:root{--primary-color:#0066cc;--secondary-color:#ffcc00;--bg-color:#1a2332;--text-color:#e0e6ed;--card-bg:#252d3d;--border-color:#3a4556;}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans SC",Helvetica,Arial,sans-serif,"Apple Color Emoji","Segoe UI Emoji";background:var(--bg-color);color:var(--text-color);line-height:1.6;font-size:16px;}*{box-sizing:border-box;}a{color:var(--primary-color);text-decoration:none;transition:color 0.2s;}a:hover{color:var(--secondary-color);text-decoration:underline;}nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;padding:16px 24px;background:rgba(37,45,61,0.95);border-bottom:2px solid var(--border-color);backdrop-filter:blur(10px);}nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:10px 8px;color:#b8c5d6;font-weight:500;font-size:15px;border-radius:6px;transition:all 0.3s;}nav a:first-child{font-weight:700;color:var(--secondary-color);font-size:18px;}nav a:hover{background:var(--border-color);color:#ffffff;text-decoration:none;}@media (max-width:768px){nav{padding:12px 8px;}nav a{padding:8px 4px;font-size:13px;}nav a:first-child{font-size:15px;}}.breadcrumb{padding:14px 24px;font-size:14px;color:#8b95a6;background:rgba(37,45,61,0.5);border-bottom:1px solid var(--border-color);}.breadcrumb a{color:var(--primary-color);margin-right:6px;}.breadcrumb span{margin:0 6px;color:#5a6678;}main{max-width:1400px;margin:0 auto;padding:32px 24px;}h1{font-size:32px;margin:0 0 24px 0;color:#ffffff;font-weight:700;line-height:1.3;}h2{font-size:24px;margin:40px 0 20px 0;color:#ffffff;font-weight:600;padding-bottom:12px;border-bottom:2px solid var(--border-color);}.intro-section{background:var(--card-bg);padding:32px;border-radius:12px;margin-bottom:40px;border:1px solid var(--border-color);line-height:1.8;}.intro-section p{margin:12px 0;font-size:16px;color:#c5d0de;}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:24px;margin:24px 0;}.video-card{background:var(--card-bg);border-radius:10px;overflow:hidden;border:1px solid var(--border-color);transition:all 0.3s;display:flex;flex-direction:column;}.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,102,204,0.25);border-color:var(--primary-color);}.video-card-content{padding:20px;flex-grow:1;display:flex;flex-direction:column;}.video-card h3{font-size:18px;margin:0 0 12px 0;color:#ffffff;font-weight:600;line-height:1.4;}.video-card h3 a{color:inherit;}.video-card h3 a:hover{color:var(--secondary-color);}.video-meta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:12px;font-size:13px;color:#8b95a6;}.video-meta span{padding:4px 10px;background:rgba(255,255,255,0.05);border-radius:4px;border:1px solid var(--border-color);}.video-desc{font-size:14px;line-height:1.7;color:#a8b5c7;margin-top:auto;}.video-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px;}.tag{display:inline-block;padding:4px 12px;background:rgba(0,102,204,0.15);color:var(--primary-color);border-radius:16px;font-size:12px;border:1px solid rgba(0,102,204,0.3);}.detail-header{background:var(--card-bg);padding:40px;border-radius:12px;margin-bottom:32px;border:1px solid var(--border-color);}.detail-header h1{margin-bottom:20px;}.detail-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin:24px 0;}.meta-item{padding:12px 16px;background:rgba(255,255,255,0.03);border-radius:8px;border:1px solid var(--border-color);}.meta-label{font-size:13px;color:#8b95a6;margin-bottom:4px;}.meta-value{font-size:15px;color:#ffffff;font-weight:500;}.detail-section{background:var(--card-bg);padding:32px;border-radius:12px;margin-bottom:24px;border:1px solid var(--border-color);}.detail-section h2{margin-top:0;border-bottom-color:var(--border-color);}.detail-section p{line-height:1.9;color:#c5d0de;font-size:16px;margin:16px 0;}.highlight-box{background:rgba(0,102,204,0.1);border-left:4px solid var(--primary-color);padding:20px 24px;margin:20px 0;border-radius:6px;}.related-videos{margin-top:48px;}.list-notice{background:rgba(255,204,0,0.15);border:1px solid rgba(255,204,0,0.4);border-radius:8px;padding:20px 24px;margin-bottom:32px;color:#ffcc00;}.list-notice p{margin:8px 0;}.list-notice a{color:#ffcc00;text-decoration:underline;font-weight:500;}.unavailable{text-align:center;padding:80px 24px;}.unavailable h1{color:#8b95a6;font-size:28px;}.unavailable p{color:#6a7585;font-size:16px;margin:20px 0;}.unavailable .back-links{margin-top:32px;}.unavailable .back-links a{display:inline-block;padding:12px 24px;background:var(--primary-color);color:#ffffff;border-radius:6px;margin:0 8px;font-weight:500;}.unavailable .back-links a:hover{background:var(--secondary-color);color:#1a2332;text-decoration:none;}footer{text-align:center;padding:40px 24px;color:#6a7585;border-top:1px solid var(--border-color);margin-top:60px;font-size:14px;}@media (max-width:768px){main{padding:20px 16px;}h1{font-size:24px;}h2{font-size:20px;}.video-grid{grid-template-columns:1fr;gap:16px;}.detail-header,.detail-section,.intro-section{padding:20px;}.detail-meta{grid-template-columns:1fr;}}