/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2c5a8c;
            --primary-dark: #0f2440;
            --accent: #c0392b;
            --accent-light: #e74c3c;
            --accent-dark: #a93226;
            --bg: #f5f6fa;
            --bg-white: #ffffff;
            --bg-dark: #0f2440;
            --text: #2c3e50;
            --text-light: #7f8c8d;
            --text-white: #ffffff;
            --border: #e0e4e8;
            --border-light: #f0f2f5;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 6px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
            --shadow-xl: 0 24px 60px rgba(0,0,0,0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== 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: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        button, input, textarea, select { font-family: inherit; font-size: inherit; outline: none; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; color: var(--primary-dark); font-weight: 700; }
        .container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }

        /* ===== Utility ===== */
        .section { padding: var(--spacing-section) 0; }
        .section-title {
            font-size: 2.2rem;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-light);
            font-size: 1.1rem;
            max-width: 640px;
            margin: 0 auto var(--spacing-block);
            line-height: 1.6;
        }
        .divider { width: 60px; height: 4px; background: var(--accent); border-radius: 4px; margin: 16px auto 32px; }
        .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; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.2;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(192,57,43,0.35);
        }
        .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-light {
            background: rgba(255,255,255,0.15);
            color: #fff;
            border-color: rgba(255,255,255,0.3);
            backdrop-filter: blur(4px);
        }
        .btn-light:hover {
            background: rgba(255,255,255,0.25);
            color: #fff;
            border-color: rgba(255,255,255,0.5);
            transform: translateY(-2px);
        }
        .btn-sm { padding: 10px 20px; font-size: 0.9rem; }
        .btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }

        /* ===== Badge / Tag ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 20px;
            background: var(--primary);
            color: #fff;
            letter-spacing: 0.02em;
        }
        .badge-accent { background: var(--accent); }
        .badge-light { background: rgba(26,58,92,0.1); color: var(--primary); }
        .tag {
            display: inline-block;
            padding: 3px 12px;
            font-size: 0.78rem;
            border-radius: 4px;
            background: var(--bg);
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 1px 4px rgba(0,0,0,0.04);
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.02em;
            flex-shrink: 0;
        }
        .logo i { color: var(--accent); font-size: 1.5rem; }
        .logo:hover { color: var(--primary-dark); }
        .logo-icon { width: 36px; height: 36px; background: var(--accent); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.2rem; font-weight: 800; }

        /* Nav tabs */
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg);
            padding: 4px;
            border-radius: 12px;
            border: 1px solid var(--border);
        }
        .nav-tab {
            padding: 8px 20px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            border-radius: 8px;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-tab:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: var(--shadow-sm);
        }
        .nav-tab.active:hover { background: var(--primary-light); color: #fff; }

        /* Header actions */
        .header-actions { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
        .search-toggle {
            width: 40px; height: 40px;
            display: flex; align-items: center; justify-content: center;
            border-radius: 10px;
            color: var(--text-light);
            font-size: 1.1rem;
            transition: var(--transition);
            background: transparent;
        }
        .search-toggle:hover { background: var(--bg); color: var(--primary); }

        /* Mobile menu */
        .mobile-toggle {
            display: none;
            width: 40px; height: 40px;
            align-items: center; justify-content: center;
            border-radius: 10px;
            font-size: 1.4rem;
            color: var(--text);
            background: transparent;
        }
        .mobile-toggle:hover { background: var(--bg); }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 75vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: var(--primary-dark);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.92) 0%, rgba(26,58,92,0.7) 50%, rgba(192,57,43,0.25) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 820px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 30px;
            background: rgba(255,255,255,0.12);
            color: rgba(255,255,255,0.9);
            backdrop-filter: blur(4px);
            border: 1px solid rgba(255,255,255,0.15);
            margin-bottom: 24px;
            letter-spacing: 0.04em;
        }
        .hero h1 {
            font-size: 3.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.03em;
            line-height: 1.15;
            margin-bottom: 20px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.2);
        }
        .hero p {
            font-size: 1.2rem;
            color: rgba(255,255,255,0.8);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 56px;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.12);
        }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 2.2rem; font-weight: 800; color: #fff; display: block; line-height: 1.2; }
        .hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.6); margin-top: 4px; }

        /* ===== Features / 核心说明 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }
        .feature-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 40px 32px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .feature-icon {
            width: 64px; height: 64px;
            margin: 0 auto 20px;
            border-radius: 16px;
            background: rgba(26,58,92,0.08);
            display: flex; align-items: center; justify-content: center;
            font-size: 1.8rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon { background: var(--primary); color: #fff; }
        .feature-card h3 { font-size: 1.25rem; margin-bottom: 12px; }
        .feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }

        /* ===== Categories / 分类入口 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: var(--bg-white);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
            aspect-ratio: 4 / 3;
            display: flex;
            align-items: flex-end;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .category-card img {
            position: absolute;
            inset: 0;
            width: 100%; height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover img { transform: scale(1.06); }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(15,36,64,0.85) 0%, rgba(15,36,64,0.1) 60%);
            transition: var(--transition);
        }
        .category-card:hover .category-overlay { background: linear-gradient(to top, rgba(192,57,43,0.85) 0%, rgba(15,36,64,0.2) 60%); }
        .category-label {
            position: relative;
            z-index: 2;
            padding: 20px 24px;
            width: 100%;
        }
        .category-label h3 { color: #fff; font-size: 1.2rem; font-weight: 700; margin-bottom: 4px; }
        .category-label p { color: rgba(255,255,255,0.75); font-size: 0.85rem; }

        /* ===== Latest Posts / 资讯列表 ===== */
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .post-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .post-card-img {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg);
        }
        .post-card-img img {
            width: 100%; height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .post-card:hover .post-card-img img { transform: scale(1.05); }
        .post-card-cat {
            position: absolute;
            top: 14px; left: 14px;
            padding: 4px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 6px;
            background: var(--accent);
            color: #fff;
            box-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        .post-card-body { padding: 22px 24px 24px; flex: 1; display: flex; flex-direction: column; }
        .post-card-body h3 { font-size: 1.1rem; margin-bottom: 10px; line-height: 1.4; }
        .post-card-body h3 a { color: var(--primary-dark); }
        .post-card-body h3 a:hover { color: var(--accent); }
        .post-card-body p { color: var(--text-light); font-size: 0.92rem; line-height: 1.7; flex: 1; }
        .post-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
        }
        .post-card-meta i { margin-right: 4px; }

        .empty-posts {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            border: 1px dashed var(--border);
            color: var(--text-light);
            font-size: 1.05rem;
        }
        .empty-posts i { font-size: 2.4rem; color: var(--border); margin-bottom: 16px; display: block; }

        /* ===== 数据/流程 ===== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            padding: 36px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .stat-card i { font-size: 2.2rem; color: var(--accent); margin-bottom: 16px; display: block; }
        .stat-card .num { font-size: 2.6rem; font-weight: 800; color: var(--primary-dark); line-height: 1.2; }
        .stat-card .label { font-size: 0.9rem; color: var(--text-light); margin-top: 6px; }

        /* ===== 内容卡片区 ===== */
        .showcase-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .showcase-card {
            background: var(--bg-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .showcase-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
        .showcase-card-img {
            aspect-ratio: 4 / 3;
            overflow: hidden;
            background: var(--bg);
        }
        .showcase-card-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
        .showcase-card:hover .showcase-card-img img { transform: scale(1.06); }
        .showcase-card-body { padding: 24px 24px 28px; }
        .showcase-card-body .tag { margin-bottom: 12px; }
        .showcase-card-body h3 { font-size: 1.15rem; margin-bottom: 10px; }
        .showcase-card-body p { color: var(--text-light); font-size: 0.92rem; line-height: 1.7; }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary-dark);
            text-align: left;
            background: transparent;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--accent); }
        .faq-question i { font-size: 0.9rem; color: var(--text-light); transition: var(--transition); flex-shrink: 0; }
        .faq-item.active .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-light);
            line-height: 1.7;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,36,64,0.92) 0%, rgba(26,58,92,0.8) 100%);
        }
        .cta-content { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; }
        .cta-content h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.8); font-size: 1.1rem; margin-bottom: 32px; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255,255,255,0.7);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.6); max-width: 360px; }
        .footer-social { display: flex; gap: 12px; margin-top: 20px; }
        .footer-social a {
            width: 40px; height: 40px;
            border-radius: 10px;
            background: rgba(255,255,255,0.08);
            display: flex; align-items: center; justify-content: center;
            color: rgba(255,255,255,0.7);
            font-size: 1.1rem;
            transition: var(--transition);
            border: 1px solid rgba(255,255,255,0.05);
        }
        .footer-social a:hover { background: var(--accent); color: #fff; border-color: var(--accent); transform: translateY(-2px); }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 18px; font-weight: 600; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 6px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.6); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            :root { --spacing-section: 60px; --spacing-block: 36px; }
            .hero h1 { font-size: 2.8rem; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .categories-grid { grid-template-columns: repeat(2, 1fr); }
            .showcase-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }

        @media (max-width: 768px) {
            :root { --nav-height: 64px; --spacing-section: 48px; --spacing-block: 28px; }
            .mobile-toggle { display: flex; }
            .nav-tabs { display: none; }
            .nav-tabs.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 12px;
                right: 12px;
                background: var(--bg-white);
                border-radius: var(--radius-lg);
                box-shadow: var(--shadow-xl);
                padding: 8px;
                border: 1px solid var(--border);
                z-index: 999;
            }
            .nav-tabs.open .nav-tab { width: 100%; text-align: center; padding: 12px 20px; }
            .header-actions .btn { display: none; }
            .hero { min-height: 60vh; padding: 100px 20px 60px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero-stats { gap: 24px; }
            .hero-stat-num { font-size: 1.8rem; }
            .section-title { font-size: 1.7rem; }
            .features-grid { grid-template-columns: 1fr; }
            .categories-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .posts-grid { grid-template-columns: 1fr; }
            .stats-row { grid-template-columns: repeat(2, 1fr); }
            .showcase-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.7rem; }
            .hero-actions .btn { width: 100%; }
            .categories-grid { grid-template-columns: 1fr; }
            .stats-row { grid-template-columns: 1fr; }
            .cta-actions .btn { width: 100%; }
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 30px; height: 30px; font-size: 0.95rem; }
        }

        /* ===== Focus visible ===== */
        :focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 16px;
            padding: 12px 24px;
            background: var(--accent);
            color: #fff;
            border-radius: 8px;
            z-index: 10000;
            font-weight: 600;
        }
        .skip-link:focus { top: 16px; }

        /* ===== Animations ===== */
        @keyframes fadeUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
        .animate-fade-up { animation: fadeUp 0.6s ease forwards; }
        .delay-1 { animation-delay: 0.1s; }
        .delay-2 { animation-delay: 0.2s; }
        .delay-3 { animation-delay: 0.3s; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f1f33;
            --accent: #c0392b;
            --accent-light: #e74c3c;
            --accent-dark: #a93226;
            --bg: #f8f9fa;
            --bg-alt: #ffffff;
            --bg-warm: #fdf6f0;
            --text: #1a1a2e;
            --text-light: #555;
            --text-muted: #888;
            --border: #e0e0e0;
            --border-light: #f0f0f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Segoe UI', system-ui, -apple-system, 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: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 3px solid var(--accent-light); outline-offset: 2px; border-radius: 4px; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--primary-dark); }
        p { margin-bottom: 1rem; }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255,255,255,0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 2px 12px rgba(0,0,0,0.04);
            height: var(--header-h);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary-dark);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.3rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo span:last-child { background: linear-gradient(135deg, var(--primary-dark), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-tabs {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--bg);
            padding: 4px;
            border-radius: 40px;
            border: 1px solid var(--border-light);
        }
        .nav-tab {
            padding: 8px 22px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            white-space: nowrap;
            background: transparent;
            border: none;
            cursor: pointer;
        }
        .nav-tab:hover { color: var(--primary); background: rgba(26,58,92,0.06); }
        .nav-tab.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 12px rgba(26,58,92,0.25);
        }
        .nav-tab.active:hover { background: var(--primary-light); color: #fff; }
        .nav-cta {
            padding: 8px 24px;
            background: var(--accent);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .nav-cta:hover { background: var(--accent-dark); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(192,57,43,0.3); color: #fff; }
        .mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary-dark); cursor: pointer; padding: 4px 8px; }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            padding: 60px 0 40px;
            background: var(--bg-alt);
            border-bottom: 1px solid var(--border-light);
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.06;
            pointer-events: none;
        }
        .article-hero .container { position: relative; z-index: 1; }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a { color: var(--text-muted); }
        .article-breadcrumb a:hover { color: var(--primary); }
        .article-breadcrumb .sep { color: var(--border); }
        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            background: var(--accent);
            color: #fff;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }
        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--primary-dark);
            max-width: 900px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-meta i { margin-right: 6px; color: var(--primary-light); }
        .article-meta span { display: inline-flex; align-items: center; }

        /* ===== Article Body ===== */
        .article-body-section {
            padding: 50px 0 60px;
            background: var(--bg);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 48px;
            align-items: start;
        }
        .article-content {
            background: var(--bg-alt);
            padding: 40px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .article-content p {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
            margin-bottom: 1.4rem;
        }
        .article-content h2 {
            font-size: 1.6rem;
            margin: 2rem 0 1rem;
            color: var(--primary-dark);
        }
        .article-content h3 {
            font-size: 1.25rem;
            margin: 1.6rem 0 0.8rem;
            color: var(--primary);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.5rem 0;
            background: var(--bg-warm);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-light);
        }
        .article-content ul, .article-content ol {
            margin: 1rem 0;
            padding-left: 1.5rem;
        }
        .article-content ul li { list-style: disc; margin-bottom: 0.5rem; }
        .article-content ol li { list-style: decimal; margin-bottom: 0.5rem; }
        .article-content img {
            border-radius: var(--radius-sm);
            margin: 1.5rem auto;
            box-shadow: var(--shadow);
            max-width: 100%;
        }
        .article-content a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
        .article-content a:hover { color: var(--accent-dark); }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-light);
        }
        .article-tag {
            padding: 4px 16px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 0.8rem;
            color: var(--text-light);
            transition: all var(--transition);
        }
        .article-tag:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-alt);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--primary);
            color: var(--primary-dark);
        }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            font-size: 0.95rem;
            color: var(--text);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            transition: all var(--transition);
        }
        .sidebar-list a:hover { color: var(--accent); transform: translateX(4px); }
        .sidebar-list a i { color: var(--accent); font-size: 0.75rem; margin-top: 5px; flex-shrink: 0; }
        .sidebar-cta {
            display: block;
            text-align: center;
            padding: 12px 20px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all var(--transition);
            margin-top: 8px;
        }
        .sidebar-cta:hover { background: var(--primary-light); color: #fff; transform: translateY(-2px); box-shadow: var(--shadow-md); }

        /* ===== Related / Recommendation ===== */
        .related-section {
            padding: 50px 0 60px;
            background: var(--bg-alt);
            border-top: 1px solid var(--border-light);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            text-align: center;
            margin-bottom: 36px;
            color: var(--primary-dark);
            position: relative;
        }
        .related-section .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: var(--accent);
            margin: 12px auto 0;
            border-radius: 4px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }
        .related-card {
            background: var(--bg);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
        }
        .related-card-body {
            padding: 18px 20px 22px;
        }
        .related-card-body .cat-tag {
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card-body h4 {
            font-size: 1.05rem;
            margin: 6px 0 8px;
            color: var(--primary-dark);
        }
        .related-card-body h4 a { color: var(--primary-dark); }
        .related-card-body h4 a:hover { color: var(--accent); }
        .related-card-body p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
            background: var(--bg-alt);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
        .not-found-box h2 { font-size: 1.8rem; margin-bottom: 12px; color: var(--primary-dark); }
        .not-found-box p { color: var(--text-light); margin-bottom: 24px; }
        .not-found-box .btn-home {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 30px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-box .btn-home:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 30px;
        }
        .site-footer .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo span:last-child { -webkit-text-fill-color: #fff; background: none; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.65); margin-bottom: 18px; max-width: 360px; }
        .footer-social { display: flex; gap: 12px; }
        .footer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: rgba(255,255,255,0.1);
            border-radius: 50%;
            color: rgba(255,255,255,0.8);
            font-size: 1.1rem;
            transition: all var(--transition);
        }
        .footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px; background: var(--accent); border-radius: 2px; }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 5px 0;
            transition: all var(--transition);
        }
        .footer-col a:hover { color: #fff; padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a { color: rgba(255,255,255,0.7); }
        .footer-bottom a:hover { color: #fff; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-title { font-size: 1.8rem; }
            .article-layout { grid-template-columns: 1fr; }
            .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .header-inner { padding: 0 16px; }
            .nav-tabs { display: none; }
            .nav-tabs.open { display: flex; flex-direction: column; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--bg-alt); border-bottom: 1px solid var(--border); padding: 12px 16px; border-radius: 0; box-shadow: var(--shadow-md); gap: 6px; }
            .nav-tab { width: 100%; text-align: center; padding: 10px 0; }
            .nav-cta { display: none; }
            .mobile-toggle { display: block; }
            .article-hero { padding: 40px 0 28px; }
            .article-title { font-size: 1.5rem; }
            .article-content { padding: 24px 20px; }
            .article-layout { gap: 28px; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .article-title { font-size: 1.25rem; }
            .article-content p { font-size: 0.98rem; }
            .related-grid { grid-template-columns: 1fr; }
            .article-meta { gap: 10px; font-size: 0.82rem; }
            .logo { font-size: 1.2rem; }
            .logo-icon { width: 34px; height: 34px; font-size: 1.1rem; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --clr-primary: #1a3a5c;
            --clr-primary-light: #2a5a8c;
            --clr-primary-dark: #0f2440;
            --clr-accent: #d4a030;
            --clr-accent-light: #e8bc5a;
            --clr-accent-dark: #b8891e;
            --clr-emphasis: #c0392b;
            --clr-bg: #f0f2f5;
            --clr-bg-alt: #e8ecf2;
            --clr-card: #ffffff;
            --clr-text: #1a1a2e;
            --clr-text-secondary: #5a6a7a;
            --clr-text-light: #8a9aaa;
            --clr-border: #e0e4e8;
            --clr-border-light: #eef0f3;
            --clr-overlay: rgba(15, 36, 64, 0.75);
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.05);
            --shadow-md: 0 6px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.16);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

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

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

        a:focus-visible {
            outline: 3px solid var(--clr-accent);
            outline-offset: 2px;
        }

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            transition: var(--transition);
        }

        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--clr-accent);
            outline-offset: 2px;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
        }

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

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

        /* ===== 通用板块间距 ===== */
        .section {
            padding: 72px 0;
        }

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

        .section-header h2 {
            font-size: 2rem;
            color: var(--clr-primary);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

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

        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--clr-accent);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .section-header p {
                font-size: 0.95rem;
            }
        }

        /* ===== Header / 导航 (分段标签导航) ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--clr-border-light);
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--clr-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--clr-primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-size: 1.2rem;
            font-weight: 700;
            flex-shrink: 0;
        }

        .nav-tabs {
            display: flex;
            gap: 4px;
            background: var(--clr-bg-alt);
            padding: 4px;
            border-radius: var(--radius-md);
        }

        .nav-tab {
            padding: 8px 22px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--clr-text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            white-space: nowrap;
            position: relative;
        }

        .nav-tab:hover {
            color: var(--clr-primary);
            background: rgba(255, 255, 255, 0.6);
        }

        .nav-tab.active {
            background: var(--clr-card);
            color: var(--clr-primary);
            box-shadow: var(--shadow-sm);
            font-weight: 600;
        }

        .nav-tab.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--clr-accent);
            border-radius: 4px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-cta .btn-primary {
            padding: 8px 20px;
            font-size: 0.9rem;
        }

        .mobile-toggle {
            display: none;
            background: none;
            font-size: 1.5rem;
            color: var(--clr-primary);
            cursor: pointer;
            padding: 8px;
        }

        @media (max-width: 768px) {
            .nav-tabs {
                display: none;
                flex-direction: column;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--clr-card);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                box-shadow: var(--shadow-lg);
                padding: 12px;
                gap: 6px;
                border-top: 1px solid var(--clr-border-light);
            }
            .nav-tabs.open {
                display: flex;
            }
            .nav-tab {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
            }
            .nav-tab.active::after {
                display: none;
            }
            .nav-tab.active {
                background: var(--clr-bg-alt);
            }
            .mobile-toggle {
                display: block;
            }
            .header-cta .btn-primary {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .logo {
                font-size: 1.1rem;
                gap: 8px;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }
        }

        /* ===== 按钮 ===== */
        .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-md);
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            line-height: 1.4;
        }

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

        .btn-primary:hover {
            background: var(--clr-primary-light);
            border-color: var(--clr-primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: var(--shadow-sm);
        }

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

        .btn-accent:hover {
            background: var(--clr-accent-light);
            border-color: var(--clr-accent-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

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

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

        .btn-outline:hover {
            background: var(--clr-primary);
            color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-lg {
            padding: 16px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-lg);
        }

        .btn-sm {
            padding: 6px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        .btn .fa-arrow-right {
            font-size: 0.85em;
            transition: var(--transition);
        }

        .btn:hover .fa-arrow-right {
            transform: translateX(4px);
        }

        /* ===== 标签 / 徽章 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.78rem;
            font-weight: 500;
            border-radius: 20px;
            background: var(--clr-bg-alt);
            color: var(--clr-text-secondary);
            letter-spacing: 0.02em;
        }

        .tag-primary {
            background: rgba(26, 58, 92, 0.12);
            color: var(--clr-primary);
        }

        .tag-accent {
            background: rgba(212, 160, 48, 0.18);
            color: var(--clr-accent-dark);
        }

        .tag-emphasis {
            background: rgba(192, 57, 43, 0.12);
            color: var(--clr-emphasis);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 12px;
            background: var(--clr-accent);
            color: var(--clr-primary-dark);
        }

        /* ===== Hero / Banner ===== */
        .banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--clr-primary-dark);
            overflow: hidden;
        }

        .banner-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            opacity: 0.55;
        }

        .banner-overlay {
            position: absolute;
            inset: 0;
            background: var(--clr-overlay);
            z-index: 1;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 780px;
            padding: 60px 24px;
        }

        .banner-content .tag {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            margin-bottom: 16px;
        }

        .banner-content h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.3);
        }

        .banner-content p {
            font-size: 1.15rem;
            opacity: 0.9;
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

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

        @media (max-width: 768px) {
            .banner {
                min-height: 320px;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .banner-content p {
                font-size: 1rem;
            }
            .banner-content {
                padding: 40px 16px;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.6rem;
            }
        }

        /* ===== 频道介绍 ===== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .intro-text h2 {
            font-size: 1.8rem;
            color: var(--clr-primary);
            margin-bottom: 16px;
        }

        .intro-text p {
            color: var(--clr-text-secondary);
            margin-bottom: 16px;
            font-size: 1rem;
            line-height: 1.8;
        }

        .intro-text .features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 20px;
        }

        .intro-text .features li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--clr-text);
            padding: 8px 12px;
            background: var(--clr-bg);
            border-radius: var(--radius-sm);
        }

        .intro-text .features li i {
            color: var(--clr-accent);
            font-size: 1.1rem;
        }

        .intro-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            height: 360px;
            background: var(--clr-bg-alt);
        }

        .intro-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        @media (max-width: 768px) {
            .intro-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .intro-text h2 {
                font-size: 1.5rem;
            }
            .intro-text .features {
                grid-template-columns: 1fr;
            }
            .intro-image {
                height: 240px;
                order: -1;
            }
        }

        /* ===== 新闻卡片网格 ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .news-card {
            background: var(--clr-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .news-card-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }

        .news-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .news-card:hover .news-card-image img {
            transform: scale(1.05);
        }

        .news-card-image .tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--clr-primary);
        }

        .news-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-body .meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--clr-text-light);
            margin-bottom: 10px;
        }

        .news-card-body .meta i {
            margin-right: 4px;
        }

        .news-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--clr-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .news-card-body p {
            font-size: 0.92rem;
            color: var(--clr-text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 12px;
        }

        .news-card-body .card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 12px;
            border-top: 1px solid var(--clr-border-light);
        }

        .news-card-body .card-footer .read-more {
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--clr-primary-light);
        }

        .news-card-body .card-footer .read-more i {
            margin-left: 4px;
            transition: var(--transition);
        }

        .news-card-body .card-footer .read-more:hover i {
            transform: translateX(4px);
        }

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

        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-card-image {
                height: 180px;
            }
        }

        /* ===== 深度专题 (大图+文字) ===== */
        .featured-section {
            background: var(--clr-primary);
            color: #fff;
        }

        .featured-grid {
            display: grid;
            grid-template-columns: 1.1fr 0.9fr;
            gap: 48px;
            align-items: center;
        }

        .featured-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-xl);
            height: 380px;
        }

        .featured-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .featured-content .tag {
            background: rgba(255, 255, 255, 0.18);
            color: #fff;
            margin-bottom: 12px;
        }

        .featured-content h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .featured-content p {
            font-size: 1rem;
            opacity: 0.85;
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .featured-content .btn-outline {
            border-color: #fff;
            color: #fff;
        }

        .featured-content .btn-outline:hover {
            background: #fff;
            color: var(--clr-primary);
        }

        @media (max-width: 768px) {
            .featured-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .featured-image {
                height: 260px;
                order: -1;
            }
            .featured-content h2 {
                font-size: 1.5rem;
            }
        }

        /* ===== 全球数据 (统计数字) ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--clr-card);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--clr-border-light);
        }

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

        .stat-card .stat-icon {
            font-size: 2.2rem;
            color: var(--clr-accent);
            margin-bottom: 12px;
        }

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

        .stat-card .stat-label {
            font-size: 0.92rem;
            color: var(--clr-text-secondary);
        }

        @media (max-width: 768px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stat-card {
                padding: 24px 16px;
            }
            .stat-card .stat-number {
                font-size: 1.5rem;
            }
        }

        /* ===== 专家观点 (对比卡片) ===== */
        .compare-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .compare-card {
            background: var(--clr-card);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--clr-border-light);
            transition: var(--transition);
            position: relative;
        }

        .compare-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .compare-card .compare-tag {
            display: inline-block;
            padding: 4px 16px;
            font-size: 0.78rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 14px;
        }

        .compare-card .compare-tag.left {
            background: rgba(26, 58, 92, 0.12);
            color: var(--clr-primary);
        }

        .compare-card .compare-tag.right {
            background: rgba(212, 160, 48, 0.18);
            color: var(--clr-accent-dark);
        }

        .compare-card h4 {
            font-size: 1.1rem;
            color: var(--clr-primary);
            margin-bottom: 8px;
        }

        .compare-card .expert-name {
            font-size: 0.88rem;
            color: var(--clr-text-light);
            margin-bottom: 12px;
            display: block;
        }

        .compare-card p {
            font-size: 0.95rem;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        .compare-card .rating {
            display: flex;
            gap: 4px;
            margin-top: 12px;
            color: var(--clr-accent);
            font-size: 0.9rem;
        }

        @media (max-width: 768px) {
            .compare-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .compare-card {
                padding: 24px 20px;
            }
        }

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

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

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

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--clr-primary);
            cursor: pointer;
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }

        .faq-question i {
            font-size: 1.1rem;
            color: var(--clr-accent);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        .faq-answer p {
            font-size: 0.95rem;
            color: var(--clr-text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--clr-primary);
            color: #fff;
            text-align: center;
            padding: 72px 24px;
        }

        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }

        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.85;
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-section .cta-form {
            display: flex;
            gap: 12px;
            justify-content: center;
            flex-wrap: wrap;
            max-width: 500px;
            margin: 0 auto;
        }

        .cta-section .cta-form input[type="email"] {
            flex: 1;
            min-width: 200px;
            padding: 14px 20px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            background: rgba(255, 255, 255, 0.15);
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .cta-section .cta-form input[type="email"]::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .cta-section .cta-form input[type="email"]:focus {
            background: rgba(255, 255, 255, 0.22);
            border-color: var(--clr-accent);
        }

        .cta-section .cta-form .btn-accent {
            padding: 14px 32px;
            font-size: 1rem;
        }

        @media (max-width: 520px) {
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .cta-section .cta-form {
                flex-direction: column;
            }
            .cta-section .cta-form input[type="email"] {
                min-width: auto;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--clr-primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-brand .logo .logo-icon {
            background: var(--clr-accent);
            color: var(--clr-primary-dark);
        }
        .footer-brand p {
            font-size: 0.92rem;
            opacity: 0.7;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .footer-social {
            display: flex;
            gap: 10px;
        }

        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            font-size: 1rem;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--clr-accent);
            color: var(--clr-primary-dark);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.65);
            padding: 6px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--clr-accent);
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-bottom a:hover {
            color: var(--clr-accent);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-12 {
            margin-top: 12px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-12 {
            margin-bottom: 12px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            border: 0;
        }

        /* ===== 页面内部导航锚点平滑 ===== */
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }