/* roulang page: index */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 72px;
            --header-height: 72px;
            --promo-height: 36px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
        }

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

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

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

        .section-white {
            background-color: #FFFFFF;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header .section-title {
            margin-bottom: 8px;
        }

        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }

        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }

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

        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }

        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: #FFFFFF;
        }

        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .text-link:hover::after {
            width: 100%;
        }
        .text-link:hover {
            color: var(--primary-dark);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--border);
        }

        .card-cover-wrapper {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 16px;
            aspect-ratio: 16 / 9;
            background-color: var(--bg);
        }
        .card-cover-wrapper img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.35s ease;
            border-radius: 8px;
        }
        .card:hover .card-cover-wrapper img {
            transform: scale(1.02);
        }

        .tag-chip {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            background-color: var(--primary-soft);
            color: var(--primary);
            letter-spacing: 0.3px;
        }

        .meta-text {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ========== 顶部促销条 ========== */
        .promo-bar {
            background-color: #143C6B;
            color: #E8EDF3;
            font-size: 12px;
            line-height: 1.5;
            height: var(--promo-height);
            display: flex;
            align-items: center;
            position: relative;
            z-index: 1002;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            width: 100%;
        }
        .promo-text {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .promo-link {
            color: #9CC3E8;
            font-weight: 500;
            white-space: nowrap;
            transition: var(--transition);
        }
        .promo-link:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }

        /* ========== 主导航 ========== */
        .site-header {
            background-color: #FFFFFF;
            height: var(--header-height);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 1px 4px rgba(30, 90, 168, 0.04);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 20px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--text-main);
        }
        .logo-icon {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
            box-shadow: 0 0 6px rgba(46, 125, 91, 0.4);
        }
        .logo-text {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
            height: 100%;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 14px;
            height: 100%;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
            border-bottom: 3px solid transparent;
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }
        .nav-icon-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: none;
            color: var(--text-secondary);
            font-size: 18px;
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-icon-btn:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .nav-cta {
            padding: 8px 18px;
            font-size: 13px;
            min-width: auto;
            white-space: nowrap;
        }

        .hamburger-btn {
            display: none;
            width: 40px;
            height: 40px;
            border: none;
            background: none;
            font-size: 22px;
            color: var(--text-main);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger-btn:hover {
            background-color: var(--primary-soft);
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -300px;
            width: 280px;
            height: 100vh;
            background: #FFFFFF;
            z-index: 1100;
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
            transition: left 0.3s ease;
            display: flex;
            flex-direction: column;
            padding: 20px;
            gap: 8px;
        }
        .mobile-drawer.open {
            left: 0;
        }
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(0, 0, 0, 0.45);
            z-index: 1050;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 16px;
            padding-bottom: 16px;
            border-bottom: 1px solid var(--border);
        }
        .drawer-close {
            width: 36px;
            height: 36px;
            border: none;
            background: none;
            font-size: 20px;
            color: var(--text-secondary);
            cursor: pointer;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .drawer-close:hover {
            background-color: var(--bg);
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .drawer-nav a {
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .drawer-nav a:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .drawer-nav a.active {
            background-color: var(--primary-soft);
            color: var(--primary);
            font-weight: 600;
        }
        .drawer-cta {
            margin-top: auto;
            padding-top: 16px;
            border-top: 1px solid var(--border);
        }

        /* ========== Hero 首屏 ========== */
        .hero {
            background: linear-gradient(160deg, #F5F7FA 0%, #EAF0F7 60%, #E3ECF5 100%);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(30, 90, 168, 0.06);
            pointer-events: none;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            right: -60px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(46, 125, 91, 0.05);
            pointer-events: none;
        }
        .hero .container {
            position: relative;
            z-index: 1;
        }
        .hero-badge-row {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .hero h1 {
            font-size: 38px;
            font-weight: 700;
            letter-spacing: -0.5px;
            line-height: 1.3;
            color: var(--text-main);
            margin-bottom: 16px;
            max-width: 680px;
        }
        .hero h1 .highlight {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.85;
            max-width: 600px;
            margin-bottom: 24px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            margin-bottom: 28px;
        }
        .hero-icon-matrix {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 12px;
            margin-bottom: 24px;
            max-width: 560px;
        }
        .hero-icon-item {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 12px 14px;
            background: rgba(255, 255, 255, 0.8);
            border-radius: var(--radius-md);
            border: 1px solid rgba(30, 90, 168, 0.1);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .hero-icon-item i {
            font-size: 18px;
            color: var(--primary);
        }
        .hero-icon-item:hover {
            background: #FFFFFF;
            box-shadow: var(--shadow-sm);
            border-color: rgba(30, 90, 168, 0.2);
        }
        .hero-status-bar {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 18px;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            font-size: 13px;
            color: var(--text-secondary);
            max-width: 560px;
            flex-wrap: wrap;
        }
        .status-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background-color: var(--accent-green);
            animation: pulse-dot 2s infinite;
            flex-shrink: 0;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.5); }
        }

        /* ========== KPI 看板 ========== */
        .kpi-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .kpi-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 22px 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .kpi-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .kpi-number {
            font-family: var(--font-mono);
            font-size: 36px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            letter-spacing: -0.5px;
            margin-bottom: 4px;
        }
        .kpi-label {
            font-size: 13px;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .kpi-trend {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            margin-top: 6px;
        }
        .kpi-trend.up { color: var(--accent-green); }
        .kpi-trend.down { color: var(--accent-red); }

        /* ========== 服务矩阵 ========== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .service-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: rgba(30, 90, 168, 0.18);
        }
        .service-card .card-cover-wrapper {
            margin-bottom: 0;
            border-radius: 0;
            aspect-ratio: 16 / 9;
        }
        .service-card .card-cover-wrapper img {
            border-radius: 0;
        }
        .service-card-body {
            padding: 20px 22px 24px;
        }
        .service-card-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
            letter-spacing: -0.3px;
        }
        .service-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 结果对比区 ========== */
        .compare-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
        .compare-list {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--border);
        }
        .compare-match-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
            border-bottom: 1px solid var(--border);
            gap: 12px;
        }
        .compare-match-item:last-child {
            border-bottom: none;
        }
        .match-teams {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            flex: 1;
        }
        .match-score {
            font-family: var(--font-mono);
            font-size: 16px;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
        }
        .match-status {
            font-size: 12px;
            color: var(--text-muted);
            white-space: nowrap;
        }
        .compare-detail-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border: 1px solid var(--border);
        }
        .compare-detail-card h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .compare-index-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px dashed var(--border-input);
            font-size: 14px;
        }
        .compare-index-row:last-child {
            border-bottom: none;
        }
        .compare-index-label {
            color: var(--text-secondary);
        }
        .compare-index-value {
            font-family: var(--font-mono);
            font-weight: 700;
            color: var(--text-main);
        }
        .compare-index-value.up { color: var(--accent-green); }
        .compare-index-value.down { color: var(--accent-red); }

        /* ========== 里程碑 ========== */
        .milestone-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .milestone-item {
            text-align: center;
            padding: 24px 16px;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .milestone-item:hover {
            box-shadow: var(--shadow-md);
        }
        .milestone-num {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 6px;
        }
        .milestone-desc {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== 品牌介绍 ========== */
        .brand-section {
            background: linear-gradient(135deg, #FFFFFF 0%, #F0F5FA 100%);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            position: relative;
            border: 1px solid var(--border);
        }
        .brand-section .brand-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 40%;
            height: 100%;
            object-fit: cover;
            opacity: 0.07;
            pointer-events: none;
        }
        .brand-content {
            padding: 40px 44px;
            position: relative;
            z-index: 1;
            max-width: 780px;
        }
        .brand-content h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-main);
        }
        .brand-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .brand-content p:last-child {
            margin-bottom: 0;
        }

        /* ========== 资讯列表 ========== */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 24px;
        }
        .news-main {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-card {
            display: flex;
            gap: 16px;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 16px;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-color: rgba(30, 90, 168, 0.15);
        }
        .news-thumb {
            width: 120px;
            height: 80px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
            background-color: var(--bg);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 6px;
        }
        .news-body {
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-body h3 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 4px;
            line-height: 1.5;
        }
        .news-body p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .sidebar-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 20px;
            border: 1px solid var(--border);
        }
        .sidebar-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-main);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud .tag-chip {
            cursor: pointer;
            transition: var(--transition);
        }
        .tag-cloud .tag-chip:hover {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .sidebar-link-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .sidebar-link-list a {
            font-size: 13px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 4px 0;
            transition: var(--transition);
        }
        .sidebar-link-list a:hover {
            color: var(--primary);
        }
        .sidebar-link-list a span {
            font-family: var(--font-mono);
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ========== 平台保障 ========== */
        .guarantee-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .guarantee-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .guarantee-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .guarantee-icon {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .guarantee-card h3 {
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .guarantee-card p {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ========== 快速解答 ========== */
        .quick-qa-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .quick-qa-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .quick-qa-card:hover {
            box-shadow: var(--shadow-md);
        }
        .quick-qa-card .qa-q {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .quick-qa-card .qa-q i {
            color: var(--primary);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .quick-qa-card .qa-a {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== FAQ 完整区 ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .faq-item {
            padding: 22px 24px;
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item:hover {
            background-color: #FAFBFD;
        }
        .faq-q {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            padding-left: 14px;
            border-left: 3px solid var(--primary);
            line-height: 1.55;
        }
        .faq-a {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            padding-left: 17px;
        }

        /* ========== 转化表单 ========== */
        .form-section {
            background: linear-gradient(135deg, #FFFFFF 0%, #EAF0F7 100%);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            padding: 40px 44px;
            border: 1px solid rgba(30, 90, 168, 0.12);
        }
        .form-section h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .form-section .form-desc {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.7;
        }
        .form-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 16px;
        }
        .form-group {
            flex: 1;
            min-width: 200px;
        }
        .form-group label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select {
            width: 100%;
            padding: 10px 14px;
            background: var(--bg);
            border: 1px solid var(--border-input);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-main);
            transition: var(--transition);
            font-family: var(--font-sans);
        }
        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(30, 90, 168, 0.1);
        }
        .form-privacy {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 12px;
            line-height: 1.6;
        }
        .form-submit-btn {
            width: 100%;
            min-width: 180px;
            padding: 14px 24px;
            font-size: 16px;
        }

        /* ========== 底部行动横幅 ========== */
        .bottom-cta {
            background: #143C6B;
            border-radius: var(--radius-lg);
            padding: 40px 44px;
            color: #FFFFFF;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .bottom-cta h2 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 4px;
            color: #FFFFFF;
        }
        .bottom-cta p {
            font-size: 14px;
            color: #D0DCE8;
            margin-bottom: 0;
        }

        /* ========== 页脚 ========== */
        .site-footer {
            background-color: #1A2635;
            color: #B8C4D0;
            padding: 48px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .footer-brand .logo {
            color: #FFFFFF;
            margin-bottom: 12px;
            font-size: 18px;
        }
        .footer-brand .logo-text {
            color: #4A8BC2;
        }
        .footer-brand p {
            font-size: 13px;
            color: #8A94A5;
            line-height: 1.7;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-col ul a {
            font-size: 13px;
            color: #8A94A5;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #B8C4D0;
            text-decoration: underline;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 16px 0;
            font-size: 12px;
            color: #6B7684;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }
        .footer-bottom a {
            color: #6B7684;
            transition: var(--transition);
        }
        .footer-bottom a:hover {
            color: #B8C4D0;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .kpi-grid { grid-template-columns: repeat(2, 1fr); }
            .service-grid { grid-template-columns: repeat(2, 1fr); }
            .milestone-grid { grid-template-columns: repeat(2, 1fr); }
            .guarantee-grid { grid-template-columns: repeat(2, 1fr); }
            .quick-qa-grid { grid-template-columns: 1fr; }
            .news-layout { grid-template-columns: 1fr; }
            .compare-layout { grid-template-columns: 1fr; }
            .hero h1 { font-size: 32px; }
            .hero-icon-matrix { grid-template-columns: repeat(2, 1fr); }
            .section { padding: 56px 0; }
            :root { --section-gap: 56px; }
        }

        @media (max-width: 768px) {
            .main-nav { display: none; }
            .hamburger-btn { display: flex; }
            .nav-cta { display: none; }
            .nav-actions .nav-icon-btn.hide-mobile { display: none; }
            .promo-bar .promo-text { font-size: 11px; }
            .hero { padding: 40px 0 36px; }
            .hero h1 { font-size: 26px; }
            .hero-desc { font-size: 14px; }
            .hero-icon-matrix { grid-template-columns: repeat(2, 1fr); gap: 8px; }
            .hero-icon-item { padding: 10px 12px; font-size: 12px; }
            .section { padding: 40px 0; }
            :root { --section-gap: 40px; }
            .kpi-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .kpi-number { font-size: 28px; }
            .service-grid { grid-template-columns: 1fr; }
            .milestone-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .guarantee-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .quick-qa-grid { grid-template-columns: 1fr; gap: 12px; }
            .news-card { flex-direction: column; }
            .news-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
            .brand-content { padding: 24px 20px; }
            .form-section { padding: 24px 20px; }
            .bottom-cta { padding: 24px 20px; flex-direction: column; text-align: center; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
        }

        @media (max-width: 520px) {
            .kpi-grid { grid-template-columns: 1fr; }
            .milestone-grid { grid-template-columns: 1fr; }
            .guarantee-grid { grid-template-columns: 1fr; }
            .hero-icon-matrix { grid-template-columns: 1fr; }
            .hero-status-bar { font-size: 12px; }
            .hero h1 { font-size: 22px; }
            .section-title { font-size: 22px; }
            .form-row { flex-direction: column; }
            .footer-grid { grid-template-columns: 1fr; }
            .news-layout { grid-template-columns: 1fr; }
            .compare-layout { grid-template-columns: 1fr; }
            .container { padding: 0 14px; }
        }

/* roulang page: category2 */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 56px;
            --header-height: 72px;
            --promo-height: 36px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        main {
            flex: 1 0 auto;
        }

        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background-color: var(--bg);
        }
        .section-white {
            background-color: #FFFFFF;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header .section-title {
            margin-bottom: 8px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }
        .badge-blue {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            min-width: auto;
        }
        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .text-link:hover::after {
            width: 100%;
        }
        .text-link:hover {
            color: var(--primary-dark);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .cover-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 8px;
            background-color: #E8EBF0;
        }
        .cover-img-wrap {
            position: relative;
            overflow: hidden;
            border-radius: 8px;
            margin-bottom: 16px;
        }
        .cover-img-wrap .cover-img {
            transition: transform 0.4s ease;
            margin-bottom: 0;
        }
        .cover-img-wrap:hover .cover-img {
            transform: scale(1.02);
        }
        .card-tag {
            position: absolute;
            top: 10px;
            left: 10px;
            z-index: 2;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
            color: #FFFFFF;
            background-color: rgba(30, 90, 168, 0.85);
        }

        /* ===== 顶部促销条 ===== */
        .promo-bar {
            background-color: #143C6B;
            color: rgba(255, 255, 255, 0.85);
            font-size: 12px;
            height: var(--promo-height);
            display: flex;
            align-items: center;
            position: relative;
            z-index: 1001;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .promo-bar-left {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .promo-bar-left i {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.7);
        }
        .promo-bar-right a {
            color: #FFFFFF;
            font-weight: 500;
            font-size: 12px;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .promo-bar-right a:hover {
            color: var(--primary-light);
        }

        /* ===== 主导航 ===== */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 22px;
            color: var(--text-main);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--text-main);
        }
        .logo-icon {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-green);
            flex-shrink: 0;
        }
        .logo-text {
            color: var(--primary);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex: 1;
            justify-content: center;
            padding: 0 16px;
        }
        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 0 14px;
            height: var(--header-height);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 2px 2px 0 0;
            opacity: 0;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a:hover::after {
            opacity: 0.5;
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            opacity: 1;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-actions .icon-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
        }
        .nav-actions .icon-btn:hover {
            background: var(--primary-soft);
            color: var(--primary);
            border-color: var(--primary-light);
        }
        .nav-actions .nav-cta {
            min-width: auto;
            padding: 9px 16px;
            font-size: 14px;
            white-space: nowrap;
        }

        .hamburger {
            display: none;
            border: none;
            background: transparent;
            font-size: 22px;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            line-height: 1;
            transition: var(--transition);
        }
        .hamburger:hover {
            color: var(--primary);
        }

        /* 移动端抽屉 */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 260px;
            height: 100vh;
            background: #FFFFFF;
            box-shadow: 2px 0 16px rgba(0, 0, 0, 0.12);
            z-index: 2000;
            padding: 20px 16px;
            transition: left 0.3s ease;
            overflow-y: auto;
        }
        .mobile-drawer.open {
            left: 0;
        }
        .mobile-drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 20px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }
        .mobile-drawer-header .logo {
            font-size: 18px;
        }
        .mobile-drawer-close {
            background: none;
            border: none;
            font-size: 20px;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 4px;
        }
        .mobile-drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 0;
            margin-bottom: 20px;
        }
        .mobile-drawer-nav a {
            padding: 12px 10px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .mobile-drawer-nav a:hover,
        .mobile-drawer-nav a.active {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .mobile-drawer-nav a.active {
            font-weight: 600;
        }
        .mobile-drawer-cta {
            margin-top: 8px;
        }
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1999;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-bar {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            padding: 10px 0;
            font-size: 13px;
            color: var(--text-muted);
        }
        .breadcrumb-bar .container {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .breadcrumb-bar a {
            color: var(--text-secondary);
        }
        .breadcrumb-bar a:hover {
            color: var(--primary);
        }
        .breadcrumb-separator {
            color: var(--text-muted);
            font-size: 12px;
        }

        /* ===== 分类首屏（紧凑横向条幅） ===== */
        .cat-hero {
            background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
            padding: 40px 0 44px;
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .cat-hero::before {
            content: '';
            position: absolute;
            top: -40px;
            left: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(30, 90, 168, 0.06);
            pointer-events: none;
        }
        .cat-hero .container {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cat-hero-left {
            padding-right: 12px;
        }
        .cat-hero-left h1 {
            font-size: 34px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cat-hero-left h1 .highlight {
            color: var(--primary);
        }
        .cat-hero-left .cat-hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.75;
            max-width: 520px;
        }
        .cat-hero-right {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: #FFFFFF;
            border: 1px solid var(--border);
        }
        .cat-hero-right img {
            width: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            border-radius: 0;
        }

        /* ===== 分类说明面板 ===== */
        .cat-explain {
            background: #FFFFFF;
            border-left: 4px solid var(--primary);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 24px 28px;
            margin-bottom: 32px;
            box-shadow: var(--shadow-sm);
        }
        .cat-explain p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 精选数据卡 ===== */
        .data-mini-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .data-mini-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
        }
        .data-mini-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .data-mini-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-mono);
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .data-mini-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ===== 内容卡片列表 ===== */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px 20px;
        }
        .article-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .article-card .cover-img-wrap {
            margin-bottom: 0;
            border-radius: 0;
        }
        .article-card .cover-img {
            border-radius: 0;
            aspect-ratio: 16/9;
        }
        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .article-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .article-card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .article-card-meta i {
            margin-right: 4px;
            font-size: 12px;
        }

        .list-more-wrap {
            text-align: center;
            margin-top: 36px;
        }
        .list-more-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            background: #FFFFFF;
            color: var(--primary);
            font-weight: 600;
            border: 1px solid var(--border);
            transition: var(--transition);
            font-size: 15px;
        }
        .list-more-link:hover {
            background: var(--primary-soft);
            border-color: var(--primary-light);
            color: var(--primary-dark);
        }

        /* ===== 快捷入口条 ===== */
        .quick-links {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .quick-link-item {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 18px 20px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            cursor: pointer;
        }
        .quick-link-item:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .quick-link-item i {
            font-size: 20px;
            color: var(--primary);
            width: 28px;
            text-align: center;
        }
        .quick-link-item span {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
        }

        /* ===== FAQ 组件 ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border);
        }
        .faq-item {
            padding: 20px 0;
            border-bottom: 1px solid var(--border);
        }
        .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            padding-left: 16px;
            border-left: 3px solid var(--primary);
            margin-bottom: 8px;
        }
        .faq-answer {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            padding-left: 19px;
        }

        /* ===== 底部返回区 ===== */
        .back-section {
            background: linear-gradient(135deg, #EAF0F7 0%, #F5F7FA 100%);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            border: 1px solid var(--border);
        }
        .back-section-text {
            flex: 1;
            min-width: 240px;
        }
        .back-section-text h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .back-section-text p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #1A2635;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            flex-shrink: 0;
        }
        .site-footer .container {
            max-width: 1200px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            font-size: 20px;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .footer-brand .logo-text {
            color: #FFFFFF;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 280px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 44px;
            }
            .main-nav a {
                padding: 0 10px;
                font-size: 14px;
            }
            .main-nav a::after {
                left: 10px;
                right: 10px;
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .quick-links {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 28px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .cat-hero .container {
                grid-template-columns: 1.2fr 1fr;
                gap: 28px;
            }
            .cat-hero-left h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 36px;
                --header-height: 60px;
            }
            .promo-bar {
                font-size: 11px;
                height: 32px;
            }
            .promo-bar-right a {
                font-size: 11px;
            }
            .main-nav {
                display: none;
            }
            .nav-actions .icon-btn {
                display: none;
            }
            .nav-actions .nav-cta {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .cat-hero {
                padding: 28px 0 32px;
            }
            .cat-hero .container {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cat-hero-left h1 {
                font-size: 24px;
            }
            .cat-hero-left .cat-hero-desc {
                font-size: 15px;
            }
            .cat-hero-right {
                order: -1;
                max-width: 360px;
            }
            .data-mini-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .quick-links {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .back-section {
                flex-direction: column;
                text-align: center;
                padding: 28px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 32px;
            }
            .section-title {
                font-size: 22px;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .footer-brand {
                grid-column: auto;
            }
            .promo-bar-right a {
                font-size: 10px;
            }
            .promo-bar-left span {
                font-size: 10px;
            }
            .cat-hero-left h1 {
                font-size: 22px;
            }
            .data-mini-num {
                font-size: 26px;
            }
            .back-section-text h2 {
                font-size: 20px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 56px;
            --header-height: 72px;
            --promo-height: 36px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-sans);
            letter-spacing: -0.5px;
            margin-top: 0;
            line-height: 1.35;
        }

        p {
            margin-top: 0;
        }

        ul, ol {
            padding-left: 20px;
            margin-top: 0;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background-color: var(--bg);
        }
        .section-white {
            background-color: #FFFFFF;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header .section-title {
            margin-bottom: 8px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }
        .badge-blue {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }
        .badge-gray {
            background-color: rgba(139, 148, 165, 0.15);
            color: var(--text-secondary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: #FFFFFF;
        }
        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .text-link:hover::after {
            width: 100%;
        }
        .text-link:hover {
            color: var(--primary-dark);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        /* Promo bar */
        .promo-bar {
            background-color: #143C6B;
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            height: var(--promo-height);
            display: flex;
            align-items: center;
            position: sticky;
            top: 0;
            z-index: 1002;
        }
        .promo-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }
        .promo-bar a {
            color: #FFFFFF;
            font-weight: 600;
            font-size: 12px;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .promo-bar a:hover {
            color: #B8D4F0;
        }
        .promo-label {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .promo-label i {
            font-size: 10px;
            color: #6FCF97;
        }

        /* Header */
        .site-header {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: var(--promo-height);
            z-index: 1000;
            height: var(--header-height);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .logo-icon {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--accent-green);
            flex-shrink: 0;
            margin-right: 2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0;
            flex-grow: 1;
            justify-content: center;
        }
        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 20px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 3px 3px 0 0;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-icon-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: none;
            background: transparent;
            color: var(--text-secondary);
            font-size: 16px;
            cursor: pointer;
            transition: var(--transition);
        }
        .header-icon-btn:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .header-cta {
            padding: 8px 16px;
            font-size: 14px;
            min-width: auto;
            border-radius: var(--radius-sm);
        }
        .mobile-menu-toggle {
            display: none;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 6px;
            border: none;
            background: transparent;
            color: var(--text-main);
            font-size: 20px;
            cursor: pointer;
        }
        .mobile-menu-toggle:hover {
            background-color: var(--primary-soft);
        }
        .mobile-menu {
            display: none;
            position: absolute;
            top: var(--header-height);
            left: 0;
            right: 0;
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            z-index: 999;
            padding: 8px 20px 20px;
        }
        .mobile-menu a {
            display: block;
            padding: 12px 0;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: var(--primary);
        }
        .mobile-menu a:last-child {
            border-bottom: none;
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            padding: 16px 0 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            list-style: none;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb a {
            color: var(--text-muted);
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            font-size: 12px;
            margin-left: 4px;
        }
        .breadcrumb li:last-child {
            color: var(--primary);
            font-weight: 600;
        }

        /* Category hero */
        .category-hero {
            background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
            padding: 36px 0;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 220px;
            height: 220px;
            background: rgba(30, 90, 168, 0.06);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero-inner {
            display: flex;
            align-items: center;
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .category-hero-content {
            flex: 1 1 55%;
        }
        .category-hero-content h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .category-hero-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 540px;
            margin-bottom: 0;
        }
        .category-hero-image {
            flex: 0 0 38%;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .category-hero-image img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: var(--radius-md);
        }

        /* Content cards grid */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px 20px;
        }
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .content-card-image {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
            aspect-ratio: 16 / 9;
        }
        .content-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
            border-radius: 0;
        }
        .content-card:hover .content-card-image img {
            transform: scale(1.02);
        }
        .content-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 1;
        }
        .content-card-body {
            padding: 18px 20px 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.45;
        }
        .content-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 14px;
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }
        .content-card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .content-card-meta i {
            font-size: 12px;
        }
        .content-card-arrow {
            font-size: 14px;
            color: var(--primary);
            transition: transform 0.2s ease;
        }
        .content-card:hover .content-card-arrow {
            transform: translateX(3px);
        }

        /* Category description panel */
        .desc-panel {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 32px;
            border-left: 4px solid var(--primary);
        }
        .desc-panel h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .desc-panel p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 12px;
        }
        .desc-panel p:last-child {
            margin-bottom: 0;
        }

        /* Stat cards */
        .stat-card-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            text-align: center;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-card-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .stat-card-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
            line-height: 1.5;
        }
        .stat-card-sub {
            font-size: 12px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Quick links */
        .quick-links-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .quick-link-item {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 14px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .quick-link-item i {
            color: var(--primary);
            font-size: 14px;
        }
        .quick-link-item:hover {
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        /* FAQ simple */
        .faq-simple {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .faq-simple-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            border-left: 3px solid var(--primary);
            transition: var(--transition);
        }
        .faq-simple-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .faq-simple-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .faq-simple-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Bottom return */
        .return-zone {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 40px 32px;
            text-align: center;
            border: 1px solid var(--border);
        }
        .return-zone h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .return-zone p {
            font-size: 15px;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }
        .return-zone .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* Footer */
        .site-footer {
            background-color: #1A2635;
            color: rgba(255, 255, 255, 0.75);
            padding-top: 56px;
            margin-top: 0;
        }
        .site-footer .container {
            padding-bottom: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
        }
        .footer-brand .logo {
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
        }
        .footer-brand .logo-text {
            color: #FFFFFF;
        }
        .footer-brand .logo-icon {
            background-color: var(--accent-green);
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding: 16px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .faq-simple {
                grid-template-columns: 1fr;
            }
            .stat-card-row {
                grid-template-columns: repeat(3, 1fr);
            }
            .category-hero-inner {
                gap: 28px;
            }
            .category-hero-content h1 {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .main-nav a {
                padding: 20px 10px;
                font-size: 14px;
            }
            .header-cta {
                padding: 8px 12px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 40px;
                --header-height: 64px;
            }
            .main-nav {
                display: none;
            }
            .mobile-menu-toggle {
                display: inline-flex;
            }
            .header-cta {
                display: none;
            }
            .header-actions {
                gap: 8px;
            }
            .category-hero {
                padding: 28px 0;
            }
            .category-hero-inner {
                flex-direction: column;
                gap: 20px;
            }
            .category-hero-image {
                flex: 1 1 auto;
                width: 100%;
            }
            .category-hero-image img {
                height: 180px;
            }
            .category-hero-content h1 {
                font-size: 26px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stat-card-row {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .faq-simple {
                grid-template-columns: 1fr;
            }
            .quick-links-row {
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }
            .section-title {
                font-size: 24px;
            }
            .desc-panel {
                padding: 24px 20px;
            }
            .return-zone {
                padding: 28px 20px;
            }
            .promo-bar .promo-text {
                font-size: 11px;
            }
        }

        @media (max-width: 520px) {
            :root {
                --section-gap: 32px;
                --promo-height: 32px;
            }
            .promo-bar {
                font-size: 11px;
            }
            .promo-bar .promo-text {
                font-size: 11px;
                letter-spacing: 0;
            }
            .category-hero-content h1 {
                font-size: 22px;
            }
            .card-grid {
                gap: 16px;
            }
            .content-card-body {
                padding: 14px 16px 16px;
            }
            .stat-card-number {
                font-size: 26px;
            }
            .return-zone .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .return-zone .btn {
                width: 100%;
                max-width: 280px;
            }
            .quick-link-item {
                padding: 10px 16px;
                font-size: 13px;
            }
            .container {
                padding: 0 16px;
            }
        }

/* roulang page: category3 */
:root {
      --primary: #1E5AA8;
      --primary-dark: #164A8A;
      --primary-light: #4A8BC2;
      --primary-soft: rgba(30, 90, 168, 0.08);
      --bg: #F5F7FA;
      --bg-card: #FFFFFF;
      --accent-green: #2E7D5B;
      --accent-red: #C1553B;
      --text-main: #1F2933;
      --text-secondary: #5B6572;
      --text-muted: #8A94A5;
      --border: #E8EBF0;
      --border-input: #D9E0E8;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 12px;
      --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
      --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
      --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
      --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
      --transition: all 0.2s ease;
      --section-gap: 56px;
      --header-height: 72px;
      --promo-height: 36px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }
    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-main);
      background-color: var(--bg);
      overflow-x: hidden;
    }
    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }
    a:hover {
      color: var(--primary-dark);
    }
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: var(--radius-sm);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
      border-radius: var(--radius-md);
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section {
      padding: var(--section-gap) 0;
    }
    .section-alt {
      background-color: var(--bg);
    }
    .section-white {
      background-color: #FFFFFF;
    }
    .section-title {
      font-size: 28px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.35;
    }
    .section-subtitle {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 680px;
    }
    .section-header {
      margin-bottom: 36px;
    }
    .section-header .section-title {
      margin-bottom: 8px;
    }
    .section-header .section-subtitle {
      margin-bottom: 0;
    }
    .badge {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      line-height: 1.4;
      letter-spacing: 0.3px;
    }
    .badge-green {
      background-color: rgba(46, 125, 91, 0.12);
      color: var(--accent-green);
    }
    .badge-blue {
      background-color: var(--primary-soft);
      color: var(--primary);
    }
    .badge-red {
      background-color: rgba(193, 85, 59, 0.12);
      color: var(--accent-red);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.5;
      cursor: pointer;
      transition: var(--transition);
      border: 2px solid transparent;
      text-align: center;
      min-width: 140px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #FFFFFF;
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      color: #FFFFFF;
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
    }
    .btn-secondary {
      background-color: #FFFFFF;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-secondary:hover {
      background-color: var(--primary-soft);
      color: var(--primary);
      transform: translateY(-1px);
    }
    .btn-outline-light {
      background-color: transparent;
      color: #FFFFFF;
      border-color: rgba(255, 255, 255, 0.6);
    }
    .btn-outline-light:hover {
      background-color: rgba(255, 255, 255, 0.12);
      color: #FFFFFF;
      border-color: #FFFFFF;
    }
    .text-link {
      color: var(--primary);
      font-weight: 500;
      position: relative;
      display: inline-block;
    }
    .text-link::after {
      content: '';
      position: absolute;
      bottom: -2px;
      left: 0;
      width: 0;
      height: 2px;
      background-color: var(--primary);
      transition: var(--transition);
    }
    .text-link:hover::after {
      width: 100%;
    }
    .text-link:hover {
      color: var(--primary-dark);
    }
    .card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    /* 导航与促销条 */
    .promo-bar {
      background-color: #143C6B;
      color: rgba(255, 255, 255, 0.9);
      font-size: 12px;
      min-height: var(--promo-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      position: relative;
      z-index: 1001;
    }
    .promo-bar .promo-left {
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .promo-bar .promo-link {
      color: #FFFFFF;
      font-weight: 600;
      margin-left: 16px;
    }
    .promo-bar .promo-link:hover {
      color: var(--primary-light);
    }
    .site-header {
      background-color: #FFFFFF;
      border-bottom: 1px solid var(--border);
      height: var(--header-height);
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--primary);
      font-size: 20px;
      font-weight: 700;
      letter-spacing: -0.5px;
      white-space: nowrap;
    }
    .logo-icon {
      display: inline-block;
      width: 8px;
      height: 8px;
      background-color: var(--accent-green);
      border-radius: 50%;
      margin-right: 4px;
    }
    .logo-text {
      color: var(--primary);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .main-nav a {
      position: relative;
      padding: 0 12px;
      height: var(--header-height);
      display: flex;
      align-items: center;
      color: var(--text-secondary);
      font-weight: 500;
      font-size: 15px;
      transition: var(--transition);
    }
    .main-nav a:hover {
      color: var(--primary);
    }
    .main-nav a.active {
      color: var(--primary);
    }
    .main-nav a.active::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 12px;
      right: 12px;
      height: 3px;
      background-color: var(--primary);
      border-radius: 3px 3px 0 0;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .icon-btn {
      background: none;
      border: none;
      color: var(--text-secondary);
      font-size: 18px;
      cursor: pointer;
      transition: var(--transition);
      padding: 4px;
    }
    .icon-btn:hover {
      color: var(--primary);
    }
    .hamburger {
      display: none;
      background: none;
      border: none;
      color: var(--primary);
      font-size: 22px;
      cursor: pointer;
    }
    .mobile-drawer {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      width: 280px;
      max-width: 80%;
      height: 100vh;
      background: #FFFFFF;
      box-shadow: 2px 0 16px rgba(0,0,0,0.15);
      z-index: 2000;
      padding: 20px;
      transform: translateX(-100%);
      transition: transform 0.3s ease;
      overflow-y: auto;
    }
    .mobile-drawer.open {
      transform: translateX(0);
    }
    .mobile-drawer .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
    }
    .mobile-drawer .drawer-close {
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-secondary);
      cursor: pointer;
    }
    .mobile-drawer .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }
    .mobile-drawer .drawer-nav a {
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-weight: 500;
    }
    .mobile-drawer .drawer-nav a.active {
      background-color: var(--primary-soft);
      color: var(--primary);
    }
    /* 分类页首屏 */
    .category-hero {
      background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
      padding: 32px 0 40px;
    }
    .breadcrumb {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 16px;
    }
    .breadcrumb a {
      color: var(--text-secondary);
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb span {
      margin: 0 4px;
    }
    .category-hero-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      align-items: center;
    }
    .category-hero-text h1 {
      font-size: 32px;
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .category-hero-text .hero-desc {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
    }
    .category-hero-image {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .category-hero-image img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      border-radius: var(--radius-md);
    }
    /* 列表卡片 */
    .content-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .content-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .content-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .content-card .card-image {
      position: relative;
      aspect-ratio: 16/9;
      overflow: hidden;
      border-radius: var(--radius-md) var(--radius-md) 0 0;
    }
    .content-card .card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
      border-radius: 0;
    }
    .content-card:hover .card-image img {
      transform: scale(1.03);
    }
    .content-card .card-badge {
      position: absolute;
      top: 10px;
      left: 10px;
      background: var(--primary);
      color: #FFFFFF;
      padding: 4px 10px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
    }
    .content-card .card-body {
      padding: 18px 20px 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .content-card .card-title {
      font-size: 18px;
      font-weight: 600;
      line-height: 1.45;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .content-card .card-summary {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 16px;
    }
    .content-card .card-meta {
      margin-top: auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      color: var(--text-muted);
      border-top: 1px solid var(--border);
      padding-top: 12px;
    }
    .content-card .card-meta .meta-left {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .content-card .card-meta i {
      margin-right: 4px;
    }
    .content-card .card-arrow {
      color: var(--primary);
      font-size: 18px;
    }
    .view-more {
      text-align: center;
      margin-top: 32px;
    }
    /* 说明面板 */
    .explain-panel {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .explain-panel h2 {
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .explain-panel p {
      color: var(--text-secondary);
      line-height: 1.8;
    }
    /* 精选数据卡 */
    .data-cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .data-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .data-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .data-card .data-number {
      font-family: var(--font-mono);
      font-size: 32px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 8px;
    }
    .data-card .data-label {
      font-size: 14px;
      color: var(--text-secondary);
    }
    /* 快捷入口条 */
    .quick-links {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      padding: 20px 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 20px;
    }
    .quick-links .quick-title {
      font-weight: 600;
      color: var(--text-main);
      margin-right: 8px;
      white-space: nowrap;
    }
    .quick-links a {
      padding: 8px 16px;
      border-radius: 20px;
      background: var(--bg);
      color: var(--text-secondary);
      font-size: 14px;
      font-weight: 500;
      transition: var(--transition);
    }
    .quick-links a:hover {
      background: var(--primary-soft);
      color: var(--primary);
    }
    /* FAQ 简版 */
    .faq-list {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }
    .faq-item {
      margin-bottom: 24px;
    }
    .faq-item:last-child {
      margin-bottom: 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 16px;
      color: var(--text-main);
      padding-left: 12px;
      border-left: 3px solid var(--primary);
      margin-bottom: 8px;
    }
    .faq-answer {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      padding-left: 15px;
    }
    /* 底部返回区 */
    .bottom-return {
      text-align: center;
      padding: 48px 20px;
      background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
      border-radius: var(--radius-lg);
    }
    .bottom-return .return-title {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .bottom-return p {
      color: var(--text-secondary);
      margin-bottom: 20px;
    }
    /* 页脚 */
    .site-footer {
      background-color: #1A2635;
      color: rgba(255, 255, 255, 0.75);
      padding: 48px 0 0;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 32px;
    }
    .footer-brand .logo {
      color: #FFFFFF;
      margin-bottom: 12px;
    }
    .footer-brand .logo-text {
      color: #FFFFFF;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.65);
    }
    .footer-col h4 {
      font-size: 16px;
      font-weight: 600;
      color: #FFFFFF;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul li a {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
      transition: var(--transition);
    }
    .footer-col ul li a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 16px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: rgba(255, 255, 255, 0.5);
      flex-wrap: wrap;
      gap: 8px;
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .main-nav {
        display: none;
      }
      .hamburger {
        display: block;
      }
      .header-actions .icon-btn.hide-mobile {
        display: none;
      }
      .category-hero-inner {
        grid-template-columns: 1fr;
      }
      .content-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .data-cards {
        grid-template-columns: repeat(2, 1fr);
      }
    }
    @media (max-width: 640px) {
      .section {
        padding: 40px 0;
      }
      .content-grid {
        grid-template-columns: 1fr;
      }
      .data-cards {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .promo-bar .promo-left {
        font-size: 11px;
      }
      .promo-bar .promo-link {
        font-size: 11px;
      }
      .category-hero-text h1 {
        font-size: 26px;
      }
      .category-hero-image img {
        height: 180px;
      }
      .quick-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
      }
      .quick-links .quick-title {
        margin-right: 0;
      }
    }
    /* 抽屉遮罩 */
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.4);
      z-index: 1999;
      display: none;
    }
    .drawer-overlay.open {
      display: block;
    }

/* roulang page: category4 */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 56px;
            --header-height: 72px;
            --promo-height: 36px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }
        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background-color: var(--bg);
        }
        .section-white {
            background-color: #FFFFFF;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header .section-title {
            margin-bottom: 8px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }
        .badge-blue {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: #FFFFFF;
        }
        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .text-link:hover::after {
            width: 100%;
        }
        .text-link:hover {
            color: var(--primary-dark);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        /* Promo bar */
        .promo-bar {
            background-color: #143C6B;
            color: rgba(255, 255, 255, 0.9);
            font-size: 12px;
            height: var(--promo-height);
            display: flex;
            align-items: center;
            position: relative;
            z-index: 100;
        }
        .promo-bar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .promo-bar a {
            color: #FFFFFF;
            font-weight: 500;
            font-size: 12px;
        }
        .promo-bar a:hover {
            color: rgba(255, 255, 255, 0.75);
        }
        /* Header / Nav */
        .site-header {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 90;
            box-shadow: 0 1px 4px rgba(30, 90, 168, 0.04);
        }
        .main-nav {
            height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background-color: var(--accent-green);
            display: inline-block;
            flex-shrink: 0;
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
            flex: 1;
            justify-content: center;
        }
        .nav-links li {
            margin: 0;
        }
        .nav-links a {
            display: block;
            padding: 10px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-bottom: 3px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a.active {
            color: var(--primary);
            border-bottom-color: var(--primary);
            font-weight: 600;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-icon {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 16px;
            transition: var(--transition);
            cursor: pointer;
            background: transparent;
            border: none;
        }
        .nav-icon:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .nav-cta {
            padding: 8px 18px;
            font-size: 13px;
            min-width: auto;
            border-radius: 6px;
        }
        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-main);
            cursor: pointer;
            padding: 6px;
            line-height: 1;
        }
        /* Drawer for mobile */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: -280px;
            width: 280px;
            height: 100vh;
            background-color: #FFFFFF;
            z-index: 200;
            box-shadow: 2px 0 24px rgba(0, 0, 0, 0.15);
            transition: left 0.25s ease;
            overflow-y: auto;
            padding: 24px 20px;
        }
        .mobile-drawer.open {
            left: 0;
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 150;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.25s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 24px;
        }
        .drawer-close {
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-secondary);
            cursor: pointer;
            line-height: 1;
        }
        .drawer-nav {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .drawer-nav li {
            border-bottom: 1px solid var(--border);
        }
        .drawer-nav a {
            display: block;
            padding: 14px 4px;
            font-size: 16px;
            color: var(--text-main);
            font-weight: 500;
        }
        .drawer-nav a:hover,
        .drawer-nav a.active {
            color: var(--primary);
        }
        .drawer-cta {
            margin-top: 24px;
            width: 100%;
        }
        /* Breadcrumb */
        .breadcrumb-wrap {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            list-style: none;
            padding: 0;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb li:not(:last-child)::after {
            content: '/';
            color: var(--text-muted);
            font-size: 13px;
            margin-left: 4px;
        }
        .breadcrumb a {
            color: var(--text-secondary);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }
        /* Category Hero (compact banner) */
        .category-hero {
            background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
            padding: 48px 0;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: rgba(30, 90, 168, 0.06);
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero-grid {
            display: grid;
            grid-template-columns: 1fr 380px;
            gap: 40px;
            align-items: center;
        }
        .category-hero-content .category-tag {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .category-hero-content h1 {
            font-size: 36px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .category-hero-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 540px;
            margin-bottom: 0;
        }
        .category-hero-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .category-hero-image img {
            width: 100%;
            height: 260px;
            object-fit: cover;
            border-radius: var(--radius-lg);
        }
        /* Stats strip */
        .stats-strip {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .stat-icon {
            width: 48px;
            height: 48px;
            border-radius: 10px;
            background: var(--primary-soft);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .stat-icon.green {
            background: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }
        .stat-icon.red {
            background: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }
        .stat-info {
            flex: 1;
        }
        .stat-value {
            font-family: var(--font-mono);
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-value.green-num {
            color: var(--accent-green);
        }
        .stat-value.red-num {
            color: var(--accent-red);
        }
        .stat-label {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.4;
        }
        /* Article list */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .article-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .article-card-image {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 0;
            transition: transform 0.3s ease;
        }
        .article-card:hover .article-card-image img {
            transform: scale(1.02);
        }
        .article-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: var(--primary);
            color: #FFFFFF;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }
        .article-card-tag.green {
            background: var(--accent-green);
        }
        .article-card-tag.red {
            background: var(--accent-red);
        }
        .article-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .article-card-title {
            font-size: 17px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .article-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }
        .article-card-meta .meta-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-card-meta .meta-views {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .article-card-meta .meta-arrow {
            margin-left: auto;
            color: var(--primary);
            font-size: 15px;
        }
        .view-more-wrap {
            text-align: center;
            margin-top: 32px;
        }
        /* Category description panel */
        .category-desc-panel {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 36px 40px;
            border: 1px solid var(--border);
        }
        .category-desc-panel p {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .category-desc-panel p:last-child {
            margin-bottom: 0;
        }
        .category-desc-panel strong {
            color: var(--primary);
            font-weight: 600;
        }
        /* Quick links */
        .quick-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .quick-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 30px;
            padding: 10px 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }
        .quick-link:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-soft);
        }
        .quick-link i {
            font-size: 13px;
            color: var(--primary);
        }
        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 10px;
            padding-left: 14px;
            border-left: 3px solid var(--primary);
            line-height: 1.6;
        }
        .faq-answer {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            padding-left: 17px;
            margin: 0;
        }
        /* Bottom CTA */
        .bottom-cta {
            background: linear-gradient(135deg, #1E5AA8 0%, #164A8A 100%);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
            color: #FFFFFF;
        }
        .bottom-cta h2 {
            font-size: 26px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .bottom-cta p {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            max-width: 480px;
            margin-left: auto;
            margin-right: auto;
        }
        .bottom-cta .btn {
            min-width: 180px;
        }
        /* Footer */
        .site-footer {
            background-color: #1A2635;
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 40px;
        }
        .footer-brand .logo {
            color: #FFFFFF;
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand .logo:hover {
            color: rgba(255, 255, 255, 0.85);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 0;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
            letter-spacing: 0.2px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: #FFFFFF;
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 16px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.55);
        }
        .footer-bottom span {
            display: inline-block;
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 10px 8px;
                font-size: 14px;
            }
            .category-hero-grid {
                grid-template-columns: 1fr 300px;
                gap: 24px;
            }
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-strip {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 40px;
                --header-height: 60px;
            }
            .promo-bar .container {
                flex-direction: column;
                gap: 0;
                justify-content: center;
                font-size: 11px;
            }
            .promo-bar .promo-text-mobile {
                display: block;
            }
            .promo-bar .promo-text-desktop {
                display: none;
            }
            .nav-links {
                display: none;
            }
            .nav-actions {
                display: none;
            }
            .hamburger {
                display: block;
            }
            .main-nav {
                justify-content: space-between;
            }
            .category-hero {
                padding: 32px 0;
            }
            .category-hero-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .category-hero-content h1 {
                font-size: 28px;
            }
            .category-hero-image {
                display: none;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .stats-strip {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .stat-card {
                padding: 16px 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
                padding-bottom: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .category-desc-panel {
                padding: 24px 20px;
            }
            .bottom-cta {
                padding: 32px 20px;
            }
            .bottom-cta h2 {
                font-size: 22px;
            }
        }
        @media (max-width: 520px) {
            .section-title {
                font-size: 22px;
            }
            .category-hero-content h1 {
                font-size: 24px;
            }
            .article-card-title {
                font-size: 15px;
            }
            .btn {
                min-width: 120px;
                padding: 10px 16px;
                font-size: 14px;
            }
            .container {
                padding: 0 16px;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 64px;
            --header-height: 72px;
            --promo-height: 36px;
        }

        * {
            box-sizing: border-box;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
            margin: 0;
        }

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

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

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

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

        .section-white {
            background-color: #FFFFFF;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header .section-title {
            margin-bottom: 8px;
        }

        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }

        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }

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

        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }

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

        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }

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

        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }

        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }

        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: #FFFFFF;
        }

        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }

        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }

        .text-link:hover::after {
            width: 100%;
        }

        .text-link:hover {
            color: var(--primary-dark);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 24px;
            transition: var(--transition);
        }

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

        /* 顶部促销条 */
        .promo-bar {
            height: var(--promo-height);
            background-color: #143C6B;
            color: #D9E4F5;
            font-size: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            z-index: 100;
        }

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

        .promo-left {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .promo-right a {
            color: #FFFFFF;
            font-weight: 500;
            text-decoration: underline;
            white-space: nowrap;
        }

        .promo-right a:hover {
            color: #D9E4F5;
        }

        /* 主导航 */
        .site-header {
            background-color: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 99;
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .main-nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            height: 100%;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 700;
            color: var(--text-main);
            white-space: nowrap;
        }

        .logo-icon {
            display: inline-block;
            width: 12px;
            height: 12px;
            background-color: var(--accent-green);
            border-radius: 50%;
            margin-right: 4px;
        }

        .logo-text {
            color: var(--primary);
            letter-spacing: -0.5px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            height: 100%;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            height: 100%;
            padding: 0 12px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 12px;
            right: 12px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 3px 3px 0 0;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .nav-icon-btn {
            background: none;
            border: none;
            font-size: 18px;
            color: var(--text-secondary);
            cursor: pointer;
            padding: 8px;
            border-radius: 50%;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }

        .nav-icon-btn:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            min-width: auto;
        }

        /* 移动端导航 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: var(--text-main);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .mobile-menu-toggle:hover {
            background-color: var(--primary-soft);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: calc(var(--promo-height) + var(--header-height));
            left: 0;
            width: 280px;
            max-width: 85vw;
            background-color: #FFFFFF;
            box-shadow: var(--shadow-lg);
            z-index: 98;
            padding: 20px;
            flex-direction: column;
            gap: 8px;
            border-radius: 0 0 var(--radius-md) 0;
        }

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

        .mobile-nav a {
            display: block;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
        }

        .mobile-nav a:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
        }

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

        /* 面包屑 */
        .breadcrumb {
            padding: 20px 0 0;
            font-size: 14px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
        }

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

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

        .breadcrumb .current {
            color: var(--text-main);
            font-weight: 500;
        }

        /* 分类页首屏 */
        .category-hero {
            background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
            border-radius: var(--radius-md);
            padding: 36px 40px;
            display: flex;
            align-items: center;
            gap: 40px;
            margin-top: 20px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -40px;
            width: 220px;
            height: 220px;
            background: radial-gradient(circle, rgba(30,90,168,0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .category-hero-content {
            flex: 1;
            position: relative;
            z-index: 1;
        }

        .category-hero-content h1 {
            font-size: 34px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .category-hero-content p {
            font-size: 17px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 0;
            max-width: 560px;
        }

        .category-hero-image {
            flex: 0 0 360px;
            position: relative;
            z-index: 1;
        }

        .category-hero-image img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
        }

        /* 列表卡片区 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

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

        .article-card-image {
            height: 180px;
            overflow: hidden;
            position: relative;
        }

        .article-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .article-card:hover .article-card-image img {
            transform: scale(1.02);
        }

        .article-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .article-card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
            flex: 1;
        }

        .article-card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 12px;
        }

        .article-card-meta .tag {
            background-color: var(--primary-soft);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 12px;
            font-weight: 500;
        }

        .more-link-wrap {
            text-align: center;
            margin-top: 32px;
        }

        .more-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
        }

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

        /* 说明面板 */
        .explanation-panel {
            background-color: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 32px 36px;
            box-shadow: var(--shadow-sm);
            border-left: 4px solid var(--primary);
        }

        .explanation-panel p {
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        /* 数据卡 */
        .data-cards {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .data-card {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            text-align: left;
        }

        .data-card-value {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            font-family: var(--font-mono);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .data-card-label {
            font-size: 14px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* 快捷入口 */
        .quick-links {
            background-color: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 24px 28px;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-wrap: wrap;
            gap: 24px 40px;
            align-items: center;
        }

        .quick-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 500;
            color: var(--primary);
        }

        .quick-links a i {
            font-size: 14px;
            color: var(--primary-light);
        }

        .quick-links a:hover {
            color: var(--primary-dark);
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border-left: 3px solid var(--primary);
        }

        .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .faq-answer {
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
        }

        /* 底部返回区 */
        .return-area {
            background: linear-gradient(135deg, #1E5AA8 0%, #164A8A 100%);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            text-align: center;
            color: #FFFFFF;
        }

        .return-area h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .return-area p {
            font-size: 16px;
            color: rgba(255,255,255,0.85);
            margin-bottom: 24px;
        }

        /* 页脚 */
        .site-footer {
            background-color: #1A2635;
            color: #C0C9D6;
            padding: 56px 0 0;
            margin-top: 64px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .logo {
            color: #FFFFFF;
            margin-bottom: 16px;
            font-size: 24px;
        }

        .footer-brand .logo-text {
            color: #FFFFFF;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #8E9BAA;
            max-width: 280px;
        }

        .footer-col h4 {
            color: #FFFFFF;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            color: #8E9BAA;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: #FFFFFF;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding: 16px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: #6B7888;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .data-cards {
                grid-template-columns: repeat(3, 1fr);
            }
            .category-hero {
                padding: 28px 24px;
                gap: 24px;
            }
            .category-hero-image {
                flex: 0 0 300px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 40px;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .data-cards {
                grid-template-columns: 1fr;
            }
            .category-hero {
                flex-direction: column;
                align-items: stretch;
                gap: 20px;
                padding: 24px 20px;
            }
            .category-hero-content h1 {
                font-size: 28px;
            }
            .category-hero-image {
                flex: 0 0 auto;
                height: 200px;
            }
            .category-hero-image img {
                height: 200px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-links {
                display: none;
            }
            .mobile-menu-toggle {
                display: inline-flex;
            }
            .nav-actions {
                gap: 4px;
            }
            .nav-actions .btn-sm {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .promo-left {
                font-size: 11px;
            }
            .promo-right {
                font-size: 11px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
            .category-hero {
                padding: 20px 16px;
            }
            .category-hero-content h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 24px;
            }
            .btn {
                min-width: 120px;
                padding: 10px 18px;
                font-size: 14px;
            }
            .breadcrumb {
                font-size: 13px;
            }
        }

/* roulang page: category6 */
:root {
            --primary: #1E5AA8;
            --primary-dark: #164A8A;
            --primary-light: #4A8BC2;
            --primary-soft: rgba(30, 90, 168, 0.08);
            --primary-softer: rgba(30, 90, 168, 0.04);
            --bg: #F5F7FA;
            --bg-card: #FFFFFF;
            --accent-green: #2E7D5B;
            --accent-red: #C1553B;
            --accent-amber: #B8892B;
            --text-main: #1F2933;
            --text-secondary: #5B6572;
            --text-muted: #8A94A5;
            --border: #E8EBF0;
            --border-input: #D9E0E8;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 12px;
            --shadow-sm: 0 2px 8px rgba(30, 90, 168, 0.08);
            --shadow-md: 0 8px 24px rgba(30, 90, 168, 0.16);
            --shadow-lg: 0 12px 32px rgba(30, 90, 168, 0.18);
            --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
            --font-mono: "SF Mono", "Cascadia Code", "Roboto Mono", "Noto Sans Mono CJK SC", monospace;
            --transition: all 0.2s ease;
            --section-gap: 64px;
            --header-height: 72px;
            --promo-height: 36px;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg);
            overflow-x: hidden;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: var(--section-gap) 0;
        }
        .section-alt {
            background-color: var(--bg);
        }
        .section-white {
            background-color: #FFFFFF;
        }
        .section-title {
            font-size: 28px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 680px;
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header .section-title {
            margin-bottom: 8px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }
        .badge {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            line-height: 1.4;
            letter-spacing: 0.3px;
        }
        .badge-green {
            background-color: rgba(46, 125, 91, 0.12);
            color: var(--accent-green);
        }
        .badge-blue {
            background-color: var(--primary-soft);
            color: var(--primary);
        }
        .badge-red {
            background-color: rgba(193, 85, 59, 0.12);
            color: var(--accent-red);
        }
        .badge-amber {
            background-color: rgba(184, 137, 43, 0.12);
            color: var(--accent-amber);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.5;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            min-width: 140px;
        }
        .btn-primary {
            background-color: var(--primary);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-dark);
            color: #FFFFFF;
            transform: translateY(-1px);
            box-shadow: 0 6px 16px rgba(30, 90, 168, 0.28);
        }
        .btn-secondary {
            background-color: #FFFFFF;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-secondary:hover {
            background-color: var(--primary-soft);
            color: var(--primary);
            transform: translateY(-1px);
        }
        .btn-outline-light {
            background-color: transparent;
            color: #FFFFFF;
            border-color: rgba(255, 255, 255, 0.6);
        }
        .btn-outline-light:hover {
            background-color: rgba(255, 255, 255, 0.12);
            color: #FFFFFF;
            border-color: #FFFFFF;
        }
        .text-link {
            color: var(--primary);
            font-weight: 500;
            position: relative;
            display: inline-block;
        }
        .text-link::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--primary);
            transition: var(--transition);
        }
        .text-link:hover::after {
            width: 100%;
        }
        .text-link:hover {
            color: var(--primary-dark);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        /* Promo Bar */
        .promo-bar {
            background: #143C6B;
            color: #EAF0F7;
            font-size: 12px;
            height: var(--promo-height);
            line-height: var(--promo-height);
            position: relative;
            z-index: 30;
        }
        .promo-bar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .promo-bar .promo-left {
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .promo-bar .promo-left i {
            font-size: 11px;
            color: #6FA8DC;
        }
        .promo-bar .promo-right a {
            color: #B8D4F0;
            font-weight: 500;
            white-space: nowrap;
        }
        .promo-bar .promo-right a:hover {
            color: #FFFFFF;
        }

        /* Header / Main Nav */
        .site-header {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 20;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }
        .logo-icon {
            display: inline-block;
            width: 10px;
            height: 10px;
            background-color: var(--accent-green);
            border-radius: 50%;
            box-shadow: 0 0 0 3px rgba(46, 125, 91, 0.15);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.3px;
            line-height: 1.2;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }
        .main-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: var(--radius-sm);
            white-space: nowrap;
            position: relative;
            transition: var(--transition);
        }
        .main-nav a:hover {
            color: var(--primary);
            background-color: var(--primary-softer);
        }
        .main-nav a.active {
            color: var(--primary);
            font-weight: 600;
        }
        .main-nav a.active::after {
            content: '';
            position: absolute;
            bottom: -1px;
            left: 14px;
            right: 14px;
            height: 3px;
            background-color: var(--primary);
            border-radius: 3px 3px 0 0;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-actions .icon-btn {
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            color: var(--text-secondary);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 16px;
        }
        .header-actions .icon-btn:hover {
            background-color: var(--primary-softer);
            color: var(--primary);
        }
        .header-actions .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            min-width: auto;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            background: transparent;
            border: none;
            cursor: pointer;
            font-size: 20px;
            color: var(--text-main);
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .hamburger:hover {
            background-color: var(--primary-softer);
            color: var(--primary);
        }

        /* Mobile Drawer */
        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: #FFFFFF;
            z-index: 100;
            box-shadow: 4px 0 24px rgba(0, 0, 0, 0.15);
            padding: 24px 20px;
            overflow-y: auto;
            transform: translateX(-100%);
            transition: transform 0.25s ease;
        }
        .mobile-drawer.open {
            transform: translateX(0);
        }
        .mobile-drawer .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
        }
        .mobile-drawer .drawer-close {
            width: 36px;
            height: 36px;
            background: transparent;
            border: none;
            font-size: 18px;
            cursor: pointer;
            color: var(--text-secondary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .mobile-drawer .drawer-close:hover {
            background: var(--primary-softer);
            color: var(--primary);
        }
        .mobile-drawer nav a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            border-radius: var(--radius-sm);
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .mobile-drawer nav a:hover {
            background: var(--primary-softer);
            color: var(--primary);
        }
        .mobile-drawer nav a.active {
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 600;
        }
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 99;
        }
        .drawer-overlay.show {
            display: block;
        }
        .drawer-footer {
            margin-top: 24px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

        /* Breadcrumb */
        .breadcrumb-wrap {
            background: #FFFFFF;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            color: var(--text-muted);
            list-style: none;
            margin: 0;
            padding: 0;
            flex-wrap: wrap;
        }
        .breadcrumb li {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .breadcrumb li+li::before {
            content: '/';
            color: var(--text-muted);
            font-size: 13px;
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb li:last-child {
            color: var(--text-main);
            font-weight: 500;
        }

        /* Category Hero (Compact) */
        .category-hero {
            background: linear-gradient(135deg, #F5F7FA 0%, #EAF0F7 100%);
            padding: 40px 0;
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            left: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(30, 90, 168, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .container {
            display: flex;
            align-items: center;
            gap: 40px;
            position: relative;
            z-index: 1;
        }
        .category-hero .hero-left {
            flex: 1;
        }
        .category-hero h1 {
            font-size: 32px;
            font-weight: 700;
            letter-spacing: -0.5px;
            color: var(--text-main);
            margin-bottom: 12px;
            line-height: 1.35;
        }
        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 0;
        }
        .category-hero .hero-right {
            flex-shrink: 0;
            width: 320px;
            height: 200px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .category-hero .hero-right img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Content Cards Grid - 2-col layout for this category */
        .content-grid-2col {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .content-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .content-card .card-img-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            border-radius: var(--radius-md) var(--radius-md) 0 0;
        }
        .content-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
            border-radius: 0;
        }
        .content-card:hover .card-img-wrap img {
            transform: scale(1.02);
        }
        .content-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 1;
        }
        .content-card .card-body {
            padding: 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .content-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.45;
            margin-bottom: 8px;
        }
        .content-card .card-summary {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            flex: 1;
        }
        .content-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
            padding-top: 12px;
            border-top: 1px solid var(--border);
        }
        .content-card .card-meta .meta-left {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .content-card .card-meta .arrow-icon {
            color: var(--primary);
            font-size: 14px;
            transition: var(--transition);
        }
        .content-card:hover .card-meta .arrow-icon {
            transform: translateX(3px);
        }
        .load-more-link {
            text-align: center;
            margin-top: 32px;
        }

        /* Category Description Panel */
        .cat-desc-panel {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .cat-desc-panel p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 0;
        }

        /* Mini Data Cards */
        .mini-data-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .mini-data-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border-top: 3px solid transparent;
        }
        .mini-data-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
            border-top-color: var(--primary);
        }
        .mini-data-card .data-number {
            font-family: var(--font-mono);
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .mini-data-card .data-label {
            font-size: 13px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Quick Links Bar */
        .quick-links-bar {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            box-shadow: var(--shadow-sm);
        }
        .quick-links-bar .quick-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            white-space: nowrap;
        }
        .quick-links-bar .quick-links {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .quick-links-bar .quick-links a {
            font-size: 14px;
            color: var(--primary);
            font-weight: 500;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .quick-links-bar .quick-links a:hover {
            color: var(--primary-dark);
            text-decoration: underline;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            box-shadow: var(--shadow-sm);
            border-left: 3px solid var(--primary);
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-item .faq-question {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            line-height: 1.5;
            margin-bottom: 8px;
        }
        .faq-item .faq-answer {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* Bottom Return */
        .bottom-return {
            background: linear-gradient(135deg, #143C6B 0%, #1E5AA8 100%);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: center;
            color: #FFFFFF;
            box-shadow: var(--shadow-lg);
        }
        .bottom-return .return-title {
            font-size: 24px;
            font-weight: 700;
            letter-spacing: -0.3px;
            margin-bottom: 8px;
            color: #FFFFFF;
        }
        .bottom-return .return-desc {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: 24px;
        }

        /* Footer */
        .site-footer {
            background: #1A2635;
            color: #C5CDD8;
            padding: 48px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }
        .footer-brand .logo {
            margin-bottom: 12px;
        }
        .footer-brand .logo-text {
            color: #FFFFFF;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A8B2C0;
            margin-bottom: 0;
            max-width: 280px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 14px;
            letter-spacing: 0.2px;
        }
        .footer-col ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: #A8B2C0;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: #FFFFFF;
            text-decoration: underline;
        }
        .footer-bottom {
            background: #111A26;
            padding: 16px 0;
            font-size: 12px;
            color: #7A8798;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .main-nav a {
                padding: 8px 8px;
                font-size: 14px;
            }
            .content-grid-2col {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .category-hero .hero-right {
                width: 260px;
                height: 170px;
            }
            .mini-data-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 56px;
            }
            .main-nav {
                display: none;
            }
            .hamburger {
                display: inline-flex;
            }
            .header-actions .btn-sm {
                display: none;
            }
            .mobile-drawer {
                display: block;
            }
            .category-hero .container {
                flex-direction: column;
                align-items: flex-start;
                gap: 24px;
            }
            .category-hero .hero-right {
                width: 100%;
                height: 200px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .mini-data-grid {
                grid-template-columns: 1fr;
            }
            .quick-links-bar {
                flex-direction: column;
                align-items: flex-start;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .promo-bar .promo-left span.promo-text {
                display: none;
            }
            .promo-bar .promo-left span.promo-short {
                display: inline;
            }
            .site-header .container {
                gap: 8px;
            }
        }
        @media (max-width: 520px) {
            :root {
                --section-gap: 40px;
            }
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 24px;
            }
            .category-hero {
                padding: 28px 0;
            }
            .category-hero h1 {
                font-size: 22px;
            }
            .content-card .card-body {
                padding: 16px 18px;
            }
            .cat-desc-panel {
                padding: 24px 20px;
            }
            .bottom-return {
                padding: 32px 20px;
            }
            .bottom-return .return-title {
                font-size: 20px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (min-width: 769px) {
            .promo-bar .promo-left span.promo-short {
                display: none;
            }
        }