* { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif; background: #f5f5f5; color: #333; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        /* 头部 */
        .header { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 15px 0; position: sticky; top: 0; z-index: 1000; }
        .header-inner { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 15px; }
        .logo { display: flex; align-items: center; gap: 10px; font-size: 16px; font-weight: bold; color: white; text-decoration: none; }
        .logo img { height: 40px; }
        .nav { display: flex; gap: 25px; flex-wrap: wrap; }
        .nav a { color: white; text-decoration: none; font-weight: 500; }
        
        /* 搜索框 */
        .search-box { background: white; padding: 20px 0; }
        .search-form { display: flex; gap: 10px; }
        .search-input { flex: 1; padding: 12px 15px; border: 1px solid #ddd; border-radius: 4px; }
        .search-btn { padding: 12px 30px; background: #667eea; color: white; border: none; border-radius: 4px; cursor: pointer; font-weight: bold; }
        
        /* Hero */
        .hero { background: linear-gradient(135deg, #667eea 0%, #764ba2 100%); color: white; padding: 60px 0; text-align: center; }
        .hero h1 { font-size: 36px; margin-bottom: 15px; }
        .hero p { font-size: 16px; opacity: 0.9; }
        
        /* 区域 */
        .section { background: white; padding: 40px 0; margin: 20px 0; border-radius: 8px; }
        .section-title { text-align: center; margin-bottom: 30px; }
        .section-title h2 { font-size: 28px; margin-bottom: 10px; }
        .section-title p { color: #666; }
        
        /* 视频网格 */
        .video-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 20px; }
        
        /* 视频卡片 - 带播放按钮 */
        .video-card { background: white; border-radius: 8px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: transform 0.3s; cursor: pointer; }
        .video-card:hover { transform: translateY(-5px); }
        .video-thumb { position: relative; width: 100%; padding-bottom: 56.25%; background: #000; overflow: hidden; }
        .video-thumb img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
        
        /* 播放按钮 */
        .play-btn { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 60px; height: 60px; background: rgba(0,0,0,0.7); border-radius: 50%; display: flex; align-items: center; justify-content: center; opacity: 0; transition: opacity 0.3s; }
        .play-btn::after { content: ''; width: 0; height: 0; border-left: 20px solid white; border-top: 12px solid transparent; border-bottom: 12px solid transparent; margin-left: 5px; }
        .video-card:hover .play-btn { opacity: 1; }
        
        /* 视频时长 */
        .video-duration { position: absolute; bottom: 8px; right: 8px; background: rgba(0,0,0,0.8); color: white; padding: 2px 6px; border-radius: 3px; font-size: 12px; }
        
        .video-info { padding: 15px; }
        .video-title { font-size: 15px; font-weight: bold; margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .video-meta { display: flex; justify-content: space-between; font-size: 12px; color: #999; }
        
        /* 伪视频播放器弹窗 */
        .video-modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.9); z-index: 9999; align-items: center; justify-content: center; }
        .video-modal.active { display: flex; }
        .video-player { position: relative; width: 90%; max-width: 900px; background: #000; border-radius: 8px; overflow: hidden; }
        .video-player-inner { position: relative; width: 100%; padding-bottom: 56.25%; background: #111; }
        .video-player-inner img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; filter: brightness(0.7); }
        .video-loading { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); color: white; text-align: center; }
        .video-loading-spinner { width: 50px; height: 50px; border: 3px solid rgba(255,255,255,0.3); border-top-color: white; border-radius: 50%; animation: spin 1s linear infinite; margin: 0 auto 15px; }
        @keyframes spin { to { transform: rotate(360deg); } }
        .video-close { position: absolute; top: 15px; right: 15px; width: 40px; height: 40px; background: rgba(255,255,255,0.2); border: none; border-radius: 50%; color: white; font-size: 24px; cursor: pointer; z-index: 10; }
        .video-controls { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(0,0,0,0.8)); padding: 20px; }
        .video-progress { width: 100%; height: 4px; background: rgba(255,255,255,0.3); border-radius: 2px; margin-bottom: 10px; }
        .video-progress-bar { width: 35%; height: 100%; background: #667eea; border-radius: 2px; }
        .video-control-btns { display: flex; align-items: center; gap: 15px; color: white; }
        .video-control-btns button { background: none; border: none; color: white; font-size: 18px; cursor: pointer; }
        
        /* 功能卡片 */
        .feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px; }
        .feature-card { background: white; border-radius: 8px; padding: 25px; text-align: center; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
        .feature-icon { font-size: 40px; margin-bottom: 15px; }
        .feature-title { font-size: 18px; font-weight: bold; margin-bottom: 10px; }
        .feature-desc { font-size: 13px; color: #666; line-height: 1.6; }
        
        /* 页脚 */
        .footer { background: #333; color: white; padding: 50px 0 20px; margin-top: 40px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; margin-bottom: 30px; }
        .footer-section h3 { font-size: 16px; margin-bottom: 15px; border-bottom: 2px solid #667eea; padding-bottom: 10px; }
        .footer-link { display: block; color: #ccc; font-size: 13px; margin-bottom: 8px; text-decoration: none; }
        .footer-link:hover { color: white; }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #555; font-size: 12px; color: #999; }
        
        @media (max-width: 768px) {
            .header-inner { flex-direction: column; }
            .nav { gap: 15px; justify-content: center; }
            .hero h1 { font-size: 24px; }
            .video-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
        }