/* smart-video.css */
:root{font-family:Inter,"Microsoft YaHei",sans-serif;color:#10212c;background:#f3f7f9}*{box-sizing:border-box}body{margin:0}header{height:72px;background:#071017;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 max(24px,4vw)}a{color:inherit;text-decoration:none}.brand{display:flex;gap:11px;align-items:center}.brand b{display:grid;place-items:center;width:36px;height:36px;border-radius:12px;background:#31e4dd;color:#071017;font-size:22px}.brand span{font-weight:800;font-size:20px}.brand small{display:block;font-size:9px;letter-spacing:2px;color:#84a0af}nav{display:flex;gap:24px;color:#c8d5dc;font-size:14px}main{max-width:1480px;margin:auto;padding:32px}.hero{background:linear-gradient(125deg,#07141d,#123844);color:#fff;border-radius:28px;padding:42px;display:flex;justify-content:space-between;align-items:end;gap:30px}.eyebrow,.title span{color:#17cfc8;font-size:11px;letter-spacing:2px;font-weight:800}.hero h1{font-size:38px;margin:10px 0}.hero p{max-width:760px;color:#c9d9df;line-height:1.8}.flow{display:grid;grid-template-columns:auto auto;gap:10px 12px;white-space:nowrap}.flow i{font-style:normal;background:#2ee3dc;color:#071017;border-radius:50%;width:24px;height:24px;display:grid;place-items:center;font-weight:800}.layout{display:grid;grid-template-columns:minmax(0,1.45fr) minmax(320px,.75fr);gap:22px;margin-top:22px}.card{background:#fff;border:1px solid #dce7ec;border-radius:24px;padding:28px;box-shadow:0 18px 55px #1b455812}.title{display:flex;justify-content:space-between;align-items:start;margin-bottom:24px}.title h2{margin:5px 0;font-size:25px}.title em{font-style:normal;background:#071017;color:#47ede6;padding:9px 13px;border-radius:18px;font-weight:800}label{display:flex;flex-direction:column;gap:8px;font-weight:700;font-size:14px}textarea,select,input{border:1px solid #cfdee4;border-radius:12px;padding:13px;background:#fbfdfe;font:inherit}textarea{min-height:190px;resize:vertical;line-height:1.6}label small{align-self:end;color:#8297a2;font-weight:400}.grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:14px;margin:20px 0}.upload{border:1px dashed #27cbc4;background:#f0fffd;padding:20px;border-radius:16px;cursor:pointer}.upload input{padding:0;border:0}.upload span{font-size:12px;color:#667e89;font-weight:400}.files{font-size:13px;color:#52707d;margin:10px 0}.submit{border-top:1px solid #e2eaee;margin-top:22px;padding-top:22px;display:flex;justify-content:space-between;align-items:center}.submit div{display:grid;gap:2px}.submit strong{font-size:22px}.submit span{font-size:12px;color:#78909b}.submit button,.ghost{border:0;border-radius:12px;padding:14px 22px;font-weight:800;cursor:pointer}.submit button{background:#28ddd5;color:#06161b}.submit button:disabled{opacity:.5}.ghost{padding:9px 13px}.error{color:#d33b4c;margin-top:12px}.tasks{display:grid;gap:12px}.task{border:1px solid #e0e9ed;border-radius:14px;padding:14px}.task strong,.task span{display:block}.task strong{margin:6px 0;font-size:14px}.task span{font-size:12px;color:#667f8b}.task b{color:#00a69e;font-size:12px}#toast{position:fixed;right:22px;bottom:22px;background:#071017;color:#fff;padding:14px 18px;border-radius:12px;opacity:0;transition:.2s}#toast.show{opacity:1}@media(max-width:900px){main{padding:16px}.hero{padding:26px;display:block}.hero h1{font-size:29px}.flow{margin-top:20px}.layout{grid-template-columns:1fr}.grid{grid-template-columns:1fr 1fr}.submit{align-items:end;gap:15px}}
.task video{display:block;width:100%;margin-top:12px;border-radius:12px;background:#07131c;aspect-ratio:9/16;max-height:420px}.task .play{display:inline-flex;margin-top:10px;color:#008f91;font-weight:700;text-decoration:none}.task small.error{display:block;margin-top:8px;color:#df3449;line-height:1.5}
.submit em{display:block;margin-top:4px;color:#008f91;font-style:normal;font-weight:700}.submit em.low{color:#df3449}.error a{color:#008f91;font-weight:800}
.layout>*{min-width:0}.layout>aside.card{align-self:start;position:sticky;top:18px;max-height:calc(100vh - 36px);overflow:auto}.task{min-width:0;overflow:hidden}.task strong{overflow-wrap:anywhere;line-height:1.45}.task video{width:auto;max-width:100%;height:min(46vh,420px);aspect-ratio:auto;object-fit:contain;margin:12px auto 0}.tasks{min-width:0}@media(max-width:1100px){.layout{grid-template-columns:minmax(0,1.2fr) minmax(340px,.8fr)}.card{padding:22px}.grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}@media(max-width:900px){.layout>aside.card{position:static;max-height:none;overflow:visible}.task video{height:min(68vh,520px)}nav{gap:12px}}@media(max-width:620px){header{height:auto;min-height:64px;padding:12px 16px}.brand span{font-size:17px}main{padding:10px}.hero{border-radius:18px;padding:20px}.card{border-radius:18px;padding:16px}.grid{grid-template-columns:1fr}.submit{align-items:stretch}.submit button{min-height:48px}.title h2{font-size:22px}}

/* smart-video-v3.css */
:root{--ink:#07151d;--muted:#6c818c;--aqua:#36e2da;--line:#dbe7eb;--coral:#ff7c64}body{background:radial-gradient(circle at 12% 4%,#e7fffb 0,transparent 24%),#f4f7f8;color:var(--ink)}header{position:sticky;top:0;z-index:20;height:68px;background:#071118ef;backdrop-filter:blur(18px);border-bottom:1px solid #ffffff14}main{max-width:1540px;padding:28px 32px 48px}.hero{position:relative;min-height:410px;align-items:center;overflow:hidden;padding:50px 56px;background:radial-gradient(circle at 78% 12%,#24626d 0,transparent 35%),linear-gradient(125deg,#07131b 0%,#0c2732 60%,#0b1820 100%);box-shadow:0 30px 90px #07233225}.hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(#ffffff08 1px,transparent 1px),linear-gradient(90deg,#ffffff08 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(90deg,transparent,#000 70%);pointer-events:none}.hero-copy{position:relative;z-index:2;max-width:790px}.hero h1{font-size:clamp(38px,4vw,62px);line-height:1.08;letter-spacing:-2.5px;margin:14px 0 20px}.hero p{max-width:690px;font-size:16px;line-height:1.85;margin:0}.model-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.model-pills span{display:flex;gap:9px;align-items:center;padding:9px 12px;border:1px solid #ffffff1c;border-radius:999px;background:#ffffff0b;font-size:12px;font-weight:800;color:#ecffff}.model-pills small{color:#7fa6b1;font-weight:500}.hero-art{position:relative;width:390px;height:300px;flex:0 0 390px}.art-glow{position:absolute;width:260px;height:260px;border-radius:50%;background:#31ded548;filter:blur(55px);right:20px;top:10px}.art-card{position:absolute;border:1px solid #ffffff25;background:linear-gradient(145deg,#ffffff1d,#ffffff09);box-shadow:0 24px 60px #0007;backdrop-filter:blur(18px)}.art-main{width:190px;height:270px;right:90px;top:4px;border-radius:24px;padding:18px;transform:rotate(3deg)}.art-main>span{font-size:8px;letter-spacing:1.5px;color:#77eee8}.art-main>strong,.art-main>small{display:block}.art-main>strong{margin-top:14px;color:#fff;font-size:18px}.art-main>small{margin-top:4px;color:#8caab5;font-size:9px;letter-spacing:1px}.art-person{height:175px;border-radius:14px;margin-top:13px;background:radial-gradient(circle at 50% 26%,#ffc8a8 0 12%,transparent 13%),linear-gradient(155deg,transparent 36%,#ff826a 37% 56%,#123d47 57%);position:relative;overflow:hidden}.art-person:after{content:"";position:absolute;inset:auto 13px 14px;height:28px;border-radius:9px;background:#f4f0e8;box-shadow:0 0 0 5px #132831}.art-person i{position:absolute;width:34px;height:46px;border-radius:48%;background:#452920;left:61px;top:20px}.art-person b{position:absolute;width:70px;height:90px;border-radius:35px 35px 12px 12px;background:#ff8068;left:43px;top:68px}.art-side{right:0;top:55px;width:125px;border-radius:18px;padding:18px;display:grid;grid-template-columns:28px 1fr;gap:16px 8px;transform:rotate(-4deg)}.art-side b{display:grid;place-items:center;width:26px;height:26px;border-radius:8px;background:#42e5de;color:#06161a;font-size:10px}.art-side span{align-self:center;color:#dff8fa;font-size:11px}.art-status{position:absolute;left:12px;bottom:6px;color:#e7ffff;background:#08151ed9;border:1px solid #ffffff1f;border-radius:99px;padding:11px 15px;font-size:11px;box-shadow:0 14px 35px #0008}.art-status i{display:inline-block;width:7px;height:7px;border-radius:50%;background:#32e0d8;box-shadow:0 0 0 5px #32e0d824;margin-right:8px}.workflow{display:flex;align-items:center;justify-content:space-between;margin:18px 0 0;padding:19px 24px;border:1px solid var(--line);border-radius:18px;background:#fff;box-shadow:0 12px 34px #1637460d}.workflow>div{display:flex;align-items:center;gap:12px}.workflow>div>b{font-size:11px;color:#00a9a3;border:1px solid #b7eeea;border-radius:8px;padding:7px}.workflow span,.workflow strong,.workflow small{display:block}.workflow strong{font-size:13px}.workflow small{margin-top:3px;color:#8a9ba3}.workflow>i{width:42px;height:1px;background:linear-gradient(90deg,#bcd5db,#3dded7);position:relative}.workflow>i:after{content:"";position:absolute;right:0;top:-3px;width:7px;height:7px;border-top:1px solid #38cfc8;border-right:1px solid #38cfc8;transform:rotate(45deg)}.layout{grid-template-columns:minmax(0,1.3fr) minmax(360px,.7fr);gap:18px;margin-top:18px}.card{border-radius:22px;box-shadow:0 20px 60px #15384710}.creator-card{padding:32px}.title h2{font-size:28px;letter-spacing:-.6px}.title p{margin:4px 0 0;color:var(--muted);font-size:13px}.title em{border:1px solid #153944;background:#091820;color:#4aede5}.spoken{margin-top:16px;display:flex;flex-direction:row;justify-content:space-between;align-items:center;padding:15px 17px}.spoken span{display:flex;align-items:center;gap:8px;color:var(--ink)}.spoken input{accent-color:#13bdb6}.asset-upload{text-align:center;align-items:center;padding:25px;position:relative}.asset-upload input{position:absolute;width:1px;height:1px;opacity:0}.upload-icon{display:grid!important;place-items:center;width:40px;height:40px;border-radius:12px;background:#071820!important;color:#55eee7!important;font-size:26px!important}.asset-upload strong{font-size:15px}.submit button{display:flex;align-items:center;gap:18px;min-width:174px;justify-content:center;transition:transform .18s,box-shadow .18s}.submit button:hover{transform:translateY(-2px);box-shadow:0 12px 28px #25cfc840}.submit button b{font-size:18px}.task-card{padding:26px}.empty-state{color:#8a9ba3;text-align:center;padding:44px 10px;border:1px dashed #d5e3e8;border-radius:15px}.task{background:#fbfdfd}.task b{letter-spacing:.4px}
@media(max-width:1080px){.hero{padding:38px}.hero-art{width:320px;flex-basis:320px}.workflow{overflow:auto;gap:18px}.workflow>i{min-width:26px}.layout{grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr)}.grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
@media(max-width:900px){.hero{display:block}.hero-art{margin:28px auto 0}.workflow{justify-content:flex-start}.layout{grid-template-columns:1fr}.spoken{align-items:flex-start;flex-direction:column}}
@media(max-width:620px){main{padding:10px 10px 28px}.hero{padding:25px 20px;min-height:0}.hero h1{font-size:34px;letter-spacing:-1.4px}.hero-art{width:280px;height:275px;transform:scale(.88);transform-origin:left top;margin-bottom:-30px}.workflow{padding:15px}.workflow>div{min-width:150px}.creator-card,.task-card{padding:17px}.model-pills span{font-size:10px}.title em{font-size:11px}}
.generated-art{width:500px;height:315px;flex-basis:500px}.hero-generated{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:25px;border:1px solid #ffffff26;box-shadow:0 30px 75px #0009}.generated-art:after{content:"";position:absolute;inset:0;border-radius:25px;background:linear-gradient(90deg,#07151c75 0,transparent 45%,#07151c12);pointer-events:none}.scene-strip{position:absolute;right:-18px;bottom:-20px;display:flex;gap:10px;z-index:3}.scene-strip img{width:76px;height:112px;object-fit:cover;border-radius:14px;border:3px solid #102630;box-shadow:0 18px 40px #0009}.generated-art .art-status{z-index:4;left:18px;bottom:16px}.generated-art .art-glow{z-index:0}.task video{will-change:auto}.tasks{contain:layout style}
@media(max-width:1180px){.generated-art{width:400px;flex-basis:400px;height:280px}}
@media(max-width:900px){.generated-art{width:min(100%,560px);height:310px;transform:none;margin-bottom:12px}.scene-strip{right:10px}}
@media(max-width:620px){.generated-art{width:100%;height:230px;transform:none;margin:24px 0 6px}.scene-strip img{width:58px;height:86px}.generated-art .art-status{font-size:10px}}

/* smart-video-v4.css */
:root{--ink:#0b1720;--muted:#687983;--brand:#18cfc8;--brand-dark:#087f7b;--line:#dce5e8;--surface:#fff;--bg:#f4f7f8;--radius:8px;--shadow:0 18px 50px rgba(24,50,61,.08)}
body{background:var(--bg);color:var(--ink)}
header{position:sticky;top:0;z-index:30;height:68px;background:rgba(7,17,24,.97);border-bottom:1px solid rgba(255,255,255,.08)}
main{max-width:1480px;padding:24px 30px 52px}
.hero{position:relative;display:block;min-height:430px;padding:58px 56px;overflow:hidden;border-radius:var(--radius);background:#07131c;box-shadow:0 24px 70px rgba(7,35,45,.18)}
.hero-media,.hero-media img{position:absolute;inset:0;width:100%;height:100%}.hero-media img{object-fit:cover;object-position:center}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,16,24,.98) 0%,rgba(5,16,24,.91) 34%,rgba(5,16,24,.25) 64%,rgba(5,16,24,.05) 100%)}
.hero-copy{position:relative;z-index:2;max-width:720px}.hero h1{max-width:680px;margin:14px 0 18px;font-size:clamp(38px,4.2vw,60px);line-height:1.08;letter-spacing:-1px}.hero p{max-width:620px;margin:0;color:#cad7dc;font-size:16px;line-height:1.75}
.model-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}.model-pills span{display:flex;align-items:center;gap:9px;padding:9px 12px;border:1px solid rgba(255,255,255,.16);border-radius:999px;background:rgba(7,22,30,.68);color:#f3ffff;font-size:12px;font-weight:800}.model-pills small{color:#9eb1b9;font-weight:500}
.workflow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr auto 1fr;align-items:center;gap:18px;margin:18px 0 0;padding:18px 22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.workflow>div{display:flex;align-items:center;gap:12px;min-width:0}.workflow>div>b{display:grid;place-items:center;width:30px;height:30px;border:1px solid #aee8e5;border-radius:7px;color:#078d88;font-size:11px}.workflow span,.workflow strong,.workflow small{display:block}.workflow strong{font-size:13px}.workflow small{margin-top:3px;color:#7c8d95;font-weight:400}.workflow>i{width:36px;height:1px;background:#b8d5d4}
.layout{grid-template-columns:minmax(0,1.45fr) minmax(360px,.55fr);gap:18px;margin-top:18px;align-items:start}.card{border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow)}.creator-card{padding:30px}.task-card{padding:26px;position:static!important;max-height:none!important;overflow:visible!important}.title{margin-bottom:18px}.title h2{font-size:28px;letter-spacing:-.3px}.title em{border-radius:999px;background:#0a1a23;color:#47e8e1;font-size:12px}
.model-lock{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 0 20px;padding:12px;border:1px solid #d9e9e9;border-radius:var(--radius);background:#f5fbfb}.model-lock span{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 10px;color:var(--muted);font-size:12px}.model-lock span+span{border-left:1px solid #d9e5e8}.model-lock b{color:var(--ink);font-size:13px}
textarea,select,input{border-radius:var(--radius);background:#fbfcfd}textarea:focus,select:focus,input:focus{outline:3px solid rgba(24,207,200,.18);border-color:#20bdb6}.grid{grid-template-columns:1.6fr 1fr 1fr 1fr}.spoken,.asset-upload{border-radius:var(--radius)}.asset-upload{padding:22px}.upload-icon{display:grid!important;place-items:center;width:38px;height:38px;border-radius:var(--radius);background:#0b1b24!important;color:#55eee7!important;font-size:24px!important}
.submit{min-height:96px}.submit button,.ghost{min-height:44px;border-radius:var(--radius)}.submit button{transition:transform .16s ease,box-shadow .16s ease}.submit button:hover{transform:translateY(-1px);box-shadow:0 10px 24px rgba(24,207,200,.24)}.tasks{max-height:none!important;overflow:visible!important;contain:layout style}.task{border-radius:var(--radius);background:#fbfcfd}.task video{will-change:auto;max-height:520px}.empty-state{padding:38px 14px;border:1px dashed #cedcdf;border-radius:var(--radius);color:#7d8d95;text-align:center}
@media(max-width:1100px){main{padding:20px}.hero{min-height:390px;padding:44px 38px}.hero-copy{max-width:580px}.workflow{gap:10px}.layout{grid-template-columns:minmax(0,1.15fr) minmax(330px,.85fr)}.grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
@media(max-width:900px){.hero{min-height:430px}.hero-shade{background:linear-gradient(90deg,rgba(5,16,24,.97),rgba(5,16,24,.72) 62%,rgba(5,16,24,.2))}.workflow{grid-template-columns:1fr 1fr}.workflow>i{display:none}.layout{grid-template-columns:1fr}.spoken{align-items:flex-start;flex-direction:column}}
@media(max-width:620px){header{min-height:64px;padding:12px 16px}nav{gap:12px;font-size:12px}main{padding:10px}.hero{min-height:470px;padding:28px 20px}.hero-media img{object-position:68% center}.hero-shade{background:linear-gradient(180deg,rgba(5,16,24,.94) 0%,rgba(5,16,24,.75) 58%,rgba(5,16,24,.25) 100%)}.hero h1{font-size:34px;letter-spacing:-.5px}.hero p{font-size:14px}.workflow{grid-template-columns:1fr;padding:14px}.creator-card,.task-card{padding:17px}.model-lock{grid-template-columns:1fr}.model-lock span{min-height:32px}.model-lock span+span{border-left:0;border-top:1px solid #d9e5e8}.grid{grid-template-columns:1fr}.submit{align-items:stretch}.submit button{min-height:50px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
.login-state{display:grid;gap:10px;align-content:center;justify-items:start;min-height:160px;padding:20px;border:1px solid #d9e5e8;border-radius:8px;background:#f8fbfc;color:#52646c}.login-state span{font-size:12px;font-weight:800;letter-spacing:.08em;color:#e14d58}.login-state strong{font-size:15px;color:#10232c}.login-state a{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 18px;border-radius:8px;background:#0bd3cf;color:#06272b;font-weight:800;text-decoration:none}.login-state a:hover{filter:brightness(.96)}