:root{--primary-color: #ff6b6b;--secondary-color: #4ecdc4;--accent-color: #45b7d1;--dark-bg: #1a1a2e;--darker-bg: #16213e;--light-text: #ffffff;--gray-text: #b8b8b8;--card-bg: #2a2a3e;--hover-color: #ff8e8e;--success-color: #4caf50;--warning-color: #ff9800;--error-color: #f44336;--border-radius: 12px;--box-shadow: 0 8px 32px rgba(0, 0, 0, .3);--transition: all .3s cubic-bezier(.4, 0, .2, 1);--font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-family);background:linear-gradient(135deg,var(--dark-bg) 0%,var(--darker-bg) 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2rem;display:flex;justify-content:space-between;align-items:center}.logo{font-size:2rem;font-weight:700;background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;text-decoration:none;transition:var(--transition)}.logo:hover{transform:scale(1.05)}.nav-menu{display:flex;list-style:none;gap:2rem;align-items:center}.nav-item a{color:var(--light-text);text-decoration:none;padding:.5rem 1rem;border-radius:var(--border-radius);transition:var(--transition);position:relative}.nav-item a:hover,.nav-item a.active{background:#ff6b6b33;color:var(--primary-color)}.search-container{position:relative;display:flex;align-items:center}.search-input{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:25px;padding:.5rem 1rem;color:var(--light-text);width:250px;transition:var(--transition)}.search-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #ff6b6b33}.search-btn{background:var(--primary-color);border:none;border-radius:50%;width:40px;height:40px;margin-left:10px;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:var(--transition)}.search-btn:hover{background:var(--hover-color);transform:scale(1.1)}.mobile-menu-toggle{display:none;background:none;border:none;color:var(--light-text);font-size:1.5rem;cursor:pointer}#main-content{max-width:1200px;margin:0 auto;padding:2rem;min-height:calc(100vh - 200px);position:relative;z-index:1}.hero-section{text-align:center;padding:4rem 0;background:linear-gradient(135deg,#ff6b6b1a,#4ecdc41a);border-radius:var(--border-radius);margin-bottom:3rem;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.1)}.hero-title{font-size:3rem;margin-bottom:1rem;background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;font-weight:700}.hero-subtitle{font-size:1.2rem;color:var(--gray-text);margin-bottom:2rem;line-height:1.6}.hero-cta{background:linear-gradient(45deg,var(--primary-color),var(--hover-color));color:#fff;padding:1rem 2rem;border:none;border-radius:var(--border-radius);font-size:1.1rem;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-block;font-weight:600;box-shadow:0 4px 15px #ff6b6b4d}.hero-cta:hover{transform:translateY(-2px);box-shadow:0 8px 25px #ff6b6b66}.video-section{margin-bottom:4rem;position:relative}.section-title{font-size:2rem;margin-bottom:2rem;color:var(--primary-color);text-align:center;font-weight:700;position:relative}.section-title:after{content:"";position:absolute;bottom:-10px;left:50%;transform:translate(-50%);width:60px;height:3px;background:linear-gradient(45deg,var(--primary-color),var(--secondary-color));border-radius:2px}.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:2rem;margin:2rem 0;position:relative}.video-card{background:var(--card-bg);border-radius:var(--border-radius);overflow:hidden;transition:var(--transition);cursor:pointer;position:relative;border:1px solid rgba(255,255,255,.1);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.video-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #0006;border-color:var(--primary-color)}.video-thumbnail-container{position:relative;overflow:hidden;height:200px}.video-thumbnail{width:100%;height:200px;-o-object-fit:cover;object-fit:cover;transition:var(--transition)}.video-card:hover .video-thumbnail{transform:scale(1.05)}.video-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:#00000080;display:flex;align-items:center;justify-content:center;opacity:0;transition:var(--transition)}.video-card:hover 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#ff6b6b33}.form-btn{width:100%;padding:.75rem;background:linear-gradient(45deg,var(--primary-color),var(--hover-color));border:none;border-radius:var(--border-radius);color:#fff;font-size:1rem;cursor:pointer;transition:var(--transition);font-weight:600}.form-btn:hover{transform:translateY(-2px);box-shadow:var(--box-shadow)}.form-options{display:flex;justify-content:space-between;align-items:center}.checkbox-label{display:flex;align-items:center;color:var(--gray-text);font-size:.9rem}.form-checkbox{margin-right:.5rem}.forgot-password{color:var(--primary-color);text-decoration:none;font-size:.9rem}.forgot-password:hover{text-decoration:underline}.form-divider{text-align:center;margin:2rem 0;position:relative;color:var(--gray-text)}.form-divider:before{content:"";position:absolute;top:50%;left:0;right:0;height:1px;background:#fff3}.form-divider span{background:var(--card-bg);padding:0 1rem}.social-login{display:flex;gap:1rem}.social-btn{flex:1;padding:.75rem;border:1px solid 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480px){.hero-title{font-size:1.5rem}.video-grid{grid-template-columns:1fr}.category-nav{justify-content:flex-start;overflow-x:auto;padding-bottom:.5rem}.category-btn{white-space:nowrap}}.text-center{text-align:center}.hidden{display:none!important}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--dark-bg)}::-webkit-scrollbar-thumb{background:var(--primary-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--hover-color)}.player-page{max-width:1000px;margin:0 auto;padding:2rem 0}.player-container{background:var(--card-bg);border-radius:var(--border-radius);overflow:hidden;margin-bottom:2rem;border:1px solid rgba(255,255,255,.1)}.video-player-wrapper{position:relative;width:100%;padding-bottom:56.25%;background-color:#000}.video-player{position:absolute;top:0;left:0;width:100%;height:100%;-o-object-fit:contain;object-fit:contain}.player-controls{padding:1rem 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option{background:var(--dark-bg);color:var(--light-text)}.progress-container{width:100%;height:8px;background:#fff3;border-radius:4px;margin-top:1rem;position:relative;cursor:pointer}.progress-bar{height:100%;width:0%;background:var(--primary-color);border-radius:4px;position:relative}.progress-filled{height:100%;background:var(--primary-color);border-radius:4px;width:0%}.progress-handle{position:absolute;top:50%;left:0%;transform:translate(-50%,-50%);width:16px;height:16px;background:var(--light-text);border-radius:50%;box-shadow:0 0 5px #00000080;display:none}.progress-container:hover .progress-handle{display:block}.video-details{background:var(--card-bg);border-radius:var(--border-radius);padding:2rem;margin-bottom:2rem;border:1px solid rgba(255,255,255,.1)}.video-main-info{margin-bottom:1.5rem}.video-details .video-title{font-size:2rem;margin-bottom:1rem;color:var(--primary-color);-webkit-line-clamp:unset}.video-meta-info{display:flex;flex-wrap:wrap;gap:1.5rem;margin-bottom:1.5rem;color:var(--gray-text);font-size:.95rem}.meta-item{display:flex;align-items:center;gap:.5rem}.meta-label{font-weight:500;color:var(--light-text)}.video-actions{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:2rem}.action-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:var(--light-text);padding:.75rem 1.5rem;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);display:flex;align-items:center;gap:.5rem;font-size:1rem}.action-btn:hover{background:#fff3;border-color:var(--primary-color);color:var(--primary-color)}.action-btn.primary{background:linear-gradient(45deg,var(--primary-color),var(--hover-color));border-color:var(--primary-color);color:#fff}.action-btn.primary:hover{box-shadow:0 4px 15px #ff6b6b4d;transform:translateY(-2px)}.video-description h3{font-size:1.2rem;color:var(--secondary-color);margin-bottom:.8rem}.video-description p{color:var(--gray-text);line-height:1.7}.related-videos{margin-bottom:2rem}.related-videos .section-title{text-align:left;margin-bottom:1.5rem}.related-videos .section-title:after{display:none}.related-videos .video-grid{grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem}.related-video-card .video-thumbnail-container,.related-video-card .video-thumbnail{height:120px}.related-video-card .video-info{padding:1rem}.related-video-card .video-title{font-size:.95rem;-webkit-line-clamp:2}.related-video-card .video-meta{font-size:.75rem}.comments-section{background:var(--card-bg);border-radius:var(--border-radius);padding:2rem;border:1px solid rgba(255,255,255,.1)}.comments-section .section-title{text-align:left;margin-bottom:1.5rem}.comments-section 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.page-subtitle{font-size:1.1rem;color:var(--gray-text)}.category-navigation{background:var(--card-bg);border-radius:var(--border-radius);padding:2rem;margin-bottom:2rem;border:1px solid rgba(255,255,255,.1)}.category-navigation .nav-title{font-size:1.5rem;color:var(--secondary-color);margin-bottom:1.5rem;text-align:center}.category-navigation .category-nav{margin-bottom:1.5rem}.category-navigation .subcategory-nav{margin-top:2rem;border-top:1px solid rgba(255,255,255,.1);padding-top:1.5rem}.category-navigation .nav-subtitle{font-size:1.2rem;color:var(--accent-color);margin-bottom:1rem;text-align:center}.filter-section{background:var(--card-bg);border-radius:var(--border-radius);padding:1.5rem 2rem;margin-bottom:2rem;display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;border:1px solid rgba(255,255,255,.1)}.filter-controls{display:flex;flex-wrap:wrap;gap:1.5rem;align-items:center}.sort-options label{color:var(--light-text);margin-right:.5rem}.sort-select{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:var(--light-text);padding:.4rem .8rem;font-size:.9rem;cursor:pointer;transition:var(--transition)}.sort-select:hover{border-color:var(--primary-color)}.sort-select option{background:var(--dark-bg);color:var(--light-text)}.view-options{display:flex;gap:.5rem}.view-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:var(--light-text);padding:.5rem;border-radius:8px;cursor:pointer;transition:var(--transition);display:flex;align-items:center;justify-content:center}.view-btn:hover,.view-btn.active{background:var(--primary-color);border-color:var(--primary-color);color:#fff}.results-info{color:var(--gray-text);font-size:.9rem}.no-results{text-align:center;padding:4rem 2rem;background:var(--card-bg);border-radius:var(--border-radius);border:1px solid rgba(255,255,255,.1);margin-top:2rem}.no-results-icon{color:var(--gray-text);margin-bottom:1rem}.no-results h3{font-size:1.8rem;color:var(--light-text);margin-bottom:.8rem}.no-results p{color:var(--gray-text);margin-bottom:2rem}.load-more-section{text-align:center;margin-top:3rem}.load-more-btn{background:linear-gradient(45deg,var(--secondary-color),var(--accent-color));border:none;color:#fff;padding:1rem 2.5rem;border-radius:var(--border-radius);font-size:1.1rem;cursor:pointer;transition:var(--transition);font-weight:600;box-shadow:0 4px 15px #4ecdc44d}.load-more-btn:hover{transform:translateY(-2px);box-shadow:0 8px 25px #4ecdc466}.profile-page{max-width:900px;margin:0 auto;padding:2rem 0}.profile-container{background:var(--card-bg);border-radius:var(--border-radius);border:1px solid rgba(255,255,255,.1);padding:2rem}.profile-header{display:flex;flex-wrap:wrap;align-items:center;gap:2rem;margin-bottom:2rem;padding-bottom:2rem;border-bottom:1px solid rgba(255,255,255,.1)}.profile-avatar{position:relative;width:120px;height:120px;flex-shrink:0}.avatar-image{width:100%;height:100%;border-radius:50%;-o-object-fit:cover;object-fit:cover;border:3px solid var(--primary-color)}.avatar-upload-btn{position:absolute;bottom:0;right:0;background:var(--secondary-color);border:none;border-radius:50%;width:36px;height:36px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:var(--transition)}.avatar-upload-btn:hover{background:var(--accent-color);transform:scale(1.1)}.profile-info{flex-grow:1}.profile-name{font-size:2rem;color:var(--light-text);margin-bottom:.5rem}.profile-email,.profile-join-date{color:var(--gray-text);font-size:.95rem;margin-bottom:.25rem}.profile-stats{display:flex;gap:1.5rem;text-align:center}.stat-item{background:#ffffff0d;padding:.8rem 1.2rem;border-radius:var(--border-radius);border:1px solid rgba(255,255,255,.1)}.stat-number{font-size:1.5rem;font-weight:700;color:var(--primary-color);margin-bottom:.2rem}.stat-label{font-size:.8rem;color:var(--gray-text)}.profile-nav{display:flex;flex-wrap:wrap;gap:1rem;margin-bottom:2rem;border-bottom:1px solid rgba(255,255,255,.1);padding-bottom:1rem}.profile-nav-btn{background:none;border:none;color:var(--gray-text);padding:.8rem 1.5rem;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);font-size:1rem;font-weight:500}.profile-nav-btn:hover,.profile-nav-btn.active{color:var(--primary-color);background:#ff6b6b1a}.profile-tab{display:none}.profile-tab.active{display:block}.info-section .section-title,.favorites-section .section-title,.history-section .section-title,.settings-section .section-title{font-size:1.5rem;color:var(--secondary-color);margin-bottom:1.5rem;text-align:left}.profile-form .form-group{margin-bottom:1rem}.profile-form .form-btn{margin-top:1.5rem;width:auto;padding:.75rem 2rem}.favorites-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:1.5rem}.favorite-video-card{background:#ffffff0d;border-radius:var(--border-radius);overflow:hidden;position:relative;transition:var(--transition);cursor:pointer;border:1px solid rgba(255,255,255,.1)}.favorite-video-card:hover{transform:translateY(-5px);box-shadow:0 8px 20px #0000004d}.favorite-thumbnail{width:100%;height:120px;-o-object-fit:cover;object-fit:cover}.favorite-info{padding:1rem}.favorite-title{font-size:1rem;font-weight:700;color:var(--light-text);margin-bottom:.25rem;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.favorite-category{font-size:.8rem;color:var(--gray-text)}.remove-favorite-btn{position:absolute;top:10px;right:10px;background:#ff6b6bcc;border:none;border-radius:50%;width:30px;height:30px;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;transition:var(--transition);opacity:0}.favorite-video-card:hover .remove-favorite-btn{opacity:1}.remove-favorite-btn:hover{background:var(--error-color);transform:scale(1.1)}.history-list{display:flex;flex-direction:column;gap:1rem}.history-item{display:flex;align-items:center;gap:1rem;background:#ffffff0d;border-radius:var(--border-radius);padding:1rem;border:1px solid rgba(255,255,255,.1);transition:var(--transition)}.history-item:hover{background:#ffffff1a}.history-thumbnail{width:100px;height:60px;-o-object-fit:cover;object-fit:cover;border-radius:8px;flex-shrink:0}.history-info{flex-grow:1}.history-title{font-size:1rem;font-weight:700;color:var(--light-text);margin-bottom:.25rem;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}.history-progress,.history-time{font-size:.85rem;color:var(--gray-text)}.continue-watch-btn{background:linear-gradient(45deg,var(--primary-color),var(--hover-color));border:none;color:#fff;padding:.6rem 1.2rem;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);font-weight:500;flex-shrink:0}.continue-watch-btn:hover{transform:translateY(-2px);box-shadow:0 4px 10px #ff6b6b4d}.settings-group{margin-bottom:2rem;padding-bottom:1.5rem;border-bottom:1px solid rgba(255,255,255,.05)}.settings-group:last-child{border-bottom:none;margin-bottom:0;padding-bottom:0}.settings-group h3{font-size:1.2rem;color:var(--light-text);margin-bottom:1rem}.setting-item{display:flex;justify-content:space-between;align-items:center;padding:.8rem 0;border-bottom:1px solid rgba(255,255,255,.02)}.setting-item:last-child{border-bottom:none}.setting-label{color:var(--gray-text);display:flex;align-items:center;gap:.5rem;cursor:pointer}.setting-checkbox{width:18px;height:18px;accent-color:var(--primary-color)}.setting-select{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);border-radius:8px;color:var(--light-text);padding:.4rem .8rem;font-size:.9rem;cursor:pointer;transition:var(--transition)}.setting-select option{background:var(--dark-bg);color:var(--light-text)}.setting-btn{background:#ffffff1a;border:1px solid rgba(255,255,255,.2);color:var(--light-text);padding:.75rem 1.5rem;border-radius:var(--border-radius);cursor:pointer;transition:var(--transition);font-size:.95rem;margin-right:1rem;margin-bottom:1rem}.setting-btn:hover{background:#fff3;border-color:var(--secondary-color);color:var(--secondary-color)}.info-page{max-width:900px;margin:0 auto;padding:2rem;background:var(--card-bg);border-radius:var(--border-radius);line-height:1.8;border:1px solid rgba(255,255,255,.1)}.info-header{text-align:center;margin-bottom:3rem}.info-page .info-title{color:var(--primary-color);margin-bottom:1rem;font-size:2.5rem}.info-breadcrumb{color:var(--gray-text);font-size:.9rem}.info-breadcrumb a{color:var(--primary-color);text-decoration:none}.breadcrumb-separator{margin:0 .5rem}.info-section{margin-bottom:3rem}.info-section .section-title{color:var(--secondary-color);margin-bottom:1.5rem;font-size:1.5rem;text-align:left}.info-section .section-title:after{display:none}.content-paragraph{margin-bottom:1rem;color:var(--light-text)}.contact-section{margin-top:3rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:1.5rem;margin-top:1.5rem}.contact-item{background:#ffffff0d;border-radius:var(--border-radius);padding:1.5rem;display:flex;align-items:center;gap:1rem;border:1px solid rgba(255,255,255,.1)}.contact-icon{color:var(--primary-color);flex-shrink:0}.contact-info h3{font-size:1.1rem;color:var(--light-text);margin-bottom:.2rem}.contact-info p{font-size:.9rem;color:var(--gray-text)}.faq-section{margin-top:3rem;padding-top:2rem;border-top:1px solid rgba(255,255,255,.1)}.faq-list{display:flex;flex-direction:column;gap:1rem;margin-top:1.5rem}.faq-item{background:#ffffff0d;border-radius:var(--border-radius);border:1px solid rgba(255,255,255,.1);overflow:hidden}.faq-question{display:flex;justify-content:space-between;align-items:center;padding:1rem 1.5rem;cursor:pointer;background:#ffffff05;transition:var(--transition)}.faq-question:hover{background:#ffffff14}.faq-question h3{font-size:1.1rem;color:var(--light-text);margin:0}.faq-toggle{background:none;border:none;color:var(--gray-text);cursor:pointer;transition:transform .3s ease}.faq-item.open .faq-toggle{transform:rotate(180deg)}.faq-answer{padding:0 1.5rem 1rem;color:var(--gray-text);max-height:0;overflow:hidden;transition:max-height .5s ease-out,padding .5s ease-out}.faq-item.open .faq-answer{max-height:200px;padding:0 1.5rem 1.5rem}.back-to-top{position:fixed;bottom:30px;right:30px;background:var(--primary-color);color:#fff;border:none;border-radius:50%;width:50px;height:50px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 15px #ff6b6b4d;transition:var(--transition);z-index:999;opacity:0;visibility:hidden}.back-to-top.show{opacity:1;visibility:visible}.back-to-top:hover{transform:translateY(-5px);box-shadow:0 8px 25px #ff6b6b66}@media (max-width: 768px){.player-page{padding:1rem 0}.player-controls{flex-direction:column;align-items:flex-start;padding:1rem}.control-buttons{width:100%;justify-content:space-between}.quality-selector,.speed-selector{width:100%;margin-top:.5rem}.video-details{padding:1.5rem}.video-details .video-title{font-size:1.5rem}.video-meta-info{flex-direction:column;gap:.5rem}.video-actions{flex-direction:column}.action-btn{width:100%;justify-content:center}.related-videos .video-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr))}.comments-section{padding:1.5rem}.comment-submit{width:100%}.profile-header{flex-direction:column;text-align:center}.profile-avatar{margin-bottom:1rem}.profile-stats{width:100%;justify-content:space-around;margin-top:1rem}.profile-nav{justify-content:center}.favorites-grid,.history-list{grid-template-columns:1fr}.history-item{flex-direction:column;align-items:flex-start}.continue-watch-btn{width:100%;margin-top:.5rem}.contact-grid{grid-template-columns:1fr}}