*{box-sizing:border-box;}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;font-size:16px;line-height:1.6;color:#333;background:#fff;}.container{max-width:1200px;margin:0 auto;padding:2rem;}.site-nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;padding:1rem 2rem;background:#f8f9fa;border-bottom:1px solid #ddd;}.nav-logo{font-weight:bold;font-size:1.3rem;color:#000;}.nav-links{display:flex;flex-wrap:nowrap;list-style:none;margin:0;padding:0;gap:1.5rem;}.nav-links li{flex:1 1 0;min-width:0;text-align:center;}.nav-links a{text-decoration:none;color:#333;font-weight:500;transition:color 0.2s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;display:block;}.nav-links a:hover,.nav-links a.active{color:#007bff;}.breadcrumb{padding:1rem 2rem;font-size:0.9rem;color:#666;background:#f9f9f9;}.breadcrumb a{color:#007bff;text-decoration:none;}.breadcrumb a:hover{text-decoration:underline;}.hero{text-align:center;padding:3rem 1rem;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:#fff;border-radius:8px;margin-bottom:2rem;}.hero h1{font-size:2rem;margin:0 0 1rem 0;}.intro{font-size:1.1rem;max-width:800px;margin:0 auto;}.content-section{margin-bottom:3rem;}.content-section h2{font-size:1.8rem;margin-bottom:1.5rem;color:#222;border-left:4px solid #007bff;padding-left:1rem;}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;}.video-card{background:#f9f9f9;padding:1.5rem;border-radius:8px;box-shadow:0 2px 4px 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{font-size:1.3rem;margin:0 0 0.5rem 0;}.video-card h3 a{color:#222;text-decoration:none;}.video-card h3 a:hover{color:#007bff;}.video-card .meta{font-size:0.9rem;color:#666;margin:0.5rem 0;}.video-card .oneline{font-size:1rem;color:#444;margin:0.8rem 0;}.video-card .summary{font-size:0.95rem;color:#555;margin:0.8rem 0;}.more-link{text-align:center;margin-top:2rem;}.more-link a{color:#007bff;text-decoration:none;font-weight:500;font-size:1.1rem;}.more-link a:hover{text-decoration:underline;}.video-list{display:flex;flex-direction:column;gap:1.5rem;}.video-item{background:#f9f9f9;padding:1.5rem;border-radius:8px;border-left:4px solid #007bff;}.video-item h3{font-size:1.4rem;margin:0 0 0.5rem 0;}.video-item h3 a{color:#222;text-decoration:none;}.video-item h3 a:hover{color:#007bff;}.video-item .rank{display:inline-block;min-width:2rem;color:#007bff;font-weight:bold;}.video-item .meta,.video-item .tags{font-size:0.9rem;color:#666;margin:0.3rem 0;}.video-item .oneline{font-size:1rem;color:#444;margin:0.8rem 0 0 0;}.notice{background:#fff3cd;border:1px solid #ffc107;padding:1rem;border-radius:4px;margin-bottom:2rem;}.notice a{color:#007bff;text-decoration:none;font-weight:500;}.notice a:hover{text-decoration:underline;}.detail h1{font-size:2.2rem;margin-bottom:1rem;color:#222;}.detail-meta{background:#f0f0f0;padding:1rem;border-radius:8px;margin-bottom:2rem;}.detail-meta p{margin:0.3rem 0;font-size:1rem;}.detail-section{margin-bottom:2.5rem;}.detail-section h2{font-size:1.6rem;margin-bottom:1rem;color:#333;border-bottom:2px solid #007bff;padding-bottom:0.5rem;}.detail-section p{font-size:1.05rem;line-height:1.8;color:#444;}.highlight{background:#e7f3ff;padding:1rem;border-left:4px solid #007bff;font-size:1.1rem;font-weight:500;}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem;}.related-item{background:#f9f9f9;padding:1rem;border-radius:6px;}.related-item h3{font-size:1.1rem;margin:0 0 0.5rem 0;}.related-item h3 a{color:#222;text-decoration:none;}.related-item h3 a:hover{color:#007bff;}.related-item p{font-size:0.95rem;color:#555;margin:0;}@media (max-width:768px){.container{padding:1rem;}.site-nav{padding:0.8rem 1rem;flex-wrap:nowrap;}.nav-logo{font-size:1rem;}.nav-links{gap:0.5rem;flex-wrap:nowrap;}.nav-links li{flex:1 1 0;min-width:0;}.nav-links a{font-size:0.85rem;padding:0.3rem 0;}.breadcrumb{padding:0.8rem 1rem;font-size:0.85rem;}.hero{padding:2rem 1rem;}.hero h1{font-size:1.5rem;}.intro{font-size:1rem;}.content-section h2{font-size:1.5rem;}.video-grid{grid-template-columns:1fr;gap:1.5rem;}.related-grid{grid-template-columns:1fr;}.detail h1{font-size:1.8rem;}}