/* 基础样式 */
    * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
    }
    
    body {
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        line-height: 1.6;
        color: #333;
        background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }
    
    /* 头部导航 */
    header {
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: 0 2px 20px rgba(0,0,0,0.1);
        position: sticky;
        top: 0;
        z-index: 1000;
        border-bottom: 1px solid rgba(0,0,0,0.05);
    }
    
    .navbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 20px;
        height: 70px;
    }
    
    .logo {
        font-size: 1.8rem;
        font-weight: 800;
        color: #2c3e50;
        text-decoration: none;
        display: flex;
        align-items: center;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        transition: transform 0.3s;
    }
    
    .logo:hover {
        transform: scale(1.05);
    }
    
    .logo i {
        margin-right: 10px;
        font-size: 2rem;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    
    .nav-content {
        display: flex;
        align-items: center;
        gap: 30px;
        flex: 1;
        justify-content: flex-end;
    }
    
    nav ul {
        display: flex;
        list-style: none;
    }
    
    nav li {
        margin-left: 1.5rem;
        position: relative;
    }
    
    nav a {
        display: block;
        padding: 10px 0;
        text-decoration: none;
        color: #555;
        font-weight: 600;
        transition: all 0.3s;
        position: relative;
        font-size: 1rem;
    }
    
    nav a:hover {
        color: #667eea;
        transform: translateY(-2px);
    }
    
    nav a.active {
        color: #667eea;
    }
    
    nav a.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 3px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        border-radius: 3px;
        animation: slideIn 0.3s ease-out;
    }
    
    @keyframes slideIn {
        from { width: 0; left: 50%; }
        to { width: 100%; left: 0; }
    }
    
    /* 导航栏搜索框 */
    .nav-search {
        position: relative;
        width: 300px;
    }
    
    .nav-search-input {
        width: 100%;
        padding: 12px 45px 12px 18px;
        border: 2px solid rgba(102, 126, 234, 0.2);
        border-radius: 30px;
        font-size: 14px;
        transition: all 0.3s;
        background: rgba(255, 255, 255, 0.9);
        box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
    }
    
    .nav-search-input:focus {
        outline: none;
        border-color: #667eea;
        background: white;
        box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
        transform: translateY(-1px);
    }
    
    .nav-search-button {
        position: absolute;
        right: 15px;
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        color: #667eea;
        cursor: pointer;
        padding: 5px;
        font-size: 16px;
        transition: transform 0.3s;
    }
    
    .nav-search-button:hover {
        transform: translateY(-50%) scale(1.1);
    }
    
    /* 主要内容区域 */
    main {
        flex: 1;
        max-width: 1400px;
        margin: 30px auto;
        padding: 0 20px;
        width: 100%;
    }
    
    /* 页面标题 */
    .page-header {
        margin-bottom: 40px;
        text-align: center;
        position: relative;
    }
    
    .page-title {
        font-size: 2.5rem;
        font-weight: 800;
        color: #2c3e50;
        margin-bottom: 15px;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        text-shadow: 0 2px 10px rgba(102, 126, 234, 0.1);
    }
    
    .page-subtitle {
        color: #7f8c8d;
        font-size: 1.1rem;
        max-width: 700px;
        margin: 0 auto;
        line-height: 1.8;
    }
    
    /* 内容网格布局 */
    .content-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
        gap: 30px;
        margin-bottom: 50px;
    }
    
    /* 内容卡片样式 */
    .content-card {
        background: white;
        border-radius: 16px;
        overflow: hidden;
        box-shadow: 0 10px 30px rgba(50, 50, 93, 0.1), 0 1px 3px rgba(0, 0, 0, 0.08);
        transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        cursor: pointer;
        display: flex;
        flex-direction: column;
        height: 100%;
        border: 1px solid rgba(0,0,0,0.05);
        text-decoration: none;
        color: inherit;
    }
    
    .content-card:hover {
        transform: translateY(-8px);
        box-shadow: 0 20px 40px rgba(50, 50, 93, 0.15), 0 15px 35px rgba(0, 0, 0, 0.1);
        text-decoration: none;
        color: inherit;
    }
    
    .content-cover-container {
        position: relative;
        overflow: hidden;
        height: 200px;
    }
    
    .content-cover {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.6s ease;
    }
    
    .content-card:hover .content-cover {
        transform: scale(1.05);
    }
    
    .content-info {
        padding: 25px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    
    .content-title {
        font-size: 1.3rem;
        font-weight: 700;
        margin-bottom: 15px;
        line-height: 1.4;
        color: #2c3e50;
        flex: 1;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .content-description {
        color: #666;
        font-size: 14px;
        line-height: 1.6;
        margin-bottom: 20px;
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    .content-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: auto;
        padding-top: 15px;
        border-top: 1px solid rgba(0,0,0,0.05);
    }
    
    .content-badges {
        display: flex;
        gap: 8px;
        flex-wrap: wrap;
    }
    
    .content-badge {
        display: inline-flex;
        align-items: center;
        padding: 6px 12px;
        border-radius: 20px;
        font-size: 12px;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.5px;
        box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    }
    
    .badge-channel {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
    }
    
    .badge-type {
        background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
        color: white;
    }
    
    .badge-category {
        background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
        color: white;
    }
    
    .content-date {
        font-size: 13px;
        color: #95a5a6;
        white-space: nowrap;
        font-weight: 500;
    }
    
    /* 外部链接指示器 */
    .external-link-indicator {
        position: absolute;
        top: 15px;
        right: 15px;
        background: rgba(255, 255, 255, 0.9);
        width: 36px;
        height: 36px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        color: #667eea;
        opacity: 0;
        transform: translateY(-10px);
        transition: all 0.3s;
        z-index: 2;
    }
    
    .content-card:hover .external-link-indicator {
        opacity: 1;
        transform: translateY(0);
    }
    
    /* 分页 */
    .pagination {
        display: flex;
        justify-content: center;
        align-items: center;
        gap: 10px;
        margin-top: 50px;
        flex-wrap: wrap;
    }
    
    .page-btn {
        padding: 10px 16px;
        background: white;
        border: 2px solid rgba(102, 126, 234, 0.2);
        border-radius: 8px;
        cursor: pointer;
        font-weight: 600;
        min-width: 40px;
        text-align: center;
        transition: all 0.3s;
        box-shadow: 0 4px 6px rgba(50, 50, 93, 0.11), 0 1px 3px rgba(0, 0, 0, 0.08);
    }
    
    .page-btn:hover:not(.disabled) {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border-color: transparent;
        transform: translateY(-2px);
    }
    
    .page-btn.active {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        border-color: transparent;
        box-shadow: 0 7px 14px rgba(50, 50, 93, 0.1), 0 3px 6px rgba(0, 0, 0, 0.08);
    }
    
    .page-btn.disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none !important;
    }
    
    /* 加载和空状态 */
    .loading, .empty, .error {
        text-align: center;
        padding: 80px;
        color: #6c757d;
        font-size: 18px;
        grid-column: 1 / -1;
        background: white;
        border-radius: 16px;
        box-shadow: 0 10px 30px rgba(50, 50, 93, 0.1);
    }
    
    .loading::after {
        content: '...';
        animation: dots 1.5s infinite;
    }
    
    @keyframes dots {
        0%, 20% { content: '.'; }
        40% { content: '..'; }
        60%, 100% { content: '...'; }
    }
    
    /* 页脚 */
    footer {
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        color: white;
        text-align: center;
        padding: 40px;
        margin-top: 80px;
        position: relative;
        overflow: hidden;
    }
    
    footer::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        height: 5px;
        background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    }
    
    .footer-content {
        max-width: 1200px;
        margin: 0 auto;
        position: relative;
        z-index: 1;
    }
    
    .footer-logo {
        font-size: 1.8rem;
        font-weight: 800;
        margin-bottom: 15px;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu-btn {
        display: none;
        background: none;
        border: none;
        font-size: 24px;
        color: #667eea;
        cursor: pointer;
        padding: 5px;
    }
    
    /* 响应式设计 */
    @media (max-width: 1200px) {
        .nav-search {
            width: 250px;
        }
        
        .content-grid {
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
        }
        
        .page-title {
            font-size: 2.2rem;
        }
    }
    
    @media (max-width: 992px) {
        .navbar {
            height: auto;
            padding: 15px 20px;
            flex-wrap: wrap;
        }
        
        .mobile-menu-btn {
            display: block;
        }
        
        .nav-content {
            display: none;
            width: 100%;
            flex-direction: column;
            align-items: stretch;
            gap: 20px;
            margin-top: 20px;
            padding: 20px;
            background: white;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(50, 50, 93, 0.1);
        }
        
        .nav-content.active {
            display: flex;
        }
        
        nav ul {
            flex-direction: column;
            width: 100%;
        }
        
        nav li {
            margin: 0;
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }
        
        nav li:last-child {
            border-bottom: none;
        }
        
        nav a {
            padding: 15px 0;
        }
        
        .nav-search {
            width: 100%;
        }
        
        .page-title {
            font-size: 2rem;
        }
    }
    
    @media (max-width: 768px) {
        .content-grid {
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        
        .page-title {
            font-size: 1.8rem;
        }
    }
    
    @media (max-width: 480px) {
        .content-grid {
            grid-template-columns: 1fr;
        }
        
        .page-title {
            font-size: 1.6rem;
        }
    }