:root{--color-primary: #FF6B6B;--color-secondary: #4ECDC4;--color-accent: #FFE66D;--color-success: #51CF66;--color-info: #339AF0;--color-warning: #FFB84D;--color-sky-blue: #87CEEB;--color-sunset-orange: #FF7E5F;--color-sunset-pink: #FEB47B;--color-cloud-white: #F8F9FA;--color-school-navy: #2C3E50;--color-text-primary: #2C3E50;--color-text-secondary: #5A6C7D;--color-text-light: #95A5A6;--color-bg-primary: #FFFFFF;--color-bg-secondary: #F8F9FA;--color-bg-tertiary: #E9ECEF;--color-border: #DEE2E6;--color-shadow: rgba(0, 0, 0, .1);--font-primary: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", sans-serif;--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--spacing-2xl: 3rem;--spacing-3xl: 4rem;--border-radius-sm: 4px;--border-radius-md: 8px;--border-radius-lg: 12px;--border-radius-xl: 16px;--transition-fast: .15s ease;--transition-normal: .3s ease;--transition-slow: .5s ease}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-primary);font-size:16px;line-height:1.6;color:var(--color-text-primary);background-color:var(--color-bg-primary);overflow-x:hidden}.app{min-height:100vh;display:flex;flex-direction:column}.main-content{flex:1;padding-top:80px}h1,h2,h3,h4,h5,h6{line-height:1.2;font-weight:600;margin-bottom:var(--spacing-md)}h1{font-size:2.5rem}h2{font-size:2rem}h3{font-size:1.75rem}h4{font-size:1.5rem}h5{font-size:1.25rem}h6{font-size:1rem}p{margin-bottom:var(--spacing-md)}a{color:inherit;text-decoration:none;transition:all var(--transition-fast)}img{max-width:100%;height:auto;display:block}button{font-family:inherit;cursor:pointer;border:none;background:none;transition:all var(--transition-fast)}.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:linear-gradient(135deg,var(--color-sunset-orange) 0%,var(--color-sunset-pink) 100%);box-shadow:0 2px 20px var(--color-shadow);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.header-container{max-width:1400px;margin:0 auto;padding:var(--spacing-lg) var(--spacing-xl);display:flex;justify-content:space-between;align-items:center}.logo{display:flex;align-items:center;gap:var(--spacing-sm);font-size:1.5rem;font-weight:700;color:#fff;text-shadow:2px 2px 4px rgba(0,0,0,.2)}.logo-icon{font-size:2rem}.nav{display:flex;gap:var(--spacing-xl);align-items:center}.nav-link{color:#fff;font-weight:500;padding:var(--spacing-sm) var(--spacing-md);border-radius:var(--border-radius-md);transition:all var(--transition-fast)}.nav-link:hover{background:#fff3;transform:translateY(-2px)}.nav-dropdown{position:relative}.dropdown-content{display:none;position:absolute;top:100%;left:0;background:#fff;border-radius:var(--border-radius-md);box-shadow:0 4px 20px var(--color-shadow);padding:var(--spacing-sm);min-width:150px;margin-top:var(--spacing-sm)}.nav-dropdown:hover .dropdown-content{display:block}.dropdown-content a{display:block;padding:var(--spacing-sm) var(--spacing-md);color:var(--color-text-primary);border-radius:var(--border-radius-sm);transition:all var(--transition-fast)}.dropdown-content a:hover{background:var(--color-bg-secondary);transform:translate(4px)}.menu-toggle{display:none;flex-direction:column;gap:4px;padding:var(--spacing-sm)}.menu-icon{width:24px;height:2px;background:#fff;transition:all var(--transition-fast)}.footer{background:linear-gradient(135deg,var(--color-school-navy) 0%,#34495e 100%);color:#fff;padding:var(--spacing-3xl) 0 var(--spacing-xl);margin-top:var(--spacing-3xl)}.footer-container{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-xl)}.footer-section h3{font-size:1.25rem;margin-bottom:var(--spacing-lg);color:var(--color-accent)}.footer-section ul{list-style:none}.footer-section li{margin-bottom:var(--spacing-sm)}.footer-section a{color:#fffc;transition:all var(--transition-fast)}.footer-section a:hover{color:#fff;padding-left:var(--spacing-sm)}.footer-contact p{color:#fffc;margin-bottom:var(--spacing-sm)}.footer-bottom{margin-top:var(--spacing-xl);padding-top:var(--spacing-xl);border-top:1px solid rgba(255,255,255,.1);text-align:center}.footer-bottom p{color:#fff9;margin-bottom:var(--spacing-sm)}.homepage{width:100%}.hero-section{position:relative;background:linear-gradient(135deg,var(--color-sky-blue) 0%,var(--color-sunset-pink) 100%);padding:var(--spacing-3xl) var(--spacing-xl);min-height:500px;display:flex;align-items:center;justify-content:center;overflow:hidden}.hero-content{max-width:800px;text-align:center;z-index:2;position:relative}.hero-title{font-size:3.5rem;color:#fff;text-shadow:3px 3px 6px rgba(0,0,0,.3);margin-bottom:var(--spacing-lg);animation:fadeInUp .8s ease}.hero-subtitle{font-size:1.5rem;color:#fff;margin-bottom:var(--spacing-lg);animation:fadeInUp 1s ease}.hero-description{font-size:1.1rem;color:#fffffff2;line-height:1.8;margin-bottom:var(--spacing-xl);animation:fadeInUp 1.2s ease}.hero-btn{display:inline-block;padding:var(--spacing-md) var(--spacing-2xl);background:#fff;color:var(--color-primary);border-radius:50px;font-weight:600;font-size:1.1rem;box-shadow:0 4px 20px #0003;transition:all var(--transition-normal);animation:fadeInUp 1.4s ease}.hero-btn:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 6px 30px #0000004d}.hero-decoration{position:absolute;inset:0;overflow:hidden;z-index:1}.cloud{position:absolute;background:#ffffff4d;border-radius:100px;animation:float 20s infinite ease-in-out}.cloud-1{width:200px;height:60px;top:20%;left:10%;animation-delay:0s}.cloud-2{width:300px;height:80px;top:60%;right:15%;animation-delay:5s}.cloud-3{width:150px;height:50px;bottom:20%;left:30%;animation-delay:10s}@keyframes float{0%,to{transform:translateY(0) translate(0)}25%{transform:translateY(-20px) translate(20px)}50%{transform:translateY(0) translate(40px)}75%{transform:translateY(-20px) translate(20px)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.section-header{max-width:1400px;margin:0 auto var(--spacing-xl);padding:0 var(--spacing-xl);display:flex;justify-content:space-between;align-items:center}.section-title{font-size:2rem;color:var(--color-text-primary);position:relative;padding-bottom:var(--spacing-sm)}.section-title:after{content:"";position:absolute;left:0;bottom:0;width:60px;height:4px;background:linear-gradient(90deg,var(--color-primary),var(--color-secondary));border-radius:2px}.section-subtitle{color:var(--color-text-secondary);font-size:1rem}.section-link{color:var(--color-primary);font-weight:500;transition:all var(--transition-fast)}.section-link:hover{transform:translate(4px)}.featured-section{padding:var(--spacing-3xl) 0;background:var(--color-bg-secondary)}.featured-carousel{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:var(--spacing-xl)}.featured-card{position:relative;border-radius:var(--border-radius-xl);overflow:hidden;box-shadow:0 4px 20px var(--color-shadow);transition:all var(--transition-normal)}.featured-card:hover{transform:translateY(-8px);box-shadow:0 8px 30px var(--color-shadow)}.featured-image{position:relative;height:400px;overflow:hidden}.featured-image img{width:100%;height:100%;object-fit:cover;transition:all var(--transition-slow)}.featured-card:hover .featured-image img{transform:scale(1.1)}.featured-gradient{position:absolute;bottom:0;left:0;right:0;height:60%;background:linear-gradient(to top,rgba(0,0,0,.8),transparent)}.featured-info{position:absolute;bottom:0;left:0;right:0;padding:var(--spacing-xl);color:#fff;z-index:2}.featured-category{display:inline-block;padding:var(--spacing-xs) var(--spacing-md);background:var(--color-primary);border-radius:20px;font-size:.875rem;margin-bottom:var(--spacing-sm)}.featured-info h3{font-size:1.5rem;margin-bottom:var(--spacing-sm)}.featured-info p{color:#ffffffe6;margin-bottom:var(--spacing-sm)}.featured-meta{display:flex;gap:var(--spacing-md);font-size:.875rem}.recent-section,.popular-section,.category-section{padding:var(--spacing-3xl) 0}.video-grid-masonry{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--spacing-xl)}.video-grid-compact{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:var(--spacing-lg)}.video-grid-horizontal{max-width:1400px;margin:0 auto;padding:0 var(--spacing-xl);display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:var(--spacing-xl)}.video-card{background:#fff;border-radius:var(--border-radius-lg);overflow:hidden;box-shadow:0 2px 10px var(--color-shadow);transition:all var(--transition-normal)}.video-card:hover{transform:translateY(-4px);box-shadow:0 6px 25px var(--color-shadow)}.video-card-image{position:relative;height:200px;overflow:hidden}.video-card-image img{width:100%;height:100%;object-fit:cover;transition:all var(--transition-slow)}.video-card:hover .video-card-image img{transform:scale(1.05)}.video-card-overlay{position:absolute;top:var(--spacing-sm);left:var(--spacing-sm);right:var(--spacing-sm);display:flex;justify-content:space-between}.video-duration,.video-category{padding:var(--spacing-xs) var(--spacing-sm);background:#000000b3;color:#fff;border-radius:var(--border-radius-sm);font-size:.875rem}.video-card-content{padding:var(--spacing-lg)}.video-card-title{font-size:1.125rem;margin-bottom:var(--spacing-sm);color:var(--color-text-primary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.video-card-description{font-size:.875rem;color:var(--color-text-secondary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:var(--spacing-md)}.video-card-meta{display:flex;justify-content:space-between;font-size:.875rem;color:var(--color-text-light)}.popular-card{position:relative;background:#fff;border-radius:var(--border-radius-lg);overflow:hidden;box-shadow:0 2px 10px var(--color-shadow);transition:all var(--transition-normal);display:flex;gap:var(--spacing-md);padding:var(--spacing-md)}.popular-card:hover{box-shadow:0 4px 20px var(--color-shadow)}.popular-rank{position:absolute;top:-5px;left:-5px;width:40px;height:40px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.2rem;box-shadow:0 2px 10px var(--color-shadow);z-index:2}.popular-image{flex-shrink:0;width:120px;height:80px;border-radius:var(--border-radius-md);overflow:hidden}.popular-image img{width:100%;height:100%;object-fit:cover}.popular-info{flex:1;display:flex;flex-direction:column;justify-content:center}.popular-info h4{font-size:1rem;margin-bottom:var(--spacing-xs);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.popular-meta{display:flex;gap:var(--spacing-md);font-size:.75rem;color:var(--color-text-light)}.category-section{background:var(--color-bg-secondary)}.category-section:nth-child(2n){background:#fff}.inspiration-section{background:linear-gradient(135deg,var(--color-info) 0%,var(--color-secondary) 100%);padding:var(--spacing-3xl) var(--spacing-xl);text-align:center;color:#fff}.inspiration-content h2{font-size:2.5rem;margin-bottom:var(--spacing-lg);text-shadow:2px 2px 4px rgba(0,0,0,.2)}.inspiration-content p{font-size:1.25rem;margin-bottom:var(--spacing-md);line-height:1.8}.inspiration-btn{display:inline-block;margin-top:var(--spacing-lg);padding:var(--spacing-md) var(--spacing-2xl);background:#fff;color:var(--color-info);border-radius:50px;font-weight:600;font-size:1.1rem;box-shadow:0 4px 20px #0003;transition:all var(--transition-normal)}.inspiration-btn:hover{transform:translateY(-4px) scale(1.05);box-shadow:0 6px 30px #0000004d}.video-detail-page{max-width:1400px;margin:0 auto;padding:var(--spacing-xl)}.video-player-container{margin-bottom:var(--spacing-xl);background:#000;border-radius:var(--border-radius-xl);overflow:hidden;box-shadow:0 4px 30px var(--color-shadow)}.video-player-wrapper{position:relative;padding-bottom:56.25%;height:0}.video-player{position:absolute;top:0;left:0;width:100%;height:100%}.video-loading,.video-error{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);color:#fff;font-size:1.25rem;text-align:center}.video-detail-content{display:grid;grid-template-columns:1fr 350px;gap:var(--spacing-xl)}.video-main{background:#fff;border-radius:var(--border-radius-lg);padding:var(--spacing-xl);box-shadow:0 2px 10px var(--color-shadow)}.video-title{font-size:2rem;margin-bottom:var(--spacing-md)}.video-meta-bar{display:flex;gap:var(--spacing-lg);padding:var(--spacing-md) 0;border-bottom:1px solid var(--color-border);margin-bottom:var(--spacing-xl);flex-wrap:wrap}.video-category-tag{padding:var(--spacing-xs) var(--spacing-md);background:var(--color-primary);color:#fff;border-radius:20px;font-size:.875rem;font-weight:500}.video-views,.video-rating,.video-duration{color:var(--color-text-secondary);font-size:.875rem}.video-description-section,.video-review-section{margin-bottom:var(--spacing-xl)}.video-description-section h2,.video-review-section h2{font-size:1.5rem;margin-bottom:var(--spacing-md);color:var(--color-text-primary)}.video-description,.video-review p{line-height:1.8;color:var(--color-text-secondary)}.video-review{padding:var(--spacing-lg);background:var(--color-bg-secondary);border-radius:var(--border-radius-md);border-left:4px solid var(--color-primary)}.video-sidebar{background:#fff;border-radius:var(--border-radius-lg);padding:var(--spacing-lg);box-shadow:0 2px 10px var(--color-shadow);height:fit-content}.sidebar-title{font-size:1.25rem;margin-bottom:var(--spacing-lg)}.related-videos{display:flex;flex-direction:column;gap:var(--spacing-md)}.related-video-card{display:flex;gap:var(--spacing-md);padding:var(--spacing-sm);border-radius:var(--border-radius-md);transition:all var(--transition-fast)}.related-video-card:hover{background:var(--color-bg-secondary)}.related-video-image{position:relative;flex-shrink:0;width:120px;height:80px;border-radius:var(--border-radius-sm);overflow:hidden}.related-video-image img{width:100%;height:100%;object-fit:cover}.related-video-duration{position:absolute;bottom:4px;right:4px;padding:2px 6px;background:#000c;color:#fff;border-radius:var(--border-radius-sm);font-size:.75rem}.related-video-info{flex:1}.related-video-info h4{font-size:.875rem;margin-bottom:var(--spacing-xs);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.related-video-meta{font-size:.75rem;color:var(--color-text-light)}.more-videos-section{margin-top:var(--spacing-3xl);padding-top:var(--spacing-3xl);border-top:2px solid var(--color-border)}.more-videos-section h2{margin-bottom:var(--spacing-xl)}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--spacing-xl)}.category-page{max-width:1400px;margin:0 auto;padding:var(--spacing-xl)}.category-header{text-align:center;padding:var(--spacing-3xl) 0;background:linear-gradient(135deg,var(--color-primary) 0%,var(--color-secondary) 100%);color:#fff;border-radius:var(--border-radius-xl);margin-bottom:var(--spacing-xl)}.category-header h1{font-size:3rem;margin-bottom:var(--spacing-md)}.category-description{font-size:1.25rem}.category-controls{display:flex;justify-content:space-between;align-items:center;margin-bottom:var(--spacing-xl);padding:var(--spacing-lg);background:#fff;border-radius:var(--border-radius-lg);box-shadow:0 2px 10px var(--color-shadow)}.sort-buttons{display:flex;gap:var(--spacing-sm)}.sort-buttons button{padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--border-radius-md);background:var(--color-bg-secondary);color:var(--color-text-primary);font-weight:500;transition:all var(--transition-fast)}.sort-buttons button:hover{background:var(--color-bg-tertiary)}.sort-buttons button.active{background:var(--color-primary);color:#fff}.result-count{color:var(--color-text-secondary);font-size:.875rem}.category-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:var(--spacing-xl)}.info-page{max-width:1200px;margin:0 auto;padding:var(--spacing-xl)}.info-hero{text-align:center;padding:var(--spacing-3xl) 0;background:linear-gradient(135deg,var(--color-info) 0%,var(--color-secondary) 100%);color:#fff;border-radius:var(--border-radius-xl);margin-bottom:var(--spacing-3xl)}.info-hero h1{font-size:3rem;margin-bottom:var(--spacing-md)}.info-subtitle{font-size:1.5rem;opacity:.9}.info-content{background:#fff;border-radius:var(--border-radius-xl);padding:var(--spacing-3xl);box-shadow:0 2px 20px var(--color-shadow)}.info-section{margin-bottom:var(--spacing-3xl);padding-bottom:var(--spacing-3xl);border-bottom:2px solid var(--color-border)}.info-section:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.info-section h2{font-size:2rem;margin-bottom:var(--spacing-xl);color:var(--color-primary)}.info-section h3{font-size:1.5rem;margin-top:var(--spacing-xl);margin-bottom:var(--spacing-md)}.info-text p{line-height:1.8;margin-bottom:var(--spacing-lg)}.info-text ul,.info-text ol{margin-left:var(--spacing-xl);margin-bottom:var(--spacing-lg)}.info-text li{line-height:1.8;margin-bottom:var(--spacing-sm)}.timeline{position:relative;padding-left:var(--spacing-xl)}.timeline:before{content:"";position:absolute;left:0;top:0;bottom:0;width:2px;background:var(--color-primary)}.timeline-item{position:relative;margin-bottom:var(--spacing-xl)}.timeline-marker{position:absolute;left:-29px;top:0;width:16px;height:16px;background:var(--color-primary);border:4px solid white;border-radius:50%;box-shadow:0 0 0 3px var(--color-primary)}.timeline-content h3{font-size:1.25rem;margin-bottom:var(--spacing-sm);color:var(--color-primary)}.mission-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-xl)}.mission-card{padding:var(--spacing-xl);background:var(--color-bg-secondary);border-radius:var(--border-radius-lg);text-align:center;transition:all var(--transition-normal)}.mission-card:hover{transform:translateY(-4px);box-shadow:0 4px 20px var(--color-shadow)}.mission-icon{font-size:3rem;margin-bottom:var(--spacing-md)}.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:var(--spacing-xl)}.contact-item{padding:var(--spacing-xl);background:var(--color-bg-secondary);border-radius:var(--border-radius-lg);text-align:center}.contact-icon{font-size:2.5rem;margin-bottom:var(--spacing-md)}.contact-item h3{margin-bottom:var(--spacing-md)}.contact-item p{color:var(--color-text-secondary);margin-bottom:var(--spacing-sm)}.support-contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:var(--spacing-xl)}.support-card{padding:var(--spacing-xl);background:var(--color-bg-secondary);border-radius:var(--border-radius-lg);text-align:center;transition:all var(--transition-normal)}.support-card:hover{transform:translateY(-4px);box-shadow:0 4px 20px var(--color-shadow)}.support-icon{font-size:3rem;margin-bottom:var(--spacing-md)}.support-highlight{font-size:1.25rem;font-weight:600;color:var(--color-primary);margin-bottom:var(--spacing-sm)}.faq-section{display:flex;flex-direction:column;gap:var(--spacing-2xl)}.faq-category h3{font-size:1.5rem;margin-bottom:var(--spacing-lg);color:var(--color-primary)}.faq-item{padding:var(--spacing-lg);background:var(--color-bg-secondary);border-radius:var(--border-radius-md);margin-bottom:var(--spacing-md)}.faq-item h4{font-size:1.125rem;margin-bottom:var(--spacing-sm)}.faq-item p{line-height:1.8;color:var(--color-text-secondary)}.guide-section{display:flex;flex-direction:column;gap:var(--spacing-xl)}.guide-step{display:flex;gap:var(--spacing-lg);padding:var(--spacing-lg);background:var(--color-bg-secondary);border-radius:var(--border-radius-lg)}.guide-number{flex-shrink:0;width:50px;height:50px;background:linear-gradient(135deg,var(--color-primary),var(--color-secondary));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700}.guide-content h3{font-size:1.25rem;margin-bottom:var(--spacing-sm)}.guide-content p{line-height:1.8;color:var(--color-text-secondary)}.guide-tips{padding:var(--spacing-xl);background:linear-gradient(135deg,var(--color-accent) 0%,var(--color-warning) 100%);border-radius:var(--border-radius-lg);margin-top:var(--spacing-xl)}.guide-tips h3{margin-bottom:var(--spacing-md)}.guide-tips ul{list-style:none;margin:0}.guide-tips li{padding:var(--spacing-sm) 0;font-size:1rem;line-height:1.6}.feedback-list{margin-left:0;list-style:none}.feedback-list li{padding:var(--spacing-sm) 0;font-size:1.125rem}.contact-legal-list{margin-left:0;list-style:none}.contact-legal-list li{padding:var(--spacing-sm) 0;font-size:1.125rem}.update-list{display:flex;flex-direction:column;gap:var(--spacing-lg)}.update-item{padding:var(--spacing-lg);background:var(--color-bg-secondary);border-radius:var(--border-radius-md);border-left:4px solid var(--color-primary)}.update-item h3{font-size:1.125rem;margin-bottom:var(--spacing-sm);color:var(--color-primary)}.update-item p{color:var(--color-text-secondary);margin:0}.loading-page{min-height:60vh;display:flex;align-items:center;justify-content:center;font-size:1.5rem;color:var(--color-text-secondary)}@media(max-width:1024px){.video-detail-content{grid-template-columns:1fr}.video-sidebar{margin-top:var(--spacing-xl)}.related-videos{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:var(--spacing-md)}}@media(max-width:768px){.header-container{padding:var(--spacing-md) var(--spacing-lg)}.nav{position:fixed;top:80px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:var(--spacing-lg);box-shadow:0 4px 20px var(--color-shadow);transform:translateY(-100%);opacity:0;visibility:hidden;transition:all var(--transition-normal)}.nav.nav-open{transform:translateY(0);opacity:1;visibility:visible}.nav-link{color:var(--color-text-primary);padding:var(--spacing-md)}.dropdown-content{position:static;display:block;box-shadow:none;background:var(--color-bg-secondary);margin-top:var(--spacing-sm)}.menu-toggle{display:flex}.hero-title{font-size:2rem}.hero-subtitle{font-size:1.25rem}.hero-description{font-size:1rem}.section-title{font-size:1.5rem}.featured-carousel,.video-grid-masonry,.video-grid-compact,.video-grid-horizontal,.video-grid,.category-grid,.footer-container{grid-template-columns:1fr}.category-controls{flex-direction:column;gap:var(--spacing-md);align-items:stretch}.sort-buttons{justify-content:center}.info-hero h1{font-size:2rem}.info-subtitle{font-size:1.25rem}.info-content{padding:var(--spacing-xl)}.mission-grid,.contact-grid,.support-contact-grid{grid-template-columns:1fr}}@media(max-width:480px){h1{font-size:1.75rem}h2{font-size:1.5rem}h3{font-size:1.25rem}.hero-section{padding:var(--spacing-2xl) var(--spacing-lg);min-height:400px}.hero-title{font-size:1.75rem}.section-header{flex-direction:column;align-items:flex-start;gap:var(--spacing-sm)}.popular-card{flex-direction:column}.popular-image{width:100%;height:180px}.video-card-image{height:180px}.featured-image{height:300px}}