:root{--paper:#f6f2e8;--panel:#fffdf7;--ink:#242e2c;--sub:#69716b;--jade:#315f55;--jade-light:#e4ece4;--wine:#873749;--gold:#b18a44;--line:#deded2;--shadow:0 18px 48px #34433a17;font-family:SimHei,"黑体",sans-serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,.file-button{cursor:pointer;border:1px solid var(--line);border-radius:9px;background:var(--panel);color:var(--ink);padding:10px 14px;font-size:14px;transition:background .15s,box-shadow .15s}button:hover,.file-button:hover{background:#ececde;border-color:#adb9ad}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #c89a42;outline-offset:3px}button:disabled{cursor:not-allowed;opacity:.48}button.active,button[aria-pressed=true]{background:var(--jade-light);border-color:var(--jade);color:var(--jade)}button.primary,.primary{background:var(--jade);border-color:var(--jade);color:white}button.primary:hover{background:#244c44}button.text-button{border:0;background:none;color:var(--sub);text-decoration:underline}p{line-height:1.65}h1,h2,h3,h4,p{margin-top:0}h1,h2{font-family:SimSun,"宋体",serif;font-weight:700;letter-spacing:.02em}h1{font-size:clamp(30px,3.4vw,49px);line-height:1.32;margin-bottom:18px}h2{font-size:29px;margin-bottom:12px}h3{font-size:20px;line-height:1.5}h4{font-size:14px;margin:16px 0 8px}.eyebrow{font-size:12px;letter-spacing:.12em;color:var(--gold);margin-bottom:12px}.muted{color:var(--sub);font-size:13px;line-height:1.7}.top{height:72px;background:#fffdf7ee;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:22px;padding:0 24px;position:fixed;top:0;left:0;right:0;z-index:30}.brand{display:flex;align-items:center;gap:11px;border:0;background:none;padding:0;text-align:left;min-width:195px}.brand b{display:block;font:700 20px SimSun,"宋体",serif;letter-spacing:.12em}.brand small{display:block;font-size:10px;letter-spacing:.12em;color:var(--sub);margin-top:4px}.logo-crop{display:block;width:55px;height:34px;overflow:hidden;position:relative}.logo-crop img{position:absolute;width:464px;max-width:none;left:-26px;top:-605px}.course-label{font-size:13px;color:var(--sub);white-space:nowrap}.course-label i{display:inline-block;width:4px;height:4px;background:var(--gold);border-radius:50%;margin:0 11px;vertical-align:middle}.top-tools{margin-left:auto;display:flex;align-items:center;gap:7px}.top-tools button{font-size:12px;padding:8px 11px}.status{display:flex;align-items:center;gap:7px;border-color:transparent;background:transparent}.dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--gold)}.sidebar{position:fixed;left:0;top:72px;bottom:0;width:183px;background:#efeee4;border-right:1px solid var(--line);padding:22px 13px;z-index:20;display:flex;flex-direction:column}.side-caption{font-size:11px;letter-spacing:.08em;color:var(--sub);margin:0 0 17px 9px}.sidebar nav{display:grid;gap:7px}.step{display:flex;align-items:center;gap:11px;text-align:left;border-color:transparent;background:transparent;padding:11px 10px;border-radius:9px}.step>span{font-family:SimSun,"宋体",serif;font-size:24px;color:#9ba198;min-width:26px}.step b{display:block;font-weight:400;font-size:14px}.step small{display:block;font-size:10px;color:#80877d;margin-top:5px}.step[aria-current=step]{background:var(--panel);border-color:#d5d9cc;box-shadow:0 4px 12px #33433308}.step[aria-current=step]>span{color:var(--wine)}.step[aria-current=step] b{font-weight:bold;color:var(--jade)}.side-bottom{margin-top:auto;padding:17px 10px 0;border-top:1px solid var(--line);display:grid;gap:6px}.side-bottom>span{font-size:10px;color:var(--sub)}.side-bottom>b{font:700 17px SimSun,"宋体",serif}.side-bottom small{font-size:10px;line-height:1.6;color:var(--sub)}.side-bottom button{margin-top:8px;padding:8px 10px;font-size:12px;text-align:left}.side-bottom button span{float:right}main{margin:72px 0 62px 183px;padding:27px clamp(22px,3.1vw,52px);height:calc(100vh - 134px);overflow:auto;scrollbar-width:thin}.footer{position:fixed;bottom:0;left:183px;right:0;height:62px;background:#fffdf7f7;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 30px;border-top:1px solid var(--line);z-index:25}.footer>span{font-size:12px;color:var(--sub)}.footer-actions{display:flex;align-items:center;gap:10px}.footer-actions button{font-size:13px;padding:9px 15px}#mini-timer{font-size:13px;color:var(--wine);font-variant-numeric:tabular-nums}.scene-head{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:18px}.scene-head .eyebrow{margin-bottom:0}.minute-label{font-size:12px;color:var(--sub);border-bottom:1px solid var(--line);padding-bottom:6px}.split{display:grid;grid-template-columns:minmax(300px,.95fr) minmax(340px,1.1fr);gap:clamp(25px,4vw,68px);align-items:center;min-height:calc(100% - 48px)}.intro-text{max-width:440px}.intro-text .lead{font-size:17px;line-height:1.9;color:#58645c;margin-bottom:22px}.inline{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.stack{display:grid;gap:8px}.choices{display:grid;gap:9px;margin:23px 0}.choices button{font-size:16px;padding:13px 17px;text-align:left}.choices button small{float:right;color:var(--sub);font-size:12px}.knowledge{border-top:1px solid #bdc9bb;margin-top:22px;padding-top:16px;color:var(--jade);font-size:16px;line-height:1.7}.knowledge strong{display:block;font-size:11px;letter-spacing:.15em;color:var(--gold);margin-bottom:6px}.knowledge[hidden]{display:none}.question-follow{font-size:13px;color:var(--sub);margin-top:17px}.art-stage{background:#e5e8dc;border:1px solid #d5dccc;border-radius:16px;min-height:430px;padding:20px;position:relative;display:flex;justify-content:center;align-items:center;flex-direction:column;gap:12px;overflow:hidden}.art-stage:before{content:"";position:absolute;border:1px solid #ffffff80;border-radius:50%;width:600px;height:600px;left:0;top:2%;pointer-events:none}.art-stage .plate{position:relative;z-index:1}.plate{margin:0;display:grid;justify-items:center;gap:10px}.plate figcaption{font-size:11px;letter-spacing:.04em;color:var(--sub)}.book{position:relative;aspect-ratio:105/148;width:min(100%,300px,31vw);max-height:calc(100vh - 252px);background:#fbf2df;box-shadow:8px 15px 25px #33443820;border:1px solid #d8cfba;isolation:isolate;overflow:hidden;container-type:inline-size;touch-action:none}.book:after{content:"";position:absolute;inset:0;pointer-events:none;z-index:9;box-shadow:inset 4px 0 6px #6c58460a;background-image:repeating-linear-gradient(95deg,transparent 0 3px,#a58b6310 3px 4px);opacity:.2}.book .sub-title{position:absolute;left:8%;top:5%;font-size:3.1cqw;letter-spacing:.08em;color:#4b564c;z-index:4}.book .book-title{position:absolute;width:83%;font:700 12cqw/1.16 SimSun,"宋体",serif;letter-spacing:.035em;white-space:pre-wrap;z-index:6;user-select:none;cursor:inherit;color:#172f43}.book .book-title.selected{outline:1px dashed var(--wine);outline-offset:5px}.book .book-title .drag-grip{position:absolute;right:-7px;bottom:-6px;width:10px;height:10px;background:white;border:1px solid var(--wine)}.book .imprint{position:absolute;left:8%;bottom:4.5%;font-size:2.6cqw;line-height:1.65;z-index:5;color:#5c6257}.book .imprint>b{font-family:SimSun,"宋体",serif;letter-spacing:.12em}.book 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b{font-size:60px}.pin{position:absolute;width:23px;height:23px;border-radius:50%;background:var(--wine);color:#fff;border:2px solid white;display:grid;place-items:center;font-size:11px;transform:translate(-50%,-50%);z-index:20;pointer-events:none}.pin.second{background:var(--jade)}.small-tools{display:flex;justify-content:center;gap:7px;flex-wrap:wrap;z-index:2}.small-tools button{font-size:12px;padding:7px 9px}.compare-scene h1{font-size:34px;max-width:760px;margin-bottom:10px}.compare-scene>p{font-size:15px;color:var(--sub)}.comparison-layout{display:grid;grid-template-columns:minmax(460px,1.6fr) minmax(245px,.8fr);gap:26px;align-items:start}.book-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding:18px 22px;background:#e7eadf;border:1px solid #d4dccd;border-radius:13px}.book-pair .book{width:min(100%,260px);max-height:calc(100vh - 330px)}.pair-note{font-size:11px;color:var(--sub);padding-top:7px;grid-column:span 2;text-align:center}.control-panel{padding-top:9px}.control-panel h3{font-size:18px;margin-bottom:12px}.control-panel p{font-size:14px}.range-label{display:block;font-size:13px;line-height:1.7;margin:15px 0}.range-label input{display:block;width:100%;accent-color:var(--jade);margin:13px 0}.value-pill{font-size:12px;padding:4px 8px;background:#e6ebdf;border-radius:5px;color:var(--jade);float:right}.ai-panel{margin-top:20px;border:1px solid #d3dacc;border-radius:10px;padding:13px;background:#eef1e6}.ai-head{display:flex;justify-content:space-between;gap:10px;align-items:center;font-size:13px;color:var(--jade)}.ai-tag{font-size:10px;color:#7c6b4c;border:1px solid #cabea3;border-radius:20px;padding:3px 7px;white-space:nowrap}.ai-panel p{font-size:13px;line-height:1.8;margin:10px 0}.ai-panel button{font-size:12px;padding:7px 9px}.ai-panel .small{font-size:11px;color:var(--sub)}.demo-layout{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}.demo-steps{display:grid;gap:8px;margin:24px 0}.demo-steps button{padding:12px 15px;text-align:left;display:flex;align-items:center;gap:14px;font-size:16px}.demo-steps button>span{font:24px SimSun,"宋体",serif;color:var(--gold)}.demo-steps button small{display:block;font-size:12px;line-height:1.6;color:var(--sub);margin-top:3px}.demo-stroke{position:absolute;inset:0;z-index:7;pointer-events:none}.demo-stroke path{stroke-dasharray:500;stroke-dashoffset:0;animation:pen 1.5s ease;fill:none;stroke:#8e3e49;stroke-width:2.2;stroke-linecap:round}@keyframes pen{from{stroke-dashoffset:500}to{stroke-dashoffset:0}}.work-scene{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center;min-height:calc(100% - 40px)}.timer-face{width:310px;height:310px;border-radius:50%;border:1px solid #cbd7c4;display:grid;place-content:center;text-align:center;background:radial-gradient(circle,#fffdf6 0 61%,#e4eadc 62% 66%,#edf0e5 67%);box-shadow:inset 0 0 0 12px 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#d5ddcd;border-radius:12px;display:grid;place-items:center;overflow:hidden;padding:16px;cursor:crosshair}.review-photo-inner{position:relative;display:inline-flex;max-width:100%;max-height:100%;line-height:0}.review-photo-inner>img{display:block;max-width:100%;max-height:calc(100vh - 345px);object-fit:contain}.review-photo-stage .image-label{position:absolute;bottom:8px;left:12px;background:#fffdf7e8;color:var(--sub);font-size:10px;line-height:1.4;padding:5px 8px;border-radius:5px}.review-panel .tabs{margin-bottom:17px}.review-panel .tabs button{padding:8px 10px;font-size:12px}.review-panel h3{font-size:18px;margin-bottom:8px}.review-panel p{font-size:14px}.review-panel .reading-options{display:flex;flex-wrap:wrap;gap:7px;margin:15px 0}.review-panel .reading-options button{font-size:13px;padding:8px 9px}.review-evidence{font-size:13px;line-height:1.7;border-top:1px solid var(--line);margin-top:14px;padding-top:12px}.review-evidence b{color:var(--jade)}.wall-head{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.wall-head h1{margin-bottom:9px}.wall-head .muted{margin-bottom:20px}.wall-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-top:8px}.wall-card{background:var(--panel);border:1px solid var(--line);border-radius:11px;padding:12px;min-width:0}.wall-card>button{border:0;padding:0;background:#e8eadf;width:100%;height:230px}.wall-card img{width:100%;height:100%;object-fit:contain}.wall-card h3{font-size:14px;margin:11px 0 5px}.wall-card p{font-size:11px;color:var(--sub);margin:0 0 10px}.wall-card .inline button{font-size:11px;padding:6px 7px}.wall-empty{margin-top:25px;border-top:1px solid var(--line);padding-top:22px}.wall-empty h3{font-size:18px}.reference-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.reference-mini button{display:grid;grid-template-columns:80px 1fr;gap:13px;align-items:center;text-align:left;padding:12px}.reference-mini img{width:80px;height:112px;object-fit:contain}.reference-mini b{display:block;font:18px SimSun,"宋体",serif;margin-bottom:7px}.reference-mini small{font-size:11px;color:var(--sub);line-height:1.6}.closing{margin-top:22px;display:flex;gap:18px;color:var(--jade);align-items:center;border-top:1px solid #ccd5c5;padding-top:15px}.closing span{font-size:13px}.closing b{font:24px SimSun,"宋体",serif}.toast{position:fixed;bottom:80px;left:calc(50% + 70px);transform:translateX(-50%);z-index:200;background:#254c43;color:#fffdf0;border-radius:8px;padding:13px 21px;font-size:14px;box-shadow:var(--shadow);max-width:85vw;line-height:1.6}dialog{padding:24px;border:1px solid #d2d6c6;border-radius:15px;background:var(--panel);color:var(--ink);box-shadow:0 25px 80px #172b2540;width:min(940px,94vw);max-height:92vh;overflow:auto}dialog::backdrop{background:#1b33275c;backdrop-filter:blur(4px)}.modal-top{display:flex;align-items:flex-start;justify-content:space-between;gap:18px;margin-bottom:18px}.modal-top 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img{display:block;object-fit:contain;width:100%;height:70px;margin-bottom:5px}.material-panel>.inline{margin-top:13px}.material-panel>.inline button,.file-button{font-size:12px;padding:8px 10px;display:inline-block}.lab-paper-area{display:grid;justify-items:center;padding:10px 12px;background:#e4e8dc;border-radius:12px}.lab-paper-area>.muted{font-size:10px;margin:10px 0}.lab-paper-area .book{width:min(100%,340px);max-height:57vh}.lab-paper-area label{font-size:11px}.lab-paper-area input{display:block;width:145px;padding:7px;border:1px solid var(--line);border-radius:5px;margin-top:4px;font-size:13px}.lab-paper-area>.inline{justify-content:center}.lab-paper-area .inline button{font-size:11px;padding:7px 9px}.layer-list{display:grid;gap:5px;max-height:22vh;overflow:auto;margin-bottom:12px}.layer-row{display:flex;align-items:center;gap:6px;padding:7px;background:#eeefe5;border:1px solid transparent;border-radius:5px;font-size:11px;text-align:left}.layer-row.active{border-color:var(--wine)}.layer-row img{width:30px;height:25px;object-fit:contain}.layer-row span{flex:1;min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.property-grid{display:grid;gap:8px}.property-grid label{font-size:11px;display:flex;align-items:center;gap:8px}.property-grid input,.property-grid select{flex:1;min-width:0;width:100%;accent-color:var(--jade)}.property-grid select{padding:6px;border:1px solid var(--line);border-radius:5px}.properties>.inline{margin-top:13px}.properties>.inline button{font-size:11px;padding:7px 9px}.swatches{display:flex;gap:8px}.swatches button{width:27px;height:27px;padding:0;border-radius:50%;border:1px solid #acae9c}.properties .text-button{font-size:11px}.compare-pair{display:grid;grid-template-columns:1fr 1fr;gap:20px;background:#e5e9dd;padding:20px;border-radius:12px}.compare-pair .book{width:245px;max-width:100%;max-height:60vh}body.printing #print-area{display:block!important}body.printing{background:white}.empty-state{display:grid;place-content:center;text-align:center;border:1px dashed #b7c6af;border-radius:10px;padding:28px;min-height:140px}.empty-state b{font:20px SimSun,"宋体",serif}.print-materials{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.print-materials figure{margin:0;border:1px dashed #aaa;padding:10px;text-align:center}.print-materials img{width:100%;height:115px;object-fit:contain}.print-materials figcaption{font-size:12px;margin-top:8px}.mini-boxes{display:flex;gap:14mm;margin:10mm 0}.mini-box{width:55mm;height:77mm;border:1px solid #777;position:relative}.mini-box b{position:absolute;top:3mm;left:3mm;font-size:10px;font-weight:normal}.print-task h1{font-size:24px}.print-task p{font-size:13px;line-height:2}.print-task .one-line{border-top:1px solid #999;padding-top:4mm;margin-top:7mm}
@media(min-width:1600px){.art-stage{min-height:540px}.book{width:min(100%,365px);max-height:calc(100vh - 280px)}.book-pair .book{width:310px}.comparison-layout{grid-template-columns:1.5fr .8fr}.intro-text{max-width:500px}.intro-text .lead{font-size:20px}.choices button{font-size:18px}.control-panel p{font-size:16px}.control-panel h3{font-size:21px}.review-photo-stage{min-height:430px}.review-photo-inner>img{max-height:calc(100vh - 355px)}}
@media(max-height:780px) and (min-width:951px){main{padding-top:19px}.scene-head{margin-bottom:13px}.art-stage{min-height:365px;padding:14px}.intro-text .lead{font-size:15px;line-height:1.7;margin-bottom:15px}.choices{gap:7px;margin:15px 0}.choices button{padding:10px 13px;font-size:14px}.knowledge{font-size:14px;margin-top:15px;padding-top:12px}.sidebar{padding-top:15px}.sidebar .step{padding:9px}.side-bottom{padding-top:12px}.side-bottom small{display:none}.book-pair .book{max-height:calc(100vh - 308px)}.demo-steps{margin:16px 0}.demo-steps button{padding:9px 12px}.review-layout{grid-template-columns:110px minmax(270px,1fr) minmax(225px,.85fr)}.review-panel p{font-size:12px}.review-panel h3{font-size:16px}.review-panel .ai-panel{margin-top:12px;padding:10px}.review-panel .ai-panel p{font-size:12px}.timer-face{width:260px;height:260px}.timer-face time{font-size:58px}.timer-face .timer-top{top:32px}.wall-card>button{height:185px}}
@media(max-width:1100px){.course-label{display:none}.sidebar{width:159px}.step{gap:8px}.step b{font-size:12px}.step>span{font-size:21px}.side-caption{font-size:10px}main{margin-left:159px;padding:22px}.footer{left:159px;padding:0 20px}.split{gap:24px;grid-template-columns:minmax(260px,1fr) minmax(265px,1fr)}.comparison-layout{grid-template-columns:minmax(350px,1.5fr) minmax(220px,1fr);gap:19px}.book-pair{gap:14px;padding:15px}.book-pair .book{width:220px}.review-layout{grid-template-columns:90px minmax(250px,1fr) minmax(210px,.9fr);gap:13px}.reference-mini{gap:10px}.reference-mini button{grid-template-columns:60px 1fr}.reference-mini img{width:60px;height:90px}.reference-mini b{font-size:16px}.lab-layout{grid-template-columns:230px 1fr 210px;gap:14px}}
@media(max-width:950px){.top{height:62px;padding:0 15px}.brand{min-width:160px}.brand b{font-size:17px}.brand small{font-size:9px}.top-tools{gap:4px}.top-tools button{padding:7px 9px;font-size:11px}.top-tools .status{display:none}.sidebar{top:62px;bottom:auto;width:100%;height:65px;border-right:0;border-bottom:1px solid var(--line);padding:5px 8px}.side-caption,.side-bottom{display:none}.sidebar nav{display:flex;gap:4px;overflow:auto}.step{min-width:112px;padding:7px 9px;gap:7px}.step>span{font-size:22px}.step b{font-size:12px}.step small{font-size:9px}.footer{left:0;height:58px;padding:0 15px}.footer>span{display:none}.footer-actions{width:100%;justify-content:flex-end}main{margin:127px 0 58px;padding:20px;height:auto;min-height:calc(100vh - 185px);overflow:visible}.split{grid-template-columns:1fr 1fr;gap:20px;min-height:0}.book{width:260px;max-height:unset}.art-stage{min-height:385px;padding:15px}.intro-text .lead{font-size:15px}.choices button{font-size:14px}.comparison-layout{grid-template-columns:1fr}.book-pair{max-width:650px;margin:auto;width:100%}.book-pair .book{max-height:unset;width:min(100%,240px)}.control-panel{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}.control-panel>.knowledge{grid-column:1/-1}.control-panel>.ai-panel{grid-column:2;grid-row:1/5}.review-layout{grid-template-columns:95px 1fr}.review-panel{grid-column:1/-1;display:block}.review-photo-stage{height:450px}.review-photo-inner>img{max-height:410px}.photo-list{max-height:450px}.wall-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.reference-mini{grid-template-columns:1fr}.reference-mini button{grid-template-columns:75px 1fr}.lab-layout{grid-template-columns:200px 1fr}.properties{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:12px 20px}.properties>.eyebrow{grid-column:1/-1;margin-bottom:0}.properties>.layer-list{grid-column:1}.properties>.property-grid{grid-column:2;grid-row:2}.properties>.inline{margin-top:0}.properties>.muted{margin:0}.properties h4{margin:0}.lab-paper-area .book{max-height:unset;width:280px}.material-tray{max-height:440px}.work-scene{gap:28px}.timer-face{width:260px;height:260px}.timer-face time{font-size:60px}}
@media(max-width:600px){.top-tools button:first-child{display:none}.brand{min-width:140px}.logo-crop{transform:scale(.85);margin-right:-6px}.top-tools button{font-size:10px;padding:7px}.split,.demo-layout,.work-scene{grid-template-columns:1fr;gap:22px}.intro-text{max-width:none}h1{font-size:32px}.scene-head .minute-label{font-size:10px}.eyebrow{font-size:10px}.art-stage{min-height:350px}.art-stage .book{width:235px}.choices{margin:15px 0}.choices button{font-size:14px}.compare-scene h1{font-size:29px}.book-pair{padding:14px 10px;gap:10px}.book-pair .book{width:100%}.plate figcaption{font-size:10px}.control-panel{display:block}.review-top{display:block}.review-top>.inline{margin:10px 0}.review-layout{grid-template-columns:70px 1fr;gap:9px}.photo-thumb{padding:4px}.photo-thumb img{height:70px}.review-photo-stage{padding:8px;height:350px;min-height:300px}.review-photo-inner>img{max-height:315px}.photo-list{max-height:350px}.review-panel{grid-column:1/-1}.wall-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.wall-card{padding:8px}.wall-card>button{height:175px}.wall-head{display:block}.closing{flex-wrap:wrap}.reference-layout{grid-template-columns:1fr}.reference-art{max-width:280px;margin:auto}.reference-note{min-height:0;font-size:16px}.modal{padding:18px}.modal h2{font-size:24px}.lab-layout{grid-template-columns:1fr}.material-panel{order:2}.lab-paper-area{order:1}.properties{order:3;display:block}.properties>div{margin-top:12px}.lab-paper-area .book{width:250px}.material-tray{max-height:300px;grid-template-columns:repeat(4,1fr)}.material-tray img{height:60px}.lab .modal-top{display:block}.lab .modal-top>div:last-child{margin-top:10px}.compare-pair{gap:10px;padding:10px}.compare-pair .book{width:100%}.guide-flow>div{grid-template-columns:80px 1fr}.task-lines{margin:16px 0}.task-line{font-size:14px}.work-scene .intro-text{order:1}.work-scene .timer-area{order:2}.top-tools #full{display:none}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}[hidden]{display:none!important}
@media print{@page{size:A4;margin:10mm}body>*:not(#print-area){display:none!important}#print-area{display:block!important;font-family:SimSun,"宋体",serif;color:black}#print-area>img{display:block;max-width:100%;max-height:275mm;margin:auto;object-fit:contain}.print-materials img{height:45mm}.print-materials figure{break-inside:avoid}.print-materials{gap:5mm}.print-task .mini-box{height:77mm}.print-task h1{font-family:SimHei,"黑体",sans-serif}}

/* Keep teacher demonstration covers legible inside the presentation stage. */
.art-stage>.plate{width:100%}.art-stage .book{width:min(300px,100%,calc((100vh - 280px)*.70946));max-height:none}.lab-paper-area>#lab-paper{width:100%;display:grid;justify-items:center}.lab-paper-area .book{width:min(100%,320px);max-height:none}
@media(max-width:950px){.art-stage .book{width:260px}}
@media(max-width:600px){.art-stage .book{width:235px}.lab-paper-area .book{width:250px}}