/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2a6df4;
            --primary-dark: #1a4fa8;
            --primary-light: #e8effe;
            --secondary: #f97316;
            --secondary-dark: #d45d0f;
            --accent: #10b981;
            --bg: #f8fafc;
            --bg-white: #ffffff;
            --bg-dark: #0f172a;
            --bg-card: #ffffff;
            --text: #1e293b;
            --text-light: #64748b;
            --text-white: #f1f5f9;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-top-height: 40px;
            --nav-height: 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);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            min-height: 100vh;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2rem, 5vw, 3.2rem);
        }
        h2 {
            font-size: clamp(1.5rem, 3.5vw, 2.4rem);
            margin-bottom: 0.5rem;
        }
        h3 {
            font-size: clamp(1.15rem, 2vw, 1.5rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 顶部信息条 ===== */
        .header-top {
            background: var(--bg-dark);
            color: var(--text-white);
            font-size: 0.8rem;
            height: var(--header-top-height);
            display: flex;
            align-items: center;
        }
        .header-top .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .header-top .domain-info {
            color: #94a3b8;
            letter-spacing: 0.3px;
        }
        .header-top .domain-info i {
            margin-right: 6px;
            color: var(--secondary);
        }
        .header-top .top-actions {
            display: flex;
            gap: 16px;
            align-items: center;
        }
        .header-top .top-actions a {
            color: #cbd5e1;
            font-size: 0.78rem;
            transition: color var(--transition);
        }
        .header-top .top-actions a:hover {
            color: #ffffff;
        }
        .header-top .top-actions .btn-top {
            background: var(--secondary);
            color: #fff;
            padding: 4px 16px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.75rem;
            transition: background var(--transition), transform var(--transition);
        }
        .header-top .top-actions .btn-top:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: scale(1.03);
        }
        @media (max-width: 640px) {
            .header-top .domain-info span {
                display: none;
            }
            .header-top .top-actions a:not(.btn-top) {
                display: none;
            }
        }

        /* ===== 主导航 ===== */
        .main-nav {
            background: var(--bg-white);
            border-bottom: 1px solid var(--border);
            height: var(--nav-height);
            position: sticky;
            top: 0;
            z-index: 100;
            transition: box-shadow var(--transition);
        }
        .main-nav.scrolled {
            box-shadow: var(--shadow);
        }
        .main-nav .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 100%;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .nav-brand i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .nav-brand span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.92rem;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: #fff;
        }
        .nav-links a.active:hover {
            background: var(--primary-dark);
            color: #fff;
        }
        .nav-cta {
            background: var(--secondary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: 30px !important;
            font-weight: 600 !important;
            font-size: 0.85rem !important;
            margin-left: 8px;
            transition: background var(--transition), transform var(--transition) !important;
        }
        .nav-cta:hover {
            background: var(--secondary-dark) !important;
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: 8px;
            background: var(--bg);
            cursor: pointer;
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: var(--border);
        }
        @media (max-width: 900px) {
            .nav-links {
                position: fixed;
                top: calc(var(--header-top-height) + var(--nav-height));
                left: 0;
                right: 0;
                background: var(--bg-white);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                transform: translateY(-120%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.25s ease;
                pointer-events: none;
                z-index: 99;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
            }
            .nav-links a.active {
                background: var(--primary-light);
                color: var(--primary);
            }
            .nav-links a.active:hover {
                background: var(--primary-light);
                color: var(--primary);
            }
            .nav-cta {
                margin-left: 0;
                text-align: center;
                margin-top: 6px;
            }
            .nav-toggle {
                display: block;
            }
        }
        @media (max-width: 480px) {
            .nav-brand {
                font-size: 1.1rem;
            }
            .nav-brand i {
                font-size: 1.3rem;
            }
        }

        /* ===== Hero 首屏 ===== */
        .hero {
            position: relative;
            min-height: 560px;
            display: flex;
            align-items: center;
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.55) 100%);
            z-index: 0;
        }
        .hero .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 24px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.12);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.18);
            padding: 6px 20px;
            border-radius: 40px;
            color: var(--text-white);
            font-size: 0.82rem;
            font-weight: 500;
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            color: var(--secondary);
            font-size: 0.9rem;
        }
        .hero h1 {
            color: #ffffff;
            font-weight: 800;
            letter-spacing: -0.5px;
            max-width: 780px;
            margin: 0 auto 20px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }
        .hero h1 em {
            font-style: normal;
            background: linear-gradient(135deg, #60a5fa, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            color: #cbd5e1;
            font-size: 1.15rem;
            max-width: 600px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--secondary);
            color: #fff;
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 20px rgba(249, 115, 22, 0.4);
        }
        .btn-primary:hover {
            background: var(--secondary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(249, 115, 22, 0.5);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: #fff;
            padding: 14px 34px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #ffffff;
            color: #fff;
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 48px;
            padding-top: 36px;
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }
        .hero-stats .stat-item {
            text-align: center;
        }
        .hero-stats .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.2;
        }
        .hero-stats .stat-label {
            font-size: 0.85rem;
            color: #94a3b8;
            margin-top: 4px;
        }
        @media (max-width: 768px) {
            .hero {
                min-height: 420px;
            }
            .hero .container {
                padding: 50px 16px;
            }
            .hero h1 {
                font-size: 1.8rem;
            }
            .hero p {
                font-size: 1rem;
            }
            .hero-stats {
                gap: 24px;
            }
            .hero-stats .stat-number {
                font-size: 1.4rem;
            }
        }
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.5rem;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                padding: 12px 24px;
                font-size: 0.9rem;
                width: 100%;
                justify-content: center;
            }
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== 通用板块标题 ===== */
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            margin-bottom: 12px;
        }
        .section-header p {
            max-width: 580px;
            margin: 0 auto;
            font-size: 1.05rem;
        }
        .section-header .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            padding: 4px 16px;
            border-radius: 30px;
            font-size: 0.78rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        /* ===== 板块间距 ===== */
        .section {
            padding: 80px 0;
        }
        .section-alt {
            background: var(--bg-white);
        }
        @media (max-width: 768px) {
            .section {
                padding: 50px 0;
            }
            .section-header {
                margin-bottom: 32px;
            }
        }

        /* ===== 特色板块 / 核心优势 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary);
        }
        .feature-card .icon-wrap {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            background: var(--primary-light);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--primary);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .feature-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05);
        }
        .feature-card h3 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .feature-card p {
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ===== 分类入口 ===== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
        }
        .category-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0;
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
            display: block;
            color: inherit;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            color: inherit;
        }
        .category-card .cat-img {
            height: 140px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .category-card .cat-img .cat-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(0, 0, 0, 0.6), transparent);
        }
        .category-card .cat-body {
            padding: 18px 20px 20px;
        }
        .category-card .cat-body h3 {
            font-size: 1.05rem;
            margin-bottom: 4px;
        }
        .category-card .cat-body p {
            font-size: 0.85rem;
            color: var(--text-light);
            margin-bottom: 0;
        }
        .category-card .cat-badge {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 20px;
            margin-top: 8px;
        }

        /* ===== 资讯 / 文章列表 ===== */
        .post-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .post-card .post-img {
            height: 190px;
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .post-card .post-cat-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--secondary);
            color: #fff;
            font-size: 0.72rem;
            font-weight: 600;
            padding: 3px 14px;
            border-radius: 20px;
            letter-spacing: 0.3px;
        }
        .post-card .post-body {
            padding: 22px 22px 24px;
        }
        .post-card .post-body h3 {
            font-size: 1.08rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card .post-body h3 a {
            color: var(--text);
            transition: color var(--transition);
        }
        .post-card .post-body h3 a:hover {
            color: var(--primary);
        }
        .post-card .post-body .post-excerpt {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .post-card .post-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.82rem;
            color: #94a3b8;
        }
        .post-card .post-meta i {
            margin-right: 4px;
        }
        .post-card .post-meta .post-date {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        /* ===== 数据 / 流程板块 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            counter-reset: step;
        }
        .step-item {
            text-align: center;
            position: relative;
            padding: 32px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .step-item .step-num {
            width: 48px;
            height: 48px;
            margin: 0 auto 18px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
        }
        .step-item h3 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 0.9rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 760px;
            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);
            overflow: hidden;
            transition: border-color var(--transition), box-shadow var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item summary {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            list-style: none;
            transition: background var(--transition);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '\f107';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 1.1rem;
            color: var(--text-light);
            transition: transform 0.3s ease;
        }
        .faq-item[open] summary::after {
            transform: rotate(180deg);
        }
        .faq-item summary:hover {
            background: var(--primary-light);
        }
        .faq-item .faq-answer {
            padding: 0 24px 20px;
            font-size: 0.95rem;
            color: var(--text-light);
            line-height: 1.7;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            margin-top: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(15, 23, 42, 0.82);
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 {
            color: #ffffff;
            margin-bottom: 16px;
        }
        .cta-section p {
            color: #cbd5e1;
            max-width: 520px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
        }
        .cta-section .btn-primary {
            background: #ffffff;
            color: var(--primary);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
        }
        .cta-section .btn-primary:hover {
            background: #f1f5f9;
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-dark);
            color: #94a3b8;
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .nav-brand {
            color: #ffffff;
            margin-bottom: 14px;
            font-size: 1.2rem;
        }
        .footer-brand .nav-brand span {
            background: linear-gradient(135deg, #60a5fa, #f97316);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .footer-brand p {
            font-size: 0.9rem;
            color: #64748b;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-col h4 {
            color: #ffffff;
            font-size: 0.95rem;
            margin-bottom: 18px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #64748b;
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: #ffffff;
        }
        .footer-bottom {
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.82rem;
            color: #475569;
        }
        .footer-bottom a {
            color: #64748b;
        }
        .footer-bottom a:hover {
            color: #ffffff;
        }
        .footer-bottom .footer-links {
            display: flex;
            gap: 20px;
        }
        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-light);
            font-size: 1rem;
            background: var(--bg);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .empty-state i {
            font-size: 2.4rem;
            color: #cbd5e1;
            margin-bottom: 16px;
            display: block;
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 768px) {
            .post-grid {
                grid-template-columns: 1fr;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
        }

        /* ===== 工具类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-8 {
            margin-top: 8px;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

/* roulang page: category1 */
/* ========== 设计变量 ========== */
        :root {
            --primary: #1e3a5f;
            --primary-light: #2a5298;
            --primary-dark: #0f2440;
            --secondary: #f5a623;
            --secondary-light: #ffc44d;
            --secondary-dark: #d48a1a;
            --accent: #e94560;
            --accent-light: #ff6b81;
            --bg: #f0f4f8;
            --bg-alt: #e8edf4;
            --bg-dark: #1a1a2e;
            --text: #1a1a2e;
            --text-light: #6b7280;
            --text-inverse: #ffffff;
            --border: #d1d9e6;
            --radius: 16px;
            --radius-sm: 10px;
            --radius-xs: 6px;
            --shadow: 0 8px 30px rgba(30, 58, 95, 0.10);
            --shadow-hover: 0 16px 48px rgba(30, 58, 95, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-max: 1200px;
            --header-top-bg: #0f2440;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        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(--primary-dark);
        }

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

        /* ========== 顶部信息条 ========== */
        .topbar {
            background: var(--header-top-bg);
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
            padding: 6px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .topbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 6px 16px;
        }
        .topbar a {
            color: rgba(255, 255, 255, 0.8);
            font-size: 13px;
        }
        .topbar a:hover {
            color: var(--secondary-light);
        }
        .topbar-left {
            display: flex;
            align-items: center;
            gap: 18px;
        }
        .topbar-left i {
            margin-right: 4px;
            font-size: 12px;
        }
        .topbar-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .topbar-right .badge {
            background: var(--accent);
            color: #fff;
            font-size: 11px;
            padding: 1px 10px;
            border-radius: 20px;
            font-weight: 600;
        }

        /* ========== 主导航 ========== */
        .main-nav {
            background: #ffffff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 16px rgba(0, 0, 0, 0.04);
            transition: box-shadow var(--transition);
        }
        .main-nav.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
        }
        .main-nav .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.3px;
        }
        .nav-brand i {
            font-size: 28px;
            color: var(--secondary);
        }
        .nav-brand span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-light);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a i {
            font-size: 15px;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }
        .nav-links a.active {
            color: #fff;
            background: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.25);
        }
        .nav-links a.active:hover {
            background: var(--primary-light);
        }
        .nav-cta {
            background: var(--secondary) !important;
            color: #fff !important;
            padding: 8px 22px !important;
            border-radius: 30px !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 14px rgba(245, 166, 35, 0.35);
        }
        .nav-cta i {
            color: #fff !important;
        }
        .nav-cta:hover {
            background: var(--secondary-light) !important;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(245, 166, 35, 0.45) !important;
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--primary);
            padding: 6px 10px;
            border-radius: var(--radius-xs);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(30, 58, 95, 0.06);
        }

        /* ========== 移动端导航 ========== */
        @media (max-width: 820px) {
            .nav-links {
                position: fixed;
                top: 0;
                right: -100%;
                width: 280px;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                padding: 80px 24px 32px;
                gap: 8px;
                box-shadow: -8px 0 40px rgba(0, 0, 0, 0.12);
                transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                z-index: 999;
                overflow-y: auto;
                align-items: stretch;
            }
            .nav-links.open {
                right: 0;
            }
            .nav-links a {
                padding: 12px 18px;
                border-radius: var(--radius-sm);
                font-size: 16px;
                justify-content: flex-start;
            }
            .nav-links a.active {
                background: var(--primary);
                color: #fff;
            }
            .nav-links a.nav-cta {
                margin-top: 12px;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
                z-index: 1001;
            }
            /* 遮罩 */
            .nav-overlay {
                position: fixed;
                inset: 0;
                background: rgba(0, 0, 0, 0.4);
                z-index: 998;
                opacity: 0;
                pointer-events: none;
                transition: opacity 0.4s ease;
            }
            .nav-overlay.show {
                opacity: 1;
                pointer-events: auto;
            }
        }

        @media (max-width: 520px) {
            .main-nav .container {
                height: 60px;
            }
            .nav-brand {
                font-size: 18px;
            }
            .nav-brand i {
                font-size: 22px;
            }
            .topbar .container {
                font-size: 12px;
                justify-content: center;
                text-align: center;
            }
            .topbar-right .badge {
                display: none;
            }
        }

        /* ========== Hero / 分类Banner ========== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.88) 0%, rgba(30, 58, 95, 0.72) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .category-hero h1 {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }
        .category-hero h1 i {
            color: var(--secondary);
            margin-right: 10px;
        }
        .category-hero p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .hero-search {
            display: flex;
            max-width: 500px;
            margin: 0 auto;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(8px);
            border-radius: 50px;
            padding: 4px;
            border: 1px solid rgba(255, 255, 255, 0.20);
        }
        .hero-search input {
            flex: 1;
            padding: 14px 22px;
            background: transparent;
            color: #fff;
            font-size: 15px;
            border-radius: 50px 0 0 50px;
        }
        .hero-search input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }
        .hero-search button {
            padding: 14px 28px;
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            border-radius: 0 50px 50px 0;
            font-size: 15px;
            transition: background var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .hero-search button:hover {
            background: var(--secondary-light);
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 56px 0 48px;
                min-height: 260px;
            }
            .category-hero h1 {
                font-size: 30px;
            }
            .category-hero p {
                font-size: 15px;
            }
            .hero-search {
                flex-direction: column;
                border-radius: var(--radius-sm);
                background: rgba(255, 255, 255, 0.10);
            }
            .hero-search input {
                border-radius: var(--radius-sm) var(--radius-sm) 0 0;
                padding: 12px 18px;
            }
            .hero-search button {
                border-radius: 0 0 var(--radius-sm) var(--radius-sm);
                padding: 12px 18px;
                justify-content: center;
            }
        }

        @media (max-width: 480px) {
            .category-hero h1 {
                font-size: 24px;
            }
            .category-hero p {
                font-size: 14px;
            }
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 72px 0;
        }
        .section-alt {
            background: var(--bg-alt);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-inverse);
        }
        .section-title {
            font-size: 32px;
            font-weight: 800;
            text-align: center;
            margin-bottom: 12px;
            letter-spacing: -0.3px;
            color: var(--primary-dark);
        }
        .section-title i {
            color: var(--secondary);
            margin-right: 8px;
        }
        .section-sub {
            text-align: center;
            color: var(--text-light);
            font-size: 17px;
            max-width: 640px;
            margin: 0 auto 48px;
            line-height: 1.6;
        }
        .section-dark .section-title {
            color: #fff;
        }
        .section-dark .section-sub {
            color: rgba(255, 255, 255, 0.7);
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .section-sub {
                font-size: 15px;
                margin-bottom: 32px;
            }
        }

        /* ========== 标签筛选 ========== */
        .tag-filter {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
            margin-bottom: 44px;
        }
        .tag-filter .tag {
            padding: 8px 22px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 500;
            background: #fff;
            color: var(--text-light);
            border: 1px solid var(--border);
            transition: all var(--transition);
            cursor: pointer;
        }
        .tag-filter .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(30, 58, 95, 0.04);
        }
        .tag-filter .tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.20);
        }

        @media (max-width: 520px) {
            .tag-filter {
                gap: 8px;
            }
            .tag-filter .tag {
                padding: 6px 16px;
                font-size: 13px;
            }
        }

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

        .card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: var(--bg-alt);
        }
        .card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-body .card-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(30, 58, 95, 0.08);
            padding: 2px 12px;
            border-radius: 20px;
            margin-bottom: 10px;
            align-self: flex-start;
        }
        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary-dark);
            line-height: 1.4;
        }
        .card-body h3 a {
            color: inherit;
        }
        .card-body h3 a:hover {
            color: var(--primary-light);
        }
        .card-body p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-light);
            border-top: 1px solid var(--border);
            padding-top: 14px;
            margin-top: auto;
        }
        .card-meta span i {
            margin-right: 4px;
            color: var(--secondary);
        }
        .card-meta a {
            font-weight: 600;
            color: var(--primary);
            font-size: 13px;
        }
        .card-meta a i {
            margin-left: 4px;
            font-size: 12px;
            transition: transform var(--transition);
        }
        .card-meta a:hover i {
            transform: translateX(3px);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }
        }

        @media (max-width: 620px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-body {
                padding: 16px 18px 20px;
            }
            .card-body h3 {
                font-size: 16px;
            }
        }

        /* ========== 热门排行 ========== */
        .rank-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px 32px;
        }
        .rank-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            padding: 18px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            transition: all var(--transition);
        }
        .rank-item:hover {
            transform: translateX(4px);
            box-shadow: var(--shadow-hover);
        }
        .rank-num {
            font-size: 28px;
            font-weight: 800;
            color: var(--border);
            min-width: 42px;
            text-align: center;
            line-height: 1;
        }
        .rank-item:nth-child(1) .rank-num {
            color: var(--secondary);
        }
        .rank-item:nth-child(2) .rank-num {
            color: var(--secondary-light);
        }
        .rank-item:nth-child(3) .rank-num {
            color: #cd7f32;
        }
        .rank-item:nth-child(4) .rank-num,
        .rank-item:nth-child(5) .rank-num,
        .rank-item:nth-child(6) .rank-num {
            color: var(--text-light);
        }
        .rank-info {
            flex: 1;
        }
        .rank-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            margin-bottom: 4px;
        }
        .rank-info p {
            font-size: 13px;
            color: var(--text-light);
        }
        .rank-score {
            font-size: 18px;
            font-weight: 700;
            color: var(--secondary);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .rank-score i {
            font-size: 14px;
        }

        @media (max-width: 820px) {
            .rank-list {
                grid-template-columns: 1fr;
                gap: 14px;
            }
        }

        @media (max-width: 480px) {
            .rank-item {
                padding: 14px 16px;
                gap: 12px;
            }
            .rank-num {
                font-size: 22px;
                min-width: 32px;
            }
            .rank-info h4 {
                font-size: 14px;
            }
            .rank-score {
                font-size: 15px;
            }
        }

        /* ========== 专题卡片 ========== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all var(--transition);
            position: relative;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .feature-card img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
        }
        .feature-overlay {
            padding: 20px 22px 24px;
        }
        .feature-overlay h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .feature-overlay p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }
        .feature-overlay .btn-sm {
            margin-top: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            background: var(--primary);
            color: #fff;
            transition: background var(--transition);
        }
        .feature-overlay .btn-sm:hover {
            background: var(--primary-light);
        }

        @media (max-width: 900px) {
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 560px) {
            .feature-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .feature-overlay {
                padding: 16px 18px 20px;
            }
            .feature-overlay h3 {
                font-size: 16px;
            }
        }

        /* ========== 技巧区块 ========== */
        .tips-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .tip-item {
            background: #fff;
            padding: 32px 26px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            text-align: center;
            transition: all var(--transition);
            border-top: 4px solid var(--secondary);
        }
        .tip-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .tip-item .tip-icon {
            font-size: 42px;
            color: var(--primary);
            margin-bottom: 18px;
            display: block;
        }
        .tip-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--primary-dark);
        }
        .tip-item p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 820px) {
            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .tips-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .tip-item {
                padding: 24px 18px;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 16px;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: rgba(30, 58, 95, 0.02);
        }
        .faq-question i {
            color: var(--secondary);
            font-size: 18px;
            transition: transform var(--transition);
            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 0.4s ease;
            padding: 0 24px;
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 22px;
        }

        @media (max-width: 520px) {
            .faq-question {
                padding: 14px 18px;
                font-size: 14px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 18px;
            }
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--primary-dark);
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            padding: 72px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 36, 64, 0.90) 0%, rgba(30, 58, 95, 0.80) 100%);
            z-index: 1;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 34px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .cta-section h2 i {
            color: var(--secondary);
        }
        .cta-section p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            padding: 16px 40px;
            background: var(--secondary);
            color: #fff;
            font-size: 17px;
            font-weight: 700;
            border-radius: 50px;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
            box-shadow: 0 6px 24px rgba(245, 166, 35, 0.35);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 10px 32px rgba(245, 166, 35, 0.45);
            color: #fff;
        }
        .btn-outline {
            padding: 16px 40px;
            background: transparent;
            color: #fff;
            font-size: 17px;
            font-weight: 600;
            border-radius: 50px;
            border: 2px solid rgba(255, 255, 255, 0.30);
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: rgba(255, 255, 255, 0.60);
            color: #fff;
        }

        @media (max-width: 520px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 24px;
            }
            .cta-section p {
                font-size: 14px;
            }
            .btn-primary,
            .btn-outline {
                padding: 14px 28px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 0;
        }
        .footer .nav-brand {
            color: #fff;
            margin-bottom: 12px;
        }
        .footer .nav-brand span {
            background: none;
            -webkit-text-fill-color: #fff;
            background-clip: unset;
        }
        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--secondary-light);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 0;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-links {
            display: flex;
            gap: 14px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.5);
            font-size: 20px;
            transition: color var(--transition);
        }
        .footer-links a:hover {
            color: var(--secondary-light);
        }

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

        @media (max-width: 520px) {
            .footer {
                padding: 40px 0 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ========== 辅助工具类 ========== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ========== 分页 ========== */
        .pagination {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 48px;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
            background: #fff;
            color: var(--text-light);
            border: 1px solid var(--border);
        }
        .pagination a:hover {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .pagination .active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.20);
        }
        .pagination .next,
        .pagination .prev {
            width: auto;
            padding: 0 20px;
            border-radius: 30px;
        }

        @media (max-width: 480px) {
            .pagination a,
            .pagination span {
                width: 36px;
                height: 36px;
                font-size: 13px;
            }
            .pagination .next,
            .pagination .prev {
                padding: 0 14px;
                font-size: 13px;
            }
        }

        /* ========== 滚动动画 ========== */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

/* roulang page: article */
/* ===== Design Variables ===== */
:root {
    --primary: #1a2036;
    --primary-light: #2a3450;
    --primary-dark: #0e1428;
    --accent: #f5a623;
    --accent-light: #ffc04d;
    --accent-dark: #d9900f;
    --bg: #f5f7fa;
    --bg-card: #ffffff;
    --bg-dark: #1a2036;
    --text: #1a2036;
    --text-light: #6b7280;
    --text-white: #ffffff;
    --text-muted: #9ca3af;
    --border: #e5e7eb;
    --border-light: #f0f0f0;
    --radius: 16px;
    --radius-sm: 8px;
    --radius-lg: 24px;
    --shadow: 0 4px 24px rgba(26,32,54,0.08);
    --shadow-lg: 0 12px 48px rgba(26,32,54,0.12);
    --shadow-hover: 0 8px 32px rgba(26,32,54,0.15);
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    --max-width: 1200px;
    --header-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);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
button { cursor: pointer; font-family: inherit; font-size: inherit; border: none; background: none; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text); }
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Header / Nav ===== */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.96);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    height: var(--header-height);
    display: flex;
    align-items: center;
    box-shadow: 0 1px 3px rgba(26,32,54,0.04);
}
.main-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}
.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
    flex-shrink: 0;
}
.nav-brand i { font-size: 1.5rem; color: var(--accent); }
.nav-brand span { letter-spacing: -0.01em; }
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}
.nav-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-light);
    text-decoration: none;
    transition: all var(--transition);
    position: relative;
}
.nav-links a i { font-size: 0.9rem; }
.nav-links a:hover,
.nav-links a:focus-visible { color: var(--primary); background: rgba(26,32,54,0.05); }
.nav-links a.active {
    color: var(--primary);
    background: rgba(245,166,35,0.12);
    font-weight: 600;
}
.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--accent);
    border-radius: 2px;
}
.nav-cta {
    background: var(--accent) !important;
    color: var(--primary) !important;
    font-weight: 600 !important;
    padding: 8px 22px !important;
    border-radius: var(--radius-sm) !important;
    box-shadow: 0 2px 8px rgba(245,166,35,0.3);
    transition: all var(--transition) !important;
}
.nav-cta:hover {
    background: var(--accent-light) !important;
    box-shadow: 0 4px 16px rgba(245,166,35,0.4);
    transform: translateY(-1px);
}
.nav-cta i { font-size: 0.85rem !important; }
.nav-toggle {
    display: none;
    font-size: 1.4rem;
    color: var(--primary);
    padding: 8px;
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}
.nav-toggle:hover { background: rgba(26,32,54,0.05); }

/* ===== Article Hero ===== */
.article-hero {
    margin-top: var(--header-height);
    padding: 80px 0 60px;
    background: var(--bg-dark);
    position: relative;
    overflow: hidden;
    min-height: 320px;
    display: flex;
    align-items: center;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: overlay;
}
.article-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(26,32,54,0.92) 0%, rgba(26,32,54,0.7) 100%);
}
.article-hero .container {
    position: relative;
    z-index: 2;
}
.article-hero-category {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(245,166,35,0.2);
    border: 1px solid rgba(245,166,35,0.3);
    color: var(--accent-light);
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 20px;
    backdrop-filter: blur(4px);
}
.article-hero-category i { font-size: 0.8rem; }
.article-hero h1 {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--text-white);
    line-height: 1.2;
    max-width: 800px;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 8px rgba(0,0,0,0.1);
}
.article-hero-meta {
    display: flex;
    align-items: center;
    gap: 24px;
    flex-wrap: wrap;
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
}
.article-hero-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-hero-meta i { font-size: 0.85rem; color: var(--accent); }

/* ===== Article Main ===== */
.article-main {
    padding: 60px 0;
}
.article-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 48px;
    align-items: start;
}
.article-content-wrap {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.article-featured-image {
    width: 100%;
    height: 420px;
    object-fit: cover;
    border-radius: 0;
    display: block;
}
.article-body {
    padding: 40px 48px;
}
.article-body .article-content {
    font-size: 1.05rem;
    line-height: 1.85;
    color: var(--text);
}
.article-body .article-content h2 {
    font-size: 1.6rem;
    margin: 40px 0 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
}
.article-body .article-content h3 {
    font-size: 1.25rem;
    margin: 32px 0 12px;
}
.article-body .article-content p {
    margin-bottom: 20px;
}
.article-body .article-content ul,
.article-body .article-content ol {
    margin: 16px 0 20px;
    padding-left: 24px;
}
.article-body .article-content ul { list-style: disc; }
.article-body .article-content ol { list-style: decimal; }
.article-body .article-content li { margin-bottom: 8px; }
.article-body .article-content blockquote {
    border-left: 4px solid var(--accent);
    padding: 16px 24px;
    margin: 24px 0;
    background: rgba(245,166,35,0.06);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-light);
}
.article-body .article-content img {
    border-radius: var(--radius-sm);
    margin: 24px 0;
    box-shadow: var(--shadow);
}
.article-body .article-content a {
    color: var(--accent-dark);
    text-decoration: underline;
    text-underline-offset: 2px;
}
.article-body .article-content a:hover { color: var(--accent); }
.article-body .article-content code {
    background: rgba(26,32,54,0.06);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: 'SF Mono', 'Fira Code', monospace;
}
.article-body .article-content pre {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 24px;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 24px 0;
    font-size: 0.9rem;
    line-height: 1.6;
}
.article-body .article-content pre code {
    background: none;
    color: inherit;
    padding: 0;
    border-radius: 0;
}

/* ===== Article Toolbar ===== */
.article-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 24px 48px;
    border-top: 1px solid var(--border-light);
    background: rgba(245,247,250,0.5);
}
.article-toolbar-left {
    display: flex;
    align-items: center;
    gap: 12px;
}
.article-toolbar-left span {
    font-size: 0.9rem;
    color: var(--text-light);
}
.article-toolbar-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.article-toolbar-btn:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(26,32,54,0.02);
    box-shadow: var(--shadow);
}
.article-toolbar-btn i { font-size: 0.85rem; }
.article-toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}
.article-toolbar-right a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--primary);
    background: var(--bg);
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.article-toolbar-right a:hover {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
}

/* ===== Sidebar ===== */
.article-sidebar {
    display: flex;
    flex-direction: column;
    gap: 32px;
}
.sidebar-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 28px;
    border: 1px solid var(--border-light);
}
.sidebar-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--border-light);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sidebar-card h3 i { color: var(--accent); font-size: 1rem; }
.sidebar-list li {
    padding: 10px 0;
    border-bottom: 1px solid var(--border-light);
}
.sidebar-list li:last-child { border-bottom: none; }
.sidebar-list a {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text);
    transition: all var(--transition);
}
.sidebar-list a:hover { color: var(--accent-dark); transform: translateX(4px); }
.sidebar-list a i { color: var(--accent); font-size: 0.8rem; width: 16px; }
.sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.sidebar-tags a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-light);
    background: var(--bg);
    border: 1px solid var(--border);
    transition: all var(--transition);
}
.sidebar-tags a:hover {
    color: var(--primary);
    border-color: var(--accent);
    background: rgba(245,166,35,0.08);
}
.sidebar-cta {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--text-white);
    border: none;
    text-align: center;
}
.sidebar-cta h3 { color: var(--text-white); border-bottom-color: rgba(255,255,255,0.15); }
.sidebar-cta h3 i { color: var(--accent); }
.sidebar-cta p { color: rgba(255,255,255,0.8); font-size: 0.95rem; margin-bottom: 20px; line-height: 1.6; }
.sidebar-cta .btn-accent {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--accent);
    box-shadow: 0 4px 16px rgba(245,166,35,0.3);
    transition: all var(--transition);
}
.sidebar-cta .btn-accent:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(245,166,35,0.4);
}

/* ===== Recommended Section ===== */
.recommended-section {
    padding: 60px 0;
    background: var(--bg);
}
.recommended-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 36px;
}
.recommended-header h2 {
    font-size: 1.6rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 10px;
}
.recommended-header h2 i { color: var(--accent); font-size: 1.3rem; }
.recommended-header a {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--accent-dark);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.recommended-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.recommend-card {
    background: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--border-light);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}
.recommend-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: var(--accent);
}
.recommend-card-img {
    height: 180px;
    background: var(--primary-light);
    position: relative;
    overflow: hidden;
}
.recommend-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 0;
    transition: transform 0.5s ease;
}
.recommend-card:hover .recommend-card-img img { transform: scale(1.05); }
.recommend-card-img .tag {
    position: absolute;
    top: 12px;
    left: 12px;
    background: var(--accent);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
}
.recommend-card-body {
    padding: 20px 24px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}
.recommend-card-body h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}
.recommend-card-body h3 a { color: var(--text); }
.recommend-card-body h3 a:hover { color: var(--accent-dark); }
.recommend-card-body p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.6;
    flex: 1;
    margin-bottom: 12px;
}
.recommend-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-light);
    padding-top: 12px;
}

/* ===== CTA Section ===== */
.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/cover no-repeat;
    opacity: 0.08;
    mix-blend-mode: overlay;
}
.cta-section .container {
    position: relative;
    z-index: 2;
    text-align: center;
}
.cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 16px;
}
.cta-section p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.7);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.6;
}
.cta-buttons {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--primary);
    background: var(--accent);
    box-shadow: 0 4px 20px rgba(245,166,35,0.3);
    transition: all var(--transition);
}
.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(245,166,35,0.4);
    color: var(--primary);
}
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    border-radius: var(--radius-sm);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-white);
    border: 2px solid rgba(255,255,255,0.3);
    transition: all var(--transition);
    background: transparent;
}
.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(245,166,35,0.08);
}

/* ===== Footer ===== */
.footer {
    background: var(--primary-dark);
    color: rgba(255,255,255,0.8);
    padding: 60px 0 0;
}
.footer .nav-brand { color: var(--text-white); margin-bottom: 12px; }
.footer .nav-brand i { color: var(--accent); }
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand p {
    font-size: 0.95rem;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    max-width: 320px;
}
.footer-col h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 8px;
}
.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.6);
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.footer-col ul li a:hover { color: var(--accent); transform: translateX(4px); }
.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    padding: 24px 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
}
.footer-links {
    display: flex;
    align-items: center;
    gap: 12px;
}
.footer-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.5);
    font-size: 1.1rem;
    transition: all var(--transition);
}
.footer-links a:hover {
    background: var(--accent);
    color: var(--primary);
    transform: translateY(-2px);
}

/* ===== 404 / Not Found ===== */
.not-found-wrap {
    padding: 60px 0;
    text-align: center;
}
.not-found-wrap .not-found-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}
.not-found-wrap h2 {
    font-size: 1.8rem;
    margin-bottom: 12px;
}
.not-found-wrap p {
    font-size: 1.05rem;
    color: var(--text-light);
    margin-bottom: 24px;
}
.not-found-wrap .btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-white);
    background: var(--primary);
    transition: all var(--transition);
}
.not-found-wrap .btn-back:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-layout { grid-template-columns: 1fr; }
    .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .recommended-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
    :root { --header-height: 64px; }
    .container { padding: 0 16px; }
    .nav-links {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        background: rgba(255,255,255,0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 16px 24px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        pointer-events: none;
        gap: 4px;
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }
    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav-links a {
        width: 100%;
        justify-content: center;
        padding: 12px 18px;
        font-size: 1rem;
    }
    .nav-links a.active::after { display: none; }
    .nav-links a.active { background: rgba(245,166,35,0.12); }
    .nav-cta { margin-top: 8px; }
    .nav-toggle { display: flex; align-items: center; justify-content: center; }
    .article-hero { padding: 60px 0 40px; min-height: 240px; }
    .article-hero h1 { font-size: 1.8rem; }
    .article-hero-meta { gap: 16px; font-size: 0.85rem; }
    .article-featured-image { height: 240px; }
    .article-body { padding: 24px 20px; }
    .article-body .article-content { font-size: 1rem; }
    .article-body .article-content h2 { font-size: 1.3rem; }
    .article-toolbar { padding: 16px 20px; flex-direction: column; align-items: flex-start; }
    .article-sidebar { grid-template-columns: 1fr; }
    .recommended-header h2 { font-size: 1.3rem; }
    .recommended-grid { grid-template-columns: 1fr; }
    .cta-section { padding: 60px 0; }
    .cta-section h2 { font-size: 1.5rem; }
    .btn-primary, .btn-outline { padding: 12px 24px; font-size: 0.95rem; width: 100%; justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
    .article-hero h1 { font-size: 1.4rem; }
    .article-hero { padding: 40px 0 30px; min-height: 200px; }
    .article-featured-image { height: 180px; }
    .article-body { padding: 20px 16px; }
    .article-toolbar { padding: 12px 16px; }
    .sidebar-card { padding: 20px; }
    .recommend-card-img { height: 140px; }
}