/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f2440;
            --secondary: #e8b84b;
            --secondary-light: #f0d080;
            --secondary-dark: #c99a30;
            --accent: #d94a4a;
            --bg: #f8f9fc;
            --bg-alt: #f0f2f7;
            --bg-card: #ffffff;
            --bg-dark: #1a1e28;
            --bg-dark-alt: #252b3a;
            --text: #1a1e28;
            --text-light: #6b7280;
            --text-inverse: #ffffff;
            --text-secondary: #e8b84b;
            --border: #e2e5ed;
            --border-light: #f0f2f7;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(26, 30, 40, 0.08);
            --shadow-lg: 0 12px 48px rgba(26, 30, 40, 0.12);
            --shadow-hover: 0 8px 32px rgba(26, 30, 40, 0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --container: 1200px;
            --nav-height: 72px;
            --spacing-section: 80px;
            --spacing-block: 48px;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-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);
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--secondary);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
        }
        button {
            cursor: pointer;
            background: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--text);
        }
        h1 {
            font-size: clamp(2.2rem, 5vw, 3.8rem);
        }
        h2 {
            font-size: clamp(1.6rem, 3.5vw, 2.6rem);
        }
        h3 {
            font-size: clamp(1.2rem, 2.5vw, 1.8rem);
        }
        h4 {
            font-size: clamp(1rem, 2vw, 1.3rem);
        }
        p {
            margin-bottom: 1rem;
            color: var(--text-light);
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-block);
        }
        .section-title h2 {
            margin-bottom: 12px;
        }
        .section-title p {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.1rem;
        }
        .text-center {
            text-align: center;
        }
        .badge {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            background: var(--secondary);
            color: var(--primary-dark);
        }

        /* ===== Header / Nav ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--nav-height);
            background: rgba(26, 30, 40, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            z-index: 1000;
            transition: var(--transition);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-inverse);
            letter-spacing: 0.5px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .logo i {
            color: var(--secondary);
            font-size: 1.2rem;
        }
        .logo:hover {
            color: var(--secondary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: rgba(255, 255, 255, 0.75);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--text-inverse);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-links a.active {
            color: var(--text-inverse);
            background: rgba(232, 184, 75, 0.18);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--secondary);
            border-radius: 4px;
        }
        .nav-cta {
            padding: 8px 24px !important;
            background: var(--secondary) !important;
            color: var(--primary-dark) !important;
            border-radius: var(--radius-sm) !important;
            font-weight: 700 !important;
        }
        .nav-cta:hover {
            background: var(--secondary-light) !important;
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text-inverse);
            padding: 8px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.06);
        }
        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.12);
        }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            background: var(--bg-dark);
            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: 0.3;
            transform: scale(1.05);
            filter: saturate(0.8);
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 40%, rgba(232, 184, 75, 0.10) 0%, transparent 60%),
                linear-gradient(180deg, rgba(26, 30, 40, 0.92) 0%, rgba(26, 30, 40, 0.70) 100%);
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            padding-top: 40px;
            padding-bottom: 60px;
        }
        .hero-content h1 {
            color: var(--text-inverse);
            margin-bottom: 20px;
            line-height: 1.15;
        }
        .hero-content h1 span {
            color: var(--secondary);
        }
        .hero-content p {
            color: rgba(255, 255, 255, 0.7);
            font-size: 1.15rem;
            max-width: 520px;
            margin-bottom: 32px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 32px;
        }
        .hero-badges .badge {
            background: rgba(232, 184, 75, 0.15);
            color: var(--secondary);
            border: 1px solid rgba(232, 184, 75, 0.2);
            padding: 6px 18px;
            font-size: 0.85rem;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            border-color: var(--secondary);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            border-color: var(--secondary-light);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 184, 75, 0.35);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-inverse);
            border-color: rgba(255, 255, 255, 0.3);
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.5);
            color: var(--text-inverse);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            padding: 28px 32px;
            background: rgba(255, 255, 255, 0.04);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
        }
        .hero-stat {
            text-align: center;
        }
        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            margin-top: 4px;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            width: 100%;
            max-width: 520px;
            transform: perspective(800px) rotateY(-4deg);
            transition: var(--transition);
        }
        .hero-visual img:hover {
            transform: perspective(800px) rotateY(0deg) scale(1.01);
        }

        /* ===== Features / 核心服务 ===== */
        .features {
            background: var(--bg);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--secondary);
        }
        .feature-icon {
            width: 60px;
            height: 60px;
            border-radius: 16px;
            background: rgba(232, 184, 75, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .feature-card h3 {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        .feature-card p {
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ===== Categories / 分类入口 ===== */
        .categories {
            background: var(--bg-alt);
        }
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .category-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .category-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .category-card-image {
            height: 200px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .category-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .category-card-image img {
            transform: scale(1.05);
        }
        .category-card-image .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(26, 30, 40, 0.6));
        }
        .category-card-body {
            padding: 24px 24px 28px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .category-card-body h3 {
            margin-bottom: 8px;
            font-size: 1.2rem;
        }
        .category-card-body p {
            font-size: 0.95rem;
            margin-bottom: 16px;
            flex: 1;
        }
        .category-card-body .btn {
            align-self: flex-start;
            padding: 8px 20px;
            font-size: 0.9rem;
        }

        /* ===== Latest Posts / 最新资讯 ===== */
        .latest-posts {
            background: var(--bg);
        }
        .posts-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 28px;
        }
        .post-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .post-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        .post-card-image {
            height: 180px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .post-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .post-card:hover .post-card-image img {
            transform: scale(1.04);
        }
        .post-card-image .post-cat {
            position: absolute;
            top: 14px;
            left: 14px;
            background: var(--secondary);
            color: var(--primary-dark);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 700;
        }
        .post-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .post-card-body h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .post-card-body h3 a {
            color: var(--text);
        }
        .post-card-body h3 a:hover {
            color: var(--primary-light);
        }
        .post-card-body .post-excerpt {
            font-size: 0.92rem;
            color: var(--text-light);
            margin-bottom: 14px;
            flex: 1;
        }
        .post-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-light);
        }
        .post-meta i {
            margin-right: 4px;
            color: var(--secondary);
        }
        .posts-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-light);
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .posts-empty i {
            font-size: 2.4rem;
            color: var(--secondary);
            margin-bottom: 16px;
            display: block;
        }

        /* ===== Stats / 数据看板 ===== */
        .stats-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .stats-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 32px;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--secondary);
            line-height: 1.2;
        }
        .stat-label {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.95rem;
            margin-top: 6px;
        }

        /* ===== Steps / 流程指引 ===== */
        .steps {
            background: var(--bg-alt);
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 28px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border);
            text-align: center;
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--secondary);
            color: var(--primary-dark);
            font-size: 1.5rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            transition: var(--transition);
        }
        .step-card:hover .step-number {
            transform: scale(1.08);
        }
        .step-card h3 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--bg);
        }
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--secondary);
        }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1.05rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            color: var(--text);
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question i {
            color: var(--secondary);
            transition: var(--transition);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .faq-question.open i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-light);
            font-size: 0.95rem;
            display: none;
            line-height: 1.7;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            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: 0.10;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 40px 0;
        }
        .cta-content h2 {
            color: var(--text-inverse);
            margin-bottom: 16px;
        }
        .cta-content p {
            color: rgba(255, 255, 255, 0.65);
            max-width: 560px;
            margin: 0 auto 32px;
            font-size: 1.1rem;
        }
        .cta-content .btn {
            padding: 16px 40px;
            font-size: 1.1rem;
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark-alt);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 48px 0 28px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 32px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer-brand .logo {
            margin-bottom: 12px;
            font-size: 1.2rem;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            max-width: 320px;
        }
        .footer-col h4 {
            color: var(--text-inverse);
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 600;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.5);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            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(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content p {
                margin: 0 auto 28px;
            }
            .hero-badges {
                justify-content: center;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                max-width: 480px;
                margin: 0 auto;
            }
            .hero-visual img {
                max-width: 400px;
                transform: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
                --spacing-section: 48px;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                width: 100%;
                background: rgba(26, 30, 40, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                pointer-events: none;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.active {
                background: rgba(232, 184, 75, 0.15);
            }
            .nav-cta {
                text-align: center;
                margin-top: 8px;
            }
            .mobile-toggle {
                display: block;
            }
            .hero {
                min-height: auto;
                padding: 100px 0 60px;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                padding: 20px;
                gap: 12px;
            }
            .hero-stat-number {
                font-size: 1.5rem;
            }
            .hero-stat-label {
                font-size: 0.75rem;
            }
            .features-grid {
                grid-template-columns: 1fr 1fr;
            }
            .categories-grid {
                grid-template-columns: 1fr;
            }
            .posts-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-number {
                font-size: 2rem;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .features-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .hero-stats {
                grid-template-columns: repeat(3, 1fr);
                padding: 14px;
                gap: 8px;
            }
            .hero-stat-number {
                font-size: 1.2rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                justify-content: center;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 16px 12px;
            }
            .category-card-image {
                height: 160px;
            }
            .post-card-image {
                height: 150px;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #1a3a6b;
            --primary-light: #2a5a9e;
            --primary-dark: #0f1f3d;
            --secondary: #e8a838;
            --secondary-light: #f0c462;
            --secondary-dark: #c78a20;
            --accent: #d94a4a;
            --bg-body: #f5f7fc;
            --bg-white: #ffffff;
            --bg-dark: #0f1f3d;
            --bg-card: #ffffff;
            --bg-section-alt: #eef1f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a5a;
            --text-muted: #7a7a8a;
            --text-light: #ffffff;
            --text-link: #2a5a9e;
            --border: #dce0e8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.12);
            --shadow-btn: 0 4px 14px rgba(26, 58, 107, 0.25);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacer: 80px;
            --spacer-sm: 48px;
            --max-width: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: var(--text-link);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }
        header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .logo:hover {
            color: var(--primary);
            opacity: 0.9;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-links a i {
            font-size: 0.9rem;
        }
        .nav-links a:hover {
            background: var(--bg-section-alt);
            color: var(--primary);
        }
        .nav-links a.active {
            background: var(--primary);
            color: var(--text-light);
        }
        .nav-links a.active:hover {
            background: var(--primary-light);
        }
        .nav-links .nav-cta {
            background: var(--secondary);
            color: var(--primary-dark);
            font-weight: 700;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-btn);
        }
        .nav-links .nav-cta:hover {
            background: var(--secondary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(232, 168, 56, 0.35);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--primary);
            cursor: pointer;
            padding: 4px;
        }

        /* ===== Page Banner ===== */
        .page-banner {
            padding: 140px 0 72px;
            background: var(--primary-dark) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            isolation: isolate;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.88) 0%, rgba(26, 58, 107, 0.72) 100%);
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-light);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .page-banner h1 i {
            color: var(--secondary);
        }
        .page-banner p {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-banner .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 10px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        .page-banner .breadcrumb a {
            color: rgba(255, 255, 255, 0.8);
        }
        .page-banner .breadcrumb a:hover {
            color: var(--secondary);
        }
        .page-banner .breadcrumb span {
            color: var(--secondary);
        }

        /* ===== Section Common ===== */
        section {
            padding: var(--spacer) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-white {
            background: var(--bg-white);
        }
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-title h2 i {
            color: var(--secondary);
        }
        .section-title p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .section-title .divider {
            width: 60px;
            height: 4px;
            background: var(--secondary);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== Cards ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            border: 1px solid var(--border);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
        }
        .card .card-body {
            padding: 24px 20px 28px;
        }
        .card .card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .card .card-body p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }
        .card .card-body .tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--bg-section-alt);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--text-muted);
            font-weight: 500;
        }
        .card .card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 8px;
        }
        .card .card-body .card-link i {
            transition: var(--transition);
        }
        .card .card-body .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== Steps ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            position: relative;
        }
        .step-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .step-card .step-num {
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 800;
            margin: 0 auto 16px;
            position: relative;
        }
        .step-card .step-num::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px dashed var(--secondary);
            opacity: 0.4;
        }
        .step-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
        }
        .step-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Comparison Table (styled) ===== */
        .comparison-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .compare-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
            text-align: center;
        }
        .compare-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .compare-card .icon-wrap {
            font-size: 2.4rem;
            color: var(--secondary);
            margin-bottom: 16px;
        }
        .compare-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .compare-card ul {
            text-align: left;
            padding: 0;
        }
        .compare-card ul li {
            padding: 6px 0;
            font-size: 0.92rem;
            color: var(--text-secondary);
            display: flex;
            align-items: flex-start;
            gap: 8px;
            border-bottom: 1px solid var(--border);
        }
        .compare-card ul li:last-child {
            border-bottom: none;
        }
        .compare-card ul li i {
            color: var(--secondary);
            margin-top: 4px;
            flex-shrink: 0;
        }
        .compare-card .badge {
            display: inline-block;
            padding: 4px 14px;
            background: var(--secondary);
            color: var(--primary-dark);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-hover);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 600;
            color: var(--primary);
            font-size: 1.05rem;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i {
            color: var(--secondary);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.show {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-dark) url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            position: relative;
            isolation: isolate;
            padding: var(--spacer) 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 31, 61, 0.9) 0%, rgba(26, 58, 107, 0.75) 100%);
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-light);
            margin-bottom: 16px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--secondary);
            color: var(--primary-dark);
            box-shadow: 0 4px 16px rgba(232, 168, 56, 0.35);
        }
        .btn-primary:hover {
            background: var(--secondary-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(232, 168, 56, 0.45);
            color: var(--primary-dark);
        }
        .btn-secondary {
            background: transparent;
            color: var(--text-light);
            border: 2px solid rgba(255, 255, 255, 0.4);
        }
        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: var(--secondary);
            color: var(--secondary);
            transform: translateY(-3px);
        }

        /* ===== Safety Tips ===== */
        .safety-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }
        .safety-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: var(--transition);
        }
        .safety-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .safety-card .icon-box {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            background: var(--bg-section-alt);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--secondary);
        }
        .safety-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 6px;
        }
        .safety-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 0;
        }
        footer .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 .footer-brand .logo {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 12px;
        }
        footer .footer-brand .logo i {
            color: var(--secondary);
        }
        footer .footer-brand p {
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            max-width: 320px;
        }
        footer .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        footer .footer-col a {
            display: block;
            padding: 6px 0;
            font-size: 0.92rem;
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition);
        }
        footer .footer-col a:hover {
            color: var(--secondary);
            padding-left: 4px;
        }
        footer .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }
        footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            flex-wrap: wrap;
            gap: 12px;
        }
        footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
        }
        footer .footer-bottom a:hover {
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            footer .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-banner h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            header .container {
                height: 64px;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                width: 100%;
                border-radius: var(--radius-sm);
            }
            .nav-links .nav-cta {
                margin-top: 4px;
                text-align: center;
                justify-content: center;
            }
            .nav-toggle {
                display: block;
            }
            .page-banner {
                padding: 120px 0 56px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner p {
                font-size: 1rem;
            }
            section {
                padding: var(--spacer-sm) 0;
            }
            .section-title h2 {
                font-size: 1.6rem;
            }
            .card-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .comparison-grid {
                grid-template-columns: 1fr;
            }
            .safety-grid {
                grid-template-columns: 1fr;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .page-banner p {
                font-size: 0.92rem;
            }
            .section-title h2 {
                font-size: 1.4rem;
            }
            .card .card-body {
                padding: 18px 16px 22px;
            }
            .step-card {
                padding: 24px 16px;
            }
            .compare-card {
                padding: 24px 16px;
            }
            .safety-card {
                flex-direction: column;
                padding: 20px 16px;
            }
            .safety-card .icon-box {
                width: 44px;
                height: 44px;
                font-size: 1.3rem;
            }
            .faq-question {
                padding: 16px 18px;
                font-size: 0.95rem;
            }
            .faq-answer {
                padding: 0 18px 16px;
                font-size: 0.9rem;
            }
            .cta-section .btn-group {
                flex-direction: column;
                align-items: center;
            }
        }

/* roulang page: article */
*,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        :root {
            --primary: #1a3a5c;
            --primary-light: #2a5a8c;
            --primary-dark: #0f253d;
            --accent: #e04f2a;
            --accent-hover: #c4421f;
            --accent-light: #fce8e2;
            --bg: #f5f7fa;
            --bg-card: #ffffff;
            --bg-dark: #1a2a3a;
            --text: #2c3e50;
            --text-light: #6b7a8a;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --shadow: 0 4px 24px rgba(26, 58, 92, 0.10);
            --shadow-lg: 0 12px 48px rgba(26, 58, 92, 0.18);
            --shadow-hover: 0 8px 32px rgba(26, 58, 92, 0.16);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --max-width: 1200px;
            --header-height: 72px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font);
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: var(--primary-light);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--accent);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 20px rgba(26, 58, 92, 0.08);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .logo i {
            font-size: 1.5rem;
            color: var(--accent);
        }
        .logo:hover {
            color: var(--primary);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text);
            text-decoration: none;
            transition: background var(--transition), color var(--transition);
            white-space: nowrap;
        }
        .nav-links a i {
            font-size: 0.9rem;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .nav-links a:hover {
            background: var(--accent-light);
            color: var(--accent);
        }
        .nav-links a:hover i {
            color: var(--accent);
        }
        .nav-links a.active {
            background: var(--primary);
            color: var(--text-white);
        }
        .nav-links a.active i {
            color: var(--text-white);
        }
        .nav-links a.nav-cta {
            background: var(--accent);
            color: var(--text-white);
            padding: 8px 24px;
            border-radius: 50px;
            font-weight: 600;
            margin-left: 8px;
        }
        .nav-links a.nav-cta i {
            color: var(--text-white);
        }
        .nav-links a.nav-cta:hover {
            background: var(--accent-hover);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(224, 79, 42, 0.35);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: background var(--transition);
        }
        .menu-toggle:hover {
            background: var(--accent-light);
        }
        .menu-toggle span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .menu-toggle.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .menu-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        @media (max-width: 868px) {
            .menu-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--header-height);
                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 28px;
                gap: 4px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 32px rgba(26, 58, 92, 0.12);
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            .nav-links a {
                width: 100%;
                padding: 12px 18px;
                font-size: 1rem;
                border-radius: var(--radius-sm);
            }
            .nav-links a.nav-cta {
                margin-left: 0;
                margin-top: 8px;
                text-align: center;
                justify-content: center;
            }
        }

        /* ===== Article Hero / Banner ===== */
        .article-hero {
            margin-top: var(--header-height);
            position: relative;
            min-height: 320px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--primary-dark) url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 80px 24px 60px;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 37, 61, 0.88) 0%, rgba(26, 58, 92, 0.78) 100%);
            z-index: 1;
        }
        .article-hero .hero-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            width: 100%;
        }
        .article-hero .hero-category {
            display: inline-block;
            background: var(--accent);
            color: var(--text-white);
            padding: 4px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 18px;
            text-transform: uppercase;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-hero .hero-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.95rem;
        }
        .article-hero .hero-meta i {
            margin-right: 6px;
            color: var(--accent);
        }
        @media (max-width: 768px) {
            .article-hero {
                min-height: 240px;
                padding: 60px 16px 40px;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-hero .hero-meta {
                gap: 14px;
                font-size: 0.85rem;
                flex-direction: column;
            }
        }
        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 48px 0 60px;
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 40px 48px;
            overflow: hidden;
        }
        .article-body .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 32px;
            object-fit: cover;
            max-height: 420px;
            box-shadow: 0 4px 20px rgba(26, 58, 92, 0.10);
        }
        .article-body .content {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content p {
            margin-bottom: 1.4em;
        }
        .article-body .content h2,
        .article-body .content h3 {
            margin-top: 1.8em;
            margin-bottom: 0.8em;
            color: var(--primary);
            font-weight: 700;
        }
        .article-body .content h2 {
            font-size: 1.6rem;
        }
        .article-body .content h3 {
            font-size: 1.25rem;
        }
        .article-body .content ul,
        .article-body .content ol {
            margin-bottom: 1.4em;
            padding-left: 24px;
        }
        .article-body .content li {
            margin-bottom: 0.4em;
        }
        .article-body .content a {
            color: var(--accent);
            font-weight: 500;
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body .content a:hover {
            color: var(--accent-hover);
        }
        .article-body .content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 24px;
            margin: 1.6em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text);
            font-style: normal;
        }
        .article-body .content img {
            border-radius: var(--radius-sm);
            margin: 1.6em 0;
            box-shadow: 0 4px 20px rgba(26, 58, 92, 0.08);
        }
        .article-body .content code {
            background: #f1f3f5;
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }
        .article-body .content pre {
            background: var(--primary-dark);
            color: #e8edf2;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .article-body .content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }
        .article-body .content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6em 0;
            font-size: 0.95rem;
        }
        .article-body .content table th {
            background: var(--primary);
            color: var(--text-white);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
        }
        .article-body .content table td {
            padding: 10px 16px;
            border-bottom: 1px solid var(--border);
        }
        .article-body .content table tr:hover td {
            background: #f8faff;
        }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            padding: 28px 24px;
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--accent);
        }
        .sidebar-card ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .sidebar-card ul li a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            color: var(--text);
            transition: background var(--transition), color var(--transition);
        }
        .sidebar-card ul li a i {
            font-size: 0.8rem;
            color: var(--text-light);
            transition: color var(--transition);
        }
        .sidebar-card ul li a:hover {
            background: var(--accent-light);
            color: var(--accent);
        }
        .sidebar-card ul li a:hover i {
            color: var(--accent);
        }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            color: var(--text-white);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
        }
        .sidebar-cta h3 {
            color: var(--text-white);
            font-size: 1.15rem;
            margin-bottom: 12px;
        }
        .sidebar-cta p {
            font-size: 0.9rem;
            opacity: 0.85;
            margin-bottom: 20px;
        }
        .sidebar-cta .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--text-white);
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .sidebar-cta .btn:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(224, 79, 42, 0.40);
            color: var(--text-white);
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .article-body {
                padding: 28px 24px;
            }
        }
        @media (max-width: 520px) {
            .article-body {
                padding: 20px 16px;
            }
            .article-body .content {
                font-size: 0.98rem;
            }
        }

        /* ===== Article Nav Bottom ===== */
        .article-nav-bottom {
            margin-top: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-nav-bottom a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 500;
            font-size: 0.95rem;
            background: var(--bg);
            color: var(--text);
            transition: background var(--transition), color var(--transition), transform var(--transition);
        }
        .article-nav-bottom a i {
            font-size: 0.9rem;
        }
        .article-nav-bottom a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .article-nav-bottom a.back-home {
            background: var(--accent-light);
            color: var(--accent);
        }
        .article-nav-bottom a.back-home:hover {
            background: var(--accent);
            color: var(--text-white);
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            padding: 64px 24px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::after {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.08;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 14px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-group {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-section .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--accent);
            color: var(--text-white);
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            border: none;
            cursor: pointer;
        }
        .cta-section .btn-primary:hover {
            background: var(--accent-hover);
            transform: translateY(-3px);
            box-shadow: 0 8px 28px rgba(224, 79, 42, 0.45);
            color: var(--text-white);
        }
        .cta-section .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: transparent;
            color: var(--text-white);
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            border: 2px solid rgba(255, 255, 255, 0.4);
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }
        .cta-section .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--text-white);
            transform: translateY(-2px);
            color: var(--text-white);
        }
        @media (max-width: 768px) {
            .cta-section {
                padding: 48px 16px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.98rem;
            }
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.8);
            padding: 56px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .logo {
            color: var(--text-white);
            font-size: 1.3rem;
            margin-bottom: 14px;
        }
        .footer-brand .logo i {
            color: var(--accent);
        }
        .footer-brand p {
            font-size: 0.92rem;
            line-height: 1.7;
            opacity: 0.75;
            max-width: 360px;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            padding: 5px 0;
            transition: color var(--transition), padding-left var(--transition);
        }
        .footer-col a i {
            margin-right: 8px;
            width: 18px;
            text-align: center;
        }
        .footer-col a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 20px 0;
            font-size: 0.85rem;
            opacity: 0.6;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }
        @media (max-width: 868px) {
            .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;
            }
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 24px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }
        .not-found-box i {
            font-size: 3.5rem;
            color: var(--text-light);
            margin-bottom: 20px;
            opacity: 0.5;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-box p {
            font-size: 1.05rem;
            color: var(--text-light);
            margin-bottom: 24px;
        }
        .not-found-box .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: var(--text-white);
            padding: 12px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .not-found-box .btn-home:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            color: var(--text-white);
        }

        /* ===== Tags ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.82rem;
            color: var(--text-light);
            transition: background var(--transition), color var(--transition);
        }
        .article-tags .tag i {
            font-size: 0.75rem;
            color: var(--accent);
        }
        .article-tags .tag:hover {
            background: var(--accent-light);
            color: var(--accent);
        }

        /* ===== Loading / Misc ===== */
        .text-muted {
            color: var(--text-light);
        }
        .mb-1 {
            margin-bottom: 0.5rem;
        }
        .mb-2 {
            margin-bottom: 1rem;
        }
        .mb-3 {
            margin-bottom: 1.5rem;
        }

        /* ===== Responsive fine-tune ===== */
        @media (max-width: 1024px) {
            .article-hero h1 {
                font-size: 2.2rem;
            }
        }
        @media (max-width: 768px) {
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-nav-bottom {
                flex-direction: column;
                align-items: stretch;
            }
            .article-nav-bottom a {
                justify-content: center;
            }
        }
        @media (max-width: 520px) {
            .article-hero {
                min-height: 200px;
                padding: 50px 16px 32px;
            }
            .article-hero h1 {
                font-size: 1.4rem;
            }
            .article-hero .hero-meta {
                font-size: 0.8rem;
                gap: 10px;
            }
            .article-body {
                padding: 16px 12px;
                border-radius: var(--radius-sm);
            }
            .article-body .content {
                font-size: 0.95rem;
                line-height: 1.8;
            }
            .sidebar-card {
                padding: 20px 16px;
            }
            .cta-section h2 {
                font-size: 1.3rem;
            }
            .cta-section .btn-primary {
                padding: 12px 24px;
                font-size: 0.95rem;
            }
        }

        /* focus & accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 3px;
        }
        .nav-links a:focus-visible {
            outline-offset: 0;
        }

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a56db;
            --primary-dark: #0f3a8e;
            --primary-light: #3b82f6;
            --primary-gradient: linear-gradient(135deg, #1a56db 0%, #0f3a8e 100%);
            --secondary: #06b6d4;
            --secondary-light: #22d3ee;
            --accent: #f59e0b;
            --bg-white: #ffffff;
            --bg-light: #f8fafc;
            --bg-dark: #0b1120;
            --bg-section: #f1f5f9;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-light: #94a3b8;
            --text-white: #ffffff;
            --border: #e2e8f0;
            --border-light: #f1f5f9;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
            --shadow-lg: 0 12px 48px rgba(15, 23, 42, 0.12);
            --shadow-hover: 0 20px 60px rgba(15, 23, 42, 0.16);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --max-width: 1200px;
            --nav-height: 72px;
            --spacing-section: 100px;
            --spacing-block: 64px;
        }

        /* ===== 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-family);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
            padding-top: var(--nav-height);
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: 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-primary);
        }

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

        /* ===== Header / Nav ===== */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border);
            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: 22px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 26px;
        }
        .logo:hover {
            color: var(--primary);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-links a i {
            font-size: 14px;
        }
        .nav-links a:hover {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.06);
        }
        .nav-links a.active {
            color: var(--primary);
            background: rgba(26, 86, 219, 0.10);
            font-weight: 600;
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }
        .nav-links a.nav-cta {
            background: var(--primary);
            color: #fff;
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.30);
        }
        .nav-links a.nav-cta:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 6px 24px rgba(26, 86, 219, 0.40);
        }
        .nav-links a.nav-cta::after {
            display: none;
        }

        /* 移动端汉堡 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 6px;
            border-radius: 6px;
            transition: var(--transition);
            background: none;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero / Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 0 72px;
            background: var(--primary-gradient);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            mix-blend-mode: overlay;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            right: 0;
            height: 80px;
            background: linear-gradient(to top, var(--bg-white), transparent);
        }
        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .page-banner h1 {
            font-size: 44px;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -1px;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.15);
        }
        .page-banner p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }
        .page-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.18);
            backdrop-filter: blur(8px);
            padding: 6px 18px;
            border-radius: 40px;
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 20px;
            border: 1px solid rgba(255, 255, 255, 0.20);
        }
        .page-banner .banner-badge i {
            font-size: 14px;
        }

        /* ===== 板块通用 ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-bg {
            background: var(--bg-section);
        }
        .section-dark {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark .section-subtitle {
            color: var(--text-white);
        }
        .section-dark .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section-header h2 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 12px;
        }
        .section-header .section-subtitle {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-header .section-line {
            width: 56px;
            height: 4px;
            background: var(--primary);
            border-radius: 4px;
            margin: 16px auto 0;
        }

        /* ===== 卡片网格 ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card-grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .card-grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--bg-white);
            border-radius: var(--radius);
            padding: 32px 28px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        .card .card-icon {
            font-size: 36px;
            color: var(--primary);
            margin-bottom: 18px;
            display: inline-block;
        }
        .card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .card p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            background: rgba(26, 86, 219, 0.08);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 16px;
            font-weight: 600;
            color: var(--primary);
            font-size: 15px;
        }
        .card .card-link i {
            font-size: 13px;
            transition: var(--transition);
        }
        .card .card-link:hover i {
            transform: translateX(4px);
        }

        /* 深色卡片 */
        .card-dark {
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(255, 255, 255, 0.10);
            backdrop-filter: blur(10px);
        }
        .card-dark h3 {
            color: #fff;
        }
        .card-dark p {
            color: rgba(255, 255, 255, 0.70);
        }
        .card-dark .card-icon {
            color: var(--secondary-light);
        }
        .card-dark .card-tag {
            background: rgba(6, 182, 212, 0.18);
            color: var(--secondary-light);
        }

        /* ===== 图文区块 ===== */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }
        .feature-row.reverse {
            direction: rtl;
        }
        .feature-row.reverse>* {
            direction: ltr;
        }
        .feature-image img {
            width: 100%;
            border-radius: var(--radius);
            box-shadow: var(--shadow-lg);
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .feature-content h3 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.3px;
        }
        .feature-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }
        .feature-content .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-content .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-secondary);
        }
        .feature-content .feature-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        /* ===== 数据/统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
        }
        .stat-item {
            text-align: center;
            padding: 32px 16px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 255, 255, 0.10);
            transform: translateY(-4px);
        }
        .stat-item .stat-number {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .stat-item .stat-number span {
            color: var(--secondary-light);
        }
        .stat-item .stat-label {
            font-size: 15px;
            color: rgba(255, 255, 255, 0.70);
            margin-top: 8px;
        }
        .stat-item .stat-icon {
            font-size: 28px;
            color: var(--secondary-light);
            margin-bottom: 12px;
        }

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .step-item {
            text-align: center;
            padding: 28px 20px;
            position: relative;
        }
        .step-item .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 800;
            margin: 0 auto 18px;
            box-shadow: 0 8px 28px rgba(26, 86, 219, 0.25);
        }
        .step-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .step-item::after {
            content: '→';
            position: absolute;
            right: -18px;
            top: 32px;
            font-size: 24px;
            color: var(--primary-light);
            font-weight: 300;
        }
        .step-item:last-child::after {
            display: none;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
        }
        .faq-question {
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            background: none;
            width: 100%;
            text-align: left;
            gap: 12px;
        }
        .faq-question i {
            font-size: 18px;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .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;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-gradient);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-section .container {
            position: relative;
            z-index: 2;
        }
        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .cta-section p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 560px;
            margin: 0 auto 32px;
        }
        .cta-section .btn-group {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }
        .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
            color: var(--primary-dark);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.50);
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 标签 / 徽章 ===== */
        .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 500;
            background: rgba(26, 86, 219, 0.08);
            color: var(--primary);
        }
        .tag-secondary {
            background: rgba(6, 182, 212, 0.12);
            color: var(--secondary);
        }
        .tag-accent {
            background: rgba(245, 158, 11, 0.14);
            color: var(--accent);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 12px;
            border-radius: 40px;
            font-size: 12px;
            font-weight: 600;
            background: rgba(26, 86, 219, 0.08);
            color: var(--primary);
        }

        /* ===== 列表样式 ===== */
        .icon-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .icon-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .icon-list li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* ===== 分隔线 ===== */
        .divider {
            width: 100%;
            height: 1px;
            background: var(--border);
            margin: 40px 0;
        }
        .divider-light {
            background: rgba(255, 255, 255, 0.10);
        }

        /* ===== 内容区块列表 ===== */
        .resource-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .resource-item {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 20px 24px;
            background: var(--bg-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .resource-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        .resource-item .ri-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(26, 86, 219, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--primary);
            flex-shrink: 0;
        }
        .resource-item .ri-content h4 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .resource-item .ri-content p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* ===== Footer ===== */
        footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.80);
            padding: 56px 0 0;
        }
        footer .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 .footer-brand .logo {
            color: #fff;
            margin-bottom: 16px;
            font-size: 20px;
        }
        footer .footer-brand .logo i {
            color: var(--secondary-light);
        }
        footer .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
            line-height: 1.7;
        }
        footer .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
        }
        footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.55);
            padding: 5px 0;
            transition: var(--transition);
        }
        footer .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }
        footer .footer-col a i {
            width: 20px;
            margin-right: 6px;
        }
        footer .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.40);
            flex-wrap: wrap;
            gap: 12px;
        }
        footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.50);
        }
        footer .footer-bottom a:hover {
            color: #fff;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .step-item::after {
                display: none;
            }
            .feature-row {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .feature-row.reverse {
                direction: ltr;
            }
            footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .resource-list {
                grid-template-columns: 1fr;
            }
            :root {
                --spacing-section: 72px;
            }
            .page-banner h1 {
                font-size: 34px;
            }
            .section-header h2 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(255, 255, 255, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 4px;
                box-shadow: 0 20px 48px rgba(0, 0, 0, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid var(--border);
                align-items: stretch;
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
            }
            .nav-links a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 16px;
            }
            .nav-links a.active::after {
                display: none;
            }
            .nav-links a.nav-cta {
                text-align: center;
                margin-top: 8px;
            }

            .card-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .card-grid-2 {
                grid-template-columns: 1fr;
            }
            .card-grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .page-banner {
                padding: 56px 0 48px;
                min-height: 240px;
            }
            .page-banner h1 {
                font-size: 28px;
            }
            .page-banner p {
                font-size: 16px;
            }
            :root {
                --spacing-section: 56px;
                --spacing-block: 40px;
            }
            .section-header h2 {
                font-size: 24px;
            }
            .section-header {
                margin-bottom: 36px;
            }
            .cta-section h2 {
                font-size: 28px;
            }
            footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .stat-item .stat-number {
                font-size: 34px;
            }
            .feature-content h3 {
                font-size: 22px;
            }
            .resource-item {
                padding: 16px 18px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .card-grid-4 {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-item .stat-number {
                font-size: 28px;
            }
            .btn {
                padding: 12px 24px;
                font-size: 15px;
                width: 100%;
                justify-content: center;
            }
            .cta-section .btn-group {
                flex-direction: column;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .logo {
                font-size: 18px;
            }
            .logo i {
                font-size: 20px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .section-header h2 {
                font-size: 22px;
            }
        }