/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2D1B69;
            --primary-light: #4A2D8A;
            --primary-dark: #1D0F47;
            --secondary: #C4953C;
            --secondary-light: #E0B860;
            --secondary-dark: #A0782E;
            --bg: #F9F7FC;
            --bg-alt: #F0ECF6;
            --bg-card: #FFFFFF;
            --text: #1E1B2E;
            --text-strong: #12101A;
            --text-weak: #7A7396;
            --text-light: #A49DB8;
            --border: #DDD6E8;
            --border-light: #EDE8F4;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(45,27,105,0.06);
            --shadow-md: 0 6px 28px rgba(45,27,105,0.10);
            --shadow-lg: 0 12px 48px rgba(45,27,105,0.14);
            --shadow-glow: 0 0 30px rgba(196,149,60,0.20);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 80px;
        }

        /* ===== 基础 Reset ===== */
        *, *::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);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--secondary); }
        a:focus-visible { outline: 2px solid var(--secondary); outline-offset: 2px; border-radius: 4px; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--text-strong); line-height: 1.3; font-weight: 700; }
        h1 { font-size: clamp(2.2rem, 5.5vw, 3.8rem); letter-spacing: -0.02em; }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); letter-spacing: -0.01em; }
        h3 { font-size: clamp(1.2rem, 2.2vw, 1.6rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1em; color: var(--text); }
        p:last-child { margin-bottom: 0; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container { padding: 0 16px; }
        }
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-subtitle { text-align: center; color: var(--text-weak); font-size: 1.1rem; max-width: 680px; margin: 0 auto 48px; }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--border-light);
            color: var(--primary);
            transition: background var(--transition), color var(--transition);
        }
        .badge-gold { background: rgba(196,149,60,0.15); color: var(--secondary-dark); }
        .badge-primary { background: rgba(45,27,105,0.10); color: var(--primary); }
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 32px; border-radius: 100px;
            font-weight: 600; font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--primary); color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-secondary {
            background: var(--secondary); color: #fff;
            border-color: var(--secondary);
        }
        .btn-secondary:hover { background: var(--secondary-light); border-color: var(--secondary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-glow); }
        .btn-outline {
            background: transparent; color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-white {
            background: #fff; color: var(--primary);
            border-color: #fff;
        }
        .btn-white:hover { background: var(--bg-alt); border-color: var(--bg-alt); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 40px; font-size: 1.05rem; }

        /* ===== 卡片组件 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .card-img { border-radius: var(--radius-sm) var(--radius-sm) 0 0; width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .card-body { padding: 20px 0 0; }
        .card-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 10px; }
        .card-title { font-size: 1.15rem; margin-bottom: 8px; font-weight: 700; }
        .card-title a { color: var(--text-strong); }
        .card-title a:hover { color: var(--primary); }
        .card-text { color: var(--text-weak); font-size: 0.92rem; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; margin-top: 14px; font-size: 0.85rem; color: var(--text-light); }
        .card-grid { display: grid; gap: 28px; }
        .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
        .card-grid-2 { grid-template-columns: repeat(2, 1fr); }
        @media (max-width: 1024px) {
            .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .card-grid-3, .card-grid-2 { grid-template-columns: 1fr; }
        }

        /* ===== 导航 ===== */
        .header {
            position: fixed; top: 0; left: 0; width: 100%;
            z-index: 1000;
            padding: 16px 0;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled { background: rgba(255,255,255,0.96); box-shadow: var(--shadow-sm); }
        .header .container {
            display: flex; align-items: center; justify-content: space-between;
            gap: 20px;
        }
        .logo {
            font-size: 1.4rem; font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            display: flex; align-items: center; gap: 6px;
        }
        .logo span { color: var(--secondary); }
        .logo:hover { color: var(--primary-dark); }
        .nav-panel {
            display: flex; align-items: center; gap: 8px;
            background: rgba(45,27,105,0.05);
            padding: 6px 8px;
            border-radius: 100px;
            border: 1px solid var(--border-light);
        }
        .nav-link {
            padding: 8px 18px;
            border-radius: 100px;
            font-weight: 600; font-size: 0.9rem;
            color: var(--text-weak);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover { color: var(--primary); background: rgba(45,27,105,0.06); }
        .nav-link.active { color: #fff; background: var(--primary); box-shadow: var(--shadow-sm); }
        .nav-cta { margin-left: 4px; }
        .nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; cursor: pointer; background: none; border: none; }
        .nav-toggle span { display: block; width: 26px; height: 2.5px; background: var(--primary); border-radius: 4px; transition: all var(--transition); }
        @media (max-width: 768px) {
            .nav-panel { display: none; position: absolute; top: 100%; left: 16px; right: 16px; background: #fff; border-radius: var(--radius-md); box-shadow: var(--shadow-lg); padding: 16px; flex-direction: column; border: 1px solid var(--border-light); margin-top: 8px; }
            .nav-panel.open { display: flex; }
            .nav-link { width: 100%; text-align: center; padding: 12px; }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; }
            .nav-toggle { display: flex; }
            .header { padding: 12px 0; }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 80vh;
            display: flex; align-items: center;
            padding: calc(var(--header-height) + 40px) 0 80px;
            position: relative;
            overflow: hidden;
            background: var(--primary-dark);
        }
        .hero-bg {
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(29,15,71,0.88) 0%, rgba(45,27,105,0.72) 50%, rgba(29,15,71,0.88) 100%);
        }
        .hero-content { position: relative; z-index: 2; text-align: center; max-width: 800px; margin: 0 auto; }
        .hero-badge { display: inline-block; padding: 6px 20px; border-radius: 100px; background: rgba(196,149,60,0.18); color: var(--secondary-light); font-size: 0.85rem; font-weight: 600; margin-bottom: 24px; border: 1px solid rgba(196,149,60,0.25); }
        .hero h1 { color: #fff; margin-bottom: 20px; }
        .hero p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 600px; margin: 0 auto 36px; }
        .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
        .hero-wave { position: absolute; bottom: -2px; left: 0; width: 100%; height: 80px; background: url("data:image/svg+xml,%3Csvg viewBox='0 0 1200 80' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M0,40 Q150,0 300,40 Q450,80 600,40 Q750,0 900,40 Q1050,80 1200,40 L1200,80 L0,80 Z' fill='%23F9F7FC'/%3E%3C/svg%3E") center center / cover no-repeat; z-index: 3; }
        @media (max-width: 768px) {
            .hero { min-height: 60vh; padding: calc(var(--header-height) + 20px) 0 60px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 1rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; }
        }

        /* ===== 板块通用 ===== */
        .split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
        .split-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); width: 100%; }
        .split-content h2 { margin-bottom: 16px; }
        .split-content p { color: var(--text-weak); margin-bottom: 20px; }
        .split-content .badge { margin-bottom: 12px; }
        @media (max-width: 768px) {
            .split-grid { grid-template-columns: 1fr; gap: 32px; }
            .split-image { order: -1; }
        }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            padding: 32px 28px;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .category-card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }
        .category-card:hover::before { opacity: 1; }
        .category-card:hover { box-shadow: var(--shadow-md); transform: translateY(-6px); }
        .category-icon { font-size: 2.4rem; margin-bottom: 16px; display: block; }
        .category-card h3 { margin-bottom: 10px; }
        .category-card p { color: var(--text-weak); font-size: 0.92rem; margin-bottom: 18px; }
        .category-card .btn { margin-top: 4px; }

        /* ===== 资讯列表 ===== */
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex; align-items: center; gap: 20px;
            background: var(--bg-card);
            padding: 18px 24px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .news-item:hover { box-shadow: var(--shadow-md); transform: translateX(4px); }
        .news-tag { flex-shrink: 0; }
        .news-info { flex: 1; min-width: 0; }
        .news-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 4px; }
        .news-info h4 a { color: var(--text-strong); }
        .news-info h4 a:hover { color: var(--primary); }
        .news-info p { color: var(--text-weak); font-size: 0.88rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
        .news-meta { flex-shrink: 0; display: flex; align-items: center; gap: 12px; color: var(--text-light); font-size: 0.85rem; }
        @media (max-width: 768px) {
            .news-item { flex-direction: column; align-items: flex-start; gap: 8px; padding: 16px; }
            .news-meta { width: 100%; justify-content: flex-start; }
        }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            position: relative;
        }
        .step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
        .step-number {
            width: 48px; height: 48px; border-radius: 50%;
            background: var(--primary); color: #fff;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.2rem; font-weight: 800;
            margin: 0 auto 16px;
        }
        .step-card h4 { margin-bottom: 8px; }
        .step-card p { color: var(--text-weak); font-size: 0.9rem; }
        @media (max-width: 1024px) {
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 520px) {
            .steps-grid { grid-template-columns: 1fr; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%; padding: 20px 24px;
            display: flex; justify-content: space-between; align-items: center;
            font-weight: 600; font-size: 1rem; color: var(--text-strong);
            background: none; border: none; cursor: pointer;
            text-align: left;
            transition: background var(--transition);
        }
        .faq-question:hover { background: var(--bg-alt); }
        .faq-question::after {
            content: '+'; font-size: 1.4rem; font-weight: 300; color: var(--primary);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question::after { transform: rotate(45deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section .cta-bg {
            position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 700px; margin: 0 auto; }
        .cta-content h2 { color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.7); margin-bottom: 32px; font-size: 1.05rem; }
        .cta-content .btn { margin: 0 8px; }
        @media (max-width: 768px) {
            .cta-section { padding: 60px 0; }
            .cta-content .btn { margin: 6px; }
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--primary-dark);
            padding: 60px 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: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 14px; font-size: 1.3rem; }
        .footer-brand p { color: rgba(255,255,255,0.55); font-size: 0.9rem; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-col a { color: rgba(255,255,255,0.55); font-size: 0.9rem; transition: color var(--transition); }
        .footer-col a:hover { color: var(--secondary-light); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.06); padding-top: 24px; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px; }
        .footer-bottom p { color: rgba(255,255,255,0.4); font-size: 0.85rem; }
        .footer-bottom-links { display: flex; gap: 20px; }
        .footer-bottom-links a { color: rgba(255,255,255,0.4); font-size: 0.85rem; }
        .footer-bottom-links a:hover { color: var(--secondary-light); }
        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: span 2; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-brand { grid-column: span 1; }
        }

        /* ===== 空状态 ===== */
        .empty-state { text-align: center; padding: 40px 20px; color: var(--text-weak); font-size: 1rem; background: var(--bg-alt); border-radius: var(--radius-md); }

        /* ===== 文章页专用 ===== */
        .article-header { padding: calc(var(--header-height) + 40px) 0 40px; background: var(--primary-dark); position: relative; overflow: hidden; }
        .article-header .article-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat; opacity: 0.15; mix-blend-mode: overlay; }
        .article-header .container { position: relative; z-index: 2; }
        .article-header h1 { color: #fff; margin-bottom: 16px; font-size: clamp(1.6rem, 3.5vw, 2.6rem); }
        .article-meta { display: flex; gap: 20px; color: rgba(255,255,255,0.65); font-size: 0.9rem; flex-wrap: wrap; }
        .article-meta span { display: flex; align-items: center; gap: 6px; }
        .article-body { padding: 48px 0 64px; }
        .article-content { max-width: 800px; margin: 0 auto; background: var(--bg-card); padding: 40px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--border-light); }
        .article-content p { margin-bottom: 1.2em; line-height: 1.8; color: var(--text); }
        .article-content img { border-radius: var(--radius-md); margin: 24px 0; width: 100%; }
        .article-content h2, .article-content h3 { margin-top: 32px; margin-bottom: 12px; }
        .article-notfound { text-align: center; padding: 80px 20px; }
        .article-notfound h2 { margin-bottom: 16px; }
        .article-notfound p { color: var(--text-weak); margin-bottom: 24px; }
        @media (max-width: 768px) {
            .article-content { padding: 24px 16px; }
            .article-header { padding: calc(var(--header-height) + 20px) 0 28px; }
        }

        /* ===== 分类页专用 ===== */
        .category-header {
            padding: calc(var(--header-height) + 40px) 0 40px;
            background: var(--primary-dark);
            position: relative; overflow: hidden;
        }
        .category-header .cat-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat; opacity: 0.12; mix-blend-mode: overlay; }
        .category-header .container { position: relative; z-index: 2; text-align: center; }
        .category-header h1 { color: #fff; margin-bottom: 12px; }
        .category-header p { color: rgba(255,255,255,0.65); max-width: 600px; margin: 0 auto; font-size: 1.05rem; }
        .category-list { padding: 48px 0 64px; }
        .category-list .card-grid { margin-top: 32px; }

        /* ===== 响应式辅助 ===== */
        @media (max-width: 1024px) {
            .section { padding: 60px 0; }
        }
        @media (max-width: 768px) {
            .section { padding: 40px 0; }
            .section-subtitle { font-size: 1rem; margin-bottom: 32px; }
        }
        @media (max-width: 520px) {
            :root { --header-height: 68px; }
            .logo { font-size: 1.15rem; }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a45;
            --secondary: #c9a84c;
            --secondary-light: #e0c66a;
            --secondary-dark: #a88a30;
            --accent: #e8a87c;
            --bg-light: #f8f6f2;
            --bg-white: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-footer: #0f0f1a;
            --text-primary: #1a1a2e;
            --text-body: #2d2d44;
            --text-muted: #6b6b80;
            --text-light: #f0ede8;
            --border: #e0dcd4;
            --border-light: #efebe4;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 108, 0.06);
            --shadow: 0 8px 30px rgba(26, 42, 108, 0.10);
            --shadow-lg: 0 20px 50px rgba(26, 42, 108, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
            --space-section: 100px;
            --space-block: 60px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-body);
            background: var(--bg-light);
            padding-top: var(--header-height);
        }

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

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

        a:hover {
            color: var(--secondary);
        }

        a:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        ul {
            list-style: none;
        }

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

        button {
            cursor: pointer;
        }

        button:focus-visible {
            outline: 2px solid var(--secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            :root {
                --space-section: 60px;
                --space-block: 40px;
            }
        }

        /* ===== Header & 导航 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            transition: var(--transition);
        }

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

        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 1px;
        }

        .logo span {
            color: var(--secondary);
        }

        .logo:hover {
            color: var(--primary);
            opacity: 0.9;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-panel .nav-link {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }

        .nav-panel .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.05);
        }

        .nav-panel .nav-link.active {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            font-weight: 600;
        }

        .nav-panel .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 2px;
        }

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

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle:hover span {
            background: var(--secondary);
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav-panel {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px 32px;
                gap: 12px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                pointer-events: none;
            }

            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .nav-panel .nav-link {
                width: 100%;
                text-align: center;
                padding: 12px 18px;
                font-size: 1.1rem;
            }

            .nav-panel .nav-link.active::after {
                display: none;
            }

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

            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
        }

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

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

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

        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 108, 0.25);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 42, 108, 0.15);
        }

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

        .btn-secondary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(201, 168, 76, 0.30);
        }

        .btn-secondary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(201, 168, 76, 0.15);
        }

        .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(26, 42, 108, 0.20);
        }

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

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.9rem;
        }

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }

        /* ===== 文章详情页 Banner ===== */
        .article-banner {
            position: relative;
            padding: 60px 0 50px;
            background: var(--primary-dark);
            background-image: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%), url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            color: var(--text-light);
            margin-top: 0;
        }

        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(15, 26, 69, 0.6) 0%, rgba(26, 42, 108, 0.4) 100%);
            pointer-events: none;
        }

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

        .article-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: rgba(240, 237, 232, 0.7);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }

        .article-banner .breadcrumb a {
            color: rgba(240, 237, 232, 0.8);
            transition: var(--transition);
        }

        .article-banner .breadcrumb a:hover {
            color: var(--secondary-light);
        }

        .article-banner .breadcrumb .sep {
            color: rgba(240, 237, 232, 0.4);
        }

        .article-banner .breadcrumb .current {
            color: var(--secondary-light);
            font-weight: 500;
        }

        .article-banner .category-tag {
            display: inline-block;
            padding: 4px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary-dark);
            background: var(--secondary);
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .article-banner h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.3;
            color: #fff;
            max-width: 800px;
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }

        .article-banner .meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 0.95rem;
            color: rgba(240, 237, 232, 0.75);
            flex-wrap: wrap;
        }

        .article-banner .meta i {
            margin-right: 6px;
            color: var(--secondary-light);
        }

        .article-banner .meta span {
            display: flex;
            align-items: center;
        }

        @media (max-width: 768px) {
            .article-banner {
                padding: 40px 0 36px;
            }
            .article-banner h1 {
                font-size: 1.6rem;
            }
            .article-banner .meta {
                gap: 12px;
                font-size: 0.85rem;
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .article-banner h1 {
                font-size: 1.35rem;
            }
        }

        /* ===== 文章正文区 ===== */
        .article-main {
            padding: var(--space-section) 0;
            background: var(--bg-light);
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }

        .article-content {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 40px 44px;
            border: 1px solid var(--border-light);
        }

        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-body);
        }

        .article-content .content-body p {
            margin-bottom: 1.4em;
        }

        .article-content .content-body h2,
        .article-content .content-body h3 {
            color: var(--text-primary);
            font-weight: 700;
            margin-top: 1.8em;
            margin-bottom: 0.8em;
        }

        .article-content .content-body h2 {
            font-size: 1.6rem;
        }

        .article-content .content-body h3 {
            font-size: 1.25rem;
        }

        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.6em;
        }

        .article-content .content-body li {
            margin-bottom: 0.5em;
        }

        .article-content .content-body ul li {
            list-style: disc;
        }

        .article-content .content-body ol li {
            list-style: decimal;
        }

        .article-content .content-body a {
            color: var(--primary-light);
            text-decoration: underline;
            text-underline-offset: 2px;
        }

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

        .article-content .content-body blockquote {
            border-left: 4px solid var(--secondary);
            padding: 16px 20px;
            margin: 1.6em 0;
            background: rgba(201, 168, 76, 0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
            font-style: italic;
        }

        .article-content .content-body img {
            border-radius: var(--radius-sm);
            margin: 1.6em 0;
            box-shadow: var(--shadow-sm);
        }

        .article-content .content-body pre {
            background: var(--bg-dark);
            color: #e0e0e0;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.6em 0;
        }

        .article-content .content-body code {
            font-family: 'Fira Code', 'JetBrains Mono', monospace;
            background: rgba(26, 42, 108, 0.06);
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }

        .article-content .content-body pre code {
            background: none;
            padding: 0;
            border-radius: 0;
        }

        .article-content .not-found {
            text-align: center;
            padding: 60px 20px;
        }

        .article-content .not-found i {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }

        .article-content .not-found h2 {
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .article-content .not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .article-content .not-found .btn {
            display: inline-flex;
        }

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

        @media (max-width: 768px) {
            .article-content {
                padding: 24px 20px;
            }
            .article-content .content-body {
                font-size: 1rem;
            }
            .article-content .content-body h2 {
                font-size: 1.3rem;
            }
            .article-content .content-body h3 {
                font-size: 1.1rem;
            }
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .sidebar-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
        }

        .sidebar-card .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .sidebar-card .card-title i {
            color: var(--secondary);
        }

        .sidebar-card .side-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .sidebar-card .side-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .sidebar-card .side-list li:last-child {
            border-bottom: none;
        }

        .sidebar-card .side-list a {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-body);
            transition: var(--transition);
            line-height: 1.5;
        }

        .sidebar-card .side-list a:hover {
            color: var(--primary);
        }

        .sidebar-card .side-list a .num {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(26, 42, 108, 0.06);
            border-radius: 50%;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }

        .sidebar-card .side-list a:hover .num {
            background: var(--secondary);
            color: var(--primary-dark);
        }

        .sidebar-card .side-list a .text {
            flex: 1;
        }

        .sidebar-card .side-list a .text .date {
            display: block;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: #fff;
            border-color: transparent;
            text-align: center;
        }

        .sidebar-cta .card-title {
            color: #fff;
            border-bottom-color: rgba(255, 255, 255, 0.15);
        }

        .sidebar-cta .card-title i {
            color: var(--secondary-light);
        }

        .sidebar-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .sidebar-cta .btn {
            width: 100%;
        }

        @media (max-width: 1024px) {
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 600px) {
            .article-sidebar {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 相关文章区 ===== */
        .related-section {
            padding: 0 0 var(--space-section);
            background: var(--bg-light);
        }

        .related-section .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 16px;
        }

        .related-section .section-header h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .related-section .section-header .btn {
            flex-shrink: 0;
        }

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

        .related-card {
            background: var(--bg-white);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }

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

        .related-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }

        .related-card .card-body {
            padding: 20px 22px 24px;
        }

        .related-card .card-body .cat {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
            padding: 3px 12px;
            border-radius: 12px;
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }

        .related-card .card-body h3 {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card .card-body h3 a {
            color: var(--text-primary);
        }

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

        .related-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-card .card-body .meta-sm {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 12px;
        }

        .related-card .card-body .meta-sm i {
            margin-right: 4px;
            color: var(--secondary);
        }

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

        @media (max-width: 600px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-section .section-header h2 {
                font-size: 1.3rem;
            }
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-footer);
            color: rgba(240, 237, 232, 0.7);
            padding: 60px 0 0;
            border-top: 3px solid var(--secondary);
        }

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

        .footer .footer-brand .logo {
            font-size: 1.6rem;
            margin-bottom: 16px;
            color: #fff;
        }

        .footer .footer-brand .logo span {
            color: var(--secondary-light);
        }

        .footer .footer-brand p {
            font-size: 0.95rem;
            line-height: 1.7;
            color: rgba(240, 237, 232, 0.6);
            max-width: 360px;
        }

        .footer .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 28px;
            height: 2px;
            background: var(--secondary);
            border-radius: 2px;
        }

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

        .footer .footer-col ul li a {
            color: rgba(240, 237, 232, 0.6);
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .footer .footer-col ul li a:hover {
            color: var(--secondary-light);
            padding-left: 4px;
        }

        .footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 24px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(240, 237, 232, 0.4);
        }

        .footer .footer-bottom a {
            color: rgba(240, 237, 232, 0.5);
            margin-left: 16px;
            transition: var(--transition);
        }

        .footer .footer-bottom a:hover {
            color: var(--secondary-light);
        }

        .footer .footer-bottom-links {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .footer .footer-bottom-links a {
            margin-left: 0;
            padding: 0 8px;
        }

        .footer .footer-bottom-links a+ a {
            border-left: 1px solid rgba(255, 255, 255, 0.1);
        }

        @media (max-width: 900px) {
            .footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .footer .footer-bottom-links {
                justify-content: center;
            }
        }

        /* ===== 通用工具 ===== */
        .text-center {
            text-align: center;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== 动画 ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .animate-in-delay-1 {
            animation-delay: 0.1s;
        }
        .animate-in-delay-2 {
            animation-delay: 0.2s;
        }
        .animate-in-delay-3 {
            animation-delay: 0.3s;
        }

        /* ===== 移动端导航 JS 补充 ===== */
        @media (max-width: 768px) {
            .nav-panel.open {
                display: flex;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a8e;
            --primary-dark: #0f1a4a;
            --accent: #e8b84b;
            --accent-light: #f0d07a;
            --accent-dark: #c99a2e;
            --bg: #f8f7f4;
            --bg-alt: #eeede8;
            --bg-dark: #1a1a2e;
            --text: #1e1e2a;
            --text-light: #5a5a6e;
            --text-muted: #8a8a9e;
            --border: #dcdad0;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 22px;
            --shadow: 0 6px 24px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 14px 36px rgba(0, 0, 0, 0.10);
            --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.04);
            --transition: 0.28s cubic-bezier(0.22, 0.61, 0.36, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 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);
            font-size: 16px;
            line-height: 1.6;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-h);
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            color: var(--text);
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2.2rem;
            letter-spacing: -0.015em;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            color: var(--text-light);
            margin-bottom: 0.8rem;
        }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            border: 2px solid transparent;
            background: var(--primary);
            color: #fff;
            text-align: center;
            white-space: nowrap;
            user-select: none;
        }
        .btn:hover {
            background: var(--primary-light);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(26, 42, 108, 0.18);
        }
        .btn:active {
            transform: scale(0.97);
        }
        .btn:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-light);
            border-color: var(--primary-light);
        }
        .btn-secondary {
            background: var(--accent);
            color: var(--text);
            border-color: var(--accent);
        }
        .btn-secondary:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            box-shadow: 0 8px 24px rgba(232, 184, 75, 0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius);
        }

        /* ===== Header / Nav ===== */
        .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(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.02);
            transition: background var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.55rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.03em;
            line-height: 1.2;
        }
        .logo span {
            color: var(--accent);
        }
        .logo:hover {
            color: var(--primary);
            opacity: 0.9;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-alt);
            padding: 4px 18px;
            border-radius: 60px;
            box-shadow: inset 0 1px 4px rgba(0, 0, 0, 0.02);
        }
        .nav-link {
            position: relative;
            padding: 8px 18px;
            font-size: 0.92rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: 30px;
            transition: all var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.06);
        }
        .nav-link.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 2px 8px rgba(26, 42, 108, 0.18);
        }
        .nav-link.active:hover {
            color: #fff;
            background: var(--primary-light);
        }
        .nav-cta {
            margin-left: 6px;
        }
        .nav-cta .btn {
            padding: 6px 18px;
            font-size: 0.82rem;
            border-radius: 30px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            background: var(--bg-alt);
            border-radius: 8px;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2.5px;
            background: var(--text);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .banner {
            position: relative;
            padding: 100px 0 80px;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 26, 74, 0.88) 0%, rgba(26, 42, 108, 0.70) 60%, rgba(0, 0, 0, 0.45) 100%);
            z-index: 1;
        }
        .banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .banner h1 {
            color: #fff;
            font-size: 3rem;
            margin-bottom: 18px;
            text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .banner p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        .banner .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Sections ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: #fff;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #fff;
        }
        .section-dark p {
            color: rgba(255, 255, 255, 0.78);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px;
        }
        .section-header h2 {
            margin-bottom: 16px;
        }
        .section-header p {
            font-size: 1.05rem;
            color: var(--text-muted);
        }
        .section-header .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            background: var(--accent);
            color: var(--text);
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 12px;
            text-transform: uppercase;
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: var(--bg-alt);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: 18px;
            transition: background var(--transition);
        }
        .card:hover .card-icon {
            background: var(--primary);
            color: #fff;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
        }
        .card p {
            font-size: 0.92rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card .tag {
            display: inline-block;
            margin-top: 14px;
            padding: 2px 12px;
            border-radius: 20px;
            background: var(--bg-alt);
            font-size: 0.75rem;
            color: var(--text-light);
            font-weight: 500;
        }

        /* ===== Guide Cards (larger) ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 30px;
        }
        .guide-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .guide-card .card-img {
            height: 200px;
            background: var(--bg-alt) center center / cover no-repeat;
            position: relative;
        }
        .guide-card .card-img .badge-overlay {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 4px 14px;
            border-radius: 20px;
            background: rgba(26, 42, 108, 0.82);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            backdrop-filter: blur(4px);
        }
        .guide-card .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .guide-card .card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            flex: 1;
        }
        .guide-card .card-body .btn-link {
            margin-top: 16px;
            align-self: flex-start;
            font-weight: 600;
            color: var(--primary);
            font-size: 0.88rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .guide-card .card-body .btn-link i {
            transition: transform var(--transition);
        }
        .guide-card .card-body .btn-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Expert Section ===== */
        .expert-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .expert-wrap .expert-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            aspect-ratio: 4/3;
            background: var(--bg-alt) url('/assets/images/coverpic/cover-3.png') center center / cover no-repeat;
            position: relative;
        }
        .expert-wrap .expert-image::after {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.08);
            pointer-events: none;
        }
        .expert-content {
            padding: 10px 0;
        }
        .expert-content .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            background: var(--accent);
            color: var(--text);
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 14px;
        }
        .expert-content h2 {
            font-size: 2rem;
            margin-bottom: 18px;
        }
        .expert-content p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .expert-content ul {
            margin-top: 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px 20px;
        }
        .expert-content ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.92rem;
            color: var(--text-light);
        }
        .expert-content ul li i {
            color: var(--accent);
            font-size: 0.9rem;
            width: 18px;
        }

        /* ===== Stats ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-item {
            padding: 20px 10px;
        }
        .stat-item .stat-num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }
        .stat-item .stat-label {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 6px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--border);
            padding: 0 22px;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }
        .faq-item summary {
            padding: 18px 0;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            list-style: none;
            color: var(--text);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding: 0 0 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
            border-top: 1px solid var(--border);
            padding-top: 16px;
        }

        /* ===== CTA ===== */
        .cta-box {
            background: var(--primary);
            border-radius: var(--radius-lg);
            padding: 60px 50px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }
        .cta-box * {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 14px;
        }
        .cta-box p {
            color: rgba(255, 255, 255, 0.8);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-box .btn {
            background: var(--accent);
            color: var(--text);
            border-color: var(--accent);
        }
        .cta-box .btn:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }
        .footer .logo {
            color: #fff;
        }
        .footer .logo span {
            color: var(--accent);
        }
        .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, 0.06);
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            margin-top: 12px;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom-links {
            display: flex;
            gap: 20px;
        }
        .footer-bottom-links a {
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.82rem;
        }
        .footer-bottom-links a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .expert-wrap {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .expert-wrap .expert-image {
                aspect-ratio: 16/9;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-h: 64px;
            }
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            h3 {
                font-size: 1.2rem;
            }
            .banner {
                padding: 70px 0 56px;
                min-height: 300px;
            }
            .banner h1 {
                font-size: 2.2rem;
            }
            .banner p {
                font-size: 1rem;
            }
            .section {
                padding: 56px 0;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: 18px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .expert-content ul {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-num {
                font-size: 2rem;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            /* Navigation mobile */
            .nav-panel {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                border-radius: 0 0 20px 20px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
                gap: 10px;
                transform: translateY(-120%);
                opacity: 0;
                transition: all var(--transition);
                border-top: 1px solid var(--border);
                align-items: stretch;
            }
            .nav-panel.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-link {
                padding: 12px 18px;
                font-size: 1rem;
                border-radius: 10px;
                text-align: center;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 6px;
                text-align: center;
            }
            .nav-cta .btn {
                width: 100%;
                padding: 10px;
                font-size: 0.9rem;
            }
            .nav-toggle {
                display: flex;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            h1 {
                font-size: 1.7rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .banner h1 {
                font-size: 1.8rem;
            }
            .banner p {
                font-size: 0.92rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .guide-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item .stat-num {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .cta-box {
                padding: 32px 18px;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn-group .btn {
                width: 100%;
                max-width: 280px;
            }
            .expert-content ul {
                grid-template-columns: 1fr;
            }
            .faq-item summary {
                font-size: 0.92rem;
            }
        }

        /* ===== Utility ===== */
        .mt-1 {
            margin-top: 10px;
        }
        .mt-2 {
            margin-top: 20px;
        }
        .mt-3 {
            margin-top: 36px;
        }
        .text-center {
            text-align: center;
        }
        .gap-lg {
            gap: 40px;
        }

        /* ===== deco wave ===== */
        .wave-divider {
            height: 40px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 40'%3E%3Cpath d='M0 20 Q 150 0, 300 20 T 600 20 T 900 20 T 1200 20 L 1200 40 L 0 40 Z' fill='%23eeede8'/%3E%3C/svg%3E") center top / cover no-repeat;
            margin-top: -1px;
        }
        .wave-divider-dark {
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 40'%3E%3Cpath d='M0 20 Q 150 0, 300 20 T 600 20 T 900 20 T 1200 20 L 1200 40 L 0 40 Z' fill='%231a1a2e'/%3E%3C/svg%3E") center top / cover no-repeat;
        }