:root {
            --primary-color: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary-color: #ea580c;
            --accent-color: #10b981;
            --light-bg: #f8fafc;
            --card-bg: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.1);
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
            line-height: 1.6;
            color: var(--text-primary);
            background-color: var(--light-bg);
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        /* 头部设计 */
        .site-header {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            color: white;
            padding: 1.2rem 0 0;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            position: relative;
            z-index: 10;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            padding-bottom: 15px;
        }
        
        .logo-area {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .logo-icon {
            width: 50px;
            height: 50px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .logo-text h1 {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 5px;
        }
        
        .logo-text p {
            font-size: 14px;
            opacity: 0.9;
        }
        
        /* 移动端搜索按钮 */
        .mobile-search-btn {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 20px;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.3s;
        }
        
        .mobile-search-btn:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        
        /* 移动端搜索框 - 全屏显示 */
        .mobile-search-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.95);
            z-index: 2000;
            display: none;
            flex-direction: column;
            justify-content: flex-start;
            align-items: center;
            padding-top: 80px;
        }
        
        .mobile-search-overlay.active {
            display: flex;
        }
        
        .mobile-search-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.3s;
        }
        
        .mobile-search-close:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        
        .mobile-search-container {
            width: 90%;
            max-width: 600px;
            padding: 20px;
        }
        
        .mobile-search-input {
            width: 100%;
            padding: 16px 20px;
            border: none;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.1);
            color: white;
            font-size: 18px;
            outline: none;
            border: 1px solid rgba(255, 255, 255, 0.2);
        }
        
        .mobile-search-input::placeholder {
            color: rgba(255, 255, 255, 0.7);
        }
        
        .mobile-search-input:focus {
            background: rgba(255, 255, 255, 0.15);
            border-color: rgba(255, 255, 255, 0.3);
        }
        
        .mobile-search-results {
            margin-top: 20px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 10px;
            padding: 20px;
            max-height: 60vh;
            overflow-y: auto;
        }
        
        .mobile-search-result-item {
            padding: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            color: white;
            cursor: pointer;
            transition: background 0.3s;
        }
        
        .mobile-search-result-item:hover {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
        }
        
        .mobile-search-result-title {
            font-weight: 600;
            margin-bottom: 5px;
            font-size: 16px;
        }
        
        .mobile-search-result-period {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
        }
        
        /* 移动端汉堡菜单 */
        .mobile-menu-toggle {
            display: none;
            background: none;
            border: none;
            color: white;
            font-size: 24px;
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.3s;
            z-index: 1001;
        }
        
        .mobile-menu-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        
        /* 侧边导航栏 - 移动端专用 */
        .side-nav {
            position: fixed;
            top: 0;
            left: -280px;
            width: 280px;
            height: 100vh;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
            box-shadow: 8px 0 30px rgba(0, 0, 0, 0.3);
            z-index: 1000;
            transition: left 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }
        
        .side-nav.active {
            left: 0;
        }
        
        .side-nav-header {
            padding: 25px 20px 15px;
            display: flex;
            align-items: center;
            gap: 15px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .side-nav-logo {
            width: 50px;
            height: 50px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .side-nav-title h2 {
            font-size: 18px;
            color: white;
            margin-bottom: 4px;
        }
        
        .side-nav-title p {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
        }
        
        .side-nav-close {
            position: absolute;
            top: 20px;
            right: 20px;
            background: none;
            border: none;
            color: white;
            font-size: 22px;
            cursor: pointer;
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background 0.3s;
        }
        
        .side-nav-close:hover {
            background: rgba(255, 255, 255, 0.1);
        }
        
        .side-nav-list {
            list-style: none;
            padding: 20px 0;
            flex: 1;
        }
        
        .side-nav-item {
            margin-bottom: 5px;
        }
        
        .side-nav-link {
            display: flex;
            align-items: center;
            padding: 18px 25px;
            color: white;
            text-decoration: none;
            font-size: 16px;
            font-weight: 500;
            transition: all 0.3s;
            border-left: 4px solid transparent;
        }
        
        .side-nav-link:hover, .side-nav-link.active {
            background: rgba(255, 255, 255, 0.1);
            border-left-color: white;
            padding-left: 28px;
        }
        
        .side-nav-link i {
            margin-right: 15px;
            font-size: 18px;
            width: 24px;
            text-align: center;
        }
        
        .side-nav-footer {
            padding: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 12px;
            color: rgba(255, 255, 255, 0.6);
            text-align: center;
        }
        
        /* 主内容区域模糊效果 */
        .content-wrapper {
            transition: filter 0.4s ease, opacity 0.4s ease;
        }
        
        .content-wrapper.blurred {
            filter: blur(5px) brightness(0.9);
            opacity: 0.8;
            pointer-events: none;
        }
        
        /* 导航栏 - 桌面端 */
        .main-nav {
            background-color: rgba(255, 255, 255, 0.08);
            border-radius: 10px 10px 0 0;
            position: relative;
        }
        
        .nav-list {
            display: flex;
            list-style: none;
            justify-content: space-between;
        }
        
        .nav-item {
            flex: 1;
        }
        
        .nav-link {
            display: block;
            text-align: center;
            padding: 16px 8px;
            color: white;
            text-decoration: none;
            font-weight: 500;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
            font-size: 15px;
        }
        
        .nav-link:hover, .nav-link.active {
            background-color: rgba(255, 255, 255, 0.15);
            border-bottom-color: white;
        }
        
        .nav-link i {
            margin-right: 8px;
            font-size: 16px;
        }
        
        /* 文章列表页面专用样式 */
        .article-list-page {
            padding: 25px 0;
        }
        
        .page-header {
            margin-bottom: 30px;
        }
        
        .page-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .page-title i {
            font-size: 30px;
        }
        
        .page-description {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 800px;
            line-height: 1.5;
        }
        
        /* 主内容布局 */
        .article-main-layout {
            display: grid;
            gap: 25px;
        }
        
        /* 文章列表区域 */
        .article-list-section {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .article-filter {
            background: var(--card-bg);
            border-radius: 12px;
            padding: 18px 22px;
            margin-bottom: 10px;
            box-shadow: var(--shadow);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .filter-tabs {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }
        
        .filter-tab {
            padding: 8px 16px;
            background: #f1f5f9;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 14px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        
        .filter-tab:hover, .filter-tab.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .article-sort {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .sort-label {
            font-size: 14px;
            color: var(--text-secondary);
        }
        
        .sort-select {
            padding: 6px 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background: white;
            color: var(--text-primary);
            font-size: 14px;
            cursor: pointer;
        }
        
        .sort-select:focus {
            border-color: var(--primary-color);
            outline: none;
        }
        
        /* 文章卡片 */
        .article-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s ease;
            border: 1px solid var(--border-color);
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-color);
        }
        
        .article-card.featured {
            border-top: 4px solid var(--secondary-color);
        }
        
        .article-card-header {
            padding: 22px 25px 0;
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
        }
        
        .article-category {
            padding: 6px 14px;
            background: linear-gradient(135deg, var(--secondary-color), #c2410c);
            color: white;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            display: inline-block;
        }
        
        .article-date {
            font-size: 14px;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        
        .article-card-body {
            padding: 18px 25px 20px;
        }
        
        .article-title {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
            transition: color 0.3s;
        }
        
        .article-card:hover .article-title {
            color: var(--primary-color);
        }
        
        .article-excerpt {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 18px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 15px;
            border-top: 1px solid var(--border-color);
        }
        
        .meta-info {
            display: flex;
            gap: 18px;
        }
        
        .meta-item {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-secondary);
        }
        
        .meta-item i {
            font-size: 14px;
        }
        
        .read-more {
            padding: 8px 18px;
            background: linear-gradient(to right, var(--primary-color), var(--primary-dark));
            color: white;
            text-decoration: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s;
            display: inline-block;
        }
        
        .read-more:hover {
            background: linear-gradient(to right, var(--primary-dark), #1e40af);
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(37, 99, 235, 0.2);
        }
        
        .read-more i {
            margin-left: 5px;
            font-size: 12px;
        }
        
        /* 特色文章 */
        .featured-article {
            grid-column: 1 / -1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border-top: 4px solid var(--secondary-color);
        }
        
        .featured-content {
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .featured-badge {
            display: inline-block;
            padding: 6px 14px;
            background: var(--secondary-color);
            color: white;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 15px;
            align-self: flex-start;
        }
        
        .featured-title {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 15px;
            line-height: 1.3;
        }
        
        .featured-excerpt {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 20px;
        }
        
        .featured-image {
            height: 100%;
            overflow: hidden;
            border-left: 1px solid var(--border-color);
        }
        
        .featured-image img {
            width: 100%;
            height: 279px;
            /* object-fit: cover; */
            transition: transform 0.5s ease;
        }
        
        .featured-article:hover .featured-image img {
            transform: scale(1.05);
        }
        
        /* 分页控件 */
        .pagination-container {
            display: flex;
            justify-content: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--border-color);
        }
        
        .pagination {
            display: flex;
            gap: 8px;
            align-items: center;
        }
        
        .pagination-btn {
            padding: 10px 16px;
            border-radius: 8px;
            background: white;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s;
            font-weight: 500;
            min-width: 40px;
        }
        
        .pagination-btn:hover, .pagination-btn.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }
        
        .pagination-btn i {
            font-size: 14px;
        }
        
        .pagination-ellipsis {
            padding: 0 8px;
            color: var(--text-secondary);
        }
        
        /* 侧边栏 */
        .sidebar-section {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        
        .sidebar-card {
            background: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .sidebar-header {
            padding: 18px 22px;
            border-bottom: 1px solid var(--border-color);
            background: linear-gradient(to right, #f0f7ff, #e6f0ff);
        }
        
        .sidebar-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .sidebar-body {
            padding: 22px;
        }
        
        /* 热门文章侧边栏 */
        .popular-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        
        .popular-item {
            display: flex;
            align-items: flex-start;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-color);
            transition: all 0.3s;
            text-decoration: none;
            color: var(--text-primary);
        }
        
        .popular-item:last-child {
            border-bottom: none;
        }
        
        .popular-item:hover {
            padding-left: 8px;
        }
        
        .popular-rank {
            width: 24px;
            height: 24px;
            background: #f1f5f9;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            margin-right: 12px;
            flex-shrink: 0;
        }
        
        .popular-rank.top {
            background: var(--primary-color);
            color: white;
        }
        
        .popular-content {
            flex: 1;
        }
        
        .popular-title {
            font-weight: 500;
            font-size: 14px;
            line-height: 1.4;
            margin-bottom: 6px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .popular-meta {
            font-size: 12px;
            color: var(--text-secondary);
            display: flex;
            gap: 10px;
        }
        
        /* 分类侧边栏 */
        .category-list {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        
        .category-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            background: #f8fafc;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            text-decoration: none;
            color: var(--text-primary);
        }
        
        .category-item:hover {
            background: #f0f7ff;
            border-color: var(--primary-color);
            transform: translateX(4px);
        }
        
        .category-name {
            font-weight: 500;
            font-size: 15px;
        }
        
        .category-count {
            padding: 4px 10px;
            background: #e2e8f0;
            border-radius: 12px;
            font-size: 12px;
            font-weight: 600;
            color: var(--text-secondary);
        }
        
        /* 标签云侧边栏 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .tag-item {
            padding: 8px 14px;
            background: #f1f5f9;
            border: 1px solid var(--border-color);
            border-radius: 20px;
            font-size: 13px;
            color: var(--text-secondary);
            transition: all 0.3s;
            text-decoration: none;
        }
        
        .tag-item:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
            transform: translateY(-2px);
        }
        
        /* 页脚 */
        .site-footer {
            background: #1e293b;
            color: #cbd5e1;
            padding: 10px 0 25px;
            margin-top: 60px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid #334155;
            color: #94a3b8;
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 1100px) {
            body .header-search {
                display: none;
            }
            
            .nav-link span {
                display: none;
            }
            
            .nav-link i {
                margin-right: 0;
                font-size: 18px;
            }
            
            .nav-link {
                padding: 16px 10px;
                font-size: 0;
            }
            
            .featured-title {
                font-size: 22px;
            }
        }
        
        @media (max-width: 992px) {
            .header-content {
                flex-direction: row;
                align-items: center;
                gap: 15px;
            }
            
            .logo-area {
                order: 1;
                flex: 1;
            }
            
            .mobile-search-btn {
                order: 2;
                display: block;
            }
            
            .mobile-menu-toggle {
                order: 3;
                display: block;
            }
            
            .article-main-layout {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            
            .featured-article {
                grid-template-columns: 1fr;
            }
            
            .featured-image {
                height: 250px;
                border-left: none;
                border-top: 1px solid var(--border-color);
            }
            
            .featured-content {
                padding: 25px;
            }
        }
        
        @media (max-width: 768px) {
            .main-nav {
                display: none;
            }
            
            .page-title {
                font-size: 26px;
            }
            
            .page-description {
                font-size: 15px;
            }
            
            .article-filter {
                flex-direction: column;
                align-items: flex-start;
                gap: 15px;
            }
            
            .article-sort {
                width: 100%;
                justify-content: space-between;
            }
            
            .article-card-header {
                padding: 18px 20px 0;
            }
            
            .article-card-body {
                padding: 16px 20px 18px;
            }
            
            .article-title {
                font-size: 20px;
            }
            
            .featured-title {
                font-size: 20px;
            }
            
            .featured-content {
                padding: 20px;
            }
        }
        
        @media (max-width: 576px) {
            .page-title {
                font-size: 24px;
            }
            
            .filter-tabs {
                width: 100%;
                justify-content: center;
            }
            
            .article-title {
                font-size: 18px;
            }
            
            .article-excerpt {
                font-size: 14px;
                -webkit-line-clamp: 2;
            }
            
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
            
            .read-more {
                width: 100%;
                text-align: center;
            }
            
            .featured-title {
                font-size: 18px;
            }
            
            .featured-excerpt {
                font-size: 14px;
                -webkit-line-clamp: 3;
                display: -webkit-box;
                overflow: hidden;
                text-overflow: ellipsis;
            }
            
            .pagination {
                flex-wrap: wrap;
                justify-content: center;
            }
        }
        
        @media (max-width: 480px) {
            .page-title {
                font-size: 22px;
            }
            
            .article-title {
                font-size: 17px;
            }
            
            .article-category {
                font-size: 12px;
                padding: 5px 12px;
            }
            
            .article-date {
                font-size: 13px;
            }
            
            .featured-badge {
                font-size: 12px;
                padding: 5px 12px;
            }
            
            .featured-title {
                font-size: 17px;
            }
            
            .popular-title {
                font-size: 13px;
            }
            
            .category-name {
                font-size: 14px;
            }
        }