@charset "UTF-8";
:root{--paper:#f6f2e9;--white:#fffdf7;--ink:#292f32;--muted:#838079;--line:#ded9cd;--blue:#496d91;--accent:#bc583f;--green:#56725e;--mono:"SFMono-Regular",Consolas,monospace;--sans:"Avenir Next","PingFang SC","Microsoft Yahei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.6 var(--sans);-webkit-font-smoothing:antialiased}button,select,input{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.42}button{color:inherit}a{color:inherit;text-decoration:none}h1,h2,p{margin:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,.viewer:focus-visible{outline:3px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}.topbar{height:83px;border-bottom:1px solid var(--line);display:flex;align-items:center;margin:0 4%;gap:34px}.wordmark{display:flex;align-items:center;gap:11px;font-size:24px;font-weight:750;letter-spacing:-.06em;line-height:1}.brand-icon{height:34px;width:34px;background:var(--ink);color:var(--paper);display:grid;place-items:center;font:italic 800 27px Georgia}.brand-detail{display:block;font:7px/1.5 var(--mono);letter-spacing:.1em;margin-top:4px}.back-link{color:var(--muted);font-size:11px}.edition{margin-left:auto;font:9px var(--mono);letter-spacing:.09em;color:var(--muted)}.edition b{margin-left:17px;color:var(--ink);font-weight:500}.intro{padding:48px 0 32px;display:flex;justify-content:space-between;align-items:center;max-width:1550px;margin:auto;width:92%}.eyebrow{font:9px/1.5 var(--mono);letter-spacing:.14em;color:var(--accent);margin-bottom:13px}h1{font-size:clamp(27px,3vw,43px);letter-spacing:-.055em;line-height:1.35;font-weight:650}h1 span{font-weight:400}.intro-copy{font-size:13px;color:var(--muted);margin-top:14px}.intro-note{font:italic 13px/1.8 var(--sans);transform:rotate(-5deg);color:var(--blue);position:relative;margin-right:40px}.note-arrow{position:absolute;left:-60px;top:8px;font-size:48px;line-height:1;font-family:Georgia;font-style:normal;transform:rotate(12deg)}.workbench{width:92%;max-width:1550px;margin:0 auto;display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:24px;align-items:start}.visual-panel{border:1px solid var(--line);border-radius:9px;background:#faf7ef;overflow:hidden;position:sticky;top:20px}.scene-heading{height:54px;padding:0 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid #e6e0d4}.scene-title{display:flex;gap:8px;align-items:center;font-size:11px}.live-dot{width:6px;height:6px;border-radius:50%;background:var(--accent)}.cad-tag{font:8px var(--mono);letter-spacing:.08em;color:#a09b91}.viewer{height:clamp(400px,43vw,610px);position:relative;isolation:isolate;touch-action:none;overflow:hidden}.viewer canvas{display:block;width:100%;height:100%;position:relative;z-index:1}.viewer-grid{position:absolute;inset:0;background-image:radial-gradient(#dad4c7 .7px,transparent .7px);background-size:21px 21px;opacity:.45;mask-image:radial-gradient(ellipse,#000 20%,transparent 73%)}.view-controls{position:absolute;z-index:3;top:18px;left:18px;display:flex;gap:4px}.view-controls button{border:1px solid var(--line);border-radius:4px;background:#faf8f0df;height:30px;min-width:29px;font-size:13px;padding:0 9px;backdrop-filter:blur(5px)}.view-controls button span{font-size:10px;margin-left:4px}.view-controls button:hover,.view-controls button[aria-pressed=true]{background:var(--ink);color:white;border-color:var(--ink)}.viewer-footer{position:absolute;bottom:19px;left:23px;right:23px;z-index:2;display:flex;justify-content:space-between;pointer-events:none;color:#8b887e;font-size:9px}.orientation{font:8px var(--mono);letter-spacing:.04em}.model-label{position:absolute;z-index:2;pointer-events:none;padding:7px 12px;background:#fffdf6ed;border:1px solid var(--ink);border-radius:3px;font-size:10px;box-shadow:3px 3px 0 #292f3215;white-space:nowrap;transform:translate(-50%,-100%)}.model-label:after{content:"";position:absolute;height:24px;width:1px;background:var(--ink);left:50%;top:100%}.label-dot{display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--accent);margin-right:7px}.empty-label{position:absolute;z-index:2;bottom:65px;left:50%;transform:translateX(-50%);font-size:10px;white-space:nowrap;background:#fffdf5e6;padding:7px 12px;border-radius:3px}.display-toolbar{min-height:58px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:10px 21px;gap:10px}.tool-switches{display:flex;gap:17px}.toggle{font-size:10px;background:none;border:0;padding:4px 0;display:flex;align-items:center;gap:6px}.toggle i{width:22px;height:12px;border-radius:20px;background:#ddd9ce;position:relative;display:block}.toggle i:after{content:"";position:absolute;top:2px;left:2px;background:#fffdf7;width:8px;height:8px;border-radius:50%;transition:transform .2s}.toggle[aria-pressed=true] i{background:var(--blue)}.toggle[aria-pressed=true] i:after{transform:translateX(10px)}.swatches{display:flex;gap:7px}.swatch{width:17px;height:17px;border-radius:50%;border:2px solid var(--paper);background:var(--swatch);position:relative}.swatch.active:after{content:"";position:absolute;inset:-4px;border:1px solid var(--ink);border-radius:50%}.configuration{background:#efebe1;display:flex;align-items:center;gap:20px;padding:15px 23px;font-size:10px}.configuration b{font:23px/1 var(--mono);color:var(--accent)}.configuration>div:first-child{white-space:nowrap}.configuration>span{font-size:9px;color:var(--muted);margin-left:auto}.configuration-line{display:flex;gap:3px;flex:1;max-width:180px}.configuration-line i{height:11px;flex:1;border-radius:1px;background:#d8d3c7}.configuration-line i.installed{background:var(--blue)}.control-panel{min-width:0}.mode-tabs{display:flex;border-bottom:1px solid #cfc9bd;gap:0}.mode-tabs button{flex:1;background:none;border:0;border-bottom:2px solid transparent;padding:15px 5px 16px;font-size:12px;color:var(--muted);margin-bottom:-1px}.mode-tabs button.active{color:var(--ink);border-bottom-color:var(--ink);font-weight:650}.tab-panel{padding-top:23px}.panel-heading{display:flex;gap:10px;align-items:center}.panel-heading h2{font-size:14px;font-weight:650}.panel-heading p{font-size:10px;color:var(--muted);margin-top:3px}.step-circle{width:25px;height:25px;flex-shrink:0;border-radius:50%;border:1px solid var(--ink);display:grid;place-items:center;font:11px var(--mono)}.preset-row{display:flex;gap:5px;margin-top:17px}.preset-row button{background:none;border:1px solid var(--line);border-radius:4px;padding:7px 0;font-size:10px;flex:1}.preset-row button:hover,.preset-row button.active{background:var(--ink);border-color:var(--ink);color:var(--paper)}.slot-map{height:201px;display:grid;grid-template-columns:1fr 1.35fr 1fr;grid-template-rows:repeat(18,1fr);gap:3px;margin:16px auto 9px;padding:8px;background:#eae5db;border:1px solid #d8d1c4;border-radius:5px}.slot-map button{font:8px var(--mono);background:#d1d7d8;color:#5e6b70;border:1px solid #a8b3b5;border-radius:2px;min-height:0;overflow:hidden;padding:0 2px;position:relative}.slot-map button.module{background:var(--blue);color:white;border-color:#405c77}.slot-map button.empty{background:repeating-linear-gradient(135deg,transparent,transparent 4px,#d5ccbd 4px,#d5ccbd 5px);color:#9b8f7c;border-style:dashed;border-color:#a99e8b}.slot-map button.selected{outline:2px solid var(--accent);outline-offset:1px;z-index:1}.slot-map button.selected:after{content:"";width:4px;height:4px;border-radius:50%;background:var(--accent);position:absolute;top:3px;right:3px}.map-legend{display:flex;align-items:center;gap:11px;font-size:8px;color:var(--muted)}.map-legend span{display:flex;align-items:center;gap:4px}.map-legend i{width:7px;height:7px;display:inline-block;border-radius:1px}.legend-cover{background:#b5c2c7}.legend-module{background:var(--blue)}.legend-empty{border:1px dashed #a99e8b}.map-legend small{margin-left:auto;font-size:8px}.selected-slot{display:flex;align-items:center;gap:8px;border-bottom:1px solid var(--line);padding:16px 0 13px;font-size:10px}.selected-slot>span:first-child{font:10px var(--mono);color:var(--accent)}.selected-slot>b{font-weight:500}.status-chip{margin-left:auto;padding:2px 6px;background:#e8e4d8;color:#7c786d;border-radius:3px;font-size:8px}.second{margin-top:18px;margin-bottom:16px}.select-label{display:flex;justify-content:space-between;font-size:10px;margin-bottom:7px}.select-label span{color:var(--muted);font-size:9px}select{appearance:auto;width:100%;border:1px solid #c8c2b5;background:var(--white);border-radius:4px;height:39px;padding:0 10px;font-size:11px}.module-description{font-size:10px;line-height:1.8;color:var(--muted);min-height:49px;padding-top:9px}.action-row{display:flex;gap:8px;margin-top:10px}.primary-button,.secondary-button,.wide-button{border:1px solid var(--ink);border-radius:4px;padding:10px 14px;font-size:11px;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:40px}.primary-button{background:var(--ink);color:var(--paper);flex:1}.primary-button:hover{background:var(--blue);border-color:var(--blue)}.secondary-button{background:none;border-color:#c5beb0;justify-content:center}.secondary-button:hover,.wide-button:hover{background:#e8e2d5}.text-button{border:0;background:none;font-size:10px;color:var(--muted);padding:9px 0}.text-button:hover{color:var(--accent)}.mini-tip{border-top:1px dashed #cdc4b6;display:flex;gap:10px;font-size:10px;margin-top:7px;padding-top:11px;color:var(--muted);line-height:1.8}.mini-tip>span{font-size:23px;color:var(--accent);line-height:1.3}.loading{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;z-index:6;background:var(--paper);font-size:12px;color:var(--muted)}.loading-mark{font:italic 60px Georgia;color:var(--blue);margin-bottom:12px}.loading-track{height:2px;width:160px;background:var(--line);margin-top:20px}.loading-track i{display:block;width:5%;height:100%;background:var(--accent);transition:width .15s}.demo-context{background:#eee9df;border:1px solid var(--line);border-radius:5px;padding:14px 16px;margin-top:19px}.demo-context>span{font-size:10px;color:var(--muted);display:block}.demo-context>b{font-size:15px;margin-top:4px;display:block;font-weight:550}.demo-context .text-button{padding-bottom:0}.demo-steps{list-style:none;margin:20px 0;padding:0}.demo-steps li{position:relative;padding-bottom:14px}.demo-steps li:last-child{padding-bottom:0}.demo-steps li:not(:last-child):after{content:"";position:absolute;top:29px;left:13px;bottom:1px;width:1px;background:#d2cbbe}.demo-steps button{display:flex;align-items:center;gap:12px;background:none;border:0;width:100%;text-align:left;padding:0;font-size:11px;color:#9b9488}.demo-steps button>span{border:1px solid #c5bcad;width:27px;height:27px;display:grid;place-items:center;font:10px var(--mono);border-radius:50%;flex-shrink:0}.demo-steps li.current button{color:var(--ink);font-weight:600}.demo-steps li.current button>span{background:var(--accent);color:var(--paper);border-color:var(--accent)}.demo-steps li.done button{color:var(--green)}.demo-steps li.done button>span{background:#e4e8de;border-color:#b5bead}.demo-description{min-height:74px;font-size:11px;line-height:1.9;color:#746f65;background:#eee9de;padding:13px;border-radius:5px}.demo-progress{height:3px;background:#e2dbcf;margin:20px 0}.demo-progress i{display:block;height:100%;background:var(--accent);transition:width .4s}.demo-navigation{display:flex;gap:9px}.demo-navigation>*{flex:1}.wide-button{width:100%;background:none;border-color:#c5beb0;justify-content:center;margin-top:10px}.fine-print{font-size:9px;color:var(--muted);line-height:1.8;margin-top:10px}.video-preview{display:block;position:relative;margin-top:20px;border:1px solid var(--line);border-radius:5px;overflow:hidden}.video-preview img{width:100%;display:block}.video-preview span{position:absolute;bottom:12px;left:12px;background:var(--ink);color:var(--paper);padding:6px 12px;font-size:10px;border-radius:3px}.guide-overview{margin:20px 0}.guide-overview>div{display:flex;gap:20px;padding:11px 0;border-bottom:1px solid var(--line);font-size:11px}.guide-overview b{font:11px var(--mono);color:var(--accent)}.guide-text{font-size:11px;line-height:1.9;color:var(--muted);margin-bottom:20px}.try-section{width:92%;max-width:1550px;margin:65px auto 80px;display:grid;grid-template-columns:250px 1fr;gap:30px;border-top:1px solid var(--line);padding-top:30px}.try-heading h2{font-size:23px;font-weight:600;letter-spacing:-.05em}.try-heading h2 span{font-weight:400}.try-heading>p:last-child{font-size:10px;color:var(--muted);margin-top:12px;line-height:1.8}.try-controls{display:grid;grid-template-columns:.9fr 1.2fr 1.15fr .8fr;gap:24px;align-items:center}.control-eyebrow{font:9px var(--mono);color:var(--muted);display:block;margin-bottom:12px}.power-control>button{background:none;border:0;padding:0;display:flex;gap:9px;align-items:center;font-size:12px}.power-control button i{display:block;width:34px;height:19px;border-radius:20px;background:#d1cbbf;position:relative}.power-control button i:after{content:"";position:absolute;left:3px;top:3px;width:13px;height:13px;border-radius:50%;background:#fffdf7;transition:transform .2s}.power-control button[aria-pressed=true] i{background:var(--green)}.power-control button[aria-pressed=true] i:after{transform:translateX(15px)}.try-controls p{font-size:8px;color:var(--muted);margin-top:11px}.slider-control label{display:flex;justify-content:space-between;font-size:11px}.slider-control output{font:11px var(--mono);color:var(--accent)}.slider-control input{display:block;width:100%;accent-color:var(--accent);margin:14px 0 0;height:14px}.flap-control>div{display:flex;gap:4px}.flap-control button{border:1px solid #cfc7b9;background:none;min-height:29px;min-width:25px;padding:0 6px;border-radius:3px;font:9px var(--mono)}.flap-control button.active{background:var(--blue);color:var(--paper);border-color:var(--blue)}.operate-button{background:#ebe5d9;border:1px dashed #bdb3a2;border-radius:5px;padding:14px 12px;display:flex;flex-direction:column;align-items:flex-start;text-align:left;gap:5px}.operate-button>span{font-size:9px;color:var(--muted)}.operate-button>b{font-size:10px;font-weight:500}.assembly-section{width:92%;max-width:1550px;margin:0 auto}.assembly-heading{display:flex;justify-content:space-between;align-items:end;margin-bottom:25px}.assembly-heading h2{font-size:29px;font-weight:500;letter-spacing:-.04em}.assembly-heading>p{font-size:10px;color:var(--muted);line-height:1.8;text-align:right}.assembly-player{display:grid;grid-template-columns:minmax(0,1fr) 280px;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#efebe2}.video-wrap{min-width:0;display:flex;flex-direction:column;justify-content:center;background:#e7ecef}.video-wrap video{width:100%;max-height:550px;aspect-ratio:16/9;display:block}.video-caption{display:flex;justify-content:space-between;gap:15px;padding:13px 20px;background:#efeade;font-size:10px}.video-caption>span:last-child{font:8px var(--mono);color:var(--muted)}.video-sidebar{background:#f6f2e9;border-left:1px solid var(--line);padding:15px}.video-nav{display:flex;justify-content:space-between;align-items:center;padding-bottom:13px}.video-nav button{border:1px solid var(--line);background:none;border-radius:3px;width:30px;height:26px}.video-nav>span{font:10px var(--mono);color:var(--muted)}.video-list{height:340px;overflow-y:auto;scrollbar-width:thin}.video-list button{border:0;background:none;display:flex;gap:13px;align-items:center;padding:10px 8px;width:100%;text-align:left;font-size:10px;border-radius:3px}.video-list button>span{font:10px var(--mono);color:var(--muted);width:30px;flex-shrink:0}.video-list button.active{background:#e4ded2;color:var(--accent)}.video-list button.active>span{color:var(--accent)}.autoplay-label{font-size:9px;display:flex;align-items:center;gap:7px;margin-top:14px;border-top:1px solid var(--line);padding-top:11px}.autoplay-label input{accent-color:var(--blue)}.end-note{margin:75px auto 65px;width:92%;max-width:1550px;display:flex;gap:23px;align-items:center}.asterisk{font-size:63px;color:var(--accent);line-height:1}.end-note p{font-size:17px;color:var(--muted);line-height:1.8;letter-spacing:-.02em}.end-note b{font-weight:500;color:var(--ink)}.end-note button{margin-left:auto;border:1px solid #c7bdad;background:none;border-radius:4px;font-size:11px;padding:10px 15px}footer{border-top:1px solid var(--line);padding:25px 4%;display:flex;align-items:center;gap:40px;color:var(--muted);font-size:8px}footer>span{font:9px var(--mono);color:var(--ink);letter-spacing:.05em}footer p{margin-left:auto}footer p a{border-bottom:1px solid #c9c0b0}.toast{position:fixed;bottom:27px;left:50%;transform:translate(-50%,20px);background:var(--ink);color:var(--paper);padding:12px 22px;border-radius:5px;font-size:12px;z-index:100;box-shadow:0 6px 25px #0002;opacity:0;transition:opacity .2s,transform .2s;pointer-events:none;max-width:90vw;text-align:center}.toast.visible{opacity:1;transform:translate(-50%,0)}
@media(min-width:1600px){.workbench{grid-template-columns:minmax(0,1fr) 375px;gap:30px}.viewer{height:660px}.slot-map{height:218px}.tab-panel{padding-top:28px}.module-description{min-height:60px}.selected-slot{padding-top:20px;padding-bottom:20px}}
@media(max-width:1100px){.workbench{grid-template-columns:minmax(0,1fr) 320px;gap:17px}.scene-heading{padding:0 16px}.cad-tag{font-size:7px}.viewer{height:510px}.display-toolbar{padding:11px 14px;flex-wrap:wrap}.tool-switches{gap:13px}.configuration{padding:13px 15px;gap:10px}.configuration>span{display:none}.configuration-line{margin-left:auto;max-width:130px}.orientation{display:none}.try-section{grid-template-columns:190px 1fr;gap:20px}.try-controls{gap:20px;grid-template-columns:1fr 1fr 1fr}.operate-button{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between;padding:9px 12px}.try-heading h2{font-size:20px}.assembly-player{grid-template-columns:minmax(0,1fr) 245px}.video-list{height:280px}.video-caption>span:last-child{display:none}}
@media(max-width:760px){.topbar{height:66px;margin:0 5%;gap:20px}.edition{font-size:7px;letter-spacing:0}.edition b{display:none}.back-link{font-size:10px;margin-left:auto}.edition{display:none}.wordmark{font-size:21px}.brand-icon{height:30px;width:30px;font-size:24px}.intro{padding:30px 0 22px;width:90%}h1{font-size:27px}.intro-copy{font-size:11px;margin-top:9px}.intro-note{display:none}.eyebrow{font-size:8px;margin-bottom:10px}.workbench{width:90%;display:flex;flex-direction:column;gap:20px}.visual-panel{position:relative;top:auto;width:100%;border-radius:6px}.scene-heading{height:43px;padding:0 13px}.scene-title{font-size:9px}.cad-tag{font-size:6px;letter-spacing:0}.viewer{height:400px}.view-controls{top:12px;left:12px}.view-controls button{height:29px;padding:0 7px}.view-controls button span{font-size:9px}.viewer-footer{bottom:13px;left:15px;right:15px;font-size:8px}.display-toolbar{min-height:51px;padding:10px 13px;gap:12px}.tool-switches{gap:13px}.toggle{font-size:9px;gap:4px}.swatches{gap:5px}.swatch{height:14px;width:14px}.configuration{padding:11px 15px;font-size:9px}.configuration b{font-size:20px}.configuration-line{max-width:115px}.configuration-line i{height:9px;gap:2px}.control-panel{width:100%}.mode-tabs button{padding-top:10px;padding-bottom:14px;font-size:12px}.tab-panel{padding-top:20px}.panel-heading h2{font-size:14px}.panel-heading p{font-size:11px}.slot-map{max-width:380px;height:250px;padding:9px;gap:4px}.slot-map button{font-size:9px}.preset-row button{padding:8px 0;font-size:11px}.map-legend{font-size:9px}.map-legend small{font-size:8px}.selected-slot{font-size:12px;padding:18px 0}.selected-slot>span:first-child{font-size:11px}.status-chip{font-size:10px}.second{margin-top:20px}.select-label{font-size:11px}.select-label span{font-size:10px}select{height:45px;font-size:12px}.module-description{font-size:11px;min-height:45px}.primary-button,.secondary-button,.wide-button{font-size:12px;min-height:44px}.text-button{font-size:11px}.mini-tip{font-size:11px;margin-top:10px}.try-section{width:90%;display:block;margin-top:40px;margin-bottom:50px;padding-top:24px}.try-heading{margin-bottom:26px}.try-heading h2{font-size:23px}.try-heading>p:last-child{font-size:11px}.try-controls{display:grid;grid-template-columns:1fr 1fr;gap:25px}.flap-control{grid-column:1/-1}.flap-control button{height:32px;min-width:40px}.flap-control>div{gap:8px}.try-controls p{font-size:9px}.control-eyebrow{font-size:9px}.operate-button{grid-column:1/-1}.operate-button>span{font-size:10px}.operate-button>b{font-size:11px}.assembly-section{width:90%}.assembly-heading{gap:15px}.assembly-heading h2{font-size:23px}.assembly-heading>p{font-size:8px;white-space:nowrap}.assembly-heading .eyebrow{font-size:7px}.assembly-player{display:block}.video-caption{font-size:10px;padding:12px}.video-sidebar{border-left:0;border-top:1px solid var(--line);padding:14px}.video-list{height:215px}.video-list button{font-size:11px;padding:10px}.video-nav>span{font-size:11px}.autoplay-label{font-size:10px}.end-note{width:90%;margin:40px auto;gap:15px;flex-wrap:wrap}.asterisk{font-size:43px}.end-note p{font-size:13px}.end-note button{font-size:10px;margin-left:59px}footer{padding:20px 5%;flex-wrap:wrap;gap:15px}footer p{margin-left:0;order:3;width:100%;font-size:8px;line-height:1.8}footer>a{margin-left:auto;font-size:10px}.toast{bottom:18px;width:max-content;font-size:11px}.demo-description{font-size:12px}.demo-steps button{font-size:12px}.demo-steps li{padding-bottom:17px}.guide-text{font-size:12px}.guide-overview>div{font-size:12px}.video-preview{max-width:430px;margin-left:auto;margin-right:auto}}
@media(max-width:380px){.viewer{height:340px}.view-controls button{padding:0 6px}.view-controls button span{display:none}.display-toolbar{justify-content:center}.configuration-line{max-width:100px}.try-controls{gap:20px 15px}.scene-title{font-size:8px}h1{font-size:24px}.slot-map{height:220px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}