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span{font-size:.8rem;color:var(--color-text-secondary)}.latest-section{background:#fff}.latest-timeline{display:flex;flex-direction:column;gap:var(--spacing-xl);position:relative;padding-left:var(--spacing-xl)}.latest-timeline:before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:linear-gradient(to bottom,var(--color-primary),var(--color-secondary))}.timeline-item{position:relative;animation:slideInLeft .5s ease-out forwards;opacity:0}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}.timeline-marker{position:absolute;left:-29px;top:50%;transform:translateY(-50%);width:16px;height:16px;border-radius:50%;background:var(--color-primary);border:3px solid white;box-shadow:0 0 0 3px var(--color-primary);z-index:1}.cta-section{background:linear-gradient(135deg,#10b981,#059669);padding:var(--spacing-3xl) 0;margin-top:var(--spacing-3xl)}.cta-content{text-align:center;color:#fff;max-width:600px;margin:0 auto}.cta-title{font-size:2.5rem;font-weight:700;margin-bottom:var(--spacing-md)}.cta-description{font-size:1.2rem;margin-bottom:var(--spacing-xl);opacity:.95}.cta-section .btn{box-shadow:var(--shadow-xl);background:#fff;color:var(--color-primary);font-weight:700}.cta-section .btn:hover{transform:translateY(-4px);box-shadow:0 20px 40px #0003}@media (max-width: 1024px){.hero-title{font-size:2.5rem}.popular-grid{grid-template-columns:repeat(3,1fr)}.featured-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 768px){.hero-section{min-height:500px}.hero-title{font-size:2rem}.hero-subtitle{font-size:1.2rem}.featured-grid{grid-template-columns:1fr}.popular-grid{grid-template-columns:repeat(2,1fr)}.categories-grid{grid-template-columns:1fr}.cta-title{font-size:2rem}}@media (max-width: 640px){.hero-section{min-height:400px}.hero-title{font-size:1.75rem}.hero-subtitle{font-size:1rem}.hero-actions{flex-direction:column}.popular-grid{grid-template-columns:1fr}.latest-timeline{padding-left:var(--spacing-md)}.timeline-marker{left:-22px;width:12px;height:12px}}.video-player-container{position:relative;width:100%;background:#000;border-radius:var(--radius-lg);overflow:hidden;aspect-ratio:16 / 9}.video-player{width:100%;height:100%;object-fit:contain;display:block}.video-play-overlay{position:absolute;top:0;left:0;width:100%;height:100%;display:flex;align-items:center;justify-content:center;background:#0000004d;cursor:pointer;transition:opacity var(--transition-base) ease}.video-play-overlay:hover{background:#00000080}.video-play-button{width:80px;height:80px;display:flex;align-items:center;justify-content:center;background:#fff3;border-radius:50%;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);transition:all var(--transition-base) 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p{color:var(--color-text-secondary);line-height:1.8;font-size:.95rem;text-align:justify}.video-sidebar{display:flex;flex-direction:column;gap:var(--spacing-lg)}.sidebar-section{background:#fff;border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-sm)}.sidebar-title{font-size:1.1rem;font-weight:600;margin-bottom:var(--spacing-md);color:var(--color-text-primary);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--color-primary)}.related-videos{display:flex;flex-direction:column;gap:var(--spacing-md)}.related-video-item{display:flex;gap:var(--spacing-sm);padding:var(--spacing-sm);border-radius:var(--radius-md);transition:all var(--transition-base) ease}.related-video-item:hover{background:var(--color-bg-tertiary);transform:translate(4px)}.related-video-thumb{position:relative;width:120px;flex-shrink:0;border-radius:var(--radius-md);overflow:hidden;aspect-ratio:16 / 9}.related-video-thumb img{width:100%;height:100%;object-fit:cover}.related-video-info{flex:1;display:flex;flex-direction:column;justify-content:center;gap:var(--spacing-xs)}.related-video-info h4{font-size:.9rem;font-weight:600;color:var(--color-text-primary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;line-height:1.4}.related-video-meta{display:flex;flex-direction:column;gap:2px;font-size:.75rem;color:var(--color-text-light)}.category-tags{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-sm)}.category-tag{padding:var(--spacing-sm) var(--spacing-md);background:var(--color-bg-tertiary);color:var(--color-text-primary);border-radius:var(--radius-md);text-align:center;font-weight:500;font-size:.9rem;transition:all var(--transition-base) ease}.category-tag:hover{background:var(--color-primary);color:#fff;transform:translateY(-2px)}.more-videos-section{padding:var(--spacing-2xl) 0}.more-videos-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg)}@media (max-width: 1024px){.video-detail-content{grid-template-columns:1fr}.video-sidebar{flex-direction:row}.sidebar-section{flex:1}.more-videos-grid{grid-template-columns:repeat(3,1fr)}}@media (max-width: 768px){.video-sidebar{flex-direction:column}.video-stats{flex-wrap:wrap;gap:var(--spacing-md)}.more-videos-grid{grid-template-columns:repeat(2,1fr)}.video-info-title{font-size:1.5rem}}@media (max-width: 640px){.breadcrumb{font-size:.8rem}.video-info{padding:var(--spacing-md)}.category-tags,.more-videos-grid{grid-template-columns:1fr}}.category-page{background:var(--color-bg-secondary);min-height:100vh}.category-hero{position:relative;padding:var(--spacing-3xl) 0 var(--spacing-2xl);background:linear-gradient(135deg,#3b82f6,#8b5cf6);color:#fff;overflow:hidden}.category-hero-bg{position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at 30% 50%,rgba(255,255,255,.1),transparent 50%),radial-gradient(circle at 70% 80%,rgba(255,255,255,.1),transparent 50%);animation:float 15s ease-in-out infinite}.category-hero-title{position:relative;font-size:3rem;font-weight:800;margin-bottom:var(--spacing-sm);text-align:center;z-index:1}.category-hero-subtitle{position:relative;font-size:1.2rem;text-align:center;opacity:.9;z-index:1}.category-nav{background:#fff;border-radius:var(--radius-lg);padding:var(--spacing-lg);margin:var(--spacing-xl) 0;box-shadow:var(--shadow-md);display:flex;justify-content:space-between;align-items:center;gap:var(--spacing-lg);flex-wrap:wrap}.category-tabs{display:flex;gap:var(--spacing-sm);flex-wrap:wrap;flex:1}.category-tab{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-md);background:var(--color-bg-tertiary);color:var(--color-text-primary);font-weight:500;font-size:.9rem;transition:all var(--transition-base) ease;white-space:nowrap}.category-tab:hover{background:var(--color-primary);color:#fff;transform:translateY(-2px)}.category-tab.active{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-md)}.sort-controls{display:flex;gap:var(--spacing-sm);background:var(--color-bg-tertiary);padding:var(--spacing-xs);border-radius:var(--radius-md)}.sort-btn{padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--radius-sm);background:transparent;color:var(--color-text-secondary);font-weight:500;font-size:.9rem;transition:all var(--transition-base) ease}.sort-btn:hover{background:#fff;color:var(--color-text-primary)}.sort-btn.active{background:#fff;color:var(--color-primary);box-shadow:var(--shadow-sm)}.category-videos-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg);margin-bottom:var(--spacing-3xl)}.no-results p{font-size:1rem;margin-bottom:var(--spacing-md)}@media (max-width: 1024px){.category-videos-grid{grid-template-columns:repeat(3,1fr)}.category-hero-title{font-size:2.5rem}}@media (max-width: 768px){.category-videos-grid{grid-template-columns:repeat(2,1fr)}.category-hero-title{font-size:2rem}.category-nav{flex-direction:column;align-items:stretch}.sort-controls{justify-content:center}}@media (max-width: 640px){.category-videos-grid{grid-template-columns:1fr}.category-hero{padding:var(--spacing-2xl) 0 var(--spacing-lg)}.category-hero-title{font-size:1.75rem}.category-hero-subtitle{font-size:1rem}.category-tabs{justify-content:center}}.search-page{background:var(--color-bg-secondary);min-height:100vh}.search-hero{background:linear-gradient(135deg,#06b6d4,#0891b2);padding:var(--spacing-3xl) 0 var(--spacing-2xl);color:#fff}.search-hero-title{font-size:2.5rem;font-weight:800;margin-bottom:var(--spacing-sm);text-align:center}.search-query{font-size:1.2rem;text-align:center;opacity:.9}.search-results-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg);padding:var(--spacing-xl) 0 var(--spacing-3xl)}.no-results{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:400px;gap:var(--spacing-md);color:var(--color-text-secondary);padding:var(--spacing-3xl)}.no-results svg{opacity:.5}.no-results h3{font-size:1.5rem;color:var(--color-text-primary)}.no-results p{font-size:1rem;margin-bottom:var(--spacing-lg)}.search-suggestions{width:100%;max-width:500px;margin:var(--spacing-lg) 0;text-align:center}.search-suggestions h4{font-size:1rem;color:var(--color-text-primary);margin-bottom:var(--spacing-md)}.suggestion-tags{display:flex;gap:var(--spacing-sm);flex-wrap:wrap;justify-content:center;margin-bottom:var(--spacing-lg)}.suggestion-tag{padding:var(--spacing-sm) var(--spacing-md);background:#fff;color:var(--color-text-primary);border-radius:var(--radius-full);font-size:.9rem;font-weight:500;box-shadow:var(--shadow-sm);transition:all var(--transition-base) ease}.suggestion-tag:hover{background:var(--color-primary);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-md)}@media (max-width: 1024px){.search-results-grid{grid-template-columns:repeat(3,1fr)}.search-hero-title{font-size:2rem}}@media (max-width: 768px){.search-results-grid{grid-template-columns:repeat(2,1fr)}.search-hero-title{font-size:1.75rem}.search-query{font-size:1rem}}@media (max-width: 640px){.search-results-grid{grid-template-columns:1fr}.search-hero{padding:var(--spacing-2xl) 0 var(--spacing-lg)}.search-hero-title{font-size:1.5rem}}.info-page{background:var(--color-bg-secondary);min-height:100vh}.info-hero{background:linear-gradient(135deg,#6366f1,#8b5cf6);padding:var(--spacing-3xl) 0 var(--spacing-2xl);color:#fff;text-align:center}.service-hero{background:linear-gradient(135deg,#10b981,#059669)}.copyright-hero{background:linear-gradient(135deg,#f59e0b,#d97706)}.info-hero-title{font-size:3rem;font-weight:800;margin-bottom:var(--spacing-sm)}.info-hero-subtitle{font-size:1.3rem;opacity:.95}.info-content{padding:var(--spacing-3xl) 0}.info-section{background:#fff;border-radius:var(--radius-xl);padding:var(--spacing-2xl);margin-bottom:var(--spacing-xl);box-shadow:var(--shadow-sm)}.info-section-title{font-size:2rem;font-weight:700;margin-bottom:var(--spacing-xl);color:var(--color-text-primary);position:relative;padding-bottom:var(--spacing-md)}.info-section-title:after{content:"";position:absolute;bottom:0;left:0;width:60px;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-full)}.info-text{color:var(--color-text-secondary);line-height:1.8}.info-text p{margin-bottom:var(--spacing-md);text-align:justify}.info-text h3{font-size:1.3rem;color:var(--color-text-primary);margin:var(--spacing-xl) 0 var(--spacing-md);font-weight:600}.info-text ul{margin-left:var(--spacing-xl);margin-bottom:var(--spacing-md)}.info-text li{margin-bottom:var(--spacing-xs);line-height:1.8}.update-info{margin-top:var(--spacing-xl);padding-top:var(--spacing-md);border-top:1px solid var(--color-border);font-size:.9rem;color:var(--color-text-light)}.timeline{position:relative;padding-left:var(--spacing-2xl)}.timeline:before{content:"";position:absolute;left:0;top:0;bottom:0;width:3px;background:linear-gradient(to bottom,var(--color-primary),var(--color-secondary));border-radius:var(--radius-full)}.timeline-item{position:relative;margin-bottom:var(--spacing-xl);padding-left:var(--spacing-lg)}.timeline-item:before{content:"";position:absolute;left:-27px;top:8px;width:20px;height:20px;border-radius:50%;background:#fff;border:4px solid var(--color-primary);box-shadow:0 0 0 4px #fff}.timeline-year{font-size:.9rem;font-weight:700;color:var(--color-primary);margin-bottom:var(--spacing-xs)}.timeline-content h3{font-size:1.2rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-xs)}.timeline-content p{color:var(--color-text-secondary);line-height:1.6}.team-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:var(--spacing-lg)}.team-member{text-align:center;padding:var(--spacing-lg);border-radius:var(--radius-lg);background:var(--color-bg-secondary);transition:all var(--transition-base) ease}.team-member:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}.member-avatar{font-size:3rem;margin-bottom:var(--spacing-md)}.team-member h3{font-size:1.1rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-sm)}.team-member p{font-size:.9rem;color:var(--color-text-secondary);line-height:1.6}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}.contact-item{padding:var(--spacing-xl);border-radius:var(--radius-lg);background:var(--color-bg-secondary);text-align:center;transition:all var(--transition-base) ease}.contact-item:hover{transform:translateY(-4px);box-shadow:var(--shadow-md)}.contact-icon{display:flex;align-items:center;justify-content:center;width:64px;height:64px;margin:0 auto var(--spacing-md);border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff}.contact-item h3{font-size:1.1rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-xs)}.contact-item p{font-size:1rem;color:var(--color-text-secondary)}.help-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--spacing-lg)}.help-card{padding:var(--spacing-xl);border-radius:var(--radius-lg);background:var(--color-bg-secondary);border:2px solid transparent;transition:all var(--transition-base) ease}.help-card:hover{border-color:var(--color-primary);transform:translateY(-4px);box-shadow:var(--shadow-md)}.help-icon{font-size:2.5rem;margin-bottom:var(--spacing-md)}.help-card h3{font-size:1.2rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-sm)}.help-card p{color:var(--color-text-secondary);line-height:1.6}.guide-content{display:flex;flex-direction:column;gap:var(--spacing-xl)}.guide-step{display:flex;gap:var(--spacing-lg);align-items:flex-start}.step-number{flex-shrink:0;width:48px;height:48px;display:flex;align-items:center;justify-content:center;border-radius:50%;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;font-size:1.3rem;font-weight:700}.step-content h3{font-size:1.2rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-xs)}.step-content p{color:var(--color-text-secondary);line-height:1.6}.faq-list{display:flex;flex-direction:column;gap:var(--spacing-lg)}.faq-item{padding:var(--spacing-lg);border-radius:var(--radius-lg);background:var(--color-bg-secondary);border-left:4px solid var(--color-primary)}.faq-item h3{font-size:1.1rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-sm)}.faq-item p{color:var(--color-text-secondary);line-height:1.6}.contact-support{display:flex;flex-direction:column;gap:var(--spacing-xl)}.support-methods{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--spacing-lg)}.support-method{padding:var(--spacing-xl);border-radius:var(--radius-lg);background:var(--color-bg-secondary);text-align:center;display:flex;flex-direction:column;gap:var(--spacing-sm);align-items:center}.method-icon{font-size:3rem;margin-bottom:var(--spacing-sm)}.support-method h3{font-size:1.1rem;font-weight:600;color:var(--color-text-primary)}.support-method p{color:var(--color-text-secondary);font-size:1rem}.response-time{font-size:.85rem;color:var(--color-text-light)}.support-note{padding:var(--spacing-xl);border-radius:var(--radius-lg);background:var(--color-bg-secondary);border:2px dashed var(--color-border)}.support-note h4{font-size:1.1rem;font-weight:600;color:var(--color-text-primary);margin-bottom:var(--spacing-md)}.support-note ul{list-style:none;padding:0}.support-note li{padding-left:var(--spacing-lg);position:relative;color:var(--color-text-secondary);line-height:1.8;margin-bottom:var(--spacing-xs)}.support-note li:before{content:"•";position:absolute;left:0;color:var(--color-primary);font-weight:700;font-size:1.2rem}@media (max-width: 1024px){.team-grid{grid-template-columns:repeat(2,1fr)}.help-grid,.contact-grid,.support-methods{grid-template-columns:1fr}}@media (max-width: 768px){.info-hero-title{font-size:2.5rem}.info-section{padding:var(--spacing-xl)}.info-section-title{font-size:1.75rem}.team-grid{grid-template-columns:1fr}.timeline{padding-left:var(--spacing-lg)}.timeline-item{padding-left:var(--spacing-md)}}@media (max-width: 640px){.info-hero{padding:var(--spacing-2xl) 0 var(--spacing-lg)}.info-hero-title{font-size:2rem}.info-hero-subtitle{font-size:1.1rem}.info-section{padding:var(--spacing-md)}.guide-step{flex-direction:column}.step-number{width:40px;height:40px;font-size:1.1rem}}*{margin:0;padding:0;box-sizing:border-box}:root{--color-primary: #2563eb;--color-primary-dark: #1e40af;--color-secondary: #10b981;--color-accent: #f59e0b;--color-error: #ef4444;--color-success: #10b981;--color-warning: #f59e0b;--color-text-primary: #1f2937;--color-text-secondary: #6b7280;--color-text-light: #9ca3af;--color-bg-primary: #ffffff;--color-bg-secondary: #f9fafb;--color-bg-tertiary: #f3f4f6;--color-bg-dark: #111827;--color-border: #e5e7eb;--color-border-light: #f3f4f6;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-2xl: 48px;--spacing-3xl: 64px;--transition-fast: .15s;--transition-base: .2s;--transition-slow: .3s}body{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";color:var(--color-text-primary);background-color:var(--color-bg-secondary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;width:100%;margin:0 auto}a{text-decoration:none;color:inherit;transition:color var(--transition-base) ease}a:hover{color:var(--color-primary)}button{font-family:inherit;cursor:pointer;border:none;background:none;transition:all var(--transition-base) ease}img{max-width:100%;height:auto;display:block}.container{width:100%;max-width:1280px;margin:0 auto;padding:0 var(--spacing-md)}.container-wide{width:100%;max-width:1536px;margin:0 auto;padding:0 var(--spacing-md)}.section{padding:var(--spacing-3xl) 0}.section-title{font-size:2rem;font-weight:700;margin-bottom:var(--spacing-xl);color:var(--color-text-primary);position:relative;padding-bottom:var(--spacing-md)}.section-title:after{content:"";position:absolute;bottom:0;left:0;width:60px;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:var(--radius-full)}h1,h2,h3,h4,h5,h6{line-height:1.2;font-weight:600}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.5rem}p{line-height:1.8}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-md);font-weight:500;font-size:.95rem;transition:all var(--transition-base) ease;cursor:pointer;white-space:nowrap}.btn-primary{background:var(--color-primary);color:#fff}.btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--color-bg-tertiary);color:var(--color-text-primary)}.btn-secondary:hover{background:var(--color-border)}.card{background:var(--color-bg-primary);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition-base) ease;box-shadow:var(--shadow-sm)}.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}.badge{display:inline-block;padding:var(--spacing-xs) var(--spacing-sm);border-radius:var(--radius-sm);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.5px}.badge-primary{background:var(--color-primary);color:#fff}.badge-secondary{background:var(--color-secondary);color:#fff}.badge-accent{background:var(--color-accent);color:#fff}@media (max-width: 1024px){.section-title{font-size:1.75rem}h1{font-size:2rem}h2{font-size:1.75rem}}@media (max-width: 768px){.section{padding:var(--spacing-xl) 0}.section-title{font-size:1.5rem;margin-bottom:var(--spacing-lg)}h1{font-size:1.75rem}h2{font-size:1.5rem}h3{font-size:1.25rem}}@media (max-width: 640px){.container,.container-wide{padding:0 var(--spacing-sm)}}.loading{display:flex;align-items:center;justify-content:center;min-height:400px}.spinner{width:48px;height:48px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .5s ease-in}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.gradient-text{background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hover-scale{transition:transform var(--transition-base) ease}.hover-scale:hover{transform:scale(1.05)}