:root{--primary-color:#3498db;--secondary-color:#2c3e50;--accent-color:#e74c3c;--bg-light:#f8f9fa;--text-dark:#2c3e50;--border-color:#ddd}body{font-size:16px;background:var(--bg-light)}.container{max-width:1200px;margin:0 auto;padding:2rem 1rem}.hero{text-align:center;padding:3rem 1rem;background:linear-gradient(135deg,#667eea 0%,#764ba2 100%);color:white;border-radius:12px;margin-bottom:3rem}.hero h1{font-size:2rem;margin-bottom:1.5rem;line-height:1.4}.intro{max-width:800px;margin:0 auto;font-size:1.05rem;line-height:1.8}section{margin-bottom:3rem}section h2{font-size:1.8rem;margin-bottom:1.5rem;color:var(--secondary-color);padding-bottom:0.5rem;border-bottom:3px solid var(--primary-color)}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem}.video-card{background:white;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1);transition:transform 0.3s,box-shadow 0.3s}.video-card:hover{transform:translateY(-5px);box-shadow:0 4px 16px rgba(0,0,0,0.15)}.card-header{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:0.5rem}.video-card h3{font-size:1.2rem;margin-bottom:0.5rem;flex:1}.video-card a{color:var(--secondary-color);text-decoration:none;transition:color 0.3s}.video-card a:hover{color:var(--primary-color)}.year{background:var(--primary-color);color:white;padding:0.2rem 0.6rem;border-radius:4px;font-size:0.85rem;white-space:nowrap}.meta{color:#7f8c8d;font-size:0.9rem;margin-bottom:0.5rem}.one-line{color:#555;font-size:0.95rem;line-height:1.5}.summary{color:#666;font-size:0.9rem;line-height:1.6;margin-top:0.5rem}.tags{color:var(--primary-color);font-size:0.85rem;margin:0.5rem 0}.ranking-list{display:flex;flex-direction:column;gap:1rem}.ranking-item{display:flex;gap:1rem;background:white;padding:1rem;border-radius:8px;box-shadow:0 2px 6px rgba(0,0,0,0.08);align-items:center}.rank{font-size:2rem;font-weight:bold;color:var(--primary-color);min-width:50px;text-align:center}.item-info{flex:1}.item-info h4{font-size:1.1rem;margin-bottom:0.3rem}.item-info a{color:var(--text-dark);text-decoration:none;transition:color 0.3s}.item-info a:hover{color:var(--primary-color)}.section-link{margin-top:1.5rem;text-align:center}.section-link a{display:inline-block;margin:0 0.5rem;padding:0.6rem 1.5rem;background:var(--primary-color);color:white;text-decoration:none;border-radius:6px;transition:all 0.3s}.section-link a:hover{background:var(--secondary-color);transform:translateX(5px)}.page-intro{font-size:1.05rem;color:#555;margin-bottom:2rem;padding:1rem;background:white;border-radius:8px;border-left:4px solid var(--primary-color)}.list-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:1.5rem}.list-card{background:white;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.list-card h3{font-size:1.15rem;margin-bottom:0.8rem}.ranking-list-page{display:flex;flex-direction:column;gap:1.2rem}.rank-card{display:flex;gap:1.5rem;background:white;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.rank-number{font-size:2.5rem;font-weight:bold;color:var(--accent-color);min-width:60px;text-align:center;display:flex;align-items:center;justify-content:center}.rank-content{flex:1}.rank-content h3{font-size:1.3rem;margin-bottom:0.5rem}.review{color:#555;font-style:italic;line-height:1.6;margin-top:0.8rem}.topic-grid{display:flex;flex-direction:column;gap:2.5rem}.topic-section h2{font-size:1.5rem;margin-bottom:1rem}.topic-videos{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1rem}.topic-card{background:white;padding:1rem;border-radius:6px;box-shadow:0 2px 6px rgba(0,0,0,0.08)}.topic-card h4{font-size:1rem;margin-bottom:0.5rem}.latest-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:1.5rem}.latest-card{background:white;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.1);position:relative}.card-date{position:absolute;top:1rem;right:1rem;background:var(--accent-color);color:white;padding:0.3rem 0.8rem;border-radius:4px;font-weight:bold;font-size:0.9rem}.latest-card h3{font-size:1.2rem;margin-bottom:0.8rem;padding-right:3rem}.detail-page{max-width:900px}.video-detail{background:white;padding:2.5rem;border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,0.1)}.video-detail h1{font-size:2.2rem;margin-bottom:1.5rem;color:var(--secondary-color)}.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1rem;background:var(--bg-light);padding:1.5rem;border-radius:8px;margin-bottom:2rem}.info-item{font-size:0.95rem}.label{font-weight:bold;color:var(--secondary-color)}.detail-section{margin-bottom:2rem}.detail-section h2{font-size:1.5rem;margin-bottom:1rem;color:var(--secondary-color);border-bottom:2px solid var(--primary-color);padding-bottom:0.5rem}.highlight{font-size:1.1rem;color:var(--primary-color);font-weight:500;line-height:1.6;padding:1rem;background:#f0f8ff;border-left:4px solid var(--primary-color);border-radius:4px}.summary-text,.review-text{font-size:1rem;line-height:1.8;color:#444}.related-section{margin-top:3rem;padding-top:2rem;border-top:2px solid var(--border-color)}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.related-card{background:var(--bg-light);padding:1rem;border-radius:6px;transition:all 0.3s}.related-card:hover{background:white;box-shadow:0 2px 8px rgba(0,0,0,0.1);transform:translateY(-3px)}.related-card h4{font-size:0.95rem;margin-bottom:0.5rem}.related-card a{color:var(--text-dark);text-decoration:none}.related-card a:hover{color:var(--primary-color)}footer{background:var(--secondary-color);color:white;text-align:center;padding:2rem 1rem;margin-top:3rem}@media (max-width:768px){.container{padding:1rem 0.5rem}.hero{padding:2rem 1rem}.hero h1{font-size:1.5rem}.video-grid,.list-grid,.latest-grid{grid-template-columns:1fr}.topic-videos{grid-template-columns:1fr}.video-detail{padding:1.5rem}.info-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:1fr}}