*{box-sizing:border-box;}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif;font-size:16px;line-height:1.6;color:#333;background:#f5f5f5;}.container{max-width:1200px;margin:0 auto;padding:20px;}nav{background:#fff;box-shadow:0 2px 4px rgba(0,0,0,0.1);position:sticky;top:0;z-index:100;}nav ul{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;list-style:none;margin:0;padding:0;max-width:1200px;margin:0 auto;}nav li{flex:1 1 0;min-width:0;text-align:center;}nav a{display:block;padding:15px 10px;text-decoration:none;color:#333;font-weight:500;transition:all 0.3s ease;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}nav a:hover{background:#f0f0f0;color:#1976d2;}nav a.logo{font-weight:bold;color:#1976d2;}.breadcrumb{padding:15px 0;font-size:14px;color:#666;border-bottom:1px solid #e0e0e0;margin-bottom:20px;}.breadcrumb a{color:#1976d2;text-decoration:none;}.breadcrumb a:hover{text-decoration:underline;}h1{font-size:32px;font-weight:700;margin:20px 0;color:#222;line-height:1.3;}h2{font-size:24px;font-weight:600;margin:30px 0 15px;color:#333;line-height:1.4;}h3{font-size:18px;font-weight:600;margin:15px 0 10px;color:#333;line-height:1.5;}a{color:#1976d2;text-decoration:none;transition:color 0.3s ease;}a:hover{color:#1565c0;text-decoration:underline;}p{margin:15px 0;line-height:1.8;}.hero{background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;padding:60px 20px;text-align:center;margin-bottom:40px;}.hero h1{color:#fff;font-size:36px;margin-bottom:20px;}.hero .intro{font-size:18px;max-width:800px;margin:0 auto;opacity:0.95;line-height:1.8;}.site-intro{background:#fff;padding:40px 20px;margin-bottom:40px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.05);}section{background:#fff;padding:40px 20px;margin-bottom:40px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.05);}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:25px;margin-top:25px;}.video-card{background:#fafafa;border:1px solid #e0e0e0;border-radius:8px;padding:20px;transition:all 0.3s ease;}.video-card:hover{box-shadow:0 4px 12px rgba(0,0,0,0.1);transform:translateY(-2px);}.video-card h3{margin-top:0;font-size:18px;font-weight:600;}.video-card h3 a{color:#333;text-decoration:none;}.video-card h3 a:hover{color:#1976d2;}.video-card .one-line{color:#666;font-size:14px;margin:10px 0;line-height:1.6;}.video-card .summary-short{color:#777;font-size:13px;margin:10px 0;line-height:1.7;}.video-card .meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:15px;font-size:12px;}.video-card .meta span{background:#e3f2fd;color:#1976d2;padding:4px 10px;border-radius:4px;}article{background:#fff;padding:40px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.05);}.meta-info{background:#f9f9f9;padding:20px;border-radius:6px;margin:20px 0;}.meta-info p{margin:10px 0;line-height:1.8;}.one-line-section{background:#e3f2fd;padding:20px;border-radius:6px;margin:25px 0;}.one-line-section p{font-size:18px;font-weight:500;color:#1565c0;margin:0;}.summary-section,.review-section{margin:30px 0;}.summary-section p,.review-section p{line-height:2;text-align:justify;}.related-section{margin-top:50px;padding-top:30px;border-top:2px solid #e0e0e0;}.notice{background:#fff3cd;border:1px solid #ffc107;border-radius:6px;padding:20px;margin:25px 0;}.notice strong{color:#856404;}.notice ul{margin:15px 0 5px;padding-left:25px;}.notice li{margin:8px 0;}.page-desc{font-size:16px;color:#555;margin:20px 0 30px;line-height:1.8;}footer{background:#333;color:#fff;text-align:center;padding:30px 20px;margin-top:60px;}footer p{margin:0;opacity:0.9;}@media (max-width:768px){nav ul{display:flex;flex-wrap:nowrap;justify-content:space-between;overflow-x:visible;}nav li{flex:1 1 0;min-width:0;}nav a{padding:12px 5px;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}.hero h1{font-size:28px;}.hero .intro{font-size:16px;}h1{font-size:26px;}h2{font-size:20px;}.video-grid{grid-template-columns:1fr;gap:20px;}article{padding:25px 20px;}.container{padding:15px;}}@media (max-width:480px){nav a{padding:10px 3px;font-size:12px;}.hero{padding:40px 15px;}.hero h1{font-size:24px;}.hero .intro{font-size:14px;}}