:root{--paper:#f5f2e9;--white:#fffdf8;--ink:#292d27;--muted:#7e8276;--olive:#626d4c;--orange:#c97e3c;--line:#e3e2d7;--green:#e9eddf;--red:#ac5340;--shadow:0 8px 35px #464d3610}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:14px/1.65 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft Yahei",sans-serif}button,input,textarea{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.48}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #d6aa6c;outline-offset:3px}a{color:inherit;text-decoration:none}button{color:inherit}h1,h2,h3,p{margin:0}.topbar{height:88px;background:#fffdf9;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 32px;gap:24px}.brand{display:flex;align-items:center;gap:13px;font:600 20px/1.35 "Songti SC","SimSun",serif;white-space:nowrap}.brand small{display:block;font:10px/1.8 -apple-system,sans-serif;letter-spacing:1.3px;color:var(--muted);margin-top:5px}.seal{display:grid;place-items:center;width:39px;height:43px;border:1px solid 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.step-number{background:var(--olive);border-color:var(--olive);color:white}.step-button.complete .step-number{color:var(--olive);background:#e6eadc}.step-button:disabled{opacity:.48}.journey-progress{margin-top:auto;padding:0 13px}.journey-progress>div:first-child{display:flex;justify-content:space-between;font-size:11px;color:#7b836a}.journey-progress strong{font-weight:500}.progress-track{height:4px;background:#dbdfce;border-radius:5px;margin:9px 0}.progress-track i{display:block;background:var(--olive);height:100%;border-radius:5px;transition:width .4s}.journey-progress small{font-size:9px;color:#a0a48f}.workspace{padding:30px 34px 24px;min-width:0}.heading-row{display:flex;justify-content:space-between;align-items:center;margin-bottom:23px}.heading-row h1{font:500 31px/1.4 "Songti SC","SimSun",serif;margin:8px 0 9px;letter-spacing:2px}.lead{font-size:12px;color:#8b8d7c}.step-count{font:italic 31px Georgia,serif;color:#bcc0ae;white-space:nowrap;margin-left:20px}.step-count small{font-size:14px;color:#a8ae98}.experience-grid{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:18px}.stage-card,.task-card,.quiz-card{background:var(--white);border:1px solid var(--line);border-radius:9px;overflow:hidden;box-shadow:var(--shadow)}.stage-toolbar{height:49px;display:flex;align-items:center;justify-content:space-between;padding:0 17px;gap:10px}.view-tabs{display:flex;gap:17px}.view-tabs button{background:none;border:0;font-size:11px;color:#a3a492;height:49px;padding:0;position:relative}.view-tabs button.active{color:var(--olive);font-weight:600}.view-tabs button.active:after{content:"";position:absolute;bottom:0;left:0;right:0;height:2px;background:var(--olive)}.media-label{font-size:9px;color:#a38d6d;background:#f3eddf;padding:3px 7px;border-radius:3px}.stage{height:352px;position:relative;background:radial-gradient(ellipse at 45% 25%,#f6f0dd,#e8e6d7 76%);isolation:isolate;overflow:hidden}#scene,#image-view,#stage-overlay{position:absolute;inset:0}#scene canvas{width:100%;height:100%;display:block;touch-action:none}#image-view{display:none;background-size:cover;background-position:center}#image-view:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 55%,#101d16aa)}#image-view video{width:100%;height:100%;object-fit:contain;background:#18201a}#stage-overlay{pointer-events:none}#stage-overlay button{pointer-events:auto}.hotspot{position:absolute;display:flex;align-items:center;gap:7px;background:#fffdf9e8;backdrop-filter:blur(8px);padding:6px 10px;border:1px solid #ded9c2;border-radius:24px;font-size:10px;box-shadow:0 3px 12px 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#1f2c3040}dialog::backdrop{background:#28352b72;backdrop-filter:blur(4px)}.modal-head{display:flex;align-items:start;justify-content:space-between;margin-bottom:20px}.modal-head h2{font:500 25px "Songti SC",serif;margin-top:6px}.icon-button{border:0;background:#f0f0e6;border-radius:50%;height:30px;width:30px;font-size:23px;color:#7a8568}.modal-intro{font-size:12px;color:#8e937f;margin-bottom:16px;line-height:1.9}.asset-table{border-collapse:collapse;font-size:11px;width:100%}.asset-table td,.asset-table th{padding:12px 9px;text-align:left;border-bottom:1px solid #e4e5d9;vertical-align:top}.asset-table th{color:#90987e;font-weight:500;font-size:10px}.asset-id{color:#a4ac91;font:10px monospace}.asset-table strong{font-weight:500}.asset-table code{font-size:10px;background:#f0f1e9;padding:2px 4px;border-radius:3px}.modal-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}.modal-actions button{width:auto}.record-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:15px 0}.stat{background:#f0f2e8;padding:17px;border-radius:6px;text-align:center}.stat strong{display:block;font:30px Georgia,serif;color:#63734d}.stat span{font-size:10px;color:#929a80}.record-row{display:flex;justify-content:space-between;gap:12px;padding:11px 0;border-bottom:1px solid #e6e7dc;font-size:12px}.record-row span{font-size:10px;color:#939d80}.note-preview{white-space:pre-wrap;background:#f4f3e9;padding:15px;border-radius:5px;color:#777f68;font-size:12px;margin-top:15px}.resource-links{display:flex;gap:15px;font-size:10px;color:#82916c;margin-top:20px;flex-wrap:wrap}.resource-links a{text-decoration:underline}.year-strip{display:flex;gap:7px}.year-button{flex:1;text-align:center}.review-item{font-size:11px;border-bottom:1px solid #e5e7d9;padding:8px 0;color:#7c8769}.review-item:before{content:"✓";color:#7d9161;margin-right:7px}#toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%) translateY(30px);padding:10px 20px;background:#4b5b3eea;color:#fffdf4;border-radius:7px;font-size:12px;opacity:0;pointer-events:none;transition:.25s;z-index:20}#toast.visible{opacity:1;transform:translateX(-50%) translateY(0)}.finished-banner{padding:15px;background:#edf1e3;border-radius:7px;margin-bottom:15px;color:#617149;font-size:12px}.chip{display:inline-block;font-size:9px;background:#ecefe2;color:#879471;border-radius:3px;padding:2px 5px}.inline-danger{background:transparent;border:1px solid #dfc7b7;padding:9px 13px;border-radius:5px;color:#a47d61;font-size:11px}.sort-row{background:#f5f4ea;padding:10px;border-radius:5px;margin-top:10px;font-size:11px}.sort-row .action-stack{margin-top:7px;flex-direction:row}.sort-row button{flex:1;text-align:center}.sample-badge{width:16px;height:16px;border-radius:50%;background:#dfa64f;display:inline-block;vertical-align:middle;margin-right:6px}.sample-badge.bad{background:radial-gradient(circle at 70% 20%,#6b6d43 10%,#b88e3f 15%,#c69c47 60%)}
@media(min-width:1600px){.workspace{padding:37px 48px}.stage{height:420px}.experience-grid{grid-template-columns:minmax(0,1fr) 320px}.task-card{padding:27px}.lead{font-size:13px}.stage-card .stage-footer{height:47px}}
@media(max-width:1200px){.topbar{padding:0 21px;gap:14px}.chapter-nav{gap:16px}.header-actions{gap:12px}.prototype-tag{display:none}.shell{grid-template-columns:210px minmax(0,1fr)}.sidebar{padding:28px 12px}.workspace{padding:25px 22px}.experience-grid{grid-template-columns:minmax(0,1fr) 257px;gap:13px}.stage{height:355px}.task-card{padding:18px 17px}.media-label{font-size:8px}.brand{font-size:18px}.bottom-row{align-items:flex-end}.batch-note small{max-width:230px}.heading-row h1{font-size:29px}}
@media(max-width:980px){.header-actions #assets-button{display:none}.brand small{font-size:9px;letter-spacing:0}.chapter-nav{gap:10px}.chapter-nav button{font-size:12px}.shell{grid-template-columns:180px minmax(0,1fr)}.sidebar-intro{padding:0 9px}.sidebar h2{font-size:20px}.sidebar .eyebrow{font-size:7px;letter-spacing:1px}.step-button{padding:9px;font-size:11px;gap:7px}.workspace{padding:24px 19px}.experience-grid{grid-template-columns:1fr}.stage{height:330px}.task-card{padding:20px}.task-card .action-stack{display:grid;grid-template-columns:1fr 1fr}.task-card>p{margin-bottom:12px}.section-label{margin-bottom:8px}.quiz-card{padding:20px}.stage-toolbar{height:45px}.view-tabs button{height:45px}}
@media(max-width:680px){.topbar{height:auto;min-height:116px;flex-wrap:wrap;padding:16px 18px 0;gap:12px}.brand{font-size:18px}.seal{width:32px;height:37px;font-size:22px}.brand small{font-size:8px}.header-actions{margin-left:auto}.chapter-nav{order:3;width:100%;justify-content:space-around;height:40px}.chapter-nav button{flex:1}.shell{display:block}.sidebar{padding:12px 16px;border:0;border-bottom:1px solid var(--line);gap:0;display:block}.sidebar-intro,.steps,.journey-progress small{display:none}.journey-progress{padding:0}.progress-track{margin:6px 0 0}.workspace{padding:22px 15px}.heading-row{margin-bottom:18px}.heading-row h1{font-size:27px;letter-spacing:1px}.lead{font-size:11px}.step-count{font-size:25px;margin-left:10px}.stage{height:310px}.media-label{font-size:8px}.view-tabs{gap:15px}.task-card .action-stack{display:flex}.answer-options{grid-template-columns:1fr}.quiz-heading h2{font-size:17px}.quiz-state{font-size:8px}.bottom-row{flex-direction:column;align-items:stretch;margin-top:18px}.primary-button{justify-content:center}.batch-note small{max-width:none;font-size:8px}.stage-footer{font-size:9px}.stage-footer .text-button{font-size:9px}.stage-diagram{inset:20px 35px 44px}.record-stats{gap:6px}.stat{padding:12px 4px}.stat strong{font-size:25px}.hotspot{font-size:9px;padding:5px 7px}dialog{padding:20px}.asset-table td{padding:10px 5px}.asset-table td:first-child{width:25%}.asset-table td:last-child{display:none}.stage-toolbar{padding:0 13px}.quiz-heading .eyebrow{font-size:7px}.heading-row .eyebrow{font-size:8px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
@media(max-width:680px){#scene-caption strong{font-size:16px;letter-spacing:2px;max-width:67%}#scene-caption>span{font-size:8px;max-width:28%;text-align:right}}