/* 页面标题区 */
        .page-header {
            background: linear-gradient(rgba(30, 58, 138, 0.9), rgba(30, 58, 138, 0.8)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&auto=format&fit=crop&w=1600&q=80');
            background-size: cover;
            background-position: center;
            color: white;
            padding: 120px 0;
        }
        
        @media (max-width: 992px) {
            .page-header {
                padding: 80px 0 60px;
            }
        }
        
        .page-title {
            font-size: 3rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        @media (max-width: 768px) {
            .page-title {
                font-size: 2.2rem;
            }
        }
        
        .page-subtitle {
            font-size: 1.2rem;
            opacity: 0.9;
            max-width: 700px;
            margin: 0 auto;
        }
        
        /* 面包屑导航 */
        .breadcrumb {
            background-color: transparent;
            padding: 0;
            margin-bottom: 2rem;
        }
        
        .breadcrumb-item a {
            color: rgba(255, 255, 255, 0.8);
            text-decoration: none;
        }
        
        .breadcrumb-item.active {
            color: white;
        }
        
        /* 主要内容区 */
        .content-section {
            padding: 5rem 0;
        }
        
        .section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: #1E3A8A;
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 2rem;
            }
        }
        
        .section-subtitle {
            font-size: 1.2rem;
            color: #6B7280;
            margin-bottom: 3rem;
            max-width: 700px;
        }
        
        /* 分类导航 */
        .category-nav {
            background-color: #F9FAFB;
            border-radius: 10px;
            padding: 2rem;
            margin-bottom: 3rem;
        }
        
        .category-title {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 1.5rem;
            color: #1E3A8A;
        }
        
        .category-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .category-item {
            margin-bottom: 0.8rem;
        }
        
        .category-link {
            color: var(--dark-gray);
            text-decoration: none;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            display: block;
            transition: all 0.2s;
        }
        
        .category-link:hover, .category-link.active {
            background-color: white;
            color: #1E3A8A;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }
        
        .category-badge {
            background-color: #0EA5E9;
            color: white;
            font-size: 0.8rem;
            padding: 0.2rem 0.6rem;
            border-radius: 12px;
            margin-left: 0.5rem;
        }
        
        /* 文章卡片 */
        .article-card {
            border: 1px solid #E5E7EB;
            border-radius: 10px;
            overflow: hidden;
            transition: all 0.3s;
            height: 100%;
            background-color: white;
        }
        
        .article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
            border-color: #0EA5E9;
        }
        
        .article-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }
        
        .article-body {
            padding: 1.5rem;
        }
        
        .article-category {
            font-size: 0.85rem;
            font-weight: 600;
            color: #0EA5E9;
            margin-bottom: 0.8rem;
            display: inline-block;
            text-transform: uppercase;
        }
        
        .article-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 1rem;
            line-height: 1.4;
        }
        
        .article-title a {
            color: var(--dark-gray);
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .article-title a:hover {
            color: #1E3A8A;
        }
        
        .article-excerpt {
            color: #6B7280;
            margin-bottom: 1.5rem;
            line-height: 1.6;
        }
        
        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #6B7280;
            font-size: 0.9rem;
            border-top: 1px solid #E5E7EB;
            padding-top: 1rem;
        }
        
        .article-date {
            display: flex;
            align-items: center;
        }
        
        .article-date i {
            margin-right: 0.3rem;
        }
        
        .article-read-more {
            color: #0EA5E9;
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
        }
        
        .article-read-more:hover {
            color: #1E3A8A;
            text-decoration: underline;
        }
        
        /* 特色文章 */
        .featured-article {
            border-radius: 15px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
            margin-bottom: 3rem;
        }
        
        .featured-img {
            width: 100%;
            height: 400px;
            object-fit: cover;
        }
        
        @media (max-width: 768px) {
            .featured-img {
                height: 250px;
            }
        }
        
        .featured-body {
            padding: 2.5rem;
            background-color: white;
        }
        
        .featured-category {
            font-size: 0.9rem;
            font-weight: 600;
            color: white;
            background-color: #0EA5E9;
            padding: 0.3rem 1rem;
            border-radius: 20px;
            display: inline-block;
            margin-bottom: 1rem;
        }
        
        .featured-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            line-height: 1.3;
        }
        
        .featured-title a {
            color: var(--dark-gray);
            text-decoration: none;
            transition: color 0.2s;
        }
        
        .featured-title a:hover {
            color: #1E3A8A;
        }
        
        .featured-excerpt {
            font-size: 1.1rem;
            color: #6B7280;
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        
        /* 侧边栏 */
        .sidebar {
            position: sticky;
            top: 100px;
        }
        
        .sidebar-card {
            background-color: white;
            border: 1px solid #E5E7EB;
            border-radius: 10px;
            padding: 1.5rem;
            margin-bottom: 2rem;
        }
        
        .sidebar-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 1.5rem;
            color: #1E3A8A;
            padding-bottom: 0.8rem;
            border-bottom: 2px solid #F9FAFB;
        }
        
        .popular-articles {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        
        .popular-item {
            margin-bottom: 1.2rem;
            padding-bottom: 1.2rem;
            border-bottom: 1px solid #E5E7EB;
        }
        
        .popular-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .popular-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
            line-height: 1.4;
        }
        
        .popular-title a {
            color: var(--dark-gray);
            text-decoration: none;
            transition: color 0.2s;
            font-size:1rem;
        }
        
        .popular-title a:hover {
            color: #1E3A8A;
        }
        
        .popular-meta {
            font-size: 0.85rem;
            color: #6B7280;
            display: flex;
            justify-content: space-between;
        }
        
        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .tag {
            background-color: #F9FAFB;
            color: #6B7280;
            padding: 0.4rem 0.9rem;
            border-radius: 20px;
            font-size: 0.9rem;
            text-decoration: none;
            transition: all 0.2s;
        }
        
        .tag:hover {
            background-color: #0EA5E9;
            color: white;
        }
        
        /* 搜索框 */
        .search-box {
            position: relative;
        }
        
        .search-input {
            width: 100%;
            padding: 0.75rem 1rem 0.75rem 3rem;
            border: 1px solid #E5E7EB;
            border-radius: 8px;
            font-size: 1rem;
            transition: all 0.2s;
        }
        
        .search-input:focus {
            border-color: #0EA5E9;
            box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
            outline: none;
        }
        
        .search-icon {
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
            color: #6B7280;
        }
        
        /* 分页 */
        .pagination {
            justify-content: center;
            margin-top: 3rem;
        }
        
        .page-link {
            color: #1E3A8A;
            border: 1px solid #E5E7EB;
            padding: 0.5rem 1rem;
            margin: 0 0.2rem;
            border-radius: 6px;
        }
        
        .page-link:hover {
            background-color: #F9FAFB;
            border-color: #0EA5E9;
        }
        
        .page-item.active .page-link {
            background-color: #1E3A8A;
            border-color: #1E3A8A;
            color: white;
        }
        
        /* 订阅区块 */
        .subscribe-card {
            background: linear-gradient(135deg, #1E3A8A, #0EA5E9);
            color: white;
            border-radius: 10px;
            padding: 2rem;
            text-align: center;
        }
        
        .subscribe-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        /* 按钮样式 */
        .btn-primary {
            background-color: #1E3A8A;
            border-color: #1E3A8A;
            padding: 0.75rem 2rem;
            font-weight: 500;
            border-radius: 8px;
        }
        
        .btn-primary:hover {
            background-color: #1e3a8ae6;
            border-color: #1e3a8ae6;
        }
        
        .btn-outline-primary {
            border-radius: 8px;
            padding: 0.75rem 2rem;
            font-weight: 500;
        }
        
       
        
        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .fade-in-up {
            animation: fadeInUp 0.6s ease-out;
        }
        
        /* 响应式调整 */
        @media (max-width: 768px) {
            .sidebar {
                margin-top: 3rem;
            }
            
            .featured-title {
                font-size: 1.7rem;
            }
        }