/* Shared semantic content, separate mobile presentation. Desktop baseline: 1440px. */
.intro-mobile-cover,.mobile-nav-toggle{display:none}
.mobile-level-navigation,.mobile-nav-backdrop{display:none}
@media(min-width:981px){
 .section-shell{width:86.111111%}
 .curriculum-intro.section-shell{width:100%;height:34.722222vw;min-height:0;padding:9.722222vw 3.888889vw 5vw}
 .curriculum-intro h1{max-width:69.444444vw;font-size:4.1vw;margin-top:1.388889vw}
 .curriculum-intro>p:not(.eyebrow){font-size:max(14px,1.041667vw);max-width:52.777778vw;margin-top:1.388889vw}
 .curriculum-intro>.eyebrow{font-size:max(11px,.833333vw)}
 .intro-media-tools{right:2.222222vw;bottom:1.527778vw;font-size:max(11px,.763889vw)}
 .level-banner{height:var(--photo-height);--photo-height:16.666667vw;grid-template-columns:4.444444vw minmax(0,1fr);gap:1.666667vw;padding-inline:6.944444vw}
 .level-card[open]>.level-banner,.level-banner:focus-visible{--photo-height:25vw}
 .level-banner-copy{padding-block:1.666667vw;max-width:45.138889vw}
 .level-banner h2{font-size:max(20px,2.013889vw);margin-top:.625vw}
 .level-meta{font-size:max(12px,.833333vw)}
 .level-teaser{font-size:max(12px,.972222vw);margin-top:.625vw;max-width:39.583333vw}
 .level-highlights{font-size:max(11px,.833333vw);gap:1.25vw;margin-top:1.25vw}
 .level-highlights>span+span{padding-left:1.25vw}
 .level-index strong{font-size:3.333333vw}
 .level-index small{font-size:max(10px,.694444vw)}
 .level-detail .hero{padding:4.722222vw 2.222222vw 5.416667vw}
 .hero-title{font-size:max(30px,4.027778vw)}
 .section-heading h2,.space-content h2,.outcomes h2{font-size:max(34px,4.166667vw)}
 .classroom-section h2{font-size:max(30px,3.75vw)}
 .display-heading{font-size:max(42px,5.416667vw)}
 .hero-description,.section-description{font-size:max(14px,1.111111vw)}
 .classroom-section{padding-block:5.902778vw 7.638889vw}
}
@media(min-width:981px) and (hover:hover) and (pointer:fine){.level-banner:hover{--photo-height:25vw}}
@media(max-width:980px){
 :root{--header:64px;--mobile-gutter:22px;--mobile-surface:#101827;--mobile-copy:#d1dbea}
 html{scroll-padding-top:calc(var(--header) + 12px)}
 .site-header{height:var(--header);padding:0 18px;gap:12px;background:#070c15f5;z-index:30}
 .site-header nav,.header-tools #motionToggle,.preview-mark{display:none!important}
 .brand{font-size:16px;gap:10px}.brand img{width:38px;height:38px;border-radius:11px}.brand-caption{font-size:10px;margin-top:2px}
 .header-tools{gap:7px}
 .header-tools button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;font-size:12px;padding:0 12px;border-radius:14px;gap:8px}
 .header-tools #collapseLevel{font-size:0;width:44px;padding:0}
 #collapseLevel::after{content:'收起';font-size:12px}
 .mobile-nav-toggle{display:inline-flex}
 .mobile-nav-backdrop:not([hidden]){display:block;position:fixed;inset:var(--header) 0 0;background:#02050bb3;border:0;z-index:22;backdrop-filter:blur(4px)}
 .mobile-level-navigation:not([hidden]){display:flex;flex-direction:column;position:fixed;top:calc(var(--header) + 10px);left:16px;right:16px;max-width:540px;margin-left:auto;background:#101827;border:1px solid #2c405a;border-radius:18px;padding:8px;z-index:25;box-shadow:0 18px 70px #0009;max-height:calc(100dvh - var(--header) - 32px);overflow:auto}
 .mobile-level-navigation a{display:flex;align-items:center;gap:14px;min-height:52px;padding:12px 14px;font-size:14px;line-height:1.6;border-radius:11px}
 .mobile-level-navigation a>span{color:#85d7ff;font:12px ui-monospace,Consolas,monospace}
 .mobile-level-navigation a:first-child{color:#b4c9e2;border-bottom:1px solid #29364d;border-radius:0;margin-bottom:4px;justify-content:space-between}
 .mobile-level-navigation a:hover,.mobile-level-navigation a:focus-visible{background:#1b3049}
 .intro-video{display:none!important}
 .intro-mobile-cover{display:block;position:relative;z-index:1;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover;flex:none}
 .curriculum-intro.section-shell{min-height:0;height:auto;width:100%;display:flex;align-items:stretch;text-align:left;padding:var(--header) 0 30px;--scene-image:none;background:#080e18}
 .curriculum-intro::before,.curriculum-intro::after{display:none}
 .curriculum-intro>.eyebrow,.curriculum-intro>h1,.curriculum-intro>p:not(.eyebrow){position:relative;z-index:2;padding-inline:var(--mobile-gutter);max-width:100%}
 .curriculum-intro>.eyebrow{font-size:11px;margin-top:24px;justify-content:flex-start}
 .curriculum-intro h1{font-size:clamp(30px,7.6vw,42px);line-height:1.3;letter-spacing:-.035em;margin-top:12px}
 .curriculum-intro>p:not(.eyebrow){font-size:14px;line-height:1.85;margin-top:16px;color:var(--mobile-copy)}
 .intro-media-tools{top:calc(var(--header) + 12px);right:12px;bottom:auto;z-index:3;font-size:10px;background:#08101edb;padding:5px 10px;border-radius:12px}
 #introVideoToggle{display:none!important}
 .level-list{padding:16px 16px 24px}
 .level-card{border-radius:18px;overflow:hidden;margin-bottom:16px;background:var(--mobile-surface)}
 .level-card[open]{margin-inline:-16px;border-radius:0;background:var(--bg)}
 .level-banner{display:flex;flex-direction:column;align-items:stretch;position:relative;height:auto;min-height:0;padding:0;gap:0;background:var(--mobile-surface);transition:none;--photo-height:auto}
 .level-banner::after{display:none}
 .level-banner-photo{order:0;position:relative;inset:auto;width:100%;height:auto;aspect-ratio:3/1;z-index:0;flex:none}
 .level-banner-photo img{object-fit:cover;object-position:center!important;width:100%;height:100%}
 .level-banner-copy{order:1;padding:20px;max-width:none;position:relative;z-index:1}
 .level-index{display:flex;flex-direction:row;align-items:center;gap:6px;position:absolute;top:10px;left:12px;z-index:2;padding:4px 9px;background:#081225df;border-radius:10px}
 .level-index small{font-size:9px}.level-index strong{font-size:20px;letter-spacing:0;line-height:1.4}
 .level-meta{font-size:12px;color:#91d6ff;line-height:1.7}
 .level-banner h2{font-size:clamp(22px,4vw,28px);line-height:1.4;margin-top:6px;color:#f3f6fc}
 .level-teaser{font-size:14px;line-height:1.8;max-width:none;margin-top:8px;color:var(--mobile-copy)}
 .level-highlights{display:none}
 .level-detail{animation:none}
 .level-detail .hero{padding:34px var(--mobile-gutter) 44px;text-align:left;align-items:stretch;gap:0}
 .hero-copy{width:100%}.hero-title{font-size:clamp(28px,7.7vw,42px);line-height:1.35;letter-spacing:-.04em}
 .project-name{font-size:14px;margin-block:18px 10px}
 .hero-description{font-size:14px;line-height:1.9;margin-top:18px}
 .level-detail .hero-copy>.eyebrow,.level-detail .hero-actions{justify-content:flex-start}
 .hero-actions{display:flex;flex-direction:column;align-items:stretch;gap:14px!important;margin-top:24px}
 .hero-actions .button{width:100%;min-height:48px;font-size:14px;justify-content:space-between;padding-inline:18px;border-radius:12px}
 .hero-actions .quiet-link{font-size:13px!important;min-height:44px;justify-content:space-between}
 .level-detail .hero-facts{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px!important;margin-top:24px;justify-content:stretch}
 .hero-facts>div{min-width:0;padding:13px 10px;border-radius:12px;background:#0c1624e8;border:1px solid #2b4058}
 .hero-facts strong,#level04 .embodied-fact,#level05 .professional-fact{font-size:20px;line-height:1.6}
 .hero-facts .hardware-cad-name,#level03 .creation-cad-name{font-size:12px;line-height:2.65}
 .hero-facts strong span{font-size:11px}.hero-facts small{font-size:11px;line-height:1.7}
 .scroll-cue{display:none}
 .section-shell{width:100%;padding-inline:var(--mobile-gutter)}
 .level-detail .section-scenery::before,.level-detail .section-scenery::after{left:0;width:100%;transform:none}
 .level-detail .section-scenery::after{opacity:.8}
 .level-detail .section-scenery::before{background-size:cover;mask-image:linear-gradient(transparent,#000 15%,#000 85%,transparent)}
 .level-detail .statement,.level-detail .ai-section,.hardware-comparison,.hardware-projects,.creation-comparison,.creation-projects,.creation-launch,.professional-platforms,.classroom-section,.outcomes{padding-block:44px}
 .section-heading h2,.journey-copy h2,.space-content h2,.outcomes h2,.classroom-section h2,.display-heading{font-size:clamp(25px,6.9vw,34px);line-height:1.4;letter-spacing:-.03em;margin-top:12px;overflow-wrap:anywhere}
 .section-description{font-size:14px!important;line-height:1.9;margin-top:16px}
 .section-description br,.hero-description br{display:none}
 .eyebrow{font-size:11px;letter-spacing:.09em;line-height:1.7;flex-wrap:wrap}
 .micro-note{font-size:12px;line-height:1.9}
 .js-enhanced .reveal{opacity:1!important;transform:none!important;transition:none!important;animation:none!important}
 .scroll-scene{height:auto!important}.scene-sticky,.compare-sticky,.reduce-motion .scene-sticky,.reduce-motion .compare-sticky{position:relative;top:0;height:auto;min-height:0;padding-block:44px;display:flex;flex-direction:column;align-items:stretch;gap:24px}
 .journey-steps{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:10px;margin:24px 0 14px;padding:0 0 8px;scrollbar-width:thin;scrollbar-color:#3b6089 transparent}
 .journey-steps li,.journey-steps li:last-child{flex:0 0 156px;margin:0;padding:0;border:1px solid #2c405c;border-radius:12px;background:#0c1727;scroll-snap-align:start;grid-column:auto}
 .journey-steps li::before{display:none}.journey-steps button{display:block;width:100%;height:100%;min-height:86px;padding:14px;text-align:left;line-height:1.6}
 .journey-steps .step-number{display:block;font-size:11px;margin-bottom:6px}.journey-steps strong{font-size:13px}.journey-steps small{display:none}
 .journey-steps li.is-active{background:#162e48;border-color:#75caff}
 .level-detail .project-stage,#level02 .hardware-stage,#level03 .creation-stage,#level04 .embodied-stage,#level05 .professional-stage{height:auto;min-height:0;width:100%;max-width:none;overflow:hidden;border-radius:16px;margin:0;box-shadow:none}
 .stage-header{position:relative;padding:15px 18px;font-size:12px}.stage-grid{display:none}
 .stage-plan,.stage-code,.stage-assets,.stage-debug,.hardware-stage-panel,.creation-stage-panel,.embodied-stage-panel,.professional-stage-panel{position:relative;inset:auto!important;display:none;opacity:1;visibility:visible;transform:none!important;transition:none!important;pointer-events:auto;padding:24px 20px;min-height:270px}
 :is(.stage-plan,.stage-code,.stage-assets,.stage-debug,.hardware-stage-panel,.creation-stage-panel,.embodied-stage-panel,.professional-stage-panel)[aria-hidden="false"]{display:block}
 .stage-tag{font-size:12px;line-height:1.8}.stage-plan h3,.hardware-stage-panel h3,.creation-stage-panel h3,.embodied-stage-panel h3,.professional-stage-panel h3{font-size:25px;line-height:1.4;margin-top:15px}
 .stage-plan .plan-orbit{display:none}.plan-nodes{flex-wrap:wrap;gap:8px;margin-top:24px}.plan-nodes span{font-size:13px;padding:8px 12px}.plan-nodes i{width:10px}
 .code-result{position:static;width:auto;opacity:1;margin-top:20px;text-align:left}.code-result>span{font-size:32px;line-height:1.4}.code-result>div{font-size:12px}
 .stage-blocks .block{font-size:12px;padding:9px 12px}.stage-blocks{margin-top:12px}
 .stage-assets[aria-hidden="false"]{display:grid;grid-template-columns:1fr 1fr;gap:14px}
 .stage-assets .stage-tag,.asset-prompt{grid-column:1 / -1}.asset-preview{position:relative;inset:auto!important;width:100%;height:150px;transform:none!important}.asset-prompt{position:static;font-size:12px;margin-top:8px}
 .stage-footer{position:relative;inset:auto;padding:15px 18px;font-size:12px;line-height:1.8;display:flex;flex-direction:column;align-items:stretch;gap:12px}
 .stage-progress,.professional-stage .stage-progress,.creation-stage .stage-progress,.embodied-stage .stage-progress{width:100%;height:3px}
 .hardware-stage-panel p,.creation-stage-panel p,.embodied-stage-panel p,.professional-stage-panel p{font-size:13px;line-height:1.9}
 .hardware-shell{margin-top:20px}.creation-code{overflow-wrap:anywhere}.creation-code li{font-size:12px;line-height:2}
 .embodied-method-pair{grid-template-columns:1fr 1fr}.embodied-method-pair>span{font-size:12px}
 .comparison{display:flex;flex-direction:column;border-radius:16px;margin-top:24px}.lesson-model{border-right:0;border-bottom:1px solid var(--line)}.lesson-model,.project-model{padding:22px 18px}
 .lesson-track{flex-direction:column;gap:16px}.lesson-track>div{flex-direction:row;align-items:center;padding:12px;gap:10px}.lesson-track i{display:none}.lesson-track strong{font-size:14px}.lesson-track span{font-size:13px}
 .project-network{height:auto;display:flex;flex-direction:column;gap:12px;margin:20px 0}
 .network-lines{display:none}.network-center,.network-node{position:static;transform:none;width:auto;height:auto;min-height:48px;padding:12px 14px;border-radius:10px;flex:none;display:flex;align-items:center;font-size:13px}
 .network-center{display:block;text-align:left}.network-center strong{font-size:16px}.network-center small{font-size:12px;margin-top:5px}.network-node>i{display:inline}.mentor-bar{flex-wrap:wrap;line-height:1.9}.model-heading small{font-size:12px}
 .compare-bottom{flex-direction:column;align-items:stretch}.compare-bottom .micro-note{max-width:100%}
 .hardware-compare-grid,.creation-compare-grid{grid-template-columns:1fr;gap:16px;margin-top:24px}
 .creation-mainline-grid,.outcome-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px 16px;margin-top:28px}
 .creation-mainline-grid article,.outcome-grid article,.outcome-grid article:first-child,.outcome-grid article:nth-child(3){border:0;border-top:1px solid #385570;padding:18px 0 0}
 .creation-mainline-mark{font-size:32px}.creation-mainline-grid h3,.outcome-grid h3{font-size:17px;margin-top:10px;line-height:1.5}.creation-mainline-grid p,.outcome-grid p{font-size:13px;line-height:1.9;margin-top:10px}
 .hardware-project-grid,.creation-project-grid,.creation-presentation-points,.professional-platform-grid{grid-template-columns:1fr;gap:24px;margin-top:26px}
 .hardware-project-grid h3,.creation-project-grid h3,.creation-presentation-points h3,.professional-platform-grid h3{font-size:21px}.hardware-project-grid p,.creation-project-grid p,.creation-presentation-points p,.professional-platform-grid p{font-size:14px;line-height:1.9}
 .ai-console{margin-top:24px;border-radius:16px}.ai-tabs{overflow-x:auto;display:flex}.ai-tabs button{flex:1 0 100px;min-height:52px;padding:12px 8px;font-size:13px}
 .ai-panel{display:flex;flex-direction:column;align-items:stretch;padding:24px 20px;gap:24px;min-height:0}.ai-panel-copy h3{font-size:25px}.ai-panel-copy>p{font-size:14px;line-height:1.9}.ai-diagram{min-height:240px}.prompt-example p{font-size:13px;line-height:1.9}.console-note{font-size:12px;line-height:1.9;padding:14px 18px}
 .classroom-section .section-heading{position:relative;z-index:2;opacity:1!important;transform:none!important;margin-bottom:20px}
 .classroom-film{position:relative;z-index:1;opacity:1!important;transform:none!important}.classroom-player{border-radius:12px;aspect-ratio:16/9}.classroom-player video{object-fit:contain}
 .classroom-play{inset:0 0 40px;gap:10px;font-size:12px}.classroom-play>span:first-child{width:44px;height:44px;font-size:16px}.classroom-play>span:last-child{padding:6px 9px}
 .classroom-film figcaption{font-size:12px;line-height:1.8;gap:8px;align-items:flex-start;flex-direction:column;margin-top:14px}
 .closing{padding-block:44px 20px;text-align:left}.closing h3{font-size:28px;line-height:1.4}.closing .creation-mentor-note,.closing .hardware-mentor-note{font-size:14px}.closing .button{min-height:48px;font-size:14px;border-radius:12px}.back-top{font-size:13px;min-height:44px}
 .level-detail-end{padding:10px 22px 32px}.level-detail-end button{width:100%;min-height:48px;font-size:14px;border-radius:12px}
 .site-footer{padding:28px 22px;gap:22px}.site-footer>div:first-child>span{font-size:12px;line-height:1.9}.footer-links{font-size:12px;gap:16px;max-width:100%}
}
@media(max-width:359px){:root{--mobile-gutter:18px}.site-header{padding-inline:12px}.brand{font-size:14px;gap:8px}.brand img{width:34px;height:34px}.header-tools button{padding-inline:10px}.hero-facts>div{padding-inline:8px}.hero-facts strong,#level04 .embodied-fact,#level05 .professional-fact{font-size:17px}.hero-facts .hardware-cad-name,#level03 .creation-cad-name{font-size:11px}.creation-mainline-grid,.outcome-grid{grid-template-columns:1fr}.stage-assets[aria-hidden="false"]{gap:10px}.stage-blocks .block{font-size:11px}}