:root{--primary-bg:#1a2332;--secondary-bg:#283647;--text-primary:#fff;--text-secondary:#b8c5d6;--accent-blue:#3b82f6;--accent-yellow:#fbbf24;--border-color:#374357;--hover-bg:#334155}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,'Segoe UI','Microsoft YaHei',sans-serif;background-color:var(--primary-bg);color:var(--text-primary);line-height:1.6;font-size:16px}a{color:var(--accent-blue);text-decoration:none;transition:color .2s}a:hover{color:var(--accent-yellow)}header nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center}header nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}ul{list-style:none}header{background-color:var(--secondary-bg);border-bottom:2px solid var(--accent-blue);padding:1rem 0;position:sticky;top:0;z-index:100}.header-content{max-width:1400px;margin:0 auto;padding:0 1rem}.logo{font-size:1.5rem;font-weight:700;color:var(--accent-yellow);margin-bottom:.5rem;display:block}nav{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;gap:.5rem}nav a{flex:1 1 0;min-width:0;text-align:center;padding:.5rem;border-radius:8px;background-color:var(--primary-bg);transition:all .2s;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.9rem}nav a:hover{background-color:var(--hover-bg);transform:translateY(-2px)}nav a.active{background-color:var(--accent-blue);color:var(--text-primary)}.breadcrumb{max-width:1400px;margin:1rem auto;padding:0 1rem;font-size:.9rem;color:var(--text-secondary)}.breadcrumb a{color:var(--text-secondary);margin:0 .5rem}.breadcrumb a:hover{color:var(--accent-blue)}.breadcrumb span{margin:0 .3rem}main{max-width:1400px;margin:2rem auto;padding:0 1rem;min-height:60vh}h1{font-size:2rem;margin-bottom:1rem;color:var(--accent-yellow);line-height:1.2}h2{font-size:1.5rem;margin:2rem 0 1rem;color:var(--text-primary);border-left:4px solid var(--accent-blue);padding-left:1rem;line-height:1.2}.intro-section{background-color:var(--secondary-bg);padding:1.5rem;border-radius:12px;margin-bottom:2rem;border:1px solid var(--border-color)}.intro-section p{color:var(--text-secondary);line-height:1.8;margin-bottom:1rem}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1rem;margin-bottom:2rem}.video-card{background-color:var(--secondary-bg);border:1px solid var(--border-color);border-radius:12px;overflow:hidden;transition:all .3s;display:flex;flex-direction:column}.video-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(59,130,246,.3);border-color:var(--accent-blue)}.video-card-title{font-size:1rem;font-weight:700;padding:1rem 1rem .5rem;color:var(--text-primary);line-height:1.3}.video-card-meta{padding:0 1rem;font-size:.85rem;color:var(--text-secondary);display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:.5rem}.video-card-meta span{background-color:var(--primary-bg);padding:.2rem .5rem;border-radius:4px}.video-card-desc{padding:0 1rem 1rem;font-size:.9rem;color:var(--text-secondary);line-height:1.5;flex-grow:1}.video-card-tags{padding:.5rem 1rem 1rem;display:flex;flex-wrap:wrap;gap:.3rem}.tag{background-color:var(--accent-blue);color:var(--text-primary);padding:.2rem .6rem;border-radius:12px;font-size:.8rem}.tag.highlight{background-color:var(--accent-yellow);color:var(--primary-bg)}.detail-container{background-color:var(--secondary-bg);border-radius:12px;padding:2rem;border:1px solid var(--border-color)}.detail-title{font-size:2.5rem;color:var(--accent-yellow);margin-bottom:1.5rem;line-height:1.2}.detail-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1rem;margin-bottom:2rem;padding:1rem;background-color:var(--primary-bg);border-radius:8px}.meta-item{display:flex;align-items:center;gap:.5rem;font-size:.95rem}.meta-label{color:var(--text-secondary);font-weight:700}.meta-value{color:var(--text-primary)}.detail-section{margin-bottom:2rem}.detail-section h3{font-size:1.3rem;color:var(--accent-blue);margin-bottom:1rem;border-bottom:2px solid var(--border-color);padding-bottom:.5rem}.detail-section p{color:var(--text-secondary);line-height:1.8;margin-bottom:1rem}.related-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1rem}.list-notice{background-color:var(--accent-blue);color:var(--text-primary);padding:1rem 1.5rem;border-radius:8px;margin-bottom:2rem;border-left:4px solid var(--accent-yellow)}.list-notice p{margin:.5rem 0}.list-notice a{color:var(--accent-yellow);font-weight:700;text-decoration:underline}footer{background-color:var(--secondary-bg);border-top:2px solid var(--accent-blue);padding:2rem 0;margin-top:4rem;text-align:center}.footer-content{max-width:1400px;margin:0 auto;padding:0 1rem;color:var(--text-secondary);font-size:.9rem}.btn{display:inline-block;padding:.75rem 1.5rem;background-color:var(--accent-blue);color:var(--text-primary);border-radius:8px;transition:all .2s;border:none;cursor:pointer;font-size:1rem}.btn:hover{background-color:var(--accent-yellow);color:var(--primary-bg);transform:translateY(-2px)}@media (max-width:768px){nav{gap:.25rem}nav a{padding:.4rem .2rem;font-size:.8rem}.video-grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:.75rem}h1{font-size:1.5rem}h2{font-size:1.2rem}.detail-title{font-size:1.8rem}.detail-container{padding:1rem}.related-grid{grid-template-columns:repeat(auto-fill,minmax(140px,1fr))}}@media (max-width:480px){.video-grid,.related-grid{grid-template-columns:1fr}}