*{box-sizing:border-box}
body{margin:0;padding:0;font-family:'Microsoft YaHei','Segoe UI',Tahoma,sans-serif;line-height:1.6;background:#f9f9f9;color:#333}
a{color:#2563eb;text-decoration:none;transition:color 0.2s}
a:hover{color:#1d4ed8;text-decoration:underline}
header{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,0.08);position:sticky;top:0;z-index:100}
.logo{margin:0;padding:20px;text-align:center;font-size:28px;font-weight:700;color:#1e40af}
.logo a{color:inherit;text-decoration:none}
nav{border-top:1px solid #e5e7eb}
nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;background:#fff}
nav li{flex:1 1 0;min-width:0;text-align:center;border-right:1px solid #e5e7eb}
nav li:last-child{border-right:none}
nav a{display:block;padding:15px 8px;color:#374151;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
nav a:hover,nav a.active{background:#eff6ff;color:#1e40af;text-decoration:none}
main{max-width:1200px;margin:0 auto;padding:30px 20px}
section{margin-bottom:50px}
.hero h1{font-size:26px;line-height:1.4;color:#1f2937;text-align:center;margin:20px 0}
.intro{background:#fff;padding:25px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1);line-height:1.8;font-size:15px}
h2{font-size:22px;margin:0 0 20px;color:#1f2937;border-left:4px solid #2563eb;padding-left:12px}
.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px}
.video-card{background:#fff;padding:20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1);transition:transform 0.2s,box-shadow 0.2s}
.video-card:hover{transform:translateY(-4px);box-shadow:0 4px 12px rgba(0,0,0,0.15)}
.video-card h3{margin:0 0 10px;font-size:18px}
.video-card .meta{font-size:13px;color:#6b7280;margin:8px 0}
.video-card .genre{font-size:13px;color:#059669;margin:5px 0}
.video-card .summary{font-size:14px;color:#4b5563;line-height:1.5}
.ranking-list{background:#fff;padding:20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.ranking-item{display:flex;align-items:center;padding:15px;border-bottom:1px solid #e5e7eb;transition:background 0.2s}
.ranking-item:last-child{border-bottom:none}
.ranking-item:hover{background:#f9fafb}
.ranking-item .rank{font-size:24px;font-weight:700;color:#2563eb;width:50px;text-align:center}
.ranking-item .info{flex:1}
.ranking-item h3{margin:0 0 5px;font-size:17px}
.ranking-item p{margin:3px 0;font-size:13px;color:#6b7280}
.video-list{display:flex;flex-direction:column;gap:20px}
.video-item{background:#fff;padding:20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.video-item h3{margin:0 0 8px;font-size:18px}
.video-item .meta{font-size:13px;color:#6b7280;margin:5px 0}
.video-item p{font-size:14px;color:#4b5563;line-height:1.6}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.topic-card{background:#fff;padding:20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.topic-card .topic-tag{display:inline-block;background:#dbeafe;color:#1e40af;padding:4px 12px;border-radius:12px;font-size:12px;margin-bottom:10px}
.topic-card h3{margin:10px 0 8px;font-size:17px}
.topic-card .meta{font-size:13px;color:#6b7280;margin:5px 0}
.topic-card p{font-size:14px;color:#4b5563;line-height:1.5}
.latest-list{display:flex;flex-direction:column;gap:15px}
.latest-item{display:flex;gap:20px;background:#fff;padding:20px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.latest-item .date{font-size:20px;font-weight:700;color:#2563eb;min-width:60px}
.latest-item .content{flex:1}
.latest-item h3{margin:0 0 8px;font-size:17px}
.latest-item .meta{font-size:13px;color:#6b7280;margin:5px 0}
.latest-item p{font-size:14px;color:#4b5563;line-height:1.5}
.more-link{text-align:center;margin-top:25px;font-size:16px}
.more-link a{color:#2563eb;font-weight:500}
.page-desc{background:#eff6ff;padding:15px 20px;border-radius:6px;border-left:4px solid #2563eb;margin-bottom:25px;line-height:1.7}
.detail article{background:#fff;padding:30px;border-radius:8px;box-shadow:0 1px 3px rgba(0,0,0,0.1)}
.detail h1{font-size:28px;margin:0 0 20px;color:#1f2937}
.meta-info{background:#f9fafb;padding:20px;border-radius:6px;margin-bottom:25px}
.meta-info p{margin:8px 0;font-size:15px}
.meta-info strong{color:#1f2937;font-weight:600}
.highlight{background:#fef3c7;padding:20px;border-radius:6px;margin:25px 0;border-left:4px solid #f59e0b}
.highlight h2{font-size:18px;margin:0 0 12px;border:none;padding:0;color:#92400e}
.highlight p{font-size:16px;line-height:1.7;color:#78350f;margin:0}
.summary,.review{margin:25px 0}
.summary h2,.review h2{font-size:20px;margin-bottom:15px}
.summary p,.review p{font-size:15px;line-height:1.8;color:#374151}
.related{margin-top:40px;padding-top:30px;border-top:2px solid #e5e7eb}
.related h2{font-size:22px;margin-bottom:20px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:18px}
.related-card{background:#f9fafb;padding:18px;border-radius:6px;border:1px solid #e5e7eb;transition:all 0.2s}
.related-card:hover{background:#fff;box-shadow:0 2px 8px rgba(0,0,0,0.1)}
.related-card h3{margin:0 0 8px;font-size:16px}
.related-card .meta{font-size:12px;color:#6b7280;margin:5px 0}
.related-card p{font-size:13px;color:#4b5563;line-height:1.5;margin:8px 0 0}
footer{background:#1f2937;color:#d1d5db;text-align:center;padding:30px 20px;margin-top:60px}
footer p{margin:0;font-size:14px}
@media(max-width:768px){
.logo{font-size:22px;padding:15px}
nav a{padding:12px 5px;font-size:13px}
main{padding:20px 15px}
.hero h1{font-size:20px}
h2{font-size:19px}
.video-grid{grid-template-columns:1fr;gap:15px}
.topic-grid{grid-template-columns:1fr}
.related-grid{grid-template-columns:1fr}
.detail h1{font-size:24px}
.latest-item{flex-direction:column;gap:10px}
.latest-item .date{min-width:auto}
}