:root{color-scheme:dark;--bg:#101716;--panel:#151c1a;--ink:#eeeadd;--muted:#9aaba0;--line:#e1e8d215;--accent:#f48670;--soft:#d7dfc1;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink)}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{font:inherit;cursor:pointer}button:disabled{cursor:not-allowed;opacity:.4}button:focus-visible,a:focus-visible,textarea:focus-visible,canvas:focus-visible,.import-label:focus-within{outline:2px solid var(--accent);outline-offset:4px}button{color:inherit}a{color:inherit;text-decoration:none}[hidden]{display:none!important}.topbar{height:86px;display:flex;align-items:center;padding:0 38px;border-bottom:1px solid var(--line);gap:48px}.brand{display:flex;gap:11px;align-items:center;font-size:20px;letter-spacing:3px}.brand-mark{font-size:32px;color:var(--accent);letter-spacing:0;transform:rotate(-12deg)}.brand small{display:block;font:8px/1.6 sans-serif;letter-spacing:2.2px;color:var(--muted);margin-top:3px}.topbar nav{display:flex;gap:28px;margin-left:auto;font-size:12px;color:#bdc8bc}.topbar nav a:hover{color:var(--accent)}.lab-badge{font:9px/1 monospace;letter-spacing:1.4px;border:1px solid #778e6f3b;border-radius:30px;padding:11px 13px;color:#b9c5a5;display:flex;gap:8px;align-items:center}.lab-badge i,.scene-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:#a9bd83;box-shadow:0 0 12px #a9bd8370}.studio{display:grid;grid-template-columns:368px minmax(0,1fr);min-height:calc(100dvh - 86px)}.brief-panel{padding:39px 30px 24px;border-right:1px solid var(--line);background:linear-gradient(145deg,#19211d,#131a18);overflow-y:auto;height:calc(100dvh - 86px)}.eyebrow,.section-label{font:9px/1.4 monospace;letter-spacing:2.6px;color:#b6c2a3}.eyebrow{margin-bottom:18px}h1{font-family:"Songti SC","STSong","Noto Serif CJK SC",serif;font-weight:400;font-size:36px;line-height:1.55;letter-spacing:3px;margin:0}.intro{color:var(--muted);font-size:12px;line-height:1.9;margin:15px 0 29px}form>label{font-size:12px;display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}form>label span{font:8px monospace;letter-spacing:1px;color:#819180}textarea{font:12px/1.9 inherit;font-family:inherit;font-size:12px;line-height:1.9;background:#0c1311;border:1px solid #cbdcb522;border-radius:9px;width:100%;min-height:126px;padding:13px 14px;color:var(--ink);resize:vertical;display:block}textarea::placeholder{color:#6c7c70}textarea:focus{border-color:#c1d6a961}.prompt-chips{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0 19px}.prompt-chips button{font-size:10px;padding:7px 8px;color:#c0cab6;background:transparent;border:1px solid #a8bc9626;border-radius:4px}.prompt-chips button:hover{border-color:#c6dab777;background:#bfd0b20a}.primary{display:flex;width:100%;align-items:center;justify-content:space-between;background:var(--accent);color:#211c15;border:0;border-radius:7px;padding:14px 16px;font-size:13px;font-weight:600}.primary>span:last-child{font-size:20px;line-height:1}.primary:hover{background:#ffa68f}.cancel{display:block;width:100%;background:transparent;border:0;text-align:center;margin-top:9px;color:var(--muted);font-size:12px;padding:7px}.status{font-size:11px;line-height:1.8;color:#a9b49e;min-height:38px;margin:12px 0 4px}.status.error{color:#ffb19b}.layout-info{margin:23px 0;border-top:1px solid var(--line);padding-top:22px}.layout-info h2{font-family:"Songti SC",serif;font-size:21px;font-weight:400;margin:13px 0 8px;line-height:1.5}.layout-info>p{color:#9dad9c;font-size:11px;line-height:1.9}.layout-info dl{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:16px;margin:19px 0}.layout-info dt{font-size:10px;color:#81917f;margin-bottom:7px}.layout-info dd{margin:0;font:13px/1.4 monospace;color:#d4ddc7}.export-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}.export-actions button{background:#bfceb80c;border:1px solid #aabc952b;border-radius:6px;padding:11px 5px;font-size:11px}.export-actions button:hover{border-color:#e0dfb875}.layout-info .export-note{font-size:10px;color:#7a8b78;margin-bottom:0}.secondary-actions{display:flex;gap:18px;align-items:center;margin:23px 0 16px}.secondary-actions>button,.import-label{font-size:11px;color:#c2c8b2;border:0;background:transparent;padding:0;cursor:pointer;text-decoration:underline;text-decoration-color:#b4c1a73a;text-underline-offset:5px}.import-label input{position:absolute;width:1px;height:1px;clip-path:inset(100%);overflow:hidden}.disclosure{font-size:9px;color:#738372;line-height:1.9;margin:0;max-width:292px}.viewport{position:relative;height:calc(100dvh - 86px);min-height:500px;overflow:hidden;background:radial-gradient(ellipse at 52% 43%,#2e3b32 0%,#1b2822 43%,#121d18 85%)}.viewport:after{position:absolute;content:"";pointer-events:none;inset:0;background:radial-gradient(ellipse at center,transparent 46%,#1018166b);z-index:1}canvas{display:block;width:100%;height:100%;touch-action:none;cursor:grab;position:relative;z-index:1}canvas:active{cursor:grabbing}.scene-caption{position:absolute;z-index:3;top:27px;left:29px;right:29px;display:flex;gap:8px;align-items:center;font-size:10px;color:#bdc9b2;letter-spacing:1px}.model-tag{margin-left:auto;font:8px monospace;letter-spacing:1.5px;color:#718775}.empty-state{position:absolute;z-index:2;top:50%;left:50%;width:300px;text-align:center;transform:translate(-50%,-54%);pointer-events:none}.empty-state h2{font-family:"Songti SC","STSong",serif;font-size:37px;font-weight:400;line-height:1.6;letter-spacing:5px;margin:24px 0 12px;color:#e3e4cd}.empty-state p{font-size:11px;color:#9aad95;line-height:2}.empty-state button{pointer-events:auto;border:1px solid #bbcc9952;padding:11px 17px;color:#d1d9bb;border-radius:5px;background:#b1c19708;font-size:11px;margin-top:15px}.orbit-symbol{width:100px;height:54px;position:relative;margin:auto}.orbit-symbol span{border:1px solid #aabd8557;transform:rotate(-20deg);position:absolute;inset:0;border-radius:50%}.orbit-symbol:after{content:"";position:absolute;inset:0;border:1px solid #aabd852d;transform:rotate(32deg);border-radius:50%}.orbit-symbol i{font-size:40px;color:#c8d5a9;font-style:normal;line-height:54px}.view-controls{position:absolute;z-index:3;right:24px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:7px}.view-controls button{width:35px;height:35px;background:#111d17d9;border:1px solid #adc49c29;border-radius:6px;color:#c7d5b8;font:20px/1 sans-serif;backdrop-filter:blur(5px)}.view-controls button:hover,.view-controls button[aria-pressed=true]{color:var(--accent);border-color:#f4867066}.viewport-footer{position:absolute;z-index:3;bottom:25px;left:29px;right:29px;display:flex;justify-content:space-between;color:#81977d;font-size:9px;letter-spacing:.8px;pointer-events:none}.viewport-footer b{font-weight:400;margin:0 7px}#view-scale{margin-right:55px;font-family:monospace}.compass{position:absolute;bottom:21px;right:27px;text-align:center;z-index:3;width:24px;color:#acbd95;font:9px monospace;pointer-events:none}.compass i{font-size:26px;display:block;font-style:normal;transform-origin:50% 65%}.scene-loading{position:absolute;z-index:4;inset:0;background:#0d1813c7;backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;flex-direction:column;gap:16px}.scene-loading strong{font-family:"Songti SC",serif;font-size:24px;font-weight:400;letter-spacing:3px}.scene-loading>span:last-child{font-size:11px;color:#a2b19b}.spinner{border:1px solid #b4c89333;border-top-color:#ed9d84;border-radius:50%;width:40px;height:40px;animation:spin 1.5s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:1500px){.studio{grid-template-columns:412px minmax(0,1fr)}.brief-panel{padding:44px 38px}h1{font-size:43px}.intro{font-size:13px}textarea{min-height:143px}}@media(max-width:1050px){.studio{grid-template-columns:320px minmax(0,1fr)}.brief-panel{padding:30px 23px}.topbar{padding:0 25px;height:75px;gap:25px}.brief-panel,.viewport{height:calc(100dvh - 75px)}.studio{min-height:calc(100dvh - 75px)}h1{font-size:32px}.lab-badge{display:none}.scene-caption{left:20px;right:20px}.model-tag{display:none}.empty-state h2{font-size:30px}.view-controls{right:15px}}@media(max-width:700px){.topbar{height:72px;padding:0 19px}.brand{font-size:17px;letter-spacing:2px}.brand-mark{font-size:28px}.brand small{font-size:7px;letter-spacing:1.8px}.topbar nav{gap:0}.topbar nav a{font-size:10px}.topbar nav a:last-child{display:none}.studio{display:flex;flex-direction:column;min-height:0}.viewport{order:0;height:53dvh;min-height:360px;max-height:610px;border-bottom:1px solid var(--line)}.brief-panel{order:1;height:auto;overflow:visible;border-right:0;padding:29px 24px max(30px,env(safe-area-inset-bottom))}.eyebrow{font-size:8px;margin-bottom:12px}h1{font-size:31px;line-height:1.5}h1 br{display:none}.intro{margin:8px 0 24px;font-size:12px}.desktop-break{display:none}.empty-state{transform:translate(-50%,-50%)}.empty-state h2{font-size:28px;margin:15px 0 6px;line-height:1.5}.empty-state p{font-size:10px}.orbit-symbol{transform:scale(.75);height:40px}.empty-state button{margin-top:7px}.scene-caption{top:20px;font-size:9px}.view-controls{right:14px;top:51%}.view-controls button{width:32px;height:32px}.viewport-footer{left:20px;bottom:21px;font-size:8px}.disclosure{max-width:none}.status{min-height:0}.layout-info dl{justify-content:flex-start;gap:42px}.secondary-actions{margin-top:21px}.scene-loading strong{font-size:19px}textarea{font-size:14px;min-height:123px}.prompt-chips button{font-size:11px}.primary{font-size:14px;padding:15px 16px}.layout-info{margin-top:26px}}@media(prefers-reduced-motion:reduce){.spinner{animation-duration:3s}}