/* roulang page: index */
:root {
            --bg: #F5F8FB;
            --surface: #FFFFFF;
            --primary: #17517C;
            --primary-soft: #EAF1F8;
            --accent: #E8742A;
            --success: #2F9E6E;
            --text: #1E2A32;
            --text-secondary: #5B6B7A;
            --border: #E3EAF0;
            --shadow-card: 0 2px 12px rgba(23, 81, 124, 0.08);
            --shadow-card-hover: 0 6px 24px rgba(23, 81, 124, 0.14);
            --radius: 12px;
            --radius-btn: 8px;
            --space-section: 80px;
            --font-family: "PingFang SC", "Microsoft YaHei", -apple-system, "Helvetica Neue", Arial, sans-serif;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text);
            font-size: 16px;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; display: block; }
        a { text-decoration: none; color: var(--primary); transition: color 0.2s; }
        a:hover { color: #0e3a5c; }
        ul, ol { list-style: none; }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input { font-family: inherit; }

        .container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all 0.25s ease;
            border: 1px solid transparent;
            line-height: 1.2;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(23, 81, 124, 0.18);
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
        }
        .btn-primary:hover {
            background: #d15f1f;
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(232, 116, 42, 0.25);
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: none;
        }
        .btn-outline {
            background: transparent;
            border-color: var(--primary);
            color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .btn-outline:active {
            transform: translateY(1px);
        }
        .btn-lg { min-height: 48px; padding: 0 36px; font-size: 16px; }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            transition: gap 0.2s;
        }
        .text-link:hover { gap: 10px; color: var(--primary); }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 64px;
            background: transparent;
            transition: background 0.3s, box-shadow 0.3s;
        }
        .site-header.scrolled {
            background: var(--surface);
            box-shadow: var(--shadow-card);
        }
        .nav-container {
            max-width: 1200px;
            margin: 0 auto;
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            position: relative;
        }
        .nav-left {
            display: flex;
            align-items: center;
            gap: 28px;
            height: 100%;
            position: relative;
            padding-right: 28px;
        }
        .nav-left::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            height: 24px;
            width: 1px;
            background: var(--border);
        }
        .logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
        }
        .logo-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .main-nav a {
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 2px;
            position: relative;
            white-space: nowrap;
            transition: color 0.2s;
        }
        .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;
            left: 0;
            right: 0;
            bottom: -2px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 20px;
            position: relative;
            padding-left: 20px;
        }
        .nav-right::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            height: 24px;
            width: 1px;
            background: var(--border);
        }
        .nav-right .btn-cta {
            min-height: 36px;
            padding: 0 18px;
            font-size: 14px;
        }
        .search-btn {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-btn);
            color: var(--primary);
            font-size: 16px;
            transition: background 0.2s;
        }
        .search-btn:hover { background: var(--primary-soft); }
        .search-btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .hamburger {
            display: none;
            width: 40px;
            height: 40px;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: 8px;
        }
        .hamburger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: all 0.3s;
        }
        .hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .hamburger.open span:nth-child(2) { opacity: 0; }
        .hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        .search-bar-area {
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--surface);
            box-shadow: 0 8px 20px rgba(23, 81, 124, 0.1);
            padding: 16px 0;
            z-index: 999;
            display: none;
        }
        .search-bar-area.show { display: block; }
        .search-bar-inner {
            display: flex;
            gap: 12px;
            max-width: 720px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .search-bar-inner input {
            flex: 1;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 0 16px;
            font-size: 14px;
            background: var(--bg);
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        .search-bar-inner input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(23, 81, 124, 0.15);
        }
        .search-bar-inner .search-submit {
            height: 44px;
            padding: 0 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            transition: background 0.2s;
        }
        .search-bar-inner .search-submit:hover { background: #0e3a5c; }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            padding: 60px 0 50px;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 20px;
            bottom: 0;
            left: 50%;
            width: 1px;
            background: linear-gradient(to bottom, rgba(227, 234, 240, 0), var(--border) 12%, var(--border) 88%, rgba(227, 234, 240, 0));
            z-index: 0;
        }
        .hero .container { position: relative; z-index: 1; }
        .hero-content { padding: 20px 40px 20px 0; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 16px;
            margin-bottom: 20px;
        }
        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
        }
        .hero-title {
            font-size: 36px;
            font-weight: 600;
            line-height: 1.3;
            color: var(--primary);
            margin-bottom: 16px;
            letter-spacing: 0.01em;
        }
        .hero-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 440px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-visual { padding: 20px 0 20px 20px; }
        .hero-image-wrap {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
            height: 340px;
            background: var(--primary-soft);
        }
        .hero-image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .hero-image-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: var(--primary);
            opacity: 0.15;
            pointer-events: none;
        }

        /* ===== 信任数据条 ===== */
        .trust-bar {
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 32px 0;
            margin-top: 20px;
        }
        .trust-stats { display: flex; flex-wrap: wrap; }
        .trust-stats .cell {
            text-align: center;
            padding: 8px 0;
        }
        .stat-num {
            font-size: 28px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
        }
        .stat-num em {
            font-style: normal;
            font-size: 16px;
            font-weight: 600;
            margin-left: 2px;
            color: var(--accent);
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 2px;
        }

        /* ===== 通用区块 ===== */
        .section { padding: var(--space-section) 0; }
        .section-header {
            margin-bottom: 40px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-header h2 {
            font-size: 30px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 8px;
        }
        .section-header p {
            font-size: 15px;
            color: var(--text-secondary);
        }
        .section-footer {
            text-align: center;
            margin-top: 36px;
        }

        /* ===== 权益对比表 ===== */
        .table-scroll {
            overflow-x: auto;
            border-radius: var(--radius);
            background: var(--surface);
            box-shadow: var(--shadow-card);
            -webkit-overflow-scrolling: touch;
        }
        .table-scroll::-webkit-scrollbar { height: 6px; }
        .table-scroll::-webkit-scrollbar-track { background: var(--bg); }
        .table-scroll::-webkit-scrollbar-thumb { background: #b8cbd8; border-radius: 4px; }
        .benefit-table {
            width: 100%;
            border-collapse: separate;
            border-spacing: 0;
            min-width: 720px;
            font-size: 14px;
        }
        .benefit-table th,
        .benefit-table td {
            padding: 14px 20px;
            text-align: center;
            border-bottom: 1px solid var(--border);
            color: var(--text);
        }
        .benefit-table thead th {
            background: var(--primary-soft);
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            padding: 18px 20px;
        }
        .benefit-table thead th:first-child {
            text-align: left;
            border-radius: var(--radius) 0 0 0;
        }
        .benefit-table thead th:last-child {
            border-radius: 0 var(--radius) 0 0;
        }
        .benefit-table tbody td:first-child {
            text-align: left;
            font-weight: 500;
            color: var(--text);
        }
        .benefit-table tbody tr:last-child td { border-bottom: none; }
        .benefit-table .highlight-col {
            border-left: 2px solid var(--primary);
            border-right: 2px solid var(--primary);
            background: rgba(234, 241, 248, 0.4);
            position: relative;
        }
        .benefit-table thead .highlight-col {
            border-top: 2px solid var(--primary);
            background: var(--primary-soft);
        }
        .benefit-table tbody tr:last-child .highlight-col { border-bottom: 2px solid var(--primary); }
        .benefit-table .fa-check { color: var(--success); font-size: 16px; }
        .benefit-table .text-na { color: #aaa; }
        .badge-hot {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: 10px;
            margin-left: 6px;
            vertical-align: middle;
        }
        .table-note {
            font-size: 12px;
            color: var(--text-secondary);
            margin-top: 16px;
            text-align: right;
        }

        /* ===== 等级亮点时间线 ===== */
        .timeline-wrap { position: relative; padding: 20px 0; }
        .timeline {
            position: relative;
            max-width: 960px;
            margin: 0 auto;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            border-left: 2px dashed rgba(23, 81, 124, 0.2);
            transform: translateX(-50%);
        }
        .timeline-item {
            position: relative;
            width: 50%;
            padding: 0 40px 40px;
        }
        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }
        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }
        .timeline-item:last-child { padding-bottom: 0; }
        .timeline-node {
            position: absolute;
            top: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            border: 2px solid var(--primary);
            background: var(--surface);
            color: var(--primary);
            font-size: 15px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }
        .timeline-item:nth-child(odd) .timeline-node {
            right: -20px;
        }
        .timeline-item:nth-child(even) .timeline-node {
            left: -20px;
        }
        .timeline-item.active .timeline-node {
            background: var(--primary);
            color: #fff;
        }
        .timeline-card {
            background: var(--surface);
            border-radius: var(--radius);
            box-shadow: var(--shadow-card);
            padding: 20px 24px;
            transition: box-shadow 0.3s, transform 0.3s;
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .timeline-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .timeline-card ul {
            list-style: none;
            padding: 0;
        }
        .timeline-card ul li {
            position: relative;
            padding-left: 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 6px;
        }
        .timeline-card ul li::before {
            content: '';
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent);
        }
        .timeline-footer {
            text-align: center;
            margin-top: 36px;
        }

        /* ===== 专属内容预览 ===== */
        .preview-grid {
            margin: 0 -12px;
        }
        .preview-card {
            margin-bottom: 24px;
            background: var(--surface);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            display: block;
            transition: all 0.3s ease;
            text-decoration: none;
        }
        .preview-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            text-decoration: none;
        }
        .preview-card .card-img {
            position: relative;
            height: 200px;
            background: var(--primary-soft);
            overflow: hidden;
        }
        .preview-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .preview-card .badge-lock {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 12px;
            z-index: 3;
        }
        .preview-card .lock-overlay {
            position: absolute;
            inset: 0;
            background: rgba(255, 255, 255, 0.6);
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
        }
        .preview-card .lock-overlay i {
            font-size: 28px;
            color: var(--primary);
            opacity: 0.7;
        }
        .preview-card .card-body {
            padding: 16px 20px;
        }
        .preview-card .card-body h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.4;
            transition: color 0.2s;
        }
        .preview-card:hover .card-body h3 { color: var(--primary); }
        .preview-card .card-body .meta {
            font-size: 13px;
            color: var(--text-secondary);
        }

        /* ===== 最新资讯 ===== */
        .news-section { background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-list-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--bg);
            border-radius: var(--radius);
            padding: 16px;
            transition: all 0.3s ease;
            border: 1px solid transparent;
            text-decoration: none;
        }
        .news-list-item:hover {
            background: var(--surface);
            border-color: var(--border);
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
            text-decoration: none;
        }
        .news-thumb {
            width: 96px;
            height: 96px;
            border-radius: 8px;
            overflow: hidden;
            flex-shrink: 0;
            background: var(--primary-soft);
        }
        .news-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .news-content { flex: 1; min-width: 0; }
        .news-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.4;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: color 0.2s;
        }
        .news-list-item:hover .news-content h3 { color: var(--primary); }
        .news-content p {
            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: 8px;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        .news-meta .tag {
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: 12px;
        }
        .news-meta .date { white-space: nowrap; }
        .empty-state {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 40px 20px;
            text-align: center;
            color: var(--text-secondary);
            font-size: 14px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 12px;
        }
        .empty-state i {
            font-size: 36px;
            color: #b8cbd8;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color 0.2s, box-shadow 0.2s;
        }
        .faq-item:hover { border-color: var(--primary); }
        .faq-item.open { border-color: var(--primary); box-shadow: var(--shadow-card); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: var(--surface);
            text-align: left;
            transition: background 0.2s;
            position: relative;
        }
        .faq-question:hover { background: var(--primary-soft); }
        .faq-question::before {
            content: '';
            width: 4px;
            height: 20px;
            border-radius: 4px;
            background: transparent;
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            transition: background 0.2s;
        }
        .faq-item.open .faq-question::before { background: var(--primary); }
        .faq-icon {
            width: 24px;
            height: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            transition: transform 0.2s;
            flex-shrink: 0;
        }
        .faq-item.open .faq-icon { transform: rotate(45deg); }
        .faq-answer {
            display: none;
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer { display: block; }
        .faq-assist {
            text-align: center;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 24px;
        }
        .faq-assist a { color: var(--accent); font-weight: 600; }

        /* ===== CTA横幅 ===== */
        .cta-banner {
            background: var(--primary);
            padding: 60px 0;
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-inner h2 {
            font-size: 26px;
            font-weight: 600;
            color: #fff;
            margin: 0;
            line-height: 1.4;
        }
        .cta-inner .btn-primary {
            background: var(--accent);
            min-width: 160px;
        }
        .cta-inner .btn-primary:hover { background: #d15f1f; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0F2C40;
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 0;
        }
        .footer-top {
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer-logo svg { width: 24px; height: 24px; }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 260px;
        }
        .footer-col { margin-bottom: 20px; }
        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 4px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover { color: #fff; }
        .footer-contact {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 2;
        }
        .footer-contact strong { color: #fff; font-weight: 600; }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }
        .footer-bottom a { color: rgba(255, 255, 255, 0.6); }
        .footer-bottom .icp { margin-left: 8px; }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .section { --space-section: 56px; }
            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--surface);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                box-shadow: 0 8px 20px rgba(23, 81, 124, 0.12);
                display: none;
                z-index: 999;
            }
            .main-nav.open { display: flex; }
            .main-nav a { width: 100%; padding: 10px 0; font-size: 16px; }
            .main-nav a.active::after { display: none; }
            .main-nav a.active { background: var(--primary-soft); padding: 10px 14px; border-radius: 8px; width: auto; }
            .hamburger { display: flex; }
            .nav-left::after { display: none; }
            .nav-right::before { display: none; }
            .hero { padding-top: 20px; }
            .hero::before { display: none; }
            .hero-content, .hero-visual { padding: 16px 0; }
            .hero-image-wrap { height: 260px; }
            .timeline::before { left: 20px; }
            .timeline-item,
            .timeline-item:nth-child(odd),
            .timeline-item:nth-child(even) {
                width: 100%;
                left: 0;
                padding-left: 60px;
                padding-right: 0;
                text-align: left;
            }
            .timeline-item:nth-child(odd) .timeline-node,
            .timeline-item:nth-child(even) .timeline-node {
                left: 0;
                right: auto;
            }
            .preview-card .card-img { height: 180px; }
        }

        @media (max-width: 640px) {
            .section { --space-section: 48px; }
            .container { padding: 0 16px; }
            .hero-title { font-size: 28px; }
            .hero-subtitle { font-size: 15px; }
            .hero-actions .btn { flex: 1; min-width: 100%; }
            .hero-image-wrap { height: 220px; }
            .stat-num { font-size: 24px; }
            .section-header h2 { font-size: 24px; }
            .section-header p { font-size: 14px; }
            .news-list-item { flex-direction: column; align-items: flex-start; }
            .news-thumb { width: 100%; height: 160px; }
            .news-content h3 { white-space: normal; }
            .preview-grid .cell { padding: 0 8px; }
            .preview-card { scroll-snap-align: start; }
            .preview-grid { overflow-x: auto; flex-wrap: nowrap; scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch; margin: 0 -16px; padding: 0 16px; }
            .preview-grid .cell { flex: 0 0 82%; max-width: 82%; }
            .cta-inner { flex-direction: column; text-align: center; }
            .cta-inner .btn-primary { width: 100%; }
            .footer-bottom { justify-content: center; text-align: center; }
            .footer-contact { font-size: 13px; }
            .nav-right .btn-cta { display: none; }
            .search-bar-inner { padding: 0 16px; }
        }

/* roulang page: article */
:root {
    --bg: #F5F8FB;
    --surface: #FFFFFF;
    --primary: #17517C;
    --primary-soft: #EAF1F8;
    --accent: #E8742A;
    --success: #2F9E6E;
    --text: #1E2A32;
    --text-secondary: #5B6B7A;
    --border: #E3EAF0;
    --shadow-card: 0 2px 12px rgba(23,81,124,0.08);
    --shadow-card-hover: 0 6px 24px rgba(23,81,124,0.14);
    --radius-card: 12px;
    --radius-btn: 8px;
    --space-section: 80px;
    --font-family: "PingFang SC", "Microsoft YaHei", -apple-system, "Helvetica Neue", Arial, sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

button, input, select, textarea {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

ul, ol {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
    width: 100%;
}

/* ============ Header / Nav ============ */
.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    height: 64px;
    background: rgba(255,255,255,0.97);
    box-shadow: 0 1px 0 var(--border);
    transition: background 0.3s ease, box-shadow 0.3s ease;
}

.main-header.scrolled {
    background: #fff;
    box-shadow: var(--shadow-card);
}

.header-inner {
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 40px;
    flex: 1;
    min-width: 0;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 14px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: var(--primary);
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.logo svg {
    flex-shrink: 0;
}

.main-nav {
    display: flex;
    gap: 30px;
}

.main-nav a {
    position: relative;
    font-size: 15px;
    color: var(--text);
    padding: 8px 0;
    font-weight: 400;
    transition: color 0.2s ease;
}

.main-nav a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 2px;
    width: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: width 0.25s ease;
}

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

.main-nav a:hover::after {
    width: 100%;
}

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

.main-nav a.active::after {
    width: 100%;
}

.btn-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    padding: 0 24px;
    height: 36px;
    border-radius: var(--radius-btn);
    font-size: 14px;
    font-weight: 600;
    transition: background 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
    box-shadow: 0 2px 8px rgba(232,116,42,0.2);
    white-space: nowrap;
}

.btn-cta:hover {
    background: #d4611f;
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(232,116,42,0.3);
}

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

.btn-cta:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.search-toggle {
    width: 38px;
    height: 38px;
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 16px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease, color 0.2s ease;
}

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

.search-toggle:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.nav-toggle {
    display: none;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: transparent;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
    transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

/* SearchBar */
.search-bar {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    box-shadow: var(--shadow-card);
    padding: 16px 0;
    z-index: 99;
    border-top: 1px solid var(--border);
}

.search-bar.open {
    display: block;
    animation: searchFadeIn 0.25s ease;
}

@keyframes searchFadeIn {
    from { opacity: 0; transform: translateY(-6px); }
    to { opacity: 1; transform: translateY(0); }
}

.search-bar .container {
    display: flex;
    gap: 12px;
    align-items: center;
}

.search-bar input {
    flex: 1;
    height: 44px;
    padding: 0 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-btn);
    font-size: 15px;
    background: var(--bg);
    color: var(--text);
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.search-bar input::placeholder {
    color: #9AA8B5;
}

.search-bar input:focus {
    border-color: var(--primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(23,81,124,0.12);
}

.btn-search-submit {
    height: 44px;
    padding: 0 24px;
    border-radius: var(--radius-btn);
    background: var(--primary);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

.btn-search-submit:hover {
    background: #103a5a;
}

/* ============ Breadcrumb ============ */
.article-page {
    padding: 36px 0 var(--space-section);
}

.article-layout {
    max-width: 960px;
    margin: 0 auto;
}

.breadcrumb {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
}

.breadcrumb a {
    color: var(--text-secondary);
    transition: color 0.2s ease;
}

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

.breadcrumb .separator {
    color: #C2CEDB;
}

.breadcrumb .breadcrumb-category {
    color: var(--primary);
    font-weight: 500;
}

.breadcrumb .breadcrumb-current {
    color: var(--text-secondary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 300px;
}

/* ============ Article Card ============ */
.article-card {
    background: var(--surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 48px;
    margin-bottom: 40px;
    border: 1px solid rgba(227,234,240,0.6);
}

.article-header {
    margin-bottom: 28px;
}

.article-header h1 {
    font-size: 36px;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: 0.2px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 28px;
    font-size: 14px;
    color: var(--text-secondary);
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.article-meta .meta-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.article-meta i {
    color: var(--primary);
    font-size: 13px;
    opacity: 0.7;
}

.article-excerpt {
    background: var(--primary-soft);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
    padding: 18px 22px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
    margin: 28px 0 36px;
}

/* ============ Article Body ============ */
.article-body {
    max-width: 720px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
}

.article-body > *:first-child {
    margin-top: 0;
}

.article-body p {
    margin-bottom: 24px;
}

.article-body h2 {
    font-size: 26px;
    font-weight: 600;
    color: var(--text);
    margin: 40px 0 18px;
    line-height: 1.4;
}

.article-body h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
    margin: 32px 0 14px;
    line-height: 1.4;
}

.article-body h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text);
    margin: 28px 0 12px;
}

.article-body ul,
.article-body ol {
    margin-bottom: 24px;
    padding-left: 24px;
}

.article-body ul li {
    list-style: disc;
    margin-bottom: 8px;
    padding-left: 4px;
}

.article-body ol li {
    list-style: decimal;
    margin-bottom: 8px;
    padding-left: 4px;
}

.article-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
    text-decoration-thickness: 1px;
}

.article-body a:hover {
    color: var(--accent);
}

.article-body blockquote {
    background: var(--primary-soft);
    border-left: 4px solid var(--primary);
    border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
    padding: 18px 22px;
    margin: 28px 0;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.8;
}

.article-body img {
    border-radius: var(--radius-card);
    margin: 28px 0;
    width: 100%;
    height: auto;
}

.article-body figure {
    margin: 28px 0;
}

.article-body figure img {
    margin: 0 0 10px;
}

.article-body figcaption {
    font-size: 13px;
    text-align: center;
    color: var(--text-secondary);
    line-height: 1.6;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 14px;
    background: #fff;
    border-radius: var(--radius-card);
    overflow: hidden;
    border: 1px solid var(--border);
}

.article-body table th {
    background: var(--primary-soft);
    color: var(--primary);
    font-weight: 600;
    text-align: left;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

.article-body table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

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

.article-body table tr:hover td {
    background: #F9FBFD;
}

.article-body code {
    background: #F0F2F5;
    border-radius: 6px;
    padding: 2px 8px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    color: #C0392B;
}

.article-body pre {
    background: #F0F2F5;
    border-radius: var(--radius-btn);
    padding: 20px;
    margin: 28px 0;
    overflow-x: auto;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 14px;
    line-height: 1.7;
    color: var(--text);
}

.article-body pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.article-body hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 40px 0;
}

.article-body strong {
    font-weight: 600;
    color: var(--text);
}

/* ============ Article Pager ============ */
.article-pager {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 32px;
    border-top: 1px solid var(--border);
    margin-top: 48px;
    gap: 12px;
    flex-wrap: wrap;
}

.pager-prev,
.pager-next {
    color: var(--primary);
    font-size: 15px;
    font-weight: 500;
    padding: 8px 4px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
}

.pager-prev:hover {
    transform: translateX(-3px);
    color: var(--accent);
}

.pager-next:hover {
    transform: translateX(3px);
    color: var(--accent);
}

.pager-back {
    color: var(--text-secondary);
    font-size: 14px;
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 20px;
    transition: all 0.2s ease;
}

.pager-back:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-soft);
}

/* ============ Related Section ============ */
.related-section {
    padding-top: 8px;
    margin-bottom: 24px;
}

.related-section .section-title {
    font-size: 24px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.related-section .section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.related-card {
    background: var(--surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid rgba(227,234,240,0.5);
    display: block;
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
}

.related-card .related-img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--primary-soft);
}

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

.related-card h3 {
    font-size: 17px;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text);
    margin-bottom: 8px;
    transition: color 0.2s ease;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-card:hover h3 {
    color: var(--primary);
}

.related-card .related-duration {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 6px;
}

.related-card .related-duration i {
    color: var(--accent);
    font-size: 12px;
}

/* ============ Article Not Found ============ */
.article-notfound {
    background: var(--surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    padding: 90px 40px;
    text-align: center;
    border: 1px solid rgba(227,234,240,0.5);
}

.article-notfound .nf-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 28px;
    color: var(--primary);
}

.article-notfound h1 {
    font-size: 30px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 14px;
}

.article-notfound p {
    color: var(--text-secondary);
    font-size: 15px;
    margin-bottom: 32px;
    max-width: 360px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.7;
}

.article-notfound .btn-cta {
    display: inline-flex;
    height: 44px;
}

/* ============ Footer ============ */
.site-footer {
    background: #0F2C40;
    color: #fff;
    padding: 64px 0 0;
}

.footer-top {
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    color: #fff;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    line-height: 1.7;
    color: rgba(255,255,255,0.65);
    max-width: 280px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
    color: #fff;
    letter-spacing: 0.3px;
}

.footer-col a {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.65);
    margin-bottom: 10px;
    transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-col a:hover {
    color: #fff;
    padding-left: 4px;
}

.footer-contact {
    font-size: 14px;
    line-height: 1.9;
    color: rgba(255,255,255,0.65);
}

.footer-contact a {
    color: rgba(255,255,255,0.85);
    display: inline;
    padding: 0;
}

.footer-contact a:hover {
    color: var(--accent);
    padding: 0;
}

.footer-bottom {
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255,255,255,0.45);
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom .icp {
    margin-left: 8px;
}

/* ============ Responsive ============ */
@media (max-width: 1023px) {
    .nav-toggle {
        display: flex;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: var(--shadow-card);
        padding: 12px 24px 20px;
        flex-direction: column;
        gap: 4px;
        border-top: 1px solid var(--border);
    }

    .main-nav.open {
        display: flex;
        animation: navFadeIn 0.25s ease;
    }

    @keyframes navFadeIn {
        from { opacity: 0; transform: translateY(-8px); }
        to { opacity: 1; transform: translateY(0); }
    }

    .main-nav a {
        padding: 12px 4px;
        font-size: 16px;
        border-bottom: 1px solid #F0F4F8;
    }

    .main-nav a::after {
        display: none;
    }

    .main-nav a.active {
        color: var(--primary);
        font-weight: 600;
        background: var(--primary-soft);
        border-radius: 6px;
        padding-left: 12px;
    }

    .header-left {
        gap: 20px;
    }

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

@media (max-width: 767px) {
    :root {
        --space-section: 48px;
    }

    .container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .article-page {
        padding: 24px 0 48px;
    }

    .breadcrumb {
        margin-bottom: 16px;
    }

    .article-card {
        padding: 24px;
        border-radius: 10px;
    }

    .article-header h1 {
        font-size: 28px;
        line-height: 1.35;
    }

    .article-meta {
        gap: 10px 16px;
        font-size: 13px;
    }

    .article-excerpt {
        font-size: 14px;
        padding: 16px;
        margin: 20px 0 28px;
    }

    .article-body {
        font-size: 15px;
        line-height: 1.8;
    }

    .article-body h2 {
        font-size: 24px;
    }

    .article-body h3 {
        font-size: 20px;
    }

    .article-pager {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
        gap: 10px;
    }

    .pager-prev,
    .pager-next,
    .pager-back {
        justify-content: center;
    }

    .related-section .section-title {
        font-size: 20px;
    }

    .related-grid {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        gap: 14px;
        margin: 0 -16px;
        padding: 4px 16px 8px;
    }

    .related-card {
        min-width: 240px;
        scroll-snap-align: start;
        flex-shrink: 0;
    }

    .related-card .related-img {
        height: 150px;
    }

    .article-notfound {
        padding: 60px 24px;
    }

    .article-notfound h1 {
        font-size: 26px;
    }

    .site-footer {
        padding: 48px 0 0;
    }

    .footer-logo {
        margin-bottom: 12px;
    }

    .footer-desc {
        margin-bottom: 24px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: 6px;
    }

    .header-right .btn-cta {
        padding: 0 16px;
        font-size: 13px;
        height: 34px;
    }

    .search-toggle {
        width: 34px;
        height: 34px;
    }
}

@media (max-width: 374px) {
    .header-right .btn-cta {
        display: none;
    }

    .logo {
        font-size: 18px;
    }

    .article-card {
        padding: 20px 16px;
    }
}

/* roulang page: category1 */
:root {
            --bg: #F5F8FB;
            --surface: #FFFFFF;
            --primary: #17517C;
            --primary-soft: #EAF1F8;
            --accent: #E8742A;
            --success: #2F9E6E;
            --text: #1E2A32;
            --text-secondary: #5B6B7A;
            --border: #E3EAF0;
            --shadow-card: 0 2px 12px rgba(23, 81, 124, 0.08);
            --shadow-card-hover: 0 6px 24px rgba(23, 81, 124, 0.14);
            --radius-card: 12px;
            --radius-btn: 8px;
            --radius-tag: 16px;
            --space-section: 80px;
            --header-h: 64px;
            --font-sans: "PingFang SC", "Microsoft YaHei", -apple-system, "Helvetica Neue", Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
        }

        a:hover {
            color: #0F2C40;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        h1,
        h2,
        h3,
        h4 {
            margin: 0 0 12px;
            color: var(--primary);
            line-height: 1.3;
        }

        p {
            margin: 0 0 16px;
        }

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

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

        .section + .section {
            padding-top: 0;
        }

        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 40px;
        }

        .section-head h2 {
            font-size: 30px;
            font-weight: 600;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: 16px;
        }

        .btn,
        .primary-cta,
        .secondary-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 16px;
            font-weight: 600;
            border: none;
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .primary-cta {
            background: var(--accent);
            color: #fff;
        }

        .primary-cta:hover {
            background: #D2611F;
            color: #fff;
            transform: translateY(-1px);
        }

        .primary-cta:active {
            transform: translateY(1px);
        }

        .secondary-btn {
            background: #fff;
            border: 1px solid var(--primary);
            color: var(--primary);
        }

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

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            height: var(--header-h);
            background: #fff;
            box-shadow: var(--shadow-card);
            z-index: 1000;
        }

        .nav-wrap {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
        }

        .nav-left {
            display: flex;
            align-items: center;
            gap: 32px;
        }

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

        .logo svg {
            flex: 0 0 auto;
        }

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

        .main-nav {
            display: flex;
            gap: 24px;
        }

        .main-nav a {
            position: relative;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .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;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

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

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 36px;
            padding: 0 20px;
            border-radius: var(--radius-btn);
            background: var(--accent);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            transition: background 0.2s ease, transform 0.2s ease;
        }

        .nav-cta:hover {
            background: #D2611F;
            color: #fff;
            transform: translateY(-1px);
        }

        .search-toggle,
        .menu-toggle {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: transparent;
            border: none;
            border-radius: var(--radius-btn);
            color: var(--primary);
            font-size: 18px;
            cursor: pointer;
            transition: background 0.2s ease, color 0.2s ease;
        }

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

        .menu-toggle {
            display: none;
        }

        .search-bar {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }

        .search-bar.open {
            display: block;
        }

        .search-form {
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .search-input {
            flex: 1;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            padding: 0 16px;
            font-size: 16px;
            font-family: var(--font-sans);
            background: #fff;
            color: var(--text);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .search-input:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(23, 81, 124, 0.15);
        }

        .search-submit {
            min-height: 44px;
            padding: 0 24px;
            background: var(--primary);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s ease;
        }

        .search-submit:hover {
            background: #0F2C40;
        }

        /* ===== Page Head ===== */
        .page-head {
            background: var(--primary-soft);
            padding: 48px 0 40px;
        }

        .breadcrumb {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

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

        .breadcrumb span {
            margin: 0 6px;
            color: var(--text-secondary);
        }

        .page-head h1 {
            font-size: 36px;
            font-weight: 600;
            margin: 0 0 8px;
        }

        .page-lead {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0;
        }

        /* ===== Intro Card ===== */
        .intro-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

        .intro-card .intro-media {
            display: flex;
            align-items: stretch;
        }

        .intro-card .intro-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .intro-content {
            padding: 32px;
        }

        .section-tag {
            display: inline-block;
            background: var(--primary-soft);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 500;
            margin-bottom: 16px;
        }

        .intro-content h2 {
            font-size: 26px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .intro-content p {
            color: var(--text-secondary);
            font-size: 16px;
            margin-bottom: 16px;
        }

        .intro-content .btn {
            margin-top: 8px;
        }

        /* ===== Level Panel ===== */
        .level-panel {
            background: #0F2C40;
            border-radius: var(--radius-card);
            padding: 40px;
            color: #fff;
        }

        .level-grid {
            display: flex;
            gap: 24px;
            flex-wrap: wrap;
        }

        .level-item {
            position: relative;
            flex: 1 1 280px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: transform 0.2s ease, border-color 0.2s ease, background 0.2s ease;
        }

        .level-item:hover {
            transform: translateY(-4px);
            border-color: rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
        }

        .level-item.hot {
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.08);
        }

        .level-badge {
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background: var(--accent);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: var(--radius-tag);
            white-space: nowrap;
        }

        .level-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 1px;
            margin-bottom: 8px;
        }

        .level-item h3 {
            color: #fff;
            font-size: 22px;
            font-weight: 600;
        }

        .level-item > p {
            color: #9FB3C5;
            font-size: 14px;
            margin-bottom: 16px;
        }

        .level-item ul li {
            color: #D6E1EC;
            font-size: 15px;
            padding: 6px 0;
        }

        .level-item ul li i {
            color: var(--success);
            margin-right: 8px;
        }

        .level-timeline {
            display: flex;
            gap: 16px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.15);
        }

        .timeline-step {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            flex: 1;
        }

        .step-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid rgba(255, 255, 255, 0.3);
            flex: 0 0 auto;
            margin-top: 6px;
        }

        .timeline-step strong {
            display: block;
            color: #fff;
            font-size: 16px;
            font-weight: 600;
        }

        .timeline-step p {
            color: #9FB3C5;
            font-size: 13px;
            margin: 4px 0 0;
        }

        /* ===== Topic Grid ===== */
        .topic-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .topic-card {
            display: flex;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--primary);
        }

        .topic-card img {
            width: 180px;
            min-height: 100%;
            object-fit: cover;
            flex: 0 0 auto;
            background: var(--primary-soft);
        }

        .topic-card-body {
            padding: 20px;
            flex: 1;
        }

        .topic-card-body h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .topic-card-body p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 12px;
        }

        .topic-link {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
        }

        .topic-card:hover .topic-link {
            color: var(--accent);
        }

        /* ===== Data Panel ===== */
        .data-panel {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 36px 24px;
        }

        .data-item {
            text-align: center;
            padding: 8px;
        }

        .data-item strong {
            display: block;
            font-size: 34px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .data-item strong span {
            font-size: 18px;
            font-weight: 600;
        }

        .data-item .data-label {
            display: block;
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 8px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 10px;
            margin-bottom: 16px;
            overflow: hidden;
            scroll-margin-top: 80px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .faq-item.is-active {
            border-color: var(--primary);
            box-shadow: var(--shadow-card);
        }

        .faq-title {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 20px;
            background: none;
            border: none;
            font-family: var(--font-sans);
            font-size: 16px;
            font-weight: 600;
            color: var(--primary);
            cursor: pointer;
            text-align: left;
            transition: background 0.2s ease;
        }

        .faq-title:hover {
            background: var(--primary-soft);
        }

        .faq-title i {
            color: var(--accent);
            font-size: 16px;
            transition: transform 0.2s ease;
            flex: 0 0 auto;
            margin-left: 12px;
        }

        .faq-item.is-active .faq-title i {
            transform: rotate(45deg);
        }

        .faq-content {
            display: none;
            padding: 0 20px 16px;
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .faq-item.is-active .faq-content {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: var(--primary);
            border-radius: var(--radius-card);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            padding: 48px;
            color: #fff;
        }

        .cta-text h2 {
            color: #fff;
            font-size: 28px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .cta-text p {
            color: #C9D6E2;
            margin: 0;
            font-size: 16px;
        }

        .primary-cta {
            min-width: 140px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0F2C40;
            color: #B9C8D8;
            margin-top: 80px;
        }

        .site-footer .footer-top {
            padding: 56px 0 32px;
        }

        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-logo span {
            color: #fff;
            font-size: 22px;
            font-weight: 700;
        }

        .footer-desc {
            color: #9FB3C5;
            font-size: 14px;
            margin-top: 16px;
            max-width: 320px;
        }

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

        .footer-col a {
            display: block;
            color: #9FB3C5;
            font-size: 14px;
            padding: 6px 0;
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-contact {
            font-size: 14px;
            line-height: 1.9;
        }

        .footer-contact a {
            display: inline;
            padding: 0;
            color: #9FB3C5;
        }

        .footer-contact a:hover {
            color: #fff;
            padding: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .footer-bottom p {
            color: #7894A8;
            font-size: 14px;
            margin: 0;
        }

        .footer-bottom span {
            color: #7894A8;
            font-size: 14px;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1023px) {
            :root {
                --space-section: 56px;
            }

            .nav-cta,
            .search-toggle {
                display: none;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .main-nav {
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                display: none;
                flex-direction: column;
                background: #fff;
                border-bottom: 1px solid var(--border);
                padding: 8px 24px 16px;
                box-shadow: var(--shadow-card);
            }

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

            .main-nav a {
                padding: 14px 0;
                border-bottom: 1px solid var(--border);
                font-size: 16px;
            }

            .main-nav a:last-child {
                border-bottom: none;
            }

            .main-nav a.active::after {
                display: none;
            }

            .main-nav a.active {
                color: var(--primary);
                background: var(--primary-soft);
                border-radius: 8px;
                padding-left: 12px;
                padding-right: 12px;
            }

            .level-timeline {
                flex-direction: column;
                gap: 24px;
            }

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

        @media (max-width: 767px) {
            :root {
                --space-section: 48px;
            }

            .container {
                padding: 0 16px;
            }

            .page-head {
                padding: 32px 0 28px;
            }

            .page-head h1 {
                font-size: 28px;
            }

            .page-lead {
                font-size: 16px;
            }

            .section-head h2 {
                font-size: 24px;
            }

            .intro-card .intro-media img {
                min-height: 220px;
            }

            .intro-content {
                padding: 24px;
            }

            .intro-content h2 {
                font-size: 22px;
            }

            .level-panel {
                padding: 28px 20px;
            }

            .level-grid {
                flex-direction: column;
            }

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

            .topic-card {
                flex-direction: column;
            }

            .topic-card img {
                width: 100%;
                height: 160px;
            }

            .cta-banner {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }

            .primary-cta {
                width: 100%;
            }

            .btn,
            .secondary-btn {
                width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .page-head h1 {
                font-size: 26px;
            }

            .data-panel {
                padding: 24px 16px;
                gap: 16px;
            }

            .data-item strong {
                font-size: 28px;
            }

            .faq-title {
                font-size: 15px;
                padding: 14px 16px;
            }

            .faq-content {
                padding: 0 16px 14px;
            }
        }

/* roulang page: category2 */
:root {
            --bg: #F5F8FB;
            --surface: #FFFFFF;
            --primary: #17517C;
            --primary-deep: #0F2C40;
            --primary-soft: #EAF1F8;
            --accent: #E8742A;
            --success: #2F9E6E;
            --text: #1E2A32;
            --text-secondary: #5B6B7A;
            --border: #E3EAF0;
            --shadow-card: 0 2px 12px rgba(23, 81, 124, 0.08);
            --shadow-card-hover: 0 6px 24px rgba(23, 81, 124, 0.14);
            --radius-card: 12px;
            --radius-btn: 8px;
            --space-section: 80px;
            --header-h: 64px;
        }
        *, *::before, *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", -apple-system, "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }
        a:hover {
            color: #0e3d61;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul, ol {
            list-style: none;
        }
        button, input {
            font-family: inherit;
            font-size: inherit;
            border: none;
            background: none;
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--space-section) 0;
        }
        .section-head {
            margin-bottom: 40px;
            text-align: center;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 600;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 8px;
        }
        .section-head p {
            font-size: 15px;
            color: var(--text-secondary);
        }
        .card-hover {
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-hover:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            transition: background-color 0.2s ease, color 0.2s ease, transform 0.15s ease, box-shadow 0.2s ease;
            line-height: 1.2;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            box-shadow: 0 0 0 4px rgba(23, 81, 124, 0.15);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
        }
        .btn-accent:hover {
            background: #cf5f1c;
            color: #fff;
            box-shadow: 0 4px 14px rgba(232, 116, 42, 0.3);
        }
        .btn-accent:active {
            transform: translateY(1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .btn-outline:active {
            transform: translateY(1px);
        }
        .btn-sm {
            min-height: 36px;
            padding: 0 18px;
            font-size: 14px;
        }
        .btn-lg {
            min-height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
        }
        .text-link span {
            transition: transform 0.2s ease;
        }
        .text-link:hover span {
            transform: translateX(3px);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(245, 248, 251, 0.92);
            -webkit-backdrop-filter: none;
            backdrop-filter: none;
            height: var(--header-h);
            border-bottom: 1px solid transparent;
            transition: background-color 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: var(--shadow-card);
            border-bottom-color: var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 28px;
            flex: 1;
            min-width: 0;
            height: 100%;
        }
        .header-right {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
            padding-left: 28px;
            position: relative;
            height: 100%;
        }
        .header-right::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 1px;
            height: 100%;
            background: var(--border);
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            flex-shrink: 0;
            line-height: 1;
        }
        .brand-logo svg {
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: var(--primary);
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 24px;
            height: 100%;
        }
        .main-nav a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            height: 100%;
            display: flex;
            align-items: center;
            transition: color 0.2s ease;
        }
        .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: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px 2px 0 0;
        }
        .search-btn {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 8px;
            color: var(--text-secondary);
            font-size: 16px;
            cursor: pointer;
            transition: background-color 0.2s ease, color 0.2s ease;
        }
        .search-btn:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .search-btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: 8px;
            cursor: pointer;
        }
        .menu-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--text);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }
        .menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .search-popup {
            display: none;
            position: absolute;
            top: var(--header-h);
            left: 0;
            width: 100%;
            background: #fff;
            box-shadow: 0 6px 24px rgba(23, 81, 124, 0.12);
            border-bottom: 1px solid var(--border);
            z-index: 99;
        }
        .search-popup.show {
            display: block;
        }
        .search-popup-inner {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 16px 24px;
        }
        .search-popup input {
            flex: 1;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 0 16px;
            font-size: 15px;
            color: var(--text);
            background: var(--bg);
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }
        .search-popup input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(23, 81, 124, 0.15);
        }
        .search-popup .btn {
            flex-shrink: 0;
        }
        .search-close {
            width: 36px;
            height: 36px;
            border-radius: 8px;
            font-size: 22px;
            color: var(--text-secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background-color 0.2s ease;
        }
        .search-close:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }

        /* ===== 分类 Hero ===== */
        .category-hero {
            background: var(--primary-deep) url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            position: relative;
            color: #fff;
            padding: 80px 0 64px;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 44, 64, 0.82);
            z-index: 0;
        }
        .category-hero .container {
            position: relative;
            z-index: 1;
        }
        .category-hero .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
        }
        .category-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
        }
        .category-hero .breadcrumb a:hover {
            color: #fff;
        }
        .category-hero h1 {
            font-size: 36px;
            font-weight: 600;
            line-height: 1.3;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .category-hero .hero-subtitle {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.9);
            max-width: 520px;
            margin-bottom: 28px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .category-hero .btn-outline {
            color: #fff;
            border-color: rgba(255, 255, 255, 0.7);
        }
        .category-hero .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
        }

        /* ===== 主视觉卡 ===== */
        .cat-overview {
            padding: 80px 0 0;
        }
        .overview-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }
        .overview-card .grid-x {
            align-items: center;
        }
        .overview-img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
            border-radius: 0;
        }
        .overview-content {
            padding: 48px;
        }
        .overview-content h2 {
            font-size: 28px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
            line-height: 1.3;
        }
        .overview-content p {
            margin-bottom: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 15px;
        }
        .overview-content p:last-child {
            margin-bottom: 0;
        }
        .overview-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 24px;
        }
        .overview-tags span {
            display: inline-block;
            padding: 6px 14px;
            background: var(--primary-soft);
            color: var(--primary);
            font-size: 13px;
            border-radius: 16px;
            font-weight: 500;
        }

        /* ===== 子栏目目录 ===== */
        .cat-directory {
            padding: 80px 0;
        }
        .dir-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .dir-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .dir-card .dir-cover {
            width: 100%;
            height: 190px;
            object-fit: cover;
            border-radius: 0;
            background: var(--primary-soft);
        }
        .dir-card-body {
            padding: 24px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .dir-card-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .dir-card-body p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 18px;
            flex: 1;
        }
        .dir-card-body .text-link {
            align-self: flex-start;
        }

        /* ===== 数据条 ===== */
        .cat-stats {
            padding: 0 0 80px;
        }
        .stat-row {
            display: flex;
            flex-wrap: wrap;
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            background: var(--surface);
            overflow: hidden;
        }
        .stat-item {
            flex: 1;
            min-width: 160px;
            padding: 32px 24px;
            text-align: center;
            position: relative;
        }
        .stat-item + .stat-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 20%;
            height: 60%;
            width: 1px;
            background: var(--border);
        }
        .stat-num {
            display: block;
            font-size: 30px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.3;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== 适用场景 ===== */
        .cat-scenarios {
            padding: 0 0 80px;
        }
        .scenario-card {
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 32px 28px;
            height: 100%;
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .scenario-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }
        .scenario-card i {
            font-size: 32px;
            color: var(--accent);
            display: block;
            margin-bottom: 18px;
        }
        .scenario-card h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 流程 ===== */
        .cat-process {
            padding: 0 0 80px;
        }
        .process-steps {
            display: flex;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 0;
            position: relative;
        }
        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            padding: 0 20px;
            position: relative;
        }
        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .process-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 220px;
            margin: 0 auto;
        }
        .process-line {
            width: 40px;
            height: 2px;
            background: var(--border);
            margin-top: 22px;
            flex-shrink: 0;
        }

        /* ===== FAQ ===== */
        .cat-faq {
            padding: 0 0 80px;
        }
        .custom-accordion {
            max-width: 800px;
            margin: 0 auto;
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
        }
        .custom-accordion .accordion-item {
            border-bottom: 1px solid var(--border);
        }
        .custom-accordion .accordion-item:last-child {
            border-bottom: none;
        }
        .custom-accordion .accordion-title {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            background: #fff;
            transition: background-color 0.2s ease;
            position: relative;
        }
        .custom-accordion .accordion-title:hover {
            background: var(--primary-soft);
            color: var(--primary);
        }
        .custom-accordion .accordion-title::after {
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--primary);
            transition: transform 0.2s ease;
            flex-shrink: 0;
            margin-left: 16px;
            line-height: 1;
        }
        .custom-accordion .accordion-item.is-active .accordion-title::after {
            transform: rotate(45deg);
        }
        .custom-accordion .accordion-content {
            padding: 0 24px 20px;
            font-size: 14px;
            line-height: 1.7;
            color: var(--text-secondary);
            background: #fff;
        }
        .custom-accordion .accordion-item.is-active .accordion-content {
            background: #fff;
        }

        /* ===== CTA ===== */
        .cta-banner {
            background: var(--primary);
            padding: 60px 0;
            color: #fff;
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
        }
        .cta-inner h2 {
            font-size: 26px;
            font-weight: 600;
            line-height: 1.4;
            color: #fff;
            margin: 0;
        }
        .cta-inner .btn-accent {
            flex-shrink: 0;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-deep);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }
        .footer-top {
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-logo svg {
            flex-shrink: 0;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.65);
            max-width: 260px;
        }
        .footer-col {
            margin-bottom: 24px;
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            padding: 4px 0;
            transition: color 0.2s ease;
        }
        .footer-col a:hover {
            color: #fff;
        }
        .footer-contact {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
        }
        .footer-contact strong {
            color: rgba(255, 255, 255, 0.9);
            font-weight: 600;
        }
        .footer-contact a {
            color: rgba(255, 255, 255, 0.8);
        }
        .footer-contact a:hover {
            color: #fff;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom .icp {
            margin-left: 8px;
        }
        .footer-bottom span:last-child {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1023px) {
            .main-nav {
                position: fixed;
                top: var(--header-h);
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px 24px;
                box-shadow: var(--shadow-card);
                display: none;
                gap: 0;
                height: auto;
                z-index: 98;
                border-top: 1px solid var(--border);
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav a {
                width: 100%;
                padding: 14px 0;
                height: auto;
                border-bottom: 1px solid var(--border);
            }
            .main-nav a:last-child {
                border-bottom: none;
            }
            .main-nav a.active::after {
                display: none;
            }
            .main-nav a.active {
                color: var(--primary);
                font-weight: 600;
            }
            .menu-toggle {
                display: flex;
            }
            .header-right {
                padding-left: 14px;
            }
            .header-right::before {
                display: none;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .overview-content {
                padding: 32px;
            }
            .overview-img {
                min-height: 240px;
            }
            .process-steps {
                flex-direction: column;
                align-items: center;
            }
            .process-line {
                width: 2px;
                height: 30px;
                margin: 8px 0;
            }
            .process-step {
                max-width: 400px;
            }
            .stat-row {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .stat-item + .stat-item::before {
                display: none;
            }
            .stat-item {
                border: 1px solid var(--border);
            }
        }
        @media (max-width: 767px) {
            :root {
                --space-section: 48px;
            }
            .container {
                padding: 0 16px;
            }
            .category-hero {
                padding: 56px 0 44px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .category-hero .hero-subtitle {
                font-size: 15px;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .overview-img {
                min-height: 200px;
            }
            .overview-content {
                padding: 24px;
            }
            .overview-content h2 {
                font-size: 24px;
            }
            .section-head h2 {
                font-size: 24px;
            }
            .dir-card .dir-cover {
                height: 160px;
            }
            .stat-row {
                grid-template-columns: 1fr;
            }
            .stat-item {
                border-bottom: 1px solid var(--border);
            }
            .stat-item:last-child {
                border-bottom: none;
            }
            .cta-inner {
                flex-direction: column;
                text-align: center;
            }
            .cta-inner .btn {
                width: 100%;
            }
            .cta-inner h2 {
                font-size: 22px;
            }
            .custom-accordion .accordion-title {
                font-size: 15px;
                padding: 18px 20px;
            }
            .custom-accordion .accordion-content {
                padding: 0 20px 16px;
            }
            .footer-top {
                padding-bottom: 24px;
            }
            .footer-logo {
                margin-bottom: 10px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
        }
        @media (max-width: 520px) {
            .dir-card .dir-cover {
                height: 140px;
            }
            .overview-img {
                min-height: 160px;
            }
            .brand-logo {
                font-size: 18px;
            }
            .header-inner {
                padding: 0 16px;
            }
        }