:root{--navy:#102638;--deep:#0b1c2a;--teal:#138981;--mint:#4dd7bc;--orange:#ed7545;--text:#253949;--muted:#778794;--line:#e6ebef;--paper:#f6f8fa;--white:#fff;--side:235px;--panel:356px;--header:76px;--footer:40px;font-family:Inter,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;color:var(--text);font-synthesis:none}*{box-sizing:border-box}body{margin:0;background:var(--paper);font-size:13px;overflow:hidden}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button{transition:background .18s,color .18s,box-shadow .18s,transform .18s}button:disabled{cursor:not-allowed;opacity:.48}button:focus-visible,a:focus-visible{outline:3px solid 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var(--panel);height:calc(100dvh - var(--header) - var(--footer));min-height:450px;overflow:hidden}.step-sidebar{background:#f7f9fb;display:flex;flex-direction:column;border-right:1px solid #dfe6ea;min-width:0;z-index:4}.sidebar-head{padding:26px 22px 18px}.eyebrow{font-size:9px;letter-spacing:1.7px;color:#8498a4;font-weight:650}.sidebar-head h2{font-size:19px;font-weight:650;margin:7px 0 19px}.progress-meta{display:flex;justify-content:space-between;font-size:10px;color:var(--muted)}.progress-meta b{color:var(--teal);font-weight:650}.progress-track{height:4px;background:#e2e9ec;border-radius:5px;margin-top:9px;overflow:hidden}.progress-track i{display:block;background:var(--teal);height:100%;width:0;transition:width .4s}.step-list{overflow-y:auto;flex:1;padding:0 11px 18px;scrollbar-width:thin;scrollbar-color:#d3dce0 transparent}.module-title{display:flex;justify-content:space-between;align-items:center;padding:15px 10px 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#aebfc8;border-top-color:var(--teal);animation:spin 1s linear infinite}.scene-loading small{color:#95a5b0}@keyframes spin{to{transform:rotate(360deg)}}.scene-top{position:absolute;top:24px;left:24px;right:24px;display:flex;justify-content:space-between;pointer-events:none;gap:10px}.scene-title{display:flex;align-items:center;gap:9px;color:#254b5b}.live-dot{display:inline-block;width:6px;height:6px;background:#2ac3a6;border-radius:50%;box-shadow:0 0 0 4px #2ac3a618;flex-shrink:0}.scene-title b{font-size:15px;font-weight:650;display:block}.scene-title small{display:block;font-size:8px;letter-spacing:1.4px;margin-top:5px;color:#66838e}.scene-badge{font-size:8px;background:#ffffff9e;border:1px solid #fff8;border-radius:3px;padding:4px 6px;margin:0 0 10px 6px;color:#6b8793;white-space:nowrap}.scene-buttons{display:flex;gap:7px;pointer-events:auto}.scene-btn{width:32px;height:32px;display:grid;place-items:center;background:#ffffffc4;border:1px solid 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svg{width:13px;height:13px}.next-button:not(:disabled){color:var(--teal)}.validation-result{font-size:10px;line-height:1.7;max-height:130px;overflow:auto}.validation-result:not(:empty){margin-bottom:12px;padding:10px 11px;background:#eff7f2;color:#397f64;border-radius:4px}.validation-result.error{background:#fff1eb;color:#b56a4c}.validation-result b{display:block;margin-bottom:3px}.bottom-bar{height:var(--footer);background:white;border-top:1px solid #dfe5e9;display:flex;align-items:center;justify-content:space-between;padding:0 23px;font-size:9px;color:#8a9ba7;position:relative;z-index:6;gap:10px}.bottom-bar>div{display:flex;align-items:center;gap:8px}.bottom-mark{display:inline-block;width:5px;height:5px;border-radius:1px;background:var(--teal)}.muted-separator{color:#c5cfd5;margin:0 3px}.bottom-info{gap:22px!important}.bottom-info>span:nth-child(2){color:var(--teal)}.bottom-info button{display:flex;align-items:center;gap:5px;color:#7d919e;font-size:9px;padding:0}.bottom-info 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#e1eaed;border-radius:5px;text-align:left;justify-content:space-between;padding:10px 12px;color:#5b7a89;margin-bottom:8px;font-size:10px;line-height:1.8}.question-button svg{width:12px;height:12px;margin-top:3px}.chat-input{display:flex;gap:7px;margin-top:20px}.chat-input input{width:100%;border:1px solid #dce7eb;border-radius:4px;font-size:10px;padding:9px}.chat-input button{background:var(--teal);color:white;border-radius:4px;padding:0 9px}.chat-input svg{width:14px}.guide-response{font-size:10px;line-height:1.9;padding:13px;background:#ecf7f2;color:#4b7c6d;border-radius:5px;margin:13px 0}.report-btn{margin-top:12px}.toast{position:fixed;bottom:60px;left:50%;transform:translate(-50%,20px);background:#15394aed;border:1px solid #ffffff1f;color:white;z-index:30;font-size:11px;line-height:1.7;padding:11px 20px;border-radius:6px;box-shadow:0 6px 30px 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input{accent-color:var(--teal)}.warning-banner{border-left:3px solid #e59762;background:#fff6ed;padding:11px 13px;font-size:10px;color:#ad7c55;line-height:1.8;margin:14px 0}.metric-breakdown{font-size:9px;color:#8aa0aa;border-top:1px solid #e2ebef;padding-top:9px;margin:8px 0;line-height:1.9}.toggle-menu{display:none}.mobile-task-toggle{display:none}
@media(min-width:1700px){:root{--side:260px;--panel:390px;--header:84px}.task-content,.guide-content{padding:28px}.task-description{font-size:12px}.zone-card{font-size:11px;padding:13px 10px}.step-item{font-size:12px;padding:10px}.sidebar-head{padding:30px 24px 22px}.scene-title b{font-size:17px}.scene-message b{font-size:12px}.scene-message span:not(.hint-icon){font-size:10px}.intro-content{left:8%}.intro-content h1{font-size:60px}.intro-desc{font-size:14px}}
@media(max-width:1200px){:root{--side:200px;--panel:320px;--header:68px;--footer:35px}.topbar{padding:0 20px}.school{display:none}.header-right{min-width:100px}.brand{min-width:220px}.topbar nav{gap:23px}.task-content,.guide-content{padding:20px 18px}.task-footer{padding:12px 18px}.sidebar-head{padding:22px 17px 16px}.step-item{gap:7px;font-size:10px}.scene-footer>span:first-child{font-size:7px;gap:3px}.scene-footer{left:15px;right:15px}.scene-message{left:16px;right:160px;padding:10px;gap:8px}.scene-message b{font-size:10px}.scene-message span:not(.hint-icon){font-size:8px}.mini-map{width:124px;right:16px}.scene-top{left:18px;right:18px;top:20px}.view-switch{left:18px}.scene-badge{display:none}.zone-label{font-size:9px;padding:6px 7px}.intro-content{left:6%}.intro-content h1{font-size:43px}.intro-subtitle{font-size:16px}.bottom-bar{font-size:8px;padding:0 17px}.bottom-info{gap:12px!important}}
@media(max-width:1000px){:root{--side:176px;--panel:300px}.step-item{font-size:9px;padding:8px 6px;gap:5px}.module-title{font-size:9px;padding-left:7px;padding-right:7px}.sidebar-head h2{font-size:17px}.sidebar-head{padding:19px 14px 13px}.step-list{padding:0 8px 10px}.step-item.current:before{left:-8px}.sidebar-footer{padding:10px 8px;font-size:8px}.task-content h2{font-size:18px}.task-tabs{padding:0 18px}.scene-message{right:16px;bottom:46px}.mini-map{display:none}.scene-footer>span:first-child{display:none}.scene-footer{justify-content:flex-end}.view-switch button{padding:5px 8px;font-size:8px}.scene-title b{font-size:12px}.scene-title small{font-size:7px;letter-spacing:.8px}.scene-buttons{gap:4px}.scene-btn{width:27px;height:27px}.intro-content h1{font-size:38px}.intro-desc{font-size:11px}.intro-scene-caption{right:3%;font-size:9px}.intro-scene-caption>span:last-child{display:none}.bottom-bar>div:first-child{max-width:400px;white-space:nowrap;overflow:hidden}.bottom-info>span:first-child{display:none}}
@media(max-width:760px){:root{--header:61px;--footer:34px;--panel:310px}.topbar{padding:0 15px}.brand{font-size:21px;min-width:0;gap:8px}.brand-icon{width:31px;height:35px;border-radius:6px}.brand-icon svg{width:23px;height:23px}.brand small{font-size:8px;letter-spacing:1px;margin-top:5px}.topbar nav{gap:14px}.nav-item{font-size:11px;padding:0 1px}.header-right{display:none}.workspace:not(.intro-mode){display:grid;grid-template-columns:1fr 310px;grid-template-rows:1fr;min-height:380px}.step-sidebar{display:none}.simulation{min-height:250px}.scene-top{top:14px;left:12px;right:12px;gap:6px;flex-wrap:wrap}.scene-title b{font-size:11px}.scene-title small{display:none}.scene-title{gap:6px}.scene-buttons{margin-left:auto}.view-switch{left:12px;top:57px;gap:0}.view-switch button{padding:4px 6px;font-size:8px}.scene-message{left:10px;right:10px;bottom:40px;padding:9px}.hint-icon{display:none}.scene-message b{font-size:9px}.scene-message span:not(.hint-icon){font-size:8px}.scene-footer{left:8px;right:8px;font-size:7px}.intro-content{left:8%;top:46%;max-width:85%}.intro-content h1{font-size:36px;letter-spacing:1px}.intro-subtitle{font-size:15px;letter-spacing:7px;margin:13px 0 20px}.intro-kicker{font-size:9px;margin-bottom:20px}.intro-meta{margin:24px 0 25px;gap:25px}.intro-meta>div{padding-right:25px}.intro-meta strong{font-size:25px}.intro-desc{font-size:11px}.entry-note{font-size:8px}.intro-mode .scene-vignette{background:linear-gradient(90deg,#0a202ee6,#123342a3 75%,#193d4866),linear-gradient(0deg,#0d2639bb,transparent 33%)}.intro-scene-caption{bottom:20px;right:8%;font-size:8px}.intro-scene-caption b{font-size:8px}.bottom-bar>div:first-child{font-size:7px;max-width:53vw}.bottom-info{gap:10px!important}.bottom-info button{font-size:8px}.bottom-info>span:nth-child(2){font-size:8px}.modal-grid{grid-template-columns:1fr}.modal-head{padding:18px 20px}.modal-body{padding:20px}.modal-head h2{font-size:18px}.report-stats{gap:18px;padding:15px}.report-stats b{font-size:23px}.report-table th,.report-table td{font-size:9px}.task-kicker:before{content:""}.task-content{padding:18px 17px}.task-footer{padding:12px 17px}.zone-label{font-size:8px;padding:5px}.scene-message{max-height:78px;overflow:hidden}}
@media(max-width:560px){body{overflow:auto}.workspace:not(.intro-mode){display:flex;flex-direction:column;height:calc(100dvh - var(--header) - var(--footer));min-height:550px}.workspace:not(.intro-mode) .simulation{height:40%;min-height:210px;flex-shrink:0}.workspace:not(.intro-mode) .task-panel{height:60%;border-left:0;border-top:1px solid #d6e1e7}.task-tabs{height:41px;gap:25px}.task-tabs button{font-size:10px}.task-content,.guide-content{padding:15px 20px}.task-content h2{font-size:17px;margin:6px 0}.task-description{font-size:10px;margin-bottom:12px}.objective{margin-bottom:13px;padding:8px 10px;font-size:9px}.section-label{margin:13px 0 9px;font-size:10px}.zone-list{grid-template-columns:repeat(3,1fr);gap:6px}.zone-card{font-size:9px;padding:8px 6px;gap:5px}.zone-detail{padding:10px;margin-top:10px}.task-footer{padding:10px 20px;display:flex;flex-wrap:wrap;gap:8px}.task-footer .primary{width:65%;padding:10px;font-size:10px}.task-footer .next-button{width:calc(35% - 8px);padding:0;font-size:10px}.validation-result{width:100%;max-height:80px;font-size:9px}.validation-result:not(:empty){margin-bottom:0;padding:7px 10px}.scene-title small{display:block;font-size:6px}.scene-message{bottom:12px;left:12px;right:140px;max-height:50px;padding:7px;line-height:1.5}.scene-message b{font-size:9px;margin-bottom:2px}.scene-message span:not(.hint-icon){font-size:7px;display:none}.scene-footer{bottom:13px}.view-switch{top:49px;padding:2px}.zone-label{font-size:8px;padding:4px 5px}.zone-label i{width:4px;height:4px}.intro-mode{height:calc(100dvh - var(--header) - var(--footer));min-height:550px}.intro-content{top:46%;left:7%}.intro-content h1{font-size:31px}.intro-kicker{font-size:8px;letter-spacing:2px}.intro-subtitle{font-size:14px}.intro-meta{gap:21px}.intro-meta>div{padding-right:21px}.start-button{min-width:160px;font-size:12px;padding:14px 18px}.intro-secondary{font-size:10px}.entry-actions{gap:8px}.intro-desc{font-size:10px}.topbar nav{gap:9px}.nav-item{font-size:9px}.nav-dot{display:none}.brand small{font-size:7px}.bottom-bar>div:first-child{max-width:45vw;font-size:6px}.bottom-bar{padding:0 10px}.bottom-info button{font-size:7px}.bottom-info>span:nth-child(2){font-size:7px}.report-actions{flex-wrap:wrap}.report-actions .primary{font-size:10px}.field-label{font-size:10px}dialog{max-height:90dvh;width:94vw}.report-table td:first-child{min-width:95px}.report-table td{line-height:1.6}.intro-scene-caption{left:7%;right:auto;font-size:7px}.order-row{font-size:10px}.step-jump{display:flex!important}}
.step-sidebar,.task-panel{min-height:0;height:100%;overflow:hidden}.step-list,.task-content,.guide-content{min-height:0}.workspace:not(.intro-mode) .simulation{min-height:0}
@media(max-width:560px){.workspace:not(.intro-mode) .simulation{min-height:210px}.workspace:not(.intro-mode) .task-panel{height:60%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}

/* Photo-led factory revision: calm glass instruments over an industrial hall. */
.simulation{background:#a3aaa0}.scene-vignette{box-shadow:inset 0 0 100px #292d2530;background:linear-gradient(180deg,#24352b26,transparent 25%,transparent 82%,#25322723)}
.scene-top{top:18px;left:20px;right:20px}.scene-title{background:#f4f5edec;border:1px solid #f8f8f2b0;padding:9px 11px;border-radius:5px;box-shadow:0 4px 14px #1c2a2320;color:#354b42;gap:8px}.scene-title b{font-size:12px}.scene-title small{font-size:7px;color:#73877c;letter-spacing:1.1px}.scene-badge{margin:0 0 9px 3px;background:#e4eee6;border:0;color:#6a8876;font-size:7px;padding:3px 5px}.scene-buttons{align-items:flex-start}.scene-btn{background:#f7f8f0ed;border-color:#fff9;color:#5b7065;height:34px;width:34px;box-shadow:0 3px 9px #1e2b221f}
.view-switch{top:88px;left:20px;background:#f3f4e9e8;border:1px solid #fff9;padding:3px;box-shadow:0 3px 12px #1c2a2317}.view-switch button{font-size:9px;color:#64796c}.view-switch button.selected{color:#257e69;background:#fdfef7}
.camera-presets{position:absolute;left:20px;top:131px;display:flex;gap:4px;padding:3px;border-radius:5px;background:#15271ed4;border:1px solid #f9fff333;box-shadow:0 3px 12px #102b261c}.camera-presets button{font-size:9px;padding:7px 10px;border-radius:3px;color:#d5e0d4}.camera-presets button.selected{color:#203b2c;background:#e6e9dc}.camera-presets button:hover{background:#ffffff29;color:white}.camera-presets button.selected:hover{background:#f6f8ed;color:#203b2c}
.scene-tools{position:absolute;top:87px;right:20px;display:flex;flex-direction:column;gap:6px}.scene-tools button{font-size:9px;padding:8px 10px;min-width:88px;border-radius:4px;display:flex;align-items:center;justify-content:center;gap:5px;background:#f8f8efea;border:1px solid #fff8;color:#5c7062;box-shadow:0 3px 10px #132a1b13}.scene-tools button:hover{background:#fffef6}.scene-tools svg{width:12px;height:12px}.scene-tools button.on{color:#376f57}
.scene-status{position:absolute;left:20px;bottom:159px;display:flex;align-items:center;gap:6px;font-size:8px;letter-spacing:.4px;color:#e3e9dc;background:#15271de0;padding:7px 9px;border-radius:3px;border:1px solid #eef4df29;pointer-events:none}.scene-status>i{width:4px;height:4px;background:#b0cc8c;border-radius:50%}.scene-status>small{font-size:7px;color:#b2c4ad;border-left:1px solid #cde0bd33;padding-left:7px;margin-left:2px}
.scene-message{background:#f8f8f0f0;border-color:#fff9;box-shadow:0 5px 24px #223b2d23;bottom:65px}.scene-message b{color:#344a3e}.scene-message span:not(.hint-icon){color:#809082}.hint-icon{color:#4d876f}.scene-footer{color:#e1e7db;text-shadow:0 1px 5px #263225}.scene-footer kbd{color:#e3ebdf;background:#2436277a;border-color:#dbead94a}.mini-map{background:#f5f5eae6;border-color:#fff9;box-shadow:0 5px 15px #1b321e22}.zone-label{background:#f6f7eced;color:#3e5849;border-color:#f5f5ecf0;font-size:9px;box-shadow:0 4px 12px #1b302d25;padding:6px 8px}.zone-label.active{background:#287c63;border-color:#90b49b}.zone-label.active i{background:#d6e9bf}.zone-label i{background:#b28d35}.zone-label:after{height:10px;bottom:-10px;background:#b6c7ae8c}
.intro-mode .scene canvas{opacity:1}.intro-mode .scene-vignette{background:linear-gradient(90deg,#0b211ef2 0%,#0b211ee6 24%,#0d2821b3 44%,#17291c3d 73%,#19291a24),linear-gradient(0deg,#0a201cc7,transparent 38%)}.intro-content h1{font-weight:550}.intro-kicker{color:#b3d5b9}.intro-content .intro-desc{color:#afc2b3}.intro-meta>div>span{color:#95ad9c}.entry-note{color:#95ad9d}.intro-secondary{color:#c1d2c4}.intro-scene-caption{color:#f0f5e9}.intro-scene-caption>span:last-child{color:#c4d0bf}.intro-scene-caption .live-dot{background:#c4d898;box-shadow:0 0 0 4px #c4d89820}
.reference-gallery{display:flex;flex-direction:column;gap:24px}.reference-gallery figure{margin:0;background:#f3f5f0;border:1px solid #dfe5dc;border-radius:6px;overflow:hidden}.reference-gallery img{display:block;width:100%;height:auto}.reference-gallery figcaption{padding:16px 18px;display:flex;justify-content:space-between;align-items:center;gap:15px}.reference-gallery figcaption b{font-size:13px;font-weight:600}.reference-gallery figcaption p{font-size:11px;margin:5px 0 0;line-height:1.7}.reference-gallery figcaption .small-button{white-space:nowrap}
@media(min-width:1700px){.scene-top{top:24px;left:24px;right:24px}.scene-title b{font-size:15px}.view-switch{top:100px;left:24px}.camera-presets{top:146px;left:24px}.scene-tools{top:100px;right:24px}.camera-presets button{font-size:10px;padding:8px 13px}.scene-tools button{font-size:10px}.scene-status{left:24px}}
@media(max-width:1100px){.scene-badge{display:none}.scene-title b{font-size:11px}.scene-title small{font-size:6px;letter-spacing:.5px}.camera-presets button{padding:6px 8px;font-size:8px}.scene-tools button{font-size:8px;padding:7px 8px;min-width:80px}.scene-top{left:15px;right:15px}.view-switch,.camera-presets{left:15px}.scene-tools{right:15px}.scene-status{left:15px;bottom:148px}.scene-status>small{display:none}}
@media(max-width:900px){.workspace:not(.intro-mode){display:flex;flex-direction:column}.workspace:not(.intro-mode) .step-sidebar{display:none}.workspace:not(.intro-mode) .simulation{height:49%;min-height:260px;flex-shrink:0;width:100%}.workspace:not(.intro-mode) .task-panel{height:51%;width:100%;border-left:0;border-top:1px solid #dce5d8}.step-jump{display:flex!important}.task-tabs{height:42px}.task-content,.guide-content{padding:18px 22px}.task-content h2{font-size:19px}.task-footer{display:flex;flex-wrap:wrap;gap:8px;padding:10px 22px}.task-footer .primary{width:70%;padding:11px}.task-footer .next-button{width:calc(30% - 8px);padding:0}.validation-result{width:100%;max-height:75px}.validation-result:not(:empty){margin-bottom:0;padding:7px 10px}.zone-list{grid-template-columns:repeat(3,1fr)}.objective{margin-bottom:14px}.scene-top{top:12px;left:14px;right:14px}.scene-title{padding:7px 10px}.scene-title small{display:block}.scene-badge{display:none}.view-switch{top:73px;left:14px}.camera-presets{top:112px;left:14px}.scene-tools{top:73px;right:14px}.scene-message{bottom:35px;left:14px;right:120px;padding:8px 12px;max-height:55px}.scene-message b{font-size:10px;margin-bottom:3px}.scene-message span:not(.hint-icon){font-size:8px}.scene-status{bottom:100px;left:14px;font-size:7px}.mini-map{display:none}.scene-footer{bottom:11px}.scene-footer>span:first-child{display:none}.scene-footer{justify-content:flex-end}.zone-label{font-size:8px}.camera-presets button{font-size:8px;padding:6px 9px}}
@media(max-width:560px){.workspace:not(.intro-mode){min-height:560px}.workspace:not(.intro-mode) .simulation{height:43%;min-height:250px}.workspace:not(.intro-mode) .task-panel{height:57%}.view-switch{top:64px;left:10px}.view-switch button{font-size:7px;padding:5px 7px}.camera-presets{top:99px;left:10px}.camera-presets button{font-size:7px;padding:5px 7px}.scene-tools{top:64px;right:10px;gap:5px}.scene-tools button{font-size:7px;min-width:69px;padding:6px}.scene-top{left:10px;right:10px;top:10px}.scene-title{padding:6px 8px}.scene-title b{font-size:10px}.scene-title small{font-size:5px}.scene-btn{width:27px;height:27px}.scene-message{bottom:12px;left:10px;right:105px;padding:7px 8px;max-height:43px}.scene-status{bottom:61px;left:10px;font-size:6px;padding:5px 7px}.scene-footer{bottom:13px;right:10px;font-size:6px}.scene-message .hint-icon{display:none}.scene-message b{font-size:8px}.scene-message span:not(.hint-icon){display:none}.scene-tools svg{width:10px;height:10px}.reference-gallery figcaption{display:block;padding:12px}.reference-gallery figcaption .small-button{margin-top:10px}.zone-label{font-size:7px;padding:4px 5px}.intro-mode .scene-vignette{background:linear-gradient(90deg,#09221ceb,#0c281dbe 65%,#19301d80),linear-gradient(0deg,#0b231fcc,transparent 40%)}}