
            color: var(--text-body);
            line-height: 2;
        }
        .article-body h2 {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-top: 2.2rem;
            margin-bottom: 1rem;
            line-height: 1.45;
        }
        .article-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-top: 1.8rem;
            margin-bottom: 0.8rem;
        }
        .article-body p {
            margin-bottom: 1.2rem;
        }
        .article-body ul {
            margin: 0 0 1.2rem 1.2rem;
            padding: 0;
        }
        .article-body ul li {
            margin-bottom: 0.5rem;
            position: relative;
            padding-left: 18px;
        }
        .article-body ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.75em;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--primary);
            opacity: 0.7;
        }
        .article-quote {
            background-color: var(--primary-super-light);
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 20px 24px;
            margin: 1.8rem 0;
            font-size: 1.05rem;
            color: var(--text-dark);
            font-weight: 600;
            line-height: 1.8;
        }
        .article-quote small {
            display: block;
            margin-top: 8px;
            font-size: 0.85rem;
            font-weight: 400;
            color: var(--text-light);
        }
        .figure-block {
            margin: 1.8rem 0;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            background: var(--white);
        }
        .figure-block img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }
        .figure-block .figcaption {
            padding: 12px 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            background-color: var(--cool-gray);
            border-top: 1px solid var(--border-light);
        }
        .data-callout {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            margin: 1.8rem 0;
            padding: 20px 24px;
            background-color: var(--accent-soft);
            border-radius: var(--radius-md);
            border: 1px solid rgba(14, 147, 132, 0.2);
        }
        .data-callout .data-item {
            flex: 1 1 160px;
            min-width: 140px;
        }
        .data-callout .data-item .num {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .data-callout .data-item .lbl {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 4px;
        }

        /* ========== 相关专题卡片 ========== */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            text-decoration: none;
        }
        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .related-card .related-body {
            padding: 16px 18px 18px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .related-tag {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 700;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 3px 10px;
            border-radius: var(--radius-full);
            margin-bottom: 8px;
            align-self: flex-start;
        }
        .related-card h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
            line-height: 1.45;
        }
        .related-card p {
            font-size: 0.85rem;
            color: var(--text-light);
            line-height: 1.7;
            margin-bottom: 10px;
            flex: 1;
        }
        .related-card .related-link {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 5px;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .related-card .related-link:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-fast);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
            padding: 16px 20px;
            font-size: 0.98rem;
            font-weight: 700;
            color: var(--text-dark);
            background: none;
            border: none;
            text-align: left;
            cursor: pointer;
            transition: background-color var(--transition-fast);
        }
        .faq-question:hover {
            background-color: var(--primary-super-light);
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.9rem;
            transition: transform var(--transition-fast);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow);
            background-color: var(--cool-gray);
            border-top: 1px solid transparent;
        }
        .faq-item.open .faq-answer {
            max-height: 500px;
            border-top-color: var(--border-light);
        }
        .faq-answer p {
            padding: 16px 20px;
            margin: 0;
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.85;
        }

        /* ========== CTA ========== */
        .cta-section {
            background-color: var(--primary-super-light);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            gap: 30px;
            flex-wrap: wrap;
        }
        .cta-section .cta-text {
            flex: 1 1 300px;
        }
        .cta-section .cta-text h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .cta-section .cta-text p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .cta-section .cta-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            flex-shrink: 0;
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 22px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            text-decoration: none;
            transition: all var(--transition-base);
            white-space: nowrap;
            border: none;
            cursor: pointer;
            line-height: 1.4;
            letter-spacing: 0.01em;
        }
        .btn:hover {
            text-decoration: none;
            transform: translateY(-1px);
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(46, 91, 255, 0.25);
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: 0 6px 16px rgba(46, 91, 255, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: #D6E0FF;
            color: var(--primary-dark);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background-color: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background-color: var(--primary-super-light);
            color: var(--primary-dark);
        }
        .btn-amber {
            background-color: var(--amber);
            color: #fff;
            box-shadow: 0 4px 12px rgba(200, 137, 26, 0.25);
        }
        .btn-amber:hover {
            background-color: #A97015;
            color: #fff;
            box-shadow: 0 6px 16px rgba(200, 137, 26, 0.35);
        }
        .btn-amber:active {
            transform: translateY(0);
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: #1F2937;
            color: #D1D5DB;
            padding: 48px 0 28px;
            font-size: 0.88rem;
        }
        .site-footer .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 28px;
        }
        .footer-brand {
            font-size: 1.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-brand-desc {
            font-size: 0.85rem;
            color: #9CA3AF;
            line-height: 1.8;
            margin: 0;
        }
        .site-footer h4 {
            font-size: 0.88rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            color: #9CA3AF;
            text-decoration: none;
            transition: color var(--transition-fast);
            font-size: 0.85rem;
        }
        .site-footer ul li a:hover {
            color: #fff;
            text-decoration: none;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            text-align: center;
            font-size: 0.8rem;
            color: #9CA3AF;
            line-height: 1.9;
        }
        .footer-bottom p {
            margin: 0 0 4px;
        }
        .footer-bottom a {
            color: #D1D5DB;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-bottom a:hover {
            color: #fff;
            text-decoration: underline;
        }

        /* ========== 响应式 ========== */
        @media screen and (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .topic-hero h1 {
                font-size: 1.7rem;
            }
            .topic-cover-wrap img {
                height: 260px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-section {
                flex-direction: column;
                text-align: center;
            }
            .cta-section .cta-actions {
                justify-content: center;
            }
        }
        @media screen and (max-width: 768px) {
            :root {
                --section-spacing-desktop: 48px;
                --header-height: 56px;
            }
            .topic-hero h1 {
                font-size: 1.45rem;
            }
            .topic-cover-wrap img {
                height: 200px;
            }
            .article-body h2 {
                font-size: 1.25rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .data-callout {
                flex-direction: column;
                gap: 12px;
                padding: 16px 18px;
            }
            .data-callout .data-item .num {
                font-size: 1.3rem;
            }
            .figure-block img {
                height: 180px;
            }
            .topic-hero {
                padding: 28px 0 0;
            }
        }
        @media screen and (max-width: 520px) {
            :root {
                --section-spacing-desktop: 40px;
            }
            .topic-hero h1 {
                font-size: 1.3rem;
            }
            .topic-cover-wrap img {
                height: 160px;
            }
            .breadcrumb-back {
                font-size: 0.78rem;
            }
            .btn {
                padding: 10px 16px;
                font-size: 0.85rem;
            }
            .cta-section {
                padding: 24px 18px;
            }
        }

/* roulang page: category7 */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 64px;
            --section-spacing-mobile: 48px;
            --header-height: 60px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 4px;
        }

        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }

        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-spacing-desktop) 0;
        }

        .section--gray {
            background-color: var(--secondary-bg);
        }

        .section--cool {
            background-color: var(--cool-gray);
        }

        .section--white {
            background-color: var(--white);
        }

        .section--primary-light {
            background-color: var(--primary-super-light);
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.8rem;
        }

        .section-header h2 {
            margin-bottom: 0.6rem;
            font-size: 1.75rem;
            line-height: 1.4;
            color: var(--text-dark);
            font-weight: 700;
        }

        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 680px;
            line-height: 1.8;
        }

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.4;
            margin: 0 0 0.6rem;
        }

        h1 {
            font-size: 2rem;
        }

        h2 {
            font-size: 1.6rem;
        }

        h3 {
            font-size: 1.2rem;
        }

        /* ========== Header & Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }

        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }

        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            flex-shrink: 0;
        }

        .site-header nav {
            display: flex;
            align-items: center;
        }

        .nav-desktop {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 4px;
            align-items: center;
        }

        .nav-desktop li a {
            display: inline-block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 0.92rem;
            font-weight: 500;
            text-decoration: none;
            transition: background-color var(--transition-fast), color var(--transition-fast);
            white-space: nowrap;
        }

        .nav-desktop li a:hover {
            background-color: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-desktop li a.active {
            background-color: var(--primary);
            color: #fff;
        }

        .nav-mobile {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background: #fff;
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            z-index: 99;
        }

        .nav-mobile ul {
            list-style: none;
            margin: 0;
            padding: 12px 20px;
        }

        .nav-mobile ul li a {
            display: block;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-body);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
        }

        .nav-mobile ul li a:hover,
        .nav-mobile ul li a.active {
            background-color: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background-color: var(--text-dark);
            border-radius: 2px;
            transition: transform var(--transition-fast), opacity var(--transition-fast);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb-bar {
            background-color: var(--cool-gray);
            border-bottom: 1px solid var(--border-light);
            padding: 10px 0;
        }

        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }

        .breadcrumb-bar a,
        .breadcrumb-bar span {
            font-size: 0.85rem;
            color: var(--text-light);
            text-decoration: none;
            flex-shrink: 0;
        }

        .breadcrumb-bar a:hover {
            color: var(--primary);
        }

        .breadcrumb-bar .separator {
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .breadcrumb-bar .current {
            color: var(--text-dark);
            font-weight: 600;
        }

        .breadcrumb-bar .back-link {
            margin-left: auto;
            color: var(--primary);
            font-weight: 600;
            flex-shrink: 0;
        }

        /* ========== Page Hero ========== */
        .page-hero {
            padding: 3rem 0 2.5rem;
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
        }

        .page-hero .container {
            display: flex;
            align-items: center;
            gap: 2.5rem;
            flex-wrap: wrap;
        }

        .page-hero-content {
            flex: 1;
            min-width: 280px;
        }

        .page-hero-content h1 {
            font-size: 2.1rem;
            line-height: 1.35;
            margin-bottom: 0.8rem;
            color: var(--text-dark);
        }

        .page-hero-content p {
            font-size: 1rem;
            color: var(--text-light);
            max-width: 600px;
            line-height: 1.85;
        }

        .page-hero-badge {
            display: inline-block;
            padding: 4px 14px;
            background-color: var(--accent-soft);
            color: var(--accent);
            border-radius: var(--radius-full);
            font-size: 0.78rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .page-hero-image {
            flex: 0 0 320px;
            max-width: 320px;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .page-hero-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }

        /* ========== Timeline Section ========== */
        .timeline-section {
            padding: var(--section-spacing-desktop) 0;
            background-color: var(--white);
        }

        .timeline-wrap {
            position: relative;
            padding-left: 32px;
        }

        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 6px;
            bottom: 0;
            width: 3px;
            background: linear-gradient(to bottom, var(--primary) 0%, var(--accent) 100%);
            border-radius: 3px;
            opacity: 0.5;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 2.2rem;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -25px;
            top: 5px;
            width: 17px;
            height: 17px;
            border-radius: 50%;
            background-color: var(--primary);
            border: 3px solid var(--primary-light);
            z-index: 1;
        }

        .timeline-item--major::before {
            background-color: var(--accent);
            border-color: var(--accent-soft);
            width: 21px;
            height: 21px;
            left: -27px;
        }

        .timeline-item--minor::before {
            background-color: var(--amber);
            border-color: #fdf3e3;
            width: 13px;
            height: 13px;
            left: -23px;
        }

        .timeline-card {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 1.2rem 1.5rem;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }

        .timeline-card:hover {
            box-shadow: var(--shadow-md);
        }

        .timeline-date {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.04em;
            margin-bottom: 0.4rem;
        }

        .timeline-version {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--text-muted);
            font-family: var(--font-mono);
            margin-bottom: 0.6rem;
        }

        .timeline-card h3 {
            font-size: 1.1rem;
            margin-bottom: 0.6rem;
            color: var(--text-dark);
        }

        .timeline-card p {
            font-size: 0.92rem;
            color: var(--text-body);
            line-height: 1.8;
            margin-bottom: 0.6rem;
        }

        .timeline-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .timeline-tags span {
            display: inline-block;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            background-color: var(--primary-light);
            color: var(--primary);
        }

        .timeline-tags span.tag-accent {
            background-color: var(--accent-soft);
            color: var(--accent);
        }

        .timeline-tags span.tag-amber {
            background-color: #fdf3e3;
            color: var(--amber);
        }

        /* ========== Deep Content Section ========== */
        .deep-section {
            background-color: var(--secondary-bg);
            padding: var(--section-spacing-desktop) 0;
        }

        .deep-content {
            max-width: 820px;
            background-color: var(--white);
            border-radius: var(--radius-lg);
            padding: 2rem 2.2rem;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }

        .deep-content h2 {
            font-size: 1.5rem;
            margin-bottom: 1rem;
        }

        .deep-content h3 {
            font-size: 1.15rem;
            margin-top: 1.5rem;
            margin-bottom: 0.6rem;
        }

        .deep-content p {
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.9;
            margin-bottom: 1rem;
        }

        .deep-content ul {
            margin: 0.6rem 0 1rem;
            padding-left: 1.4rem;
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.85;
        }

        .deep-content ul li {
            margin-bottom: 0.3rem;
        }

        /* ========== Stats Section ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }

        .stat-card {
            background-color: var(--white);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.2rem;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }

        .stat-card:hover {
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--primary);
            font-family: var(--font-mono);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.82rem;
            color: var(--text-light);
            margin-top: 0.4rem;
        }

        /* ========== Subscribe CTA ========== */
        .subscribe-section {
            background-color: var(--primary-super-light);
            padding: var(--section-spacing-desktop) 0;
        }

        .subscribe-box {
            background-color: var(--white);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-md);
            max-width: 680px;
            margin: 0 auto;
        }

        .subscribe-box h2 {
            font-size: 1.5rem;
            margin-bottom: 0.8rem;
        }

        .subscribe-box p {
            font-size: 0.95rem;
            color: var(--text-light);
            margin-bottom: 1.5rem;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            max-width: 460px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .subscribe-form input {
            flex: 1;
            min-width: 220px;
            padding: 10px 16px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            color: var(--text-dark);
            background-color: var(--white);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }

        .subscribe-form input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.12);
            outline: none;
        }

        .btn {
            display: inline-block;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 600;
            text-decoration: none;
            transition: all var(--transition-fast);
            cursor: pointer;
            border: none;
            text-align: center;
            line-height: 1.4;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #fff;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-secondary {
            background-color: var(--primary-light);
            color: var(--primary);
        }

        .btn-secondary:hover {
            background-color: #d9e4ff;
            color: var(--primary-dark);
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-accent {
            background-color: var(--accent);
            color: #fff;
        }

        .btn-accent:hover {
            background-color: #0a7a6d;
            color: #fff;
            text-decoration: none;
            transform: translateY(-1px);
        }

        .btn-outline {
            background-color: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }

        .btn-outline:hover {
            background-color: var(--primary-light);
            color: var(--primary-dark);
            text-decoration: none;
        }

        /* ========== Footer ========== */
        .site-footer {
            background-color: var(--text-dark);
            color: var(--text-muted);
            padding: 2.5rem 0 1.2rem;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 1.8rem;
            margin-bottom: 1.8rem;
        }

        .site-footer .footer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.6rem;
        }

        .site-footer .footer-brand-desc {
            font-size: 0.85rem;
            line-height: 1.75;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .site-footer h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 0.8rem;
        }

        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .site-footer ul li {
            margin-bottom: 0.4rem;
        }

        .site-footer ul li a {
            color: var(--text-muted);
            font-size: 0.85rem;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        .site-footer ul li a:hover {
            color: #fff;
            text-decoration: none;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 1.2rem;
            font-size: 0.78rem;
            color: var(--text-muted);
            text-align: center;
        }

        .site-footer .footer-bottom a {
            color: var(--text-muted);
            text-decoration: none;
        }

        .site-footer .footer-bottom a:hover {
            color: #fff;
        }

        .site-footer .footer-bottom p {
            margin-bottom: 0.3rem;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
            }

            .page-hero .container {
                gap: 1.5rem;
            }

            .page-hero-image {
                flex: 0 0 280px;
                max-width: 280px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-spacing-desktop: 48px;
                --header-height: 56px;
            }

            .nav-desktop {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-mobile {
                display: none;
            }

            .nav-mobile.open {
                display: block;
            }

            .page-hero {
                padding: 2rem 0 1.5rem;
            }

            .page-hero .container {
                flex-direction: column;
                text-align: left;
                gap: 1.2rem;
            }

            .page-hero-content h1 {
                font-size: 1.6rem;
            }

            .page-hero-image {
                flex: none;
                max-width: 100%;
                width: 100%;
            }

            .page-hero-image img {
                aspect-ratio: 16/7;
                object-fit: cover;
            }

            .timeline-wrap {
                padding-left: 24px;
            }

            .timeline-wrap::before {
                left: 8px;
                width: 2px;
            }

            .timeline-item::before {
                left: -19px;
                width: 14px;
                height: 14px;
            }

            .timeline-item--major::before {
                left: -21px;
                width: 18px;
                height: 18px;
            }

            .timeline-item--minor::before {
                left: -17px;
                width: 11px;
                height: 11px;
            }

            .timeline-card {
                padding: 1rem 1.1rem;
            }

            .deep-content {
                padding: 1.5rem 1.2rem;
                border-radius: var(--radius-md);
            }

            .subscribe-box {
                padding: 1.8rem 1.2rem;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.8rem;
            }

            .stat-card {
                padding: 1rem 0.8rem;
            }

            .stat-number {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-spacing-desktop: 40px;
                --header-height: 52px;
            }

            .container {
                padding: 0 14px;
            }

            .brand-logo {
                font-size: 1.1rem;
            }

            .brand-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }

            .stats-grid {
                grid-template-columns: 1fr;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.2rem;
            }

            .site-footer .footer-bottom {
                font-size: 0.72rem;
            }

            .breadcrumb-bar .back-link {
                margin-left: 0;
            }

            .timeline-card h3 {
                font-size: 1rem;
            }

            .page-hero-content h1 {
                font-size: 1.4rem;
            }

            .section-header h2 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #2E5BFF;
            --primary-dark: #1E3FBF;
            --primary-light: #E8EEFF;
            --primary-super-light: #F5F8FF;
            --secondary-bg: #EFF3F8;
            --cool-gray: #F5F7FA;
            --text-dark: #1F2937;
            --text-body: #374151;
            --text-light: #6B7280;
            --text-muted: #9CA3AF;
            --accent: #0E9384;
            --accent-soft: #E6F5F3;
            --amber: #C8891A;
            --border: #DCDFE6;
            --border-light: #E2E5EA;
            --white: #FFFFFF;
            --shadow-sm: 0 2px 8px rgba(31, 41, 55, 0.04);
            --shadow-md: 0 8px 24px rgba(31, 41, 55, 0.06);
            --shadow-lg: 0 12px 32px rgba(31, 41, 55, 0.10);
            --shadow-hover: 0 16px 40px rgba(31, 41, 55, 0.13);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-full: 9999px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Inter', system-ui, -apple-system, sans-serif;
            --font-mono: 'DIN', 'Inter', 'Roboto', monospace;
            --container-max: 1180px;
            --section-spacing-desktop: 72px;
            --section-spacing-mobile: 48px;
            --header-height: 60px;
        }
        html {
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-dark);
            background-color: var(--white);
            overflow-x: hidden;
            min-height: 100vh;
            margin: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-spacing-desktop) 0;
        }
        .section--gray {
            background-color: var(--secondary-bg);
        }
        .section--cool {
            background-color: var(--cool-gray);
        }
        .section--white {
            background-color: var(--white);
        }
        .section--primary-light {
            background-color: var(--primary-super-light);
        }
        .section-header {
            margin-bottom: 2.5rem;
        }
        .section-header .eyebrow {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background-color: var(--primary-light);
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-bottom: 0.8rem;
        }
        .section-header h2 {
            margin-bottom: 0.6rem;
            font-size: 1.8rem;
            line-height: 1.45;
            color: var(--text-dark);
            font-weight: 700;
            letter-spacing: -0.01em;
        }
        .section-header .section-desc {
            font-size: 0.98rem;
            color: var(--text-light);
            max-width: 720px;
            line-height: 1.8;
        }
        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-sans);
            line-height: 1.45;
            color: var(--text-dark);
        }
        h1 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 1rem;
        }
        h2 {
            font-size: 1.7rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 0.8rem;
        }
        h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.6rem;
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-body);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .text-light {
            color: var(--text-light);
        }
        .text-primary {
            color: var(--primary);
        }
        .text-accent {
            color: var(--accent);
        }
        .fw-700 {
            font-weight: 700;
        }
        .fw-800 {
            font-weight: 800;
        }
        .mt-0 { margin-top: 0; }
        .mt-1 { margin-top: 0.5rem; }
        .mt-2 { margin-top: 1rem; }
        .mt-3 { margin-top: 1.5rem; }
        .mt-4 { margin-top: 2rem; }
        .mb-0 { margin-bottom: 0; }
        .mb-1 { margin-bottom: 0.5rem; }
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mb-4 { margin-bottom: 2rem; }
        /* Header & Navigation */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background-color: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text-dark);
            white-space: nowrap;
            letter-spacing: -0.02em;
            text-decoration: none;
        }
        .brand-logo:hover {
            color: var(--text-dark);
            text-decoration: none;
        }
        .brand-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary) 0%, #4F7DFF 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            font-family: var(--font-mono);
        }
        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-desktop li a {
            display: inline-block;
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text-body);
            text-decoration: none;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .nav-desktop li a:hover {
            color: var(--primary);
            background-color: var(--primary-super-light);
            text-decoration: none;
        }
        .nav-desktop li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: var(--primary-super-light);
            padding: 0;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background-color: var(--primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .nav-mobile {
            display: none;
            position: fixed;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: var(--white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-lg);
            z-index: 99;
            padding: 12px 20px 18px;
            max-height: calc(100vh - var(--header-height));
            overflow-y: auto;
        }
        .nav-mobile.open {
            display: block;
        }
        .nav-mobile ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .nav-mobile ul li a {
            display: block;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        .nav-mobile ul li a:hover {
            color: var(--primary);
            background-color: var(--primary-super-light);
            text-decoration: none;
        }
        .nav-mobile ul li a.active {
            color: var(--primary);
            background-color: var(--primary-light);
            font-weight: 700;
        }
        /* Breadcrumb */
        .breadcrumb-bar {
            background-color: var(--cool-gray);
            border-bottom: 1px solid var(--border-light);
            padding: 12px 0;
            font-size: 0.88rem;
            color: var(--text-light);
            overflow-x: auto;
            white-space: nowrap;
            -webkit-overflow-scrolling: touch;
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 6px;
            min-width: max-content;
        }
        .breadcrumb-bar a {
            color: var(--text-light);
            text-decoration: none;
            flex-shrink: 0;
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
            text-decoration: underline;
        }
        .breadcrumb-bar .sep {
            color: var(--text-muted);
            flex-shrink: 0;
        }
        .breadcrumb-bar .current {
            color: var(--text-dark);
            font-weight: 600;
            flex-shrink: 0;
        }
        .breadcrumb-bar .back-link {
            margin-left: auto;
            color: var(--primary);
            font-weight: 600;
            flex-shrink: 0;
        }
        /* Hero KV */
        .hero-kv {
            position: relative;
            padding: 0;
            background-color: var(--primary-super-light);
            overflow: hidden;
        }
        .hero-kv .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-kv .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(46, 91, 255, 0.12) 0%, rgba(245, 248, 255, 0.92) 60%, rgba(239, 243, 248, 0.95) 100%);
            z-index: 1;
        }
        .hero-kv .container {
            position: relative;
            z-index: 2;
            padding-top: 64px;
            padding-bottom: 56px;
            min-height: 480px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .hero-kv .hero-tag {
            display: inline-block;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--primary);
            background-color: rgba(255, 255, 255, 0.85);
            padding: 6px 16px;
            border-radius: var(--radius-full);
            border: 1px solid var(--primary-light);
            margin-bottom: 1.2rem;
            width: fit-content;
            box-shadow: var(--shadow-sm);
        }
        .hero-kv h1 {
            font-size: 2.3rem;
            margin-bottom: 0.8rem;
            max-width: 760px;
        }
        .hero-kv .hero-sub {
            font-size: 1.1rem;
            color: var(--text-body);
            max-width: 680px;
            line-height: 1.9;
            margin-bottom: 2rem;
        }
        .countdown-bar {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px 20px;
            background-color: rgba(255, 255, 255, 0.88);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 14px 20px;
            margin-bottom: 2rem;
            max-width: 680px;
            box-shadow: var(--shadow-sm);
        }
        .countdown-bar .cd-label {
            font-size: 0.88rem;
            color: var(--text-light);
            font-weight: 600;
        }
        .countdown-bar .cd-digits {
            display: flex;
            align-items: center;
            gap: 6px;
            font-family: var(--font-mono);
            font-weight: 800;
            color: var(--primary);
            font-size: 1.15rem;
        }
        .countdown-bar .cd-digits span {
            background-color: var(--primary-super-light);
            border-radius: var(--radius-sm);
            padding: 3px 8px;
            min-width: 38px;
            text-align: center;
            display: inline-block;
        }
        .countdown-bar .cd-sep {
            color: var(--text-muted);
            font-weight: 700;
        }
        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            text-decoration: none;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-sm);
            border: 1px solid transparent;
            cursor: pointer;
        }
        .btn:hover {
            text-decoration: none;
            transform: translateY(-1px);
        }
        .btn:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }
        .btn-primary {
            background-color: var(--primary);
            color: #fff;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-outline-primary {
            background-color: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .btn-outline-primary:hover {
            background-color: #dbe6ff;
            color: var(--primary-dark);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background-color: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background-color: #0b7d70;
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-amber {
            background-color: var(--amber);
            color: #fff;
        }
        .btn-amber:hover {
            background-color: #a87114;
            color: #fff;
            box-shadow: var(--shadow-md);
        }
        .btn-sm {
            padding: 9px 18px;
            font-size: 0.86rem;
        }
        .btn-xs {
            padding: 6px 14px;
            font-size: 0.8rem;
        }
        /* Cards */
        .card {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            overflow: hidden;
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }
        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .card .card-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background-color: var(--cool-gray);
        }
        .card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.5s ease;
        }
        .card:hover .card-img img {
            transform: scale(1.03);
        }
        .card .card-body {
            padding: 18px 20px 20px;
        }
        .card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-dark);
            line-height: 1.45;
        }
        .card .card-text {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 12px;
        }
        .card .card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            flex-wrap: wrap;
        }
        .badge {
            display: inline-block;
            padding: 3px 10px;
            border-radius: var(--radius-full);
            font-size: 0.75rem;
            font-weight: 700;
            line-height: 1.5;
        }
        .badge-primary {
            background-color: var(--primary-light);
            color: var(--primary);
        }
        .badge-accent {
            background-color: var(--accent-soft);
            color: var(--accent);
        }
        .badge-amber {
            background-color: #FDF3E2;
            color: var(--amber);
        }
        .badge-gray {
            background-color: var(--secondary-bg);
            color: var(--text-light);
        }
        .rating {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--amber);
        }
        .rating .stars {
            color: var(--amber);
            letter-spacing: 1px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            transition: all var(--transition-fast);
        }
        .card-link:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }
        .card-link i {
            font-size: 0.75rem;
        }
        /* Irregular card matrix */
        .matrix-grid {
            display: grid;
            grid-template-columns: repeat(12, 1fr);
            gap: 20px;
        }
        .matrix-grid .card {
            grid-column: span 4;
        }
        .matrix-grid .card.card--wide {
            grid-column: span 6;
        }
        .matrix-grid .card.card--full {
            grid-column: span 12;
            display: flex;
            flex-direction: row;
        }
        .matrix-grid .card.card--full .card-img {
            width: 40%;
            aspect-ratio: auto;
            min-height: 200px;
        }
        .matrix-grid .card.card--full .card-body {
            width: 60%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        /* Progress & list */
        .hot-list {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .hot-list li {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 16px 18px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }
        .hot-list li:hover {
            box-shadow: var(--shadow-md);
        }
        .hot-list .hot-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 8px;
        }
        .hot-list .hot-name {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-dark);
        }
        .hot-list .hot-value {
            font-family: var(--font-mono);
            font-weight: 800;
            font-size: 1.05rem;
            color: var(--primary);
        }
        .hot-list .progress-bg {
            width: 100%;
            height: 6px;
            background-color: var(--cool-gray);
            border-radius: var(--radius-full);
            overflow: hidden;
        }
        .hot-list .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, var(--primary) 0%, #4F7DFF 100%);
            border-radius: var(--radius-full);
            transition: width 1s ease;
        }
        /* Deep content */
        .deep-block {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
        }
        .deep-block h3 {
            font-size: 1.35rem;
            margin-bottom: 1rem;
        }
        .deep-block p {
            font-size: 1rem;
            line-height: 1.9;
            color: var(--text-body);
        }
        .deep-block ul {
            list-style: none;
            padding: 0;
            margin: 1rem 0;
        }
        .deep-block ul li {
            position: relative;
            padding-left: 26px;
            margin-bottom: 8px;
            font-size: 0.96rem;
            color: var(--text-body);
            line-height: 1.8;
        }
        .deep-block ul li::before {
            content: '\f0da';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--primary);
            font-size: 0.8rem;
            top: 4px;
        }
        .quote-block {
            border-left: 4px solid var(--primary);
            background-color: var(--primary-super-light);
            padding: 18px 24px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 1.5rem 0;
            font-style: italic;
            color: var(--text-body);
            font-size: 0.98rem;
        }
        .data-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background-color: var(--accent-soft);
            color: var(--accent);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 4px 14px;
            border-radius: var(--radius-full);
            margin-right: 8px;
            margin-bottom: 6px;
        }
        /* Scenario grid */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-item {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition-base);
        }
        .scenario-item:hover {
            box-shadow: var(--shadow-md);
        }
        .scenario-item .si-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background-color: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 14px;
        }
        .scenario-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .scenario-item p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 0;
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background-color: var(--white);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: box-shadow var(--transition-base);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item summary {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 0.98rem;
            color: var(--text-dark);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f067';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.85rem;
            color: var(--primary);
            transition: transform var(--transition-base);
        }
        .faq-item[open] summary::after {
            content: '\f068';
        }
        .faq-item .faq-answer {
            padding: 0 22px 20px;
            font-size: 0.93rem;
            color: var(--text-body);
            line-height: 1.85;
        }
        .faq-item[open] {
            background-color: var(--primary-super-light);
        }
        /* CTA Panel */
        .cta-panel {
            background-color: var(--primary-super-light);
            border: 1px solid var(--primary-light);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-md);
        }
        .cta-panel h2 {
            font-size: 1.6rem;
            margin-bottom: 0.8rem;
        }
        .cta-panel p {
            color: var(--text-body);
            max-width: 680px;
            margin-bottom: 1.5rem;
        }
        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: flex-end;
        }
        .cta-form .form-group {
            flex: 1 1 200px;
            min-width: 160px;
        }
        .cta-form label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-body);
            margin-bottom: 6px;
        }
        .cta-form input,
        .cta-form select {
            width: 100%;
            padding: 11px 14px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            background-color: var(--white);
            transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
        }
        .cta-form input:focus,
        .cta-form select:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(46, 91, 255, 0.12);
            outline: none;
        }
        .cta-form .btn {
            flex: 0 0 auto;
            min-width: 140px;
        }
        /* Footer */
        .site-footer {
            background-color: var(--text-dark);
            color: var(--secondary-bg);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .site-footer a {
            color: #C7D2E8;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .site-footer a:hover {
            color: var(--primary-light);
            text-decoration: underline;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 30px;
            margin-bottom: 32px;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .footer-brand-desc {
            font-size: 0.88rem;
            color: #B0B9CC;
            line-height: 1.8;
            max-width: 360px;
        }
        .site-footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .site-footer ul li {
            font-size: 0.88rem;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 6px;
            font-size: 0.82rem;
            color: #9AA5BB;
        }
        .footer-bottom p {
            margin: 0;
            color: inherit;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-spacing-desktop: 56px;
            }
            h1 { font-size: 1.8rem; }
            .hero-kv .container { min-height: 420px; }
            .hero-kv h1 { font-size: 1.9rem; }
            .matrix-grid .card { grid-column: span 6; }
            .matrix-grid .card.card--wide { grid-column: span 6; }
            .matrix-grid .card.card--full { grid-column: span 12; }
            .matrix-grid .card.card--full .card-img { width: 45%; }
            .matrix-grid .card.card--full .card-body { width: 55%; }
            .scenario-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
        }
        @media (max-width: 768px) {
            .nav-desktop { display: none; }
            .nav-toggle { display: flex; }
            .hero-kv .container { padding-top: 44px; padding-bottom: 40px; min-height: 400px; }
            .hero-kv h1 { font-size: 1.7rem; }
            .hero-kv .hero-sub { font-size: 1rem; }
            .countdown-bar { padding: 12px 16px; }
            .countdown-bar .cd-digits { font-size: 1rem; }
            .hero-cta { flex-direction: column; align-items: stretch; }
            .hero-cta .btn { width: 100%; }
            .matrix-grid { gap: 14px; }
            .matrix-grid .card,
            .matrix-grid .card.card--wide,
            .matrix-grid .card.card--full { grid-column: span 12; }
            .matrix-grid .card.card--full { flex-direction: column; }
            .matrix-grid .card.card--full .card-img { width: 100%; aspect-ratio: 16/9; }
            .matrix-grid .card.card--full .card-body { width: 100%; }
            .scenario-grid { grid-template-columns: 1fr; }
            .deep-block { padding: 22px 20px; }
            .cta-panel { padding: 28px 20px; }
            .cta-form { flex-direction: column; }
            .cta-form .btn { width: 100%; }
            .footer-grid { grid-template-columns: 1fr; gap: 20px; }
            .breadcrumb-bar .back-link { margin-left: 0; }
        }
        @media (max-width: 520px) {
            :root {
                --section-spacing-desktop: 40px;
                --section-spacing-mobile: 36px;
                --header-height: 56px;
            }
            .site-header { height: var(--header-height); }
            .brand-logo { font-size: 1.15rem; }
            .brand-logo .logo-icon { width: 32px; height: 32px; font-size: 0.9rem; }
            h1 { font-size: 1.5rem; }
            h2 { font-size: 1.35rem; }
            .hero-kv .container { min-height: 380px; padding-top: 32px; padding-bottom: 32px; }
            .hero-kv h1 { font-size: 1.45rem; }
            .hero-kv .hero-sub { font-size: 0.94rem; }
            .section-header h2 { font-size: 1.35rem; }
            .card .card-title { font-size: 1rem; }
            .deep-block { padding: 18px 14px; font-size: 0.94rem; }
            .countdown-bar { flex-direction: column; align-items: flex-start; }
        }