/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --primary: #0a0a23;
            --primary-light: #1b1b4b;
            --accent: #ff6b35;
            --accent-hover: #e85d2c;
            --accent-glow: rgba(255, 107, 53, 0.3);
            --gold: #ffd700;
            --gold-dark: #e6c200;
            --bg: #f4f5f9;
            --bg-card: #ffffff;
            --bg-dark: #0d0d2b;
            --text: #1a1a2e;
            --text-light: #6c757d;
            --text-white: #f8f9fa;
            --border: #e9ecef;
            --border-light: rgba(255,255,255,0.12);
            --shadow: 0 8px 32px rgba(0,0,0,0.08);
            --shadow-hover: 0 16px 48px rgba(0,0,0,0.14);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font);
            color: var(--text);
            background: var(--bg);
            line-height: 1.6;
            font-size: 16px;
        }
        a { color: inherit; text-decoration: none; transition: 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 { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-title {
            font-size: 2rem;
            margin-bottom: 0.5rem;
            color: var(--primary);
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-light);
            margin-bottom: 2.5rem;
            max-width: 600px;
        }
        .section-padding { padding: 80px 0; }
        .text-center { text-align: center; }
        .flex-center { display: flex; align-items: center; justify-content: center; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px var(--accent-glow);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: transparent;
            color: #fff;
            border-color: rgba(255,255,255,0.4);
        }
        .btn-secondary:hover {
            border-color: #fff;
            background: rgba(255,255,255,0.08);
            transform: translateY(-2px);
        }
        .btn-gold {
            background: var(--gold);
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(255,215,0,0.35);
        }
        .btn-gold:hover {
            background: var(--gold-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(255,215,0,0.45);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent);
            border-color: var(--accent);
        }
        .btn-outline:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 18px; font-size: 0.85rem; }

        /* ===== Header & Navigation ===== */
        .header {
            position: fixed;
            top: 0; left: 0; right: 0;
            z-index: 1000;
            background: rgba(10,10,35,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .header.scrolled { background: rgba(10,10,35,0.98); box-shadow: 0 4px 30px rgba(0,0,0,0.3); }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--accent), var(--gold));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            font-weight: 900;
        }
        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list a {
            padding: 8px 18px;
            border-radius: 50px;
            color: rgba(255,255,255,0.75);
            font-weight: 500;
            font-size: 0.92rem;
            transition: var(--transition);
        }
        .nav-list a:hover { color: #fff; background: rgba(255,255,255,0.08); }
        .nav-list a.active {
            color: #fff;
            background: var(--accent);
            box-shadow: 0 4px 16px var(--accent-glow);
        }
        .nav-cta {
            margin-left: 8px;
        }
        .nav-cta .btn { padding: 10px 24px; font-size: 0.9rem; }
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: #fff;
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--primary);
            overflow: hidden;
            padding-top: var(--nav-height);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10,10,35,0.85) 0%, rgba(27,27,75,0.7) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 60px;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content { flex: 1.2; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255,215,0,0.15);
            color: var(--gold);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(255,215,0,0.2);
        }
        .hero h1 {
            font-size: 3.2rem;
            color: #fff;
            margin-bottom: 18px;
            line-height: 1.2;
        }
        .hero h1 span { color: var(--accent); }
        .hero p {
            font-size: 1.15rem;
            color: rgba(255,255,255,0.7);
            max-width: 560px;
            margin-bottom: 32px;
            line-height: 1.7;
        }
        .hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
        .hero-visual {
            flex: 0.8;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 24px;
            padding: 30px;
            max-width: 380px;
            width: 100%;
            box-shadow: 0 24px 80px rgba(0,0,0,0.3);
        }
        .hero-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 14px;
        }
        .hero-card-item {
            background: rgba(255,255,255,0.06);
            border-radius: 14px;
            padding: 18px 14px;
            text-align: center;
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .hero-card-item:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
        .hero-card-item i { font-size: 1.6rem; color: var(--gold); margin-bottom: 8px; display: block; }
        .hero-card-item span { font-size: 0.85rem; color: rgba(255,255,255,0.8); font-weight: 500; }

        /* ===== Features ===== */
        .features { background: var(--bg-card); }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--bg);
            border-radius: var(--radius);
            padding: 36px 28px;
            text-align: center;
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: #fff;
        }
        .feature-icon.orange { background: linear-gradient(135deg, var(--accent), #ff8a5c); }
        .feature-icon.blue { background: linear-gradient(135deg, #4a6cf7, #6d8ffb); }
        .feature-icon.gold { background: linear-gradient(135deg, var(--gold), #ffb347); }
        .feature-card h3 { font-size: 1.2rem; margin-bottom: 10px; color: var(--primary); }
        .feature-card p { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; }

        /* ===== Category Entry ===== */
        .category-entry {
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }
        .category-entry::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .category-entry .container { position: relative; z-index: 1; }
        .category-entry .section-title { color: #fff; }
        .category-entry .section-subtitle { color: rgba(255,255,255,0.6); }
        .category-card {
            background: rgba(255,255,255,0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: var(--radius);
            padding: 40px 36px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            transition: var(--transition);
            max-width: 800px;
            margin: 0 auto;
        }
        .category-card:hover {
            background: rgba(255,255,255,0.1);
            transform: translateY(-4px);
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        .category-card-info h3 { font-size: 1.5rem; color: #fff; margin-bottom: 8px; }
        .category-card-info p { color: rgba(255,255,255,0.65); font-size: 0.98rem; }
        .category-card-info i { color: var(--gold); margin-right: 6px; }

        /* ===== Latest News ===== */
        .latest-news { background: var(--bg); }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 28px;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.82rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-meta .tag {
            background: var(--accent);
            color: #fff;
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.75rem;
        }
        .news-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--primary);
            line-height: 1.4;
        }
        .news-card h3 a { color: inherit; }
        .news-card h3 a:hover { color: var(--accent); }
        .news-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
        }
        .news-card .news-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-top: 14px;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }
        .news-card .news-footer .date { font-size: 0.82rem; color: var(--text-light); }
        .news-card .news-footer a {
            font-size: 0.85rem;
            color: var(--accent);
            font-weight: 600;
        }
        .news-card .news-footer a:hover { color: var(--accent-hover); gap: 6px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 48px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i { font-size: 2.4rem; margin-bottom: 12px; display: block; color: var(--border); }

        /* ===== Stats ===== */
        .stats {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .stats::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }
        .stats .container { position: relative; z-index: 1; }
        .stats .section-title { color: #fff; }
        .stats .section-subtitle { color: rgba(255,255,255,0.5); }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255,255,255,0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255,255,255,0.06);
            transition: var(--transition);
        }
        .stat-item:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--gold), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label { font-size: 0.95rem; color: rgba(255,255,255,0.6); margin-top: 6px; }

        /* ===== Featured Picks ===== */
        .featured-picks { background: var(--bg-card); }
        .picks-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .pick-card {
            border-radius: var(--radius);
            overflow: hidden;
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .pick-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: transparent;
        }
        .pick-img {
            height: 200px;
            background: var(--primary-light);
            position: relative;
            overflow: hidden;
        }
        .pick-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .pick-card:hover .pick-img img { transform: scale(1.05); }
        .pick-img .pick-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--accent);
            color: #fff;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
        }
        .pick-body { padding: 20px 22px 24px; }
        .pick-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .pick-body h3 a { color: var(--primary); }
        .pick-body h3 a:hover { color: var(--accent); }
        .pick-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; }
        .pick-body .pick-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: 12px;
            font-size: 0.82rem;
            color: var(--text-light);
        }

        /* ===== FAQ ===== */
        .faq { background: var(--bg); }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            color: var(--primary);
            background: none;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--accent); }
        .faq-question i { transition: var(--transition); color: var(--accent); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta {
            background: var(--primary);
            position: relative;
            overflow: hidden;
        }
        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta .container { position: relative; z-index: 1; text-align: center; }
        .cta h2 { font-size: 2.2rem; color: #fff; margin-bottom: 14px; }
        .cta p { color: rgba(255,255,255,0.65); max-width: 560px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .footer {
            background: var(--primary);
            border-top: 1px solid var(--border-light);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .logo { margin-bottom: 14px; }
        .footer-brand p { color: rgba(255,255,255,0.5); font-size: 0.92rem; line-height: 1.7; max-width: 320px; }
        .footer h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; }
        .footer ul li { margin-bottom: 10px; }
        .footer ul a { color: rgba(255,255,255,0.5); font-size: 0.9rem; }
        .footer ul a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 20px;
            text-align: center;
            color: rgba(255,255,255,0.35);
            font-size: 0.85rem;
        }
        .footer-bottom a { color: rgba(255,255,255,0.4); }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.6rem; }
            .hero .container { flex-direction: column; text-align: center; }
            .hero-content p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-card { max-width: 100%; }
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .picks-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .nav-list { display: none; }
            .hamburger { display: flex; }
            .nav-list.open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: var(--nav-height);
                left: 0; right: 0;
                background: rgba(10,10,35,0.98);
                backdrop-filter: blur(16px);
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border-light);
            }
            .nav-list.open a { padding: 12px 18px; width: 100%; }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .hero { min-height: auto; padding-top: var(--nav-height); }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .hero .container { padding-top: 20px; padding-bottom: 40px; }
            .section-padding { padding: 50px 0; }
            .section-title { font-size: 1.6rem; }
            .features-grid { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
            .stat-number { font-size: 2rem; }
            .picks-grid { grid-template-columns: 1fr; }
            .category-card { flex-direction: column; text-align: center; padding: 28px 20px; }
            .cta h2 { font-size: 1.6rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; text-align: center; }
            .footer-brand p { margin: 0 auto; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.6rem; }
            .hero-actions { flex-direction: column; align-items: center; }
            .hero-actions .btn { width: 100%; justify-content: center; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
            .stat-item { padding: 20px 12px; }
            .stat-number { font-size: 1.6rem; }
            .faq-question { font-size: 0.92rem; padding: 16px 18px; }
            .btn { padding: 10px 20px; font-size: 0.88rem; }
            .news-card { padding: 18px 20px; }
        }
        @media (min-width: 769px) {
            .nav-list { display: flex !important; }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --primary-light: #dbeafe;
            --primary-50: #eff6ff;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fef3c7;
            --bg: #ffffff;
            --bg-alt: #f8fafc;
            --bg-card: #ffffff;
            --text: #0f172a;
            --text-weak: #64748b;
            --text-weakest: #94a3b8;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.07);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.1);
            --transition: 0.25s ease;
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', 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;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

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

        ul,
        ol {
            list-style: none;
        }

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

        h1 {
            font-size: 2.75rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.375rem;
        }
        h4 {
            font-size: 1.125rem;
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.875rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            h3 {
                font-size: 1.2rem;
            }
        }

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

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

        /* ===== 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-sm);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }

        .btn i {
            font-size: 1.05em;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.35);
        }

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

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

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

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

        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.35);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

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

        /* ===== 标签 ===== */
        .tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            border-radius: 100px;
            background: var(--primary-light);
            color: var(--primary);
            transition: all var(--transition);
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
        }

        .tag-accent {
            background: var(--accent-light);
            color: var(--accent-dark);
        }

        .tag-accent:hover {
            background: var(--accent);
            color: #fff;
        }

        .tag-ghost {
            background: var(--bg-alt);
            color: var(--text-weak);
        }

        /* ===== 徽章 ===== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            font-size: 0.75rem;
            font-weight: 700;
            border-radius: 100px;
            background: var(--primary);
            color: #fff;
        }

        .badge-accent {
            background: var(--accent);
        }

        .badge-soft {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
        }

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

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

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

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

        .card-body h3 {
            margin-bottom: 8px;
        }

        .card-body p {
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.6;
        }

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

        /* ===== 导航 Header ===== */
        .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(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow var(--transition);
        }

        .header.scrolled {
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
        }

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

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            flex-shrink: 0;
        }

        .logo:hover {
            color: var(--text);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-xs);
            font-size: 1.3rem;
            font-weight: 800;
        }

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

        .nav-list li a {
            display: block;
            padding: 8px 18px;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            color: var(--text-weak);
            transition: all var(--transition);
        }

        .nav-list li a:hover {
            color: var(--primary);
            background: var(--primary-50);
        }

        .nav-list li a.active {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-list li.nav-cta a {
            padding: 10px 24px;
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-sm);
            font-weight: 700;
            border: 2px solid var(--primary);
        }

        .nav-list li.nav-cta a:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.3);
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
            z-index: 1001;
        }

        .hamburger span {
            display: block;
            width: 28px;
            height: 3px;
            background: var(--text);
            border-radius: 4px;
            transition: all var(--transition);
        }

        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(6px, 6px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

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

            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                -webkit-backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 20px 24px 30px;
                gap: 4px;
                box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.35s ease;
                border-bottom: 2px solid var(--border);
                pointer-events: none;
            }

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

            .nav-list li a {
                padding: 14px 18px;
                font-size: 1.05rem;
                width: 100%;
                text-align: center;
            }

            .nav-list li.nav-cta {
                margin-top: 12px;
                width: 100%;
            }

            .nav-list li.nav-cta a {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
        }

        /* ===== Hero / Banner ===== */
        .page-hero {
            padding-top: calc(var(--header-h) + 20px);
            padding-bottom: 60px;
            background: linear-gradient(135deg, var(--primary-50) 0%, #ffffff 60%);
            position: relative;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }

        .page-hero .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.12;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-hero h1 {
            font-size: 2.75rem;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero p {
            font-size: 1.15rem;
            color: var(--text-weak);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        .page-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px 40px;
            margin-top: 12px;
        }

        .page-hero .hero-meta span {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            color: var(--text-weak);
        }

        .page-hero .hero-meta span i {
            color: var(--primary);
            font-size: 1.1rem;
        }

        @media (max-width: 768px) {
            .page-hero {
                min-height: 260px;
                padding-bottom: 40px;
            }
            .page-hero h1 {
                font-size: 1.9rem;
            }
            .page-hero p {
                font-size: 1rem;
            }
            .page-hero .hero-meta {
                gap: 12px 20px;
            }
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: var(--bg-alt);
        }

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

        .section-header h2 {
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-weak);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto;
        }

        .section-header .tag {
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

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

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

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

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

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

        /* ===== 攻略分类卡片 ===== */
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }

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

        .guide-card .card-img-wrap {
            position: relative;
            overflow: hidden;
        }

        .guide-card .card-img-wrap img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform 0.45s ease;
        }

        .guide-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }

        .guide-card .card-img-wrap .overlay-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(4px);
            color: #fff;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 600;
        }

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

        .guide-card .card-body h3 {
            font-size: 1.2rem;
            margin-bottom: 6px;
        }

        .guide-card .card-body p {
            font-size: 0.92rem;
            color: var(--text-weak);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .guide-card .card-body .meta-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-weakest);
        }

        .guide-card .card-body .meta-row span {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== 攻略列表 ===== */
        .guide-list-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-light);
            transition: background var(--transition);
        }

        .guide-list-item:last-child {
            border-bottom: none;
        }

        .guide-list-item .num {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.1rem;
        }

        .guide-list-item .num.accent {
            background: var(--accent-light);
            color: var(--accent-dark);
        }

        .guide-list-item .content {
            flex: 1;
        }

        .guide-list-item .content h4 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }

        .guide-list-item .content h4 a:hover {
            color: var(--primary);
        }

        .guide-list-item .content p {
            font-size: 0.9rem;
            color: var(--text-weak);
        }

        .guide-list-item .content .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-top: 8px;
        }

        .guide-list-item .content .tags .tag {
            font-size: 0.7rem;
            padding: 2px 12px;
        }

        @media (max-width: 768px) {
            .guide-list-item {
                gap: 14px;
                padding: 16px 0;
            }
            .guide-list-item .num {
                width: 32px;
                height: 32px;
                font-size: 0.9rem;
            }
        }

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

        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

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

        .stat-item .number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item .number.accent {
            color: var(--accent);
        }

        .stat-item .label {
            font-size: 0.95rem;
            color: var(--text-weak);
            margin-top: 6px;
        }

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

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .number {
                font-size: 1.8rem;
            }
        }

        /* ===== 流程步骤 ===== */
        .steps {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-item .step-num {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 8px 24px rgba(37, 99, 235, 0.25);
        }

        .step-item .step-num.accent {
            background: var(--accent);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.25);
        }

        .step-item h4 {
            margin-bottom: 6px;
        }

        .step-item p {
            color: var(--text-weak);
            font-size: 0.92rem;
            max-width: 280px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .steps {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .step-item p {
                max-width: 100%;
            }
        }

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

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

        .faq-item:hover {
            border-color: var(--primary-light);
        }

        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            user-select: none;
            background: none;
            width: 100%;
            text-align: left;
            color: var(--text);
            transition: background var(--transition);
        }

        .faq-question:hover {
            background: var(--primary-50);
        }

        .faq-question i {
            transition: transform var(--transition);
            color: var(--text-weakest);
            font-size: 0.9rem;
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-weak);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 24px 20px;
        }

        @media (max-width: 768px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 16px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 16px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #7c3aed);
            padding: 72px 0;
            text-align: center;
            color: #fff;
            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: 0.08;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 2;
        }

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

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

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

        .cta-section .btn:hover {
            background: transparent;
            color: #fff;
            border-color: #fff;
            transform: translateY(-2px);
        }

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

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

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

        .footer-brand .logo .logo-icon {
            background: var(--primary);
        }

        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            opacity: 0.7;
            max-width: 320px;
        }

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

        .footer ul li {
            margin-bottom: 8px;
        }

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

        .footer ul li a:hover {
            color: #fff;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 0.85rem;
            opacity: 0.6;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.8);
        }

        .footer-bottom a:hover {
            color: #fff;
        }

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

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer {
                padding-top: 40px;
            }
        }

        /* ===== 辅助 ===== */
        .text-center {
            text-align: center;
        }

        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }
        .mb-32 {
            margin-bottom: 32px;
        }

        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-meta span {
                font-size: 0.8rem;
            }
            .section-header p {
                font-size: 0.92rem;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .guide-card .card-body {
                padding: 16px 18px 20px;
            }
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #0f3a8e;
            --primary-light: #3b82f6;
            --accent: #f59e0b;
            --accent-dark: #d97706;
            --accent-light: #fbbf24;
            --bg: #f1f5f9;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-secondary: #64748b;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
            --shadow-xl: 0 20px 60px rgba(0,0,0,0.10);
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
            --container: 1200px;
            --content-width: 820px;
            --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;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-md); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
        h1 { font-size: 2.2rem; }
        h2 { font-size: 1.75rem; }
        h3 { font-size: 1.35rem; }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1rem; }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        .container {
            width: 100%;
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container-narrow {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== 按钮系统 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: 2px solid transparent;
            text-align: center;
            white-space: nowrap;
        }
        .btn i { font-size: 1.05em; }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            color: var(--text-white);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(26,86,219,0.3);
        }
        .btn-accent {
            background: var(--accent);
            color: #1e293b;
            border-color: var(--accent);
        }
        .btn-accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            color: #1e293b;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(245,158,11,0.3);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: var(--text-white);
        }
        .btn-outline:hover {
            background: var(--text-white);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
        }
        .btn-lg {
            padding: 16px 38px;
            font-size: 1.1rem;
        }
        .btn:focus-visible {
            outline: 3px solid var(--primary-light);
            outline-offset: 2px;
        }

        /* ===== 徽章 / 标签 ===== */
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.8rem;
            font-weight: 600;
            background: var(--primary);
            color: var(--text-white);
            letter-spacing: 0.3px;
        }
        .badge-accent {
            background: var(--accent);
            color: #1e293b;
        }
        .badge-outline {
            background: transparent;
            border: 1.5px solid var(--border);
            color: var(--text-secondary);
        }
        .tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.8rem;
            font-weight: 500;
            background: var(--bg);
            color: var(--text-secondary);
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .tag:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }

        /* ===== Header & Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            text-decoration: none;
            transition: var(--transition);
            flex-shrink: 0;
        }
        .logo:hover { color: var(--primary); }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: var(--text-white);
            border-radius: var(--radius-md);
            font-size: 1.3rem;
            font-weight: 800;
        }
        .logo span:last-child { letter-spacing: 0.5px; }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-list > li > a {
            display: block;
            padding: 8px 18px;
            border-radius: var(--radius-md);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text);
            transition: var(--transition);
            position: relative;
        }
        .nav-list > li > a:hover {
            background: var(--bg);
            color: var(--primary);
        }
        .nav-list > li > a.active {
            color: var(--primary);
            background: rgba(26,86,219,0.08);
        }
        .nav-list > li > a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn {
            padding: 8px 22px;
            font-size: 0.9rem;
        }
        .nav-cta .btn i { margin-right: 4px; }

        /* 汉堡菜单按钮 */
        .hamburger {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 8px;
            background: none;
            border: none;
            gap: 5px;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text);
            border-radius: 3px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            padding: 140px 0 80px;
            margin-top: var(--header-h);
            background: var(--bg-dark);
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15,23,42,0.92) 0%, rgba(15,23,42,0.70) 100%);
            z-index: 1;
        }
        .article-hero .container-narrow {
            position: relative;
            z-index: 2;
        }
        .article-hero .badge {
            margin-bottom: 20px;
            background: var(--accent);
            color: #1e293b;
            font-size: 0.85rem;
            padding: 6px 18px;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            color: var(--text-white);
            line-height: 1.25;
            margin-bottom: 20px;
            max-width: 90%;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px 28px;
            color: rgba(255,255,255,0.7);
            font-size: 0.95rem;
        }
        .article-meta i { margin-right: 6px; }
        .article-meta .meta-item {
            display: flex;
            align-items: center;
        }

        /* ===== 文章正文 ===== */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 48px 52px;
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.4rem;
        }
        .article-body .content h2 {
            margin-top: 2.4rem;
            margin-bottom: 1rem;
            font-size: 1.6rem;
            color: var(--text);
        }
        .article-body .content h3 {
            margin-top: 2rem;
            margin-bottom: 0.8rem;
            font-size: 1.25rem;
        }
        .article-body .content img {
            border-radius: var(--radius-md);
            margin: 1.8rem auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--bg);
            padding: 16px 24px;
            margin: 1.6rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content ul,
        .article-body .content ol {
            padding-left: 1.6rem;
            margin-bottom: 1.4rem;
        }
        .article-body .content ul { list-style: disc; }
        .article-body .content ol { list-style: decimal; }
        .article-body .content li { margin-bottom: 0.4rem; }
        .article-body .content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
        .article-body .content a:hover { color: var(--primary-dark); }

        .article-footer-info {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 28px;
            margin-top: 40px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-share a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--bg);
            color: var(--text-secondary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .article-share a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        /* ===== 文章不存在 ===== */
        .not-found-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-md);
            padding: 80px 40px;
            text-align: center;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* ===== 相关文章 ===== */
        .related-section {
            padding: 70px 0;
            background: var(--bg);
        }
        .related-section .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .related-section .section-title h2 {
            font-size: 1.9rem;
            position: relative;
            display: inline-block;
        }
        .related-section .section-title h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 12px auto 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .related-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);
        }
        .related-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .related-card .card-img {
            width: 100%;
            height: 190px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 20px 22px 24px;
        }
        .related-card .card-body h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h3 a {
            color: var(--text);
        }
        .related-card .card-body h3 a:hover {
            color: var(--primary);
        }
        .related-card .card-body .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 12px;
        }
        .related-card .card-body .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .related-card .card-body .card-meta .badge {
            font-size: 0.7rem;
            padding: 2px 10px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-box {
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2.2rem;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 32px;
        }
        .cta-box .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== Footer ===== */
        .footer {
            background: #0b1120;
            color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.08);
        }
        .footer .logo {
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .footer .logo:hover { color: var(--primary-light); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 320px;
        }
        .footer h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .footer ul li { margin-bottom: 10px; }
        .footer ul li a {
            color: rgba(255,255,255,0.6);
            font-size: 0.9rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer ul li a:hover {
            color: var(--primary-light);
            transform: translateX(3px);
        }
        .footer ul li a i { font-size: 0.85rem; }
        .footer-bottom {
            padding: 24px 0;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a {
            color: rgba(255,255,255,0.5);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .article-hero h1 {
                font-size: 2.2rem;
                max-width: 100%;
            }
        }

        @media (max-width: 768px) {
            .hamburger { display: flex; }
            .nav-list {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                z-index: 999;
            }
            .nav-list.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-list > li > a {
                padding: 12px 16px;
                font-size: 1rem;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-list > li > a.active::after { display: none; }

            .article-hero {
                padding: 110px 0 50px;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-body {
                padding: 28px 20px;
            }
            .article-body .content {
                font-size: 0.98rem;
            }
            .article-footer-info {
                flex-direction: column;
                gap: 16px;
                align-items: flex-start;
            }

            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-box h2 {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand p { max-width: 100%; }
            .container { padding: 0 18px; }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                font-size: 0.82rem;
                gap: 10px 16px;
            }
            .article-body {
                padding: 20px 14px;
                border-radius: var(--radius-md);
            }
            .article-body .content {
                font-size: 0.92rem;
                line-height: 1.75;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 1rem;
            }
            .cta-box h2 {
                font-size: 1.3rem;
            }
            .cta-box p {
                font-size: 0.95rem;
            }
            .related-card .card-img {
                height: 160px;
            }
            .logo {
                font-size: 1.25rem;
            }
            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 1.1rem;
            }
            .article-hero .badge {
                font-size: 0.75rem;
                padding: 4px 14px;
            }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .mt-2 { margin-top: 2rem; }
        .gap-1 { gap: 1rem; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0,0,0,0);
            border: 0;
        }