* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: #333;
            background-color: #0a0e27;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* 头部样式 */
        header {
            background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
            color: white;
            padding: 15px 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .logo {
            display: flex;
            align-items: center;
            font-size: 28px;
            font-weight: bold;
            text-decoration: none;
            color: white;
        }
        
        .logo i {
            margin-right: 10px;
            font-size: 35px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .search-box {
            position: relative;
            flex: 1;
            max-width: 500px;
        }
        
        .search-box input {
            width: 100%;
            padding: 12px 45px 12px 15px;
            border: none;
            border-radius: 25px;
            outline: none;
            font-size: 16px;
            background: rgba(255,255,255,0.1);
            color: white;
        }
        
        .search-box input::placeholder {
            color: rgba(255,255,255,0.6);
        }
        
        .search-box button {
            position: absolute;
            right: 5px;
            top: 50%;
            transform: translateY(-50%);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 50%;
            width: 35px;
            height: 35px;
            cursor: pointer;
            font-size: 14px;
        }
        
        .user-info {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .user-info a {
            color: white;
            text-decoration: none;
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 5px;
            transition: all 0.3s ease;
        }
        
        .user-info a:hover {
            color: #667eea;
        }
        
        /* 导航样式 */
        nav {
            background: rgba(22, 33, 62, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: 0 2px 10px rgba(0,0,0,0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .nav-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
            gap: 5px;
        }
        
        .nav-menu li a {
            display: block;
            padding: 15px 20px;
            text-decoration: none;
            color: white;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .nav-menu li a:hover {
            background: rgba(102, 126, 234, 0.3);
            color: #667eea;
        }
        
        .nav-menu li.active a {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            color: white;
            cursor: pointer;
            padding: 10px;
        }
        
        /* Banner样式 */
        .banner {
            background: linear-gradient(rgba(10, 14, 39, 0.8), rgba(10, 14, 39, 0.8)), url('https://picsum.photos/id/1016/1200/400') center/cover no-repeat;
            color: white;
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        
        .banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
            opacity: 0.1;
            animation: shimmer 3s infinite;
        }
        
        @keyframes shimmer {
            0%, 100% { opacity: 0.1; }
            50% { opacity: 0.2; }
        }
        
        .banner h1 {
            font-size: 42px;
            margin-bottom: 20px;
            animation: fadeInUp 1s ease;
            position: relative;
            z-index: 1;
        }
        
        .banner p {
            font-size: 20px;
            margin-bottom: 30px;
            animation: fadeInUp 1s ease 0.3s both;
            position: relative;
            z-index: 1;
        }
        
        .banner .btn {
            display: inline-block;
            padding: 15px 40px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            text-decoration: none;
            border-radius: 30px;
            font-weight: bold;
            font-size: 18px;
            transition: all 0.3s ease;
            animation: fadeInUp 1s ease 0.6s both;
            position: relative;
            z-index: 1;
        }
        
        .banner .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.4);
        }
        
        /* 动画效果 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        /* 主要内容区 */
        .main-content {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 20px;
            padding: 30px 0;
        }
        
        /* 视频分类区 */
        .video-categories {
            background: rgba(255,255,255,0.05);
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .section-title {
            font-size: 24px;
            margin-bottom: 25px;
            color: white;
            padding-bottom: 15px;
            border-bottom: 2px solid #667eea;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .section-title i {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 15px;
        }
        
        .category-item {
            text-align: center;
            padding: 20px;
            background: rgba(255,255,255,0.08);
            border-radius: 12px;
            transition: all 0.3s ease;
            text-decoration: none;
            color: white;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .category-item:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            border-color: transparent;
        }
        
        .category-item i {
            font-size: 36px;
            margin-bottom: 10px;
            display: block;
        }
        
        /* 最新更新区 */
        .latest-updates {
            background: rgba(255,255,255,0.05);
            border-radius: 15px;
            padding: 25px;
            margin-bottom: 25px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .video-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 20px;
        }
        
        .video-item {
            background: rgba(255,255,255,0.08);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .video-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
            border-color: #667eea;
        }
        
        .video-cover {
            width: 100%;
            height: 280px;
            object-fit: cover;
            position: relative;
        }
        
        .video-cover::after {
            content: '\f04b';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 60px;
            color: rgba(255,255,255,0.8);
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .video-item:hover .video-cover::after {
            opacity: 1;
        }
        
        .video-info {
            padding: 18px;
        }
        
        .video-title {
            font-size: 16px;
            font-weight: bold;
            margin-bottom: 10px;
            color: white;
            text-decoration: none;
            display: block;
            line-height: 1.4;
        }
        
        .video-title:hover {
            color: #667eea;
        }
        
        .video-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            color: rgba(255,255,255,0.7);
        }
        
        .video-rating {
            color: #ffd700;
        }
        
        /* 热门视频区 */
        .hot-videos {
            background: rgba(255,255,255,0.05);
            border-radius: 15px;
            padding: 25px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        /* 侧边栏样式 */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        
        .sidebar-section {
            background: rgba(255,255,255,0.05);
            border-radius: 15px;
            padding: 20px;
            border: 1px solid rgba(255,255,255,0.1);
        }
        
        .sidebar-title {
            font-size: 18px;
            margin-bottom: 15px;
            color: white;
            padding-bottom: 10px;
            border-bottom: 2px solid #667eea;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .sidebar-title i {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        /* 排行榜样式 */
        .rank-list {
            list-style: none;
        }
        
        .rank-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
            transition: all 0.3s ease;
        }
        
        .rank-item:hover {
            background: rgba(255,255,255,0.08);
            padding-left: 8px;
        }
        
        .rank-item:last-child {
            border-bottom: none;
        }
        
        .rank-number {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            font-weight: bold;
        }
        
        .rank-item:nth-child(1) .rank-number { background: linear-gradient(135deg, #ff6b6b 0%, #ee5a6f 100%); }
        .rank-item:nth-child(2) .rank-number { background: linear-gradient(135deg, #ffa500 0%, #ff8c00 100%); }
        .rank-item:nth-child(3) .rank-number { background: linear-gradient(135deg, #27ae60 0%, #2ecc71 100%); }
        
        .rank-info {
            flex: 1;
        }
        
        .rank-title {
            font-size: 14px;
            color: white;
            text-decoration: none;
            display: block;
            margin-bottom: 5px;
            transition: color 0.3s ease;
        }
        
        .rank-title:hover {
            color: #667eea;
        }
        
        .rank-meta {
            font-size: 12px;
            color: rgba(255,255,255,0.6);
        }
        
        /* 页脚样式 */
        footer {
            background: rgba(10, 14, 39, 0.95);
            color: white;
            padding: 50px 0 25px 0;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 35px;
            margin-bottom: 35px;
        }
        
        .footer-section h3 {
            margin-bottom: 18px;
            color: white;
            font-size: 18px;
        }
        
        .footer-section p {
            line-height: 1.8;
            color: rgba(255,255,255,0.7);
            font-size: 14px;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: rgba(255,255,255,0.7);
            text-decoration: none;
            transition: color 0.3s ease;
            font-size: 14px;
        }
        
        .footer-links a:hover {
            color: #667eea;
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 18px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 45px;
            height: 45px;
            background: rgba(255,255,255,0.1);
            color: white;
            border-radius: 50%;
            transition: all 0.3s ease;
            text-decoration: none;
            border: 1px solid rgba(255,255,255,0.2);
        }
        
        .social-links a:hover {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            transform: translateY(-3px);
            border-color: transparent;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 25px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: rgba(255,255,255,0.6);
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }
            
            .sidebar {
                order: -1;
            }
        }
        
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
                text-align: center;
            }
            
            .search-box {
                max-width: 100%;
                width: 100%;
            }
            
            .nav-content {
                flex-direction: column;
            }
            
            .nav-menu {
                justify-content: center;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .nav-menu {
                display: none;
                width: 100%;
                text-align: center;
            }
            
            .nav-menu.active {
                display: flex;
            }
            
            .banner h1 {
                font-size: 32px;
            }
            
            .banner p {
                font-size: 18px;
            }
            
            .category-grid {
                grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
            }
            
            .video-grid {
                grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            }
        }
        
        @media (max-width: 576px) {
            .banner {
                padding: 60px 0;
            }
            
            .banner h1 {
                font-size: 28px;
            }
            
            .category-item {
                padding: 15px;
            }
            
            .video-item {
                margin-bottom: 15px;
            }
            
            .video-cover {
                height: 220px;
            }
        }