/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #0f0e3a;
            --primary-light: #1a1a5e;
            --primary-dark: #080720;
            --accent: #f5c542;
            --accent-hover: #e0b030;
            --accent-glow: rgba(245, 197, 66, 0.25);
            --bg: #ffffff;
            --bg-alt: #f4f5f9;
            --bg-card: #ffffff;
            --bg-dark: #0b0e2a;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-on-dark: #f1f3f7;
            --text-muted: #9ca3af;
            --border: #e9ecef;
            --border-light: rgba(255, 255, 255, 0.12);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.10);
            --shadow-glow: 0 0 40px rgba(245, 197, 66, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --container: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: inherit; text-decoration: none; transition: color var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
        button { cursor: pointer; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
        h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
        h3 { font-size: clamp(1.15rem, 2vw, 1.5rem); }
        p { margin-bottom: 0.5rem; }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow { max-width: 880px; }

        /* ===== 通用组件 ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-alt); }
        .section-dark { background: var(--bg-dark); color: var(--text-on-dark); }
        .section-dark h2, .section-dark h3, .section-dark .section-subtitle { color: var(--text-on-dark); }
        .section-title { text-align: center; margin-bottom: 12px; }
        .section-subtitle { text-align: center; color: var(--text-light); font-size: 1.05rem; max-width: 640px; margin: 0 auto 48px; }
        .section-dark .section-subtitle { color: rgba(255,255,255,0.65); }
        .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--accent);
            color: var(--primary-dark);
            margin-bottom: 16px;
        }
        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--accent);
            color: var(--accent);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition);
            border: 2px solid transparent;
            letter-spacing: 0.01em;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-on-dark);
            border-color: rgba(255,255,255,0.4);
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: translateY(-2px);
        }
        .btn-outline-dark {
            background: transparent;
            color: var(--primary);
            border-color: var(--border);
        }
        .btn-outline-dark:hover {
            border-color: var(--primary);
            background: var(--primary);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; }
        .card-body { padding: 24px; }
        .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(15, 14, 58, 0.08);
            color: var(--primary-light);
            margin-bottom: 10px;
        }
        .card-title { font-size: 1.1rem; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
        .card-text { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; gap: 16px; margin-top: 16px; font-size: 0.8rem; color: var(--text-muted); }
        .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .gap-16 { gap: 16px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-48 { margin-top: 48px; }
        .text-center { text-align: center; }
        .text-accent { color: var(--accent); }

        /* ===== 导航 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(11, 14, 42, 0.88);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255,255,255,0.06);
            transition: background var(--transition);
        }
        .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: #fff;
            letter-spacing: -0.02em;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--accent);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-dark);
            font-size: 1.1rem;
        }
        .logo span { background: linear-gradient(135deg, #fff 40%, var(--accent) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .nav-list { display: flex; align-items: center; gap: 6px; }
        .nav-list a {
            display: block;
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255,255,255,0.7);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-list a.active { color: #fff; background: rgba(245,197,66,0.18); color: var(--accent); }
        .nav-cta .btn { padding: 8px 24px; font-size: 0.85rem; }
        .mobile-toggle { display: none; flex-direction: column; gap: 5px; padding: 4px; cursor: pointer; background: none; border: none; }
        .mobile-toggle span { display: block; width: 26px; height: 2.5px; background: #fff; border-radius: 4px; transition: all var(--transition); }

        @media (max-width: 768px) {
            .nav-list { display: none; }
            .nav-cta { display: none; }
            .mobile-toggle { display: flex; }
            .site-header.mobile-open .nav-list {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(11, 14, 42, 0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px 24px;
                border-bottom: 1px solid rgba(255,255,255,0.06);
                gap: 4px;
            }
            .site-header.mobile-open .nav-list a { padding: 12px 18px; width: 100%; }
            .site-header.mobile-open .nav-cta { display: flex; padding: 8px 24px 24px; position: absolute; top: calc(var(--nav-height) + 220px); left: 0; right: 0; }
            .site-header.mobile-open .nav-cta .btn { width: 100%; justify-content: center; }
        }
        @media (max-width: 520px) {
            .header-inner { padding: 0 16px; }
            .logo { font-size: 1.1rem; }
            .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.45;
            mix-blend-mode: overlay;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(11,14,42,0.3) 0%, rgba(11,14,42,0.85) 100%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 820px; }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(245,197,66,0.15);
            color: var(--accent);
            border: 1px solid rgba(245,197,66,0.25);
            margin-bottom: 24px;
            letter-spacing: 0.04em;
        }
        .hero h1 { color: #fff; font-weight: 800; line-height: 1.15; margin-bottom: 20px; }
        .hero h1 .highlight { background: linear-gradient(135deg, var(--accent), #ffd700); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p {
            color: rgba(255,255,255,0.65);
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 48px;
            margin-top: 56px;
            flex-wrap: wrap;
        }
        .hero-stat { text-align: center; }
        .hero-stat-num { font-size: 2rem; font-weight: 800; color: var(--accent); }
        .hero-stat-label { font-size: 0.8rem; color: rgba(255,255,255,0.5); margin-top: 2px; }

        @media (max-width: 768px) {
            .hero { padding: 100px 16px 60px; min-height: 90vh; }
            .hero-stats { gap: 28px; margin-top: 40px; }
            .hero-stat-num { font-size: 1.6rem; }
        }
        @media (max-width: 520px) {
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.95rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; max-width: 280px; justify-content: center; }
        }

        /* ===== 核心特色 ===== */
        .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 32px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
            text-align: center;
        }
        .feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(245,197,66,0.12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            margin: 0 auto 20px;
        }
        .feature-card h3 { font-size: 1.15rem; margin-bottom: 10px; }
        .feature-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.7; }

        @media (max-width: 768px) { .features-grid { grid-template-columns: 1fr; gap: 20px; } .feature-card { padding: 28px 20px; } }
        @media (max-width: 520px) { .feature-card { padding: 24px 16px; } }

        /* ===== 分类入口 ===== */
        .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
        .category-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: flex-end;
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .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: transform 0.6s ease; }
        .category-card:hover img { transform: scale(1.05); }
        .category-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(11,14,42,0.85) 0%, rgba(11,14,42,0.1) 70%, transparent 100%);
        }
        .category-info { position: relative; z-index: 2; padding: 32px 28px; width: 100%; }
        .category-info h3 { color: #fff; font-size: 1.3rem; font-weight: 700; margin-bottom: 6px; }
        .category-info p { color: rgba(255,255,255,0.7); font-size: 0.85rem; }
        .category-info .btn { margin-top: 16px; }

        @media (max-width: 768px) { .category-grid { grid-template-columns: 1fr; } .category-card { min-height: 220px; } }
        @media (max-width: 520px) { .category-card { min-height: 180px; } .category-info { padding: 20px 16px; } }

        /* ===== 最新资讯列表 ===== */
        .post-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
        .post-card {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: rgba(245,197,66,0.3); }
        .post-thumb {
            flex-shrink: 0;
            width: 120px;
            height: 90px;
            border-radius: var(--radius-xs);
            overflow: hidden;
            background: var(--bg-alt);
        }
        .post-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .post-info { flex: 1; min-width: 0; }
        .post-info .card-tag { margin-bottom: 6px; }
        .post-info .card-title { font-size: 1rem; margin-bottom: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-info .card-text { font-size: 0.8rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .post-info .card-meta { margin-top: 8px; font-size: 0.75rem; }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 24px;
            color: var(--text-light);
            background: var(--bg-alt);
            border-radius: var(--radius);
            font-size: 0.95rem;
        }

        @media (max-width: 768px) { .post-list { grid-template-columns: 1fr; } .post-thumb { width: 90px; height: 68px; } .post-card { padding: 14px; gap: 14px; } }
        @media (max-width: 520px) { .post-card { flex-direction: column; } .post-thumb { width: 100%; height: 160px; } }

        /* ===== 数据统计 ===== */
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
        .stat-card {
            text-align: center;
            padding: 36px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.06);
            transition: all var(--transition);
        }
        .stat-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(245,197,66,0.2); }
        .stat-card .stat-icon { font-size: 2rem; color: var(--accent); margin-bottom: 12px; }
        .stat-card .stat-num { font-size: 2.2rem; font-weight: 800; color: #fff; }
        .stat-card .stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.55); margin-top: 4px; }

        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; } .stat-card { padding: 24px 12px; } .stat-card .stat-num { font-size: 1.6rem; } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr 1fr; } }

        /* ===== 使用流程 ===== */
        .steps-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; position: relative; }
        .step-card { text-align: center; position: relative; }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            position: relative;
            z-index: 2;
        }
        .step-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .step-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; max-width: 300px; margin: 0 auto; }
        .step-line { display: none; }

        @media (min-width: 769px) {
            .steps-grid { position: relative; }
            .step-line {
                display: block;
                position: absolute;
                top: 28px;
                left: 20%;
                right: 20%;
                height: 2px;
                background: linear-gradient(to right, var(--accent), rgba(245,197,66,0.2));
                z-index: 0;
            }
        }
        @media (max-width: 768px) { .steps-grid { grid-template-columns: 1fr; gap: 28px; } }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: rgba(245,197,66,0.25); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            gap: 16px;
            color: var(--text);
            transition: background var(--transition);
        }
        .faq-question:hover { background: rgba(245,197,66,0.04); }
        .faq-question i { color: var(--text-light); transition: transform var(--transition); font-size: 0.85rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        @media (max-width: 520px) { .faq-question { padding: 14px 16px; font-size: 0.88rem; } .faq-answer { padding: 0 16px 14px; } }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            padding: 80px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }
        .cta-content { position: relative; z-index: 2; max-width: 680px; margin: 0 auto; }
        .cta-content h2 { color: #fff; margin-bottom: 16px; }
        .cta-content p { color: rgba(255,255,255,0.6); font-size: 1.05rem; margin-bottom: 32px; }
        .cta-actions { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

        @media (max-width: 520px) { .cta-section { padding: 56px 16px; } .cta-actions { flex-direction: column; align-items: center; } .cta-actions .btn { width: 100%; max-width: 280px; justify-content: center; } }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.6);
            padding: 48px 24px 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-inner { max-width: var(--container); margin: 0 auto; }
        .footer-top { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(255,255,255,0.06); }
        .footer-brand .logo { margin-bottom: 12px; }
        .footer-brand p { font-size: 0.85rem; line-height: 1.7; max-width: 320px; color: rgba(255,255,255,0.45); }
        .footer-social { display: flex; gap: 12px; margin-top: 16px; }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255,255,255,0.5);
            transition: all var(--transition);
            font-size: 0.9rem;
        }
        .footer-social a:hover { background: var(--accent); color: var(--primary-dark); }
        .footer-col h4 { color: #fff; font-size: 0.9rem; font-weight: 700; margin-bottom: 16px; }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a { color: rgba(255,255,255,0.5); font-size: 0.85rem; transition: color var(--transition); }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; padding-top: 24px; font-size: 0.8rem; color: rgba(255,255,255,0.35); }

        @media (max-width: 768px) { .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; } .footer-brand { grid-column: 1 / -1; } }
        @media (max-width: 520px) { .footer-top { grid-template-columns: 1fr; gap: 24px; } .footer-bottom { flex-direction: column; text-align: center; } }

        /* ===== 滚动动画 ===== */
        .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
        .fade-up.visible { opacity: 1; transform: translateY(0); }

        /* ===== 响应式补丁 ===== */
        @media (max-width: 1024px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 768px) {
            .grid-2 { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .section { padding: 48px 0; }
            .section-subtitle { margin-bottom: 32px; font-size: 0.95rem; }
        }
        @media (max-width: 520px) {
            .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
            .container { padding: 0 16px; }
            .section { padding: 36px 0; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a2a4a;
            --primary-light: #2c4a7a;
            --primary-dark: #0f1a30;
            --secondary: #e8b84b;
            --secondary-light: #f0d080;
            --secondary-dark: #c99a2e;
            --accent: #4a8bc2;
            --accent-light: #6aabe2;
            --bg-body: #f8f6f2;
            --bg-card: #ffffff;
            --bg-dark: #1a2a4a;
            --bg-soft: #f0ece6;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #f8f4ee;
            --text-muted: #9a9aba;
            --border-color: #e4e0da;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(26, 42, 74, 0.06);
            --shadow-md: 0 8px 30px rgba(26, 42, 74, 0.10);
            --shadow-lg: 0 20px 60px rgba(26, 42, 74, 0.14);
            --shadow-hover: 0 16px 48px rgba(26, 42, 74, 0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Noto Sans SC', 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-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 3px solid var(--secondary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }

        ul {
            list-style: none;
        }

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

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: var(--shadow-md);
            background: rgba(255, 255, 255, 0.97);
        }

        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary-dark);
        }
        .logo:hover {
            color: var(--primary-dark);
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: var(--secondary);
            border-radius: 50%;
            color: var(--primary-dark);
            font-size: 18px;
            transition: var(--transition);
        }
        .logo:hover .logo-icon {
            transform: rotate(20deg) scale(1.05);
        }
        .logo span:last-child {
            letter-spacing: 1px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26, 42, 74, 0.06);
        }
        .nav-list a.active {
            color: var(--primary-dark);
            background: rgba(232, 184, 75, 0.20);
            font-weight: 600;
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary);
            color: var(--text-white) !important;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 14px;
            transition: var(--transition);
        }
        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-1px);
            box-shadow: var(--shadow-sm);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 4px;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            margin-top: var(--header-h);
            padding: 80px 0 70px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(232, 184, 75, 0.20);
            border: 1px solid rgba(232, 184, 75, 0.30);
            padding: 6px 18px;
            border-radius: 40px;
            font-size: 13px;
            color: var(--secondary);
            letter-spacing: 0.5px;
            margin-bottom: 20px;
        }
        .category-hero h1 {
            font-size: 48px;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: -0.5px;
        }
        .category-hero h1 i {
            color: var(--secondary);
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(248, 244, 238, 0.80);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 32px;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }
        .hero-stats .stat-label {
            font-size: 14px;
            color: rgba(248, 244, 238, 0.70);
            letter-spacing: 0.5px;
        }

        /* ===== Section Common ===== */
        .section-block {
            padding: 72px 0;
        }
        .section-block.alt-bg {
            background: var(--bg-soft);
        }
        .section-block.dark-bg {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-title {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-primary);
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title.light {
            color: var(--text-white);
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            text-align: center;
            max-width: 600px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }
        .section-subtitle.light {
            color: rgba(248, 244, 238, 0.75);
        }
        .section-divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 0 auto 48px;
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 24px 22px 26px;
        }
        .card-body .tag {
            display: inline-block;
            padding: 4px 14px;
            background: rgba(232, 184, 75, 0.15);
            color: var(--secondary-dark);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 12px;
        }
        .card-body h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .card-body p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: var(--primary-light);
            font-size: 14px;
        }
        .card-body .card-link i {
            transition: var(--transition);
            font-size: 12px;
        }
        .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        .card.icon-card {
            text-align: center;
            padding: 40px 24px 36px;
        }
        .card.icon-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 18px;
            background: rgba(232, 184, 75, 0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--secondary-dark);
            transition: var(--transition);
        }
        .card.icon-card:hover .icon-wrap {
            background: var(--secondary);
            color: var(--primary-dark);
            transform: scale(1.05);
        }
        .card.icon-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
        }
        .card.icon-card p {
            font-size: 14px;
            color: var(--text-light);
        }

        /* ===== Featured / Large Card ===== */
        .featured-split {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .featured-split.reverse {
            direction: rtl;
        }
        .featured-split.reverse>* {
            direction: ltr;
        }
        .featured-split .split-img {
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-md);
            width: 100%;
            height: 340px;
            object-fit: cover;
        }
        .featured-split .split-content h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
            line-height: 1.3;
        }
        .featured-split .split-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .featured-split .split-content .split-tag {
            display: inline-block;
            padding: 4px 16px;
            background: rgba(232, 184, 75, 0.15);
            color: var(--secondary-dark);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
        }

        /* ===== List / Timeline ===== */
        .timeline-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .timeline-item {
            display: flex;
            gap: 20px;
            background: var(--bg-card);
            padding: 20px 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .timeline-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--secondary);
        }
        .timeline-item .step-num {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
        }
        .timeline-item .step-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .timeline-item .step-content p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Equipment Grid ===== */
        .equip-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 24px;
        }
        .equip-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 28px 22px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            text-align: center;
        }
        .equip-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .equip-card .equip-icon {
            font-size: 36px;
            color: var(--secondary-dark);
            margin-bottom: 14px;
        }
        .equip-card h4 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .equip-card .equip-desc {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .equip-card .equip-tag {
            display: inline-block;
            padding: 2px 14px;
            background: rgba(74, 139, 194, 0.12);
            color: var(--accent);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--secondary);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            font-family: var(--font-sans);
            transition: var(--transition);
        }
        .faq-question i {
            font-size: 14px;
            color: var(--text-light);
            transition: var(--transition);
        }
        .faq-question.open i {
            transform: rotate(180deg);
            color: var(--secondary);
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            padding: 64px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.10;
            mix-blend-mode: overlay;
        }
        .cta-block .container {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 14px;
        }
        .cta-block p {
            font-size: 17px;
            color: rgba(248, 244, 238, 0.80);
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 16px;
            font-family: var(--font-sans);
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
            color: var(--primary-dark);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 2px solid rgba(248, 244, 238, 0.40);
        }
        .btn-outline:hover {
            background: rgba(248, 244, 238, 0.10);
            border-color: var(--text-white);
            transform: translateY(-2px);
            color: var(--text-white);
        }
        .btn-sm {
            padding: 10px 20px;
            font-size: 14px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(248, 244, 238, 0.80);
            padding: 60px 0 30px;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
            color: var(--text-white);
        }
        .footer-brand .logo:hover {
            color: var(--text-white);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: rgba(248, 244, 238, 0.65);
            margin-bottom: 18px;
            max-width: 340px;
        }
        .footer-social {
            display: flex;
            gap: 14px;
        }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(248, 244, 238, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(248, 244, 238, 0.70);
            font-size: 18px;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--secondary);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul a {
            font-size: 14px;
            color: rgba(248, 244, 238, 0.60);
            transition: var(--transition);
        }
        .footer-col ul a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(248, 244, 238, 0.10);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 12px;
            font-size: 13px;
            color: rgba(248, 244, 238, 0.50);
        }

        /* ===== Mobile Nav ===== */
        @media (max-width: 768px) {
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(16px);
                -webkit-backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px 28px;
                gap: 6px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-list a {
                padding: 12px 18px;
                font-size: 16px;
                width: 100%;
                text-align: center;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(232, 184, 75, 0.20);
                border-radius: var(--radius-sm);
            }
            .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }

            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero p {
                font-size: 16px;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 26px;
            }
            .section-title {
                font-size: 26px;
            }
            .section-block {
                padding: 48px 0;
            }
            .featured-split {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .featured-split.reverse {
                direction: ltr;
            }
            .featured-split .split-img {
                height: 220px;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 30px;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
            }
            .equip-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header-inner {
                padding: 0 16px;
            }
            .category-hero {
                padding: 60px 0 50px;
                min-height: 300px;
            }
            .category-hero h1 {
                font-size: 26px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .hero-stats .stat-number {
                font-size: 22px;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
                margin-bottom: 32px;
            }
            .card-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .equip-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .featured-split .split-content h2 {
                font-size: 22px;
            }
            .timeline-item {
                flex-direction: column;
                padding: 16px;
            }
            .timeline-item .step-num {
                width: 34px;
                height: 34px;
                font-size: 15px;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-block h2 {
                font-size: 24px;
            }
            .btn {
                padding: 12px 22px;
                font-size: 14px;
            }
            .nav-list a {
                font-size: 15px;
                padding: 10px 14px;
            }
            .faq-question {
                font-size: 15px;
                padding: 14px 16px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== Scrollbar ===== */
        ::-webkit-scrollbar {
            width: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--primary-light);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--primary);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-light);
            padding: 16px 0 0;
            max-width: var(--max-width);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .breadcrumb a {
            color: var(--text-light);
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb span {
            color: var(--text-secondary);
        }
        .breadcrumb i {
            font-size: 10px;
            color: var(--text-muted);
        }

        @media (max-width: 520px) {
            .breadcrumb {
                padding-left: 16px;
                padding-right: 16px;
                font-size: 12px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a44;
            --primary-light: #2c4270;
            --primary-dark: #0f1a2e;
            --accent: #d4a853;
            --accent-light: #e8c97a;
            --accent-dark: #b8923a;
            --bg-body: #f8f6f0;
            --bg-card: #ffffff;
            --bg-section-alt: #f0ede6;
            --bg-dark: #1a2a44;
            --text-primary: #1a1a2e;
            --text-secondary: #5a5a7a;
            --text-light: #8a8aaa;
            --text-inverse: #f8f6f0;
            --border: #e0ddd6;
            --border-light: #f0ede6;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(26,42,68,0.06);
            --shadow-md: 0 8px 30px rgba(26,42,68,0.08);
            --shadow-lg: 0 20px 60px rgba(26,42,68,0.10);
            --shadow-accent: 0 4px 20px rgba(212,168,83,0.25);
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --font-serif: Georgia, 'Times New Roman', 'Noto Serif SC', serif;
            --nav-height: 72px;
            --max-width: 1200px;
            --content-max-width: 720px;
            --gap: 24px;
            --gap-lg: 48px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: inherit; }

        /* ===== Container ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
            width: 100%;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255,255,255,0.98);
            box-shadow: 0 2px 20px rgba(26,42,68,0.08);
        }
        .header-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .logo:hover { color: var(--primary); }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
            box-shadow: 0 2px 10px rgba(26,42,68,0.15);
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-list a:hover {
            color: var(--primary);
            background: rgba(26,42,68,0.05);
        }
        .nav-list a.active {
            color: var(--text-inverse);
            background: var(--primary);
            box-shadow: 0 2px 12px rgba(26,42,68,0.15);
        }
        .nav-list a.active:hover {
            background: var(--primary-light);
        }
        .nav-cta {
            padding: 8px 22px !important;
            background: var(--accent) !important;
            color: var(--primary-dark) !important;
            font-weight: 600 !important;
            border-radius: 100px !important;
            box-shadow: var(--shadow-accent) !important;
        }
        .nav-cta:hover {
            background: var(--accent-light) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(212,168,83,0.30) !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--primary);
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .nav-toggle:hover { background: rgba(26,42,68,0.05); }

        /* ===== 文章 Banner ===== */
        .article-banner {
            position: relative;
            margin-top: var(--nav-height);
            padding: 80px 0 60px;
            background: var(--primary-dark);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            width: 100%;
            height: 100%;
            opacity: 0.3;
            z-index: 0;
        }
        .article-banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,26,46,0.85) 0%, rgba(26,42,68,0.70) 50%, rgba(45,27,78,0.60) 100%);
            z-index: 1;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(248,246,240,0.7);
            margin-bottom: 20px;
        }
        .article-breadcrumb a {
            color: rgba(248,246,240,0.8);
            transition: color var(--transition);
        }
        .article-breadcrumb a:hover { color: var(--accent); }
        .article-breadcrumb .sep { color: rgba(248,246,240,0.4); }
        .article-breadcrumb .current { color: var(--accent-light); }
        .article-category-badge {
            display: inline-block;
            padding: 4px 16px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 100px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .article-title {
            font-size: clamp(1.75rem, 4vw, 2.8rem);
            font-weight: 800;
            color: var(--text-inverse);
            line-height: 1.25;
            max-width: 860px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            margin-top: 20px;
            font-size: 0.9rem;
            color: rgba(248,246,240,0.75);
        }
        .article-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i { font-size: 0.8rem; color: var(--accent); }
        .article-meta .author-name { font-weight: 600; color: rgba(248,246,240,0.9); }

        /* ===== 文章主体 ===== */
        .article-main {
            padding: 48px 0 64px;
            flex: 1;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: var(--gap-lg);
            align-items: start;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 40px 48px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }
        .article-content .content-body {
            font-family: var(--font-serif);
            font-size: 1.1rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content .content-body p {
            margin-bottom: 1.6em;
        }
        .article-content .content-body h2,
        .article-content .content-body h3,
        .article-content .content-body h4 {
            font-family: var(--font-sans);
            font-weight: 700;
            color: var(--primary);
            margin-top: 2em;
            margin-bottom: 0.8em;
            line-height: 1.3;
        }
        .article-content .content-body h2 { font-size: 1.65rem; }
        .article-content .content-body h3 { font-size: 1.35rem; }
        .article-content .content-body h4 { font-size: 1.15rem; }
        .article-content .content-body img {
            border-radius: var(--radius-sm);
            margin: 2em auto;
            box-shadow: var(--shadow-sm);
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.6em 0;
            background: rgba(212,168,83,0.06);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-secondary);
        }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin: 1em 0 1.6em;
            padding-left: 1.6em;
        }
        .article-content .content-body ul { list-style: disc; }
        .article-content .content-body ol { list-style: decimal; }
        .article-content .content-body li { margin-bottom: 0.4em; }
        .article-content .content-body a { color: var(--accent-dark); text-decoration: underline; text-underline-offset: 2px; }
        .article-content .content-body a:hover { color: var(--primary); }
        .article-content .content-body code {
            background: #f0ede6;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--primary-dark);
        }
        .article-content .content-body pre {
            background: var(--primary-dark);
            color: #e8e8e8;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 1.6em 0;
        }
        .article-content .content-body hr {
            border: none;
            height: 1px;
            background: var(--border);
            margin: 2.4em 0;
        }

        /* 文章标签 */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 16px;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 0.8rem;
            border-radius: 100px;
            transition: all var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: var(--text-inverse);
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 20px;
        }
        .article-share span { font-size: 0.85rem; color: var(--text-light); }
        .article-share a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-section-alt);
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .article-share a:hover {
            background: var(--primary);
            color: var(--text-inverse);
            transform: translateY(-2px);
        }

        /* ===== 侧边栏 ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--gap);
            position: sticky;
            top: calc(var(--nav-height) + 24px);
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--accent);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { color: var(--accent); }
        .toc-list { font-size: 0.9rem; }
        .toc-list li { margin-bottom: 8px; }
        .toc-list a {
            color: var(--text-secondary);
            display: block;
            padding: 4px 8px;
            border-radius: 4px;
            transition: all var(--transition);
            border-left: 2px solid transparent;
        }
        .toc-list a:hover {
            color: var(--primary);
            background: rgba(26,42,68,0.03);
            border-left-color: var(--accent);
        }
        .sidebar-related-item {
            display: flex;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border-light);
        }
        .sidebar-related-item:last-child { border-bottom: none; padding-bottom: 0; }
        .sidebar-related-item img {
            width: 70px;
            height: 52px;
            border-radius: 6px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .sidebar-related-item .info { flex: 1; min-width: 0; }
        .sidebar-related-item .info a {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .sidebar-related-item .info a:hover { color: var(--accent); }
        .sidebar-related-item .info .date {
            font-size: 0.75rem;
            color: var(--text-light);
            margin-top: 2px;
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 64px 0;
            background: var(--bg-section-alt);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .related-section .section-sub {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 32px;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: var(--gap);
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px;
        }
        .related-card .card-body .cat {
            font-size: 0.75rem;
            color: var(--accent);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .related-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 6px 0 8px;
            line-height: 1.4;
        }
        .related-card .card-body h4 a { color: inherit; }
        .related-card .card-body h4 a:hover { color: var(--accent); }
        .related-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body .meta {
            font-size: 0.78rem;
            color: var(--text-light);
            margin-top: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 64px 0;
            background: var(--primary);
            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: 0.08;
            z-index: 0;
        }
        .cta-section .container { position: relative; z-index: 1; }
        .cta-inner {
            max-width: 640px;
            margin: 0 auto;
            text-align: center;
        }
        .cta-inner h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .cta-inner p {
            font-size: 1rem;
            color: rgba(248,246,240,0.8);
            margin-bottom: 28px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary-dark);
            box-shadow: var(--shadow-accent);
        }
        .btn-primary:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(212,168,83,0.35);
        }
        .btn-outline-light {
            background: transparent;
            color: var(--text-inverse);
            border: 2px solid rgba(248,246,240,0.3);
        }
        .btn-outline-light:hover {
            background: rgba(248,246,240,0.1);
            border-color: var(--accent);
            color: var(--accent);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(248,246,240,0.7);
            padding: 48px 0 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--gap);
        }
        .footer-top {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand .logo {
            color: var(--text-inverse);
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(248,246,240,0.6);
            max-width: 360px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 16px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(248,246,240,0.6);
            font-size: 0.9rem;
            transition: all var(--transition);
        }
        .footer-social a:hover {
            background: var(--accent);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-inverse);
            margin-bottom: 16px;
        }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a {
            font-size: 0.85rem;
            color: rgba(248,246,240,0.5);
            transition: color var(--transition);
        }
        .footer-col ul li a:hover { color: var(--accent); }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding-top: 20px;
            font-size: 0.8rem;
            color: rgba(248,246,240,0.4);
        }
        .footer-bottom span { margin: 4px 0; }

        /* ===== 内容未找到 ===== */
        .not-found-box {
            text-align: center;
            padding: 80px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
        }
        .not-found-box i {
            font-size: 3rem;
            color: var(--accent);
            margin-bottom: 16px;
        }
        .not-found-box h2 {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                position: static;
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: var(--gap);
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-list {
                display: none;
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 16px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-md);
                gap: 4px;
            }
            .nav-list.open { display: flex; }
            .nav-list a { width: 100%; text-align: center; padding: 12px; }
            .nav-toggle { display: block; }
            .article-banner { padding: 60px 0 40px; min-height: 240px; }
            .article-title { font-size: 1.5rem; }
            .article-content { padding: 24px 20px; }
            .article-content .content-body { font-size: 1rem; }
            .article-sidebar { grid-template-columns: 1fr; }
            .related-grid { grid-template-columns: 1fr; }
            .footer-top { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .cta-inner h2 { font-size: 1.5rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; flex-wrap: wrap; }
            .article-breadcrumb { font-size: 0.78rem; }
        }

        @media (max-width: 520px) {
            .article-banner { padding: 48px 0 32px; min-height: 200px; }
            .article-title { font-size: 1.25rem; }
            .article-content { padding: 16px 14px; border-radius: var(--radius-sm); }
            .article-content .content-body { font-size: 0.95rem; }
            .article-content .content-body h2 { font-size: 1.35rem; }
            .article-content .content-body h3 { font-size: 1.15rem; }
            .article-meta { font-size: 0.78rem; }
            .related-card img { height: 140px; }
            .btn { padding: 10px 24px; font-size: 0.88rem; }
            .sidebar-card { padding: 16px; }
        }

        /* ===== 辅助样式 ===== */
        .wave-divider {
            position: relative;
            height: 40px;
            overflow: hidden;
            margin-top: -20px;
        }
        .wave-divider svg {
            position: absolute;
            bottom: 0;
            width: 100%;
            height: 40px;
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }