/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #0f3b8e;
            --primary-light: #e8f0fe;
            --secondary: #0ea5e9;
            --accent: #f59e0b;
            --success: #10b981;
            --dark: #0f172a;
            --gray-900: #1e293b;
            --gray-700: #334155;
            --gray-500: #64748b;
            --gray-300: #cbd5e1;
            --gray-100: #f1f5f9;
            --white: #ffffff;
            --bg-light: #f8fafc;
            --bg-hero: #0b1120;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.12);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container-max: 1280px;
            --nav-height: 72px;
        }

        /* ===== 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: 16px;
            line-height: 1.7;
            color: var(--gray-700);
            background: var(--white);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--primary-dark); }
        a:focus-visible { outline: 3px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--dark); font-weight: 700; line-height: 1.3; }
        h1 { font-size: 2.75rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; }
        .container { max-width: var(--container-max); padding: 0 24px; margin: 0 auto; }
        @media (max-width: 768px) { .container { padding: 0 16px; } }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1050;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--nav-height); max-width: var(--container-max); margin: 0 auto; padding: 0 24px;
        }
        .site-logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.5rem; font-weight: 800; color: var(--dark); letter-spacing: -0.5px;
        }
        .site-logo i { color: var(--primary); font-size: 1.75rem; }
        .site-logo span { background: linear-gradient(135deg, var(--primary), var(--secondary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 4px; }
        .nav-list .nav-link {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500; color: var(--gray-700);
            transition: all var(--transition); position: relative;
        }
        .nav-list .nav-link i { font-size: 0.85rem; opacity: 0.7; }
        .nav-list .nav-link:hover { color: var(--primary); background: var(--primary-light); }
        .nav-list .nav-link.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-list .nav-link.active::after {
            content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
            width: 20px; height: 3px; border-radius: 2px; background: var(--primary);
        }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .nav-search { position: relative; }
        .nav-search input {
            width: 200px; padding: 8px 16px 8px 36px; border: 1px solid var(--border);
            border-radius: 50px; background: var(--gray-100); font-size: 0.9rem;
            transition: all var(--transition); color: var(--gray-700);
        }
        .nav-search input:focus { outline: none; border-color: var(--primary); background: var(--white); box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1); width: 240px; }
        .nav-search i { position: absolute; left: 14px; top: 50%; transform: translateY(-50%); color: var(--gray-500); font-size: 0.85rem; }
        .nav-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--dark); cursor: pointer; padding: 6px; border-radius: 6px; }
        .nav-toggle:hover { background: var(--gray-100); }

        /* 移动端导航 */
        @media (max-width: 992px) {
            .nav-list { display: none; }
            .nav-list.open {
                display: flex; flex-direction: column; position: absolute; top: var(--nav-height); left: 0; width: 100%;
                background: var(--white); border-bottom: 1px solid var(--border);
                padding: 16px 24px; gap: 6px; box-shadow: var(--shadow);
            }
            .nav-list.open .nav-link { width: 100%; padding: 12px 16px; }
            .nav-list.open .nav-link.active::after { display: none; }
            .nav-search { display: none; }
            .nav-toggle { display: block; }
            .header-inner { padding: 0 16px; }
        }
        @media (max-width: 576px) {
            .site-logo { font-size: 1.25rem; }
            .site-logo i { font-size: 1.4rem; }
        }

        /* ===== Hero ===== */
        .hero {
            margin-top: var(--nav-height);
            min-height: 85vh;
            display: flex; align-items: center; justify-content: center;
            background: var(--bg-hero) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            position: relative; overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(11, 17, 32, 0.88) 0%, rgba(11, 17, 32, 0.72) 50%, rgba(11, 17, 32, 0.60) 100%);
        }
        .hero::after {
            content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 120px;
            background: linear-gradient(to top, var(--white), transparent);
        }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 900px; padding: 80px 24px 100px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(255, 255, 255, 0.08); border: 1px solid rgba(255, 255, 255, 0.15);
            padding: 6px 20px; border-radius: 50px; font-size: 0.85rem; color: rgba(255, 255, 255, 0.8);
            margin-bottom: 28px; backdrop-filter: blur(4px);
        }
        .hero-badge i { color: var(--accent); }
        .hero h1 { font-size: 3.5rem; font-weight: 800; color: var(--white); margin-bottom: 20px; letter-spacing: -1px; line-height: 1.15; }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--secondary), var(--accent)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.2rem; color: rgba(255, 255, 255, 0.75); max-width: 680px; margin: 0 auto 36px; line-height: 1.8; }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero-actions .btn { padding: 14px 36px; border-radius: 50px; font-weight: 600; font-size: 1rem; transition: all var(--transition); }
        .hero-actions .btn-primary { background: var(--primary); border: none; color: var(--white); box-shadow: 0 4px 16px rgba(26, 86, 219, 0.35); }
        .hero-actions .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(26, 86, 219, 0.45); }
        .hero-actions .btn-outline-light { background: transparent; border: 2px solid rgba(255, 255, 255, 0.3); color: var(--white); }
        .hero-actions .btn-outline-light:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.6); transform: translateY(-2px); }
        .hero-stats { display: flex; gap: 48px; justify-content: center; margin-top: 60px; flex-wrap: wrap; }
        .hero-stat { text-align: center; }
        .hero-stat .num { font-size: 2.2rem; font-weight: 800; color: var(--white); line-height: 1.2; }
        .hero-stat .num small { font-size: 1rem; font-weight: 400; color: rgba(255, 255, 255, 0.5); }
        .hero-stat .label { font-size: 0.9rem; color: rgba(255, 255, 255, 0.5); margin-top: 4px; }
        @media (max-width: 768px) {
            .hero { min-height: 70vh; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 28px; }
            .hero-stat .num { font-size: 1.6rem; }
        }
        @media (max-width: 576px) {
            .hero h1 { font-size: 1.8rem; }
            .hero-actions .btn { padding: 12px 24px; font-size: 0.9rem; }
        }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-light); }
        .section-dark { background: var(--dark); color: rgba(255, 255, 255, 0.75); }
        .section-dark h2, .section-dark h3 { color: var(--white); }
        .section-header { text-align: center; margin-bottom: 52px; }
        .section-header h2 { margin-bottom: 12px; position: relative; display: inline-block; }
        .section-header h2::after { content: ''; display: block; width: 50px; height: 4px; border-radius: 2px; background: var(--primary); margin: 16px auto 0; }
        .section-header p { color: var(--gray-500); max-width: 600px; margin: 12px auto 0; font-size: 1.05rem; }
        @media (max-width: 768px) { .section { padding: 56px 0; } }

        /* ===== 品牌介绍 ===== */
        .brand-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .brand-card {
            background: var(--white); border: 1px solid var(--border);
            border-radius: var(--radius); padding: 36px 28px;
            transition: all var(--transition); text-align: center;
        }
        .brand-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
        .brand-card .icon-wrap {
            width: 64px; height: 64px; border-radius: 16px;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; font-size: 1.6rem; color: var(--white);
        }
        .brand-card:nth-child(1) .icon-wrap { background: linear-gradient(135deg, var(--primary), var(--secondary)); }
        .brand-card:nth-child(2) .icon-wrap { background: linear-gradient(135deg, var(--secondary), #06b6d4); }
        .brand-card:nth-child(3) .icon-wrap { background: linear-gradient(135deg, var(--accent), #f97316); }
        .brand-card h3 { margin-bottom: 12px; }
        .brand-card p { color: var(--gray-500); font-size: 0.95rem; margin-bottom: 0; }
        @media (max-width: 992px) { .brand-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 576px) { .brand-grid { grid-template-columns: 1fr; } }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            position: relative; border-radius: var(--radius); overflow: hidden;
            min-height: 320px; display: flex; align-items: flex-end;
            background: var(--dark); transition: all var(--transition);
        }
        .category-card img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .category-card:hover img { transform: scale(1.05); }
        .category-card .overlay {
            position: absolute; inset: 0;
            background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.2) 60%, transparent 100%);
        }
        .category-card .card-body { position: relative; z-index: 2; padding: 36px 28px; width: 100%; }
        .category-card .tag {
            display: inline-block; padding: 4px 14px; border-radius: 50px;
            font-size: 0.8rem; font-weight: 600; background: rgba(255,255,255,0.12);
            color: rgba(255,255,255,0.9); margin-bottom: 10px; border: 1px solid rgba(255,255,255,0.15);
        }
        .category-card h3 { color: var(--white); margin-bottom: 8px; font-size: 1.5rem; }
        .category-card p { color: rgba(255,255,255,0.7); font-size: 0.95rem; margin-bottom: 16px; max-width: 380px; }
        .category-card .btn-link { color: var(--white); font-weight: 600; padding: 0; border: none; background: none; display: inline-flex; align-items: center; gap: 6px; }
        .category-card .btn-link:hover { color: var(--secondary); gap: 12px; }
        @media (max-width: 768px) { .category-grid { grid-template-columns: 1fr; } .category-card { min-height: 260px; } }

        /* ===== 资讯列表（CMS） ===== */
        .post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
        .post-card {
            background: var(--white); border: 1px solid var(--border);
            border-radius: var(--radius); overflow: hidden;
            transition: all var(--transition);
        }
        .post-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: transparent; }
        .post-card .thumb { width: 100%; height: 200px; object-fit: cover; background: var(--gray-100); }
        .post-card .body { padding: 20px 22px 24px; }
        .post-card .meta { display: flex; align-items: center; gap: 12px; font-size: 0.85rem; color: var(--gray-500); margin-bottom: 10px; }
        .post-card .meta .badge-cat { background: var(--primary-light); color: var(--primary); padding: 2px 12px; border-radius: 50px; font-weight: 500; font-size: 0.8rem; }
        .post-card h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .post-card h4 a { color: var(--dark); }
        .post-card h4 a:hover { color: var(--primary); }
        .post-card p { color: var(--gray-500); font-size: 0.9rem; margin-bottom: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-empty { text-align: center; padding: 60px 20px; color: var(--gray-500); background: var(--gray-100); border-radius: var(--radius); grid-column: 1 / -1; }
        .post-empty i { font-size: 2.4rem; color: var(--gray-300); margin-bottom: 16px; display: block; }
        @media (max-width: 992px) { .post-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 576px) { .post-grid { grid-template-columns: 1fr; } .post-card .thumb { height: 180px; } }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; text-align: center; }
        .stat-item { padding: 32px 16px; background: rgba(255,255,255,0.04); border-radius: var(--radius); border: 1px solid rgba(255,255,255,0.06); }
        .stat-item .num { font-size: 2.6rem; font-weight: 800; color: var(--white); line-height: 1.2; }
        .stat-item .num span { color: var(--secondary); }
        .stat-item .label { font-size: 0.95rem; color: rgba(255,255,255,0.5); margin-top: 6px; }
        @media (max-width: 992px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 576px) { .stats-grid { grid-template-columns: 1fr; } .stat-item .num { font-size: 2rem; } }

        /* ===== 流程 ===== */
        .flow-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; position: relative; }
        .flow-grid::before {
            content: ''; position: absolute; top: 40px; left: 12%; width: 76%; height: 2px;
            background: linear-gradient(to right, var(--primary), var(--secondary), var(--accent));
            z-index: 0;
        }
        .flow-step { text-align: center; position: relative; z-index: 1; padding: 0 12px; }
        .flow-step .step-num {
            width: 56px; height: 56px; border-radius: 50%;
            display: flex; align-items: center; justify-content: center;
            margin: 0 auto 20px; font-size: 1.3rem; font-weight: 700; color: var(--white);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            box-shadow: 0 8px 24px rgba(26, 86, 219, 0.3);
            position: relative; z-index: 2;
        }
        .flow-step:nth-child(2) .step-num { background: linear-gradient(135deg, var(--secondary), #06b6d4); }
        .flow-step:nth-child(3) .step-num { background: linear-gradient(135deg, #06b6d4, var(--accent)); }
        .flow-step:nth-child(4) .step-num { background: linear-gradient(135deg, var(--accent), #f97316); }
        .flow-step h4 { font-size: 1.05rem; margin-bottom: 8px; color: var(--white); }
        .flow-step p { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-bottom: 0; }
        @media (max-width: 992px) { .flow-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; } .flow-grid::before { display: none; } }
        @media (max-width: 576px) { .flow-grid { grid-template-columns: 1fr; gap: 28px; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--border); border-radius: var(--radius-sm);
            margin-bottom: 12px; overflow: hidden; background: var(--white);
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 24px; cursor: pointer; font-weight: 600; color: var(--dark);
            background: none; border: none; width: 100%; text-align: left;
            font-size: 1rem; transition: background var(--transition);
        }
        .faq-question:hover { background: var(--gray-100); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer { padding: 0 24px 18px; color: var(--gray-500); font-size: 0.95rem; display: none; }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            border-radius: var(--radius-lg); padding: 64px 48px; text-align: center;
            position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; top: -50%; right: -20%; width: 400px; height: 400px;
            border-radius: 50%; background: rgba(255,255,255,0.04);
        }
        .cta-section::after {
            content: ''; position: absolute; bottom: -30%; left: -10%; width: 300px; height: 300px;
            border-radius: 50%; background: rgba(255,255,255,0.03);
        }
        .cta-section h2 { color: var(--white); font-size: 2rem; margin-bottom: 12px; position: relative; z-index: 1; }
        .cta-section p { color: rgba(255,255,255,0.75); max-width: 560px; margin: 0 auto 28px; position: relative; z-index: 1; font-size: 1.05rem; }
        .cta-section .btn { padding: 14px 40px; border-radius: 50px; font-weight: 600; font-size: 1rem; position: relative; z-index: 1; }
        .cta-section .btn-light { background: var(--white); color: var(--primary); border: none; }
        .cta-section .btn-light:hover { background: var(--gray-100); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.2); }
        .cta-section .btn-outline-light { background: transparent; border: 2px solid rgba(255,255,255,0.3); color: var(--white); margin-left: 16px; }
        .cta-section .btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: rgba(255,255,255,0.6); }
        @media (max-width: 768px) { .cta-section { padding: 40px 24px; } .cta-section h2 { font-size: 1.5rem; } }
        @media (max-width: 576px) { .cta-section .btn-outline-light { margin-left: 0; margin-top: 12px; } }

        /* ===== 页脚 ===== */
        .site-footer { background: var(--dark); color: rgba(255,255,255,0.6); padding: 48px 0 32px; border-top: 1px solid rgba(255,255,255,0.06); }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 32px; }
        .footer-brand .site-logo { margin-bottom: 12px; }
        .footer-brand .site-logo span { -webkit-text-fill-color: var(--white); color: var(--white); }
        .footer-brand p { font-size: 0.9rem; max-width: 320px; }
        .footer-col h4 { color: var(--white); font-size: 1rem; 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: color var(--transition); }
        .footer-col ul li a:hover { color: var(--white); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--white); }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.06); display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.5); transition: all var(--transition); }
        .footer-social a:hover { background: var(--primary); color: var(--white); }
        @media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 576px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== 工具类 ===== */
        .text-primary { color: var(--primary) !important; }
        .text-secondary { color: var(--secondary) !important; }
        .text-accent { color: var(--accent) !important; }
        .bg-primary-light { background: var(--primary-light); }
        .gap-2 { gap: 8px; }
        .gap-3 { gap: 16px; }
        .gap-4 { gap: 24px; }
        .mb-1 { margin-bottom: 6px; }
        .mb-2 { margin-bottom: 12px; }
        .mb-3 { margin-bottom: 20px; }
        .mb-4 { margin-bottom: 32px; }
        .mt-2 { margin-top: 12px; }
        .mt-3 { margin-top: 20px; }
        .mt-4 { margin-top: 32px; }
        .d-flex { display: flex; }
        .align-center { align-items: center; }
        .justify-center { justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }
        .text-center { text-align: center; }
        .w-100 { width: 100%; }
        .rounded { border-radius: var(--radius); }
        .shadow { box-shadow: var(--shadow); }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0b4f6c;
            --primary-light: #1a7a9a;
            --primary-dark: #073b4f;
            --accent: #f7a325;
            --accent-light: #fabe5e;
            --bg-body: #f5f7fa;
            --bg-white: #ffffff;
            --bg-light: #eef2f5;
            --text-dark: #1a2a3a;
            --text-body: #2d3e4f;
            --text-weak: #6b7f8e;
            --text-white: #f0f4f8;
            --border-color: #dce3ea;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 6px rgba(11, 79, 108, 0.06);
            --shadow-md: 0 6px 20px rgba(11, 79, 108, 0.08);
            --shadow-lg: 0 12px 40px rgba(11, 79, 108, 0.12);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --transition: all 0.25s ease;
        }

        /* ===== 基础 reset / base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        /* ===== 容器 ===== */
        .container {
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            backdrop-filter: blur(6px);
            background-color: rgba(255, 255, 255, 0.96);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            height: 64px;
            gap: 16px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary-dark);
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .site-logo span {
            letter-spacing: -0.3px;
        }
        .site-logo:hover {
            color: var(--primary);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
        }
        .nav-list::-webkit-scrollbar {
            display: none;
        }

        .nav-link {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-body);
            white-space: nowrap;
            transition: var(--transition);
            text-decoration: none;
        }
        .nav-link i {
            font-size: 0.88rem;
            color: var(--text-weak);
            transition: var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .nav-link:hover i {
            color: var(--primary-light);
        }
        .nav-link.active {
            color: var(--primary-dark);
            background: rgba(11, 79, 108, 0.08);
            font-weight: 600;
        }
        .nav-link.active i {
            color: var(--primary);
        }
        .nav-link:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 6px 16px;
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(11, 79, 108, 0.08);
        }
        .nav-search i {
            color: var(--text-weak);
            font-size: 0.95rem;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            padding: 4px 0;
            min-width: 140px;
            font-size: 0.9rem;
            color: var(--text-dark);
        }
        .nav-search input::placeholder {
            color: var(--text-weak);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--primary);
            background: var(--bg-light);
        }
        .nav-toggle:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        /* 移动端导航折叠 */
        @media (max-width: 820px) {
            .nav-list {
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 20px 20px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                overflow-x: visible;
                max-height: 70vh;
                overflow-y: auto;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-link {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-toggle {
                display: block;
            }
            .nav-search input {
                min-width: 100px;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                padding: 0 12px;
                gap: 8px;
            }
            .site-logo {
                font-size: 1.15rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
            .nav-search {
                padding: 4px 10px;
            }
            .nav-search input {
                min-width: 70px;
                font-size: 0.82rem;
            }
            .nav-search i {
                font-size: 0.82rem;
            }
        }

        /* ===== 文章页 ===== */
        .page-article {
            padding: 48px 0 64px;
        }

        .article-header {
            margin-bottom: 40px;
        }

        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-weak);
            margin-bottom: 20px;
        }
        .article-breadcrumb a {
            color: var(--text-weak);
            text-decoration: none;
        }
        .article-breadcrumb a:hover {
            color: var(--primary);
        }
        .article-breadcrumb .sep {
            color: var(--border-color);
            font-weight: 300;
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(11, 79, 108, 0.1);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 40px;
            letter-spacing: 0.3px;
            margin-bottom: 14px;
        }

        .article-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.3;
            margin: 0 0 16px 0;
            letter-spacing: -0.4px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 16px 24px;
            font-size: 0.9rem;
            color: var(--text-weak);
        }
        .article-meta i {
            margin-right: 4px;
            color: var(--primary-light);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .article-cover {
            margin: 32px 0 40px;
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            aspect-ratio: 1200 / 675;
            background: var(--bg-light);
        }
        .article-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }
        .article-content p {
            margin: 0 0 1.4em;
        }
        .article-content h2,
        .article-content h3 {
            color: var(--text-dark);
            font-weight: 600;
            margin-top: 1.8em;
            margin-bottom: 0.8em;
        }
        .article-content h2 {
            font-size: 1.6rem;
        }
        .article-content h3 {
            font-size: 1.3rem;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 1.4em;
            padding-left: 1.6em;
        }
        .article-content li {
            margin-bottom: 0.4em;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content a:hover {
            color: var(--primary-light);
        }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.2em 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content blockquote {
            margin: 1.4em 0;
            padding: 16px 24px;
            border-left: 4px solid var(--accent);
            background: var(--bg-light);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-weak);
            font-style: normal;
        }
        .article-content code {
            background: var(--bg-light);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-content pre {
            background: #1e2a36;
            color: #e8edf3;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.92rem;
            line-height: 1.6;
            margin: 1.2em 0;
        }

        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            display: inline-block;
            background: var(--bg-light);
            color: var(--text-weak);
            font-size: 0.82rem;
            padding: 4px 14px;
            border-radius: 40px;
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(11, 79, 108, 0.08);
            color: var(--primary);
        }

        .article-nav {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            color: var(--primary);
            font-weight: 500;
        }
        .article-nav a:hover {
            color: var(--primary-light);
        }
        .article-nav .prev i {
            margin-right: 4px;
        }
        .article-nav .next i {
            margin-left: 4px;
        }

        /* ===== 未找到文章 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            max-width: 600px;
            margin: 0 auto;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--border-color);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-weak);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }
        .not-found-box .btn-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: var(--transition);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* ===== 相关文章 ===== */
        .related-section {
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid var(--border-color);
        }
        .related-section h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 24px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .related-card .card-img {
            aspect-ratio: 16 / 9;
            background: var(--bg-light);
            overflow: hidden;
        }
        .related-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .card-img img {
            transform: scale(1.05);
        }
        .related-card .card-body {
            padding: 16px 20px 20px;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 6px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-dark);
            margin: 0 0 8px;
            line-height: 1.4;
        }
        .related-card .card-body h4 a {
            color: var(--text-dark);
            text-decoration: none;
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body .card-date {
            font-size: 0.82rem;
            color: var(--text-weak);
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-white);
            padding: 56px 0 32px;
            margin-top: 48px;
        }
        .site-footer .site-logo {
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .site-footer .site-logo i {
            color: var(--accent);
        }
        .site-footer p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(240, 248, 255, 0.75);
            max-width: 360px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(240, 248, 255, 0.7);
            font-size: 0.9rem;
            transition: var(--transition);
            text-decoration: none;
        }
        .footer-col ul li a:hover {
            color: var(--accent-light);
        }
        .footer-col ul li a i {
            margin-right: 8px;
            width: 16px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.85rem;
            color: rgba(240, 248, 255, 0.6);
        }
        .footer-bottom a {
            color: rgba(240, 248, 255, 0.8);
            text-decoration: none;
        }
        .footer-bottom a:hover {
            color: var(--accent-light);
        }
        .footer-social {
            display: flex;
            gap: 18px;
        }
        .footer-social a {
            color: rgba(240, 248, 255, 0.6);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            color: var(--accent-light);
            transform: translateY(-2px);
        }

        @media (max-width: 992px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .page-article {
                padding: 24px 0 40px;
            }
            .article-title {
                font-size: 1.6rem;
            }
            .article-body {
                padding: 24px 20px;
            }
            .article-content {
                font-size: 1rem;
            }
            .article-cover {
                margin: 20px 0 28px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }

        @media (max-width: 520px) {
            .article-title {
                font-size: 1.35rem;
            }
            .article-meta {
                font-size: 0.82rem;
                gap: 8px 16px;
            }
            .article-body {
                padding: 16px 12px;
                border-radius: var(--radius-sm);
            }
            .article-breadcrumb {
                font-size: 0.8rem;
            }
            .article-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            .not-found-box {
                padding: 48px 16px;
            }
            .not-found-box i {
                font-size: 3rem;
            }
            .not-found-box h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== 通用辅助 ===== */
        .text-center {
            text-align: center;
        }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 32px; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0d6efd;
            --primary-dark: #0a58ca;
            --primary-light: #6ea8fe;
            --accent: #fd7e14;
            --accent-dark: #e96b0a;
            --bg-body: #f8faff;
            --bg-white: #ffffff;
            --bg-light: #f0f5ff;
            --bg-dark: #0b1a33;
            --text-dark: #1a2a3a;
            --text-main: #2d3e50;
            --text-light: #6c7a8a;
            --text-white: #f0f4f8;
            --border-color: #dce3ed;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(13, 110, 253, 0.06);
            --shadow-md: 0 8px 30px rgba(13, 110, 253, 0.10);
            --shadow-lg: 0 20px 50px rgba(13, 110, 253, 0.14);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            padding: 0;
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

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

        ul,
        ol {
            padding-left: 1.25rem;
        }

        /* ===== Container ===== */
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.75rem;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 640px;
            margin: 0 auto 2.5rem auto;
            line-height: 1.6;
        }

        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }

        .section-header .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            border-radius: 4px;
            margin: 12px auto 0;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
            }
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 12px rgba(13, 110, 253, 0.05);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(12px);
            background: rgba(255, 255, 255, 0.92);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
            height: 68px;
            gap: 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-dark);
            text-decoration: none;
            flex-shrink: 0;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .site-logo:hover {
            color: var(--primary-dark);
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }

        .nav-list .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-main);
            transition: all var(--transition);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-list .nav-link i {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .nav-list .nav-link:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-list .nav-link:hover i {
            color: var(--primary);
        }
        .nav-list .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 10px rgba(13, 110, 253, 0.25);
        }
        .nav-list .nav-link.active i {
            color: #fff;
        }
        .nav-list .nav-link:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 40px;
            padding: 0 12px 0 16px;
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .nav-search:focus-within {
            border-color: var(--primary);
            background: var(--bg-white);
            box-shadow: 0 0 0 4px rgba(13, 110, 253, 0.08);
        }
        .nav-search i {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-right: 6px;
        }
        .nav-search input {
            border: none;
            background: transparent;
            padding: 8px 0 8px 4px;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 180px;
            outline: none;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* Mobile nav */
        @media (max-width: 992px) {
            .nav-list {
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-bottom: 2px solid var(--border-color);
                z-index: 1040;
                max-height: calc(100vh - 68px);
                overflow-y: auto;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-list .nav-link {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-search input {
                width: 120px;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 576px) {
            .header-inner {
                padding: 0 16px;
                height: 60px;
            }
            .site-logo {
                font-size: 1.2rem;
            }
            .site-logo i {
                font-size: 1.3rem;
            }
            .nav-search input {
                width: 80px;
                font-size: 0.8rem;
            }
            .nav-search {
                padding: 0 8px 0 12px;
            }
            .nav-list {
                top: 60px;
                padding: 16px;
            }
        }

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: linear-gradient(135deg, #0b1a33 0%, #1a2d4a 50%, #0d6efd 100%);
            overflow: hidden;
            padding: 80px 24px 60px;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.20);
            padding: 4px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            color: var(--text-white);
            letter-spacing: 0.3px;
            margin-bottom: 20px;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.03em;
            line-height: 1.2;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.20);
        }
        .category-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .category-hero .hero-actions {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: 240px;
                padding: 60px 20px 48px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
        }
        @media (max-width: 576px) {
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-actions {
                flex-direction: column;
                align-items: center;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(13, 110, 253, 0.30);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(13, 110, 253, 0.35);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.70);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-outline-primary {
            background: transparent;
            border: 2px solid var(--primary);
            color: var(--primary);
        }
        .btn-outline-primary:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 4px 14px rgba(13, 110, 253, 0.20);
        }
        .btn-sm {
            padding: 6px 18px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 14px 36px;
            font-size: 1.05rem;
        }

        /* ===== Cards ===== */
        .card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .card-body {
            padding: 24px;
        }
        .card-img-top {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }

        /* ===== Badge / Tag ===== */
        .badge-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 40px;
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--primary);
            border: 1px solid rgba(13, 110, 253, 0.15);
            transition: all var(--transition);
        }
        .badge-tag:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .badge-hot {
            background: #fff0e6;
            color: var(--accent);
            border-color: rgba(253, 126, 20, 0.20);
        }
        .badge-hot:hover {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }

        /* ===== Section Spacing ===== */
        .section-block {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-block {
                padding: 56px 0;
            }
        }

        .bg-white-block {
            background: var(--bg-white);
        }
        .bg-light-block {
            background: var(--bg-light);
        }
        .bg-dark-block {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .bg-dark-block .section-title {
            color: #fff;
        }
        .bg-dark-block .section-subtitle {
            color: rgba(255, 255, 255, 0.70);
        }

        /* ===== Solution Cards Grid ===== */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .solution-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .solution-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
            transform: scaleX(0);
            transform-origin: left;
            transition: transform var(--transition);
        }
        .solution-card:hover::before {
            transform: scaleX(1);
        }
        .solution-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .solution-card .icon-box {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            border-radius: var(--radius-md);
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            transition: all var(--transition);
        }
        .solution-card:hover .icon-box {
            background: var(--primary);
            color: #fff;
        }
        .solution-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 10px;
        }
        .solution-card p {
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .solution-card .card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            justify-content: center;
        }

        @media (max-width: 992px) {
            .solution-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 576px) {
            .solution-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .solution-card {
                padding: 24px 18px 22px;
            }
        }

        /* ===== Case / Article Cards ===== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .case-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .case-card .case-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .case-card .case-body {
            padding: 20px 22px 22px;
        }
        .case-card .case-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }
        .case-card .case-body p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .case-card .case-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .case-card .case-meta i {
            margin-right: 4px;
        }

        @media (max-width: 992px) {
            .case-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 576px) {
            .case-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 28px 16px;
            border-radius: var(--radius-md);
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(4px);
            transition: all var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-3px);
        }
        .stat-item .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-number span {
            font-size: 1.4rem;
            font-weight: 400;
            opacity: 0.7;
        }
        .stat-item .stat-label {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 6px;
        }

        @media (max-width: 992px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
        }
        @media (max-width: 576px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-color);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px 0 0;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-answer.open {
            max-height: 300px;
            padding-top: 14px;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, #3d8bfd 100%);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-block p {
            font-size: 1.1rem;
            opacity: 0.90;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-block .btn {
            position: relative;
        }

        @media (max-width: 768px) {
            .cta-block {
                padding: 40px 24px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block p {
                font-size: 1rem;
            }
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-nav {
            padding: 16px 0 8px;
            font-size: 0.9rem;
            color: var(--text-light);
        }
        .breadcrumb-nav a {
            color: var(--text-light);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav span {
            color: var(--text-dark);
            font-weight: 500;
        }
        .breadcrumb-nav .sep {
            margin: 0 8px;
            color: var(--border-color);
        }

        /* ===== Footer (shared) ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .site-footer .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 14px;
        }
        .site-footer .footer-brand .site-logo i {
            color: var(--primary-light);
        }
        .site-footer .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.60);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-col ul li {
            margin-bottom: 10px;
        }
        .site-footer .footer-col ul li a {
            color: rgba(255, 255, 255, 0.60);
            font-size: 0.92rem;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-col ul li a:hover {
            color: #fff;
            transform: translateX(4px);
        }
        .site-footer .footer-col ul li a i {
            font-size: 0.85rem;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0 32px;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.50);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.60);
        }
        .footer-bottom a:hover {
            color: #fff;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.60);
            font-size: 1.1rem;
            transition: all var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        @media (max-width: 992px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 576px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 0;
            }
        }

        /* ===== Resource List ===== */
        .resource-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .resource-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 22px;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .resource-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .resource-item .ri-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary);
            flex-shrink: 0;
        }
        .resource-item .ri-content h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .resource-item .ri-content p {
            font-size: 0.88rem;
            color: var(--text-light);
            margin: 0;
            line-height: 1.5;
        }
        .resource-item .ri-content .ri-meta {
            font-size: 0.8rem;
            color: var(--text-light);
            margin-top: 6px;
        }

        @media (max-width: 768px) {
            .resource-list {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Utility ===== */
        .text-primary {
            color: var(--primary) !important;
        }
        .mt-1 { margin-top: 8px; }
        .mt-2 { margin-top: 16px; }
        .mt-3 { margin-top: 24px; }
        .mt-4 { margin-top: 32px; }
        .mb-1 { margin-bottom: 8px; }
        .mb-2 { margin-bottom: 16px; }
        .mb-3 { margin-bottom: 24px; }
        .gap-2 { gap: 12px; }
        .gap-3 { gap: 20px; }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Smooth fade-in on scroll (lightweight) ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0a4b7a;
            --primary-light: #1a6ba8;
            --primary-dark: #063052;
            --accent: #f5b042;
            --accent-light: #f8c46a;
            --accent-dark: #d9942a;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-light: #eef3f8;
            --bg-dark: #0a1e2f;
            --text-dark: #1a2a3a;
            --text-body: #2d3e4f;
            --text-muted: #6a7f94;
            --text-light: #a0b4c6;
            --border-color: #dce5ed;
            --border-light: #eaf0f5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(10, 75, 122, 0.06);
            --shadow-md: 0 8px 30px rgba(10, 75, 122, 0.1);
            --shadow-lg: 0 20px 60px rgba(10, 75, 122, 0.14);
            --shadow-accent: 0 8px 30px rgba(245, 176, 66, 0.3);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --spacing-section: 5rem;
            --spacing-block: 2.5rem;
            --transition: all 0.25s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== Typography ===== */
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-dark);
            letter-spacing: -0.02em;
        }
        .section-title {
            font-size: 2.2rem;
            margin-bottom: 0.75rem;
            position: relative;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 680px;
            margin: 0 auto 2.5rem auto;
            text-align: center;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        .section-header .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--accent);
            border-radius: 4px;
            margin: 0.75rem auto 0;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 16px rgba(10, 75, 122, 0.04);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0 1.5rem;
        }
        .header-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 1rem;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.03em;
            white-space: nowrap;
            text-decoration: none;
        }
        .site-logo i {
            font-size: 1.6rem;
            color: var(--accent);
        }
        .site-logo span {
            color: var(--primary);
        }
        .site-logo:hover {
            color: var(--primary);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 0.25rem;
            flex-wrap: wrap;
        }
        .nav-list .nav-link {
            padding: 0.5rem 1.1rem;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: var(--transition);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-list .nav-link i {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .nav-list .nav-link:hover {
            background: var(--bg-light);
            color: var(--primary);
        }
        .nav-list .nav-link:hover i {
            color: var(--primary-light);
        }
        .nav-list .nav-link.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(10, 75, 122, 0.2);
        }
        .nav-list .nav-link.active i {
            color: #fff;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: var(--bg-light);
            border-radius: 50px;
            padding: 0.35rem 0.5rem 0.35rem 1rem;
            border: 1px solid var(--border-light);
            transition: var(--transition);
            max-width: 220px;
        }
        .nav-search:focus-within {
            border-color: var(--primary-light);
            background: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(10, 75, 122, 0.08);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-right: 0.4rem;
        }
        .nav-search input {
            border: none;
            background: transparent;
            outline: none;
            font-size: 0.9rem;
            color: var(--text-dark);
            width: 120px;
            padding: 0.2rem 0;
        }
        .nav-search input::placeholder {
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.4rem;
            color: var(--primary);
            cursor: pointer;
            padding: 0.25rem 0.5rem;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            background: var(--bg-light);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            padding: 5rem 0 4rem;
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 2.8rem;
            color: #fff;
            font-weight: 800;
            margin-bottom: 1rem;
            letter-spacing: -0.03em;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .category-hero p {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 700px;
            margin: 0 auto 1.5rem;
            line-height: 1.7;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            color: #fff;
            padding: 0.4rem 1.4rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            letter-spacing: 0.3px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            margin-bottom: 1.5rem;
        }
        .category-hero .hero-stats {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
            color: #fff;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.2;
            display: block;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.85rem;
            opacity: 0.8;
        }
        .hero-wave {
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 60px;
            fill: var(--bg-body);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-bar {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border-light);
            padding: 0.8rem 0;
            font-size: 0.9rem;
        }
        .breadcrumb-bar .breadcrumb {
            background: transparent;
            padding: 0;
            margin: 0;
        }
        .breadcrumb-bar .breadcrumb-item a {
            color: var(--text-muted);
        }
        .breadcrumb-bar .breadcrumb-item.active {
            color: var(--primary);
            font-weight: 500;
        }

        /* ===== Guide List Section ===== */
        .guide-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-white);
        }
        .guide-section.bg-light-section {
            background: var(--bg-light);
        }
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 1.8rem;
        }
        .guide-card {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 2rem 1.8rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            position: relative;
            overflow: hidden;
        }
        .guide-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-light);
        }
        .guide-card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary);
            margin-bottom: 1.2rem;
            transition: var(--transition);
        }
        .guide-card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .guide-card h3 {
            font-size: 1.25rem;
            margin-bottom: 0.6rem;
        }
        .guide-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 1rem;
            line-height: 1.6;
        }
        .guide-card .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin-bottom: 1rem;
        }
        .guide-card .card-tags .badge {
            font-weight: 500;
            font-size: 0.75rem;
            padding: 0.25rem 0.7rem;
            border-radius: 50px;
            background: var(--bg-light);
            color: var(--text-muted);
            border: 1px solid var(--border-light);
        }
        .guide-card .card-link {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            transition: var(--transition);
        }
        .guide-card .card-link i {
            font-size: 0.8rem;
            transition: var(--transition);
        }
        .guide-card .card-link:hover {
            color: var(--primary-dark);
            gap: 0.7rem;
        }
        .guide-card .card-number {
            position: absolute;
            top: 1rem;
            right: 1.2rem;
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--border-light);
            line-height: 1;
            pointer-events: none;
            transition: var(--transition);
        }
        .guide-card:hover .card-number {
            color: rgba(10, 75, 122, 0.06);
        }

        /* ===== Featured Article ===== */
        .featured-article {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            display: flex;
            flex-wrap: wrap;
        }
        .featured-article:hover {
            box-shadow: var(--shadow-lg);
        }
        .featured-article .article-image {
            flex: 1 1 45%;
            min-height: 280px;
            background: var(--bg-light);
            position: relative;
            overflow: hidden;
        }
        .featured-article .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
            transition: var(--transition);
        }
        .featured-article:hover .article-image img {
            transform: scale(1.03);
        }
        .featured-article .article-content {
            flex: 1 1 55%;
            padding: 2.5rem 2.8rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-article .article-content .badge {
            align-self: flex-start;
            font-weight: 600;
            font-size: 0.75rem;
            padding: 0.3rem 1rem;
            border-radius: 50px;
            background: var(--accent);
            color: var(--primary-dark);
            margin-bottom: 1rem;
            border: none;
        }
        .featured-article .article-content h2 {
            font-size: 1.8rem;
            margin-bottom: 0.8rem;
        }
        .featured-article .article-content p {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 1.2rem;
        }
        .featured-article .article-content .meta {
            display: flex;
            gap: 1.5rem;
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 1.2rem;
        }
        .featured-article .article-content .meta i {
            margin-right: 0.3rem;
        }

        /* ===== Steps / Process ===== */
        .steps-section {
            background: var(--bg-light);
            padding: var(--spacing-section) 0;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1.8rem;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            padding: 2rem 1.2rem;
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-item .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1rem;
            box-shadow: 0 4px 14px rgba(10, 75, 122, 0.2);
        }
        .step-item h4 {
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
        }
        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .step-connector {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-section) 0;
            background: var(--bg-white);
        }
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-light);
            padding: 1.2rem 0;
        }
        .faq-item:first-child {
            border-top: 1px solid var(--border-light);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-dark);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0.2rem 0;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 1rem;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 0.5rem 0 0;
        }
        .faq-answer.show {
            max-height: 300px;
            padding: 0.8rem 0.5rem 0.2rem 0;
        }
        .faq-answer p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 4.5rem 0;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            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;
            pointer-events: none;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            color: #fff;
            margin-bottom: 0.8rem;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 1.8rem;
        }
        .cta-section .btn-cta {
            background: var(--accent);
            color: var(--primary-dark);
            border: none;
            padding: 0.9rem 2.8rem;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            box-shadow: var(--shadow-accent);
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 12px 40px rgba(245, 176, 66, 0.4);
            color: var(--primary-dark);
        }
        .cta-section .btn-cta i {
            font-size: 0.9rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 4rem 0 0;
        }
        .site-footer .container {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
            display: inline-flex;
        }
        .footer-brand .site-logo span {
            color: #fff;
        }
        .footer-brand .site-logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 1rem;
            color: #fff;
            margin-bottom: 1rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-col ul li {
            margin-bottom: 0.5rem;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-col ul li a i {
            font-size: 0.85rem;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 0;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        .footer-social {
            display: flex;
            gap: 0.8rem;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.45);
            font-size: 1rem;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .category-hero h1 {
                font-size: 2.3rem;
            }
            .featured-article .article-content {
                padding: 2rem 1.8rem;
            }
            .featured-article .article-content h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 3rem;
            }
            .header-inner {
                height: 60px;
            }
            .nav-list {
                display: none;
                position: absolute;
                top: 60px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
                border-bottom: 1px solid var(--border-light);
                z-index: 1040;
                gap: 0.15rem;
            }
            .nav-list.open {
                display: flex;
            }
            .nav-list .nav-link {
                padding: 0.6rem 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-search {
                max-width: 160px;
            }
            .nav-search input {
                width: 80px;
            }
            .nav-toggle {
                display: block;
            }
            .category-hero {
                padding: 3.5rem 0 3rem;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .category-hero .hero-stats {
                gap: 1.5rem;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.5rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .featured-article .article-image {
                flex: 1 1 100%;
                min-height: 200px;
            }
            .featured-article .article-content {
                flex: 1 1 100%;
                padding: 1.5rem;
            }
            .featured-article .article-content h2 {
                font-size: 1.3rem;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-stats {
                flex-direction: column;
                gap: 0.8rem;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .nav-search {
                max-width: 120px;
            }
            .nav-search input {
                width: 60px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .cta-section .btn-cta {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent);
        }
        .bg-accent-soft {
            background: rgba(245, 176, 66, 0.08);
        }
        .mb-0 {
            margin-bottom: 0;
        }
        .mt-1 {
            margin-top: 0.5rem;
        }
        .mt-2 {
            margin-top: 1rem;
        }
        .mt-3 {
            margin-top: 1.5rem;
        }
        .gap-1 {
            gap: 0.5rem;
        }
        .gap-2 {
            gap: 1rem;
        }
        .fw-600 {
            font-weight: 600;
        }
        .text-center {
            text-align: center;
        }
        .rounded-pill {
            border-radius: 50px;
        }