:root{--primary-color: #6366f1;--primary-hover: #5855eb;--bg-primary: #0a0a0a;--bg-secondary: #1a1a1a;--bg-card: #242424;--text-primary: #ffffff;--text-secondary: #b3b3b3;--border-color: #333333;--bg-card: #2a2a2a;--success-color: #10b981;--warning-color: #f59e0b;--error-color: #ef4444;--bg-gradient: linear-gradient(135deg, #3b82f6, #e462fe)}html{scroll-behavior:smooth}html,body{background:#000000;overscroll-behavior-y:none}body{font-family:Inter,sans-serif;line-height:1.6;color:#fff;background-color:#000}video{width:100%;display:block}button:disabled{cursor:not-allowed}.bg-linear{background:var(--bg-gradient)}.scrollbar::-webkit-scrollbar{width:6px;background-color:#00000080}.scrollbar::-webkit-scrollbar-thumb{background-color:#333;border-radius:5px}.scrollbar::-webkit-scrollbar-thumb:hover{background-color:#333}.icon{width:20px;height:20px;flex-shrink:0;background:url() no-repeat center center;background-size:100% 100%}.icon.w-18{width:18px;height:18px}.icon.play{background-image:url(/images/icon-play.png)}.icon.arrow{background-image:url(/images/icon-arrow.png)}.icon.mobile{background-image:url(/images/icon-mobile.png)}.icon.check{background-image:url(/images/icon-check.png)}.icon.close{background-image:url(/images/close.png)}.icon.bars{background-image:url(/images/icon-bars.png)}.icon.points{background-image:url(/images/icon-points.png)}.icon.big{background-image:url(/images/icon-big.png)}.icon.delete{background-image:url(/images/icon-delete.png)}.flex{display:flex}.flex-center{display:flex;align-items:center;justify-content:center}.container{max-width:1200px;margin:0 auto;padding:0 20px}.navbar{position:sticky;top:0;left:0;width:100%;background:#000000;-webkit-backdrop-filter:none;backdrop-filter:none;border-bottom:1px solid var(--border-color);z-index:1000;transition:box-shadow .3s ease}.navbar .promotion{height:50px;color:#fff;background:#885df6;gap:20px;cursor:pointer;text-decoration:none}.navbar .promotion svg{width:20px;margin:0 4px;transition:all .15s linear}.navbar .promotion .check{text-decoration:underline}.navbar .promotion:hover .check{text-decoration:none}.navbar .promotion:hover svg{transform:rotate(45deg)}.nav-container{width:100%;display:flex;align-items:center;justify-content:space-between;height:64px;padding:0 30px}.nav-container .nav-logo{flex-shrink:0;position:relative}.nav-container .nav-logo .icon{display:none;margin-right:10px}.nav-container .nav-right-group{display:flex;align-items:center;gap:1rem;position:relative;z-index:100}.nav-logo .logo-link{text-decoration:none;color:inherit}.nav-logo .logo-link img{display:block;width:100px}.nav-logo .logo-text{font-size:1.5rem;font-weight:700}.menu-layout{width:100vw;height:calc(100vh - 110px);color:#fff;left:0;top:114px;padding:0 25px 50px;position:absolute;background:#0d0d12;border-top:1px solid #454352;overflow-y:scroll}.menu-layout .nav-link{display:block;padding:20px 0;cursor:pointer;border-bottom:1px solid #454352}.menu-layout .item{border-bottom:1px solid #454352}.menu-layout .item .title{outline:none;padding:20px 0;display:flex;align-items:center;justify-content:space-between}.menu-layout .item .title .icon.up{transform:rotate(180deg)}.menu-layout .item .title.pointer{cursor:pointer}.menu-layout .item .title:hover strong{opacity:.7}.menu-layout .item .title .fas{font-size:14px;padding:0 6px}.menu-layout .item ul,.menu-layout .item li{margin:0}.menu-layout .item li{font-size:.875rem;list-style:none;padding:0 0 20px}.menu-layout .item li.pointer{cursor:pointer}.menu-layout .item p{opacity:.65;padding-left:10px}.menu-layout .item .icon-top{display:flex;align-items:center;gap:10px;font-weight:700;padding:0 0 4px 10px}.menu-layout .item .icon-top svg{width:18px}.menu-layout .item .ai-tool-tag{padding:5px 0 0}.menu-layout .item .ai-tool-tag .tag{color:#fff;margin:0 10px;cursor:pointer;display:inline-block;text-decoration:none}.menu-layout .item .ai-tool-tag .tag:hover{text-decoration:underline}.menu-layout .item .ai-tool-tag .tag.more{font-weight:600;color:#ff1b2a}.menu-layout .item .bold{cursor:auto;font-weight:700;padding:15px 0 15px 20px;border-top:1px solid #454352}.menu-layout .item .ai-model-tag{display:flex;flex-wrap:wrap;gap:10px;padding:0 10px}.menu-layout .item .ai-model-tag .tag{padding:0 10px;opacity:.65;cursor:pointer}.menu-layout .item .ai-model-tag .tag:hover{opacity:1;text-decoration:underline}.nav-menu{display:flex;gap:30px;margin-right:30px}.nav-link{text-decoration:none;color:#fff;font-weight:500;transition:color .3s ease;position:relative;cursor:pointer}.nav-link .icon.arrow{width:12px;height:12px}.nav-link:hover,.nav-link.active{color:#6b7280}.nav-link.active:after{content:"";position:absolute;bottom:-5px;left:0;width:100%;height:2px;background:#6b7280}.nav-right{display:flex;align-items:center;gap:1rem}.language-selector{display:flex;align-items:center;gap:.5rem;padding:.5rem;border-radius:8px;background:#1a1a1a;font-size:.9rem;color:#fff}.download-app-btn{color:#fff;border:none;height:36px;padding:0 15px;border-radius:8px;font-weight:500;cursor:pointer;transition:all .3s ease;font-size:.9rem;gap:.3rem;position:relative}.download-app-btn .qrcode{display:none;position:absolute;width:200px;height:200px;left:50%;top:50px;padding:5px;background:#fff;border-radius:10px;transform:translate(-50%)}.download-app-btn .qrcode img{display:block;width:100%;border-radius:10px}.download-app-btn:hover{background:linear-gradient(135deg,#2563eb,#7c3aed)}.download-app-btn:hover .qrcode{display:block}.download-app-btn i{font-size:1rem}.user-icon{width:40px;height:40px;border-radius:20px;background:#875ef5}.user-icon svg{width:70%}.nav-dropdown{position:relative;display:inline-block}.nav-dropdown .nav-link{display:flex;align-items:center;gap:.3rem}.nav-dropdown .nav-link:hover i{transform:translateY(2px) rotate(180deg)}.nav-dropdown .nav-link i{font-size:.8rem;transform:translateY(2px);transition:transform .3s ease}.dropdown-menu{position:absolute;top:calc(100% + 20px);left:50%;transform:translate(-50%);background:rgba(20,20,20,.95);border:1px solid #333333;border-radius:12px;box-shadow:0 8px 32px #00000080;opacity:0;visibility:hidden;transition:all .3s cubic-bezier(.4,0,.2,1);z-index:9999;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);padding:20px}.dropdown-menu.video{position:fixed;top:114px;left:50%;width:min(1000px,calc(100vw - 48px));max-height:calc(100vh - 130px);overflow-x:hidden;overflow-y:auto;transform:translate(-50%);scrollbar-color:#4b4b4b transparent;scrollbar-width:thin}.dropdown-menu.video .dropdown-item:hover{background-color:#3b82f61a}.dropdown-menu.tools{width:560px;padding-bottom:.2rem}.dropdown-menu.tools .dropdown-grid{justify-content:space-between}.dropdown-menu.tools .dropdown-item{padding:10px 25px}@media (max-width: 1100px){.dropdown-menu.video{width:calc(100vw - 32px);padding:16px}.dropdown-menu.video .dropdown-grid{flex-wrap:wrap;gap:8px}.dropdown-menu.video .dropdown-item{flex:1 1 calc(50% - 8px);min-width:260px}}.dropdown-grid{display:flex}.tools-grid{grid-template-columns:repeat(2,1fr)}.nav-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translate(-50%) translateY(0)}.dropdown-item{flex:1;padding:10px;color:#fff;text-decoration:none;transition:all .3s ease;border-radius:8px;cursor:pointer;margin-bottom:.25rem}.dropdown-item:last-child{margin-bottom:0}.dropdown-item.disabled:hover{cursor:auto}.dropdown-item .tool-list{padding:15px 0 0 10px;border-top:1px solid var(--border-color)}.dropdown-item .tool-list .item{line-height:34px;display:block;font-size:14px;color:#a0a0a0;text-decoration:none}.dropdown-item .tool-list .item:hover{color:#f56060}.dropdown-item .tool-list .more{color:#ee444f;margin-top:6px;font-weight:600}.dropdown-item .tool-list .more:hover{text-decoration:underline}.dropdown-top{display:flex;align-items:center;margin-bottom:20px;flex-shrink:0;color:#fff}.dropdown-top .dropdown-icon{width:36px;height:36px;flex-shrink:0;border-radius:8px;margin-right:.8rem;background:linear-gradient(135deg,#ef4444,#ec4899)}.dropdown-top .dropdown-icon svg{width:20px}.dropdown-top h4{font-size:.88rem;font-weight:600;line-height:1.4}.dropdown-top i{font-size:1.1rem}.dropdown-content{flex:1}.dropdown-content{font-size:.85rem;color:#a0a0a0;line-height:1.4}.dropdown-divider{height:1px;background:#333333;margin:1rem 0}.dropdown-section{padding:.5rem 0}.dropdown-section .section-title{margin:0 0 1rem;font-size:.9rem;font-weight:600;color:#fff;text-align:center}.model-tags{display:flex;flex-wrap:wrap;gap:.5rem;justify-content:center}.model-tags .tag{display:inline-block;padding:.2rem .5rem;background:rgba(59,130,246,.1);border:1px solid rgba(59,130,246,.3);border-radius:20px;color:#3b82f6;text-decoration:none;font-size:12px;font-weight:500;transition:all .3s ease;white-space:nowrap;cursor:pointer}.model-tags .tag:hover{background:rgba(59,130,246,.3);border-color:#3b82f699;color:#60a5fa}.hero{background:#000000;color:#fff;height:calc(100vh - 114px);text-align:center;position:relative;overflow:hidden}.hero .hero-video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:.3;z-index:1}.hero .hero-content{position:relative;z-index:2;max-width:800px}.hero .hero-title{font-size:3.5rem;font-weight:700;margin-bottom:2.8rem;line-height:1.2;color:#fff}.hero .cta-button{color:#fff;border:none;padding:1.2rem 3.6rem;font-size:1.2rem;font-weight:600;border-radius:12px;cursor:pointer;transition:all .3s ease;text-decoration:none;box-shadow:0 4px 20px #3b82f666;border:2px solid transparent;background-clip:padding-box,border-box;background-origin:padding-box,border-box;background-image:linear-gradient(0deg,#1a1a1a,#1a1a1a),var(--bg-gradient)}.hero .cta-button:hover{transform:translateY(-2px);box-shadow:0 10px 36px #3b82f6cc}.features{padding:6rem 0;background:#0a0a0a}.section-title{font-size:2.5rem;font-weight:700;text-align:center;margin-bottom:1rem;color:#fff}.section-subtitle{font-size:1.125rem;text-align:center;color:#ccc;margin-bottom:4rem;max-width:600px;margin-left:auto;margin-right:auto}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(350px,1fr));gap:2rem}.feature-card{background:#1a1a1a;padding:2rem;border-radius:16px;box-shadow:0 4px 6px #0006;transition:all .3s ease;border:1px solid #2a2a2a}.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px #00000080;border-color:#3b82f6}.feature-icon{width:60px;height:60px;border-radius:12px;margin-bottom:1.5rem;color:#fff;font-size:1.5rem}.feature-icon .icon{width:30px;height:30px}.feature-card h3{font-size:1.25rem;font-weight:600;margin-bottom:1rem;color:#fff}.feature-card p{color:#ccc;line-height:1.6}.trending{padding:4rem 0;background:#000000}.video-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.video-card{background:#1a1a1a;border-radius:16px;overflow:hidden;box-shadow:0 4px 6px #0006;transition:all .3s ease;border:1px solid #2a2a2a}.video-card:hover{transform:translateY(-4px);box-shadow:0 12px 30px #00000080}.video-thumbnail{position:relative;width:100%;height:200px;background:#2a2a2a;border-radius:12px 12px 0 0;overflow:hidden;cursor:pointer}.video-thumbnail video,.video-thumbnail .video-poster{width:100%;height:100%;object-fit:cover}.video-thumbnail .video-poster{position:absolute;top:0;right:0;bottom:0;left:0;transition:opacity .4s ease}.video-thumbnail .video-poster.hide{opacity:0;pointer-events:none}.placeholder-video{height:100%;color:#888;font-size:3rem}.video-overlay{position:absolute;top:0;right:0;bottom:0;left:0;background:rgba(0,0,0,.3);opacity:0;transition:opacity .3s ease}.video-overlay i{color:#fff;font-size:3rem;background:rgba(59,130,246,.9);padding:1rem;border-radius:50%;width:80px;height:80px}.video-card:hover .video-overlay{opacity:1}.video-intro{padding:1rem .8rem;display:flex;align-items:center;justify-content:space-between}.video-intro h4{flex:1;font-size:1rem;font-weight:600;color:#fff;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.views{width:90px;flex-shrink:0;color:#ccc;font-size:.9rem;margin-left:10px}.steps{padding:4rem 0;background:#0a0a0a}.steps-container{max-width:1200px;margin:0 auto;padding:0 20px}.steps-grid{display:flex;gap:2rem;align-items:flex-start}.step{background:#1a1a1a;padding:2rem;border-radius:16px;border:1px solid #2a2a2a;text-align:center;flex:1;transition:transform .3s ease,box-shadow .3s ease}.step:hover{transform:translateY(-5px);box-shadow:0 20px 40px #0000004d}.step-number{width:60px;height:60px;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;margin:0 auto 1.5rem}.step h3{font-size:1.25rem;margin-bottom:1rem;color:#fff}.step p{color:#ccc;line-height:1.6}.faq{padding:6rem 0;background:#000000}.faq-container{max-width:900px;margin:0 auto}.faq-item{border-bottom:1px solid #2a2a2a;margin-bottom:1rem}.faq-question{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0;cursor:pointer;transition:color .3s ease;color:#fff}.faq-question:hover{color:#3b82f6}.faq-question h3{font-size:1.125rem;font-weight:600;color:inherit;margin-right:10px}.faq-question i{transition:transform .3s ease;color:#ccc}.faq-item.active .faq-question i{transform:rotate(180deg)}.faq-answer{max-height:0;overflow:hidden;transition:max-height .3s ease}.faq-item.active .faq-answer{max-height:300px}.faq-answer p{padding:0 0 20px 10px;color:#ccc;line-height:1.6}.footer-container{max-width:1000px;margin:0 auto;color:#fff;display:flex;flex-wrap:wrap;justify-content:space-between;font-size:14px;line-height:2;padding:0 0 3rem;border-top:1px solid #2a2a2a}.footer-container .item{padding-top:3rem}.footer-container .item p{opacity:.8;font-size:18px;font-weight:700;padding-bottom:8px}.footer-container .item a,.footer-container .item span{opacity:.9;color:#fff;text-decoration:none;display:block;cursor:pointer}.footer-container .item a.disabled,.footer-container .item span.disabled{cursor:default}.footer-container .item a.flex,.footer-container .item span.flex{display:flex;gap:4px}.footer-container .item svg{transform:scale(.88);transform-origin:0 center;margin-top:-10px}.footer-container .footer-logo{font-size:26px;font-weight:700;display:flex;align-items:baseline;margin:-10px 0 15px}.footer-container .footer-logo span{font-size:14px}@media (max-width: 800px){.footer-container{gap:0;flex-direction:column;align-items:center;text-align:center}.footer-container .footer-logo{justify-content:center}}@media (max-width: 768px){.nav-logo .logo-link img{width:90px}}.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;z-index:5000;background-color:#000000b3}.modal-overlay .modal-content{background:#2c2c2e;padding-bottom:55px;min-width:400px;max-width:600px;color:#fff;position:relative;text-align:center;box-shadow:0 10px 30px #0000004d;transition:all .3s ease;background:rgba(64,64,64,.5);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-radius:25px;overflow:hidden}.modal-overlay .close{position:absolute;width:26px;height:26px;top:20px;right:20px;cursor:pointer}.modal-overlay h2{font-size:26px;font-weight:600;margin:20px 0 30px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.feature-card,.video-card,.step{animation:fadeInUp .6s ease forwards}@media (max-width: 1024px){.nav-container .nav-menu{display:none}.nav-container .nav-logo .icon{display:block}}@media (min-width: 1024px){.menu-layout{display:none}}@media (max-width: 768px){.modal-header{padding:1.5rem 1.5rem 1rem}.modal-header h3{font-size:1.25rem}.modal-body{padding:1.5rem}.hero .hero-title{font-size:2.2rem}.hero .hero-subtitle{font-size:1.1rem}.section-title{font-size:2rem}.features-grid{grid-template-columns:1fr}.video-grid{grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}.steps-grid{flex-direction:column;gap:1.5rem}.footer-content{flex-direction:column;text-align:center}}@media (max-width: 480px){.nav-container{padding:0 15px}.download-app-btn{padding:0 12px}.download-app-btn span{display:none}.nav-right{gap:.6rem}.section-title{font-size:1.6rem}.language-selector{padding:.3rem}.hero .hero-title{font-size:2rem}.container{padding:0 15px}.feature-card,.step{padding:1.5rem}.video-grid{grid-template-columns:1fr}}@media (max-width: 480px){.modal-overlay h2{font-size:24px}.modal-overlay .modal-content{min-width:320px}}.border-linear{border:2px solid transparent;background-clip:padding-box,border-box;background-origin:padding-box,border-box;background-image:linear-gradient(0deg,#1a1a1a,#1a1a1a),linear-gradient(135deg,#f00,#00f,#48aae4)}.left-panel{width:400px;background:var(--bg-secondary);display:flex;flex-direction:column;overflow-y:auto;height:100%;margin:0;padding:0 0 100px;flex-shrink:0;position:relative;border-radius:20px}.image-text-to-video{flex:1;display:flex;height:calc(100vh - 64px);background:var(--bg-primary);overflow-y:scroll;padding:10px;position:relative;transition:margin-left .3s ease,width .3s ease}.edit-cont{margin:0;padding:15px;background:var(--bg-secondary);border-bottom:1px solid var(--border-color)}.edit-cont.reference .upload-area{gap:7px}.edit-cont.reference .upload-item{height:120px;transform:scale(.9)}.edit-cont.reference .upload-icon{transform:scale(.82);margin-bottom:6px}.edit-cont.reference .upload-text{transform:scale(.85)}.edit-cont .edit-header{display:flex;justify-content:space-between;align-items:center;color:var(--text-primary);font-size:18px;font-weight:600}.edit-cont .edit-header.sub{font-size:14px;margin:20px 0 10px}.edit-cont .edit-header.sub span{opacity:.6;font-size:12px;font-weight:400}.edit-cont .auto-audio{display:flex;align-items:center;color:var(--text-primary);font-size:14px;font-weight:600;margin:20px 0 10px}.edit-cont .auto-audio .audio-select{width:40px;padding:2px;margin-left:12px;border-radius:30px;cursor:pointer;display:flex;transition:all .3s linear;border:1px solid var(--border-color);background:rgba(255,255,255,.25)}.edit-cont .auto-audio .audio-select span{width:16px;height:16px;display:block;border-radius:20px;background:#fff}.edit-cont .auto-audio .audio-select.selected{justify-content:flex-end;background:var(--bg-gradient)}.edit-cont .ratio-options{display:flex;gap:8px}.edit-cont .ratio-options.multiple{gap:4px}.edit-cont .ratio-options.multiple .item{flex:1;width:auto}.edit-cont .ratio-options .item{width:66px;padding:8px 0 4px;border-radius:6px;text-align:center;gap:8px;font-size:14px;cursor:pointer;flex-direction:column;background:var(--bg-primary);border:1px solid var(--border-color)}.edit-cont .ratio-options .item.scale{padding:10px 0;font-size:12px}.edit-cont .ratio-options .item:hover{background:var(--bg-card)}.edit-cont .ratio-options .item:hover .rect div{background:#c4c3c3}.edit-cont .ratio-options .item.active{background:var(--primary-color)}.edit-cont .ratio-options .item.active .rect div{background:#d4d4d4}.edit-cont .ratio-options .item.active .scale-num{color:#fff;border-color:#fff}.edit-cont .ratio-options .scale-num{display:table;margin:0 auto 5px;color:#777;padding:0 6px;border-radius:5px;transform:scale(.85);text-transform:lowercase;border:1px solid #777}.edit-cont .ratio-options .rect{height:32px}.edit-cont .ratio-options .rect div{border-radius:4px;background:var(--border-color)}.edit-cont .ratio-options .rect-16-9{width:32px;height:18px}.edit-cont .ratio-options .rect-4-3{width:32px;height:24px}.edit-cont .ratio-options .rect-1-1{width:32px;height:32px}.edit-cont .ratio-options .rect-3-4{width:24px;height:32px}.edit-cont .ratio-options .rect-3-2{width:32px;height:22px}.edit-cont .ratio-options .rect-2-3{width:22px;height:32px}.edit-cont .ratio-options .rect-9-16{width:18px;height:32px}.edit-cont .ratio-options .rect-4-5{width:24px;height:30px}.edit-cont .ratio-options .rect-5-4{width:30px;height:24px}.edit-cont .edit-tips{font-size:12px;margin-top:10px;color:var(--text-secondary)}.edit-cont .upload-area{cursor:pointer;transition:all .3s ease;position:relative;gap:12px}.edit-cont .upload-area .add{opacity:.8;font-size:24px}.edit-cont 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