/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #8b5cf6;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 1px 2px rgba(15,23,42,0.04);
            --shadow-md: 0 4px 16px rgba(15,23,42,0.08), 0 2px 8px rgba(15,23,42,0.04);
            --shadow-lg: 0 12px 40px rgba(15,23,42,0.12), 0 4px 16px rgba(15,23,42,0.06);
            --shadow-xl: 0 24px 60px rgba(15,23,42,0.16);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container: 1200px;
            --header-h: 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-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -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(--primary); outline-offset: 2px; border-radius: var(--radius-sm); }
        button { font-family: inherit; cursor: pointer; border: none; background: none; }
        input { font-family: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: clamp(2rem, 5vw, 3.2rem); letter-spacing: -0.02em; }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); letter-spacing: -0.01em; }
        h3 { font-size: clamp(1.2rem, 2.5vw, 1.5rem); }
        p { margin-bottom: 0.5rem; color: var(--text-secondary); }

        /* ===== 容器 ===== */
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 860px; margin: 0 auto; padding: 0 24px; }

        /* ===== 通用间距 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-sm { padding: 48px 0; }
        .text-center { text-align: center; }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: var(--radius-md);
            font-weight: 600; font-size: 1rem; line-height: 1.4;
            transition: all var(--transition); border: 2px solid transparent;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary); color: #fff; border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-primary:active { transform: translateY(0); box-shadow: var(--shadow-sm); }
        .btn-secondary {
            background: transparent; color: var(--primary); border-color: var(--primary);
        }
        .btn-secondary:hover { background: var(--primary-light); color: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-2px); }
        .btn-accent {
            background: var(--secondary); color: #fff; border-color: var(--secondary);
        }
        .btn-accent:hover { background: #d97706; border-color: #d97706; color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: var(--radius-lg); }
        .btn-sm { padding: 8px 18px; font-size: 0.875rem; border-radius: var(--radius-sm); }
        .btn i { font-size: 1.1em; }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 100px;
            font-size: 0.8rem; font-weight: 600; line-height: 1.4;
            background: var(--primary-light); color: var(--primary);
        }
        .badge-warm { background: var(--secondary-light); color: #b45309; }
        .badge-new { background: #fce7f3; color: #be185d; }
        .badge-hot { background: #fee2e2; color: #b91c1c; }

        /* ===== 标签组 ===== */
        .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
        .tag {
            display: inline-block; padding: 6px 16px; border-radius: 100px;
            font-size: 0.85rem; font-weight: 500; background: var(--bg-alt); color: var(--text-secondary);
            border: 1px solid var(--border); transition: all var(--transition);
        }
        .tag:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border); overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-body { padding: 20px 24px 24px; }
        .card-title { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; color: var(--text); }
        .card-text { font-size: 0.95rem; color: var(--text-secondary); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .card-meta { display: flex; align-items: center; gap: 16px; font-size: 0.85rem; color: var(--text-weak); }
        .card-meta i { margin-right: 4px; }

        /* ===== 网格 ===== */
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

        /* ===== 导航 ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-h); background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border); transition: all var(--transition);
        }
        .header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
        .logo { font-size: 1.4rem; font-weight: 800; color: var(--text); letter-spacing: -0.03em; display: flex; align-items: center; gap: 10px; }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo:hover { color: var(--primary); }
        .nav { display: flex; align-items: center; gap: 6px; }
        .nav a {
            padding: 8px 18px; border-radius: var(--radius-sm);
            font-size: 0.95rem; font-weight: 500; color: var(--text-secondary);
            transition: all var(--transition); position: relative;
        }
        .nav a:hover { color: var(--primary); background: var(--primary-light); }
        .nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 600; }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn { padding: 10px 22px; font-size: 0.9rem; }
        .nav-toggle { display: none; font-size: 1.6rem; color: var(--text); padding: 8px; cursor: pointer; }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 80px; position: relative; overflow: hidden;
            background: linear-gradient(160deg, #1e293b 0%, #0f172a 60%, #1e3a5f 100%);
            min-height: 600px; display: flex; align-items: center;
        }
        .hero-bg {
            position: absolute; inset: 0; z-index: 0; opacity: 0.25;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        }
        .hero .container { position: relative; z-index: 2; }
        .hero-content { max-width: 720px; }
        .hero-badge { display: inline-flex; align-items: center; gap: 8px; padding: 6px 18px; border-radius: 100px; background: rgba(255,255,255,0.12); color: #fff; font-size: 0.9rem; font-weight: 500; margin-bottom: 24px; backdrop-filter: blur(4px); }
        .hero h1 { color: #fff; margin-bottom: 20px; }
        .hero p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 600px; margin-bottom: 32px; }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; }
        .hero-actions .btn { border-radius: var(--radius-lg); }
        .hero-stats { display: flex; gap: 40px; margin-top: 48px; padding-top: 32px; border-top: 1px solid rgba(255,255,255,0.1); }
        .hero-stat { text-align: left; }
        .hero-stat-num { font-size: 2rem; font-weight: 800; color: #fff; }
        .hero-stat-label { font-size: 0.9rem; color: rgba(255,255,255,0.55); margin-top: 2px; }

        /* ===== 板块标题 ===== */
        .section-header { margin-bottom: 48px; }
        .section-header h2 { margin-bottom: 12px; }
        .section-header p { font-size: 1.1rem; max-width: 600px; color: var(--text-secondary); }
        .section-header.text-center p { margin: 0 auto; }

        /* ===== 分类入口 Tab 风格 ===== */
        .category-tabs { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 48px; }
        .category-tab {
            padding: 10px 24px; border-radius: 100px; font-weight: 600; font-size: 0.95rem;
            background: var(--bg-alt); color: var(--text-secondary); border: 1px solid var(--border);
            transition: all var(--transition); cursor: pointer;
        }
        .category-tab:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary); }
        .category-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: var(--shadow-sm); }
        .category-tab i { margin-right: 6px; }

        /* ===== 分类卡片 ===== */
        .cat-card {
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border); padding: 28px 24px;
            transition: all var(--transition); text-align: center;
        }
        .cat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); border-color: var(--primary); }
        .cat-card-icon { width: 56px; height: 56px; border-radius: var(--radius-md); background: var(--primary-light); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-size: 1.6rem; color: var(--primary); }
        .cat-card h3 { font-size: 1.1rem; margin-bottom: 6px; }
        .cat-card p { font-size: 0.9rem; color: var(--text-secondary); }

        /* ===== 资讯列表 ===== */
        .post-list { display: grid; gap: 20px; }
        .post-item {
            display: flex; gap: 20px; padding: 20px 24px; background: var(--bg-card);
            border-radius: var(--radius-md); border: 1px solid var(--border);
            transition: all var(--transition); align-items: flex-start;
        }
        .post-item:hover { box-shadow: var(--shadow-sm); border-color: var(--primary); }
        .post-item-thumb { width: 120px; min-height: 80px; border-radius: var(--radius-sm); object-fit: cover; flex-shrink: 0; }
        .post-item-body { flex: 1; min-width: 0; }
        .post-item-title { font-size: 1.05rem; font-weight: 700; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-item-title a { color: var(--text); }
        .post-item-title a:hover { color: var(--primary); }
        .post-item-excerpt { font-size: 0.9rem; color: var(--text-secondary); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
        .post-item-meta { display: flex; align-items: center; gap: 16px; font-size: 0.82rem; color: var(--text-weak); }
        .post-item-meta .badge { font-size: 0.75rem; padding: 2px 10px; }
        .post-item-meta i { margin-right: 4px; }

        /* ===== 图文区块 ===== */
        .feature-block {
            display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
        }
        .feature-block.reverse { direction: rtl; }
        .feature-block.reverse > * { direction: ltr; }
        .feature-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
        .feature-img img { width: 100%; height: auto; display: block; }
        .feature-content h2 { margin-bottom: 16px; }
        .feature-content p { margin-bottom: 16px; font-size: 1.05rem; }
        .feature-list { margin-top: 24px; display: grid; gap: 16px; }
        .feature-list-item { display: flex; gap: 14px; align-items: flex-start; }
        .feature-list-item i { color: var(--primary); font-size: 1.2rem; margin-top: 2px; flex-shrink: 0; }
        .feature-list-item strong { display: block; font-size: 1rem; margin-bottom: 2px; }
        .feature-list-item span { font-size: 0.9rem; color: var(--text-secondary); }

        /* ===== 数据 / 流程 ===== */
        .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-item {
            text-align: center; padding: 32px 20px; background: var(--bg-card);
            border-radius: var(--radius-md); border: 1px solid var(--border);
            position: relative; transition: all var(--transition);
        }
        .step-item:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .step-item::before {
            counter-increment: step; content: "0" counter(step);
            display: block; font-size: 2.8rem; font-weight: 800; color: var(--primary-light);
            line-height: 1; margin-bottom: 12px;
        }
        .step-item h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-item p { font-size: 0.9rem; color: var(--text-secondary); }
        .step-arrow { display: none; }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .stat-card {
            text-align: center; padding: 36px 20px; background: var(--bg-card);
            border-radius: var(--radius-md); border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .stat-card:hover { box-shadow: var(--shadow-md); }
        .stat-card-num { font-size: 2.6rem; font-weight: 800; color: var(--primary); line-height: 1.2; }
        .stat-card-label { font-size: 0.95rem; color: var(--text-secondary); margin-top: 8px; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
        .faq-item {
            background: var(--bg-card); border: 1px solid var(--border);
            border-radius: var(--radius-md); overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); }
        .faq-question {
            padding: 20px 24px; font-weight: 600; font-size: 1.05rem;
            display: flex; align-items: center; justify-content: space-between; gap: 16px;
            cursor: pointer; color: var(--text); background: none; width: 100%; text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question i { color: var(--primary); transition: transform var(--transition); font-size: 1.1rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px; font-size: 0.95rem; color: var(--text-secondary);
            line-height: 1.7; display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, #1e293b 0%, #0f172a 60%, #1e3a5f 100%);
            padding: 80px 0; text-align: center; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0; z-index: 0; opacity: 0.15;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { color: #fff; font-size: clamp(1.8rem, 4vw, 2.6rem); margin-bottom: 16px; }
        .cta-section p { color: rgba(255,255,255,0.7); font-size: 1.1rem; max-width: 600px; margin: 0 auto 32px; }
        .cta-section .btn { border-radius: var(--radius-lg); }

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a; padding: 56px 0 32px; color: rgba(255,255,255,0.7);
        }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo i { color: var(--primary); }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.55); max-width: 360px; line-height: 1.7; }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
        .footer-links { display: grid; gap: 10px; }
        .footer-links a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: color var(--transition); }
        .footer-links a:hover { color: #fff; }
        .footer-bottom {
            padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08);
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px;
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 40px; height: 40px; 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); font-size: 1.1rem;
        }
        .footer-socials a:hover { background: var(--primary); color: #fff; }

        /* ===== 空状态 ===== */
        .empty-state { text-align: center; padding: 48px 24px; color: var(--text-weak); }
        .empty-state i { font-size: 3rem; margin-bottom: 16px; display: block; color: var(--border); }
        .empty-state p { font-size: 1rem; }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .steps { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .header .container { padding: 0 16px; }
            .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); flex-direction: column; padding: 16px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg); gap: 4px; }
            .nav.open { display: flex; }
            .nav a { padding: 12px 16px; width: 100%; font-size: 1rem; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
            .hero { padding: 120px 0 60px; min-height: auto; }
            .hero-stats { gap: 24px; flex-wrap: wrap; }
            .hero-stat { flex: 1; min-width: 80px; }
            .hero-stat-num { font-size: 1.5rem; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; gap: 20px; }
            .feature-block { grid-template-columns: 1fr; gap: 32px; }
            .feature-block.reverse { direction: ltr; }
            .steps { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .post-item { flex-direction: column; }
            .post-item-thumb { width: 100%; height: 160px; }
            .footer-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 56px 0; }
            .section-header { margin-bottom: 32px; }
            .category-tabs { gap: 8px; }
            .category-tab { padding: 8px 18px; font-size: 0.85rem; }
        }

        @media (max-width: 520px) {
            .hero { padding: 100px 0 48px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .steps { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 16px; }
            .stat-card-num { font-size: 2rem; }
            .container { padding: 0 16px; }
            .post-item-thumb { height: 140px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .faq-answer { padding: 0 18px 16px; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
        }

        /* ===== 辅助 ===== */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .gap-16 { gap: 16px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-48 { margin-top: 48px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --secondary-dark: #e84393;
            --accent: #00cec9;
            --bg: #0f0e17;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222244;
            --bg-section: #16213e;
            --bg-section-alt: #0f0e17;
            --text: #f0f0f5;
            --text-secondary: #b0b0c0;
            --text-muted: #6c6c80;
            --border: #2d2d4a;
            --border-light: #3d3d5a;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(108, 92, 231, 0.15);
            --shadow-hover: 0 12px 48px rgba(108, 92, 231, 0.3);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            padding-top: var(--header-height);
        }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--secondary); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

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

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 14, 23, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--text) !important;
            letter-spacing: -0.5px;
            transition: var(--transition);
        }
        .logo i { color: var(--primary-light); font-size: 1.5rem; }
        .logo:hover { color: var(--primary-light) !important; transform: scale(1.02); }
        .nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
            white-space: nowrap;
        }
        .nav a i { font-size: 0.85rem; }
        .nav a:hover, .nav a.active {
            color: var(--text);
            background: rgba(108, 92, 231, 0.15);
        }
        .nav a.active {
            color: var(--primary-light);
            background: rgba(108, 92, 231, 0.2);
        }
        .nav .nav-cta { margin-left: 12px; }
        .nav .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .nav-toggle {
            display: none;
            background: none;
            color: var(--text);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover { background: rgba(255,255,255,0.05); }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff !important;
            box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(108, 92, 231, 0.45);
            color: #fff !important;
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--primary-light) !important;
            border: 2px solid var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff !important;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; border-radius: var(--radius); }

        /* ===== Article Page ===== */
        .article-hero {
            position: relative;
            padding: 60px 0 40px;
            background: linear-gradient(135deg, rgba(108,92,231,0.08), rgba(253,121,168,0.05));
            border-bottom: 1px solid var(--border);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary-light); }
        .article-breadcrumb .sep { color: var(--border-light); }
        .article-category-badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(108,92,231,0.2);
            color: var(--primary-light);
            margin-bottom: 16px;
            border: 1px solid rgba(108,92,231,0.25);
        }
        .article-hero h1 {
            font-size: 2.6rem;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #fff 40%, var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 4px; color: var(--primary-light); }
        .article-meta .meta-divider { width: 4px; height: 4px; border-radius: 50%; background: var(--border-light); }

        /* ===== Article Body ===== */
        .article-section {
            padding: 50px 0 80px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-secondary);
        }
        .article-body .content p { margin-bottom: 1.2em; }
        .article-body .content h2, .article-body .content h3 { margin-top: 1.6em; margin-bottom: 0.6em; color: var(--text); }
        .article-body .content ul, .article-body .content ol {
            margin-bottom: 1.2em;
            padding-left: 1.6em;
        }
        .article-body .content li { margin-bottom: 0.4em; list-style: disc; }
        .article-body .content ol li { list-style: decimal; }
        .article-body .content a { color: var(--primary-light); text-decoration: underline; }
        .article-body .content a:hover { color: var(--secondary); }
        .article-body .content img { border-radius: var(--radius-sm); margin: 1.5em 0; }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            padding: 12px 20px;
            margin: 1.2em 0;
            background: rgba(108,92,231,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
        }
        .article-body .content code {
            background: rgba(255,255,255,0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--secondary);
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(108,92,231,0.1);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: rgba(108,92,231,0.2);
            color: var(--primary-light);
            border-color: var(--primary);
        }
        .article-nav-links {
            display: flex;
            justify-content: space-between;
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
            gap: 16px;
            flex-wrap: wrap;
        }
        .article-nav-links a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border);
            transition: var(--transition);
            max-width: 45%;
        }
        .article-nav-links a:hover {
            color: var(--primary-light);
            border-color: var(--primary);
            background: rgba(108,92,231,0.08);
        }
        .article-nav-links a i { font-size: 0.8rem; }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-card h3 i { color: var(--primary-light); }
        .sidebar-list { display: flex; flex-direction: column; gap: 12px; }
        .sidebar-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px;
            border-radius: var(--radius-sm);
            background: rgba(255,255,255,0.02);
            border: 1px solid transparent;
            transition: var(--transition);
        }
        .sidebar-list a:hover {
            background: rgba(108,92,231,0.06);
            border-color: var(--border);
            transform: translateX(4px);
        }
        .sidebar-list a .thumb {
            width: 64px;
            height: 48px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
            background: var(--bg-section);
        }
        .sidebar-list a .info { flex: 1; min-width: 0; }
        .sidebar-list a .info .title {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-list a .info .date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        .sidebar-cta {
            padding: 28px;
            background: linear-gradient(135deg, rgba(108,92,231,0.12), rgba(253,121,168,0.08));
            border: 1px solid rgba(108,92,231,0.2);
        }
        .sidebar-cta h3 { color: var(--primary-light); }
        .sidebar-cta p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 16px; line-height: 1.6; }
        .sidebar-cta .btn { width: 100%; justify-content: center; }

        /* ===== Not Found ===== */
        .not-found-section {
            min-height: 60vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 80px 24px;
        }
        .not-found-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 60px 48px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            max-width: 560px;
            width: 100%;
        }
        .not-found-card .icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .not-found-card h2 { margin-bottom: 12px; }
        .not-found-card p { color: var(--text-secondary); margin-bottom: 28px; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 60px 0 30px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.2rem; margin-bottom: 14px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-links { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-links a:hover { color: var(--primary-light); transform: translateX(4px); }
        .footer-links a i { font-size: 0.9rem; width: 20px; text-align: center; color: var(--primary-light); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 28px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 0.82rem;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-socials { display: flex; gap: 12px; }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            transition: var(--transition);
            font-size: 1rem;
        }
        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        /* ===== Empty State ===== */
        .empty-state {
            text-align: center;
            padding: 40px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }
        .empty-state i { font-size: 3rem; color: var(--text-muted); margin-bottom: 16px; }
        .empty-state p { color: var(--text-secondary); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            .nav { display: none; }
            .nav.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(15,14,23,0.98);
                backdrop-filter: blur(20px);
                padding: 20px 24px;
                border-bottom: 1px solid var(--border);
                gap: 4px;
                animation: navSlide 0.3s ease;
            }
            .nav.open a { padding: 12px 16px; width: 100%; }
            .nav.open .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav.open .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: block; }
            @keyframes navSlide {
                from { opacity: 0; transform: translateY(-10px); }
                to { opacity: 1; transform: translateY(0); }
            }
            .article-hero h1 { font-size: 1.8rem; }
            .article-body { padding: 24px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            h3 { font-size: 1.2rem; }
            .not-found-card { padding: 40px 24px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-hero { padding: 40px 0 28px; }
            .article-hero h1 { font-size: 1.5rem; }
            .article-body { padding: 16px; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-nav-links { flex-direction: column; }
            .article-nav-links a { max-width: 100%; }
            .header .logo { font-size: 1.1rem; }
            .header .logo i { font-size: 1.2rem; }
        }

/* roulang page: category1 */
/* ===== :root 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-light: #3b82f6;
            --primary-dark: #1d4ed8;
            --primary-bg: #eff6ff;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #8b5cf6;
            --success: #10b981;
            --text-dark: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --bg-body: #ffffff;
            --bg-section: #f8fafc;
            --bg-section-alt: #f1f5f9;
            --bg-card: #ffffff;
            --border-color: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.10);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.12);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.25s ease;
        }

        /* ===== 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(--text-main);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
            padding: 0;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text-dark);
            font-weight: 700;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header / Nav ===== */
        .header {
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: var(--shadow-sm);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.3px;
            flex-shrink: 0;
        }

        .logo i {
            font-size: 1.5rem;
            color: var(--primary);
        }

        .logo:hover i {
            transform: scale(1.1) rotate(-5deg);
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav a {
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: background var(--transition), color var(--transition);
        }

        .nav a i {
            font-size: 0.95rem;
        }

        .nav a:hover {
            background: var(--primary-bg);
            color: var(--primary-dark);
        }

        .nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.30);
        }

        .nav a.active:hover {
            background: var(--primary-dark);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .nav-cta .btn {
            padding: 8px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .nav-cta .btn:hover {
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            background: var(--bg-section);
            transition: background var(--transition);
        }

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

        @media (max-width: 1024px) {
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                width: 100%;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                gap: 4px;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.35s ease, opacity 0.35s ease, visibility 0.35s;
                max-height: calc(100vh - 80px);
                overflow-y: auto;
            }

            .nav.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }

            .nav a {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }

            .nav-cta {
                margin-left: 0;
                width: 100%;
                margin-top: 8px;
            }

            .nav-cta .btn {
                width: 100%;
                text-align: center;
                padding: 12px 20px;
                font-size: 1rem;
            }

            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.1rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .nav {
                padding: 12px 16px 20px;
            }
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            border: 2px solid transparent;
            transition: all var(--transition);
            cursor: pointer;
            text-align: center;
            line-height: 1.4;
        }

        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.30);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(37, 99, 235, 0.25);
        }

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

        .btn-secondary:hover {
            background: #d97706;
            border-color: #d97706;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.30);
        }

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

        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.20);
        }

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

        .btn-light:hover {
            background: var(--bg-section);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
            border-radius: var(--radius-md);
        }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            background: var(--primary-bg);
            color: var(--primary);
            letter-spacing: 0.3px;
        }

        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
        }

        .badge-new {
            background: #ecfdf5;
            color: #059669;
        }

        .badge-secondary {
            background: #fefce8;
            color: #ca8a04;
        }

        /* ===== Section ===== */
        .section {
            padding: 80px 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section-header .badge {
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .section {
                padding: 40px 0;
            }
            .section-header h2 {
                font-size: 1.35rem;
            }
        }

        /* ===== Banner / Hero ===== */
        .banner {
            position: relative;
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            min-height: 280px;
            display: flex;
            align-items: center;
            overflow: hidden;
            padding: 60px 0;
        }

        .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.30;
            z-index: 0;
        }

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

        .banner-content {
            max-width: 720px;
        }

        .banner-content .badge {
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            backdrop-filter: blur(4px);
            margin-bottom: 16px;
        }

        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.8px;
            line-height: 1.2;
            margin-bottom: 16px;
        }

        .banner-content p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 24px;
        }

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

        @media (max-width: 768px) {
            .banner {
                min-height: 220px;
                padding: 48px 0;
            }
            .banner-content h1 {
                font-size: 1.8rem;
            }
            .banner-content p {
                font-size: 0.95rem;
            }
            .banner-actions .btn {
                font-size: 0.9rem;
                padding: 10px 20px;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.5rem;
            }
            .banner-actions {
                flex-direction: column;
            }
            .banner-actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Card ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .card-body {
            padding: 20px 24px 24px;
        }

        .card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .card-body p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .card-body .badge {
            margin-bottom: 10px;
        }

        .card-footer {
            padding: 12px 24px 16px;
            border-top: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* ===== Grid ===== */
        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        @media (max-width: 1024px) {
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* ===== Steps / Timeline ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            counter-reset: step-counter;
        }

        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
        }

        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .step-item:hover .step-number {
            background: var(--primary);
            color: #fff;
            transform: scale(1.1);
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }

        .stat-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-number {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-number {
                font-size: 1.5rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

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

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: var(--bg-section);
        }

        .faq-question i {
            font-size: 1.2rem;
            color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.10;
            z-index: 0;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            letter-spacing: -0.5px;
        }

        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .cta-section .btn-light {
            font-size: 1.05rem;
            padding: 14px 36px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 56px 0;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 0;
        }

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

        .footer .logo i {
            color: var(--primary-light);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }

        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition), padding-left var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-socials {
            display: flex;
            gap: 12px;
        }

        .footer-socials a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 1.1rem;
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }

        .footer-socials a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .footer {
                padding: 40px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 特色板块样式 ===== */
        .section-alt {
            background: var(--bg-section);
        }

        /* 指南特色卡片 */
        .guide-card {
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .guide-card .card-body {
            flex: 1;
        }

        .guide-card .card-img {
            aspect-ratio: 16/10;
        }

        .guide-tag {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 12px;
        }

        /* 图文混排 */
        .media-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .media-block.reverse {
            direction: rtl;
        }

        .media-block.reverse>* {
            direction: ltr;
        }

        .media-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .media-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }

        .media-image:hover img {
            transform: scale(1.03);
        }

        .media-text h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .media-text p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .media-text .badge {
            margin-bottom: 12px;
        }

        @media (max-width: 768px) {
            .media-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .media-block.reverse {
                direction: ltr;
            }
            .media-text h3 {
                font-size: 1.3rem;
            }
            .media-text p {
                font-size: 0.92rem;
            }
        }

        /* 功能入口 chip */
        .chip-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 8px;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 30px;
            font-size: 0.92rem;
            font-weight: 600;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-main);
            transition: all var(--transition);
            cursor: default;
        }

        .chip i {
            color: var(--primary);
            font-size: 1rem;
            transition: transform var(--transition);
        }

        .chip:hover {
            background: var(--primary-bg);
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-sm);
        }

        .chip:hover i {
            transform: scale(1.2);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-light);
            padding: 16px 0 8px;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb span {
            color: var(--text-dark);
            font-weight: 500;
        }

        .breadcrumb i {
            font-size: 0.7rem;
            color: var(--text-light);
        }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 1024px) {
            .banner-content h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .banner {
                padding: 40px 0;
                min-height: 180px;
            }
            .banner-content h1 {
                font-size: 1.6rem;
            }
            .banner-content p {
                font-size: 0.92rem;
            }
            .breadcrumb {
                font-size: 0.8rem;
            }
            .chip {
                padding: 8px 16px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.3rem;
            }
            .banner-content .badge {
                font-size: 0.7rem;
                padding: 3px 10px;
            }
            .chip-grid {
                gap: 8px;
            }
            .chip {
                padding: 6px 14px;
                font-size: 0.78rem;
            }
            .chip i {
                font-size: 0.85rem;
            }
        }

        /* ===== 回到顶部 ===== */
        .back-top {
            position: fixed;
            bottom: 32px;
            right: 32px;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            opacity: 0;
            visibility: hidden;
            transform: translateY(20px);
            transition: all var(--transition);
            z-index: 900;
        }

        .back-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-top:hover {
            background: var(--primary-dark);
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        @media (max-width: 520px) {
            .back-top {
                bottom: 20px;
                right: 20px;
                width: 42px;
                height: 42px;
                font-size: 1.1rem;
            }
        }