*{margin:0;padding:0;box-sizing:border-box;}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,sans-serif;background-color:#1a1a1a;color:#e8e8e8;line-height:1.6;font-size:16px;}a{color:#ff4444;text-decoration:none;transition:all 0.3s ease;}a:hover{color:#ff6666;text-decoration:underline;}img{max-width:100%;height:auto;display:block;}nav{background:#111;padding:1rem 2rem;border-bottom:2px solid #ff4444;position:sticky;top:0;z-index:1000;}nav ul{list-style:none;display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:0.5rem;}nav li{flex:1 1 0;min-width:0;text-align:center;}nav a{display:block;padding:0.5rem;color:#e8e8e8;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:all 0.3s ease;}nav a:hover,nav a.active{background:#ff4444;color:#fff;text-decoration:none;}@media (max-width:768px){nav{padding:0.75rem 1rem;}nav ul{flex-wrap:nowrap;overflow-x:visible;}nav li{flex:1 1 0;min-width:0;}nav a{font-size:0.8rem;padding:0.4rem 0.2rem;}}.container{max-width:1400px;margin:0 auto;padding:2rem;}.breadcrumb{padding:1rem 2rem;background:#222;font-size:0.9rem;margin-bottom:1rem;}.breadcrumb a{color:#aaa;}.breadcrumb a:hover{color:#ff4444;}.breadcrumb span{margin:0 0.5rem;color:#666;}h1{font-size:2.5rem;margin-bottom:1.5rem;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,0.5);}h2{font-size:1.8rem;margin:2rem 0 1rem;color:#ff4444;border-left:4px solid #ff4444;padding-left:1rem;}h3{font-size:1.3rem;margin:1.5rem 0 1rem;color:#e8e8e8;}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:1.5rem;margin:2rem 0;}@media (max-width:768px){.video-grid{grid-template-columns:repeat(2,1fr);gap:1rem;}}@media (max-width:480px){.video-grid{grid-template-columns:1fr;}}.video-card{background:#222;border:1px solid #333;border-radius:8px;overflow:hidden;transition:all 0.3s ease;cursor:pointer;}.video-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px rgba(255,68,68,0.3);border-color:#ff4444;}.video-card-content{padding:1rem;}.video-card h3{font-size:1.1rem;margin:0 0 0.5rem;color:#fff;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}.video-meta{font-size:0.85rem;color:#999;margin-bottom:0.5rem;}.video-meta span{margin-right:1rem;}.video-desc{font-size:0.9rem;color:#ccc;line-height:1.5;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}.video-tags{margin-top:0.75rem;display:flex;flex-wrap:wrap;gap:0.4rem;}.tag{display:inline-block;padding:0.2rem 0.6rem;background:#333;border:1px solid #444;border-radius:12px;font-size:0.75rem;color:#aaa;}.video-detail{background:#222;border-radius:8px;padding:2rem;margin:2rem 0;}.detail-info{margin:1.5rem 0;padding:1rem;background:#1a1a1a;border-left:4px solid #ff4444;}.detail-info p{margin:0.75rem 0;line-height:1.8;}.detail-info strong{color:#ff4444;margin-right:0.5rem;}.summary-box{background:#1a1a1a;padding:1.5rem;margin:1.5rem 0;border-radius:4px;line-height:1.8;}.review-box{background:#2a2a2a;padding:1.5rem;margin:1.5rem 0;border-radius:4px;border-left:4px solid #ff4444;font-style:italic;line-height:1.8;}.related-videos{margin-top:3rem;}.intro-section{background:#222;padding:2rem;margin:2rem 0;border-radius:8px;line-height:1.8;}.intro-section p{margin:1rem 0;color:#ccc;}.btn{display:inline-block;padding:0.75rem 1.5rem;background:#ff4444;color:#fff;border:none;border-radius:4px;cursor:pointer;transition:all 0.3s ease;font-size:1rem;}.btn:hover{background:#ff6666;transform:translateY(-2px);box-shadow:0 4px 12px rgba(255,68,68,0.4);text-decoration:none;}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;}.section-header .more-link{font-size:0.9rem;color:#aaa;}footer{background:#111;padding:2rem;margin-top:4rem;text-align:center;color:#666;border-top:2px solid #ff4444;}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:50px;height:50px;background:#ff4444;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s ease;z-index:999;}.back-to-top.visible{opacity:1;visibility:visible;}.back-to-top:hover{background:#ff6666;transform:translateY(-3px);}