:root{--primary-bg:#0a0e27;--secondary-bg:#141b3d;--card-bg:#1a2449;--accent-blue:#4a9eff;--accent-red:#ff4a6e;--text-primary:#e0e0e0;--text-secondary:#a0a0a0;--border-color:#2a3459;}*{margin:0;padding:0;box-sizing:border-box;}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Roboto","Helvetica Neue",Arial,"Noto Sans",sans-serif;background:var(--primary-bg);color:var(--text-primary);line-height:1.6;}.container{max-width:1200px;margin:0 auto;padding:0 1rem;}nav{background:var(--secondary-bg);padding:1rem;display:flex;flex-wrap:nowrap;justify-content:space-between;overflow:hidden;box-shadow:0 2px 8px rgba(0,0,0,0.3);}nav a{flex:1 1 0;min-width:0;text-align:center;white-space:nowrap;text-overflow:ellipsis;overflow:hidden;color:#fff;font-weight:500;padding:0.5rem 0.25rem;transition:all 0.3s ease;border-radius:8px;}nav a:hover{color:var(--accent-blue);background:rgba(74,158,255,0.1);transform:translateY(-2px);}@media (min-width:768px){nav{justify-content:center;gap:2rem;}nav a{flex:0 0 auto;padding:0.5rem 1.5rem;}}.hero{background:linear-gradient(135deg,var(--secondary-bg) 0%,var(--primary-bg) 100%);padding:4rem 0;text-align:center;border-bottom:2px solid var(--border-color);}.hero h1{font-size:2.5rem;margin-bottom:1rem;color:#fff;text-shadow:0 2px 4px rgba(0,0,0,0.5);}.hero-subtitle{font-size:1.1rem;color:var(--text-secondary);max-width:800px;margin:0 auto;}@media (max-width:767px){.hero h1{font-size:1.8rem;}.hero-subtitle{font-size:1rem;}}.page-header{background:var(--secondary-bg);padding:3rem 0;text-align:center;border-bottom:2px solid var(--border-color);}.page-header h1{font-size:2rem;margin-bottom:0.5rem;color:#fff;}.page-header p{color:var(--text-secondary);}.breadcrumb{padding:1rem 0;font-size:0.9rem;color:var(--text-secondary);}.breadcrumb a{color:var(--accent-blue);transition:color 0.3s;}.breadcrumb a:hover{color:var(--accent-red);text-decoration:underline;}.section{padding:3rem 0;border-bottom:1px solid var(--border-color);}.section:last-child{border-bottom:none;}.section h2{font-size:1.8rem;margin-bottom:1.5rem;color:#fff;position:relative;padding-left:1rem;}.section h2::before{content:'';position:absolute;left:0;top:50%;transform:translateY(-50%);width:4px;height:1.5rem;background:linear-gradient(to bottom,var(--accent-blue),var(--accent-red));border-radius:2px;}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.5rem;}@media (max-width:767px){.video-grid{grid-template-columns:repeat(2,1fr);gap:1rem;}}@media (max-width:480px){.video-grid{grid-template-columns:1fr;}}.video-card{background:var(--card-bg);border-radius:12px;overflow:hidden;transition:all 0.3s ease;box-shadow:0 2px 8px rgba(0,0,0,0.2);}.video-card:hover{transform:translateY(-8px) scale(1.02);box-shadow:0 8px 20px rgba(74,158,255,0.3);}.video-card a{display:block;color:inherit;}.video-thumb{position:relative;padding-top:56.25%;background:var(--secondary-bg);overflow:hidden;}.video-thumb-placeholder{position:absolute;top:0;left:0;right:0;bottom:0;display:flex;align-items:center;justify-content:center;font-size:4rem;font-weight:bold;color:rgba(255,255,255,0.1);background:linear-gradient(135deg,var(--secondary-bg),var(--primary-bg));}.video-card h3{padding:1rem 1rem 0.5rem;font-size:1.1rem;color:#fff;line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}.video-meta{padding:0 1rem;font-size:0.85rem;color:var(--accent-blue);}.video-desc{padding:0.5rem 1rem 1rem;font-size:0.9rem;color:var(--text-secondary);line-height:1.5;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;}.category-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:1.5rem;}@media (max-width:767px){.category-grid{grid-template-columns:repeat(2,1fr);gap:1rem;}}.category-card{background:var(--card-bg);border-radius:12px;padding:2rem 1rem;text-align:center;transition:all 0.3s ease;border:2px solid var(--border-color);}.category-card:hover{border-color:var(--accent-blue);transform:translateY(-5px);box-shadow:0 8px 20px rgba(74,158,255,0.2);}.category-card h3{font-size:1.3rem;margin-bottom:0.5rem;color:#fff;}.category-card p{font-size:0.9rem;color:var(--text-secondary);}.detail-page{padding:2rem 0;}.detail-header{padding:2rem 0;border-bottom:2px solid var(--border-color);}.detail-header h1{font-size:2.2rem;margin-bottom:1rem;color:#fff;}.detail-meta{display:flex;flex-wrap:wrap;gap:1rem;font-size:0.95rem;color:var(--accent-blue);}.detail-meta span{padding:0.3rem 0.8rem;background:var(--secondary-bg);border-radius:20px;border:1px solid var(--border-color);}.detail-section{padding:2rem 0;border-bottom:1px solid var(--border-color);}.detail-section:last-child{border-bottom:none;}.detail-section h2{font-size:1.5rem;margin-bottom:1rem;color:#fff;}.detail-section p{line-height:1.8;color:var(--text-primary);}.detail-section .oneline{font-size:1.1rem;font-style:italic;color:var(--accent-blue);}.tags{display:flex;flex-wrap:wrap;gap:0.5rem;}.tag{display:inline-block;padding:0.4rem 0.8rem;background:var(--secondary-bg);border-radius:20px;font-size:0.9rem;color:var(--text-secondary);border:1px solid var(--border-color);transition:all 0.3s;}.tag:hover{background:var(--accent-blue);color:#fff;border-color:var(--accent-blue);}.error-page{text-align:center;padding:5rem 0;}.error-page h1{font-size:6rem;color:var(--accent-red);margin-bottom:1rem;}.error-page p{font-size:1.2rem;color:var(--text-secondary);margin-bottom:2rem;}.notice{padding:2rem;background:var(--secondary-bg);border-radius:8px;border-left:4px solid var(--accent-red);margin:2rem 0;}.btn-back{display:inline-block;padding:0.8rem 2rem;background:var(--accent-blue);color:#fff;border-radius:25px;font-weight:500;transition:all 0.3s;box-shadow:0 4px 12px rgba(74,158,255,0.3);}.btn-back:hover{background:var(--accent-red);transform:translateY(-2px);box-shadow:0 6px 16px rgba(255,74,110,0.4);}footer{background:var(--secondary-bg);padding:2rem 0;text-align:center;color:var(--text-secondary);border-top:2px solid var(--border-color);margin-top:3rem;}footer p{font-size:0.9rem;}