*{margin:0;padding:0;box-sizing:border-box;}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;line-height:1.6;color:#333;background:#f5f5f5;}.container{max-width:1200px;margin:0 auto;padding:0 20px;}header{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,0.1);position:sticky;top:0;z-index:1000;}nav{padding:15px 0;}nav ul{display:flex;list-style:none;justify-content:center;align-items:center;gap:30px;}nav a{text-decoration:none;color:#333;font-weight:500;transition:color 0.3s;}nav a:hover{color:#1890ff;}.logo{font-size:24px;font-weight:bold;color:#1890ff;text-decoration:none;}main{padding:40px 0;min-height:60vh;}.hero{background:#fff;padding:60px 40px;border-radius:8px;margin-bottom:40px;text-align:center;}.hero h1{font-size:2.5rem;margin-bottom:20px;color:#1890ff;line-height:1.3;}.hero p{font-size:1.1rem;color:#666;max-width:800px;margin:0 auto;}.section{background:#fff;padding:40px;border-radius:8px;margin-bottom:30px;}.section h2{font-size:1.8rem;margin-bottom:25px;padding-bottom:15px;border-bottom:3px solid #1890ff;}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:25px;}.video-card{background:#fff;border:1px solid #e8e8e8;border-radius:8px;padding:20px;transition:all 0.3s;cursor:pointer;}.video-card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.15);transform:translateY(-3px);}.video-card h3{font-size:1.3rem;margin-bottom:12px;color:#333;}.video-card .meta{color:#999;font-size:0.9rem;margin-bottom:10px;}.video-card .one-line{color:#666;margin-bottom:10px;line-height:1.5;}.video-card .excerpt{color:#888;font-size:0.9rem;line-height:1.5;}.video-card a{text-decoration:none;color:inherit;}.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}.tag{background:#f0f0f0;padding:4px 12px;border-radius:4px;font-size:0.85rem;color:#666;}.video-detail{background:#fff;padding:40px;border-radius:8px;}.video-detail h1{font-size:2.2rem;margin-bottom:20px;color:#333;}.video-info{display:flex;flex-wrap:wrap;gap:20px;margin-bottom:30px;padding:20px;background:#f9f9f9;border-radius:8px;}.video-info-item{display:flex;gap:8px;}.video-info-item strong{color:#666;}.video-summary{margin-bottom:30px;line-height:1.8;font-size:1.05rem;}.video-review{background:#f0f8ff;padding:20px;border-left:4px solid #1890ff;margin-bottom:30px;border-radius:4px;}.related-videos{margin-top:40px;}.related-videos h2{font-size:1.6rem;margin-bottom:20px;}.breadcrumb{margin-bottom:20px;font-size:0.9rem;color:#666;}.breadcrumb a{color:#1890ff;text-decoration:none;}.breadcrumb a:hover{text-decoration:underline;}footer{background:#333;color:#fff;text-align:center;padding:30px 0;margin-top:60px;}.intro-text{line-height:1.8;color:#666;margin:20px 0;}@media (max-width:768px){nav ul{flex-wrap:nowrap;justify-content:space-between;gap:0;padding:0 10px;}nav li{flex:1 1 0;min-width:0;text-align:center;}nav a{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:0.85rem;padding:0 5px;}.hero h1{font-size:1.8rem;}.video-grid{grid-template-columns:1fr;}.section{padding:20px;}.video-detail{padding:20px;}}