@charset "UTF-8";
:root{--navy:#122c40;--ink:#203547;--muted:#607486;--line:#dde5ea;--ground:#f2f5f7;--teal:#087f79;--soft:#e4f4ef;--blue:#356bd0;--orange:#dc6f2b;--red:#ba3f42;--white:#fff;font-family:"Noto Sans CJK SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);font-size:14px;font-synthesis:none}
*{box-sizing:border-box}body{margin:0;background:var(--ground)}button,input,select,textarea{font:inherit}button,a,input,select,textarea{ -webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button,input,select,textarea{border:1px solid var(--line);border-radius:7px}button{background:white;color:var(--ink);min-height:35px;padding:7px 12px;display:inline-flex;align-items:center;justify-content:center;gap:7px;font-weight:550;white-space:nowrap;transition:background .16s,border-color .16s,transform .16s}button:hover:not(:disabled){border-color:#9bb7bd;background:#f1f8f6}button:active:not(:disabled){transform:translateY(1px)}a{color:var(--teal);text-underline-offset:3px}input,select,textarea{background:#fff;color:var(--ink);width:100%;min-height:36px;padding:7px 9px}input[type=range]{padding:0;accent-color:var(--teal);min-height:20px;border:0}input[type=checkbox]{accent-color:var(--teal);width:15px;min-height:15px;margin:0;flex:none}textarea{resize:vertical;line-height:1.7}input::placeholder,textarea::placeholder{color:#71818d}:focus-visible{outline:3px solid #208eae;outline-offset:3px}::selection{background:#b6e3da;color:#122c40}input,textarea{caret-color:var(--teal)}h1,h2,h3,p{margin:0}h1{font-size:26px;line-height:1.45;letter-spacing:-.03em;font-weight:740}h2{font-size:16px;font-weight:700}h3{font-size:14px}small,.small{font-size:12px}.muted{color:var(--muted)}.mono,code,pre,.stat strong{font-family:"JetBrains Mono",ui-monospace,SFMono-Regular,Consolas,monospace;font-variant-numeric:tabular-nums}.icon{width:18px;height:18px;stroke:currentColor;stroke-width:1.7;fill:none;stroke-linecap:round;stroke-linejoin:round;flex:none}.skip{position:fixed;top:-50px;left:20px;z-index:100;background:white;padding:12px}.skip:focus{top:10px}.primary{background:var(--teal);border-color:var(--teal);color:white}.primary:hover:not(:disabled){background:#066c67;border-color:#066c67}.secondary{background:var(--soft);color:#066c67;border-color:transparent}.danger{color:var(--red);border-color:#ecc6c6}.danger:hover:not(:disabled){background:#fff1ef;border-color:var(--red)}.plain{border-color:transparent;background:transparent}.compact{min-height:29px;padding:4px 9px;font-size:12px}.wide{width:100%}.row{display:flex;align-items:center;gap:9px}.wrap{flex-wrap:wrap}.between{justify-content:space-between}.gap4{gap:4px}.stack{display:flex;flex-direction:column;gap:10px}.stack16{display:flex;flex-direction:column;gap:16px}.divider{height:1px;background:var(--line);margin:16px 0}.badge{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:650;padding:4px 7px;background:#eef2f6;border-radius:5px;color:#536b7b;white-space:nowrap}.badge.good{background:var(--soft);color:#086c52}.badge.orange{background:#fcf0e4;color:#98531e}.dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#35b98c}.hint{font-size:12px;color:var(--muted);line-height:1.7}.notice{background:#f5f8fb;border-radius:7px;padding:10px 12px;font-size:12px;line-height:1.7;color:#4e6677}.notice.warning{background:#fff5e6;color:#81531b}.field{display:flex;flex-direction:column;gap:6px}.field>label,.field-label{font-size:12px;color:#4d6374;font-weight:600}.field label.row{font-weight:400}.field .unit{font-size:11px;color:var(--muted)}.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}.cols{display:grid;grid-template-columns:1.2fr 1fr;gap:20px}.panel{background:var(--white);border:1px solid var(--line);border-radius:12px;min-width:0;overflow:hidden}.panel-head{display:flex;align-items:center;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--line);min-height:54px;gap:10px}.panel-body{padding:18px}.section-title{display:flex;align-items:center;justify-content:space-between;margin:24px 0 14px;gap:16px}.section-title p{margin-top:5px;color:var(--muted);font-size:13px;line-height:1.7}
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span:last-child{color:var(--teal);font-size:11px}.map-shell .panel-head{padding:13px 16px}.view-tabs{display:flex;gap:20px}.view-tabs button{border:0;background:transparent;border-radius:0;font-size:12px;padding:4px 0;min-height:28px;color:var(--muted)}.view-tabs button.active{color:var(--teal);box-shadow:0 2px 0 var(--teal)}.map-tools{display:flex;padding:10px 13px;gap:10px;flex-wrap:wrap;background:#fafcfc;border-bottom:1px solid var(--line);font-size:11px}.map-tools label{display:flex;align-items:center;gap:5px}.map-tools input{width:12px;min-height:12px}.map-viewport{position:relative;background:#edf3f4;aspect-ratio:32/22;min-height:280px;overflow:hidden}.map-viewport canvas{width:100%;height:100%;display:block;touch-action:none;cursor:crosshair}.map-tag{position:absolute;left:13px;top:12px;background:#fffffff0;border:1px solid #e0e8eb;padding:5px 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summary{display:flex;align-items:center;gap:10px;cursor:pointer;padding:14px 0;font-size:12px;font-weight:550;list-style:none;line-height:1.7}.lesson summary::-webkit-details-marker{display:none}.lesson summary .icon{margin-left:auto;color:#8a9ca6;width:15px}.step-no{font-size:10px;width:22px;height:22px;background:#eef3f5;color:#5b7484;border-radius:5px;display:grid;place-items:center;flex:none}.lesson[open] summary .icon{transform:rotate(180deg)}.lesson-content{padding:0 0 16px 32px;color:#5f7484;font-size:12px;line-height:1.9}.lesson-content p+p{margin-top:7px}.lesson-content strong{color:#365362}.lesson-check{display:flex;align-items:center;gap:7px;font-size:11px;margin-top:11px;color:var(--teal)}.algorithm-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0}.algorithm{padding:20px;border-right:1px solid var(--line)}.algorithm:last-child{border:0}.algorithm h3{font-size:15px;margin-bottom:9px}.algorithm 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h3{color:var(--ink);margin-bottom:9px}.article p{margin-bottom:10px;max-width:90ch}.article ol{padding-left:20px;margin:10px 0}.article li+li{margin-top:8px}.timeline{display:grid;grid-template-columns:repeat(6,1fr);padding:16px 20px;gap:6px;border-bottom:1px solid var(--line)}.timeline button{border:0;display:flex;flex-direction:column;align-items:flex-start;gap:7px;white-space:normal;font-size:11px;padding:8px;background:#f5f8fa;line-height:1.5}.timeline button b{font-size:10px;color:#6f8795}.timeline button.current{background:#e1f3ec;color:#076f5b}.timeline button.done{background:#eef7f3}.storyboard-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding:20px}.story-card{min-width:0}.story-card button{padding:0;border:0;display:block;width:100%;border-radius:8px;overflow:hidden}.story-card h3{font-size:12px;margin:10px 0 5px}.story-card p{font-size:11px;color:var(--muted);line-height:1.8}.story-card.current .scene-picture{box-shadow:inset 0 0 0 3px #178a70}.compare{display:grid;grid-template-columns:1fr 1fr;gap:16px}.compare figure{margin:0;min-width:0}.compare figcaption{font-size:12px;font-weight:600;padding:10px 0 7px;display:flex;align-items:center;gap:8px}.compare p{font-size:11px;color:var(--muted);line-height:1.8}.compare .scene-picture{border-radius:8px}.state-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1px solid var(--line)}.state-grid div{padding:15px 18px;border-right:1px solid var(--line);font-size:11px;color:var(--muted)}.state-grid div:last-child{border:0}.state-grid strong{display:block;color:var(--ink);font-size:13px;margin-top:6px}.chart{display:block;width:100%;height:85px}.chart-labels{display:flex;justify-content:space-between;font-size:10px;color:var(--muted);margin-top:4px}.empty{padding:30px 18px;text-align:center;color:var(--muted);font-size:12px;line-height:1.9}.footer{display:flex;justify-content:space-between;gap:15px;border-top:1px solid var(--line);padding-top:20px;margin-top:28px;color:#728694;font-size:11px;line-height:1.8}.footer button{font-size:11px;min-height:28px}.toast{position:fixed;left:calc(50% + 80px);bottom:28px;transform:translateX(-50%);background:#173d42;color:#fff;padding:13px 20px;border-radius:8px;z-index:70;box-shadow:0 8px 25px #15252d28;font-size:13px;max-width:80vw;line-height:1.7;animation:toast-in .18s ease-out}.toast.error{background:#8f3437}@keyframes toast-in{from{transform:translate(-50%,6px);opacity:.6}to{transform:translate(-50%,0);opacity:1}}
.pet-button{position:fixed;right:26px;bottom:24px;border:0;background:transparent;min-height:70px;min-width:92px;padding:0;z-index:50;display:flex;flex-direction:column;gap:7px}.pet-button:hover:not(:disabled){background:transparent;border:0}.parcel{width:51px;height:47px;background:#d69e60;border:2px solid #ad743d;border-radius:6px;position:relative;box-shadow:5px 4px 0 #e6b982;transform:rotate(-5deg)}.parcel:before{content:'';position:absolute;width:12px;height:20px;left:18px;top:-2px;background:#f5d9ac;border:1px solid #d3ad7c}.parcel .eyes{position:absolute;left:9px;top:27px;display:flex;gap:17px}.parcel .eyes i{width:5px;height:6px;background:#3d4c4c;border-radius:3px;animation:blink 6s infinite}.parcel:after{content:'';position:absolute;left:20px;bottom:4px;width:8px;height:4px;border:solid #795333;border-width:0 0 1.5px;border-radius:50%}.pet-label{font-size:11px;background:white;border:1px solid var(--line);padding:3px 8px;border-radius:5px;box-shadow:0 3px 12px #20354712}.pet-dot{position:absolute;right:14px;top:1px;background:#30a788;border:2px solid white;width:10px;height:10px;border-radius:50%}@keyframes blink{0%,45%,49%,100%{transform:scaleY(1)}47%{transform:scaleY(.12)}}.assistant{position:fixed;right:27px;bottom:123px;width:390px;height:min(570px,75vh);z-index:49;background:white;border:1px solid #cededc;border-radius:13px;box-shadow:0 14px 48px #15252d30;display:flex;flex-direction:column;overflow:hidden}.assistant-header{display:flex;align-items:center;justify-content:space-between;background:#f0f8f4;padding:13px 16px;border-bottom:1px solid #dceae5}.assistant-header strong{font-size:13px}.assistant-header small{display:block;font-size:10px;color:#648278;margin-top:3px}.assistant-messages{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:13px}.message{font-size:12px;line-height:1.9;white-space:pre-wrap;padding:11px 13px;border-radius:8px;background:#f2f6f7;color:#355462;max-width:94%;align-self:flex-start;overflow-wrap:anywhere}.message.user{background:#e3f3ec;color:#235945;align-self:flex-end}.message code{background:#e6eef0}.assistant-prompts{padding:0 13px 9px;display:flex;gap:5px;flex-wrap:wrap}.assistant-prompts button{font-size:10px;min-height:27px;padding:4px 7px;color:#4c7266;background:#f5faf7}.assistant-form{padding:12px;border-top:1px solid var(--line);display:flex;gap:8px;align-items:end}.assistant-form textarea{font-size:12px;min-height:39px;height:58px}.assistant-form button{height:39px;min-width:41px}.assistant-config{padding:14px 16px;border-top:1px solid var(--line);background:#fafcfb;max-height:360px;overflow:auto;display:grid;gap:10px}.assistant-config label{font-size:11px;color:var(--muted)}.assistant-config input{font-size:11px;margin-top:4px}.assistant-config p{font-size:10px;line-height:1.7;color:#6b817a}.assistant-config .two{gap:6px}dialog{max-width:min(960px,92vw);width:820px;border:0;border-radius:13px;padding:0;box-shadow:0 20px 80px #0d29314d;color:var(--ink)}dialog::backdrop{background:#142d4066}dialog .dialog-head{display:flex;justify-content:space-between;padding:17px 22px;border-bottom:1px solid var(--line);align-items:center}dialog .dialog-body{padding:22px;max-height:75vh;overflow:auto}dialog .scene-picture{width:100%;aspect-ratio:1.5}.check-row{display:flex;align-items:center;gap:7px;font-size:12px;line-height:1.7}.inline-link{font-size:11px}.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
@media(min-width:1700px){.workspace{grid-template-columns:255px minmax(420px,1fr) 285px}.map-viewport{min-height:430px}.right-rail .scene-picture{aspect-ratio:1.5}}
@media(max-width:1350px){.sidebar{width:192px;padding:25px 12px}.app-main{margin-left:192px}.content{padding:22px}.topbar{padding:0 22px}.workspace{grid-template-columns:216px minmax(300px,1fr) 228px;gap:12px}.controls .panel-body{padding:14px}.page-heading p{font-size:12px}.page-heading .actions{max-width:330px;justify-content:flex-end}.stat strong{font-size:20px}.panel-head{padding:14px}.brand-name{font-size:15px}.brand{gap:8px}.map-tools{gap:8px}.map-caption{padding:10px;font-size:9px}}
@media(max-width:1150px){.workspace{grid-template-columns:220px minmax(300px,1fr)}.right-rail{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:15px}.right-rail .scene-picture{max-height:200px;background-size:204% 312%;aspect-ratio:1.5}.right-rail .metrics{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.stat:nth-last-child(2){border:0}.cols{grid-template-columns:1fr}.page-heading{align-items:flex-start}.scene-preview{display:grid;grid-template-columns:1fr 1fr}.scene-preview .panel-head{grid-column:1/-1}.scene-preview .image-note{align-self:center;font-size:11px;padding:15px}.storyboard-grid{gap:14px;padding:16px}.algorithm{padding:16px}}
@media(max-width:850px){.sidebar{position:relative;width:100%;height:auto;padding:14px 18px 0;display:block}.brand{padding:0 0 13px}.brand small{display:none}.brand-mark{width:26px;height:28px}.brand-name{font-size:15px}.course-label,.sidebar-info,.sidebar-bottom{display:none}.sidebar nav{display:flex;gap:8px}.nav-link{flex:1;justify-content:center;border-radius:6px 6px 0 0;margin:0;padding:12px 5px;font-size:12px;gap:6px}.nav-link small{display:none}.nav-link .icon{width:16px}.app-main{margin:0}.topbar{height:49px;padding:0 18px}.topbar .crumb{font-size:10px;gap:5px}.topbar .top-actions{gap:7px}.topbar .avatar{display:none}.topbar .badge{font-size:9px}.content{padding:22px 18px 32px}.page-heading{gap:13px}.page-heading h1{font-size:23px}.page-heading .actions{max-width:270px}.page-heading p{max-width:45ch}.workspace{grid-template-columns:210px minmax(280px,1fr)}.map-viewport{min-height:270px}.storyboard-grid{grid-template-columns:repeat(2,1fr)}.timeline{padding:12px;gap:4px}.timeline button{font-size:10px;padding:6px}.toast{left:50%}.footer{padding-bottom:60px}.algorithm p{font-size:11px}}
@media(max-width:620px){.topbar .crumb>span:first-child,.topbar .crumb .divider-char{display:none}.topbar .top-actions .badge{display:none}.topbar .top-actions button{font-size:10px;min-height:28px}.page-heading{display:block;margin-bottom:16px}.page-heading h1{font-size:24px}.page-heading p{max-width:none;line-height:1.8}.page-heading .actions{max-width:none;margin-top:15px;justify-content:flex-start}.page-heading .actions button{font-size:12px}.stage-pills{font-size:10px;gap:5px}.workspace{display:flex;flex-direction:column;gap:14px}.workspace>*{width:100%}.controls .panel-body{display:grid;grid-template-columns:1fr 1fr;gap:15px;padding:16px}.controls .panel-body>.span-all,.controls .control-section{grid-column:1/-1}.control-section .stack{display:grid;grid-template-columns:1fr 1fr}.controls .panel-body>.notice{grid-column:1/-1}.controls .panel-head{padding:13px 16px}.map-viewport{min-height:260px}.map-tools{font-size:10px;gap:8px}.map-tools input{width:11px;min-height:11px}.right-rail{display:grid;grid-template-columns:1fr;gap:14px}.right-rail .metrics{gap:0 18px}.scene-preview .scene-picture{min-height:140px;aspect-ratio:1.5}.scene-preview .image-note{padding:12px;font-size:10px}.section-title{margin-top:22px;gap:10px;align-items:flex-start}.section-title h2{font-size:15px}.section-title p{font-size:12px}.section-title button{font-size:11px}.two{gap:10px}.cols{gap:15px}.zone-row{gap:6px;padding:14px}.zone-chip{flex:1 0 40%;padding:7px;font-size:10px}.editor-row{grid-template-columns:65px 1fr;gap:8px;padding:0 14px 14px}.editor-row>button{grid-column:1/-1}.table-toolbar{padding:13px 14px;align-items:flex-start}.table-toolbar .row{gap:6px}.data-table td,.data-table th{padding:11px}.algorithm-grid{grid-template-columns:1fr}.algorithm{border-right:0;border-bottom:1px solid var(--line);padding:18px}.algorithm p{font-size:12px}.algo-bottom{justify-content:flex-start;gap:15px}.timeline{grid-template-columns:repeat(3,1fr);gap:6px}.timeline button{padding:9px;font-size:11px}.storyboard-grid{padding:14px;gap:16px 12px}.story-card h3{font-size:11px}.story-card p{font-size:10px}.compare{gap:10px}.compare figcaption{font-size:11px;flex-wrap:wrap}.compare p{font-size:10px}.panel-body{padding:15px}.state-grid{grid-template-columns:1fr 1fr}.state-grid div:nth-child(2){border:0}.state-grid div{padding:12px 15px;border-bottom:1px solid var(--line)}.assistant{right:12px;bottom:112px;width:calc(100vw - 24px);height:min(570px,72vh)}.pet-button{right:12px;bottom:17px;min-width:70px}.pet-label{font-size:10px}.parcel{width:43px;height:41px}.parcel:before{left:14px}.parcel .eyes{left:7px;top:23px;gap:14px}.parcel:after{left:16px}.footer{flex-direction:column;font-size:10px;padding-right:70px}.content{padding:20px 14px 26px}.log-line{grid-template-columns:53px 38px 1fr;font-size:10px}.lesson-content{padding-left:0}.code-editor{font-size:10px}.article{padding:16px}.panel-head{padding:14px}.map-tag{top:9px;font-size:9px}.robot-bar{font-size:10px}.scene-title{font-size:9px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.sidebar,.topbar,.pet-button,.assistant,.page-heading .actions,.controls,.footer button,.map-tools,button{display:none!important}.app-main{margin:0}.content{padding:0}.workspace{display:block}.workspace>*{margin-bottom:16px}.map-viewport{max-height:520px}.right-rail{display:grid;grid-template-columns:1fr 1fr}.panel{break-inside:avoid}.lesson-content{display:block}.toast{display:none}}

.sample-tag{display:inline-block;font-size:10px;line-height:1.5;padding:1px 4px;border:1px solid #d8e5e9;border-radius:3px;color:#607486;background:#f4f8fa;vertical-align:baseline}.data-table .sample-tag{margin-left:5px}
@media(max-width:620px){.topbar .top-actions{gap:5px}.topbar .top-actions button{padding:5px 7px}.topbar .top-actions button .icon{width:13px;height:13px}}

/* Course hours and the W01 map-corresponding warehouse scene. */
.lesson-hours{font-size:10px;color:var(--teal);font-weight:500;white-space:nowrap;margin-left:auto;padding-left:8px}.lesson summary>.icon{flex-shrink:0}.sidebar-info .between{font-size:10px;gap:8px}.sidebar-info #learning-hours{white-space:nowrap;color:#d5eee5}.warehouse-button{position:relative;overflow:hidden}.warehouse-image{display:block;width:100%;height:auto;aspect-ratio:1.6;object-fit:cover}.warehouse-zoom{position:absolute;right:8px;bottom:8px;display:flex;align-items:center;gap:4px;background:#123044e6;color:white;padding:4px 6px;border-radius:4px;font-size:10px}.warehouse-zoom .icon{width:12px;height:12px}.warehouse-detail-image{display:block;width:100%;height:auto;border-radius:6px}.course-label{white-space:nowrap}
@media(max-width:850px){.sidebar-info{display:block;border-top:1px solid #294354;margin:0;padding:10px 0 12px}.sidebar-info .row{font-size:11px}.sidebar-info p{display:none}.sidebar-progress{margin-top:8px;height:3px}.stage-pills{flex-wrap:wrap}}
@media(max-width:600px){.lesson-hours{font-size:9px}}

.map-tools[hidden]{display:none}.warehouse-map-view{height:100%;background:#edf3f4}.warehouse-map-view .warehouse-image{width:100%;height:100%;aspect-ratio:auto;object-fit:contain}.warehouse-map-view .warehouse-zoom{right:12px;bottom:12px;padding:6px 9px;font-size:11px}