*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";font-size:16px;line-height:1.6;color:#333;background-color:#fff;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.container{max-width:1200px;margin:0 auto;padding:0 1rem}header{background:#fff;border-bottom:1px solid #e0e0e0;position:sticky;top:0;z-index:100;box-shadow:0 2px 4px rgba(0,0,0,0.05)}nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;padding:0.8rem 1rem;max-width:1200px;margin:0 auto;gap:0.5rem}nav .logo{flex:0 0 auto;font-weight:bold;font-size:1.2rem;color:#d32f2f;margin-right:1rem;white-space:nowrap;text-decoration:none}nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;padding:0.5rem 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a{color:#222;text-decoration:none}.video-card h3 a:hover{color:#d32f2f}.video-card .one-line{color:#666;font-size:0.9rem;line-height:1.5;margin-bottom:0.5rem}.video-card .summary-excerpt{color:#777;font-size:0.85rem;line-height:1.5;margin-bottom:0.5rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-card .meta{color:#999;font-size:0.8rem;margin:0.5rem 0 0 0}@media (max-width:768px){.video-grid{grid-template-columns:1fr;gap:1rem}}.video-list{list-style:none;padding:0;margin:1.5rem 0}.video-item{background:#fafafa;border-left:3px solid #d32f2f;padding:1rem 1.2rem;margin-bottom:1rem;border-radius:4px;transition:background 0.2s ease}.video-item:hover{background:#f0f0f0}.video-item h3{font-size:1.05rem;margin:0 0 0.6rem 0}.video-item h3 a{color:#222;text-decoration:none}.video-item h3 a:hover{color:#d32f2f}.video-item .one-line{color:#666;font-size:0.9rem;margin-bottom:0.5rem}.video-item 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.meta{color:#999;font-size:0.85rem;margin-bottom:0.4rem}.video-item-full .tags{color:#777;font-size:0.8rem;margin:0}@media (max-width:768px){.video-item-full{flex-direction:column;gap:0.8rem}.video-item-full .rank{width:32px;height:32px;font-size:0.95rem}}.video-detail{max-width:900px;margin:0 auto}.video-detail h1{font-size:2rem;border-bottom:2px solid #e0e0e0;padding-bottom:1rem;margin-bottom:1.5rem}.meta-info{background:#f9f9f9;border-left:4px solid #d32f2f;padding:1.2rem 1.5rem;margin-bottom:2rem;border-radius:4px}.meta-info p{margin:0.5rem 0;line-height:1.8}.meta-info strong{color:#555;font-weight:600;display:inline-block;min-width:60px}.one-line-section,.summary-section,.review-section{margin-bottom:2.5rem}.one-line-section p{font-size:1.1rem;color:#d32f2f;font-weight:500;line-height:1.7;padding:1rem;background:#fff8f8;border-left:4px solid #d32f2f;border-radius:4px}.summary-section p{font-size:1rem;line-height:1.8;color:#444;text-align:justify}.review-section{background:linear-gradient(135deg,#f5f5f5 0%,#e8e8e8 100%);padding:1.5rem;border-radius:8px;border-left:4px solid #ff9800}.review-section p{font-size:0.95rem;line-height:1.8;color:#555;font-style:italic;margin:0}.related-section{border-top:2px solid #e0e0e0;padding-top:2rem}.related-list{list-style:none;padding:0;margin:1.5rem 0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.related-list li{background:#fafafa;border:1px solid #e8e8e8;border-radius:6px;padding:1rem;transition:all 0.2s ease}.related-list li:hover{background:#fff;box-shadow:0 3px 8px rgba(0,0,0,0.08);border-color:#d32f2f}.related-list h3{font-size:1rem;margin:0 0 0.5rem 0}.related-list h3 a{color:#333;text-decoration:none}.related-list h3 a:hover{color:#d32f2f}.related-list p{font-size:0.85rem;color:#666;line-height:1.5;margin:0}@media (max-width:768px){.related-list{grid-template-columns:1fr}}@media (max-width:768px){main{padding:1.5rem 1rem}h1{font-size:1.5rem}h2{font-size:1.2rem}.video-detail h1{font-size:1.6rem}}body.ui-style-0,body.ui-style-1{background-color:#121212;color:#e0e0e0}body.ui-style-0 header,body.ui-style-1 header{background:#1e1e1e;border-bottom-color:#333}body.ui-style-0 nav a,body.ui-style-1 nav a{color:#b0b0b0}body.ui-style-0 nav a:hover,body.ui-style-1 nav a:hover{color:#ff6f00;background-color:#2a2a2a}body.ui-style-0 .video-card,body.ui-style-1 .video-card{background:#1e1e1e;border-color:#333}body.ui-style-0 .video-card:hover,body.ui-style-1 .video-card:hover{border-color:#ff6f00}body.ui-style-5,body.ui-style-6,body.ui-style-7,body.ui-style-8,body.ui-style-9{background-color:#0a0a0a;color:#d0d0d0}body.ui-style-5 header,body.ui-style-6 header,body.ui-style-7 header,body.ui-style-8 header,body.ui-style-9 header{background:#141414;border-bottom-color:#2a2a2a}.back-to-top{position:fixed;bottom:2rem;right:2rem;width:48px;height:48px;background:#d32f2f;color:#fff;border:none;border-radius:50%;font-size:1.2rem;cursor:pointer;opacity:0;visibility:hidden;transition:all 0.3s ease;box-shadow:0 4px 12px rgba(0,0,0,0.15);display:flex;align-items:center;justify-content:center;z-index:999}.back-to-top.visible{opacity:1;visibility:visible}.back-to-top:hover{background:#b71c1c;transform:translateY(-3px);box-shadow:0 6px 16px rgba(0,0,0,0.2)}@media (max-width:768px){.back-to-top{bottom:1rem;right:1rem;width:40px;height:40px;font-size:1rem}}