/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a4b8c;
            --primary-light: #2a6bc4;
            --primary-dark: #0f2d5a;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --accent: #1a8c7c;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-sidebar: #0f1e33;
            --bg-sidebar-hover: #1a2e4a;
            --text-primary: #1a2332;
            --text-secondary: #4a5568;
            --text-light: #8899aa;
            --text-white: #f0f4f8;
            --text-sidebar: #b0c4de;
            --border-color: #e2e8f0;
            --border-light: #f0f2f6;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.07);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --shadow-sidebar: 2px 0 20px rgba(0,0,0,0.15);
            --transition: 0.25s ease;
            --sidebar-width: 270px;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; outline: none; }
        button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 2px; }
        ul, ol { list-style: none; padding: 0; margin: 0; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text-primary); }
        h1 { font-size: 2.6rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { color: var(--text-secondary); margin-bottom: 0.75rem; }
        .container { max-width: 1200px; padding: 0 24px; margin: 0 auto; }

        /* ===== 左侧导航布局 ===== */
        .layout-wrapper { display: flex; min-height: 100vh; }
        .sidebar {
            position: fixed; top: 0; left: 0; width: var(--sidebar-width); height: 100vh;
            background: var(--bg-sidebar); color: var(--text-sidebar); z-index: 1050;
            display: flex; flex-direction: column; box-shadow: var(--shadow-sidebar);
            transition: transform var(--transition);
        }
        .sidebar-brand {
            padding: 28px 24px 20px; border-bottom: 1px solid rgba(255,255,255,0.06);
            display: flex; align-items: center; gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 40px; height: 40px; background: var(--secondary); border-radius: var(--radius-sm);
            display: flex; align-items: center; justify-content: center; font-size: 1.5rem; color: #1a2332; flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.2rem; font-weight: 700; color: var(--text-white); line-height: 1.3; letter-spacing: 0.01em;
        }
        .sidebar-nav { flex: 1; padding: 20px 12px; overflow-y: auto; }
        .sidebar-nav .nav-item {
            display: flex; align-items: center; gap: 14px; padding: 12px 18px; margin-bottom: 4px;
            border-radius: var(--radius-sm); color: var(--text-sidebar); font-size: 1rem; font-weight: 500;
            transition: var(--transition); cursor: pointer;
        }
        .sidebar-nav .nav-item i { width: 20px; text-align: center; font-size: 1.1rem; flex-shrink: 0; }
        .sidebar-nav .nav-item:hover { background: var(--bg-sidebar-hover); color: #fff; }
        .sidebar-nav .nav-item.active { background: var(--primary); color: #fff; }
        .sidebar-nav .nav-item.active i { color: var(--secondary); }
        .sidebar-footer {
            padding: 20px 24px; border-top: 1px solid rgba(255,255,255,0.06);
            font-size: 0.8rem; color: rgba(255,255,255,0.35); text-align: center;
        }
        .main-content { margin-left: var(--sidebar-width); flex: 1; min-height: 100vh; }

        /* ===== 移动端顶部导航 ===== */
        .mobile-topbar {
            display: none; position: fixed; top: 0; left: 0; right: 0; height: 64px;
            background: var(--bg-sidebar); z-index: 1040; padding: 0 20px;
            align-items: center; justify-content: space-between; box-shadow: 0 2px 12px rgba(0,0,0,0.12);
        }
        .mobile-topbar .brand-text { font-size: 1.1rem; font-weight: 700; color: var(--text-white); }
        .mobile-topbar .hamburger {
            background: none; border: none; color: var(--text-white); font-size: 1.6rem; padding: 4px 8px; cursor: pointer;
        }
        .sidebar-overlay {
            display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.45); z-index: 1045;
        }
        .sidebar.open { transform: translateX(0); }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            position: relative; padding: 100px 0 90px; min-height: 480px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            overflow: hidden; display: flex; align-items: center;
        }
        .hero-section::before {
            content: ""; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.20; mix-blend-mode: overlay;
        }
        .hero-section::after {
            content: ""; position: absolute; bottom: -2px; left: 0; right: 0; height: 80px;
            background: var(--bg-body); clip-path: ellipse(70% 100% at 50% 100%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 720px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(255,255,255,0.12); backdrop-filter: blur(4px);
            padding: 6px 18px; border-radius: 30px; font-size: 0.85rem; color: var(--text-white); margin-bottom: 20px;
            border: 1px solid rgba(255,255,255,0.15);
        }
        .hero-badge i { color: var(--secondary); }
        .hero-title { font-size: 2.8rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 20px; }
        .hero-title span { color: var(--secondary); }
        .hero-desc { font-size: 1.1rem; color: rgba(255,255,255,0.85); max-width: 580px; margin-bottom: 32px; line-height: 1.7; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
        .btn-primary-custom {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 34px;
            background: var(--secondary); color: #1a2332; font-weight: 600; border: none; border-radius: 40px;
            font-size: 1rem; transition: var(--transition); cursor: pointer; box-shadow: 0 4px 16px rgba(232,168,56,0.35);
        }
        .btn-primary-custom:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 8px 28px rgba(232,168,56,0.45); color: #1a2332; }
        .btn-outline-custom {
            display: inline-flex; align-items: center; gap: 10px; padding: 14px 34px;
            background: transparent; color: #fff; font-weight: 500; border: 1.5px solid rgba(255,255,255,0.35);
            border-radius: 40px; font-size: 1rem; transition: var(--transition); cursor: pointer;
        }
        .btn-outline-custom:hover { background: rgba(255,255,255,0.10); border-color: rgba(255,255,255,0.6); color: #fff; transform: translateY(-2px); }

        /* ===== 板块通用 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-white); }
        .section-header { margin-bottom: 48px; text-align: center; }
        .section-header h2 { margin-bottom: 12px; position: relative; display: inline-block; }
        .section-header h2::after {
            content: ""; display: block; width: 48px; height: 3px; background: var(--secondary);
            margin: 12px auto 0; border-radius: 4px;
        }
        .section-header p { max-width: 600px; margin: 12px auto 0; font-size: 1.05rem; color: var(--text-secondary); }

        /* ===== 分类卡片 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
            box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border-color);
            display: flex; flex-direction: column; height: 100%;
        }
        .category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .category-card .card-img {
            height: 200px; background: var(--primary-light); position: relative; overflow: hidden;
        }
        .category-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
        .category-card:hover .card-img img { transform: scale(1.05); }
        .category-card .card-img .overlay {
            position: absolute; inset: 0; background: linear-gradient(0deg, rgba(15,30,51,0.5) 0%, transparent 60%);
        }
        .category-card .card-body { padding: 28px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .category-card .card-body h3 { font-size: 1.3rem; margin-bottom: 10px; }
        .category-card .card-body p { font-size: 0.95rem; color: var(--text-secondary); flex: 1; }
        .category-card .card-body .tag {
            display: inline-block; background: var(--bg-body); padding: 2px 14px; border-radius: 20px;
            font-size: 0.8rem; color: var(--text-light); margin-top: 12px; align-self: flex-start;
        }
        .category-card .card-footer {
            padding: 16px 24px; border-top: 1px solid var(--border-light); background: var(--bg-body);
        }
        .category-card .card-footer a {
            font-weight: 600; font-size: 0.95rem; color: var(--primary); display: flex; align-items: center; gap: 6px;
        }
        .category-card .card-footer a i { transition: transform var(--transition); }
        .category-card .card-footer a:hover i { transform: translateX(4px); }

        /* ===== 最新资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            background: var(--bg-card); border-radius: var(--radius-sm); padding: 20px 24px;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); transition: var(--transition);
            display: flex; flex-wrap: wrap; align-items: center; gap: 16px;
        }
        .news-item:hover { box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .news-item .news-meta {
            display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--text-light); flex-shrink: 0;
        }
        .news-item .news-meta .badge-cat {
            background: var(--primary); color: #fff; padding: 2px 14px; border-radius: 20px; font-size: 0.75rem; font-weight: 500;
        }
        .news-item .news-title { flex: 1; font-size: 1rem; font-weight: 500; color: var(--text-primary); }
        .news-item .news-title a { color: inherit; }
        .news-item .news-title a:hover { color: var(--primary-light); }
        .news-item .news-date { font-size: 0.85rem; color: var(--text-light); white-space: nowrap; }
        .news-empty {
            text-align: center; padding: 48px 20px; background: var(--bg-card); border-radius: var(--radius-md);
            color: var(--text-light); font-size: 1rem; border: 1px dashed var(--border-color);
        }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 28px 20px; text-align: center;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); transition: var(--transition);
        }
        .stat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .stat-card .stat-num { font-size: 2.4rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-card .stat-label { font-size: 0.9rem; color: var(--text-secondary); margin-top: 6px; }
        .stat-card .stat-icon { font-size: 2rem; color: var(--secondary); margin-bottom: 12px; }

        /* ===== 使用流程 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; counter-reset: step; }
        .step-card {
            background: var(--bg-card); border-radius: var(--radius-md); padding: 32px 20px 28px; text-align: center;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); position: relative; transition: var(--transition);
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .step-card .step-num {
            width: 48px; height: 48px; background: var(--primary); color: #fff; border-radius: 50%;
            display: flex; align-items: center; justify-content: center; font-size: 1.3rem; font-weight: 700;
            margin: 0 auto 16px; position: relative; z-index: 1;
        }
        .step-card .step-num::after {
            content: ""; position: absolute; inset: -4px; border-radius: 50%; border: 2px dashed var(--secondary); opacity: 0.4;
        }
        .step-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); margin: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-sm); border: 1px solid var(--border-color);
            overflow: hidden; transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            padding: 18px 24px; font-weight: 600; font-size: 1rem; color: var(--text-primary);
            display: flex; align-items: center; justify-content: space-between; cursor: pointer;
            background: none; border: none; width: 100%; text-align: left; transition: var(--transition);
        }
        .faq-question i { font-size: 1.1rem; color: var(--primary); transition: transform var(--transition); }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7;
        }
        .faq-answer p { margin: 0; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 72px 0; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ""; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.10; mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 2; }
        .cta-content h2 { color: #fff; font-size: 2rem; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.8); max-width: 580px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-content .btn-primary-custom { background: #fff; color: var(--primary); box-shadow: 0 4px 20px rgba(0,0,0,0.15); }
        .cta-content .btn-primary-custom:hover { background: var(--secondary); color: #1a2332; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-sidebar); color: var(--text-sidebar); padding: 48px 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .brand-text { font-size: 1.2rem; font-weight: 700; color: var(--text-white); margin-bottom: 12px; display: block; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.5); max-width: 300px; }
        .footer-col h5 { color: var(--text-white); font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--secondary); }
        .footer-bottom {
            margin-top: 40px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,0.06);
            text-align: center; font-size: 0.85rem; color: rgba(255,255,255,0.3);
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--secondary); }

        /* ===== 响应式断点 ===== */
        @media (max-width: 1199.98px) {
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 991.98px) {
            .sidebar { transform: translateX(-100%); }
            .sidebar.open { transform: translateX(0); }
            .sidebar-overlay.active { display: block; }
            .main-content { margin-left: 0; padding-top: 64px; }
            .mobile-topbar { display: flex; }
            .hero-section { padding: 70px 0 80px; min-height: 380px; }
            .hero-title { font-size: 2.2rem; }
            .category-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand p { max-width: 100%; }
        }
        @media (max-width: 767.98px) {
            .hero-title { font-size: 1.8rem; }
            .hero-desc { font-size: 1rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .btn-primary-custom, .btn-outline-custom { justify-content: center; }
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 32px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .stat-card { padding: 20px 16px; }
            .stat-card .stat-num { font-size: 1.8rem; }
            .steps-grid { grid-template-columns: 1fr; gap: 16px; }
            .news-item { flex-direction: column; align-items: flex-start; gap: 8px; }
            .news-item .news-meta { width: 100%; }
            .news-item .news-date { margin-left: auto; }
            .faq-question { font-size: 0.95rem; padding: 14px 18px; }
            .faq-answer { padding: 0 18px 14px; }
            .cta-section { padding: 48px 0; }
            .cta-content h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.5rem; }
            .hero-badge { font-size: 0.75rem; padding: 4px 14px; }
            .container { padding: 0 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .category-card .card-img { height: 160px; }
            .category-card .card-body { padding: 20px 18px 18px; }
            .sidebar { width: 260px; }
        }

        /* ===== 工具类 ===== */
        .text-secondary-custom { color: var(--secondary); }
        .bg-alt { background: var(--bg-white); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .mt-1 { margin-top: 4px; }
        .mb-1 { margin-bottom: 4px; }

        /* ===== 滚动条 ===== */
        .sidebar-nav::-webkit-scrollbar { width: 4px; }
        .sidebar-nav::-webkit-scrollbar-track { background: transparent; }
        .sidebar-nav::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 4px; }

        /* ===== 文章卡片内页通用 ===== */
        .page-banner {
            position: relative; padding: 64px 0 56px; background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            overflow: hidden;
        }
        .page-banner::before {
            content: ""; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.12; mix-blend-mode: overlay;
        }
        .page-banner h1 { color: #fff; position: relative; z-index: 2; font-size: 2rem; }
        .page-banner p { color: rgba(255,255,255,0.8); position: relative; z-index: 2; max-width: 600px; margin-top: 8px; }
        .breadcrumb-custom { display: flex; gap: 8px; font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-bottom: 12px; position: relative; z-index: 2; }
        .breadcrumb-custom a { color: rgba(255,255,255,0.7); }
        .breadcrumb-custom a:hover { color: #fff; }
        .breadcrumb-custom span { color: rgba(255,255,255,0.9); }

        /* ===== 分类页卡片列表 ===== */
        .article-card {
            background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden;
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-color); transition: var(--transition);
            display: flex; flex-direction: column; height: 100%;
        }
        .article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .article-card .card-img-top { height: 180px; object-fit: cover; }
        .article-card .card-body { padding: 20px 22px 16px; flex: 1; }
        .article-card .card-body .tag { display: inline-block; background: var(--bg-body); padding: 2px 12px; border-radius: 20px; font-size: 0.75rem; color: var(--text-light); margin-bottom: 8px; }
        .article-card .card-body h5 { font-size: 1.05rem; margin-bottom: 8px; }
        .article-card .card-body h5 a { color: inherit; }
        .article-card .card-body h5 a:hover { color: var(--primary-light); }
        .article-card .card-body p { font-size: 0.9rem; color: var(--text-secondary); }
        .article-card .card-footer { padding: 12px 22px; border-top: 1px solid var(--border-light); background: var(--bg-body); display: flex; justify-content: space-between; align-items: center; font-size: 0.85rem; color: var(--text-light); }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0e1f33;
            --accent: #e8a838;
            --accent-light: #f0c060;
            --accent-dark: #c88a1e;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-muted: #eef2f7;
            --text-primary: #1a2a3a;
            --text-body: #3d4f5e;
            --text-muted: #7a8a9a;
            --text-light: #aab5c0;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --sidebar-width: 260px;
            --header-height: 64px;
            --transition: 0.25s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
        }

        /* ===== 基础重置 ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        /* ===== 布局 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--primary-dark);
            color: var(--text-white);
            display: flex;
            flex-direction: column;
            z-index: 1050;
            transition: transform var(--transition);
            overflow-y: auto;
            border-right: 1px solid rgba(255, 255, 255, 0.05);
        }
        .sidebar-brand {
            padding: 28px 22px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .sidebar-brand .brand-icon {
            width: 40px;
            height: 40px;
            background: var(--accent);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--primary-dark);
            flex-shrink: 0;
        }
        .sidebar-brand .brand-text {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.3;
        }
        .sidebar-nav {
            padding: 16px 14px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 13px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1.1rem;
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-white);
        }
        .sidebar-nav .nav-item.active {
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(232, 168, 56, 0.35);
        }
        .sidebar-footer {
            padding: 18px 22px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        /* 主内容区 */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: 100%;
        }

        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--primary-dark);
            color: var(--text-white);
            z-index: 1060;
            align-items: center;
            justify-content: space-between;
            padding: 0 18px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
        }
        .mobile-header .mb-brand {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-white);
        }
        .mobile-header .menu-toggle {
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.6rem;
            padding: 4px 8px;
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .mobile-header .menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* 移动端遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1045;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .sidebar-overlay.show {
            opacity: 1;
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            position: relative;
            padding: 80px 40px 90px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-blend-mode: overlay;
            color: var(--text-white);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 31, 51, 0.88) 0%, rgba(26, 58, 92, 0.72) 60%, rgba(232, 168, 56, 0.18) 100%);
            z-index: 1;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }
        .page-hero .hero-sub {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin-bottom: 28px;
            line-height: 1.6;
        }
        .page-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--accent-light);
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .page-hero .hero-badge i {
            font-size: 0.9rem;
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 70px 40px;
        }
        .section-block .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .section-block .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .section-block .section-sub {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin-bottom: 40px;
        }
        .section-block .section-title-center {
            text-align: center;
        }
        .section-block .section-sub-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-block.bg-muted {
            background: var(--bg-muted);
        }
        .section-block.bg-white {
            background: var(--bg-white);
        }
        .section-block.bg-dark {
            background: var(--primary-dark);
            color: var(--text-white);
        }
        .section-block.bg-dark .section-title {
            color: var(--text-white);
        }
        .section-block.bg-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== 卡片 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-custom .card-body {
            padding: 28px 24px;
        }
        .card-custom .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--bg-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 16px;
            transition: background var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card-custom .card-text {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .card-custom .card-img-top {
            height: 180px;
            object-fit: cover;
            border-bottom: 1px solid var(--border);
        }
        .card-custom .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            background: var(--bg-muted);
            color: var(--text-muted);
            margin-bottom: 10px;
        }
        .card-custom .card-footer-link {
            padding: 16px 24px;
            border-top: 1px solid var(--border);
            background: var(--bg-muted);
        }
        .card-custom .card-footer-link a {
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--primary-light);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .card-custom .card-footer-link a:hover {
            color: var(--accent);
        }

        /* ===== 步骤流程 ===== */
        .step-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            background: var(--bg-white);
            padding: 24px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            counter-increment: step-counter;
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--accent);
        }
        .step-item .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: var(--text-white);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
        }
        .step-item .step-number::before {
            content: counter(step-counter);
        }
        .step-item .step-content {
            flex: 1;
        }
        .step-item .step-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 4px;
            color: var(--text-primary);
        }
        .step-item .step-content p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== 标签 ===== */
        .badge-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 500;
            background: var(--bg-muted);
            color: var(--text-muted);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .badge-tag:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .badge-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .badge-accent {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }

        /* ===== 按钮 ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 30px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            transition: all var(--transition);
            cursor: pointer;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-custom:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            text-decoration: none;
        }
        .btn-primary-custom {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .btn-primary-custom:hover {
            background: var(--accent-light);
            color: var(--primary-dark);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.4);
        }
        .btn-outline-custom {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        .btn-outline-custom:hover {
            background: var(--text-white);
            color: var(--primary-dark);
            border-color: var(--text-white);
        }
        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline-dark:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        /* ===== FAQ ===== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent);
        }
        .faq-item .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-item .faq-question:hover {
            background: var(--bg-muted);
        }
        .faq-item .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-block {
            text-align: center;
            padding: 70px 40px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(14, 31, 51, 0.85) 0%, rgba(26, 58, 92, 0.7) 100%);
            z-index: 1;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-block p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 1.05rem;
            max-width: 520px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-group-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 50px 40px 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .site-footer .container {
            max-width: 1200px;
            margin: 0 auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .site-footer .footer-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            display: block;
            margin-bottom: 10px;
        }
        .site-footer .footer-brand p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.6;
            max-width: 320px;
        }
        .site-footer .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 8px;
            font-size: 0.88rem;
        }
        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .site-footer .footer-col ul li a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== 安全提示区块 ===== */
        .alert-tip {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            background: #fff9e6;
            border: 1px solid #f0dca0;
            color: #7a6b3a;
        }
        .alert-tip i {
            font-size: 1.3rem;
            color: var(--accent-dark);
            flex-shrink: 0;
            margin-top: 2px;
        }
        .alert-tip .tip-content {
            font-size: 0.92rem;
            line-height: 1.6;
        }
        .alert-tip .tip-content strong {
            color: var(--primary-dark);
        }

        /* ===== 统计数字 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
        }
        .stat-item .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .sidebar-overlay {
                display: block;
                pointer-events: none;
            }
            .sidebar-overlay.show {
                pointer-events: auto;
            }
            .main-content {
                padding-top: var(--header-height);
            }
            .page-hero {
                padding: 60px 24px 70px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .section-block {
                padding: 50px 24px;
            }
            .section-block .section-title {
                font-size: 1.6rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-sub {
                font-size: 1rem;
            }
            .section-block .section-title {
                font-size: 1.35rem;
            }
            .section-block .section-sub {
                font-size: 0.95rem;
            }
            .step-item {
                flex-direction: column;
                padding: 20px;
            }
            .step-item .step-number {
                width: 40px;
                height: 40px;
                font-size: 1rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cta-block {
                padding: 50px 24px;
            }
            .cta-block h2 {
                font-size: 1.4rem;
            }
            .btn-custom {
                padding: 10px 22px;
                font-size: 0.88rem;
            }
            .card-custom .card-body {
                padding: 20px 18px;
            }
            .faq-item .faq-question {
                padding: 14px 18px;
                font-size: 0.92rem;
            }
            .faq-item .faq-answer {
                padding: 0 18px 14px;
                font-size: 0.86rem;
            }
            .alert-tip {
                flex-direction: column;
                gap: 10px;
                padding: 16px 18px;
            }
            .section-block {
                padding: 40px 18px;
            }
            .page-hero {
                padding: 40px 18px 50px;
            }
            .site-footer {
                padding: 36px 18px 24px;
            }
            .sidebar-brand {
                padding: 20px 16px 14px;
            }
            .sidebar-nav {
                padding: 12px 10px;
            }
            .sidebar-nav .nav-item {
                padding: 11px 14px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 18px 12px;
            }
            .stat-item .stat-number {
                font-size: 1.3rem;
            }
            .page-hero h1 {
                font-size: 1.3rem;
            }
            .page-hero .hero-sub {
                font-size: 0.9rem;
            }
            .section-block .section-title {
                font-size: 1.15rem;
            }
            .btn-group-cta {
                flex-direction: column;
                align-items: center;
            }
            .btn-custom {
                width: 100%;
                justify-content: center;
            }
            .card-custom .card-img-top {
                height: 140px;
            }
        }

        /* ===== 辅助 ===== */
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-1 {
            margin-top: 8px;
        }
        .mt-2 {
            margin-top: 16px;
        }
        .mt-3 {
            margin-top: 24px;
        }
        .gap-2 {
            gap: 16px;
        }
        .gap-3 {
            gap: 24px;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .d-flex {
            display: flex;
        }
        .align-center {
            align-items: center;
        }
        .text-center {
            text-align: center;
        }

        /* 特性网格 */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .feature-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 内容网格 */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        @media (max-width: 768px) {
            .content-grid {
                grid-template-columns: 1fr;
            }
        }

        /* 平台简介图文 */
        .intro-wrap {
            display: flex;
            gap: 48px;
            align-items: center;
        }
        .intro-wrap .intro-image {
            flex: 0 0 380px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }
        .intro-wrap .intro-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .intro-wrap .intro-text {
            flex: 1;
        }
        .intro-wrap .intro-text h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .intro-wrap .intro-text p {
            color: var(--text-muted);
            line-height: 1.7;
        }
        @media (max-width: 1024px) {
            .intro-wrap {
                flex-direction: column;
                gap: 28px;
            }
            .intro-wrap .intro-image {
                flex: 0 0 auto;
                width: 100%;
                max-width: 500px;
            }
        }
        @media (max-width: 520px) {
            .intro-wrap .intro-image img {
                height: 200px;
            }
        }

/* roulang page: article */
:root {
            --primary: #0f3b5e;
            --primary-light: #1a5a8a;
            --primary-dark: #0a2a44;
            --secondary: #e8a838;
            --secondary-light: #f0c060;
            --accent: #2ecc71;
            --bg-body: #f5f7fa;
            --bg-card: #ffffff;
            --bg-sidebar: #0f3b5e;
            --text-primary: #1a2a3a;
            --text-secondary: #4a5a6a;
            --text-muted: #7a8a9a;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --font-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: all 0.25s ease;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font-base);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            display: flex;
            min-height: 100vh;
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }

        /* 左侧导航 */
        .sidebar {
            width: 260px;
            min-height: 100vh;
            background: var(--bg-sidebar);
            color: #fff;
            display: flex;
            flex-direction: column;
            position: fixed;
            left: 0; top: 0; bottom: 0;
            z-index: 1050;
            box-shadow: 2px 0 20px rgba(0,0,0,0.15);
            transition: var(--transition);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            text-align: center;
        }
        .sidebar-brand .brand-text {
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            letter-spacing: 0.5px;
            display: block;
            line-height: 1.4;
        }
        .sidebar-brand .brand-sub {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.55);
            margin-top: 4px;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            text-decoration: none;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: rgba(255,255,255,0.5);
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255,255,255,0.1);
            color: #fff;
        }
        .sidebar-nav .nav-item.active {
            background: var(--secondary);
            color: #1a2a3a;
            font-weight: 600;
        }
        .sidebar-nav .nav-item.active i {
            color: #1a2a3a;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.75rem;
            color: rgba(255,255,255,0.4);
            text-align: center;
        }

        /* 主内容区域 */
        .main-content {
            margin-left: 260px;
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* 移动端顶部栏 */
        .mobile-header {
            display: none;
            background: var(--bg-sidebar);
            color: #fff;
            padding: 14px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 1040;
            box-shadow: 0 2px 12px rgba(0,0,0,0.12);
        }
        .mobile-header .brand-text {
            font-size: 1rem;
            font-weight: 700;
        }
        .mobile-toggle {
            background: none;
            border: none;
            color: #fff;
            font-size: 1.4rem;
            cursor: pointer;
            padding: 4px 8px;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0,0,0,0.45);
            z-index: 1045;
        }

        /* 文章 banner */
        .article-banner {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            color: #fff;
            position: relative;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .article-banner .container { position: relative; z-index: 2; }
        .article-banner .breadcrumb {
            background: transparent;
            padding: 0;
            margin-bottom: 20px;
            font-size: 0.9rem;
        }
        .article-banner .breadcrumb-item a { color: rgba(255,255,255,0.7); }
        .article-banner .breadcrumb-item.active { color: var(--secondary); }
        .article-banner .breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,0.4); }
        .article-banner h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 16px;
            max-width: 800px;
        }
        .article-banner .meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.95rem;
            color: rgba(255,255,255,0.75);
        }
        .article-banner .meta i { margin-right: 6px; color: var(--secondary); }
        .article-banner .meta .category-tag {
            background: var(--secondary);
            color: #1a2a3a;
            padding: 2px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* 文章主体 */
        .article-body {
            padding: 50px 0 60px;
            flex: 1;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }
        .article-content p {
            margin-bottom: 1.4em;
            font-size: 1.05rem;
            color: var(--text-secondary);
        }
        .article-content h2, .article-content h3 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            font-weight: 700;
            color: var(--text-primary);
        }
        .article-content h2 { font-size: 1.6rem; }
        .article-content h3 { font-size: 1.25rem; }
        .article-content ul, .article-content ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
            color: var(--text-secondary);
        }
        .article-content li { margin-bottom: 0.5em; }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.6em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content blockquote {
            border-left: 4px solid var(--secondary);
            background: #fefaf0;
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content code {
            background: #f0f2f5;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary);
        }
        .article-content a { text-decoration: underline; }

        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i { font-size: 3rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 12px; }
        .not-found-box p { color: var(--text-secondary); margin-bottom: 20px; }
        .not-found-box .btn { padding: 10px 32px; border-radius: 50px; }

        /* 文章底部导航 */
        .article-footer-nav {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
        }
        .article-footer-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: var(--bg-body);
            transition: var(--transition);
        }
        .article-footer-nav a:hover {
            background: var(--primary);
            color: #fff;
        }

        /* 页脚 */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.8);
            padding: 48px 0 28px;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 32px;
        }
        .site-footer .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: block;
            margin-bottom: 10px;
        }
        .site-footer p { font-size: 0.9rem; color: rgba(255,255,255,0.6); line-height: 1.7; }
        .site-footer h5 {
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer ul { list-style: none; padding: 0; margin: 0; }
        .site-footer ul li { margin-bottom: 10px; font-size: 0.9rem; }
        .site-footer ul li a { color: rgba(255,255,255,0.6); transition: var(--transition); }
        .site-footer ul li a:hover { color: var(--secondary); padding-left: 4px; }
        .site-footer ul li i { color: var(--secondary); width: 18px; }
        .site-footer .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.45);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .sidebar { width: 220px; }
            .main-content { margin-left: 220px; }
            .article-banner h1 { font-size: 1.8rem; }
        }
        @media (max-width: 820px) {
            .sidebar { transform: translateX(-100%); width: 260px; }
            .sidebar.open { transform: translateX(0); }
            .main-content { margin-left: 0; }
            .mobile-header { display: flex; }
            .mobile-overlay.active { display: block; }
            .article-banner { padding: 40px 0 36px; }
            .article-banner h1 { font-size: 1.5rem; }
            .article-content { padding: 28px 20px; }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-banner h1 { font-size: 1.25rem; }
            .article-banner .meta { gap: 12px; font-size: 0.85rem; }
            .article-content { padding: 20px 16px; }
            .article-content p { font-size: 1rem; }
            .site-footer .footer-grid { grid-template-columns: 1fr; }
            .site-footer { padding: 32px 0 20px; }
            .article-footer-nav { flex-direction: column; align-items: stretch; }
            .article-footer-nav a { justify-content: center; }
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f2b4b;
            --primary-light: #1a3f66;
            --primary-dark: #091d33;
            --accent: #c9a84c;
            --accent-light: #dfc26a;
            --accent-dark: #b08e3a;
            --bg-light: #f8f7f4;
            --bg-card: #ffffff;
            --bg-dark: #0f2b4b;
            --text-dark: #1a1a2e;
            --text-body: #3d3d4a;
            --text-muted: #7a7a8a;
            --text-light: #f0efe8;
            --border-color: #e4e2dc;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(15, 43, 75, 0.06);
            --shadow-md: 0 6px 24px rgba(15, 43, 75, 0.08);
            --shadow-lg: 0 16px 48px rgba(15, 43, 75, 0.12);
            --shadow-accent: 0 6px 20px rgba(201, 168, 76, 0.25);
            --transition: 0.25s ease;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --nav-width: 240px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-family);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            display: flex;
            min-height: 100vh;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent-dark);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 600;
        }

        /* ===== Container ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* ===== Sidebar Navigation ===== */
        .sidebar {
            width: var(--nav-width);
            min-height: 100vh;
            background: var(--primary);
            color: var(--text-light);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            z-index: 1050;
            transition: transform var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
        }
        .sidebar-brand {
            padding: 28px 20px 20px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .sidebar-brand .brand-text {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: 0.5px;
            display: block;
            line-height: 1.3;
        }
        .sidebar-brand .brand-sub {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 4px;
            letter-spacing: 0.3px;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.92rem;
            font-weight: 500;
            transition: all var(--transition);
            text-decoration: none;
        }
        .sidebar-nav .nav-item i {
            width: 20px;
            text-align: center;
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.4);
            transition: color var(--transition);
        }
        .sidebar-nav .nav-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
        }
        .sidebar-nav .nav-item:hover i {
            color: var(--accent-light);
        }
        .sidebar-nav .nav-item.active {
            background: rgba(201, 168, 76, 0.15);
            color: var(--accent);
            font-weight: 600;
        }
        .sidebar-nav .nav-item.active i {
            color: var(--accent);
        }
        .sidebar-footer {
            padding: 16px 20px 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.7rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        /* ===== Main Content Area ===== */
        .main-content {
            margin-left: var(--nav-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== Mobile Nav Toggle ===== */
        .nav-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1060;
            background: var(--primary);
            color: var(--accent);
            border: none;
            border-radius: var(--radius-sm);
            width: 44px;
            height: 44px;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: var(--shadow-md);
            transition: background var(--transition);
            align-items: center;
            justify-content: center;
        }
        .nav-toggle:hover {
            background: var(--primary-light);
        }
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 1045;
        }

        /* ===== Page Hero ===== */
        .page-hero {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .page-hero .breadcrumb-custom {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 16px;
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }
        .page-hero .breadcrumb-custom a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
        }
        .page-hero .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .page-hero .breadcrumb-custom span {
            color: rgba(255, 255, 255, 0.3);
        }
        .page-hero h1 {
            font-size: 2.6rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .page-hero h1 i {
            color: var(--accent);
            margin-right: 10px;
        }
        .page-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.75);
            max-width: 640px;
            line-height: 1.8;
        }
        .page-hero .hero-badge {
            display: inline-block;
            background: rgba(201, 168, 76, 0.18);
            color: var(--accent-light);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(201, 168, 76, 0.2);
            margin-bottom: 14px;
        }

        /* ===== Sections ===== */
        .section-block {
            padding: 70px 0;
        }
        .section-block.bg-white {
            background: #fff;
        }
        .section-block.bg-light {
            background: var(--bg-light);
        }
        .section-block.bg-dark {
            background: var(--bg-dark);
            color: var(--text-light);
        }
        .section-block.bg-dark h2,
        .section-block.bg-dark h3,
        .section-block.bg-dark .section-title {
            color: #fff;
        }
        .section-block.bg-dark .text-muted-custom {
            color: rgba(255, 255, 255, 0.6);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .section-block.bg-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .title-accent {
            display: inline-block;
            width: 48px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
            margin-bottom: 16px;
        }

        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            padding: 28px 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card-custom:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .card-custom .card-icon {
            width: 52px;
            height: 52px;
            background: rgba(201, 168, 76, 0.1);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-dark);
            margin-bottom: 18px;
            transition: background var(--transition);
        }
        .card-custom:hover .card-icon {
            background: var(--accent);
            color: #fff;
        }
        .card-custom h5 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-custom p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }
        .card-custom .card-tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--text-muted);
            padding: 2px 12px;
            border-radius: 30px;
            font-size: 0.75rem;
            font-weight: 500;
            margin-top: 12px;
            border: 1px solid var(--border-color);
        }

        /* ===== Cover Card ===== */
        .cover-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: #fff;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            height: 100%;
        }
        .cover-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
        }
        .cover-card .cover-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .cover-card .cover-body {
            padding: 20px 20px 24px;
        }
        .cover-card .cover-body h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .cover-card .cover-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 12px;
            line-height: 1.6;
        }
        .cover-card .cover-body .cover-link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .cover-card .cover-body .cover-link:hover {
            color: var(--accent-dark);
        }

        /* ===== Stats ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius-md);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: background var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
        }
        .stat-item .stat-label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 6px;
        }

        /* ===== Steps / Process ===== */
        .step-item {
            display: flex;
            gap: 20px;
            margin-bottom: 32px;
            align-items: flex-start;
        }
        .step-item:last-child {
            margin-bottom: 0;
        }
        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-content h5 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .step-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 18px 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-question {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 4px 0;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-dark);
        }
        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding-top: 10px;
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 60px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            mix-blend-mode: overlay;
        }
        .cta-section .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .btn-cta {
            display: inline-block;
            padding: 14px 40px;
            border-radius: 40px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            box-shadow: var(--shadow-accent);
        }
        .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(201, 168, 76, 0.35);
            color: var(--primary-dark);
        }
        .btn-cta i {
            margin-right: 8px;
        }

        /* ===== Buttons ===== */
        .btn-outline-accent {
            display: inline-block;
            padding: 10px 28px;
            border-radius: 30px;
            border: 2px solid var(--accent);
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            background: transparent;
            text-decoration: none;
        }
        .btn-outline-accent:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.65);
            padding: 48px 0 24px;
            margin-top: auto;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .site-footer .brand-text {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--accent);
            display: block;
            margin-bottom: 8px;
        }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            line-height: 1.6;
            max-width: 260px;
        }
        .site-footer h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer ul li {
            margin-bottom: 8px;
            font-size: 0.85rem;
        }
        .site-footer ul li a {
            color: rgba(255, 255, 255, 0.55);
            transition: color var(--transition);
            text-decoration: none;
        }
        .site-footer ul li a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 20px;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.3);
            text-align: center;
        }

        /* ===== Tags ===== */
        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-item {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 30px;
            background: var(--bg-light);
            color: var(--text-body);
            font-size: 0.82rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            text-decoration: none;
        }
        .tag-item:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .nav-overlay.open {
                display: block;
            }
            .nav-toggle {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
            .page-hero {
                padding: 100px 0 50px;
                min-height: 220px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero p {
                font-size: 0.95rem;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .cover-card .cover-img {
                height: 160px;
            }
            .container-custom {
                padding: 0 16px;
            }
            .sidebar-brand .brand-text {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .page-hero p {
                font-size: 0.88rem;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
            .card-custom {
                padding: 20px 16px;
            }
            .btn-cta {
                padding: 12px 28px;
                font-size: 0.9rem;
            }
            .step-item {
                gap: 14px;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 0.95rem;
            }
            .cover-card .cover-img {
                height: 130px;
            }
            .tag-item {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== Accessibility ===== */
        a:focus-visible,
        button:focus-visible,
        .nav-item:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .text-muted-custom {
            color: var(--text-muted);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .gap-16 {
            gap: 16px;
        }
        .gap-24 {
            gap: 24px;
        }