/* ==================== 全局重置与变量 ==================== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --color-primary: #FF6B35;
            --color-primary-dark: #E8551E;
            --color-primary-light: #FF8A5C;
            --color-secondary: #1E293B;
            --color-gray-50: #F8FAFC;
            --color-gray-100: #F1F5F9;
            --color-gray-200: #E2E8F0;
            --color-gray-300: #CBD5E1;
            --color-gray-400: #94A3B8;
            --color-gray-500: #64748B;
            --color-gray-600: #475569;
            --color-gray-700: #334155;
            --color-gray-800: #1E293B;
            --color-gray-900: #0F172A;
            
            --font-heading: 'Inter', 'Noto Sans SC', sans-serif;
            --font-body: 'Inter', 'Noto Sans SC', sans-serif;
            
            --container-max-width: 1280px;
            --section-spacing: 60px;
            
            --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
            --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
            
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            font-weight: 400;
            color: var(--color-gray-800);
            background-color: #FFFFFF;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 600;
            line-height: 1.2;
            color: var(--color-gray-900);
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

        ul {
            list-style: none;
        }

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

        /* ==================== 按钮 ==================== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 10px 24px;
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-md);
            transition: all 0.2s ease;
            cursor: pointer;
            border: none;
            white-space: nowrap;
        }

        .btn i {
            width: 18px;
            height: 18px;
        }

        .btn-primary {
            background: var(--color-primary);
            color: white;
            box-shadow: var(--shadow-sm);
        }

        .btn-primary:hover {
            background: var(--color-primary-dark);
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        .btn-outline {
            background: transparent;
            color: var(--color-gray-800);
            border: 1.5px solid var(--color-gray-300);
        }

        .btn-outline:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 107, 53, 0.02);
        }

        .btn-sm {
            padding: 8px 12px;
            font-size: 13px;
        }

        /* ==================== 顶部导航栏 ==================== */
        .header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.98);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--color-gray-200);
        }

        .header-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
            padding: 0 24px;
            max-width: var(--container-max-width);
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 700;
            font-size: 24px;
        }

        .logo-text {
            font-size: 24px;
            font-weight: 700;
            color: var(--color-gray-900);
        }

        .logo-text span {
            color: var(--color-primary);
            font-weight: 600;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 40px;
        }

        .nav-link {
            font-weight: 500;
            color: var(--color-gray-700);
            position: relative;
        }

        .nav-link:hover {
            color: var(--color-primary);
        }

        .nav-link.active {
            color: var(--color-primary);
            font-weight: 600;
        }

        .nav-link.has-dropdown::after {
            content: '';
            display: inline-block;
            width: 16px;
            height: 16px;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23334155' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") no-repeat center;
            margin-left: 4px;
            vertical-align: middle;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 20px;
        }

        .search-btn, .lang-switch {
            background: none;
            border: none;
            cursor: pointer;
            color: var(--color-gray-600);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all 0.2s ease;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .search-btn:hover, .lang-switch:hover {
            background: var(--color-gray-100);
            color: var(--color-primary);
        }

        /* ==================== 面包屑导航 ==================== */
        .breadcrumb {
            padding: 20px 0;
            background: var(--color-gray-50);
            border-bottom: 1px solid var(--color-gray-200);
        }

        .breadcrumb-container {
            max-width: var(--container-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .breadcrumb ol {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--color-gray-500);
        }

        .breadcrumb li {
            display: flex;
            align-items: center;
        }

        .breadcrumb li:not(:last-child)::after {
            content: '/';
            margin-left: 8px;
            color: var(--color-gray-400);
        }

        .breadcrumb a {
            color: var(--color-gray-600);
        }

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

        /* ==================== 页面标题区 ==================== */
        .page-header {
            padding: 40px 0 20px;
        }

        .page-header h1 {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .page-header p {
            font-size: 16px;
            color: var(--color-gray-500);
            max-width: 700px;
        }

        /* ==================== 分类导航标签 ==================== */
        .category-tabs {
            margin-bottom: 32px;
            border-bottom: 1px solid var(--color-gray-200);
        }

        .tabs-container {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .tab-item {
            padding: 12px 24px;
            font-weight: 500;
            color: var(--color-gray-600);
            border-bottom: 3px solid transparent;
            cursor: pointer;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .tab-item.active {
            color: var(--color-primary);
            border-bottom-color: var(--color-primary);
        }

        .tab-item:hover {
            color: var(--color-primary);
        }

        /* ==================== 主内容区布局 ==================== */
        .main-content {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding: 20px 0 60px;
        }

        /* 左侧文章列表区 */
        .article-list-section {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .article-card {
            display: flex;
            gap: 24px;
            padding: 24px;
            background: white;
            border-radius: var(--radius-lg);
            border: 1px solid var(--color-gray-200);
            transition: all 0.2s ease;
            cursor: pointer;
        }

        .article-card:hover {
            box-shadow: var(--shadow-lg);
            border-color: var(--color-primary-light);
            transform: translateY(-2px);
        }

        .article-image {
            width: 200px;
            height: 140px;
            border-radius: var(--radius-md);
            overflow: hidden;
            flex-shrink: 0;
            background: var(--color-gray-100);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .article-content {
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 8px;
            font-size: 13px;
            color: var(--color-gray-500);
        }

        .article-category {
            background: rgba(255, 107, 53, 0.1);
            color: var(--color-primary);
            padding: 2px 10px;
            border-radius: 100px;
            font-size: 12px;
            font-weight: 500;
        }

        .article-title {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 10px;
            line-height: 1.4;
            color: var(--color-gray-900);
        }

        .article-title:hover {
            color: var(--color-primary);
        }

        .article-excerpt {
            font-size: 14px;
            color: var(--color-gray-600);
            margin-bottom: 16px;
            line-height: 1.6;
            flex: 1;
        }

        .article-footer {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-gray-500);
        }

        .article-tags {
            display: flex;
            gap: 6px;
        }

        .tag {
            background: var(--color-gray-100);
            padding: 2px 8px;
            border-radius: 100px;
            font-size: 12px;
            color: var(--color-gray-600);
        }

        .download-badge {
            display: flex;
            align-items: center;
            gap: 4px;
            color: var(--color-primary);
            font-weight: 500;
        }

        /* 右侧边栏 */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }

        .sidebar-widget {
            background: var(--color-gray-50);
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--color-gray-200);
        }

        .widget-title {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .search-box {
            display: flex;
            gap: 8px;
        }

        .search-box input {
            flex: 1;
            padding: 12px 16px;
            border: 1px solid var(--color-gray-300);
            border-radius: var(--radius-md);
            font-size: 14px;
            background: white;
        }

        .search-box input:focus {
            outline: none;
            border-color: var(--color-primary);
        }

        .hot-articles li, .recent-articles li {
            padding: 12px 0;
            border-bottom: 1px solid var(--color-gray-200);
        }

        .hot-articles li:last-child, .recent-articles li:last-child {
            border-bottom: none;
        }

        .hot-articles a, .recent-articles a {
            display: block;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 4px;
        }

        .hot-articles a:hover, .recent-articles a:hover {
            color: var(--color-primary);
        }

        .article-date {
            font-size: 12px;
            color: var(--color-gray-500);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .cloud-tag {
            background: white;
            padding: 6px 14px;
            border-radius: 100px;
            font-size: 13px;
            color: var(--color-gray-700);
            border: 1px solid var(--color-gray-200);
            transition: all 0.2s ease;
        }

        .cloud-tag:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: rgba(255, 107, 53, 0.02);
        }

        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 20px;
        }

        .page-item {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: white;
            border: 1px solid var(--color-gray-200);
            color: var(--color-gray-700);
            cursor: pointer;
            transition: all 0.2s ease;
        }

        .page-item.active {
            background: var(--color-primary);
            border-color: var(--color-primary);
            color: white;
        }

        .page-item:hover:not(.active) {
            border-color: var(--color-primary);
            color: var(--color-primary);
        }

        /* 底部 */
        .footer {
            background: var(--color-gray-900);
            color: white;
            padding: 60px 0 30px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 50px;
        }

        .footer-brand p {
            color: var(--color-gray-400);
            margin: 20px 0;
            font-size: 14px;
        }

        .footer-links h4 {
            color: white;
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-links ul li {
            margin-bottom: 12px;
        }

        .footer-links ul li a {
            color: var(--color-gray-400);
            font-size: 14px;
        }

        .footer-links ul li a:hover {
            color: white;
        }

        .footer-contact p {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--color-gray-400);
            font-size: 14px;
            margin-bottom: 12px;
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: var(--color-gray-500);
            font-size: 13px;
        }

        /* 响应式 */
        @media (max-width: 900px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            .article-card {
                flex-direction: column;
            }
            .article-image {
                width: 100%;
                height: 180px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                position: static;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .nav-menu {
                display: none;
            }
        }