@layer studies{:root{--ink: #162b40;--blue: #245f9d;--red: #b33a41;--muted: #536477;--sans: "Noto Sans CJK SC", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--text-body: clamp(18px, 1.85cqw, 36px);--text-lead: clamp(25px, 2.6cqw, 48px);--text-note: clamp(17px, 1.53cqw, 30px);--text-caption: clamp(12px, 1.03cqw, 20px);--group-gap: 3.5cqh;--inside-gap: 1.2cqh}::selection{background:#f5d984;color:#162b40}.slide{padding:3.2cqh 4cqw 1.6cqh;gap:1.7cqh}.slide-head{padding-bottom:1cqh}.slide-head:after{display:none}.slide-head h2{font-size:3.22cqw;font-weight:700;letter-spacing:0;line-height:1.25;text-wrap:pretty}.slide-body{padding:1.1cqh 0 1cqh;line-height:1.55}.slide-body h3{font-family:var(--sans);font-size:var(--text-lead);font-weight:500;line-height:1.3;margin:0}.slide-body p{margin:0;font-size:var(--text-body);line-height:1.65;text-wrap:pretty}.slide-footer{color:#5b6a77}.chrome{padding:2px 7px;border:0;background:#fff;bottom:.9cqh;gap:5px}.chrome button{border-radius:3px}.chrome button:focus-visible{outline:2px solid var(--blue)}.chrome button:hover{background:#eaf1f9}.chrome #counter{display:none}.progress-track{height:2px;background:#e2e9ee}.progress-track i{background:var(--blue)}.slide-body .hand-note{font:400 var(--text-note)/1.65 var(--hand);color:var(--blue)}.neat-lane{padding-bottom:9cqh}.slide .ann{line-height:inherit;--ann-label-max-width: 28cqw;--ann-color: #245f9d;--ann-rotate: -3deg}.slide .ann:after{font-size:var(--text-note)}.fragment{transition:opacity .22s ease,visibility .22s;transform:none}.fragment.is-visible{animation:none}.slide-study-cover .slide-body{grid-template-columns:1.25fr 1fr;gap:0;align-items:center}.study-cover-copy{z-index:1;display:flex;flex-direction:column;gap:4cqh;padding-top:1cqh}.study-cover-copy h1{font-size:4.65cqw;line-height:1.36;letter-spacing:0;font-weight:700;margin:0}.study-cover-copy .study-subtitle{color:var(--muted);font-size:2cqw;line-height:1.7}.study-cover-copy .study-cover-question{margin-top:4cqh;font-size:var(--text-note)}.study-cover-copy .neat-lane{padding-bottom:9cqh}.slide-study-cover .watercolor{width:100%;margin-left:0}.study-history{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:5cqw;height:100%}.history-scene{display:flex;flex-direction:column;min-height:0}.history-date{display:flex;align-items:baseline;gap:1.8cqw}.history-date strong{font:700 6.8cqw/1.15 var(--sans);color:var(--blue);font-variant-numeric:lining-nums tabular-nums;letter-spacing:-.035em}.history-date span{font:400 var(--text-note)/1.55 var(--sans);max-width:8em}.history-scene .watercolor{flex:1;min-height:0}.history-argument{display:flex;flex-direction:column;padding:3cqh 0 2cqh;gap:4cqh}.history-problem{display:flex;flex-direction:column;gap:1.8cqh}.history-problem h3{font-size:2.35cqw}.history-problem p{color:var(--muted)}.history-turn{display:flex;flex-direction:column;gap:.6cqh;padding-block:1.5cqh}.history-turn h3{font-size:3.65cqw;margin:.5cqh 0}.history-consequence{margin-top:auto!important;padding-top:2.2cqh;border-top:1px solid #cbd6df}.slide-study-generation .lab-grid,.slide-study-training .lab-grid{height:100%;grid-template-columns:minmax(0,1.45fr) minmax(0,1fr);gap:4cqw}.lab-surface{padding:3cqh 2.5cqw;background:#eef4fa;border:0;border-radius:0}.lab-surface .small-label{color:#46627e;font-family:var(--sans);letter-spacing:0;font-weight:500;font-size:var(--text-note)}.lab-explanation{justify-content:flex-start;gap:3.2cqh;padding:2.5cqh 0 0}.lab-explanation h3{font-size:2.5cqw}.lab-explanation .explain-list{padding-left:1.4em;margin:0;font-size:var(--text-note);line-height:1.75}.explain-list li+li{margin-top:1.6cqh}.lab-explanation .hand-note{margin-top:auto;padding-top:2cqh}.slide-study-generation .live-sentence{font-size:3.5cqw;min-height:15cqh;line-height:1.6;margin:3cqh 0 1cqh}.choice-row{gap:1.2cqw;margin-block:2cqh 3cqh}.choice-row button{padding:1.2cqh 1.5cqw;border:1px solid #93b2d0;background:#fff;font-size:2cqw;color:var(--blue)}.choice-row button:hover{background:#dce9f7}.demo-toolbar button{min-height:40px;font-size:var(--text-note);padding:.8cqh 1cqw;border-radius:3px}.lab-surface .demo-caption{font-size:var(--text-caption);line-height:1.5;color:#4d6480}.lab-surface>.demo-caption{margin-top:auto;padding-top:2cqh}.lab-explanation .study-margin-note{font-family:var(--sans);font-size:var(--text-note)}.lab-explanation .neat-lane{padding-bottom:9.5cqh}.slide-study-training .training-prompt{font-size:2.6cqw;line-height:1.55;margin:3cqh 0}.slide-study-training .training-bars{margin:1cqh 0 4cqh;gap:3.6cqh}.training-row{font-variant-numeric:tabular-nums}.training-track{border-radius:0;background:#d8e3ef}.training-track span{border-radius:0}.training-row.is-target,.slide-study-training [data-training-answer]{color:var(--blue)}.training-row.is-target .training-track span{background:var(--blue)}.training-row.is-target>span{animation:answer-update .55s ease-out}@keyframes answer-update{0%{background:#f5d984}to{background:transparent}}@media (prefers-reduced-motion: reduce){.training-row.is-target>span{animation:none}}.slide-study-training .parameter-note{border:0;padding:0;font-size:var(--text-note)}.slide-study-training .lab-explanation{gap:3cqh}.study-iteration-board{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:4cqw}.iteration-steps{display:flex;flex-direction:column;gap:3cqh;padding:2cqh 0}.iteration-steps>div{display:flex;flex-direction:column;gap:1cqh}.iteration-steps>div+div{border-top:1px solid #d1dce5;padding-top:2.4cqh}.iteration-steps h3{font-size:2.35cqw}.iteration-steps .neat-lane{padding-bottom:8cqh}.study-conclusion{padding-top:1.6cqh;border-top:1px solid #cbd6df;font-size:var(--text-note)!important}.study-spatial-board{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:5cqw}.spatial-reading{display:flex;flex-direction:column;justify-content:center;gap:4.5cqh;padding:0}.spatial-reading>div{display:grid;grid-template-columns:6.6cqw minmax(0,1fr);gap:1.8cqw;align-items:baseline}.spatial-reading h3{font-size:2cqw;color:var(--blue)}.spatial-reading .neat-lane{grid-column:2}@media (max-width:600px) and (orientation:portrait){.slide{padding:20px 18px 58px}.slide-head h2{font-size:28px}.slide-body h3,.lab-explanation h3,.history-problem h3,.iteration-steps h3,.spatial-reading h3{font-size:24px}.study-cover-copy h1{font-size:34px}.study-cover-copy .study-subtitle,.history-date span{font-size:20px}.study-history,.study-iteration-board,.study-spatial-board{display:flex;flex-direction:column;gap:24px}.history-date strong{font-size:64px}.history-turn h3{font-size:32px}.slide-study-cover .watercolor{width:100%;margin-left:0}.slide-study-generation .lab-grid,.slide-study-training .lab-grid{display:flex;flex-direction:column;gap:24px}.slide-study-generation .live-sentence,.slide-study-training .training-prompt{font-size:28px}.choice-row button{font-size:22px}.spatial-reading>div{grid-template-columns:80px 1fr}.slide .ann{--ann-label-max-width: 240px}.neat-lane,.lab-explanation .neat-lane,.iteration-steps .neat-lane{padding-bottom:80px}}}@layer lecture{:root{--paper: #fff;--ink: #172e43;--blue: #245f9d;--red: #b13b43;--muted: #52677c;--line: #cbd7e2;--blue-soft: #eaf2fa;--text-body: clamp(18px, 1.85cqw, 37px);--text-lead: clamp(26px, 2.65cqw, 49px);--text-note: clamp(17px, 1.55cqw, 30px);--text-caption: clamp(12px, 1.04cqw, 20px)}body{color:var(--ink)}.stage{background:#fff}.slide{padding:3.3cqh 3.8cqw 1.4cqh;gap:1.8cqh}.slide-head{padding-bottom:1cqh}.slide-head h2{font:700 3.08cqw/1.3 var(--sans);letter-spacing:0;text-wrap:pretty}.slide-body{padding:.7cqh 0 1cqh;gap:2cqh;font-family:var(--sans)}.slide-body :is(p,li){font-size:var(--text-body);line-height:1.65}.slide-body h3{font:700 var(--text-lead)/1.35 var(--sans);margin:0;letter-spacing:0}.slide-body p{margin:0}.slide-body b{font-weight:700}.slide .display-thought{font:500 3.35cqw/1.55 var(--sans)}.slide .display-key{font:700 2.9cqw/1.5 var(--sans)}.slide .hand-note{font:400 var(--text-note)/1.65 var(--hand);color:var(--blue)}.lecture-coda{border:0;padding-top:.6cqh;font-size:var(--text-note)!important;line-height:1.55!important;color:var(--muted)}.slide-footer{min-height:34px;color:#5a6b7c}.reading-column{display:flex;flex-direction:column;justify-content:center;gap:4cqh;min-height:0}.idea-group{display:flex;flex-direction:column;gap:1.25cqh}.idea-group h3{font-size:2.25cqw}.lecture-split{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,1fr);gap:4.6cqw;min-height:0}.watercolor{width:100%;min-width:0;min-height:0}.watercolor .figure-open{width:100%;height:100%;min-height:0}.watercolor img{width:100%;height:100%;object-fit:contain;max-height:100%}.neat-lane{padding-bottom:8.6cqh}.slide .ann{--ann-label-max-width: 29cqw;--ann-color: #245f9d;--ann-rotate: -2deg}.slide .ann:after{font-size:var(--text-note);line-height:1.35}.fragment,.fragment.is-visible{transform:none;animation:none}.fragment{transition:opacity .23s ease,visibility .23s}.chrome{background:#fff;padding:2px 5px;border:0;bottom:.9cqh}.chrome button{font-family:var(--sans)}.chrome button:focus-visible{outline:2px solid var(--blue);outline-offset:2px}.slide-body :is(button,a){text-underline-offset:.2em}.slide-body button{transition:background .15s ease,color .15s ease}.slide-body{scrollbar-color:#a8bdd0 transparent;scrollbar-width:thin}.slide-lecture-opening .slide-body{display:block!important}.opening-scene{display:grid;grid-template-rows:auto minmax(0,1fr);height:100%;gap:1cqh}.opening-scene h1{font:700 5.2cqw/1.23 var(--sans);letter-spacing:0;margin:0}.opening-bottom{display:grid;grid-template-columns:1.2fr .75fr;gap:4.8cqw;min-height:0;align-items:stretch}.opening-invitation{display:flex;flex-direction:column;justify-content:center;gap:4cqh;padding-top:3cqh}.opening-invitation>p{font-size:2.6cqw;line-height:1.5;font-weight:500}.opening-invitation .neat-lane p{font-size:var(--text-note)}.story-map{display:flex;flex-direction:column;justify-content:center;gap:3.6cqh}.map-row{display:grid;grid-template-columns:15cqw 1fr;column-gap:3.3cqw;row-gap:1cqh;align-items:baseline;padding:1.4cqh 0}.map-row>span{color:var(--blue);font:400 2cqw/1.5 var(--hand);grid-row:1 / 3}.map-row h3{font-size:2.65cqw}.map-row p{color:var(--muted);font-size:var(--text-note)}.history-board{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:4.7cqw;min-height:0}.history-object{display:grid;grid-template-rows:auto minmax(0,1fr);gap:2cqh;min-height:0}.history-coordinate{display:flex;align-items:center;gap:1.8cqw}.history-coordinate strong{color:var(--blue);font:500 2.9cqw/1.15 var(--sans);font-variant-numeric:lining-nums tabular-nums;letter-spacing:0}.history-coordinate span{font-size:var(--text-note);line-height:1.5;max-width:16em}.history-board .reading-column{gap:3.8cqh}.history-board .display-thought{font-size:3.15cqw}.verb-equation{display:flex;flex-wrap:wrap;gap:1.3cqw;font-size:var(--text-lead);margin-bottom:2cqh}.verb-equation span{color:var(--blue)}.challenge-layout{grid-template-columns:.7fr 1.25fr}.challenge-copy{display:flex;flex-direction:column;justify-content:center;gap:4cqh}.challenge-copy .display-thought{font-size:4.3cqw;line-height:1.45}.challenge-layout .reading-column{gap:1cqh}.challenge-layout .watercolor{flex:1}.slide-lecture-comparison .slide-body{grid-template-rows:1fr .8fr}.learning-contrast{display:grid;grid-template-columns:.85fr 1.35fr;gap:3.5cqw}.learning-contrast>div{padding:2.4cqh 2cqw;display:flex;flex-direction:column;gap:1.7cqh}.learning-contrast>div:first-child{background:#f2f4f6}.learning-contrast>div:last-child{background:#eaf2fa}.learning-contrast .contrast-line{color:var(--blue);font-size:2.1cqw;font-weight:500}.learning-evidence{display:grid;grid-template-columns:.8fr 1.3fr;gap:4cqw;align-items:center;min-height:0}.learning-evidence .watercolor{height:100%}.champion-strip{align-items:center;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:3cqw}.champion-strip>div{display:flex;flex-direction:column;gap:1.2cqh;min-height:0}.champion-strip .watercolor{flex:none;height:36cqh}.champion-strip h3{font-size:2.3cqw}.champion-strip p{font-size:var(--text-note)}.language-sheet{display:grid;grid-template-columns:.95fr 1fr;gap:6cqw;align-items:center}.request-stack{display:flex;flex-direction:column;gap:2.2cqh;transform:rotate(-1deg);padding:3cqh 2.5cqw;background:#edf3f9}.request-stack p{font-size:2.15cqw;padding:2cqh 0;border-bottom:1px solid #c5d5e4}.request-stack p:last-child{border-bottom:0}.language-answer{display:flex;flex-direction:column;gap:3cqh}.language-answer h3{font-size:3.25cqw}.token-scene{display:grid;grid-template-columns:1.08fr 1fr;gap:4cqw;min-height:0}.token-reading{display:flex;flex-direction:column;justify-content:center;gap:4cqh}.token-reading .large-sentence{font-size:3.2cqw;line-height:1.55}.token-strip{gap:.5cqw}.token-strip span{background:#edf3f9;font-size:1.7cqw;padding:.8cqh .55cqw;border:1px solid #bfd1e3;border-radius:3px}.slide .demo-caption{font-size:var(--text-caption);color:var(--muted);line-height:1.5}.lab-grid{height:100%;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:4cqw;min-height:0}.lab-surface{border:0;border-radius:4px;background:#eaf2fa;padding:3cqh 2.6cqw;min-height:0}.lab-explanation{justify-content:center;gap:3cqh;padding:1cqh 0}.lab-explanation h3{font:700 2.75cqw/1.4 var(--sans)}.lab-explanation .explain-list{font-size:var(--text-note);line-height:1.65}.lab-explanation .hand-note{margin-top:auto;font:400 var(--text-note)/1.65 var(--hand)}.lab-explanation .study-margin-note{font-size:var(--text-note)}.live-sentence{font-size:3.25cqw!important;line-height:1.6;min-height:15cqh;margin:3cqh 0 2cqh!important}.choice-row{margin:2cqh 0;gap:1cqw}.choice-row button{font-size:2cqw;min-height:46px}.candidate-probability{display:block;font:400 var(--text-caption)/1.4 var(--sans);color:#526b84;margin-top:.5cqh}.small-label{font:500 var(--text-note)/1.5 var(--sans);letter-spacing:0}.training-prompt{font-size:2.6cqw!important;margin:3cqh 0!important}.training-bars{gap:3cqh;margin:2cqh 0 3cqh}.training-row{font-size:var(--text-note)}.training-track{height:2.2cqh}.training-row.is-target{color:var(--blue)}.training-row.is-target .training-track span{background:var(--blue)}.training-row.is-target>span{animation:answer-update .55s 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1fr;gap:4cqw;align-items:stretch}.train-use-board>div{display:flex;flex-direction:column;justify-content:center;gap:3cqh;padding:3cqh 2.4cqw}.train-use-board>div:first-child{background:#eaf2fa}.train-use-board>div:last-child{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.train-use-board .display-key{font-size:2.3cqw}.slide-lecture-train-use .slide-body{grid-template-rows:auto minmax(0,1fr)}.gpt-key{grid-row:1}.train-use-board{grid-row:2}.gpt-key{display:flex;align-items:baseline;gap:3cqw;padding-top:2cqh;font-size:var(--text-note)}.gpt-key b{color:var(--blue);font-size:3cqw}.gpt-key p{font-size:var(--text-note);margin-left:auto}.response-pair{display:grid;grid-template-columns:1fr 1fr;gap:6cqw;align-items:center}.response-pair>div{display:flex;flex-direction:column;gap:3cqh}.request-quote{font:500 2.5cqw/1.65 var(--sans);padding:3cqh 2cqw;background:#edf3f9;margin-bottom:3cqh!important}.chat-era{display:grid;grid-template-columns:.78fr 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.reading-column{gap:3cqh}.iteration-board{display:grid;grid-template-columns:1fr 1.08fr;gap:4cqw;min-height:0}.iteration-board .reading-column{gap:2.3cqh}.iteration-line{display:grid;grid-template-columns:4.6cqw 1fr;gap:1.5cqw;padding:1.5cqh 0}.iteration-line>span{color:var(--blue);font:700 1.7cqw/1.6 var(--sans)}.iteration-board .neat-lane p{font-size:var(--text-note)}.material-brief{display:flex;flex-direction:column;justify-content:center;gap:4cqh}.material-brief>h3{font-size:3cqw}.material-rows{display:flex;flex-direction:column;gap:0}.material-rows>div{display:grid;grid-template-columns:15cqw 1fr;align-items:baseline;gap:3cqw;padding:2.5cqh 0;border-bottom:1px solid var(--line);font-size:var(--text-body)}.material-rows b{color:var(--blue)}.reaction-grid{min-height:28cqh}.reaction-grid button{height:auto}.watch-sheet{display:flex;flex-direction:column;justify-content:center;gap:3cqh}.watch-sheet>div{display:grid;grid-template-columns:20cqw 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