/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a6c;
            --primary-light: #2c3e8f;
            --primary-dark: #0f1a3e;
            --secondary: #4a90d9;
            --accent: #f0a500;
            --accent-light: #ffbe2e;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f1a3e;
            --bg-section-alt: #f0f4f8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-muted: #8a8aaa;
            --text-light: #f8fafc;
            --border-color: #e2e8f0;
            --border-light: #f0f2f5;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 24px 60px rgba(0, 0, 0, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --spacing-section: 5rem;
            --spacing-block: 3rem;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background-color: var(--bg-body);
            overflow-x: hidden;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        /* ===== 容器 ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 1rem;
            }
            :root {
                --spacing-section: 3rem;
                --spacing-block: 2rem;
            }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header .navbar {
            padding: 0.75rem 0;
        }

        .site-header .navbar-brand {
            font-weight: 700;
            font-size: 1.35rem;
            letter-spacing: -0.01em;
            color: var(--primary);
            padding: 0.25rem 0;
            position: relative;
        }
        .site-header .navbar-brand:hover {
            color: var(--primary-light);
        }
        .site-header .navbar-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            margin-left: 4px;
            vertical-align: middle;
        }

        .site-header .nav-link {
            font-size: 0.925rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.5rem 1rem !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .site-header .nav-link:hover {
            color: var(--primary);
            background: rgba(26, 42, 108, 0.04);
        }
        .site-header .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 1rem;
            right: 1rem;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
        }

        .site-header .navbar-toggler {
            border: none;
            padding: 0.4rem 0.5rem;
            color: var(--text-primary);
            font-size: 1.3rem;
        }
        .site-header .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.15);
        }

        @media (max-width: 991.98px) {
            .site-header .navbar-collapse {
                background: var(--bg-card);
                border-radius: var(--radius-md);
                padding: 0.75rem;
                margin-top: 0.5rem;
                box-shadow: var(--shadow-lg);
                border: 1px solid var(--border-color);
            }
            .site-header .nav-link.active::after {
                display: none;
            }
            .site-header .nav-link.active {
                background: rgba(26, 42, 108, 0.06);
                border-radius: var(--radius-sm);
            }
        }

        /* ===== Hero ===== */
        .hero-section {
            position: relative;
            padding: 5rem 0 4.5rem;
            background: linear-gradient(145deg, #f0f4ff 0%, #f8fafc 50%, #eef2f9 100%);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(74, 144, 217, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            bottom: -20%;
            left: -5%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(240, 165, 0, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-section .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(26, 42, 108, 0.08);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            padding: 0.35rem 1rem;
            border-radius: 50px;
            margin-bottom: 1.25rem;
            border: 1px solid rgba(26, 42, 108, 0.10);
        }
        .hero-section .hero-badge i {
            font-size: 0.9rem;
        }

        .hero-section h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--primary);
            margin-bottom: 1rem;
        }
        .hero-section h1 .highlight {
            color: var(--accent);
            position: relative;
        }
        .hero-section .lead {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 2rem;
        }

        .hero-section .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            font-size: 1.05rem;
            padding: 0.85rem 2.2rem;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(26, 42, 108, 0.25);
        }
        .hero-section .btn-download:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(26, 42, 108, 0.30);
            color: #fff;
        }
        .hero-section .btn-download:active {
            transform: translateY(0);
        }
        .hero-section .btn-download i {
            font-size: 1.2rem;
        }

        .hero-section .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--text-secondary);
            font-weight: 500;
            padding: 0.85rem 1.8rem;
            border-radius: 50px;
            border: 1.5px solid var(--border-color);
            background: transparent;
            transition: var(--transition);
        }
        .hero-section .btn-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(26, 42, 108, 0.04);
        }

        .hero-section .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2.5rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
        }
        .hero-section .hero-stats .stat-item {
            text-align: left;
        }
        .hero-section .hero-stats .stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .hero-section .hero-stats .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 3.5rem 0 3rem;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .lead {
                font-size: 1rem;
            }
            .hero-section .hero-stats {
                gap: 1.5rem;
                flex-wrap: wrap;
            }
            .hero-section .hero-stats .stat-number {
                font-size: 1.3rem;
            }
        }
        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.7rem;
            }
            .hero-section .btn-download,
            .hero-section .btn-ghost {
                width: 100%;
                justify-content: center;
            }
            .hero-section .hero-stats {
                flex-direction: column;
                gap: 0.8rem;
            }
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            color: var(--primary);
            margin-bottom: 0.75rem;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 2.5rem;
            line-height: 1.7;
        }
        .section-divider {
            width: 48px;
            height: 3.5px;
            background: var(--accent);
            border-radius: 8px;
            margin: 0 auto 1.5rem;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 2rem;
            }
        }

        /* ===== 卡片通用 ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
        }
        .card-custom:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .card-custom .card-body {
            padding: 1.75rem;
        }
        .card-custom .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            background: var(--primary);
            margin-bottom: 1rem;
        }
        .card-custom .card-title {
            font-size: 1.15rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .card-custom .card-text {
            font-size: 0.925rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== 核心优势 ===== */
        .features-grid .card-custom {
            height: 100%;
            padding: 0.25rem;
        }
        .features-grid .card-custom .card-body {
            padding: 2rem 1.75rem;
        }
        .features-grid .card-icon {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: var(--radius-sm);
        }

        /* ===== 使用流程 ===== */
        .steps-section .step-item {
            position: relative;
            padding: 2rem 1.5rem;
            text-align: center;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .steps-section .step-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .steps-section .step-number {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: 1.2rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 1.25rem;
        }
        .steps-section .step-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
        }
        .steps-section .step-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .steps-section .step-connector {
            display: none;
        }
        @media (min-width: 768px) {
            .steps-section .step-connector {
                display: flex;
                align-items: center;
                justify-content: center;
                font-size: 1.5rem;
                color: var(--border-color);
            }
        }

        /* ===== 最新资讯 ===== */
        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            overflow: hidden;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .news-card .news-body {
            padding: 1.5rem;
        }
        .news-card .news-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(26, 42, 108, 0.08);
            padding: 0.2rem 0.75rem;
            border-radius: 50px;
            margin-bottom: 0.75rem;
            border: 1px solid rgba(26, 42, 108, 0.10);
        }
        .news-card .news-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 0.5rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card .news-title a {
            color: inherit;
        }
        .news-card .news-title a:hover {
            color: var(--primary);
        }
        .news-card .news-excerpt {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 0.75rem;
        }
        .news-card .news-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .news-card .news-meta i {
            margin-right: 0.25rem;
        }

        /* ===== 分类入口 ===== */
        .category-card {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-xl);
            border-color: transparent;
            background: linear-gradient(145deg, var(--bg-card), #f0f4ff);
        }
        .category-card .cat-icon {
            width: 64px;
            height: 64px;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 1.8rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.25rem;
            transition: var(--transition);
        }
        .category-card:hover .cat-icon {
            transform: scale(1.05);
        }
        .category-card .cat-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
        }
        .category-card .cat-desc {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 260px;
        }
        .category-card .cat-arrow {
            margin-top: 1rem;
            font-size: 1.3rem;
            color: var(--primary);
            opacity: 0.4;
            transition: var(--transition);
        }
        .category-card:hover .cat-arrow {
            opacity: 1;
            transform: translateX(4px);
        }

        /* ===== 数据统计 ===== */
        .stats-section {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
            color: #fff;
            padding: 4.5rem 0;
        }
        .stats-section .stat-item {
            text-align: center;
            padding: 1.5rem 1rem;
        }
        .stats-section .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.1;
            letter-spacing: -0.02em;
            margin-bottom: 0.3rem;
        }
        .stats-section .stat-label {
            font-size: 0.95rem;
            font-weight: 400;
            opacity: 0.8;
        }

        @media (max-width: 768px) {
            .stats-section .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-section .accordion-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 0.75rem;
            background: var(--bg-card);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }
        .faq-section .accordion-item:hover {
            box-shadow: var(--shadow-md);
        }
        .faq-section .accordion-button {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--bg-card);
            padding: 1.25rem 1.5rem;
            border: none;
            box-shadow: none;
        }
        .faq-section .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: var(--bg-card);
            box-shadow: none;
        }
        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(26, 42, 108, 0.12);
        }
        .faq-section .accordion-button::after {
            background-size: 1rem;
            opacity: 0.6;
        }
        .faq-section .accordion-body {
            padding: 0 1.5rem 1.25rem;
            font-size: 0.925rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 4.5rem 0;
            color: #fff;
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2.2rem;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 540px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.1rem;
            padding: 0.9rem 2.5rem;
            border-radius: 50px;
            border: none;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(240, 165, 0, 0.35);
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(240, 165, 0, 0.40);
            color: var(--primary-dark);
        }
        .cta-section .btn-cta:active {
            transform: translateY(0);
        }
        .cta-section .btn-cta i {
            font-size: 1.2rem;
        }

        @media (max-width: 768px) {
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 3.5rem 0 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .site-footer .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 0.5rem;
            display: inline-block;
        }
        .site-footer .footer-brand .brand-dot {
            display: inline-block;
            width: 7px;
            height: 7px;
            background: var(--accent);
            border-radius: 50%;
            margin-left: 3px;
            vertical-align: middle;
        }
        .site-footer .footer-desc {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 320px;
            line-height: 1.7;
        }
        .site-footer .footer-heading {
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: 0.02em;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 0.5rem;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.875rem;
            transition: var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            padding-left: 3px;
        }
        .site-footer .footer-bottom {
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
            text-align: center;
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.45);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 2.5rem 0 1.5rem;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
        }

        /* ===== 按钮通用 ===== */
        .btn-outline-primary-custom {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
            font-weight: 600;
            padding: 0.6rem 1.5rem;
            border-radius: 50px;
            transition: var(--transition);
        }
        .btn-outline-primary-custom:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(26, 42, 108, 0.20);
        }

        /* ===== 辅助 ===== */
        .text-accent {
            color: var(--accent);
        }
        .bg-soft-primary {
            background: rgba(26, 42, 108, 0.04);
        }
        .gap-section {
            gap: 2rem 1.5rem;
        }

        /* ===== 空状态 ===== */
        .empty-state {
            text-align: center;
            padding: 3rem 1.5rem;
            color: var(--text-muted);
        }
        .empty-state i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0.4;
        }
        .empty-state p {
            font-size: 0.95rem;
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-body);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--border-color);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--text-muted);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 576px) {
            .hero-section .hero-stats .stat-item {
                flex: 1 1 40%;
            }
            .news-card .news-body {
                padding: 1.25rem;
            }
            .category-card {
                padding: 2rem 1.5rem;
            }
        }

/* roulang page: article */
:root {
            --primary: #1a1a2e;
            --primary-light: #2d2d4a;
            --primary-dark: #0f0f1a;
            --accent: #e94560;
            --accent-light: #ff6b81;
            --accent-dark: #c2314a;
            --gold: #f5a623;
            --gold-light: #ffd166;
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #16213e;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #8a8aaa;
            --text-white: #f0f0f5;
            --border-color: #e8e8f0;
            --border-light: #f0f0f8;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
            --shadow: 0 8px 32px rgba(26,26,46,0.08);
            --shadow-lg: 0 16px 48px rgba(26,26,46,0.12);
            --shadow-accent: 0 4px 20px rgba(233,69,96,0.25);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            margin: 0;
            padding: 0;
        }

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

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

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: box-shadow var(--transition);
        }
        .site-header.scrolled {
            box-shadow: 0 2px 24px rgba(26, 26, 46, 0.08);
        }

        .navbar {
            padding: 12px 0;
            background: transparent !important;
        }

        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary) !important;
            letter-spacing: -0.02em;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .navbar-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            margin-left: 2px;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.6; transform: scale(0.8); }
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 18px !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary) !important;
            background: rgba(26, 26, 46, 0.04);
        }
        .navbar-nav .nav-link.active {
            color: var(--accent) !important;
            background: rgba(233, 69, 96, 0.07);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }

        .navbar-toggler {
            border: none;
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 1.4rem;
            background: transparent;
            transition: background var(--transition);
        }
        .navbar-toggler:hover {
            background: rgba(26, 26, 46, 0.05);
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }

        /* ===== Hero (article) ===== */
        .article-hero {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 60px 0 50px;
            color: var(--text-white);
            position: relative;
            overflow: hidden;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(233, 69, 96, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(245, 166, 35, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-hero .container-custom {
            position: relative;
            z-index: 1;
        }
        .article-hero .breadcrumb-nav {
            font-size: 0.9rem;
            margin-bottom: 16px;
            opacity: 0.75;
        }
        .article-hero .breadcrumb-nav a {
            color: var(--gold-light);
            transition: opacity var(--transition);
        }
        .article-hero .breadcrumb-nav a:hover {
            opacity: 0.8;
        }
        .article-hero .breadcrumb-nav span {
            color: var(--text-white);
        }
        .article-hero h1 {
            font-size: 2.2rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
            margin-bottom: 14px;
            max-width: 800px;
        }
        .article-hero .meta-line {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.95rem;
            opacity: 0.85;
            margin-top: 8px;
        }
        .article-hero .meta-line i {
            margin-right: 6px;
            opacity: 0.7;
        }
        .article-hero .category-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 2px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.3px;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 50px 0 60px;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 40px 44px;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text-primary);
        }
        .article-body h2,
        .article-body h3 {
            margin-top: 32px;
            margin-bottom: 14px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .article-body h2 {
            font-size: 1.6rem;
            border-bottom: 2px solid var(--border-light);
            padding-bottom: 8px;
        }
        .article-body h3 {
            font-size: 1.25rem;
        }
        .article-body p {
            margin-bottom: 18px;
        }
        .article-body ul,
        .article-body ol {
            margin-bottom: 18px;
            padding-left: 24px;
        }
        .article-body li {
            margin-bottom: 6px;
        }
        .article-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-body a:hover {
            color: var(--accent-dark);
        }
        .article-body blockquote {
            border-left: 4px solid var(--accent);
            padding: 12px 20px;
            margin: 24px 0;
            background: rgba(233, 69, 96, 0.04);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body img {
            border-radius: var(--radius);
            margin: 24px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            background: rgba(26, 26, 46, 0.06);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent-dark);
        }
        .article-body pre {
            background: var(--primary);
            color: #e8e8f0;
            padding: 20px 24px;
            border-radius: var(--radius);
            overflow-x: auto;
            font-size: 0.9rem;
            line-height: 1.6;
            margin: 24px 0;
        }
        .article-body pre code {
            background: transparent;
            padding: 0;
            color: inherit;
        }

        .article-tags {
            margin-top: 36px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .article-tags .tag {
            display: inline-block;
            background: rgba(26, 26, 46, 0.05);
            color: var(--text-secondary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--accent);
            color: #fff;
        }

        .article-nav-links {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-nav-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--text-secondary);
            font-weight: 500;
            transition: color var(--transition);
        }
        .article-nav-links a:hover {
            color: var(--accent);
        }

        /* ===== Related / Sidebar ===== */
        .related-section {
            padding: 60px 0 50px;
            background: var(--bg-body);
        }
        .related-section .section-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 32px;
            letter-spacing: -0.02em;
        }
        .related-section .section-title span {
            color: var(--accent);
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            padding: 24px 28px;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            display: block;
            color: var(--text-primary);
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: transparent;
            color: var(--text-primary);
        }
        .related-card .related-cat {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 600;
            letter-spacing: 0.3px;
            text-transform: uppercase;
        }
        .related-card h5 {
            font-size: 1.1rem;
            font-weight: 600;
            margin: 8px 0 6px;
            line-height: 1.4;
        }
        .related-card p {
            font-size: 0.92rem;
            color: var(--text-light);
            margin: 0;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            padding: 56px 0;
            text-align: center;
            color: var(--text-white);
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .cta-section p {
            opacity: 0.8;
            max-width: 600px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
        }
        .cta-section .btn-cta {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 14px 44px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: var(--shadow-accent);
            border: none;
        }
        .cta-section .btn-cta:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 8px 32px rgba(233, 69, 96, 0.35);
            color: #fff;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            color: var(--text-white);
            padding: 48px 0 28px;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-bottom: 12px;
        }
        .footer-brand:hover {
            color: #fff;
        }
        .footer-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        .footer-desc {
            font-size: 0.92rem;
            opacity: 0.7;
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-heading {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.92rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            margin-top: 36px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.85rem;
            opacity: 0.55;
            text-align: center;
        }

        /* ===== Not Found ===== */
        .not-found-box {
            text-align: center;
            padding: 60px 20px;
        }
        .not-found-box i {
            font-size: 4rem;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
        }
        .not-found-box p {
            color: var(--text-secondary);
            max-width: 400px;
            margin: 8px auto 24px;
        }
        .not-found-box .btn-back {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            padding: 10px 32px;
            border-radius: 50px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .not-found-box .btn-back:hover {
            background: var(--accent-light);
            transform: translateY(-2px);
            color: #fff;
        }

        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .navbar-nav .nav-link.active::after {
                display: none;
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .article-main {
                padding: 28px 24px;
            }
            .related-card {
                padding: 20px 22px;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 16px;
            }
            .article-hero {
                padding: 44px 0 36px;
            }
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-hero .meta-line {
                font-size: 0.85rem;
                gap: 12px;
            }
            .article-section {
                padding: 32px 0 40px;
            }
            .article-main {
                padding: 20px 16px;
                border-radius: var(--radius);
            }
            .article-body {
                font-size: 0.98rem;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
            .article-body h3 {
                font-size: 1.1rem;
            }
            .related-section .section-title {
                font-size: 1.3rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .site-footer {
                padding: 32px 0 20px;
            }
            .footer-desc {
                max-width: 100%;
            }
            .article-nav-links {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.25rem;
            }
            .article-main {
                padding: 16px 12px;
            }
            .article-body {
                font-size: 0.95rem;
            }
            .article-body h2 {
                font-size: 1.2rem;
            }
            .article-body pre {
                padding: 14px 16px;
                font-size: 0.82rem;
            }
            .related-card h5 {
                font-size: 1rem;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 0.92rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #2D6A4F;
            --primary-light: #40916C;
            --primary-dark: #1B4332;
            --primary-gradient: linear-gradient(135deg, #2D6A4F 0%, #40916C 100%);
            --secondary: #52B788;
            --accent: #95D5B2;
            --bg-light: #F0F7F4;
            --bg-white: #FFFFFF;
            --bg-dark: #1B4332;
            --text-primary: #1A1A2E;
            --text-secondary: #4A4A6A;
            --text-muted: #7A7A9A;
            --text-white: #FFFFFF;
            --border-color: #D8E2DC;
            --border-radius-sm: 8px;
            --border-radius: 12px;
            --border-radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(45, 106, 79, 0.08);
            --shadow: 0 8px 30px rgba(45, 106, 79, 0.12);
            --shadow-lg: 0 20px 60px rgba(45, 106, 79, 0.18);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-white);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-light);
        }
        a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 4px;
            border-radius: 4px;
        }

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

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

        ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

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

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

        /* ===== Typography ===== */
        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: rgba(45, 106, 79, 0.10);
            padding: 4px 16px;
            border-radius: 100px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .section-title .highlight {
            color: var(--primary);
        }

        .section-sub {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 32px auto;
        }

        @media (max-width: 768px) {
            .section-title {
                font-size: 1.5rem;
            }
            .section-sub {
                font-size: 0.95rem;
            }
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .site-header .navbar {
            padding: 0;
            width: 100%;
        }

        .navbar-brand {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary) !important;
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .navbar-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--primary);
            border-radius: 50%;
            margin-left: 2px;
            animation: pulse-dot 2s ease-in-out infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.6;
                transform: scale(0.85);
            }
        }

        .navbar-nav .nav-link {
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary) !important;
            padding: 8px 18px !important;
            border-radius: 8px;
            transition: all var(--transition);
            position: relative;
        }
        .navbar-nav .nav-link:hover {
            color: var(--primary) !important;
            background: rgba(45, 106, 79, 0.06);
        }
        .navbar-nav .nav-link.active {
            color: var(--primary) !important;
            background: rgba(45, 106, 79, 0.10);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
        }

        .navbar-toggler {
            border: none;
            font-size: 1.5rem;
            color: var(--text-primary);
            padding: 4px 8px;
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: none;
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: var(--bg-white);
                border-radius: var(--border-radius);
                padding: 16px 12px;
                box-shadow: var(--shadow-lg);
                margin-top: 12px;
                border: 1px solid var(--border-color);
            }
            .navbar-nav .nav-link {
                padding: 10px 16px !important;
            }
            .navbar-nav .nav-link.active::after {
                bottom: 4px;
            }
        }

        /* ===== Hero (分类页小首屏) ===== */
        .category-hero {
            padding: 80px 0 60px;
            background: var(--bg-light);
            position: relative;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(45, 106, 79, 0.08) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -5%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(82, 183, 136, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .hero-content {
            position: relative;
            z-index: 1;
        }
        .category-hero h1 {
            font-size: 2.5rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .category-hero h1 .highlight {
            color: var(--primary);
        }
        .category-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 640px;
            margin-bottom: 24px;
        }
        .category-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(45, 106, 79, 0.10);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        .category-hero .hero-badge i {
            font-size: 1rem;
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 60px 0 40px;
            }
            .category-hero h1 {
                font-size: 1.75rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
        }

        /* ===== 通用板块间距 ===== */
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 48px 0;
            }
        }

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

        /* ===== 卡片 ===== */
        .card-tutorial {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 28px 24px;
            transition: all var(--transition);
            height: 100%;
        }
        .card-tutorial:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
            border-color: var(--accent);
        }
        .card-tutorial .card-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--border-radius-sm);
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .card-tutorial .card-icon.icon-light {
            background: rgba(45, 106, 79, 0.10);
            color: var(--primary);
        }
        .card-tutorial h3 {
            font-size: 1.15rem;
            font-weight: 600;
            margin-bottom: 8px;
        }
        .card-tutorial p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 12px;
        }
        .card-tutorial .step-tag {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(45, 106, 79, 0.08);
            padding: 2px 12px;
            border-radius: 100px;
            margin-bottom: 10px;
        }
        .card-tutorial .card-link {
            font-weight: 500;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.9rem;
        }
        .card-tutorial .card-link i {
            transition: transform var(--transition);
        }
        .card-tutorial .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 步骤流程 ===== */
        .step-flow {
            display: flex;
            flex-direction: column;
            gap: 0;
            position: relative;
            padding-left: 40px;
        }
        .step-flow::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 12px;
            bottom: 12px;
            width: 2px;
            background: var(--border-color);
        }
        .step-item {
            position: relative;
            padding: 0 0 36px 24px;
        }
        .step-item:last-child {
            padding-bottom: 0;
        }
        .step-item .step-num {
            position: absolute;
            left: -40px;
            top: 0;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--primary-gradient);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 2;
            box-shadow: 0 4px 12px rgba(45, 106, 79, 0.25);
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin-bottom: 0;
        }

        @media (max-width: 576px) {
            .step-flow {
                padding-left: 32px;
            }
            .step-item .step-num {
                left: -32px;
                width: 28px;
                height: 28px;
                font-size: 0.75rem;
            }
            .step-item {
                padding: 0 0 24px 16px;
            }
        }

        /* ===== 平台标签 ===== */
        .platform-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 0.82rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
        }
        .platform-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(45, 106, 79, 0.06);
        }
        .platform-tag i {
            font-size: 1rem;
        }
        .platform-tag.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        /* ===== 视频教程卡片 ===== */
        .video-card {
            border-radius: var(--border-radius);
            overflow: hidden;
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            transition: all var(--transition);
            height: 100%;
        }
        .video-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }
        .video-card .video-thumb {
            position: relative;
            aspect-ratio: 16 / 9;
            background: var(--bg-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            color: var(--primary);
        }
        .video-card .video-thumb .play-overlay {
            position: absolute;
            inset: 0;
            background: rgba(27, 67, 50, 0.30);
            display: flex;
            align-items: center;
            justify-content: center;
            opacity: 0;
            transition: opacity var(--transition);
        }
        .video-card:hover .video-thumb .play-overlay {
            opacity: 1;
        }
        .video-card .video-thumb .play-overlay i {
            font-size: 3rem;
            color: #fff;
            filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
        }
        .video-card .video-body {
            padding: 16px 20px 20px;
        }
        .video-card .video-body h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .video-card .video-body .video-meta {
            font-size: 0.82rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            padding: 20px 0;
        }
        .faq-item:first-child {
            padding-top: 0;
        }
        .faq-item .faq-question {
            font-weight: 600;
            font-size: 1.05rem;
            color: var(--text-primary);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            padding: 0;
            font-family: inherit;
            transition: color var(--transition);
        }
        .faq-item .faq-question:hover {
            color: var(--primary);
        }
        .faq-item .faq-question i {
            font-size: 1.2rem;
            color: var(--text-muted);
            transition: transform var(--transition);
        }
        .faq-item .faq-question[aria-expanded="true"] i {
            transform: rotate(180deg);
        }
        .faq-item .faq-answer {
            padding-top: 12px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--primary-gradient);
            border-radius: var(--border-radius-lg);
            padding: 56px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1.05rem;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-section .btn-cta {
            background: #fff;
            color: var(--primary-dark);
            border: none;
            padding: 14px 40px;
            border-radius: 100px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .cta-section .btn-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.20);
            background: #f8fff9;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 36px 24px;
            }
            .cta-section h2 {
                font-size: 1.35rem;
            }
            .cta-section p {
                font-size: 0.95rem;
            }
            .cta-section .btn-cta {
                padding: 12px 28px;
                font-size: 0.92rem;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 56px 0 32px;
        }
        .site-footer .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: #fff;
            display: inline-flex;
            align-items: center;
            gap: 2px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            background: var(--secondary);
            border-radius: 50%;
            margin-left: 2px;
        }
        .site-footer .footer-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
            line-height: 1.7;
        }
        .site-footer .footer-heading {
            font-size: 0.85rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: rgba(255, 255, 255, 0.5);
            margin-bottom: 16px;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: color var(--transition);
        }
        .site-footer .footer-links a:hover {
            color: #fff;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.10);
            padding-top: 24px;
            margin-top: 40px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        @media (max-width: 768px) {
            .site-footer {
                padding: 40px 0 24px;
            }
            .site-footer .footer-desc {
                max-width: 100%;
            }
        }

        /* ===== 工具类 ===== */
        .text-primary-custom {
            color: var(--primary) !important;
        }
        .bg-primary-soft {
            background: rgba(45, 106, 79, 0.06);
        }
        .rounded-custom {
            border-radius: var(--border-radius);
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 576px) {
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .card-tutorial {
                padding: 20px 16px;
            }
            .card-tutorial .card-icon {
                width: 44px;
                height: 44px;
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.3rem;
            }
        }

        /* ===== 滚动条美化 ===== */
        ::-webkit-scrollbar {
            width: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--bg-light);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--accent);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--secondary);
        }

        /* ===== 骨架屏 / 加载占位 ===== */
        .skeleton {
            background: linear-gradient(90deg, var(--bg-light) 25%, #e8f0ec 50%, var(--bg-light) 75%);
            background-size: 200% 100%;
            animation: skeleton-loading 1.5s infinite;
            border-radius: 6px;
        }
        @keyframes skeleton-loading {
            0% {
                background-position: 200% 0;
            }
            100% {
                background-position: -200% 0;
            }
        }

/* roulang page: category2 */
/* ========== :root 设计变量 ========== */
        :root {
            --color-primary: #2563eb;
            --color-primary-dark: #1d4ed8;
            --color-primary-light: #3b82f6;
            --color-primary-bg: #eff6ff;
            --color-secondary: #7c3aed;
            --color-secondary-light: #8b5cf6;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-bg: #ffffff;
            --color-bg-alt: #f8fafc;
            --color-bg-card: #ffffff;
            --color-text: #0f172a;
            --color-text-secondary: #475569;
            --color-text-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08), 0 2px 8px rgba(15, 23, 42, 0.04);
            --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1), 0 4px 16px rgba(15, 23, 42, 0.06);
            --shadow-xl: 0 24px 60px rgba(15, 23, 42, 0.12);
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1140px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 1rem;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }

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

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

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

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

        .text-gradient {
            background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-padding {
            padding: 80px 0;
        }

        .section-padding-sm {
            padding: 56px 0;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 0.75rem;
            color: var(--color-text);
        }

        .section-subtitle {
            font-size: 1.125rem;
            color: var(--color-text-secondary);
            max-width: 640px;
            margin: 0 auto 3rem auto;
            line-height: 1.6;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.8125rem;
            font-weight: 600;
            color: var(--color-primary);
            background: var(--color-primary-bg);
            padding: 4px 14px;
            border-radius: 100px;
            letter-spacing: 0.02em;
            margin-bottom: 12px;
        }

        .section-label i {
            font-size: 0.75rem;
        }

        /* ========== Header & Nav ========== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1040;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(16px) saturate(180%);
            -webkit-backdrop-filter: blur(16px) saturate(180%);
            border-bottom: 1px solid var(--color-border-light);
            transition: box-shadow var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 1px 8px rgba(15, 23, 42, 0.06);
        }

        .site-header .navbar {
            padding: 0;
            height: var(--header-height);
        }

        .site-header .navbar-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 2px;
            padding: 0;
        }

        .site-header .navbar-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
            margin-left: 2px;
            animation: pulse-dot 2.4s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(0.75);
            }
        }

        .site-header .navbar-nav .nav-link {
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: color var(--transition), background var(--transition);
            position: relative;
        }

        .site-header .navbar-nav .nav-link:hover {
            color: var(--color-text);
            background: var(--color-bg-alt);
        }

        .site-header .navbar-nav .nav-link.active {
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }

        .site-header .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--color-primary);
        }

        .navbar-toggler {
            border: none;
            background: transparent;
            color: var(--color-text);
            font-size: 1.5rem;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.2);
            outline: none;
        }

        /* ========== Hero ========== */
        .hero-version {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
            padding: 80px 0 64px;
            position: relative;
            overflow: hidden;
        }

        .hero-version::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%),
                radial-gradient(ellipse at 80% 30%, rgba(124, 58, 237, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-version .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.06);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            padding: 6px 18px 6px 12px;
            border-radius: 100px;
            color: rgba(255, 255, 255, 0.8);
            font-size: 0.8125rem;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .hero-version .hero-badge i {
            color: var(--color-accent);
        }

        .hero-version h1 {
            font-size: 3rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            color: #ffffff;
            line-height: 1.15;
            margin-bottom: 1rem;
        }

        .hero-version h1 .highlight {
            background: linear-gradient(135deg, #60a5fa, #a78bfa);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-version .hero-desc {
            font-size: 1.125rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-version .hero-stats {
            display: flex;
            gap: 32px;
            flex-wrap: wrap;
            padding-top: 16px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .hero-version .hero-stats .stat-item {
            text-align: center;
        }
        .hero-version .hero-stats .stat-number {
            font-size: 1.75rem;
            font-weight: 700;
            color: #ffffff;
            display: block;
            line-height: 1.2;
        }
        .hero-version .hero-stats .stat-label {
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.55);
            font-weight: 400;
        }

        /* ========== 版本时间线 ========== */
        .timeline-section {
            background: var(--color-bg);
        }

        .timeline {
            position: relative;
            padding-left: 40px;
            max-width: 820px;
            margin: 0 auto;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--color-primary), var(--color-secondary));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 40px;
            padding: 24px 28px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 28px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--color-primary);
            border: 3px solid var(--color-bg);
            box-shadow: 0 0 0 2px var(--color-primary);
        }

        .timeline-item .version-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 100px;
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .version-tag.latest {
            background: #dbeafe;
            color: #1d4ed8;
        }
        .version-tag.stable {
            background: #d1fae5;
            color: #047857;
        }
        .version-tag.beta {
            background: #fef3c7;
            color: #b45309;
        }
        .version-tag.old {
            background: #f1f5f9;
            color: #64748b;
        }

        .timeline-item .version-title {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 4px;
            display: flex;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
        }

        .timeline-item .version-date {
            font-size: 0.8125rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
            margin-bottom: 12px;
        }

        .timeline-item .version-date i {
            font-size: 0.75rem;
        }

        .timeline-item .version-changelog {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .timeline-item .version-changelog li {
            font-size: 0.9375rem;
            color: var(--color-text-secondary);
            padding: 3px 0;
            padding-left: 20px;
            position: relative;
            line-height: 1.6;
        }

        .timeline-item .version-changelog li::before {
            content: '›';
            position: absolute;
            left: 4px;
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .timeline-item .version-changelog li.feature::before {
            content: '+';
            color: var(--color-success);
        }
        .timeline-item .version-changelog li.fix::before {
            content: '✓';
            color: var(--color-primary);
        }
        .timeline-item .version-changelog li.important::before {
            content: '!';
            color: var(--color-accent-dark);
            font-weight: 700;
        }

        /* ========== 版本对比表 ========== */
        .compare-section {
            background: var(--color-bg-alt);
        }

        .version-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            background: var(--color-bg-card);
        }

        .version-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9375rem;
            min-width: 640px;
        }

        .version-table thead {
            background: var(--color-bg-alt);
        }

        .version-table thead th {
            padding: 16px 20px;
            text-align: left;
            font-weight: 600;
            color: var(--color-text);
            font-size: 0.875rem;
            letter-spacing: 0.02em;
            border-bottom: 2px solid var(--color-border);
        }

        .version-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--color-border-light);
            color: var(--color-text-secondary);
            vertical-align: middle;
        }

        .version-table tbody tr:last-child td {
            border-bottom: none;
        }

        .version-table tbody tr:hover {
            background: var(--color-bg-alt);
        }

        .version-table .badge-version {
            display: inline-block;
            font-size: 0.8125rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: 100px;
            background: var(--color-primary-bg);
            color: var(--color-primary);
        }

        .version-table .badge-version.latest {
            background: #dbeafe;
            color: #1d4ed8;
        }

        .version-table .tag-new {
            display: inline-block;
            font-size: 0.6875rem;
            font-weight: 700;
            padding: 0 8px;
            border-radius: 100px;
            background: var(--color-success);
            color: #ffffff;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-left: 6px;
        }

        /* ========== 功能亮点卡片 ========== */
        .features-section {
            background: var(--color-bg);
        }

        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            height: 100%;
            transition: box-shadow var(--transition), transform var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
            opacity: 0;
            transition: opacity var(--transition);
        }

        .feature-card:hover::after {
            opacity: 1;
        }

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

        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: var(--color-primary-bg);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .feature-card .feature-card-title {
            font-size: 1.125rem;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .feature-card .feature-card-desc {
            font-size: 0.9375rem;
            color: var(--color-text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== 更新通知订阅 ========== */
        .subscribe-section {
            background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
            position: relative;
            overflow: hidden;
        }

        .subscribe-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(37, 99, 235, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .subscribe-section .subscribe-wrapper {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 640px;
            margin: 0 auto;
        }

        .subscribe-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 0.75rem;
        }

        .subscribe-section p {
            font-size: 1.0625rem;
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 2rem;
        }

        .subscribe-form {
            display: flex;
            gap: 12px;
            max-width: 480px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }

        .subscribe-form .form-control {
            flex: 1;
            min-width: 200px;
            padding: 12px 18px;
            border-radius: var(--radius-sm);
            border: 1px solid rgba(255, 255, 255, 0.15);
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
            font-size: 0.9375rem;
            backdrop-filter: blur(4px);
        }
        .subscribe-form .form-control::placeholder {
            color: rgba(255, 255, 255, 0.4);
        }
        .subscribe-form .form-control:focus {
            outline: none;
            border-color: var(--color-primary-light);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.25);
        }

        .subscribe-form .btn-subscribe {
            padding: 12px 32px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 600;
            border: none;
            font-size: 0.9375rem;
            transition: background var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .subscribe-form .btn-subscribe:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
        }
        .subscribe-form .btn-subscribe:active {
            transform: scale(0.97);
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--color-bg-alt);
        }

        .faq-accordion .accordion-item {
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            background: var(--color-bg-card);
            box-shadow: var(--shadow-sm);
        }

        .faq-accordion .accordion-button {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-text);
            padding: 18px 24px;
            background: transparent;
            box-shadow: none;
            border: none;
            transition: color var(--transition), background var(--transition);
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            color: var(--color-primary);
            background: var(--color-primary-bg);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: none;
            border-color: var(--color-border);
        }
        .faq-accordion .accordion-button::after {
            background-size: 1rem;
            transition: transform var(--transition);
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--color-text-secondary);
            font-size: 0.9375rem;
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border-light);
        }

        .cta-box {
            background: linear-gradient(135deg, var(--color-primary-bg), #eef2ff);
            border: 1px solid rgba(37, 99, 235, 0.15);
            border-radius: var(--radius-lg);
            padding: 48px 40px;
            text-align: center;
        }

        .cta-box h3 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 0.75rem;
        }

        .cta-box p {
            font-size: 1.0625rem;
            color: var(--color-text-secondary);
            max-width: 520px;
            margin: 0 auto 1.75rem auto;
        }

        .cta-box .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            background: var(--color-primary);
            color: #ffffff;
            font-weight: 600;
            font-size: 1.0625rem;
            border: none;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
        }
        .cta-box .btn-download:hover {
            background: var(--color-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(37, 99, 235, 0.3);
            color: #ffffff;
        }
        .cta-box .btn-download:active {
            transform: scale(0.97);
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 32px;
        }

        .site-footer .footer-brand {
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            display: inline-flex;
            align-items: center;
            gap: 2px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand .brand-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--color-primary);
            margin-left: 2px;
        }
        .site-footer .footer-brand:hover {
            color: #ffffff;
        }

        .site-footer .footer-desc {
            font-size: 0.9375rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.55);
            max-width: 360px;
            margin-bottom: 0;
        }

        .site-footer .footer-heading {
            font-size: 0.9375rem;
            font-weight: 600;
            color: #ffffff;
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 8px;
        }
        .site-footer .footer-links a {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.875rem;
            transition: color var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .site-footer .footer-links a:hover {
            color: #ffffff;
        }

        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.4);
            text-align: center;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .hero-version h1 {
                font-size: 2.5rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
            .section-padding {
                padding: 64px 0;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 64px;
            }

            .hero-version {
                padding: 56px 0 48px;
            }
            .hero-version h1 {
                font-size: 1.9rem;
            }
            .hero-version .hero-desc {
                font-size: 1rem;
            }
            .hero-version .hero-stats {
                gap: 20px;
            }
            .hero-version .hero-stats .stat-number {
                font-size: 1.4rem;
            }

            .section-padding {
                padding: 48px 0;
            }
            .section-padding-sm {
                padding: 40px 0;
            }
            .section-title {
                font-size: 1.65rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 2rem;
            }

            .timeline {
                padding-left: 32px;
            }
            .timeline::before {
                left: 10px;
            }
            .timeline-item {
                padding: 18px 20px;
            }
            .timeline-item::before {
                left: -24px;
                width: 12px;
                height: 12px;
                top: 22px;
            }
            .timeline-item .version-title {
                font-size: 1.15rem;
            }

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

            .subscribe-section h2 {
                font-size: 1.65rem;
            }
            .subscribe-form .form-control {
                min-width: 100%;
            }

            .cta-box {
                padding: 36px 24px;
            }
            .cta-box h3 {
                font-size: 1.4rem;
            }

            .site-footer {
                padding: 40px 0 24px;
            }
        }

        @media (max-width: 520px) {
            .container-custom {
                padding: 0 16px;
            }
            .hero-version h1 {
                font-size: 1.6rem;
            }
            .hero-version .hero-stats {
                gap: 16px;
                flex-direction: column;
                align-items: flex-start;
            }
            .hero-version .hero-stats .stat-item {
                text-align: left;
                display: flex;
                align-items: baseline;
                gap: 8px;
            }
            .hero-version .hero-stats .stat-number {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .timeline-item .version-title {
                font-size: 1rem;
            }
            .version-table {
                font-size: 0.8125rem;
            }
            .version-table thead th,
            .version-table tbody td {
                padding: 10px 14px;
            }
            .cta-box .btn-download {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .subscribe-form .btn-subscribe {
                width: 100%;
            }
        }

        /* ========== 滚动条美化 ========== */
        ::-webkit-scrollbar {
            width: 6px;
            height: 6px;
        }
        ::-webkit-scrollbar-track {
            background: var(--color-bg-alt);
        }
        ::-webkit-scrollbar-thumb {
            background: var(--color-text-muted);
            border-radius: 3px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: var(--color-text-secondary);
        }

        /* ========== 打印 ========== */
        @media print {
            .site-header {
                position: relative;
            }
            body {
                padding-top: 0;
            }
            .hero-version {
                background: #f8fafc !important;
                color: #0f172a !important;
            }
            .hero-version h1,
            .hero-version .hero-desc,
            .hero-version .hero-stats .stat-number,
            .hero-version .hero-stats .stat-label {
                color: #0f172a !important;
            }
            .subscribe-section {
                background: #f1f5f9 !important;
            }
            .subscribe-section h2 {
                color: #0f172a;
            }
            .subscribe-section p {
                color: #475569;
            }
        }