body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;background:#fff;color:#333;line-height:1.6;}a{color:#007bff;text-decoration:none;transition:color 0.2s;}a:hover{color:#0056b3;text-decoration:underline;}nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;padding:1rem 2rem;background:#f8f9fa;border-bottom:1px solid #dee2e6;}nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0.5rem 0.25rem;font-weight:500;color:#495057;}nav a:hover{color:#007bff;background:rgba(0,123,255,0.1);border-radius:4px;}main{max-width:1200px;margin:2rem auto;padding:0 1rem;}.breadcrumb{padding:0.5rem 0;font-size:0.9rem;color:#6c757d;margin-bottom:1rem;}.breadcrumb a{color:#6c757d;}.breadcrumb span{color:#333;}h1{font-size:2rem;margin-bottom:1rem;color:#212529;}h2{font-size:1.5rem;margin:2rem 0 1rem;color:#343a40;border-left:4px solid #007bff;padding-left:0.75rem;}h3{font-size:1.25rem;margin:0.5rem 0;}section{margin-bottom:3rem;}.intro p,.all-link p{font-size:1.1rem;line-height:1.8;}.video-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;list-style:none;padding:0;}.video-card{background:#f8f9fa;border-radius:8px;padding:1.25rem;transition:transform 0.2s,box-shadow 0.2s;}.video-card:hover{transform:translateY(-4px);box-shadow:0 4px 12px rgba(0,0,0,0.1);}.video-card h3 a{color:#212529;font-weight:600;}.video-card .one-line{color:#495057;margin:0.5rem 0;font-size:0.95rem;}.video-card .meta,.video-card .year,.video-card .date{font-size:0.85rem;color:#6c757d;}.video-card .summary{font-size:0.9rem;color:#495057;margin-top:0.5rem;}.video-card .rank{display:inline-block;background:#ffc107;color:#fff;padding:0.25rem 0.5rem;border-radius:4px;font-weight:bold;font-size:0.85rem;margin-right:0.5rem;}article .info p{margin:0.5rem 0;}article .info strong{color:#495057;}@media (max-width:767px){nav{padding:0.75rem 0.5rem;flex-wrap:nowrap;overflow-x:hidden;}nav a{font-size:0.85rem;padding:0.5rem 0.25rem;}.video-list{grid-template-columns:1fr;}h1{font-size:1.5rem;}h2{font-size:1.25rem;}}