@charset "UTF-8";
:root{--paper:#f9f8f4;--ground:#efede8;--ink:#282936;--muted:#747482;--violet:#6252c4;--deep:#5141b2;--teal:#16887e;--rule:#d8d5dc;--font:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-family:var(--font);color:var(--ink);background:var(--ground);font-synthesis:none}*{box-sizing:border-box}body{margin:0}button,input,a{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}button{font:inherit;color:inherit;cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #a1d5c6;outline-offset:4px}button{border:0;background:none}button:disabled{cursor:default;opacity:.4}a{color:inherit;text-decoration:none}button:not(:disabled),a{transition:background .18s,color .18s,box-shadow .18s,transform .18s}button:not(:disabled):active{transform:translateY(1px)}[hidden]{display:none!important}.workshop{max-width:1440px;margin:auto;padding:0 48px}.topline{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:70px;border-bottom:1px solid #d4d1ce;font-size:12px;letter-spacing:.05em}.back{display:inline-flex;min-height:44px;align-items:center;gap:10px}.back span{font-size:25px;font-weight:300}.museum{color:var(--muted)}.text-button{min-height:44px;padding:8px 0;font-size:12px;white-space:nowrap}.text-button:hover{color:var(--violet)}.masthead{display:flex;align-items:center;gap:45px;padding:32px 0 30px;position:relative}.eyebrow{font:10px/1.6 var(--font);letter-spacing:.18em;margin:0 0 8px;color:var(--muted)}.eyebrow span{margin-left:15px;color:var(--violet)}h1{font-size:clamp(36px,4vw,62px);letter-spacing:-.055em;line-height:1.2;margin:0;font-weight:700}.title-dot{color:var(--violet)}.intro{font-size:13px;line-height:1.9;color:var(--muted);margin:19px 0 0;padding-left:30px;border-left:1px solid #d5d1d4;letter-spacing:.08em}.orbit-mark{width:90px;height:90px;position:absolute;right:30px;top:32px;transform:rotate(-28deg)}.orbit-mark i{position:absolute;border:1px solid #9c92c7;border-radius:50%;width:80px;height:42px;top:20px;left:0}.orbit-mark i:nth-child(2){transform:rotate(90deg)}.orbit-mark b{position:absolute;left:35px;top:35px;background:var(--violet);width:11px;height:11px;border-radius:50%}.desk{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:30px;align-items:stretch}.paper{position:relative;background:var(--paper);border:1px solid #d7d3df;box-shadow:0 6px 16px #25214205,4px 5px 0 -1px var(--ground),4px 5px 0 0 #d7d3df;min-width:0;display:flex;flex-direction:column}.paper:before{content:"";position:absolute;top:75px;bottom:77px;left:40px;width:1px;background:#dbb9bf33;pointer-events:none;z-index:1}.paper-top,.paper-bottom{display:flex;justify-content:space-between;align-items:center;gap:8px;position:relative;z-index:2}.paper-top{height:52px;padding:0 24px;border-bottom:1px solid #e9e6ec;font-size:11px;letter-spacing:.08em}.paper-label{color:var(--muted)}.live-state{font-size:10px;color:var(--teal);letter-spacing:0}.live-state i{display:inline-block;margin-right:6px;width:5px;height:5px;background:var(--teal);border-radius:50%;vertical-align:middle}.canvas-wrap{position:relative;min-height:410px;flex:1;background-image:linear-gradient(#8a7fb80a 1px,transparent 1px),linear-gradient(90deg,#8a7fb80a 1px,transparent 1px);background-size:24px 24px;overflow:hidden}#drawingCanvas{width:100%;height:100%;display:block;position:absolute;inset:0;touch-action:pan-y}.canvas-wrap.drawing{cursor:crosshair}.canvas-wrap.drawing #drawingCanvas{touch-action:none}.drawing-instruction{position:absolute;top:24px;left:20px;right:20px;pointer-events:none;text-align:center;color:var(--violet);font-size:14px;line-height:1.6}.drawing-instruction small{display:block;color:var(--muted);font-size:11px;margin-top:6px}.canvas-signature{position:absolute;left:24px;bottom:16px;font-size:10px;letter-spacing:.12em;color:#93909e;pointer-events:none}.paper-bottom{padding:10px 24px 14px;font-size:10px;color:var(--muted);background:var(--paper)}.legend{display:flex;gap:17px;align-items:center}.legend span{display:inline-flex;align-items:center;gap:6px}.legend i{width:17px;height:0;border-top:1.5px solid;display:inline-block}.source-key{border-color:#bab6c5!important;border-top-style:dashed!important}.trace-key{border-color:var(--violet)!important}.lap-display{font:10px/1.4 var(--font);font-variant-numeric:tabular-nums}.transport{border-top:1px solid #e1dfe5;display:flex;align-items:center;gap:10px;padding:8px 18px;background:#f5f3ef;min-height:60px}.icon-button{min-height:44px;display:inline-flex;align-items:center;gap:9px;font-size:12px;padding:8px 9px;white-space:nowrap}.icon-button:hover{background:#e7e2f0}.icon-button span:first-child{font-size:20px;line-height:1}.speed-button{font-size:11px;margin-right:auto;min-height:44px;padding:8px}.speed-button:hover{color:var(--violet)}.check-label{display:flex;align-items:center;gap:4px;font-size:11px;cursor:pointer;min-height:44px;white-space:nowrap}.check-label input{accent-color:var(--violet);width:15px;height:15px}.tools{padding:1px 0 0;display:flex;flex-direction:column}.tool-heading{display:flex;justify-content:space-between;align-items:center;font-size:12px;letter-spacing:.09em;margin:0 0 12px}.small-star{font-size:21px;color:var(--violet)}.draw-button{position:relative;min-height:78px;background:var(--violet);color:#fff;padding:14px 20px;text-align:left;font-size:17px;font-weight:600;letter-spacing:.1em;box-shadow:0 4px 0 #d8d1ec}.draw-button:hover{background:var(--deep);box-shadow:0 6px 0 #d8d1ec}.draw-button svg{width:23px;height:23px;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.5;margin:0 9px 2px 0}.draw-button span{display:block;margin:7px 0 0 35px;font-size:10px;font-weight:400;letter-spacing:0;color:#e5e0ff}.presets{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0 20px}.preset{height:77px;border:1px solid #d8d4df;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;background:#f6f4f0}.preset:hover,.preset.active{background:#e9e4f4;border-color:#a195c5;color:var(--violet)}.preset svg{height:35px;width:58px;overflow:visible;fill:none;stroke:currentColor;stroke-width:.035;stroke-linejoin:round;stroke-linecap:round}.preset span{font-size:10px}.ruler-section{border-top:1px solid #d6d2d9;padding-top:17px}.section-label{display:flex;justify-content:space-between;align-items:center;font-size:12px;line-height:1.5;letter-spacing:.03em}.tool-index{font-family:Georgia,serif;color:#aaa4b2;font-size:13px;font-style:italic}.count-line{display:flex;align-items:center;gap:12px;margin:6px 0 10px}.count-line>output{font-family:Georgia,"Times New Roman",serif;font-size:58px;line-height:1.1;letter-spacing:-.07em;font-weight:400;color:var(--violet);min-width:66px}.count-line>span{font-size:11px;line-height:1.8}.count-line small{font-size:9px;color:var(--muted)}.count-line .text-button{margin-left:auto;color:var(--violet);font-size:11px}.ruler{background:repeating-linear-gradient(90deg,#d5cfe0 0px,#d5cfe0 1px,transparent 1px,transparent calc(100% / 31));background-position:0 30px;background-size:100% 8px;background-repeat:no-repeat}.ruler input{width:100%;margin:0;height:44px;appearance:none;-webkit-appearance:none;background:transparent;cursor:ew-resize;display:block;accent-color:var(--violet)}.ruler input::-webkit-slider-runnable-track{height:3px;background:#c4bcd9}.ruler input::-webkit-slider-thumb{-webkit-appearance:none;width:19px;height:30px;border-radius:2px;background:var(--violet);margin-top:-14px;box-shadow:0 2px 4px #5141b228;border:3px solid var(--ground)}.ruler input::-moz-range-track{height:3px;background:#c4bcd9}.ruler input::-moz-range-thumb{width:16px;height:26px;border-radius:2px;background:var(--violet);border:3px solid var(--ground)}.ruler-labels{display:flex;justify-content:space-between;font-family:Georgia,serif;font-size:10px;color:#8a8493}.error-line{display:flex;justify-content:space-between;align-items:center;font-size:10px;margin-top:15px}.error-line output{font-size:13px;letter-spacing:.03em;color:var(--violet);font-variant-numeric:tabular-nums}.micro-copy{font-size:10px;line-height:1.8;color:var(--muted);margin:7px 0 20px}.component-section{border-top:1px solid #d6d2d9;padding-top:16px}.component-buttons{display:grid;grid-template-columns:repeat(6,1fr);gap:5px;margin-top:10px}.component-buttons button{font-family:Georgia,serif;font-size:12px;min-height:44px;background:#f5f2ed;border:1px solid #dad5df;position:relative}.component-buttons button.selected{background:#e3efeb;border-color:#6aa99c;color:var(--teal)}.component-buttons button:after{position:absolute;content:"";height:2px;background:#b8b0c7;bottom:5px;left:9px;right:9px;transform:scaleX(var(--amp));transform-origin:left}.component-buttons button.selected:after{background:var(--teal)}.component-detail{display:flex;align-items:center;gap:14px;margin-top:8px;min-height:94px}.component-detail canvas{width:83px;height:83px;flex-shrink:0}.component-detail>div{display:flex;flex-direction:column;gap:5px}.component-caption{font-size:9px;color:var(--muted)}.component-detail strong{font-size:12px;font-weight:500}.component-detail #componentRadius{font-size:10px;color:var(--muted)}.teal-caption{font-size:9px;color:var(--teal);line-height:1.5}.save-button{min-height:44px;border-top:1px solid #d6d2d9;margin-top:auto;padding:13px 0 0;text-align:left;font-size:10px;color:var(--muted);display:flex;align-items:center;justify-content:space-between}.save-button span{font-size:18px}.save-button:hover{color:var(--violet)}.footer{display:flex;justify-content:space-between;font-size:10px;line-height:1.6;color:#8b8592;margin:26px 0 24px;letter-spacing:.04em}.footer b{font-weight:400;margin-left:10px;font-size:9px}.drawing-actions{border-top:1px solid #e1dfe5;padding:12px 20px;min-height:95px}.drawing-actions>span{font-size:11px;line-height:1.5;color:var(--muted);display:block;margin-bottom:8px}.drawing-actions>div{display:flex;align-items:center;gap:10px}.primary-button,.secondary-button{min-height:44px;font-size:12px;padding:10px 16px}.primary-button{background:var(--violet);color:white}.secondary-button{border:1px solid #c7c0d4}.drawing-actions .text-button{margin-left:auto}dialog{background:#f9f8f4;color:var(--ink);border:1px solid #d5cfde;padding:24px 32px;width:min(600px,calc(100vw - 32px));max-height:85vh;box-shadow:0 20px 80px #21183830}dialog::backdrop{background:#26203166;backdrop-filter:blur(4px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;font-size:11px;color:var(--muted)}dialog h2{font-size:25px;line-height:1.5;margin:16px 0 20px}dialog p{font-size:12px;line-height:1.9;color:#62606d}dialog .source-note{border-top:1px solid #ded9e4;margin-top:24px;padding-top:20px}.source-note strong{font-size:12px}.source-note a{display:block;font-size:12px;line-height:1.7;color:var(--violet);min-height:32px;padding:4px 0}.source-note .source-date{font-size:10px;margin-bottom:0}
@media(min-width:1200px){.canvas-wrap{min-height:480px}.desk{grid-template-columns:minmax(0,1fr) 310px}.tools{padding-bottom:1px}}
@media(min-width:1600px){.workshop{padding-top:12px}.masthead{padding:40px 0}.canvas-wrap{min-height:540px}}
@media(max-width:1000px){.workshop{padding:0 28px}.desk{gap:22px;grid-template-columns:minmax(0,1fr) 265px}.masthead{gap:20px}.intro{font-size:11px;padding-left:20px}.orbit-mark{display:none}.canvas-wrap{min-height:410px}.transport{gap:4px;padding:8px}.paper-top{padding:0 16px}.paper-bottom{padding:10px 14px}.legend{gap:10px}.check-label{font-size:10px}.component-detail{gap:8px}.component-detail canvas{width:72px;height:72px}.component-buttons{gap:4px}}
@media(max-width:760px){.workshop{padding:0 18px}.topline{min-height:55px;font-size:10px}.museum{display:none}.text-button{font-size:10px}.masthead{padding:22px 0 20px;justify-content:space-between;gap:12px}.eyebrow{font-size:8px;letter-spacing:.12em;margin:0 0 7px}.eyebrow span{margin-left:8px}h1{font-size:38px}.intro{font-size:10px;line-height:1.8;padding:0;border:0;margin:18px 0 0;letter-spacing:0;max-width:100px}.desk{display:flex;flex-direction:column;gap:24px}.paper:before{left:27px;top:50px}.canvas-wrap{height:340px;min-height:0;flex:none}.paper-top{height:42px;font-size:10px}.live-state{font-size:9px}.paper-bottom{font-size:9px;padding:8px 13px 11px}.transport{gap:7px;padding:3px 10px;min-height:52px}.icon-button{font-size:11px;gap:6px;padding:8px}.speed-button{font-size:10px;padding:7px 5px}.check-label{gap:2px;font-size:10px}.check-label input{width:14px;height:14px;margin:3px}.tools{display:grid;grid-template-columns:1fr 1fr;gap:0 24px}.tool-heading{grid-column:1/-1;margin-bottom:11px}.draw-button{grid-column:1/-1;min-height:65px;padding:12px 18px;font-size:15px;display:flex;align-items:center;gap:9px}.draw-button svg{margin:0}.draw-button span{font-size:10px;margin:0 0 0 auto;letter-spacing:0}.presets{grid-column:1/-1;grid-template-columns:repeat(3,1fr);margin:16px 0 24px}.preset{height:66px;flex-direction:row;gap:8px}.preset svg{width:46px}.ruler-section{grid-column:1/2;padding-top:16px}.component-section{grid-column:2/3;padding-top:16px}.component-buttons{grid-template-columns:repeat(3,1fr);gap:4px}.component-buttons button{min-height:44px}.component-detail{flex-direction:column;align-items:flex-start;gap:0}.component-detail canvas{width:58px;height:58px;margin:2px 0}.component-detail>div{gap:5px}.component-caption{display:none}.component-detail strong{font-size:11px}.teal-caption{font-size:9px}.count-line{gap:6px;flex-wrap:wrap}.count-line>output{font-size:48px;min-width:51px}.count-line>span{font-size:10px}.count-line small{font-size:8px}.count-line .text-button{font-size:9px}.section-label{font-size:11px}.tool-index{display:none}.count-line>span small{display:block;line-height:1.3}.count-line>span br{display:none}.error-line{align-items:flex-start;gap:5px}.error-line span{font-size:9px;line-height:1.6}.error-line output{font-size:12px}.micro-copy{font-size:9px;line-height:1.8}.save-button{grid-column:1/-1;margin-top:20px;padding:12px 0}.footer{margin-top:22px;gap:12px;align-items:flex-start;font-size:9px}.footer span:last-child{text-align:right}.footer b{display:block;margin-left:0}.canvas-signature{font-size:9px;left:16px;bottom:12px}.drawing-instruction{font-size:12px}.drawing-instruction small{font-size:10px}.drawing-actions{padding:10px 12px}.drawing-actions>span{font-size:10px}.drawing-actions>div{gap:8px}.primary-button,.secondary-button{padding:8px 12px;font-size:11px}dialog{padding:18px 22px}dialog h2{font-size:23px}}
@media(max-width:390px){.workshop{padding:0 14px}.masthead{padding:18px 0 17px}.intro{display:none}.eyebrow{font-size:8px}h1{font-size:36px}.canvas-wrap{height:310px}.transport{gap:3px;padding:3px 7px}.icon-button{padding:7px}.tools{gap:0 18px}.count-line .text-button{margin-left:0}.draw-button span{font-size:9px}.legend{gap:9px}.component-detail strong{font-size:10px}}
@media(prefers-reduced-motion:reduce){button,a{transition:none}}

.quick-draw{display:none}.drawing .quick-draw{display:none}@media(max-width:760px){.quick-draw{display:block;position:absolute;right:12px;bottom:7px;min-height:44px;padding:10px 12px;border:1px solid #c5bcdf;background:#f4f0fb;color:var(--violet);font-size:11px;box-shadow:0 2px 5px #6553c80a}}
/* Keep the hand on the component ruler and the result on the same phone screen. */
@media(max-width:760px){
  .desk{gap:16px}
  .tools{display:contents}
  .paper{order:1}
  .canvas-wrap{height:300px}
  .ruler-section{order:2;border-top:0;padding-top:0}
  .ruler-section .count-line{gap:12px;flex-wrap:nowrap;margin:2px 0 0}
  .ruler-section .count-line>output{font-size:40px;line-height:1.1;min-width:54px}
  .ruler-section .count-line>span{font-size:11px}
  .ruler-section .count-line small{font-size:9px}
  .ruler-section .count-line .text-button{margin-left:auto;font-size:11px}
  .ruler-section .error-line{margin-top:7px;align-items:center}
  .ruler-section .micro-copy{margin:3px 0 0;font-size:10px}
  .tool-heading{order:3;margin:9px 0 -6px;padding-top:16px;border-top:1px solid var(--rule)}
  .draw-button{order:4}
  .presets{order:5;margin:0 0 5px}
  .component-section{order:6}
  .component-buttons{grid-template-columns:repeat(6,1fr);gap:7px}
  .component-detail{flex-direction:row;align-items:center;gap:20px;margin-top:10px;min-height:80px}
  .component-detail canvas{width:78px;height:78px}
  .component-caption{display:block}
  .component-detail strong{font-size:12px}
  .component-detail .teal-caption{font-size:10px}
  .save-button{order:7;margin-top:0}
}
@media(max-width:390px){.canvas-wrap{height:280px}}

/* Shared exhibit navigation and title hierarchy; scene styling stays individual. */
.topline {height:72px;min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-size:12px;letter-spacing:.05em}
.topline .back {display:inline-flex;align-items:center;gap:8px;min-height:44px;font-size:12px;font-weight:500;letter-spacing:.05em}
.topline .back > span {font-size:22px;font-weight:400}
.topline > button {margin-left:auto;min-height:44px;font-size:12px;letter-spacing:.05em}
.masthead .eyebrow {font-size:12px;line-height:1.6;letter-spacing:1.5px;margin:0 0 10px}
@media(max-width:760px){.topline {height:56px;min-height:56px} .masthead .eyebrow {font-size:11px;margin-bottom:8px}}


.topline .back{white-space:nowrap;letter-spacing:0} @media(max-width:760px){.topline{gap:8px} .topline .back{gap:5px} .topline > button{font-size:11px;padding-left:0;padding-right:0;white-space:nowrap}}