/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6c3bff;
            --primary-dark: #4f2ab3;
            --primary-light: #9b7aff;
            --primary-gradient: linear-gradient(135deg, #6c3bff 0%, #4f2ab3 100%);
            --secondary: #ff6b6b;
            --secondary-light: #ff9a9a;
            --accent: #00d4aa;
            --accent-dark: #00a88c;
            --bg-body: #0b0a1a;
            --bg-card: #14122a;
            --bg-card-hover: #1d1a3a;
            --bg-section-alt: #100e22;
            --text-primary: #f0edff;
            --text-secondary: #c8c2e8;
            --text-muted: #8880aa;
            --border-color: rgba(108, 59, 255, 0.2);
            --border-hover: rgba(108, 59, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 16px 60px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 40px rgba(108, 59, 255, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; font-size: 16px; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary-light); text-decoration: none; transition: var(--transition); }
        a:hover { color: #b8a5ff; }
        button, input, textarea, select { font-family: inherit; font-size: 1rem; outline: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); }
        h2 { font-size: clamp(1.8rem, 3.5vw, 2.8rem); }
        h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-secondary); }

        /* ===== Container ===== */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }
        @media screen and (max-width: 639px) {
            .container-custom { padding: 0 16px; }
        }

        /* ===== 导航 Header ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-height);
            background: rgba(11, 10, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(108, 59, 255, 0.12);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(11, 10, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .site-logo i {
            font-size: 1.6rem;
            -webkit-text-fill-color: initial;
            color: var(--primary-light);
        }
        .site-logo:hover { opacity: 0.9; }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover {
            color: var(--text-primary);
            background: rgba(108, 59, 255, 0.1);
        }
        .nav-menu a.active {
            color: #fff;
            background: var(--primary-gradient);
            box-shadow: 0 4px 15px rgba(108, 59, 255, 0.3);
        }
        .nav-menu a.active:hover {
            box-shadow: 0 6px 25px rgba(108, 59, 255, 0.4);
            transform: translateY(-1px);
        }
        .nav-cta {
            padding: 8px 22px !important;
            border-radius: var(--radius-sm) !important;
            background: var(--primary-gradient) !important;
            color: #fff !important;
            font-weight: 600 !important;
            box-shadow: 0 4px 15px rgba(108, 59, 255, 0.25);
        }
        .nav-cta:hover {
            transform: translateY(-2px) !important;
            box-shadow: 0 8px 30px rgba(108, 59, 255, 0.35) !important;
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
        }
        .mobile-toggle:hover { background: rgba(108, 59, 255, 0.1); }

        @media screen and (max-width: 768px) {
            .mobile-toggle { display: block; }
            .nav-menu {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(11, 10, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                gap: 4px;
                border-bottom: 1px solid rgba(108, 59, 255, 0.12);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
            }
            .nav-menu.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-menu a {
                width: 100%;
                padding: 12px 18px;
                font-size: 1rem;
            }
            .nav-cta { text-align: center; }
        }

        /* ===== Hero 首屏 ===== */
        .hero-section {
            min-height: 100vh;
            display: flex;
            align-items: center;
            position: relative;
            padding: calc(var(--header-height) + 40px) 0 80px;
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(108, 59, 255, 0.12) 0%, transparent 60%),
                        radial-gradient(ellipse at 80% 30%, rgba(0, 212, 170, 0.08) 0%, transparent 50%),
                        radial-gradient(ellipse at 50% 80%, rgba(255, 107, 107, 0.06) 0%, transparent 40%);
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-content h1 {
            margin-bottom: 20px;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-content p {
            font-size: 1.15rem;
            margin-bottom: 32px;
            max-width: 520px;
        }
        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 28px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 500;
            background: rgba(108, 59, 255, 0.12);
            border: 1px solid rgba(108, 59, 255, 0.2);
            color: var(--text-secondary);
        }
        .hero-badge i { color: var(--primary-light); font-size: 0.7rem; }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            background: var(--primary-gradient);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(108, 59, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 35px rgba(108, 59, 255, 0.4);
            color: #fff;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: var(--radius-sm);
            background: transparent;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            border: 1px solid rgba(108, 59, 255, 0.3);
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--primary-light);
            background: rgba(108, 59, 255, 0.08);
            transform: translateY(-3px);
            color: var(--text-primary);
        }
        .hero-visual {
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-glow-card {
            width: 100%;
            max-width: 480px;
            aspect-ratio: 4/3;
            border-radius: var(--radius-lg);
            background: var(--primary-gradient);
            padding: 3px;
            box-shadow: var(--shadow-lg), var(--shadow-glow);
        }
        .hero-glow-inner {
            width: 100%;
            height: 100%;
            border-radius: calc(var(--radius-lg) - 2px);
            background: var(--bg-card);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 30px;
            text-align: center;
        }
        .hero-glow-inner i {
            font-size: 4rem;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 20px;
        }
        .hero-glow-inner h3 {
            font-size: 1.4rem;
            margin-bottom: 8px;
        }
        .hero-glow-inner p { font-size: 0.95rem; margin-bottom: 0; }

        @media screen and (max-width: 1024px) {
            .hero-grid { gap: 40px; }
        }
        @media screen and (max-width: 768px) {
            .hero-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
            .hero-content p { margin-left: auto; margin-right: auto; }
            .hero-badges { justify-content: center; }
            .hero-actions { justify-content: center; }
            .hero-visual { order: -1; }
            .hero-glow-card { max-width: 360px; }
        }
        @media screen and (max-width: 520px) {
            .hero-section { padding-top: calc(var(--header-height) + 20px); padding-bottom: 40px; }
            .hero-content h1 { font-size: 2rem; }
            .hero-content p { font-size: 1rem; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
        }

        /* ===== 通用板块 ===== */
        .section-padding { padding: 80px 0; }
        @media screen and (max-width: 768px) { .section-padding { padding: 50px 0; } }
        @media screen and (max-width: 520px) { .section-padding { padding: 36px 0; } }
        .section-alt { background: var(--bg-section-alt); }
        .section-title {
            text-align: center;
            margin-bottom: 16px;
        }
        .section-subtitle {
            text-align: center;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 48px;
            font-size: 1.05rem;
        }
        @media screen and (max-width: 520px) { .section-subtitle { margin-bottom: 30px; } }

        /* ===== 核心说明板块 ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .feature-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0;
            height: 3px;
            background: var(--primary-gradient);
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .feature-card:hover::before { opacity: 1; }
        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(108, 59, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 59, 255, 0.3);
        }
        .feature-card h3 { margin-bottom: 10px; font-size: 1.2rem; }
        .feature-card p { font-size: 0.92rem; margin-bottom: 0; }

        @media screen and (max-width: 768px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
        }
        @media screen and (max-width: 520px) {
            .features-grid { grid-template-columns: 1fr; gap: 16px; }
            .feature-card { padding: 24px 20px; }
        }

        /* ===== 分类入口板块 ===== */
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }
        .category-card {
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            display: block;
        }
        .category-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-hover);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .category-card-inner {
            padding: 36px 30px;
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .category-icon {
            width: 72px;
            height: 72px;
            border-radius: var(--radius-sm);
            background: rgba(108, 59, 255, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--primary-light);
            flex-shrink: 0;
            transition: var(--transition);
        }
        .category-card:hover .category-icon {
            background: var(--primary-gradient);
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 59, 255, 0.3);
        }
        .category-info h3 { font-size: 1.25rem; margin-bottom: 6px; }
        .category-info p { font-size: 0.9rem; margin-bottom: 0; }
        .category-arrow {
            margin-left: auto;
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(108, 59, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary-light);
            transition: var(--transition);
        }
        .category-card:hover .category-arrow {
            background: var(--primary-gradient);
            color: #fff;
            transform: translateX(4px);
        }

        @media screen and (max-width: 768px) {
            .categories-grid { gap: 20px; }
            .category-card-inner { padding: 24px 20px; gap: 16px; }
            .category-icon { width: 56px; height: 56px; font-size: 1.5rem; }
        }
        @media screen and (max-width: 520px) {
            .categories-grid { grid-template-columns: 1fr; }
        }

        /* ===== 最新资讯列表 ===== */
        .news-list {
            display: grid;
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            padding: 22px 26px;
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .news-item:hover {
            border-color: var(--border-hover);
            background: var(--bg-card-hover);
            transform: translateX(4px);
            box-shadow: var(--shadow-sm);
        }
        .news-tag {
            flex-shrink: 0;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(108, 59, 255, 0.15);
            color: var(--primary-light);
            border: 1px solid rgba(108, 59, 255, 0.2);
        }
        .news-content { flex: 1; min-width: 0; }
        .news-content h4 {
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 4px;
            transition: var(--transition);
        }
        .news-item:hover .news-content h4 { color: var(--primary-light); }
        .news-content p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            margin-top: 8px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .news-meta i { margin-right: 4px; font-size: 0.7rem; }
        .news-empty {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px dashed var(--border-color);
        }
        .news-empty i { font-size: 2rem; margin-bottom: 12px; color: var(--text-muted); display: block; }

        @media screen and (max-width: 520px) {
            .news-item { flex-direction: column; gap: 10px; padding: 18px; }
            .news-tag { align-self: flex-start; }
        }

        /* ===== 数据统计板块 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .stat-number {
            font-size: 2.6rem;
            font-weight: 800;
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 6px;
        }
        .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

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

        /* ===== 流程步骤 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            counter-reset: step;
        }
        .step-card {
            text-align: center;
            padding: 36px 24px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            position: relative;
            transition: var(--transition);
        }
        .step-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin: 0 auto 20px;
            box-shadow: 0 4px 20px rgba(108, 59, 255, 0.3);
        }
        .step-card h3 { font-size: 1.15rem; margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; margin-bottom: 0; }

        @media screen and (max-width: 768px) {
            .steps-grid { grid-template-columns: 1fr; gap: 20px; max-width: 400px; margin: 0 auto; }
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 780px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-hover); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            background: none;
            border: none;
            color: var(--text-primary);
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            text-align: left;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--primary-light); }
        .faq-question i {
            font-size: 1.2rem;
            color: var(--primary-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            padding: 0 24px;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p { font-size: 0.92rem; margin-bottom: 0; color: var(--text-secondary); }

        @media screen and (max-width: 520px) {
            .faq-question { padding: 14px 16px; font-size: 0.95rem; }
            .faq-item.active .faq-answer { padding: 0 16px 14px; }
        }

        /* ===== CTA 区域 ===== */
        .cta-section {
            background: var(--primary-gradient);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section h2 {
            color: #fff;
            margin-bottom: 12px;
            position: relative;
        }
        .cta-section p {
            color: rgba(255,255,255,0.85);
            max-width: 520px;
            margin: 0 auto 28px;
            font-size: 1.05rem;
            position: relative;
        }
        .cta-section .btn-primary {
            background: #fff;
            color: var(--primary-dark);
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
            position: relative;
        }
        .cta-section .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 35px rgba(0,0,0,0.3);
            color: var(--primary-dark);
        }

        @media screen and (max-width: 520px) {
            .cta-section { padding: 40px 20px; border-radius: var(--radius-md); }
            .cta-section h2 { font-size: 1.5rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--bg-section-alt);
            border-top: 1px solid rgba(108, 59, 255, 0.1);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { font-size: 1.4rem; margin-bottom: 14px; display: inline-flex; }
        .footer-brand p {
            font-size: 0.9rem;
            color: var(--text-muted);
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            padding: 4px 0;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .footer-col a:hover { color: var(--primary-light); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid rgba(108, 59, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }
        .footer-bottom p {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .footer-socials {
            display: flex;
            gap: 12px;
        }
        .footer-socials a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(108, 59, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-socials a:hover {
            background: var(--primary-gradient);
            color: #fff;
            transform: translateY(-3px);
        }

        @media screen and (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 30px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media screen and (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 辅助 ===== */
        .text-gradient {
            background: var(--primary-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .focus-ring:focus-visible { outline: 2px solid var(--primary-light); outline-offset: 2px; border-radius: 4px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #e63946;
            --primary-dark: #c12d3a;
            --primary-light: #ff6b77;
            --secondary: #1d3557;
            --secondary-light: #2a4a7a;
            --accent: #f4a261;
            --bg-body: #f9f7f5;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-section-alt: #f0ece8;
            --text-primary: #1a1a2e;
            --text-secondary: #4a4a6a;
            --text-light: #7a7a9a;
            --text-white: #ffffff;
            --border-color: #e8e0da;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-body: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== 基础重置 ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-body);
            color: var(--text-primary);
            background: var(--bg-body);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }

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

        /* ===== 导航 ===== */
        .site-header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: var(--nav-height);
            box-shadow: var(--shadow-sm);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.5px;
        }
        .site-logo i { font-size: 1.4rem; color: var(--primary); }
        .site-logo:hover { color: var(--primary-dark); transform: scale(1.02); }
        .nav-menu {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            position: relative;
        }
        .nav-menu a:hover {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.06);
        }
        .nav-menu a.active {
            color: var(--primary);
            background: rgba(230, 57, 70, 0.1);
            font-weight: 600;
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }
        .nav-cta {
            background: var(--primary) !important;
            color: var(--text-white) !important;
            padding: 8px 22px !important;
            border-radius: var(--radius-xl) !important;
            font-weight: 600 !important;
            display: flex;
            align-items: center;
            gap: 8px;
            margin-left: 8px;
            box-shadow: 0 4px 12px rgba(230, 57, 70, 0.3);
        }
        .nav-cta:hover {
            background: var(--primary-dark) !important;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(230, 57, 70, 0.4);
        }
        .nav-cta i { font-size: 0.9rem; }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.6rem;
            color: var(--text-primary);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
        }
        .menu-toggle:hover { background: rgba(0,0,0,0.04); }

        @media screen and (max-width: 768px) {
            .menu-toggle { display: block; }
            .nav-menu {
                position: absolute;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow-md);
                display: none;
                gap: 4px;
                border-radius: 0 0 var(--radius-md) var(--radius-md);
            }
            .nav-menu.open { display: flex; }
            .nav-menu a { padding: 12px 16px; width: 100%; border-radius: var(--radius-sm); }
            .nav-menu a.active::after { display: none; }
            .nav-cta { margin-left: 0; justify-content: center; margin-top: 6px; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--secondary);
            color: rgba(255,255,255,0.85);
            padding: 60px 0 0;
            margin-top: 80px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .footer-brand .site-logo {
            color: var(--text-white);
            font-size: 1.5rem;
            margin-bottom: 16px;
            display: inline-flex;
        }
        .footer-brand .site-logo i { color: var(--accent); }
        .footer-brand p {
            color: rgba(255,255,255,0.65);
            font-size: 0.92rem;
            max-width: 360px;
            line-height: 1.7;
        }
        .footer-col h4 {
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-col a {
            display: block;
            color: rgba(255,255,255,0.65);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--accent); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            color: rgba(255,255,255,0.5);
            font-size: 0.85rem;
        }
        .footer-socials { display: flex; gap: 16px; }
        .footer-socials a {
            color: rgba(255,255,255,0.5);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .footer-socials a:hover { color: var(--accent); transform: translateY(-2px); }

        @media screen and (max-width: 900px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media screen and (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ===== 页面标题区 ===== */
        .page-hero {
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
            padding: 80px 0 60px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(230,57,70,0.15) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(244,162,97,0.1) 0%, transparent 70%);
            border-radius: 50%;
        }
        .page-hero .container-custom { position: relative; z-index: 1; }
        .page-hero h1 {
            color: var(--text-white);
            font-size: 2.8rem;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }
        .page-hero p {
            color: rgba(255,255,255,0.75);
            font-size: 1.15rem;
            max-width: 640px;
            margin: 0 auto 24px;
            line-height: 1.7;
        }
        .page-hero .breadcrumb {
            color: rgba(255,255,255,0.5);
            font-size: 0.9rem;
            margin-bottom: 8px;
        }
        .page-hero .breadcrumb a { color: rgba(255,255,255,0.7); }
        .page-hero .breadcrumb a:hover { color: var(--accent); }
        .page-hero .breadcrumb span { color: rgba(255,255,255,0.9); }

        @media screen and (max-width: 768px) {
            .page-hero { padding: 56px 0 40px; }
            .page-hero h1 { font-size: 2rem; }
            .page-hero p { font-size: 1rem; }
        }

        /* ===== 通用板块 ===== */
        .section-block {
            padding: 70px 0;
        }
        .section-block-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 560px;
            margin-bottom: 40px;
            line-height: 1.6;
        }
        .section-title-center {
            text-align: center;
        }
        .section-subtitle-center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        @media screen and (max-width: 768px) {
            .section-block { padding: 48px 0; }
            .section-title { font-size: 1.6rem; }
            .section-subtitle { font-size: 0.95rem; margin-bottom: 28px; }
        }

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

        @media screen and (max-width: 1024px) {
            .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
        }
        @media screen and (max-width: 768px) {
            .card-grid, .card-grid-2, .card-grid-4 { grid-template-columns: repeat(2, 1fr); gap: 16px; }
        }
        @media screen and (max-width: 520px) {
            .card-grid, .card-grid-2, .card-grid-4 { grid-template-columns: 1fr; }
        }

        /* ===== 攻略卡片 ===== */
        .guide-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
        }
        .guide-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: transparent;
        }
        .guide-card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            background: #e8e0da;
            display: block;
        }
        .guide-card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .guide-card-tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }
        .guide-tag {
            background: rgba(230, 57, 70, 0.08);
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 2px 12px;
            border-radius: var(--radius-xl);
            letter-spacing: 0.3px;
        }
        .guide-tag-tech { background: rgba(29, 53, 87, 0.08); color: var(--secondary); }
        .guide-tag-hot { background: rgba(244, 162, 97, 0.15); color: #c77d3a; }
        .guide-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .guide-card h3 a { color: var(--text-primary); }
        .guide-card h3 a:hover { color: var(--primary); }
        .guide-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .guide-card-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 12px;
            border-top: 1px solid var(--border-color);
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .guide-card-meta i { margin-right: 4px; }
        .guide-card-meta .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 0.85rem;
        }
        .guide-card-meta .read-more:hover { gap: 4px; }

        @media screen and (max-width: 520px) {
            .guide-card-body { padding: 16px; }
            .guide-card h3 { font-size: 1rem; }
        }

        /* ===== 特色攻略卡片（大图） ===== */
        .feature-guide {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .feature-guide:hover { box-shadow: var(--shadow-lg); }
        .feature-guide-img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            background: #ddd6d0;
            display: block;
            min-height: 280px;
        }
        .feature-guide-body {
            padding: 36px 36px 36px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .feature-guide-body .guide-tag { margin-bottom: 10px; display: inline-block; width: fit-content; }
        .feature-guide-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .feature-guide-body p {
            color: var(--text-secondary);
            font-size: 1rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .feature-guide-body .btn-primary {
            align-self: flex-start;
        }

        @media screen and (max-width: 900px) {
            .feature-guide { grid-template-columns: 1fr; }
            .feature-guide-img { min-height: 200px; aspect-ratio: 16/9; }
            .feature-guide-body { padding: 24px; }
            .feature-guide-body h2 { font-size: 1.3rem; }
        }

        /* ===== 分类筛选 ===== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 36px;
            align-items: center;
        }
        .filter-bar .filter-label {
            font-weight: 600;
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-right: 6px;
        }
        .filter-btn {
            padding: 6px 20px;
            border-radius: var(--radius-xl);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.88rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-btn:hover { border-color: var(--primary); color: var(--primary); background: rgba(230,57,70,0.04); }
        .filter-btn.active {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(230,57,70,0.25);
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            background: var(--primary);
            color: var(--text-white);
            border: none;
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 16px rgba(230,57,70,0.25);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(230,57,70,0.35);
            color: var(--text-white);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 30px;
            background: transparent;
            color: var(--secondary);
            border: 2px solid var(--secondary);
            border-radius: var(--radius-xl);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            background: var(--secondary);
            color: var(--text-white);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }

        /* ===== 列表区块 ===== */
        .list-section {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
        }
        .list-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .list-item:last-child { border-bottom: none; }
        .list-item:hover { background: rgba(230,57,70,0.02); }
        .list-item .rank {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-light);
            min-width: 32px;
        }
        .list-item .rank.top3 { color: var(--primary); }
        .list-item .info { flex: 1; }
        .list-item .info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
        .list-item .info p { color: var(--text-secondary); font-size: 0.85rem; }
        .list-item .badge-count {
            background: rgba(230,57,70,0.08);
            color: var(--primary);
            padding: 2px 14px;
            border-radius: var(--radius-xl);
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== FAQ ===== */
        .faq-grid {
            display: grid;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary); box-shadow: var(--shadow-sm); }
        .faq-question {
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-primary);
            background: none;
            border: none;
            width: 100%;
            text-align: left;
            transition: var(--transition);
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
        .faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 18px;
            color: var(--text-secondary);
            font-size: 0.92rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, var(--secondary) 0%, #16213e 100%);
            border-radius: var(--radius-lg);
            padding: 60px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            top: -30%;
            left: -10%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(230,57,70,0.12) 0%, transparent 70%);
            border-radius: 50%;
        }
        .cta-block h2 {
            color: var(--text-white);
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 14px;
            position: relative;
        }
        .cta-block p {
            color: rgba(255,255,255,0.7);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
        }
        .cta-block .btn-primary {
            background: var(--accent);
            color: var(--text-primary);
            box-shadow: 0 4px 20px rgba(244,162,97,0.4);
            position: relative;
        }
        .cta-block .btn-primary:hover { background: #e8914a; transform: translateY(-2px); }

        @media screen and (max-width: 768px) {
            .cta-block { padding: 40px 24px; }
            .cta-block h2 { font-size: 1.5rem; }
        }

        /* ===== 分页 ===== */
        .pagination-nav {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 48px;
            flex-wrap: wrap;
        }
        .pagination-nav a, .pagination-nav span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
        }
        .pagination-nav a:hover { border-color: var(--primary); color: var(--primary); }
        .pagination-nav .current {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .pagination-nav .disabled { opacity: 0.4; pointer-events: none; }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mt-40 { margin-top: 40px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .flex-wrap { flex-wrap: wrap; }

        /* ===== 骨架占位（内容列表用） ===== */
        .skeleton {
            background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%);
            background-size: 200% 100%;
            animation: shimmer 1.5s infinite;
            border-radius: var(--radius-sm);
        }
        @keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

        /* ===== 标签云 ===== */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud a {
            padding: 4px 16px;
            border-radius: var(--radius-xl);
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .tag-cloud a:hover {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container { max-width: var(--container-max); padding: 0 24px; }
        @media screen and (max-width: 768px) {
            .grid-container { padding: 0 16px; }
        }

/* roulang page: article */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    --accent: #f59e0b;
    --accent-dark: #d97706;
    --accent-light: #fbbf24;
    --dark: #0f172a;
    --dark-soft: #1e293b;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-soft: #f1f5f9;
    --text: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    --container-max: 1200px;
    --header-h: 72px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
a:focus-visible { outline: 3px solid var(--primary-light); outline-offset: 2px; border-radius: var(--radius-sm); }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; }
.container-custom {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}
@media (max-width: 768px) { .container-custom { padding: 0 16px; } }

/* Header & Navigation */
.site-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-h);
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(12px);
    background: rgba(255,255,255,0.95);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-h);
}
.site-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.5px;
}
.site-logo i { color: var(--primary); font-size: 1.6rem; }
.site-logo:hover { color: var(--primary); transform: scale(1.02); }
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
}
.nav-menu a {
    padding: 8px 18px;
    border-radius: var(--radius-sm);
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}
.nav-menu a:hover { color: var(--primary); background: var(--bg-soft); }
.nav-menu a.active {
    color: var(--primary);
    background: rgba(37,99,235,0.08);
    font-weight: 600;
}
.nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 3px;
    background: var(--primary);
    border-radius: 4px;
}
.nav-cta {
    background: var(--primary) !important;
    color: #fff !important;
    padding: 10px 24px !important;
    border-radius: var(--radius-sm) !important;
    font-weight: 600 !important;
    display: flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 14px rgba(37,99,235,0.3);
    transition: var(--transition) !important;
}
.nav-cta:hover { background: var(--primary-dark) !important; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(37,99,235,0.4); color: #fff !important; }
.nav-cta i { font-size: 1rem; }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--dark); cursor: pointer; padding: 8px; border-radius: var(--radius-sm); }
@media (max-width: 820px) {
    .mobile-toggle { display: block; }
    .nav-menu {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px 24px;
        gap: 6px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-120%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
    }
    .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: all; }
    .nav-menu a { width: 100%; padding: 12px 16px; font-size: 1.05rem; }
    .nav-menu a.active::after { display: none; }
    .nav-cta { justify-content: center; margin-top: 8px; }
}

/* Breadcrumb */
.breadcrumb-area {
    padding: 20px 0 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}
.breadcrumb-area a { color: var(--text-muted); }
.breadcrumb-area a:hover { color: var(--primary); }
.breadcrumb-area span { color: var(--text-light); font-weight: 500; }
.breadcrumb-sep { margin: 0 10px; color: var(--border); }

/* Article Hero */
.article-hero {
    padding: 32px 0 24px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-light);
}
.article-hero .article-category {
    display: inline-block;
    background: rgba(37,99,235,0.08);
    color: var(--primary);
    padding: 4px 14px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.3px;
    margin-bottom: 16px;
    text-transform: uppercase;
}
.article-hero h1 {
    font-size: 2.4rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: center;
    color: var(--text-muted);
    font-size: 0.9rem;
}
.article-meta .meta-item { display: flex; align-items: center; gap: 6px; }
.article-meta .meta-item i { font-size: 0.85rem; color: var(--text-muted); }
.article-meta .meta-author { font-weight: 500; color: var(--text-light); }
@media (max-width: 768px) {
    .article-hero h1 { font-size: 1.6rem; }
    .article-meta { gap: 12px; font-size: 0.8rem; }
}

/* Article Content */
.article-main {
    padding: 40px 0 60px;
}
.article-body {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    padding: 40px 48px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
}
.article-body p {
    margin-bottom: 1.4em;
    font-size: 1.05rem;
    line-height: 1.8;
    color: var(--text);
}
.article-body h2 { font-size: 1.6rem; font-weight: 700; margin-top: 2em; margin-bottom: 0.8em; color: var(--dark); }
.article-body h3 { font-size: 1.25rem; font-weight: 600; margin-top: 1.8em; margin-bottom: 0.6em; color: var(--dark-soft); }
.article-body ul, .article-body ol { margin-bottom: 1.4em; padding-left: 1.5em; }
.article-body ul li { list-style: disc; margin-bottom: 0.4em; }
.article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-body blockquote {
    border-left: 4px solid var(--primary);
    background: var(--bg-soft);
    padding: 16px 24px;
    margin: 1.5em 0;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    font-style: italic;
    color: var(--text-light);
}
.article-body img { border-radius: var(--radius-md); margin: 1.5em 0; box-shadow: var(--shadow-sm); }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body a:hover { color: var(--primary-dark); }
.article-body code { background: var(--bg-soft); padding: 2px 8px; border-radius: 4px; font-size: 0.9em; color: var(--dark-soft); }
.article-body pre { background: var(--dark); color: #e2e8f0; padding: 20px 24px; border-radius: var(--radius-md); overflow-x: auto; margin: 1.5em 0; font-size: 0.9rem; }
@media (max-width: 768px) {
    .article-body { padding: 24px 20px; }
    .article-body p { font-size: 1rem; }
}

/* Tags */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}
.article-tags .tag {
    background: var(--bg-soft);
    color: var(--text-light);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}
.article-tags .tag:hover { background: var(--primary); color: #fff; }

/* Share */
.article-share {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-light);
}
.article-share span { font-size: 0.9rem; color: var(--text-muted); font-weight: 500; }
.article-share a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    transition: var(--transition);
    font-size: 1rem;
}
.article-share a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }

/* Not Found */
.not-found-box {
    text-align: center;
    padding: 80px 24px;
    max-width: 600px;
    margin: 0 auto;
}
.not-found-box i { font-size: 4rem; color: var(--text-muted); margin-bottom: 20px; }
.not-found-box h2 { font-size: 1.8rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.not-found-box p { color: var(--text-light); margin-bottom: 24px; font-size: 1.05rem; }
.not-found-box .btn-home { display: inline-flex; align-items: center; gap: 8px; padding: 12px 32px; background: var(--primary); color: #fff; border-radius: var(--radius-sm); font-weight: 600; transition: var(--transition); }
.not-found-box .btn-home:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); color: #fff; }

/* CTA Section */
.article-cta {
    padding: 60px 0;
    background: var(--dark);
    color: #fff;
    text-align: center;
}
.article-cta h2 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
.article-cta p { color: rgba(255,255,255,0.7); font-size: 1.05rem; margin-bottom: 28px; max-width: 600px; margin-left: auto; margin-right: auto; }
.article-cta .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.article-cta .cta-btn { padding: 14px 36px; border-radius: var(--radius-sm); font-weight: 600; transition: var(--transition); display: inline-flex; align-items: center; gap: 10px; font-size: 1rem; }
.article-cta .cta-btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(37,99,235,0.4); }
.article-cta .cta-btn-primary:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 8px 28px rgba(37,99,235,0.5); color: #fff; }
.article-cta .cta-btn-outline { border: 2px solid rgba(255,255,255,0.3); color: #fff; }
.article-cta .cta-btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-3px); color: #fff; }
@media (max-width: 768px) {
    .article-cta h2 { font-size: 1.5rem; }
    .article-cta .cta-buttons { flex-direction: column; align-items: center; }
}

/* Related Articles */
.related-section {
    padding: 60px 0;
    background: var(--bg-soft);
}
.related-section .section-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 32px;
    text-align: center;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-light);
    transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.related-card .card-img { height: 180px; background: var(--bg-soft); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 2.5rem; }
.related-card .card-body { padding: 20px 24px; }
.related-card .card-body h3 { font-size: 1.05rem; font-weight: 600; color: var(--dark); margin-bottom: 8px; line-height: 1.4; }
.related-card .card-body h3 a { color: var(--dark); }
.related-card .card-body h3 a:hover { color: var(--primary); }
.related-card .card-body p { font-size: 0.9rem; color: var(--text-light); line-height: 1.6; margin-bottom: 12px; }
.related-card .card-meta { font-size: 0.8rem; color: var(--text-muted); display: flex; gap: 12px; }
@media (max-width: 820px) {
    .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px) {
    .related-grid { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
    background: var(--dark);
    color: rgba(255,255,255,0.7);
    padding: 60px 0 0;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .site-logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
.footer-brand .site-logo i { color: var(--primary); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; color: rgba(255,255,255,0.6); }
.footer-col h4 { color: #fff; font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.footer-col a { display: block; color: rgba(255,255,255,0.6); padding: 4px 0; font-size: 0.9rem; transition: var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 6px; }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 0;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
    flex-wrap: wrap;
    gap: 12px;
}
.footer-socials { display: flex; gap: 12px; }
.footer-socials a { color: rgba(255,255,255,0.5); font-size: 1.2rem; transition: var(--transition); }
.footer-socials a:hover { color: #fff; transform: scale(1.15); }
@media (max-width: 820px) {
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .footer-bottom { flex-direction: column; text-align: center; }
}

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* roulang page: category2 */
/* ===== Design Variables ===== */
        :root {
            --primary: #2a6df4;
            --primary-dark: #1a4fbf;
            --primary-light: #e8f0fe;
            --secondary: #f59e0b;
            --secondary-light: #fef3c7;
            --accent: #10b981;
            --accent-light: #d1fae5;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-dark: #0f172a;
            --bg-section-alt: #f1f5f9;
            --text-dark: #0b1a33;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border-light: #e2e8f0;
            --border-medium: #cbd5e1;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 8px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Base Reset ===== */
        *,
        *::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);
            background: var(--bg-body);
            color: var(--text-body);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover {
            color: var(--primary-dark);
        }
        a:focus-visible {
            outline: 3px solid var(--primary);
            outline-offset: 2px;
            border-radius: var(--radius-sm);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ===== Utility ===== */
        .container-custom {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.25;
            margin-bottom: 0.5rem;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 2rem;
        }
        .section-header {
            text-align: center;
            margin-bottom: 3rem;
        }
        .section-header .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }

        .badge {
            display: inline-block;
            padding: 0.2rem 0.75rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: var(--primary-light);
            color: var(--primary);
            border: 1px solid rgba(42, 109, 244, 0.15);
        }
        .badge-hot {
            background: #fef2f2;
            color: #dc2626;
            border-color: rgba(220, 38, 38, 0.15);
        }
        .badge-new {
            background: var(--accent-light);
            color: #047857;
            border-color: rgba(16, 185, 129, 0.2);
        }
        .badge-tip {
            background: var(--secondary-light);
            color: #b45309;
            border-color: rgba(245, 158, 11, 0.2);
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 0.75rem;
        }
        .tag {
            display: inline-block;
            padding: 0.2rem 0.8rem;
            font-size: 0.75rem;
            border-radius: 999px;
            background: var(--bg-body);
            color: var(--text-muted);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: default;
        }
        .tag:hover {
            background: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.7rem 1.8rem;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(42, 109, 244, 0.3);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(42, 109, 244, 0.35);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(42, 109, 244, 0.3);
        }
        .btn-secondary {
            background: var(--bg-card);
            color: var(--text-dark);
            border: 2px solid var(--border-medium);
        }
        .btn-secondary:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background: var(--accent);
            color: #fff;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
        }
        .btn-accent:hover {
            background: #059669;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
        }
        .btn-sm {
            padding: 0.45rem 1.2rem;
            font-size: 0.85rem;
        }
        .btn-lg {
            padding: 0.9rem 2.4rem;
            font-size: 1.05rem;
        }
        .btn i {
            font-size: 0.9em;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            height: var(--header-h);
            display: flex;
            align-items: center;
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-dark);
            text-decoration: none;
            letter-spacing: -0.02em;
        }
        .site-logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .site-logo:hover {
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }
        .nav-menu a {
            display: block;
            padding: 0.5rem 1rem;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition);
            position: relative;
        }
        .nav-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-menu a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 10px rgba(42, 109, 244, 0.25);
        }
        .nav-menu a.active:hover {
            background: var(--primary-dark);
        }
        .nav-menu a.nav-cta {
            background: var(--secondary);
            color: #fff;
            font-weight: 600;
            padding: 0.5rem 1.4rem;
            box-shadow: 0 2px 10px rgba(245, 158, 11, 0.3);
        }
        .nav-menu a.nav-cta:hover {
            background: #d97706;
            transform: translateY(-1px);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
        }
        .nav-menu a.nav-cta i {
            margin-right: 0.3rem;
        }

        /* Hamburger (移动端) */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px 4px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 3px;
            background: var(--text-dark);
            border-radius: 4px;
            transition: all var(--transition);
        }
        .hamburger:hover {
            background: var(--primary-light);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(6px, -6px);
        }

        /* ===== Breadcrumb ===== */
        .breadcrumb-area {
            background: var(--bg-section-alt);
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .breadcrumb-list a {
            color: var(--text-muted);
        }
        .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .breadcrumb-list .sep {
            color: var(--text-light);
        }
        .breadcrumb-list .current {
            color: var(--text-dark);
            font-weight: 600;
        }

        /* ===== Hero (分类横幅) ===== */
        .category-hero {
            background: linear-gradient(135deg, #0b1a33 0%, #1a2f4f 100%);
            padding: 3rem 0 3.5rem;
            position: relative;
            overflow: hidden;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(42, 109, 244, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .category-hero .container-custom {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-label {
            display: inline-block;
            padding: 0.25rem 1rem;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.1);
            color: var(--secondary);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .category-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 1rem;
            letter-spacing: -0.02em;
        }
        .category-hero p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 680px;
            line-height: 1.7;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 2.5rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .category-hero .hero-stat {
            color: #fff;
        }
        .category-hero .hero-stat .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
        }
        .category-hero .hero-stat .label {
            display: block;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 0.1rem;
        }

        /* ===== Featured News (精选要闻) ===== */
        .featured-news {
            padding: 3.5rem 0;
            background: var(--bg-card);
        }
        .featured-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        .featured-main {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition), transform var(--transition);
            border: 1px solid var(--border-light);
        }
        .featured-main:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .featured-main .card-img {
            height: 240px;
            background: linear-gradient(135deg, #dbeafe, #ede9fe);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 3rem;
            color: var(--primary);
            position: relative;
        }
        .featured-main .card-img .overlay-badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: var(--primary);
            color: #fff;
            padding: 0.2rem 1rem;
            border-radius: 999px;
            font-size: 0.75rem;
            font-weight: 600;
        }
        .featured-main .card-body {
            padding: 1.5rem;
        }
        .featured-main .card-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.5rem;
        }
        .featured-main .card-body p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.6;
        }
        .featured-main .card-meta {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin-top: 1rem;
            font-size: 0.8rem;
            color: var(--text-light);
        }
        .featured-main .card-meta i {
            margin-right: 0.3rem;
        }

        .featured-side {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .featured-side-item {
            display: flex;
            gap: 1rem;
            background: var(--bg-body);
            border-radius: var(--radius-md);
            padding: 1rem 1.2rem;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: default;
            align-items: flex-start;
        }
        .featured-side-item:hover {
            box-shadow: var(--shadow-sm);
            border-color: var(--border-medium);
            transform: translateX(4px);
        }
        .featured-side-item .index {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--primary-light);
            line-height: 1;
            min-width: 36px;
            text-align: center;
            color: var(--primary);
            opacity: 0.5;
        }
        .featured-side-item .content h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 0.2rem;
        }
        .featured-side-item .content p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .featured-side-item .content .meta {
            display: flex;
            gap: 0.8rem;
            margin-top: 0.3rem;
            font-size: 0.7rem;
            color: var(--text-light);
        }

        /* ===== News Grid (资讯列表) ===== */
        .news-grid-section {
            padding: 3.5rem 0;
            background: var(--bg-section-alt);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: var(--border-medium);
        }
        .news-card .card-img {
            height: 160px;
            background: linear-gradient(135deg, #fef3c7, #fde68a);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2.4rem;
            color: var(--secondary);
            position: relative;
        }
        .news-card .card-img .badge {
            position: absolute;
            top: 0.75rem;
            left: 0.75rem;
        }
        .news-card .card-body {
            padding: 1.2rem 1.2rem 1.4rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .card-body .cat {
            font-size: 0.7rem;
            font-weight: 600;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 0.3rem;
        }
        .news-card .card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.4rem;
            line-height: 1.4;
        }
        .news-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
        }
        .news-card .card-body .meta {
            display: flex;
            align-items: center;
            gap: 0.8rem;
            margin-top: 0.8rem;
            font-size: 0.75rem;
            color: var(--text-light);
            border-top: 1px solid var(--border-light);
            padding-top: 0.8rem;
        }
        .news-card .card-body .meta i {
            margin-right: 0.25rem;
        }

        /* ===== Categories / 分类筛选 ===== */
        .filter-bar {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            justify-content: center;
            margin-bottom: 2.5rem;
        }
        .filter-btn {
            padding: 0.4rem 1.2rem;
            border-radius: 999px;
            border: 1px solid var(--border-medium);
            background: var(--bg-card);
            color: var(--text-body);
            font-size: 0.85rem;
            font-weight: 500;
            cursor: pointer;
            transition: all var(--transition);
        }
        .filter-btn:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }
        .filter-btn.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 2px 10px rgba(42, 109, 244, 0.2);
        }

        /* ===== Hot Topics (热门专题) ===== */
        .hot-topics {
            padding: 3.5rem 0;
            background: var(--bg-card);
        }
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }
        .topic-card {
            background: var(--bg-body);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.2rem;
            text-align: center;
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            cursor: default;
        }
        .topic-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: var(--border-medium);
        }
        .topic-card .icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 0.75rem;
            display: block;
        }
        .topic-card h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.3rem;
        }
        .topic-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .topic-card .count {
            display: inline-block;
            margin-top: 0.6rem;
            font-size: 0.7rem;
            color: var(--text-light);
            background: var(--bg-card);
            padding: 0.15rem 0.8rem;
            border-radius: 999px;
            border: 1px solid var(--border-light);
        }

        /* ===== Timeline / 更新日志 ===== */
        .timeline-section {
            padding: 3.5rem 0;
            background: var(--bg-section-alt);
        }
        .timeline {
            position: relative;
            padding-left: 2.5rem;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 0;
            bottom: 0;
            width: 3px;
            background: var(--border-light);
            border-radius: 4px;
        }
        .timeline-item {
            position: relative;
            margin-bottom: 2rem;
            padding-left: 1rem;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -2.15rem;
            top: 0.35rem;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--primary);
            border: 3px solid var(--bg-card);
            box-shadow: 0 0 0 2px var(--primary-light);
        }
        .timeline-item .date {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 0.2rem;
        }
        .timeline-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 0.2rem;
        }
        .timeline-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }
        .timeline-item .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.4rem;
            margin-top: 0.4rem;
        }
        .timeline-item .tags span {
            font-size: 0.7rem;
            padding: 0.1rem 0.6rem;
            border-radius: 999px;
            background: var(--primary-light);
            color: var(--primary);
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 3.5rem 0;
            background: linear-gradient(135deg, var(--bg-dark) 0%, #1a2f4f 100%);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.7);
            max-width: 560px;
            margin: 0 auto 1.5rem;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 3.5rem 0;
            background: var(--bg-card);
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1rem 2rem;
        }
        .faq-item {
            padding: 1rem 0;
            border-bottom: 1px solid var(--border-light);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-item .q {
            font-weight: 600;
            color: var(--text-dark);
            display: flex;
            align-items: baseline;
            gap: 0.5rem;
            font-size: 0.95rem;
        }
        .faq-item .q i {
            color: var(--primary);
            font-size: 0.8rem;
            margin-top: 0.2rem;
        }
        .faq-item .a {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-top: 0.3rem;
            padding-left: 1.3rem;
            line-height: 1.6;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 3rem 0 1.5rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            padding-bottom: 2rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-brand .site-logo {
            color: #fff;
            font-size: 1.5rem;
            margin-bottom: 0.75rem;
            display: inline-flex;
        }
        .footer-brand .site-logo i {
            color: var(--secondary);
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.5);
            max-width: 360px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.85rem;
            padding: 0.25rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover {
            color: var(--secondary);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 1.5rem;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            flex-wrap: wrap;
            gap: 0.8rem;
        }
        .footer-socials {
            display: flex;
            gap: 0.8rem;
        }
        .footer-socials a {
            color: rgba(255, 255, 255, 0.4);
            font-size: 1.2rem;
            transition: color var(--transition);
        }
        .footer-socials a:hover {
            color: var(--secondary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .featured-grid {
                grid-template-columns: 1fr;
            }
            .featured-main .card-img {
                height: 200px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .faq-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: var(--bg-card);
                flex-direction: column;
                padding: 1rem 1.5rem 1.5rem;
                border-bottom: 1px solid var(--border-light);
                box-shadow: var(--shadow-lg);
                border-radius: 0 0 var(--radius-md) var(--radius-md);
                gap: 0.25rem;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu a {
                padding: 0.7rem 1rem;
                border-radius: var(--radius-sm);
                width: 100%;
            }
            .nav-menu a.nav-cta {
                margin-top: 0.5rem;
                text-align: center;
            }

            .category-hero {
                padding: 2.5rem 0;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .hero-stats {
                gap: 1.5rem;
            }
            .category-hero .hero-stat .num {
                font-size: 1.4rem;
            }

            .section-title {
                font-size: 1.6rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
            .topic-grid {
                grid-template-columns: 1fr 1fr;
                gap: 1rem;
            }
            .featured-main .card-img {
                height: 180px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .timeline {
                padding-left: 1.8rem;
            }
            .timeline-item::before {
                left: -1.45rem;
                width: 12px;
                height: 12px;
            }
        }

        @media (max-width: 520px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero p {
                font-size: 0.95rem;
            }
            .hero-stats {
                flex-direction: column;
                gap: 0.8rem;
            }
            .filter-bar {
                gap: 0.4rem;
            }
            .filter-btn {
                font-size: 0.75rem;
                padding: 0.3rem 0.9rem;
            }
            .featured-side-item {
                flex-direction: column;
                gap: 0.4rem;
            }
            .featured-side-item .index {
                font-size: 1.2rem;
                min-width: auto;
                text-align: left;
            }
        }

        /* ===== Foundation 覆盖 ===== */
        .grid-container {
            max-width: var(--max-width);
        }
        .cell {
            margin-bottom: 0;
        }
        /* 确保 Foundation 不与自定义冲突 */
        .site-header .grid-container {
            padding: 0 24px;
            max-width: var(--max-width);
            margin: 0 auto;
            width: 100%;
        }
        @media (max-width: 640px) {
            .site-header .grid-container {
                padding: 0 16px;
            }
        }
        /* 修复 Foundation 按钮默认样式 */
        .button {
            transition: all var(--transition);
        }