/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-light: #3b82f6;
            --primary-dark: #0f3a8e;
            --primary-bg: #eff6ff;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --accent: #10b981;
            --accent-light: #d1fae5;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-secondary: #475569;
            --text-weak: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.2s ease;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== 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-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: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        button:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 6px; }
        input, textarea { font-family: inherit; font-size: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.75rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.375rem; }
        h4 { font-size: 1.125rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }
        p:last-child { margin-bottom: 0; }

        /* ===== 容器 ===== */
        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 880px; }

        /* ===== 通用板块 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-title { text-align: center; margin-bottom: 16px; }
        .section-subtitle { text-align: center; max-width: 640px; margin: 0 auto 48px; color: var(--text-secondary); font-size: 1.1rem; }
        .section-divider { width: 60px; height: 4px; background: var(--primary); border-radius: 4px; margin: 16px auto 20px; }

        /* ===== 导航 ===== */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: var(--header-height);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }
        .header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px;
        }
        .header-logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.35rem; font-weight: 800; color: var(--text);
            letter-spacing: -0.02em;
        }
        .header-logo i { color: var(--primary); font-size: 1.5rem; }
        .header-logo span { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-nav { display: flex; align-items: center; gap: 8px; }
        .header-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;
        }
        .header-nav a:hover { color: var(--primary); background: var(--primary-bg); }
        .header-nav a.active { color: var(--primary); background: var(--primary-bg); font-weight: 600; }
        .header-nav a.active::after {
            content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%);
            width: 20px; height: 3px; border-radius: 4px; background: var(--primary);
        }
        .header-actions { display: flex; align-items: center; gap: 12px; }
        .header-search {
            display: flex; align-items: center; gap: 8px;
            background: var(--bg-alt); border: 1px solid var(--border); border-radius: 40px;
            padding: 6px 16px 6px 18px; transition: all var(--transition);
        }
        .header-search:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,0.12); }
        .header-search input {
            border: none; background: transparent; padding: 4px 0;
            font-size: 0.9rem; color: var(--text); width: 140px; outline: none;
        }
        .header-search input::placeholder { color: var(--text-weak); }
        .header-search i { color: var(--text-weak); font-size: 0.9rem; }
        .header-cta {
            display: inline-flex; align-items: center; gap: 8px;
            background: var(--primary); color: #fff; border-radius: 40px;
            padding: 8px 22px; font-size: 0.9rem; font-weight: 600;
            transition: all var(--transition); border: none;
        }
        .header-cta:hover { background: var(--primary-dark); color: #fff; transform: translateY(-1px); box-shadow: var(--shadow); }
        .header-cta:active { transform: translateY(0); }

        /* 移动端汉堡 */
        .hamburger { display: none; flex-direction: column; gap: 5px; padding: 6px; cursor: pointer; background: none; border: none; }
        .hamburger span { display: block; width: 24px; height: 2.5px; background: var(--text); border-radius: 4px; transition: all var(--transition); }
        .hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        /* ===== Hero ===== */
        .hero {
            padding: 140px 0 100px; margin-top: var(--header-height);
            background: linear-gradient(135deg, var(--primary-bg) 0%, #eef2ff 50%, #f0fdf4 100%);
            position: relative; overflow: hidden;
        }
        .hero::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.08; pointer-events: none;
        }
        .hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; position: relative; z-index: 1; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(26,86,219,0.1); color: var(--primary); border-radius: 40px;
            padding: 6px 18px; font-size: 0.85rem; font-weight: 600; margin-bottom: 20px;
        }
        .hero-badge i { font-size: 0.8rem; }
        .hero h1 { margin-bottom: 20px; max-width: 580px; }
        .hero p { font-size: 1.15rem; max-width: 520px; margin-bottom: 32px; }
        .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-btn-primary {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--primary); color: #fff; border-radius: 40px;
            padding: 14px 32px; font-size: 1rem; font-weight: 600;
            transition: all var(--transition); border: none;
        }
        .hero-btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .hero-btn-secondary {
            display: inline-flex; align-items: center; gap: 10px;
            background: var(--bg); color: var(--text); border-radius: 40px;
            padding: 14px 32px; font-size: 1rem; font-weight: 600;
            border: 1.5px solid var(--border); transition: all var(--transition);
        }
        .hero-btn-secondary:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--shadow-sm); transform: translateY(-2px); }
        .hero-image {
            display: flex; justify-content: center; align-items: center;
            background: rgba(255,255,255,0.5); border-radius: var(--radius-lg);
            padding: 20px; box-shadow: var(--shadow-lg); border: 1px solid rgba(255,255,255,0.6);
        }
        .hero-image img { border-radius: var(--radius); width: 100%; max-width: 520px; }
        .hero-stats { display: flex; gap: 40px; margin-top: 40px; flex-wrap: wrap; }
        .hero-stat { text-align: center; }
        .hero-stat-number { font-size: 1.75rem; font-weight: 800; color: var(--primary); }
        .hero-stat-label { font-size: 0.85rem; color: var(--text-weak); margin-top: 2px; }

        /* ===== 快速入口 / 分类卡片 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; }
        .category-card {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
            padding: 28px 24px; text-align: center; transition: all var(--transition);
        }
        .category-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .category-card-icon {
            width: 56px; height: 56px; border-radius: 16px; margin: 0 auto 16px;
            display: flex; align-items: center; justify-content: center;
            background: var(--primary-bg); color: var(--primary); font-size: 1.5rem;
        }
        .category-card h3 { margin-bottom: 8px; font-size: 1.1rem; }
        .category-card p { font-size: 0.9rem; color: var(--text-weak); margin-bottom: 0; }
        .category-card .tag { margin-top: 12px; }

        /* ===== 标签 ===== */
        .tag {
            display: inline-block; padding: 3px 14px; border-radius: 40px;
            font-size: 0.75rem; font-weight: 600; background: var(--primary-bg); color: var(--primary);
        }
        .tag-green { background: var(--accent-light); color: #065f46; }
        .tag-yellow { background: #fef3c7; color: #92400e; }
        .tag-blue { background: var(--primary-bg); color: var(--primary); }

        /* ===== 内容卡片列表 ===== */
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 28px; }
        .card-item {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
            overflow: hidden; transition: all var(--transition);
        }
        .card-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .card-item-img { width: 100%; height: 200px; object-fit: cover; background: var(--bg-alt); }
        .card-item-body { padding: 22px 24px 24px; }
        .card-item-meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-weak); margin-bottom: 10px; }
        .card-item-meta .tag { font-size: 0.7rem; padding: 2px 12px; }
        .card-item h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .card-item h3 a { color: var(--text); }
        .card-item h3 a:hover { color: var(--primary); }
        .card-item p { font-size: 0.92rem; color: var(--text-secondary); margin-bottom: 14px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .card-item-footer { display: flex; align-items: center; justify-content: space-between; font-size: 0.82rem; color: var(--text-weak); }
        .card-item-footer a { font-weight: 600; font-size: 0.85rem; }

        /* ===== 流程步骤 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 32px; counter-reset: step; }
        .step-card { text-align: center; position: relative; padding: 32px 20px; }
        .step-card::before { counter-increment: step; content: counter(step); position: absolute; top: -8px; left: 50%; transform: translateX(-50%); width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; font-weight: 800; font-size: 1rem; display: flex; align-items: center; justify-content: center; box-shadow: 0 4px 12px rgba(26,86,219,0.3); }
        .step-card-icon { font-size: 2.2rem; color: var(--primary); margin-bottom: 16px; margin-top: 16px; }
        .step-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== 功能特点 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
        .feature-card {
            background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
            padding: 28px 24px; transition: all var(--transition); display: flex; gap: 18px; align-items: flex-start;
        }
        .feature-card:hover { box-shadow: var(--shadow); border-color: var(--primary-light); }
        .feature-card-icon {
            flex-shrink: 0; width: 48px; height: 48px; border-radius: 14px;
            display: flex; align-items: center; justify-content: center;
            background: var(--primary-bg); color: var(--primary); font-size: 1.2rem;
        }
        .feature-card h3 { font-size: 1.05rem; margin-bottom: 6px; }
        .feature-card p { font-size: 0.88rem; color: var(--text-secondary); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; background: var(--bg-card); transition: all var(--transition); }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-question {
            display: flex; align-items: center; justify-content: space-between;
            padding: 18px 24px; font-size: 1rem; font-weight: 600; color: var(--text);
            cursor: pointer; background: none; border: none; width: 100%; text-align: left;
            transition: all var(--transition); gap: 16px;
        }
        .faq-question i { color: var(--text-weak); transition: transform var(--transition); font-size: 0.85rem; flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
        .faq-answer { padding: 0 24px 18px; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; display: none; }
        .faq-item.active .faq-answer { display: block; }
        .faq-item.active { border-color: var(--primary-light); box-shadow: var(--shadow-sm); }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg); padding: 64px 48px; 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: 0.06; pointer-events: none; }
        .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; position: relative; }
        .cta-section p { color: rgba(255,255,255,0.85); font-size: 1.1rem; max-width: 520px; margin: 0 auto 32px; position: relative; }
        .cta-btn {
            display: inline-flex; align-items: center; gap: 10px;
            background: #fff; color: var(--primary); border-radius: 40px;
            padding: 14px 36px; font-size: 1rem; font-weight: 700;
            transition: all var(--transition); border: none; position: relative;
        }
        .cta-btn:hover { background: var(--secondary-light); transform: translateY(-2px); box-shadow: 0 12px 32px rgba(0,0,0,0.2); color: var(--primary-dark); }
        .cta-btn i { font-size: 0.9rem; }

        /* ===== 页脚 ===== */
        .footer { background: var(--text); color: rgba(255,255,255,0.7); padding: 56px 0 32px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }
        .footer-brand .header-logo { margin-bottom: 12px; }
        .footer-brand .header-logo span { -webkit-text-fill-color: #fff; color: #fff; }
        .footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 300px; }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
        .footer a { color: rgba(255,255,255,0.7); font-size: 0.9rem; display: block; padding: 4px 0; transition: all var(--transition); }
        .footer a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); margin-top: 40px; padding-top: 24px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.85rem; color: rgba(255,255,255,0.5); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .hero-grid { grid-template-columns: 1fr; gap: 32px; text-align: center; }
            .hero h1 { max-width: 100%; }
            .hero p { max-width: 100%; }
            .hero-actions { justify-content: center; }
            .hero-stats { justify-content: center; }
            .hero-image { max-width: 480px; margin: 0 auto; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .section { padding: 64px 0; }
            h1 { font-size: 2.25rem; }
            h2 { font-size: 1.65rem; }
        }
        @media (max-width: 768px) {
            .header-nav { display: none; }
            .header-nav.open { display: flex; flex-direction: column; position: absolute; top: var(--header-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(16px); padding: 16px 24px 24px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); gap: 4px; }
            .header-nav.open a { padding: 12px 18px; border-radius: var(--radius-sm); font-size: 1rem; }
            .header-nav.open a.active::after { display: none; }
            .header-search { display: none; }
            .header-search.open { display: flex; width: 100%; margin-top: 8px; }
            .hamburger { display: flex; }
            .hero { padding: 120px 0 72px; }
            .hero-stats { gap: 24px; }
            .hero-stat-number { font-size: 1.4rem; }
            .card-grid { grid-template-columns: 1fr; }
            .category-grid { grid-template-columns: 1fr 1fr; }
            .features-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
            .cta-section { padding: 48px 24px; border-radius: var(--radius); }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section { padding: 48px 0; }
            h1 { font-size: 1.85rem; }
            h2 { font-size: 1.45rem; }
            .container { padding: 0 16px; }
        }
        @media (max-width: 520px) {
            .category-grid { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-btn-primary, .hero-btn-secondary { width: 100%; justify-content: center; }
            .header-cta { padding: 8px 16px; font-size: 0.82rem; }
            .header-logo { font-size: 1.1rem; }
            .faq-question { padding: 14px 16px; font-size: 0.92rem; }
            .faq-answer { padding: 0 16px 14px; }
            .card-item-body { padding: 16px 18px 18px; }
            .card-item-img { height: 160px; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .empty-state { text-align: center; padding: 48px 24px; color: var(--text-weak); font-size: 1rem; background: var(--bg-alt); border-radius: var(--radius); border: 1px dashed var(--border); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a4b8c;
            --primary-light: #2a6bc4;
            --primary-dark: #0f2d5a;
            --secondary: #f59e0b;
            --secondary-light: #fbbf24;
            --secondary-dark: #d97706;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --text-main: #1e293b;
            --text-light: #64748b;
            --text-white: #ffffff;
            --border-color: #e2e8f0;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --space-xs: 8px;
            --space-sm: 16px;
            --space-md: 32px;
            --space-lg: 56px;
            --space-xl: 80px;
            --max-width: 1200px;
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --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;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-main);
        }
        h1 {
            font-size: 2.8rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.4rem;
        }
        h4 {
            font-size: 1.1rem;
        }
        p {
            margin-bottom: 1rem;
        }

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

        /* ===== Header / Navigation ===== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--space-md);
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary-dark);
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .header-logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .header-logo:hover {
            color: var(--primary);
        }
        .header-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-nav a {
            padding: 8px 18px;
            border-radius: 40px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: background var(--transition), color var(--transition);
            text-decoration: none;
            position: relative;
        }
        .header-nav a:hover {
            background: rgba(26, 75, 140, 0.06);
            color: var(--primary);
        }
        .header-nav a.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 12px rgba(26, 75, 140, 0.25);
        }
        .header-nav a.active:hover {
            background: var(--primary-light);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border: 1px solid var(--border-color);
            border-radius: 40px;
            padding: 6px 16px 6px 18px;
            transition: border-color var(--transition), box-shadow var(--transition);
            width: 200px;
        }
        .header-search:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(26, 75, 140, 0.1);
        }
        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            width: 100%;
            font-size: 0.9rem;
            color: var(--text-main);
            padding: 4px 0;
        }
        .header-search input::placeholder {
            color: var(--text-light);
            font-size: 0.85rem;
        }
        .header-search i {
            color: var(--text-light);
            font-size: 0.9rem;
            margin-left: 6px;
        }
        .header-cta {
            padding: 8px 22px;
            border-radius: 40px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 0.9rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .header-cta:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
        }
        .header-cta:active {
            transform: scale(0.97);
        }
        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .mobile-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--text-main);
            border-radius: 4px;
            transition: all 0.3s ease;
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: var(--space-xl) var(--space-md);
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
            overflow: hidden;
            isolation: isolate;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(245, 158, 11, 0.15) 0%, transparent 60%);
            z-index: 1;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
        }
        .category-hero .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 40px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(4px);
            color: var(--text-white);
            font-size: 0.85rem;
            font-weight: 500;
            letter-spacing: 0.5px;
            margin-bottom: var(--space-sm);
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        .category-hero h1 {
            font-size: 3rem;
            color: var(--text-white);
            margin-bottom: var(--space-sm);
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
            letter-spacing: -0.5px;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 620px;
            margin: 0 auto var(--space-md);
            line-height: 1.7;
        }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: var(--space-md);
            flex-wrap: wrap;
            margin-top: var(--space-sm);
        }
        .hero-stat-item {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(4px);
            border-radius: var(--radius-md);
            padding: 14px 28px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            text-align: center;
            min-width: 120px;
        }
        .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--secondary-light);
            display: block;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3 {
            color: var(--text-white);
        }
        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto var(--space-lg);
        }
        .section-header h2 {
            margin-bottom: var(--space-xs);
            position: relative;
        }
        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .section-header p {
            color: var(--text-light);
            font-size: 1.05rem;
            margin-top: var(--space-sm);
        }
        .section-dark .section-header p {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--space-md);
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .card .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(26, 75, 140, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--primary);
            margin-bottom: var(--space-sm);
        }
        .card h3 {
            margin-bottom: 8px;
            font-size: 1.2rem;
        }
        .card p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .card .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 40px;
            background: rgba(245, 158, 11, 0.12);
            color: var(--secondary-dark);
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: var(--space-sm);
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--space-md);
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: var(--space-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }
        .step-card .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.3rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--space-sm);
            box-shadow: 0 4px 12px rgba(26, 75, 140, 0.25);
        }
        .step-card h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
        }
        .step-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== Tips List ===== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--space-md);
        }
        .tip-item {
            display: flex;
            gap: var(--space-sm);
            background: var(--bg-card);
            padding: var(--space-sm) var(--space-md);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: box-shadow var(--transition), transform var(--transition);
            align-items: flex-start;
        }
        .tip-item:hover {
            box-shadow: var(--shadow-sm);
            transform: translateY(-2px);
        }
        .tip-item .tip-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(245, 158, 11, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 1.1rem;
        }
        .tip-item .tip-content h4 {
            font-size: 1rem;
            margin-bottom: 4px;
        }
        .tip-item .tip-content p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--space-sm);
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: var(--space-sm) var(--space-md);
            font-weight: 600;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            color: var(--text-main);
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(26, 75, 140, 0.03);
        }
        .faq-question i {
            transition: transform 0.3s ease;
            color: var(--text-light);
            font-size: 0.9rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 var(--space-md) var(--space-sm);
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }
        .faq-answer p:last-child {
            margin-bottom: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: var(--space-xl) 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            color: var(--text-white);
            margin-bottom: var(--space-xs);
        }
        .cta-section p {
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto var(--space-md);
            font-size: 1.05rem;
        }
        .cta-section .cta-btn {
            display: inline-block;
            padding: 14px 40px;
            border-radius: 50px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            text-decoration: none;
        }
        .cta-section .cta-btn:hover {
            background: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(245, 158, 11, 0.35);
            color: #fff;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: var(--space-lg) 0 var(--space-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--space-lg);
            margin-bottom: var(--space-lg);
        }
        .footer-brand .header-logo {
            color: var(--text-white);
            margin-bottom: var(--space-xs);
        }
        .footer-brand .header-logo:hover {
            color: var(--secondary-light);
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            margin-top: var(--space-xs);
            max-width: 320px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            margin-bottom: var(--space-sm);
            font-weight: 600;
        }
        .footer a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: color var(--transition);
            text-decoration: none;
        }
        .footer a:hover {
            color: var(--secondary-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: var(--space-md);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: var(--space-sm);
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--space-md);
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 2rem;
            }
            h2 {
                font-size: 1.6rem;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .category-hero {
                min-height: 260px;
                padding: var(--space-lg) var(--space-md);
            }
            .hero-stats {
                gap: var(--space-sm);
            }
            .hero-stat-item {
                padding: 10px 18px;
                min-width: 90px;
            }
            .hero-stat-item .num {
                font-size: 1.4rem;
            }

            .header-nav {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: var(--space-sm) var(--space-md);
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                gap: 4px;
            }
            .header-nav.open {
                display: flex;
            }
            .header-nav a {
                padding: 10px 16px;
                border-radius: var(--radius-sm);
                width: 100%;
            }
            .header-nav a.active {
                background: var(--primary);
                color: #fff;
            }
            .mobile-toggle {
                display: flex;
            }
            .header-search {
                width: 140px;
            }
            .header-actions .header-cta {
                padding: 8px 16px;
                font-size: 0.8rem;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: var(--space-sm);
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: var(--space-sm);
            }
            .tips-grid {
                grid-template-columns: 1fr;
                gap: var(--space-sm);
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: var(--space-md);
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .section {
                padding: var(--space-lg) 0;
            }
            .section-header {
                margin-bottom: var(--space-md);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 var(--space-sm);
            }
            .header-inner {
                padding: 0 var(--space-sm);
                height: 60px;
            }
            .header-logo {
                font-size: 1.1rem;
            }
            .header-logo i {
                font-size: 1.2rem;
            }
            .header-search {
                width: 100px;
            }
            .header-search input::placeholder {
                font-size: 0.75rem;
            }
            .header-actions .header-cta {
                padding: 6px 12px;
                font-size: 0.75rem;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .hero-stat-item {
                padding: 8px 14px;
                min-width: 70px;
            }
            .hero-stat-item .num {
                font-size: 1.2rem;
            }
            .hero-stat-item .label {
                font-size: 0.75rem;
            }
            h2 {
                font-size: 1.4rem;
            }
            .card {
                padding: var(--space-sm);
            }
            .step-card {
                padding: var(--space-sm);
            }
            .tip-item {
                flex-direction: column;
                padding: var(--space-sm);
            }
            .faq-question {
                padding: var(--space-sm);
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 var(--space-sm) var(--space-sm);
                font-size: 0.9rem;
            }
            .cta-section .cta-btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2d4a9e;
            --primary-dark: #0f1a4a;
            --secondary: #f0c040;
            --secondary-light: #f5d870;
            --secondary-dark: #d4a830;
            --accent: #e85d3a;
            --bg: #f8f9fc;
            --bg-alt: #eef0f7;
            --bg-card: #ffffff;
            --text: #1e2235;
            --text-weak: #6b7089;
            --text-light: #8e93af;
            --border: #e2e5ee;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
            --shadow: 0 8px 30px rgba(0,0,0,0.07);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.10);
            --transition: 0.28s cubic-bezier(0.25,0.46,0.45,0.94);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --max-width: 1180px;
            --header-h: 72px;
            --nav-gap: 32px;
        }

        /* ===== 基础 Reset ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; }
        body {
            font-family: var(--font);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        a { color: var(--primary); text-decoration: none; transition: color 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: 1rem; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary-dark); }
        h1 { font-size: 2.4rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.2rem; }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / 导航 ===== */
        .header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--header-h);
            background: rgba(255,255,255,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .header.scrolled { background: rgba(255,255,255,0.97); box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .header-logo i { font-size: 1.6rem; color: var(--secondary); }
        .header-logo span { background: linear-gradient(135deg, var(--primary-dark), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .header-nav {
            display: flex;
            align-items: center;
            gap: var(--nav-gap);
        }
        .header-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-weak);
            padding: 6px 4px;
            border-bottom: 2px solid transparent;
            transition: color var(--transition), border-color var(--transition);
        }
        .header-nav a:hover,
        .header-nav a.active { color: var(--primary); border-bottom-color: var(--secondary); }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 16px;
        }
        .header-search {
            display: flex;
            align-items: center;
            background: var(--bg-alt);
            border-radius: 40px;
            padding: 6px 16px 6px 18px;
            gap: 8px;
            border: 1px solid transparent;
            transition: border-color var(--transition), background var(--transition);
        }
        .header-search:focus-within { border-color: var(--secondary); background: #fff; }
        .header-search i { color: var(--text-light); font-size: 0.9rem; }
        .header-search input {
            border: none;
            background: transparent;
            outline: none;
            padding: 6px 0;
            width: 140px;
            font-size: 0.9rem;
            color: var(--text);
        }
        .header-search input::placeholder { color: var(--text-light); }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            background: var(--primary);
            color: #fff;
        }
        .btn:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(26,42,108,0.25); }
        .btn-secondary {
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .btn-secondary:hover { background: var(--secondary-light); color: var(--primary-dark); box-shadow: 0 8px 24px rgba(240,192,64,0.35); }
        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-outline:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
        .btn-sm { padding: 6px 20px; font-size: 0.85rem; }
        .header-cta .btn { padding: 8px 24px; font-size: 0.9rem; }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            background: none;
            border: none;
            padding: 6px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--primary-dark);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

        /* ===== 文章详情页 ===== */
        .article-banner {
            padding-top: calc(var(--header-h) + 60px);
            padding-bottom: 50px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 70%, #3a5aae 100%);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .article-banner .container-narrow {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 24px;
        }
        .article-breadcrumb a { color: rgba(255,255,255,0.8); }
        .article-breadcrumb a:hover { color: var(--secondary); }
        .article-breadcrumb i { font-size: 0.7rem; }
        .article-category-badge {
            display: inline-block;
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 4px 16px;
            border-radius: 40px;
            margin-bottom: 18px;
        }
        .article-banner h1 {
            color: #fff;
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            max-width: 720px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.15);
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px 30px;
            margin-top: 22px;
            color: rgba(255,255,255,0.75);
            font-size: 0.95rem;
        }
        .article-meta i { margin-right: 6px; color: var(--secondary); }
        .article-meta span { display: inline-flex; align-items: center; }

        /* 正文区 */
        .article-main {
            padding: 48px 0 64px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 48px 52px;
            box-shadow: var(--shadow);
            line-height: 1.9;
            font-size: 1.05rem;
            color: var(--text);
        }
        .article-body h2,
        .article-body h3,
        .article-body h4 {
            margin-top: 2em;
            margin-bottom: 0.6em;
            color: var(--primary-dark);
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 1.4em;
            padding-left: 1.8em;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body a {
            color: var(--primary);
            border-bottom: 2px solid var(--secondary-light);
            font-weight: 500;
        }
        .article-body a:hover { border-bottom-color: var(--secondary); }
        .article-body blockquote {
            border-left: 5px solid var(--secondary);
            background: var(--bg-alt);
            padding: 16px 24px;
            margin: 1.5em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-weak);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 1.5em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: 6px;
            font-size: 0.9em;
            color: var(--accent);
        }
        .article-body pre {
            background: var(--primary-dark);
            color: #e4e7f0;
            padding: 24px 28px;
            border-radius: var(--radius);
            overflow-x: auto;
            margin: 1.5em 0;
            font-size: 0.9rem;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 36px;
            padding-top: 28px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            background: var(--bg-alt);
            color: var(--text-weak);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--secondary); color: var(--primary-dark); }

        /* 文章导航 */
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .article-nav a {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            font-weight: 500;
            color: var(--text-weak);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .article-nav a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }
        .article-nav .nav-prev i { margin-right: 4px; }
        .article-nav .nav-next i { margin-left: 4px; }

        /* 内容未找到 */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
            display: block;
        }
        .not-found-box h2 { color: var(--text-weak); margin-bottom: 12px; }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-box .btn { margin-top: 8px; }

        /* ===== CTA 区块 ===== */
        .section-cta {
            padding: 64px 0;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-light));
            position: relative;
            overflow: hidden;
        }
        .section-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .section-cta .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .section-cta h2 {
            color: #fff;
            font-size: 2.2rem;
            margin-bottom: 12px;
        }
        .section-cta p {
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .section-cta .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer-brand .header-logo { margin-bottom: 16px; }
        .footer-brand .header-logo span { -webkit-text-fill-color: #fff; background: none; color: #fff; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 340px; color: rgba(255,255,255,0.55); }
        .footer h4 {
            color: #fff;
            margin-bottom: 18px;
            font-size: 1.05rem;
            font-weight: 600;
        }
        .footer a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: color var(--transition);
        }
        .footer a:hover { color: var(--secondary); }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.35);
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .article-banner h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            .header-nav { display: none; }
            .header-actions .header-search { display: none; }
            .hamburger { display: flex; }
            .mobile-menu-open .header-nav {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--header-h);
                left: 0; right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(16px);
                padding: 20px 28px;
                gap: 12px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow);
            }
            .mobile-menu-open .header-nav a { width: 100%; padding: 12px 0; border-bottom: none; border-left: 3px solid transparent; padding-left: 12px; }
            .mobile-menu-open .header-nav a.active,
            .mobile-menu-open .header-nav a:hover { border-left-color: var(--secondary); }

            .article-banner { padding-top: calc(var(--header-h) + 36px); padding-bottom: 36px; }
            .article-banner h1 { font-size: 1.8rem; }
            .article-body { padding: 28px 20px; }
            .article-meta { gap: 12px 20px; font-size: 0.85rem; }

            .section-cta h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .container { padding: 0 18px; }
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .article-banner h1 { font-size: 1.5rem; }
            .article-body { padding: 20px 16px; font-size: 0.95rem; }
            .article-nav { flex-direction: column; }
            .article-nav a { width: 100%; justify-content: center; }
            .header-logo span { font-size: 1.2rem; }
            .header-logo i { font-size: 1.3rem; }
        }

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