:root{--paper:#f6f3ee;--card:#fff;--ink:#22202a;--muted:#6f6a7d;--line:#e4dfd6;--accent:#6f4ff2;--accent-soft:#efeaff;--warn:#b3521f;--warn-soft:#fdf0e6;--radius:14px;--tap:44px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--paper);color:var(--ink);margin:0;font-family:ui-sans-serif,system-ui,-apple-system,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;font-size:15px;line-height:1.55}button,input,select{font:inherit;color:inherit}button{cursor:pointer;background:0 0;border:none}h1,h2,h3{letter-spacing:-.01em;margin:0;font-weight:700}.app{flex-direction:column;gap:16px;max-width:1240px;margin:0 auto;padding:0 16px 40px;display:flex}.topbar{justify-content:space-between;align-items:center;gap:12px;padding:12px 0;display:flex}.brand{align-items:center;gap:9px;display:flex}.brand-mark{background:var(--accent);color:#fff;border-radius:10px;place-items:center;width:32px;height:32px;font-weight:700;display:grid}.brand-text{flex-direction:column;font-weight:700;line-height:1.15;display:flex}.brand-text i{letter-spacing:.16em;color:var(--muted);font-size:10px;font-style:normal}.privacy{color:var(--muted);align-items:center;gap:6px;font-size:12px;display:flex}.privacy .dot{background:#3fae72;border-radius:50%;width:6px;height:6px}.hero h1{font-size:24px;line-height:1.3}.hero p{color:var(--muted);margin:6px 0 0;font-size:14px}.dropzone{border:1.5px dashed var(--line);border-radius:var(--radius);background:var(--card);text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:3px;min-height:96px;padding:20px 16px;display:flex;position:relative}.dropzone.dragging{border-color:var(--accent);background:var(--accent-soft)}.dropzone input{opacity:0;cursor:pointer;position:absolute;inset:0}.dropzone-icon{background:var(--accent-soft);width:34px;height:34px;color:var(--accent);border-radius:50%;place-items:center;font-size:19px;display:grid}.dropzone strong{overflow-wrap:anywhere;font-size:15px}.dropzone small{color:var(--muted);font-size:12px}.stage{flex-direction:column;gap:10px;display:flex}.stage-bar{color:var(--muted);flex-wrap:wrap;gap:6px 8px;font-size:12px;display:flex}.stage-bar span{background:var(--card);border:1px solid var(--line);border-radius:999px;padding:3px 9px}.stage-bar .working{border-color:var(--accent);color:var(--accent)}.canvas-shell{border-radius:var(--radius);border:1px solid var(--line);-webkit-user-select:none;user-select:none;background-color:#fbfaf8;justify-content:center;width:100%;display:flex;position:relative;overflow:hidden}.canvas-shell canvas{max-width:100%;height:auto;display:block}.demo-tag{color:#fff;background:#22202ab8;border-radius:999px;padding:3px 9px;font-size:11px;position:absolute;top:10px;left:10px}.warning{background:var(--warn-soft);color:var(--warn);border:1px solid #f0d5bd;border-radius:10px;margin:0;padding:10px 12px;font-size:13px}.panel-hint{color:var(--muted);margin:-4px 0 12px;font-size:13px;line-height:1.45}.stage-foot{min-height:26px;font-size:13px}.legend{grid-template-columns:repeat(auto-fill,minmax(52px,1fr));gap:8px 6px;display:grid}.legend-item{flex-direction:column;align-items:center;gap:3px;min-width:0;padding:0;display:flex}.legend-swatch{width:100%;min-height:var(--tap);letter-spacing:.02em;border:1.5px solid #0000001f;border-radius:10px;place-items:center;font-size:12px;font-weight:700;display:grid}.legend-item small{color:var(--muted);font-variant-numeric:tabular-nums;font-size:11px}.legend-item.active .legend-swatch{border-color:var(--accent);box-shadow:0 0 0 2px var(--accent-soft)}.segmented.three{grid-template-columns:1fr 1fr 1fr}.segmented.three button{padding:8px 6px;font-size:13px}.stage-foot .hint{color:var(--muted)}.picked{align-items:center;gap:8px;display:inline-flex}.picked em{color:var(--muted);font-style:normal}.swatch{border:1px solid #0000001f;border-radius:6px;flex:none;width:18px;height:18px}.tabbar{z-index:5;background:#ebe6de;border-radius:12px;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px;display:grid;position:sticky;top:8px}.tabbar button{min-height:var(--tap);color:var(--muted);border-radius:9px;font-size:14px;font-weight:600}.tabbar button.active{background:var(--card);color:var(--ink);box-shadow:0 1px 3px #22202a1a}.sheet{flex-direction:column;display:flex}.sheet-panel{border-radius:var(--radius);border:1px solid var(--line);background:var(--card);flex-direction:column;gap:12px;padding:16px;display:none}.sheet-panel.active{display:flex}.sheet-panel h2{letter-spacing:.04em;color:var(--muted);text-transform:uppercase;font-size:13px}.preset-grid{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.preset{border:1.5px solid var(--line);text-align:left;border-radius:11px;flex-direction:column;gap:1px;min-height:84px;padding:10px 8px;display:flex}.preset.active{border-color:var(--accent);background:var(--accent-soft)}.preset b{font-size:16px}.preset span{color:var(--accent);font-size:12px;font-weight:600}.preset small{color:var(--muted);font-size:11px}.segmented{grid-template-columns:1fr 1fr;gap:8px;display:grid}.segmented button{min-height:var(--tap);border:1.5px solid var(--line);text-align:left;border-radius:11px;flex-direction:column;padding:8px 10px;font-size:14px;font-weight:600;display:flex}.segmented button small{color:var(--muted);font-size:11px;font-weight:400}.segmented button.active{border-color:var(--accent);background:var(--accent-soft)}.field{min-height:var(--tap);flex-direction:column;justify-content:center;gap:6px;display:flex}.field>span{justify-content:space-between;align-items:baseline;gap:8px;font-size:14px;display:flex}.field>span b{color:var(--accent)}.field>span small{color:var(--muted);font-size:12px;font-weight:400;display:block}.field.row,.field.switch{flex-direction:row;justify-content:space-between;align-items:center}.field.row>span,.field.switch>span{flex-direction:column;align-items:flex-start;gap:0}.field select{min-height:var(--tap);border:1.5px solid var(--line);background:var(--card);border-radius:10px;padding:0 10px}.field input[type=range]{width:100%;height:28px;accent-color:var(--accent)}.field input[type=checkbox]{width:46px;height:28px;accent-color:var(--accent);flex:none}.materials{-webkit-overflow-scrolling:touch;flex-direction:column;gap:2px;max-height:340px;display:flex;overflow-y:auto}.material{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:7px 2px;display:flex}.material-name{flex-direction:column;flex:1;line-height:1.25;display:flex}.material-name b{font-size:13px}.material-name small{color:var(--muted);font-size:11px}.material strong{font-variant-numeric:tabular-nums}.total{background:var(--accent-soft);border-radius:11px;justify-content:space-between;align-items:center;padding:12px;display:flex}.total span{flex-direction:column;font-size:14px;display:flex}.total small{color:var(--muted);font-size:11px}.total strong{color:var(--accent);font-size:18px}.primary,.pair button{min-height:var(--tap);border-radius:11px;font-weight:600}.primary{background:var(--accent);color:#fff}.pair{grid-template-columns:1fr 1fr;gap:8px;display:grid}.pair button{border:1.5px solid var(--line)}.status{color:var(--accent);margin:0;font-size:13px}.note{color:var(--muted);margin:0;font-size:12px}.modal{z-index:20;background:#22202a99;place-items:center;padding:20px;display:grid;position:fixed;inset:0}.modal-body{border-radius:var(--radius);background:var(--card);text-align:center;flex-direction:column;gap:10px;max-height:90vh;padding:16px;display:flex}.modal-body p{margin:0;font-size:14px}.modal-body img{object-fit:contain;border-radius:8px;max-width:100%;max-height:62vh}.modal-body button{min-height:var(--tap);border:1.5px solid var(--line);border-radius:11px}footer{text-align:center;color:var(--muted);padding:8px 0 0;font-size:12px}@media (min-width:860px){.app{gap:20px;padding:0 24px 56px}.hero h1{font-size:32px}.hero p{font-size:15px}.tabbar{display:none}.sheet{grid-template-columns:repeat(2,minmax(0,1fr));align-items:start;gap:16px;display:grid}.sheet-panel{display:flex}.sheet-panel[data-tab=params]{grid-row:span 2}}@media (min-width:1180px){.sheet{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr) minmax(0,1fr)}.sheet-panel[data-tab=params]{grid-row:auto}}