:root{--ink:#172139;--blue:#2538a8;--yellow:#ffda65;--muted:#526078;--line:#dbe1ec;--soft:#f2f5fa;--green:#13684d;--red:#a13238;--paper:#fff;--r:18px}
*{box-sizing:border-box}html,body{margin:0;background:#e9edf3;color:var(--ink);font-family:'Microsoft YaHei','PingFang SC',system-ui,sans-serif}button,input,select{font:inherit}button{cursor:pointer}button:disabled{cursor:default;opacity:.55}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:4px solid #cf7100;outline-offset:4px}a{color:var(--blue)}[hidden]{display:none!important}
.reveal{height:calc(100% - 64px);font-size:24px;line-height:1.5}.reveal .slides{text-align:left}.reveal .slides>section{height:720px;padding:32px 52px 36px;overflow:hidden;background:var(--paper)}.reveal h1,.reveal h2,.reveal h3{font-family:inherit;text-transform:none;font-weight:800;color:var(--ink);margin:0;letter-spacing:-.035em}.reveal h1{font-size:64px;line-height:1.2}.reveal h2{font-size:40px;line-height:1.25;margin:12px 0 24px}.reveal h3{font-size:27px;line-height:1.3;margin:8px 0 12px}.reveal p{margin:8px 0}.reveal ul,.reveal ol{margin:8px 0 8px 24px}.reveal li{margin:8px 0}.reveal button,.reveal input{font:inherit}.reveal img{margin:0;max-width:100%;max-height:none}.reveal .progress{height:4px;color:var(--blue)}
.topline{display:flex;justify-content:space-between;align-items:center;font-size:16px;font-weight:700;color:var(--muted);letter-spacing:.05em;padding-bottom:12px;border-bottom:1px solid var(--line)}.topline strong{color:var(--blue)}.phase{font-size:15px;letter-spacing:.12em;text-transform:uppercase;color:var(--blue);font-weight:800}.muted{color:var(--muted)}.small{font-size:19px;line-height:1.5}.big{font-size:30px;line-height:1.5}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:28px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.center{align-items:center}.card{padding:24px;border:1px solid var(--line);border-radius:var(--r);background:#fff}.soft{background:var(--soft);border-color:var(--soft)}.blue-card{background:var(--blue);color:#fff;border-color:var(--blue)}.blue-card h3,.blue-card h2,.blue-card .muted{color:#fff}.yellow-card{background:#fff4cb;border-color:#eddca4}.pill,.tag{display:inline-block;font-size:17px;font-weight:700;padding:5px 12px;border-radius:8px;background:#edf0ff;color:var(--blue)}.tag{background:var(--soft);color:var(--ink)}.number{display:inline-grid;place-items:center;width:40px;height:40px;background:var(--blue);border-radius:50%;color:#fff;font-size:22px;font-weight:800}.rule{height:1px;background:var(--line);margin:18px 0}.flow{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.btn{border:1px solid transparent;border-radius:10px;background:var(--blue);color:#fff;padding:11px 16px;font-size:20px!important;font-weight:700!important;min-height:46px}.btn.secondary{background:#fff;border-color:#aeb8cf;color:var(--blue)}.btn.yellow-btn{background:var(--yellow);color:var(--ink)}.btn[aria-pressed=true]{background:var(--green);color:#fff}.btn:hover:not(:disabled){filter:brightness(.94)}.footer-note{position:absolute;bottom:30px;left:52px;right:52px;font-size:18px;color:var(--muted);border-top:1px solid var(--line);padding-top:12px}.status{font-size:20px;min-height:60px;margin-top:14px!important}.success{color:var(--green)}.hero{height:530px;display:grid;grid-template-columns:1.15fr .85fr;align-items:center;gap:36px}.hero h1 em{font-style:normal;color:var(--blue)}.hero .big{margin:24px 0}.hero-art{background:var(--soft);border-radius:30px;padding:28px;position:relative;text-align:center}.hero-art svg{width:260px;height:290px}.hero-art .pill{background:var(--yellow);color:var(--ink)}.route{display:flex;gap:10px;margin-top:24px}.route span{font-size:18px;padding:8px 12px;background:#fff;border-bottom:3px solid var(--blue);flex:1}.timeline{display:flex;gap:4px;margin:26px 0}.timeline div{flex:1;background:var(--soft);padding:18px 14px;border-top:4px solid var(--blue);font-size:20px}.timeline strong{display:block;font-size:27px}.goal{margin:12px 0;display:flex;gap:16px;align-items:center}
.energy-stage{height:340px;border:1px solid var(--line);background:var(--soft);border-radius:24px;display:grid;place-items:center;position:relative}.energy-ring{width:205px;height:205px;display:grid;place-items:center;border:3px solid #8c99c6;border-radius:50%;transition:background .2s,transform .1s}.energy-ring svg{width:105px;height:130px}.energy-ring.lit{background:var(--yellow);border-color:#a57600;box-shadow:0 0 0 18px #ffe89750}.energy-label{position:absolute;bottom:14px;font-size:19px;font-weight:700}.meter{height:12px;border-radius:10px;background:#dae0ed;overflow:hidden;margin:16px 0}.meter span{display:block;width:0;height:100%;background:var(--blue)}.sensitivity{display:flex;align-items:center;gap:12px;font-size:18px;margin-top:12px}.sensitivity input{width:140px}.process{display:grid;grid-template-columns:1fr 42px 1.2fr 42px 1fr;align-items:center;gap:10px}.process .card{min-height:240px}.arrow{font-size:36px;color:var(--blue);text-align:center;font-weight:800}.symbol{font-size:42px;margin-bottom:14px;color:var(--blue);font-weight:800}.agents{display:flex;gap:12px}.agent{flex:1;border:2px solid var(--line);background:var(--soft);border-radius:16px;padding:20px 8px;color:var(--ink);text-align:center}.agent.active{border-color:var(--blue);background:#edf0ff}.agent.done{border-color:var(--green);background:#e7f5ed}.agent strong{display:block;font-size:25px}.agent span{font-size:18px}.command-bubble{background:var(--yellow);border-radius:12px;padding:18px;font-size:30px;font-weight:800;margin:20px 0}.score{font-size:40px;font-weight:800;color:var(--blue)}.hw-photo{display:block;width:100%;height:185px;object-fit:contain;background:#fff;border-radius:12px;margin-bottom:12px!important}.hw-mini{height:130px}.image-fallback{display:grid;place-items:center;min-height:130px;border:2px dashed var(--line);font-size:20px}.prompt{border-left:5px solid var(--blue);background:var(--soft);padding:20px;font-size:24px;line-height:1.65;user-select:text}.copy-status{font-size:20px;min-height:60px}.steps{counter-reset:step}.steps p{display:flex;align-items:center;gap:16px;margin:16px 0}.steps p:before{counter-increment:step;content:counter(step);display:grid;place-items:center;flex:0 0 34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;font-size:19px}.workspace{display:grid;grid-template-columns:150px 1fr;gap:12px;background:#edf0f6;padding:18px;border-radius:18px;margin-top:14px}.workspace .categories{font-size:19px;line-height:2.4}.workspace .canvas{background:#fff;padding:18px;border-radius:12px;font-size:21px}.mini-block{background:#e5dffc;border-left:5px solid #7353af;padding:8px 12px;margin:6px 0;border-radius:7px}.block-board{background:var(--soft);border-radius:18px;padding:20px}.block-pieces{display:flex;flex-wrap:wrap;gap:8px;min-height:95px}.block-piece{border:1px solid #bf941d;border-radius:7px;background:var(--yellow);font-size:18px!important;padding:10px 12px;color:#172139}.block-piece.control{background:#e3dafa;border-color:#9c84c8}.block-piece.wait{background:#cce9ff;border-color:#7aaacb}.block-stack{margin-top:12px;border:2px dashed #98a6c2;padding:12px;border-radius:10px;min-height:218px;font-size:19px}.loop-body{border-left:6px solid #886ab8;padding-left:14px;margin-left:10px}.stack-block{padding:3px 10px;background:#ffedb2;border-radius:5px;margin:3px 0;font-size:18px}.stack-loop{font-weight:800;color:#654090;font-size:19px}.sim-led{display:inline-block;width:20px;height:20px;border-radius:50%;background:#7c8696;vertical-align:middle;border:2px solid #526078}.sim-led.on{background:var(--yellow);border-color:#8a6700}.diagnosis label{display:flex;gap:16px;padding:17px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;font-size:22px}.diagnosis input{width:22px;height:22px;flex:none;accent-color:var(--blue)}.diagnosis label.checked{background:#e8f4ed;border-color:var(--green)}.prescription{display:block;font-size:18px;color:var(--muted);margin-top:6px}.badge-card{border:1px solid var(--line);background:var(--soft);border-radius:16px;padding:20px;text-align:left;color:var(--ink);height:210px}.badge-card[aria-pressed=true]{background:#e8f4ed;border:2px solid var(--green)}.badge-card strong{display:block;font-size:25px}.badge-card .badge-answer{font-size:19px;margin-top:12px;display:block}.quiz-row{display:flex;gap:12px;margin:16px 0}.quiz-result{font-size:22px;min-height:65px}.exit-list p{padding:16px 20px;border-bottom:1px solid var(--line)}.closing{background:var(--blue);color:#fff;border-radius:24px;padding:40px;height:490px}.closing h1,.closing h2{color:#fff}.closing h1{font-size:56px}.closing .phase{color:var(--yellow)}
.toolbar{position:fixed;bottom:0;left:0;right:0;height:64px;display:flex;align-items:center;justify-content:space-between;gap:10px;padding:8px 20px;background:#fff;border-top:1px solid var(--line);z-index:30;font-size:16px}.toolbar .tools{display:flex;align-items:center;gap:8px}.toolbar button,.toolbar select{border:1px solid #c1cada;background:#fff;color:var(--ink);border-radius:7px;padding:7px 10px;min-height:40px;font-size:15px}.toolbar select{max-width:275px}.toolbar .primary{background:var(--blue);color:#fff}.toolbar output{font-variant-numeric:tabular-nums;min-width:45px}.teacher-panel{position:fixed;inset:10% 12% 90px;background:#fff;z-index:50;border:2px solid var(--blue);box-shadow:0 20px 80px #14234455;border-radius:18px;padding:28px;overflow:auto;font-size:21px}.teacher-panel h2{margin:0 0 18px}.teacher-panel .panel-head{display:flex;justify-content:space-between;align-items:center}.teacher-panel button{padding:10px 18px;font-size:18px}.teacher-panel p{line-height:1.7}.notes{display:none}.export-only{display:none}.boot-note{padding:14px 24px;background:#fff0c5;font-size:18px}.reveal:not(.ready) .slides>section{display:block;position:relative;margin-bottom:20px}.reveal:not(.ready){overflow:auto;height:auto}.reveal:not(.ready) .slides{position:static;transform:none!important;width:100%!important;height:auto!important}
body.export .toolbar,body.export .interactive-only{display:none!important}body.export .reveal{height:100%}body.export .export-only{display:block}body.export .badge-answer{display:block!important}body.export .quiz-result{display:none}body.export .btn{pointer-events:none}body.export .reveal .progress{display:none}
@media(max-width:700px),(max-height:500px){.toolbar{height:110px;flex-wrap:wrap;justify-content:center;padding:7px}.toolbar .tools{gap:5px}.toolbar select{max-width:200px}.toolbar .optional{display:none}.reveal{height:calc(100% - 110px);font-size:18px;overflow-y:auto}.reveal .slides{width:100%!important;height:100%!important;left:0!important;top:0!important;margin:0!important;transform:none!important}.reveal .slides>section{padding:20px 20px 35px!important;height:100%!important;overflow-y:auto!important}.reveal h1{font-size:38px}.reveal h2{font-size:29px;margin-bottom:20px}.reveal h3{font-size:23px}.topline{font-size:12px;gap:10px}.grid2,.grid3,.grid4,.hero{grid-template-columns:1fr;gap:16px}.hero{height:auto;padding-top:22px}.hero-art svg{height:160px;width:160px}.hero .big,.big{font-size:23px}.card{padding:18px}.footer-note{position:static;margin-top:22px;font-size:16px}.timeline{flex-wrap:wrap}.timeline div{min-width:42%;padding:12px;font-size:16px}.timeline strong{font-size:21px}.small{font-size:17px}.process{grid-template-columns:1fr}.process .card{min-height:0}.process .arrow{transform:rotate(90deg);font-size:25px}.energy-stage{height:260px}.energy-ring{width:165px;height:165px}.energy-ring svg{height:95px}.prompt{font-size:20px}.btn{font-size:17px!important}.hw-photo{height:170px}.agents{gap:7px}.agent{padding:16px 4px}.agent strong{font-size:21px}.workspace{grid-template-columns:100px 1fr;padding:10px}.workspace .canvas{padding:10px;font-size:17px}.workspace .categories{font-size:15px}.closing{height:auto;padding:25px}.closing h1{font-size:35px}.badge-card{height:auto;min-height:140px}.teacher-panel{inset:3% 4% 120px;padding:20px;font-size:18px}.quiz-row{flex-wrap:wrap}.status{min-height:0}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.toolbar,.teacher-panel,.interactive-only,.boot-note{display:none!important}.export-only{display:block}.badge-answer{display:block!important}body{background:#fff}.reveal .slides>section{box-shadow:none}*{-webkit-print-color-adjust:exact;print-color-adjust:exact}}
@page{size:13.333333in 7.5in;margin:0}
@media print{html,body{width:1280px!important;height:auto!important;overflow:visible!important}.reveal,.reveal .slides{width:1280px!important;height:auto!important;position:static!important;transform:none!important;zoom:1!important;margin:0!important;overflow:visible!important}.reveal .slides>section{display:block!important;position:relative!important;left:0!important;top:0!important;width:1280px!important;height:720px!important;min-height:720px!important;margin:0!important;transform:none!important;opacity:1!important;visibility:visible!important;break-after:page!important;page-break-after:always!important}.reveal .slides>section:last-child{break-after:auto!important}.reveal .backgrounds,.reveal .progress{display:none!important}}
@media print{body> :not(main){display:none!important}.reveal .slides>section:last-of-type{page-break-after:auto!important;break-after:auto!important}.aria-status{display:none!important}}
@media screen and (max-width:700px),screen and (max-height:500px){.reveal{touch-action:pan-y pinch-zoom}.reveal .slides>section{overscroll-behavior-y:contain}}
/* Controls overlay the full presentation; reveal them only at the bottom or by Tab. */
@media screen{.reveal{height:100%}.reveal .progress{display:none}.toolbar{transform:translateY(100%);opacity:0;pointer-events:none;transition:transform .18s ease,opacity .18s ease}.controls-visible .toolbar,.toolbar:focus-within{transform:translateY(0);opacity:1;pointer-events:auto}.controls-hotspot{position:fixed;bottom:0;left:0;right:0;height:16px;z-index:29}.export .controls-hotspot{display:none}}


.control-chain{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:26px 0}.control-chain>div{border-top:5px solid #2538a8;background:#f0f3fa;padding:20px 14px;min-height:130px}.control-chain b{display:block;color:#2538a8;font-size:18px;margin-bottom:12px}.control-chain strong{font-size:25px}.scene{display:flex;align-items:center;justify-content:space-around;margin:20px 0 30px;gap:20px}.scene>div{border:3px dashed #2538a8;padding:25px 55px;text-align:center}.scene span,.scene strong{display:block}.scene strong{font-size:36px;margin-top:12px}.circuit-strip{margin:26px 0;padding:20px;background:#f9df7b;text-align:center;font-size:30px;font-weight:bold}.magnet-art{background:#2538a8;color:white;border-radius:30px;padding:30px;text-align:center}.magnet-art strong{display:block;font-size:68px}.magnet-art span{font-size:24px}.magnet-art .rule{margin:16px 0}.control-chain+ .grid2 p{font-size:25px}.export #orderProgress{display:none}.export #orderStatus{font-size:26px}.export #quizResult{display:none}.reveal p{margin-top:12px;margin-bottom:12px}@media(max-width:700px),(max-height:500px){.control-chain{grid-template-columns:1fr 1fr}.control-chain strong{font-size:20px}.control-chain>div{min-height:90px;padding:12px}.scene{flex-direction:column}.scene>div{padding:18px}.circuit-strip{font-size:19px}.magnet-art strong{font-size:40px}}

.photo-hero,.picture-split{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center}.photo-hero{margin-top:28px;grid-template-columns:1.25fr 1fr}.photo-hero h1{font-size:62px}.lesson-picture{margin:0!important;width:100%}.lesson-picture img{display:block;width:100%;height:340px;object-fit:contain;border-radius:14px;background:#edf2fa;margin:0!important;max-width:100%!important;max-height:none!important}.photo-hero img{height:440px;object-fit:cover}.picture-split img[src$=".jpg"]{object-fit:cover}.picture-split .historic img{object-fit:contain}.lesson-picture figcaption{font-size:14px;line-height:1.4;color:#536176;margin-top:7px}.lesson-picture a{color:#2538a8}.grid3 .lesson-picture img{height:260px}.grid2 .lesson-picture img{height:300px}.solution-steps{display:flex;justify-content:space-around;gap:15px;margin:40px 0;padding:32px;background:#2538a8;color:#fff;border-radius:18px;font-size:34px;font-weight:700}.video-layout{display:grid;grid-template-columns:1.75fr 1fr;gap:28px}.video-layout[hidden],#videoAlternative[hidden]{display:none!important}#videoMount{height:365px;position:relative;background:#111c30;border-radius:14px;overflow:hidden}#videoMount>img{width:100%;height:100%;object-fit:contain;margin:0}#videoPlay{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);white-space:nowrap}.video-shell video{width:100%;height:100%;object-fit:contain}.video-prompts p{font-size:24px;margin:0 0 20px}.video-prompts .btn{font-size:19px!important;margin-top:12px}#videoStatus,.media-credit{font-size:17px!important;line-height:1.45}.export .video-layout{display:none!important}.export #videoAlternative{display:block!important}.export #videoAlternative button{display:none}.export #videoAlternative .lesson-picture img{height:300px}@media(max-width:700px),(max-height:500px){.photo-hero,.picture-split,.video-layout{grid-template-columns:1fr;gap:18px}.photo-hero h1{font-size:42px}.lesson-picture img,.photo-hero img{height:240px}.solution-steps{font-size:23px;padding:18px;flex-wrap:wrap}#videoMount{height:260px}.grid3 .lesson-picture img{height:200px}}@media print{.video-layout{display:none!important}#videoAlternative{display:block!important}#videoAlternative button{display:none!important}}

.coil-lesson{display:grid;grid-template-columns:1.55fr 1fr;gap:42px;align-items:center;margin-top:18px}.coil-kicker{font-size:22px!important;font-weight:600;color:#52647c;margin:0 0 4px!important}.coil-visual .lesson-picture img{height:315px;background:transparent;border-radius:0}.coil-visual figcaption{font-size:15px}.coil-explain{border-left:1px solid #dce2eb;padding-left:30px}.coil-explain>div{position:relative;padding-left:38px;margin:0 0 24px}.coil-explain>div:last-child{margin-bottom:0}.coil-explain span{position:absolute;left:0;top:3px;color:#9a6324;font-size:18px;font-weight:700}.coil-explain h3{font-size:26px;margin:0 0 7px!important}.coil-explain p{font-size:21px;line-height:1.5;margin:0!important;color:#52647c}.coil-takeaway{display:flex;align-items:center;gap:24px;margin-top:24px;padding:20px 26px;background:#2538a8;color:#fff;border-radius:12px}.coil-takeaway span{font-size:19px;white-space:nowrap;color:#e0e7ff}.coil-takeaway strong{font-size:27px}@media(max-width:700px),(max-height:500px){.coil-lesson{grid-template-columns:1fr;gap:16px}.coil-kicker{font-size:19px!important}.coil-visual .lesson-picture img{height:auto}.coil-explain{border-left:0;border-top:1px solid #dce2eb;padding:16px 0 0}.coil-explain>div{margin-bottom:14px}.coil-explain h3{font-size:23px}.coil-explain p{font-size:19px}.coil-takeaway{align-items:flex-start;flex-direction:column;gap:7px;padding:17px;margin-top:18px}.coil-takeaway strong{font-size:23px}}

#cover .topline,#observe .topline,#challenge .topline{display:none}#cover{background:#f6f8fd}.brand-cover{height:100%;display:flex;justify-content:center;flex-direction:column;position:relative;padding-left:58px;isolation:isolate}.brand-cover h1{font-size:110px!important;letter-spacing:-3px;margin:0 0 26px!important;color:#2538a8}.brand-cover p{font-size:45px;letter-spacing:10px;margin:0!important}.brand-stroke{width:70px;height:12px;background:#efc651;margin-bottom:35px}.brand-orbit{position:absolute;right:-95px;top:60px;width:390px;height:390px;border:45px solid #e4e9f6;border-radius:50%;z-index:-1}.brand-orbit:after{content:'';position:absolute;right:24px;bottom:-65px;width:60px;height:60px;background:#efc651;border-radius:50%}#observe{padding:0!important}.scene-photo{display:block;width:100%!important;height:720px!important;object-fit:cover;margin:0!important;max-width:none!important;max-height:none!important;border:0}.open-question{height:100%;display:flex;align-items:center;gap:32px}.open-question h1{font-size:60px;line-height:1.4;flex:1.2}.open-question figure{flex:1}.open-question .lesson-picture img{background:transparent;height:350px}.magnet-problem h3{font-size:32px}.magnet-problem .big{font-size:30px}.problem-result p{font-size:26px;color:#8d3426;font-weight:600}.system-flow{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:30px}.system-flow>div{position:relative;background:#f0f3fa;border-top:5px solid #2538a8;border-radius:0 0 14px 14px;padding:22px}.system-flow>div:not(:last-child):after{content:'→';position:absolute;right:-25px;top:45%;font-size:25px;color:#2538a8}.system-number{font-size:20px;color:#52647c;font-weight:600}.system-flow h3{font-size:31px;margin:20px 0 12px}.system-flow p{font-size:24px;line-height:1.5}.role-symbol{height:68px;display:flex;align-items:center;font-weight:700;color:#2538a8}.sensor-symbol{font-size:58px}.controller-symbol{font-size:29px}.actuator-symbol{font-size:27px}.electronic-flow h3{margin-top:6px}.power-route{margin-top:24px;display:flex;gap:24px;align-items:center;padding:20px 24px;background:#fff3cc;border-radius:12px;font-size:23px}.power-route b{white-space:nowrap}.role-note{font-size:21px!important;color:#52647c;margin-top:20px!important}.auto-input{display:flex;gap:15px;align-items:center;padding:15px 20px;background:#edf2fa;border-radius:12px}.auto-input>span{font-size:21px;font-weight:600}.auto-input .btn{font-size:21px}.auto-input .btn[aria-pressed=true]{box-shadow:inset 0 0 0 3px #c58d23}.sim-context{font-size:25px!important}.auto-status{margin-top:18px}.auto-status>div{padding:18px;min-height:180px}.auto-status h3{font-size:25px}.auto-status .btn{font-size:22px;padding:10px 15px}.auto-status .quiz-row{margin:16px 0 0;gap:10px}.auto-feedback{font-size:24px!important;min-height:72px;margin-top:22px!important;padding:15px 20px;background:#fff3cc;border-radius:12px}.auto-status>div>span{font-size:20px}.export .auto-input button{display:none}.export .auto-input:after{content:'未到卸货区 / 已到卸货区';font-size:24px}.export #sensorReport{font-size:23px}.export #magnetProblemResult{display:none!important}.closing h1{font-size:48px!important}@media(max-width:700px),(max-height:500px){.brand-cover{padding:70px 10px;min-height:520px}.brand-cover h1{font-size:66px!important;letter-spacing:0}.brand-cover p{font-size:27px;letter-spacing:4px}.brand-orbit{width:200px;height:200px;border-width:25px;right:-70px;top:20px}.scene-photo{height:70vh!important;min-height:350px!important}.open-question{flex-direction:column;align-items:stretch;padding-top:28px;gap:0}.open-question h1{font-size:42px}.open-question .lesson-picture img{height:250px}.system-flow{grid-template-columns:1fr;gap:20px;margin-top:20px}.system-flow>div:not(:last-child):after{content:none}.system-flow h3{font-size:27px}.system-flow p{font-size:22px}.power-route{flex-direction:column;align-items:flex-start;gap:8px;font-size:21px}.auto-input{flex-wrap:wrap;padding:12px}.auto-input .btn{font-size:19px}.auto-status>div{min-height:0}.auto-feedback{font-size:22px!important}.closing h1{font-size:34px!important}}

#cover{background:#f6f8fd}.brand-cover{padding:10px 0 0;justify-content:center;gap:22px}.cover-heading{text-align:center}.brand-cover h1{font-size:62px!important;line-height:1.15;letter-spacing:2px;margin:0 0 14px!important;color:#2538a8}.brand-cover p{font-size:94px;line-height:1.2;font-weight:800;letter-spacing:4px;color:#172139;margin:0!important}.invention-gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;width:100%}.invention-gallery figure{margin:0!important}.invention-gallery img{width:100%;height:245px;display:block;object-fit:contain;border:0;margin:0!important;max-width:100%!important;max-height:none!important}.invention-gallery figcaption{display:flex;align-items:center;justify-content:center;gap:14px;font-size:25px;line-height:1.4;color:#52647c}.invention-gallery strong{color:#2538a8;font-weight:700}.invention-gallery span{border-left:2px solid #c6d0e4;padding-left:14px}@media(max-width:700px),(max-height:500px){.brand-cover{padding:24px 0;min-height:0;gap:24px}.brand-cover h1{font-size:39px!important;letter-spacing:0}.brand-cover p{font-size:47px;letter-spacing:0;white-space:nowrap}.invention-gallery{grid-template-columns:1fr;gap:22px}.invention-gallery img{height:220px}.invention-gallery figcaption{font-size:23px}.cover-heading{text-align:center}}

.magnet-problem{grid-template-columns:1fr 1fr;gap:48px;margin-top:24px;align-items:start}.magnet-problem .lesson-picture img{height:390px}.magnet-discussion{padding-top:18px}.magnet-discussion h3{font-size:32px;line-height:1.5;margin:0 0 22px}.magnet-stage{min-height:166px;border-top:3px solid #efc651;padding-top:12px}.magnet-stage .big{font-size:30px;font-weight:600;line-height:1.5}.magnet-stage [hidden],.magnet-actions [hidden]{display:none!important}.magnet-actions{display:flex;gap:12px;align-items:center}.magnet-actions .btn{font-size:20px;padding:12px 18px}.problem-result p{color:#172139;font-size:27px;line-height:1.45}.problem-result strong{color:#2538a8}.magnet-stage> :not([hidden]){animation:magnet-reveal .3s ease-out}@keyframes magnet-reveal{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media(prefers-reduced-motion:reduce){.magnet-stage> :not([hidden]){animation:none}}@media(max-width:700px),(max-height:500px){.magnet-problem{grid-template-columns:1fr;gap:16px}.magnet-problem .lesson-picture img{height:280px}.magnet-discussion{padding-top:0}.magnet-stage{min-height:0;margin-bottom:20px}.magnet-discussion h3{font-size:27px}.magnet-stage .big,.problem-result p{font-size:25px}}

#bigmagnet h2{display:flex;align-items:baseline;flex-wrap:wrap;gap:0;line-height:1.12;margin-bottom:18px}.growing-magnet{display:inline-flex;align-items:baseline;white-space:nowrap;gap:.045em;margin-right:.14em}.growing-magnet span:nth-child(1){font-size:1em}.growing-magnet span:nth-child(2){font-size:1.3em}.growing-magnet span:nth-child(3){font-size:1.65em}.magnet-title-rest{white-space:nowrap}#bigmagnet .magnet-problem{margin-top:12px}

#demo .grid2{gap:28px;margin-top:12px}#demo .lesson-picture img{height:255px}#demo .grid2 p{font-size:23px;margin:8px 0;line-height:1.4}#demo .grid2 h3{font-size:28px;margin:0 0 10px}#demo .quiz-row{margin:14px 0 0}#demo .today-device{margin-top:16px;padding:15px 22px}#demo .today-device strong{font-size:25px}#demo>.small{font-size:18px;margin:12px 0 8px}#demo>.export-only{font-size:20px;margin:6px 0}@media(max-width:700px),(max-height:500px){.manual-sequence{grid-template-columns:1fr;gap:18px}.manual-card{display:none}.manual-card.is-shown,.export .manual-card{display:block}.manual-card img{height:190px}.manual-card h3{font-size:26px}.manual-controls{flex-wrap:wrap}.manual-controls .btn{font-size:18px}#demo .lesson-picture img{height:235px}#demo .today-device strong{font-size:22px}}

.kit-intro{display:grid;grid-template-columns:350px 1fr;gap:48px;align-items:center;margin-top:16px}.kit-reference{margin:0!important}.kit-photo-crop{width:100%;aspect-ratio:0.75;position:relative;overflow:hidden;border-radius:14px;background:#cfe8f3}.kit-photo-crop img{position:absolute;width:100%;max-width:none!important;max-height:none!important;height:auto;left:0;top:-28%;margin:0!important}.kit-reference figcaption{font-size:14px;color:#52647c;margin-top:8px}.kit-parts{display:grid;gap:20px}.kit-parts>div{display:flex;gap:20px;align-items:flex-start}.kit-parts>div>span{font-size:19px;font-weight:700;color:#2538a8;background:#edf2fa;padding:12px;border-radius:10px}.kit-part-copy{padding:0}.kit-parts h3{font-size:29px;margin:0 0 9px}.kit-parts p{font-size:24px;line-height:1.45;margin:0}@media(max-width:700px),(max-height:500px){.kit-intro{grid-template-columns:1fr;gap:22px}.kit-reference{max-width:330px;margin:auto!important}.kit-parts h3{font-size:25px}.kit-parts p{font-size:22px}}

.clean-kit{grid-template-columns:520px 1fr;gap:50px}.kit-cutout-scene{height:440px;display:flex;align-items:center;justify-content:center;background:#fff;border-radius:18px;padding:12px}.kit-cutout-scene img{width:100%;height:100%;object-fit:contain;margin:0!important;max-height:none!important}.clean-kit .kit-parts{gap:22px}.clean-kit .kit-parts h3{font-size:28px}.clean-kit .kit-parts p{font-size:23px}.wiring-figure img{height:300px;background:transparent}.wiring-captions{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:12px}.wiring-captions p{font-size:22px!important;margin:0!important;line-height:1.5}.wiring-captions b{color:#2538a8}.wiring-rule{background:#fff3cc;border-radius:12px;padding:17px 22px;margin-top:22px}.wiring-rule strong{font-size:25px}.wiring-rule p{font-size:18px;margin:8px 0 0!important}@media(max-width:700px),(max-height:500px){.clean-kit{grid-template-columns:1fr}.clean-kit .kit-reference{max-width:none;width:100%}.kit-cutout-scene{height:330px}.wiring-figure img{height:230px}.wiring-captions{grid-template-columns:1fr;gap:10px}.wiring-rule strong{font-size:22px}}

#control>h2{font-size:42px;margin-bottom:12px}
.decision-head,.decision-row,.role-mapping{display:grid;grid-template-columns:1fr 1.46fr .91fr;gap:30px}
.decision-head{margin-bottom:10px;color:#2538a8;font-size:25px;font-weight:700}
.decision-head>span{display:flex;align-items:center;gap:12px;padding-left:18px}
.decision-head svg{width:38px;height:30px;fill:none;stroke:currentColor;stroke-width:3;flex-shrink:0}
.decision-row{padding:12px 18px;align-items:center;border-radius:12px;min-height:116px;margin-bottom:12px;background:#edf2fa}
.decision-row-1{background:#fff4d3}
.decision-row p{font-size:24px;line-height:1.4;margin:0!important}
.decision-phase{font-size:17px;letter-spacing:2px;font-weight:700;color:#52647c;display:block;margin-bottom:5px}
.decision-rule{position:relative;border-left:2px solid #ccd5e5;padding-left:22px}
.decision-rule:before{content:'→';position:absolute;left:-21px;top:38%;background:#edf2fa;color:#2538a8;font-size:25px}
.decision-row-1 .decision-rule:before{background:#fff4d3}
.decision-output{border-left:2px solid #ccd5e5;padding-left:24px;position:relative}
.decision-output:before{content:'→';position:absolute;left:-21px;top:35%;background:#edf2fa;color:#2538a8;font-size:25px}
.decision-row-1 .decision-output:before{background:#fff4d3}
.decision-output b{font-size:29px;color:#2538a8;display:block;margin-bottom:5px}
.mapping-intro{font-size:20px!important;margin:13px 0 9px!important;color:#52647c}
.role-mapping{gap:30px;padding:0 18px}
.role-frame{border:2px solid #2538a8;border-radius:10px;padding:11px 14px;background:#fff}
.role-frame h3{font-size:27px;margin:0 0 5px!important;color:#2538a8}
.role-frame p{font-size:19px;margin:0!important;line-height:1.4}
#control [data-role-stage]{visibility:hidden}#control [data-role-stage].is-shown,.export #control [data-role-stage]{visibility:visible}
.mapping-power{font-size:18px!important;color:#52647c;margin:10px 0!important}
.mapping-controls{display:flex;align-items:center;gap:14px;margin-top:10px}
.mapping-controls .btn{font-size:20px;padding:11px 19px}.mapping-controls>span{font-size:18px;color:#52647c}.mapping-human{margin-left:auto}
@media(max-width:700px),(max-height:500px){#control>h2{font-size:32px}.decision-head{display:none}.decision-row{grid-template-columns:1fr;gap:15px;padding:20px}.decision-rule,.decision-output{border-left:0;border-top:1px solid #ccd5e5;padding:16px 0 0}.decision-rule:before,.decision-output:before{content:none}.decision-input:before{content:'眼睛看到';font-size:20px;color:#2538a8;font-weight:700}.decision-rule:before{content:'大脑想到';display:block;position:static;font-size:20px;font-weight:700;background:none;margin-bottom:7px}.decision-output:before{content:'电磁铁动作';display:block;position:static;font-size:20px;font-weight:700;background:none;margin-bottom:7px}.decision-phase{display:inline;margin-left:12px}.decision-row p{font-size:24px}.role-mapping{grid-template-columns:1fr;padding:0;gap:12px}.mapping-controls{flex-wrap:wrap}.mapping-human{width:100%;margin:0}.mapping-intro,.mapping-power{line-height:1.5}}