:root{color:#22302d;font-synthesis:none;--ink:#22302d;--muted:#6f7c78;--line:#dde4e1;--surface:#fff;--accent:#147d72;--accent-soft:#e7f3f0;--shadow:0 20px 55px #20342f1a;background:#f4f6f4;font-family:Inter,Noto Sans SC,Microsoft YaHei,system-ui,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100vh;margin:0}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:fixed;overflow:hidden}.app-shell{min-height:100vh;padding:0 28px 28px}.topbar{grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;height:70px;display:grid}.brand{color:var(--ink);align-items:center;gap:10px;font-size:18px;font-weight:760;text-decoration:none;display:inline-flex}.brand-mark{color:#fff;background:var(--ink);border-radius:12px;place-items:center;width:34px;height:34px;font-size:15px;display:grid}.project-title{color:var(--muted);font-size:14px}.save-dot{background:#56a67c;border-radius:50%;width:7px;height:7px;margin-right:8px;display:inline-block}.save-dot.loading{background:#d39a37;animation:1s infinite alternate save-pulse}.save-dot.error{background:#cc5148}@keyframes save-pulse{to{opacity:.35}}.top-actions{justify-content:flex-end;gap:6px;display:flex}.top-actions button,.category-list button{color:#56635f;background:0 0;border:0;border-radius:10px;padding:9px 13px}.top-actions button:hover,.category-list button:hover{color:var(--ink);background:#e9eeeb}.top-actions 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span{color:#fff;background:var(--accent)}.canvas-placeholder{background:#f7f9f7;min-height:520px;position:relative;overflow:hidden}.canvas-workspace{touch-action:none;position:absolute;inset:0}.canvas-onboarding{text-align:center;pointer-events:none;background:radial-gradient(circle,#f8faf8f5,#f8faf866 55%,#0000 75%);place-content:center;justify-items:center;padding:32px;display:grid;position:absolute;inset:0}.canvas-onboarding>*{pointer-events:auto}.empty-icon{width:68px;height:68px;color:var(--accent);background:var(--accent-soft);border-radius:22px;place-items:center;margin-bottom:16px;font-size:34px;display:grid}.canvas-onboarding h2{margin:0;font-size:24px}.canvas-onboarding p{max-width:430px;color:var(--muted);margin:10px 0 20px;line-height:1.65}.primary-button{color:#fff;background:var(--accent);border:0;border-radius:12px;padding:11px 18px;box-shadow:0 8px 18px #147d722e}.text-button{color:var(--accent);background:0 0;border:0;margin-top:8px;padding:8px 12px}.canvas-hud{color:var(--muted);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffe6;border:1px solid #22302d1a;border-radius:11px;align-items:center;gap:7px;padding:7px 8px 7px 11px;font-size:11px;display:flex;position:absolute;bottom:14px;left:14px;box-shadow:0 5px 20px #22302d14}.canvas-hud span:first-child{color:var(--ink);font-weight:760}.canvas-hud button{color:var(--accent);background:var(--accent-soft);border:0;border-radius:6px;padding:4px 7px;font-size:11px}.renovation-toolbar{z-index:3;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffeb;border:1px solid #22302d1a;border-radius:11px;align-items:center;gap:3px;padding:4px;display:flex;position:absolute;top:13px;left:13px;box-shadow:0 7px 22px #22302d17}.renovation-toolbar button,.three-renovation-switch button{color:var(--muted);background:0 0;border:0;border-radius:7px;padding:7px 10px;font-size:11px}.renovation-toolbar button.active,.three-renovation-switch 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var(--line);color:var(--muted);background:#fff;border-radius:8px;align-items:center;gap:5px;padding:7px 5px;font-size:10px;display:flex}.system-grid button i,.engineering-badge i{background:var(--system-color);border-radius:50%;width:8px;height:8px}.system-grid button.active{color:var(--system-color);border-color:var(--system-color);background:color-mix(in srgb, var(--system-color) 8%, white)}.engineering-badge{color:var(--system-color);background:color-mix(in srgb, var(--system-color) 10%, white);border-radius:9px;align-items:center;gap:7px;padding:9px 10px;font-size:12px;font-weight:720;display:flex}.rule-summary{color:#2d7464;background:#edf8f4;border-radius:10px;align-items:baseline;gap:7px;padding:10px;display:flex}.rule-summary.has-issues{color:#9a621f;background:#fff6e6}.rule-summary strong{font-size:19px}.rule-summary span{font-size:10px}.rule-issue{border-radius:7px;margin-top:6px;padding:7px 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strong{color:var(--ink);font-size:20px}.scene-stat-grid span{color:var(--muted);font-size:11px}.scene-stat-grid .stat-warning{background:#fff1ee}.scene-stat-grid .stat-warning strong,.scene-stat-grid .stat-warning span{color:#b3483d}.material-presets{gap:7px;display:grid}.material-presets button{border:1px solid var(--line);color:var(--ink);text-align:left;background:#fff;border-radius:11px;align-items:center;gap:10px;padding:9px;font-size:12px;display:flex}.material-presets button:hover{background:#f7fbfa;border-color:#aaccc4}.material-swatch{border:1px solid #22302d1a;border-radius:8px;width:38px;height:28px;display:flex;overflow:hidden}.material-swatch i{flex:1}.scene-controls{gap:11px;display:grid}.scene-controls h3{margin-bottom:0}.scene-controls label{color:var(--muted);grid-template-columns:1fr 70px;align-items:center;gap:10px;font-size:12px;display:grid}.scene-controls input[type=color]{border:1px solid var(--line);background:#fff;border-radius:8px;width:70px;height:34px;padding:3px}.scene-controls input[type=range]{width:70px;accent-color:var(--accent)}.scene-note{color:#32665f;background:var(--accent-soft);border-radius:13px;margin-top:24px;padding:14px}.scene-note strong{font-size:12px}.scene-note p{margin:5px 0 0;font-size:11px;line-height:1.55}@media (width<=900px){.app-shell{padding:env(safe-area-inset-top) 12px calc(12px + env(safe-area-inset-bottom))}.topbar{grid-template-columns:1fr auto}.project-title,.top-actions button:not(.export-button){display:none}.top-actions .view-switch{display:flex}.top-actions .view-switch button,.top-actions .export-menu button{display:block}.intro{flex-direction:column;align-items:start;gap:10px;padding:0 5px}.editor-card{border-radius:20px;grid-template-rows:minmax(470px,1fr) auto 78px;grid-template-columns:1fr;min-height:950px}.canvas-placeholder{grid-row:1;min-height:470px}.tool-rail{border-top:1px solid var(--line);border-right:0;grid-row:3;gap:6px;padding:8px;display:flex;overflow-x:auto}.tool{min-width:64px;margin:0}.property-panel{border-top:1px solid var(--line);border-left:0;grid-row:2;max-height:230px;padding:15px 18px;overflow-y:auto}.property-panel .panel-section:not(.property-form){display:none}.catalog-bar{grid-area:4/1;padding:12px}.catalog-title{display:none}.furniture-catalog{grid-template-columns:1fr;gap:8px;min-height:225px;padding:11px;display:grid}.catalog-controls{grid-template-columns:100px 1fr;width:100%;display:grid}.catalog-categories{grid-template-columns:repeat(7,minmax(48px,1fr));overflow-x:auto}.furniture-list{min-height:105px}.furniture-card{flex-basis:210px}.three-workspace{border-radius:20px;grid-template-rows:520px auto 225px;grid-template-columns:1fr;height:auto;min-height:1020px}.three-canvas{min-height:520px}.three-sidebar{border-top:1px solid var(--line);border-left:0;padding:16px 18px}.three-workspace>.furniture-catalog{grid-area:3/1}.three-sidebar .panel-section{margin-top:16px}.three-help,.renovation-legend{display:none}.engineering-legend{max-width:calc(100% - 26px);top:58px;left:13px;right:auto}.three-renovation-switch{top:66px;left:16px;right:auto}button{min-height:42px}.tool{min-height:62px}}@media (width<=560px){.topbar{gap:8px;height:auto;min-height:64px}.brand{font-size:15px}.brand-mark{width:31px;height:31px}.top-actions{gap:3px}.top-actions button{padding-inline:9px}.intro{margin-top:10px}.intro h1{font-size:28px}.intro p{font-size:13px}.renovation-toolbar{max-width:calc(100% - 26px);overflow-x:auto}.renovation-toolbar button{white-space:nowrap}}