:root{color-scheme:light;--ink:#111a2c;--muted:#61718b;--line:#e7ecf2;--soft:#f7f9fb;--accent:#314b3b;font-family:"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:#fff;font-synthesis:none}
*{box-sizing:border-box}body{margin:0}button,a,input{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer}button:disabled{cursor:wait}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,model-viewer:focus-visible{outline:3px solid #5478b6;outline-offset:4px}button{color:var(--ink)}[hidden]{display:none!important}.demo-bar{background:#edf2ef;color:#385042;text-align:center;font-size:12px;line-height:1.6;padding:7px 16px}.site-header{max-width:1240px;margin:auto;height:76px;padding:0 32px;display:flex;align-items:center;gap:52px;border-bottom:1px solid var(--line)}.brand{font-size:25px;font-weight:750;letter-spacing:-1.2px;display:flex;align-items:center}.brand>span{font-weight:400}.brand small{font-size:9px;letter-spacing:1.7px;margin:4px 0 0 13px;font-weight:600;color:var(--muted)}nav{display:flex;gap:30px;font-size:14px;height:100%;align-items:center}nav a{color:var(--muted);height:100%;display:flex;align-items:center;border-bottom:2px solid transparent}nav a.current{color:var(--ink);border-color:var(--ink)}.preview-label{margin-left:auto;font-size:10px;letter-spacing:1.7px;color:var(--muted)}main{max-width:1216px;margin:auto;padding:0 28px}.intro{text-align:center;padding:38px 0 28px}.eyebrow{font-size:11px;letter-spacing:2.2px;font-weight:650;color:#506254;margin:0 0 13px}h1{font-size:34px;font-weight:600;letter-spacing:-1px;margin:0 0 14px;line-height:1.3}.intro>p:last-child{font-size:14px;color:var(--muted);line-height:1.8;margin:0}.workspace{border:1px solid var(--line);border-radius:24px;padding:20px;background:#fff;box-shadow:0 12px 48px #15213304}.model-tabs{background:var(--soft);border:1px solid var(--line);padding:4px;display:grid;grid-template-columns:repeat(3,1fr);max-width:596px;margin:0 auto 18px;border-radius:14px;gap:4px}.model-tabs button{border:0;background:transparent;border-radius:10px;padding:11px 10px;display:flex;align-items:center;justify-content:center;gap:10px;min-height:44px}.model-tabs span{font-weight:600;font-size:13px}.model-tabs small{font-size:11px;color:var(--muted);white-space:nowrap}.model-tabs button[aria-pressed=true]{background:var(--ink);color:#fff}.model-tabs button[aria-pressed=true] small{color:#dbe3f1}.studio-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}.panel{border:1px solid var(--line);border-radius:16px;min-width:0;padding:24px;box-shadow:0 6px 10px #111a2c05}.panel-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}h2{font-size:16px;margin:0;font-weight:600}.panel-heading>span{font-size:10px;letter-spacing:1px;color:var(--muted)}.panel-heading .historical-badge{letter-spacing:0;background:#eef3ef;color:#405547;border-radius:5px;padding:4px 8px}.dropzone{display:block;position:relative;width:100%;height:222px;border:1px dashed #cad4e1;border-radius:12px;background:#fafbfd;overflow:hidden;padding:8px}.dropzone img{width:100%;height:100%;object-fit:contain}.dropzone:hover,.dropzone.dragging{border-color:#617b67;background:#f1f5f2}.replace-label{position:absolute;bottom:9px;left:50%;transform:translateX(-50%);white-space:nowrap;font-size:11px;background:#fffffff2;padding:6px 13px;border:1px solid var(--line);border-radius:20px;color:#50617b}.input-caption{display:flex;justify-content:space-between;gap:8px;font-size:10px;line-height:1.6;color:var(--muted);margin-top:8px}.input-caption>span:first-child{max-width:50%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sample-heading{font-size:11px;color:var(--muted);margin:17px 0 8px}.samples{display:flex;gap:9px}.samples button{background:#fff;border:1px solid var(--line);border-radius:8px;display:flex;align-items:center;gap:7px;padding:4px 9px 4px 4px;min-height:46px;font-size:11px}.samples button img{width:35px;height:35px;object-fit:contain;border-radius:4px}.samples button[aria-pressed=true]{border-color:#667f6d;background:#f4f7f4;box-shadow:0 0 0 1px #667f6d}.configuration{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:19px 0 15px;padding:13px 14px;border:1px solid var(--line);border-radius:9px}.configuration small{font-size:10px;color:var(--muted);display:block;margin-bottom:5px}.configuration strong{font-size:12px;font-weight:500}.configuration>span{font-size:10px;padding:4px 7px;background:var(--soft);border-radius:4px;white-space:nowrap}.primary{min-height:46px;padding:11px 18px;border:1px solid var(--ink);background:var(--ink);color:#fff;border-radius:9px;font-size:13px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:14px;width:100%}.primary:hover{background:#26344d}.primary>span{font-size:11px;font-weight:400;color:#dbe3f1;border-left:1px solid #ffffff3d;padding-left:14px}.privacy{font-size:10px;line-height:1.6;text-align:center;color:var(--muted);margin:9px 0 0}.output-panel{display:flex;flex-direction:column}.viewer-stage{position:relative;min-height:350px;flex:1;background:#f6f7f9;border:1px solid #edf0f4;border-radius:12px;overflow:hidden}.viewer-stage model-viewer{display:block;position:absolute;inset:0;width:100%;height:100%;--progress-bar-color:#607966;--progress-bar-height:3px}.viewer-message{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;padding:24px;pointer-events:none}.viewer-message strong{font-size:15px;font-weight:500;color:#5e6f87}.viewer-message p{font-size:12px;color:var(--muted);line-height:1.8;max-width:280px}.loading-mark{width:26px;height:26px;border:2px solid #d3ddd6;border-top-color:#55725d;border-radius:50%;margin-bottom:18px;animation:spin 1s linear infinite}.viewer-tools{position:absolute;right:12px;bottom:12px;display:flex;gap:6px}.viewer-tools button{background:#fffffff2;border:1px solid #dbe1e9;border-radius:6px;padding:8px 10px;font-size:10px;min-height:34px}.viewer-tools button[aria-pressed=true]{background:var(--ink);color:#fff}.result-meta{display:flex;justify-content:space-between;align-items:center;gap:12px;padding-top:19px}.result-meta strong{font-size:12px;font-weight:600}.result-meta p{font-size:11px;color:var(--muted);margin:6px 0 0}.secondary{background:#fff;border:1px solid #d8e0e9;color:var(--ink);border-radius:8px;padding:10px 13px;display:inline-flex;align-items:center;justify-content:center;font-size:11px;min-height:38px;white-space:nowrap}.secondary:hover{background:var(--soft)}.viewer-help{font-size:10px;color:var(--muted);margin:15px 0 0}.under-workspace{display:flex;justify-content:space-between;padding:20px 4px 36px;font-size:12px;color:var(--muted)}.under-workspace a{color:var(--ink)}footer{max-width:1160px;padding:22px 0;margin:auto;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;font-size:10px;color:var(--muted)}footer>span:last-child{font-size:9px;letter-spacing:1.5px}.model-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin:18px 0}.model-cards article{padding:32px 26px;border:1px solid var(--line);border-radius:16px}.model-cards article.featured{border:1.5px solid var(--ink)}.card-kicker{font-size:10px;letter-spacing:1.5px;color:var(--muted)}.model-cards h2{font-size:23px;margin:25px 0 14px}.model-cards p{font-size:13px;line-height:1.8;color:var(--muted);min-height:55px}.card-price{font-size:36px;letter-spacing:-1px;margin:30px 0 24px}.card-price small{font-size:12px;letter-spacing:0;color:var(--muted)}.model-cards button{width:100%;min-height:46px}.collection-note{text-align:center;color:var(--muted);font-size:12px;line-height:1.8;margin:28px 0 72px}dialog{border:1px solid var(--line);border-radius:18px;padding:32px;max-width:440px;width:calc(100% - 32px);color:var(--ink);box-shadow:0 20px 80px #0003}dialog::backdrop{background:#10182766}dialog h2{font-size:21px;line-height:1.5;padding-right:10px}dialog p:not(.eyebrow){font-size:13px;line-height:1.9;color:var(--muted)}dialog .primary{margin-top:24px}.dialog-close{position:absolute;top:8px;right:8px;border:0;background:transparent;font-size:24px;width:40px;height:40px}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:13px;padding:12px 20px;border-radius:9px;z-index:5;max-width:calc(100% - 30px);box-shadow:0 8px 30px #0002}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
.model-tabs span{font-size:14px}.model-tabs small,.sample-heading,.replace-label,.samples button{font-size:12px}.configuration strong,.result-meta strong{font-size:13px}.primary{font-size:14px}.primary>span,.secondary,.result-meta p{font-size:12px}.privacy,.viewer-help,.input-caption{font-size:11px}
@media(max-width:1000px){.panel{padding:18px}.studio-grid{gap:16px}.samples{gap:6px}.samples button{padding-right:6px;gap:4px}.samples button img{width:29px;height:29px}.input-caption{flex-direction:column;gap:1px}.input-caption>span:first-child{max-width:100%}.configuration{padding:12px 10px}.result-meta{flex-wrap:wrap}footer{margin:0 32px}}
@media(max-width:720px){.demo-bar{font-size:10px}.site-header{height:66px;padding:0 20px;gap:24px}.brand{font-size:23px}.brand small,.preview-label{display:none}nav{gap:18px;margin-left:auto;font-size:12px}main{padding:0 14px}.intro{padding:30px 12px 24px}.eyebrow{font-size:9px;letter-spacing:1.5px}h1{font-size:26px;letter-spacing:-.7px}.intro>p:last-child{font-size:12px;line-height:1.9}.workspace{padding:10px;border-radius:18px}.model-tabs{gap:2px;margin-bottom:12px;padding:3px;border-radius:11px}.model-tabs button{padding:9px 3px;flex-direction:column;gap:4px}.model-tabs span{font-size:11px}.model-tabs small{font-size:10px}.studio-grid{grid-template-columns:1fr;gap:12px}.panel{padding:16px;border-radius:12px}.dropzone{height:220px}.input-caption{flex-direction:row;flex-wrap:wrap;font-size:9px}.samples{gap:8px}.samples button{flex:1;font-size:10px;padding:4px;justify-content:center}.configuration strong{font-size:11px}.viewer-stage{height:365px;min-height:365px;flex:auto}.result-meta{flex-wrap:nowrap}.result-meta strong{font-size:11px}.secondary{font-size:10px;padding:9px 10px}.under-workspace{font-size:10px;padding:18px 3px 28px}.model-cards{grid-template-columns:1fr;gap:14px;margin-top:0}.model-cards article{padding:24px}.model-cards p{min-height:0}.model-cards h2{margin-top:17px}.card-price{margin:20px 0}.collection-note{margin-bottom:35px}footer{margin:0 20px;font-size:9px;padding:18px 0}footer>span:last-child{display:none}}
/* Local mock-flow controls reuse the existing light studio palette. */
.local-flow-controls{display:grid;gap:10px;margin:14px 0;color:#26352e;font-size:13px}
.local-flow-controls label{display:flex;align-items:center;justify-content:space-between;gap:12px}
.local-flow-controls select{min-width:0;max-width:70%;padding:8px;border:1px solid #bbc8c0;border-radius:8px;background:#fff;color:#26352e}
.local-flow-controls p{line-height:1.6;margin:0;padding:10px;background:#edf2ef;border-radius:8px;color:#385042}
#subscription-note{font-size:12px;color:#385042;margin:0 0 12px;line-height:1.7;text-align:left}
dialog{background:#fff}
dialog p:not(.eyebrow){color:#465267}
.premium-choice{max-width:596px;margin:0 auto 20px;display:flex;align-items:center;gap:12px;font-size:13px;color:#26352e}
.premium-choice select{min-width:0;flex:1;max-width:100%;border:1px solid #bbc8c0;border-radius:9px;padding:12px;background:#fff;color:#26352e;font:inherit}
#preview-upgrade{width:100%;margin-bottom:12px;white-space:normal}
.offer-plan{border:1px solid #d8e0e9;border-radius:10px;padding:14px;margin:10px 0;background:#f7f9fb;color:#111a2c}
.offer-plan strong{font-size:16px}.offer-plan p{margin:5px 0 0}dialog .offer-label{font-size:11px}
@media(max-width:720px){.premium-choice{flex-direction:column;align-items:stretch;gap:8px;padding:0 6px}.premium-choice select{font-size:12px;width:100%}dialog{padding:24px;max-height:calc(100dvh - 24px);overflow:auto}.offer-plan{padding:12px}}
/* Production states on the existing light studio. */
:root{--muted:#526078}.site-header{gap:24px}.site-header #language{margin-left:auto}.site-header #navAuthBtn{font-size:13px;white-space:nowrap}.notice{margin:0 0 20px;padding:14px 18px;border-radius:10px;background:#edf2ef;color:#304c3a;font-size:14px;line-height:1.6}.notice.error{background:#fff0ef;color:#962e27;margin:16px 0 0}.account-state{font-size:13px;color:#344355}.plans{display:block;text-align:center;margin-bottom:12px}.primary{color:#fff!important}.primary:disabled{background:#46564c;color:#fff!important;cursor:not-allowed;opacity:1}.dropzone{color:#45536a}.dropzone #upload-prompt{display:block;padding:30px;font-size:14px;line-height:1.7}.task-history{margin:32px 0}.task-row{display:block;text-align:left;width:100%;padding:14px;margin:8px 0;background:#f7f9fb;border:1px solid #dbe2eb;border-radius:8px;color:#26354a;font-size:13px;line-height:1.6;overflow-wrap:anywhere}.faq-section{margin:36px 0}.faq-section h2{margin-bottom:18px}.faq-section details{padding:16px 0;border-bottom:1px solid #dbe2eb}.faq-section summary{cursor:pointer;font-weight:600}.faq-section p{color:#46556a;font-size:14px;line-height:1.8;max-width:800px}.viewer-message{color:#46556a}.privacy{color:#526078!important}.input-caption{overflow-wrap:anywhere}#filename{max-width:100%;word-break:break-word}#refresh{margin-top:12px}.premium-choice select:disabled{opacity:1;color:#344355}#generate{white-space:normal;line-height:1.5;min-height:48px}#tasks{color:#46556a;font-size:14px}@media(max-width:720px){.site-header{height:auto;min-height:66px;flex-wrap:wrap;padding:14px;gap:14px}.site-header nav{order:3;width:100%;margin:0;justify-content:center;height:35px}.site-header nav a{font-size:13px}.site-header #language{margin-left:auto}.intro h1{font-size:28px}.notice{font-size:13px}.panel-heading>span{overflow-wrap:anywhere}.task-history .panel-heading{align-items:flex-start}.viewer-stage{height:330px;min-height:330px}}