:root{--blue:#0b63c7;--ink:#102033;--muted:#607184;--border:#dce5ee;--soft:#eef7ff;--bg:#f5f8fb}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",system-ui,sans-serif}button,input,select{font:inherit}button{cursor:pointer;border:1px solid var(--border);background:#fff;color:#24537a;min-height:36px;padding:6px 12px;border-radius:5px}button:hover{border-color:#76acd4;background:var(--soft)}button:disabled{opacity:.42;cursor:default}button.primary,button.active{background:var(--blue);border-color:var(--blue);color:white}button:focus-visible,input:focus-visible,select:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #85c6ff;outline-offset:3px}input,select{max-width:100%;min-height:34px;border:1px solid var(--border);border-radius:4px;padding:3px 7px;color:var(--ink);background:#fff}input[type=range]{accent-color:var(--blue);padding:0;min-height:22px}label{font-size:12px;color:var(--muted)}p{margin:0 0 12px}h1,h2,h3{margin:0;line-height:1.4}h1{font-size:23px;font-weight:850}h2{font-size:21px}h3{font-size:15px}a{color:var(--blue)}.top{display:flex;align-items:center;justify-content:space-between;padding:16px 28px;background:white;border-bottom:1px solid var(--border);gap:16px}.brand{font-size:11px;letter-spacing:.08em;color:#577188}.top-actions{display:flex;align-items:center;gap:8px}.top-actions span{font:12px ui-monospace,monospace;color:var(--muted);min-width:46px;text-align:center}.category-strip{display:flex;overflow:auto;gap:7px;padding:10px 28px;border-bottom:1px solid var(--border);background:white}.category-strip button{font-size:12px;white-space:nowrap;border-color:transparent;min-height:32px}.category-strip button.active{background:#d8ecff;color:#074f9f}.workspace{max-width:1700px;margin:0 auto;padding:22px 26px;display:grid;grid-template-columns:minmax(320px,.82fr) minmax(540px,1.18fr);gap:24px;align-items:start}.question-pane{background:white;border:1px solid var(--border);padding:23px;border-radius:7px;min-width:0}.question-meta{font-size:12px;color:var(--blue);margin-bottom:7px}.question-pane h2{font-size:24px;letter-spacing:-.02em;margin-bottom:22px}.document{font-size:16px;line-height:1.9;overflow-wrap:anywhere}.document p{margin:0 0 14px}.document blockquote{margin:10px 0;padding:0}.document figure{text-align:center;margin:15px 0}.document img{max-width:100%;height:auto;vertical-align:middle;cursor:zoom-in}.document>p>img{display:block;margin:16px auto}.document figure img{max-height:280px;width:auto;max-width:100%}.document math{font-size:1.06em}.document math[display=block]{display:block;overflow-x:auto;padding:6px 0;max-width:100%}details{border-top:1px solid var(--border);padding:13px 0;margin-top:14px}summary{cursor:pointer;font-size:14px;font-weight:700;color:#285576}summary small{font-weight:400;font-size:11px;color:var(--muted);margin-left:9px}details>div,details>p{margin-top:13px}.teacher .document{font-size:14px}.source-note{font-size:11px;color:var(--muted);margin-top:20px;line-height:1.8}.answer-note{background:#fff7e9;padding:12px;font-size:13px}.visual-pane{min-width:0}.visual-heading{display:flex;justify-content:space-between;gap:12px;align-items:center;margin-bottom:14px}.visual-heading h2{font-size:21px}.eyebrow{color:var(--blue);font-size:11px;margin-bottom:3px;font-weight:700;letter-spacing:.06em}.viewbar{display:flex;gap:9px;align-items:center;flex-wrap:wrap;padding:10px 12px;background:white;border:1px solid var(--border);border-bottom:0;border-radius:7px 7px 0 0}.viewbar label{display:flex;gap:5px;align-items:center}.viewbar select,.viewbar button{font-size:12px}.seg{display:flex;gap:2px}.seg button{border:0;padding:5px 8px}.stage-wrap{position:relative;border:1px solid var(--border);background:#f4f8fb}.stage-wrap #stage{height:430px;position:relative;overflow:hidden;touch-action:none}#stage>canvas{display:block;width:100%;height:100%}.labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}.scene-label{position:absolute;left:0;top:0;white-space:nowrap;font-size:11px;line-height:1.2;color:#21445b;background:#ffffffe8;padding:2px 4px;border-radius:2px}.stage-badge{position:absolute;top:10px;left:12px;padding:4px 8px;background:#fffffff0;color:#285574;font-size:12px;border-left:3px solid #0b63c7;pointer-events:none;max-width:83%}.legend{position:absolute;bottom:33px;left:12px;background:#ffffffdb;padding:3px 6px;border-radius:3px;font-size:11px;color:#345269;pointer-events:none}.legend span#heightLegend{margin-left:10px}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin:0 4px 0 9px}.dot.teal{background:#247d75}.dot.orange{background:#d97815}.dot.blue{background:#1969ba}.stage-help{position:absolute;bottom:9px;left:14px;font-size:11px;color:#566c7e;pointer-events:none}.transport{display:flex;align-items:center;gap:7px;flex-wrap:wrap;background:white;padding:12px;border:1px solid var(--border);border-top:0}.transport output{font-size:12px;color:var(--muted);margin-left:auto;font-variant-numeric:tabular-nums}.transport button{font-size:13px}.transport label{display:flex;gap:5px;align-items:center}.special{background:#eaf4fd;border:1px solid #c9dfef;border-top:0;padding:10px 12px;display:flex;gap:7px;flex-wrap:wrap;align-items:center}.special:empty{display:none}.special button{font-size:12px}.special span{font-size:12px;color:#4e687f;flex:1;min-width:170px}.readouts{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:12px 2px}.readouts>div{border-left:2px solid #c5d9e9;padding-left:10px;min-width:0}.readouts small{display:block;font-size:10px;color:var(--muted)}.readouts b{font:16px ui-monospace,SFMono-Regular,monospace;color:#21445c;overflow-wrap:anywhere}.readouts em{font-size:10px;font-style:normal;margin-left:3px;color:var(--muted)}.parameters{display:flex;align-items:end;gap:8px 14px;flex-wrap:wrap;padding:12px 14px;background:white;border:1px solid var(--border);border-radius:5px}.parameters:empty{display:none}.parameters label{display:flex;flex-direction:column;gap:3px}.parameters input[type=number]{width:86px}.parameters select{max-width:165px}.parameters .wide{min-width:130px}.analysis-grid{display:grid;grid-template-columns:1.25fr 1fr;gap:14px;margin-top:16px;align-items:start}.chart-box{min-width:0;border:1px solid var(--border);background:white;border-radius:6px;padding:11px}.chart-heading{font-size:12px}.chart-heading>div{display:flex;gap:9px;flex-wrap:wrap;margin-top:6px}.chart-heading label{font-size:10px}.chart-heading select{font-size:11px;min-height:24px}.chart-heading input{width:75px;vertical-align:middle}#chart{width:100%;height:210px;display:block}.chart-note{font-size:10px;line-height:1.65;color:var(--muted);margin:5px 0 0}.observations{padding:12px 4px;min-width:0}.observations h3{font-size:13px;color:var(--blue)}.observations ol{padding-left:18px;margin:10px 0;font-size:13px;line-height:1.85}.observations li{margin-bottom:7px}.point-buttons{display:flex;flex-wrap:wrap;gap:5px}.point-buttons button{min-height:28px;padding:3px 8px;font-size:11px}.model-note{font-size:12px;color:var(--muted)}.model-note p{margin-top:10px}#sourceEditor{background:white;padding:12px 16px;border:1px solid var(--border);border-radius:5px;font-size:12px}#sourceEditor table{width:100%;border-collapse:collapse;margin:10px 0}#sourceEditor th{font-size:11px;font-weight:500;color:var(--muted)}#sourceEditor td{padding:3px}#sourceEditor input{width:100%;min-width:0;font-size:12px}#sourceEditor button{font-size:11px;min-height:30px}.row{display:flex;gap:6px;flex-wrap:wrap}.visual-pane:fullscreen{overflow:auto;background:var(--bg);padding:22px 5vw}.visual-pane:fullscreen #stage{height:60vh}.visual-pane:fullscreen .analysis-grid{grid-template-columns:2fr 1fr}footer{font-size:11px;color:var(--muted);border-top:1px solid var(--border);padding:18px 28px;text-align:center}footer a{margin-left:16px}dialog{border:1px solid #b6cde0;border-radius:8px;box-shadow:0 18px 60px #10203333;max-width:94vw;max-height:90vh;color:var(--ink)}dialog::backdrop{background:#142d4670}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:16px}#catalog{width:680px;padding:24px}#search{width:100%;margin-top:5px;padding:8px}#catalogList{margin-top:16px}#catalogList h3{margin:18px 0 6px;color:var(--muted);font-size:12px}#catalogList button{display:block;text-align:left;width:100%;margin-bottom:5px;background:#f8fbfd;border-color:#edf2f7;padding:9px 12px}#catalogList button.active{background:#d8ecff;color:#074f9f}#catalogList small{display:block;color:var(--muted);font-size:10px}#imageDialog button{display:block;margin:0 0 14px auto}#imageDialog img{display:block;max-width:85vw;min-width:min(500px,78vw);max-height:76vh;object-fit:contain}.empty{font-size:13px;color:var(--muted);padding:20px}.error{color:#8a2929;background:#fff0ec;padding:18px}.kinetic{color:#9b5712}.fullrow{grid-column:1/-1}
@media(min-width:1500px){.workspace{grid-template-columns:minmax(400px,.8fr) minmax(700px,1.2fr)}.stage-wrap #stage{height:475px}}
@media(max-width:1120px){.workspace{grid-template-columns:minmax(290px,.8fr) minmax(470px,1.2fr);padding:16px;gap:16px}.question-pane{padding:18px}.analysis-grid{grid-template-columns:1fr}.observations{padding:8px}.stage-wrap #stage{height:385px}.viewbar{gap:5px}.top{padding:14px 18px}.category-strip{padding:8px 18px}}
@media(max-width:820px){.workspace{display:block;padding:13px}.question-pane{margin-bottom:18px}.question-pane h2{font-size:21px}.top{padding:12px;align-items:flex-start}.top h1{font-size:18px}.brand{font-size:9px}.top-actions{gap:4px;flex-wrap:wrap;justify-content:flex-end;max-width:210px}.top-actions button{font-size:11px;padding:5px 7px}.top-actions #catalogButton{width:100%}.category-strip{padding:8px 12px}.analysis-grid{grid-template-columns:1.3fr 1fr}.document{font-size:15px}.stage-wrap #stage{height:400px}}
@media(max-width:520px){.analysis-grid{grid-template-columns:1fr}.stage-wrap #stage{height:345px}.readouts{gap:6px}.readouts b{font-size:13px}.readouts em{display:block;margin-left:0}.readouts small{font-size:9px}.visual-heading h2{font-size:18px}.visual-heading button{font-size:11px}.viewbar{padding:8px}.viewbar label{font-size:10px}.viewbar select{font-size:11px}.transport{gap:5px}.transport button{font-size:12px;min-height:40px}.special button{min-height:40px}.parameters input{min-height:40px}.observations{padding:8px 3px}.question-pane{padding:16px}.top-actions span{min-width:35px}#catalog{padding:16px}.document img{max-height:240px}.document figure img{max-height:260px}.source-note{font-size:10px}}
@media print{.top-actions,.category-strip,.visual-pane,footer,.source-note{display:none}.workspace{display:block}.question-pane{border:0}.question-pane details{display:block}.document img{max-height:220px}body{background:white}.question-pane h2{font-size:20px}@page{margin:16mm}}

.document img.inline-formula{display:inline!important;max-height:1.65em;width:auto;margin:0 .15em;vertical-align:middle}.viewbar .check{gap:3px}.check input{min-height:0}

#stage.opus-field .scene-label{background:#0d1937c9;color:#e7f2ff;border:1px solid #ffffff15;padding:2px 5px;font-weight:600} .scale-bar{position:absolute;right:12px;top:50px;bottom:60px;display:flex;flex-direction:column;align-items:center;pointer-events:none;color:#eaf2ff;font:11px ui-monospace,monospace;text-shadow:0 1px 3px #000}.scale-bar i{width:11px;flex:1;margin:6px 0;border:1px solid #ffffff55;background:linear-gradient(to top,#1b2a6b,#2456a6 18%,#1f9bb8 36%,#5fcf9f 52%,#e8d26a 68%,#f39a4e 84%,#e2475c)} .stage-badge{max-width:82%}.point-compare{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;padding:6px 0}.point-compare strong{color:#083e80}.special .option-button{min-width:54px}.stage-help{background:#ffffffdd;padding:2px 6px;border-radius:3px}.visual-pane .viewbar{gap:5px}.viewbar button{padding-inline:7px}

@media(min-width:821px) and (max-height:840px){.stage-wrap #stage{height:315px}.top{padding-block:11px}.workspace{padding-top:14px}.visual-heading{margin-bottom:9px}.category-strip{padding-block:7px}.special{padding-block:6px}.viewbar{padding:8px}.readouts{padding-block:9px}}

.point-jump{display:flex;gap:9px;align-items:center;flex-wrap:wrap;background:#e9f4ff;border:1px solid #d2e4f5;border-radius:5px;padding:7px 10px;margin-bottom:9px}.point-jump b{font-size:12px;color:#426681}.point-jump button{font-size:12px;min-height:31px}.point-jump button[aria-pressed="true"]{background:#0b63c7;color:white}.point-jump #resetFocus{margin-left:auto}.tank-host{position:absolute;inset:0;background:#0e1a2f;overflow:hidden}.tank-host>canvas{display:block;touch-action:none}.tank-host .probe-tip{position:absolute;top:0;left:0;max-width:230px;pointer-events:none;opacity:0;z-index:4;padding:9px 12px;background:#101e33ed;color:#e9f4ff;border:1px solid #5b8bb3;border-radius:5px;font-size:12px;line-height:1.65}.tank-host .probe-tip small,.tank-host .probe-tip b,.tank-host .probe-tip span{display:block}.tank-loading{position:absolute;left:15px;top:45px;right:15px;z-index:5;padding:12px;background:#163149ed;color:#e5f5ff;border-radius:6px;font-size:13px}#detailChart{width:100%;height:210px;display:block}#positiveDetail{border-top:1px solid #dbe5ef;padding-top:13px;margin-top:12px}#positiveDetail>b{font-size:11px;color:#2a6592}.point-jump+ .viewbar{border-radius:5px 5px 0 0}@media(max-width:520px){.point-jump{gap:6px;padding:7px}.point-jump button{min-height:36px}.point-jump b{font-size:11px}.point-jump #resetFocus{margin-left:0}}

#questionCurve{display:block;width:100%;height:150px;background:#f7fbff;border:1px solid var(--border);border-bottom:0}
/* 第3、4题：电子透镜工作台 */
.lens-host{margin-top:4px}.lens-tasks{background:#fff;border:1px solid var(--border);border-radius:7px;padding:10px 14px;margin-bottom:10px}.lens-tasks h3{font-size:13px;color:#285576;margin-bottom:4px}.lens-tasks ol{margin:0;padding-left:20px;font-size:13px;line-height:1.7;color:#34506a}
.lens-host .lens-studio{font-size:13px}