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:root{--forest:#1b3b31;--paper:#f5f6f0;--lime:#d6e5bc;--ink:#223d32;--muted:#68786a;--line:#d9dfd3;--footer:76px;--header:74px}
*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--paper)}body{margin:0;color:var(--ink);background:var(--paper);font:17px/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;-webkit-font-smoothing:antialiased}
button,a{-webkit-tap-highlight-color:transparent;touch-action:manipulation}button{font:inherit;color:inherit;cursor:pointer}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #9dae62;outline-offset:5px}button:disabled{cursor:default;opacity:.35}
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.skip-link{position:fixed;z-index:100;top:8px;left:12px;padding:10px 18px;background:var(--forest);color:white;transform:translateY(-160%)}.skip-link:focus{transform:translateY(0)}
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#deck{max-width:1536px;margin:0 auto;padding-bottom:var(--footer)}.slide{position:relative;min-height:calc(100svh - var(--header) - var(--footer));padding:clamp(26px,3.3vw,52px) clamp(24px,4.2vw,64px) 24px;animation:appear .35s ease-out}.js .slide[hidden]{display:none!important}.eyebrow{font-size:13px;letter-spacing:.11em;color:var(--muted);font-weight:600;margin-bottom:12px}h1{font-size:clamp(64px,6.2vw,96px);font-weight:780;letter-spacing:-.055em;line-height:1.1}h2{font-size:clamp(32px,3.5vw,52px);line-height:1.23;font-weight:730;letter-spacing:-.045em}h3{font-size:22px;line-height:1.35;font-weight:700}.slide-heading{margin-bottom:clamp(26px,3vw,44px)}.slide-heading.compact{margin-bottom:24px}.lead{font-size:clamp(17px,1.6vw,23px);line-height:1.7;color:#526755}.bottom-note{font-size:12px;color:var(--muted);line-height:1.7;margin-top:26px;padding-top:13px;border-top:1px solid var(--line);max-width:1200px}
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.image-button{padding:0;border:1px solid #dbe1d6;border-radius:6px;background:white;display:block;max-width:100%;width:100%;overflow:hidden;box-shadow:0 16px 44px #1b3b310b}.image-button img{display:block;width:100%;height:auto}.image-button:hover{border-color:#9aac87;box-shadow:0 16px 44px #1b3b3114}figcaption{display:flex;justify-content:space-between;gap:12px;font-size:11px;color:var(--muted);margin-top:12px;line-height:1.6}figcaption span{white-space:nowrap}
.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(36px,7vw,110px)}.audience+.audience{padding-left:clamp(32px,4.3vw,68px);border-left:1px solid var(--line)}.role-heading{display:flex;align-items:center;gap:10px;margin-bottom:16px}.role-symbol{font-size:29px;width:34px;line-height:1}.role-context{font-size:12px;color:var(--muted);margin-left:auto}.audience blockquote{font-size:clamp(24px,2.4vw,36px);line-height:1.55;letter-spacing:-.03em;font-weight:550;margin:18px 0 24px}.plain-dl{font-size:15px;line-height:1.75}.plain-dl>div{display:flex;gap:20px;margin-top:10px}.plain-dl dt{color:#6f805f;white-space:nowrap}.plain-dl dd{color:#3b5242}
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.interface-layout{display:grid;grid-template-columns:minmax(0,1fr) 256px;align-items:start;gap:38px}.screen-figure{min-width:0;max-width:100%}.screen-figure img{object-fit:contain}.side-story{min-width:0}.example-context{font-size:12px;color:var(--muted);margin-bottom:8px}.metric-list>div{padding:12px 0;border-bottom:1px solid var(--line)}.metric-list dt{font-size:13px;color:var(--muted);margin-bottom:2px}.metric-list dd{font-size:clamp(31px,3vw,45px);line-height:1.2;letter-spacing:-.04em;font-variant-numeric:tabular-nums;font-weight:600}.metric-list small{font-size:14px;font-weight:400;letter-spacing:0;margin-left:7px}.metric-list .highlight-metric{color:#486632}.metric-list .highlight-metric small{margin-left:0;margin-right:5px;font-size:22px}.side-explanation{font-size:13px;color:#60735d;line-height:1.85;margin-top:14px}
.operator-layout{grid-template-columns:238px minmax(0,1fr);gap:40px}.large-count{font-size:44px;line-height:1.25;letter-spacing:-.04em;font-weight:650}.large-count span{font-size:14px;letter-spacing:0;font-weight:400;color:var(--muted);margin-left:10px}.change-example{margin-top:23px;padding-top:18px;border-top:1px solid var(--line)}.change-example p{font-size:12px;color:var(--muted);line-height:1.8}.change-example strong{display:block;font-size:37px;letter-spacing:-.035em;color:#6c8145;font-weight:600;margin:7px 0}.change-example strong span{font-size:23px}
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.evidence-layout{display:grid;grid-template-columns:1fr 1fr;gap:clamp(35px,6vw,88px)}.work-list{list-style:none;padding:0}.work-list li{display:grid;grid-template-columns:110px 1fr;gap:15px;padding:15px 0;border-top:1px solid var(--line)}.work-list span{font-weight:600;font-size:17px}.work-list p{font-size:14px;line-height:1.8;color:var(--muted)}.work-attribution{font-size:12px;color:#7e9074;margin-top:21px}.test-number-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:-4px}.test-number-row strong{display:block;font-size:64px;letter-spacing:-.06em;font-weight:620;line-height:1.1}.test-number-row span{display:block;font-size:13px;color:var(--muted);margin-top:10px}.test-explain{font-size:14px;color:var(--muted);line-height:1.85;margin:22px 0}.test-explain strong{font-size:19px;font-weight:600;color:var(--ink)}.validation-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}.validation-details summary{padding:13px 0;cursor:pointer;line-height:1.7}.validation-details summary>span{float:right;font-variant-numeric:tabular-nums;font-size:14px;font-weight:600;color:#687e40}.validation-details>div{padding:0 0 12px;color:var(--muted);line-height:1.85}.validation-details p+p{margin-top:10px}.next-research{font-size:13px;color:#6b7d5e;line-height:1.8;margin-top:17px}
.closing-slide{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(40px,7vw,100px);align-items:center;padding-top:38px;padding-bottom:38px}.closing-slide h2{font-size:clamp(38px,4.2vw,64px);letter-spacing:-.05em}.closing-lead{font-size:18px;color:var(--muted);margin:18px 0 26px}.primary-demo{display:inline-flex;align-items:center;justify-content:space-between;gap:70px;padding:19px 27px;font-size:22px;line-height:1.5;font-weight:650;color:#e5efce;background:var(--forest);text-decoration:none;border-radius:4px;min-height:68px}.primary-demo:hover{background:#315445}.primary-demo>span{font-weight:400;font-size:28px}.try-steps{list-style:none;display:flex;flex-wrap:wrap;gap:11px 20px;padding:0;margin:27px 0 0;font-size:14px;color:#5b7055}.try-steps li{display:flex;align-items:center;gap:8px}.try-steps b{font-weight:550;color:#7c965e;font-size:13px}.closing-main .disclosure{max-width:470px}.resume-block{border-left:1px solid #c9d6ba;padding:4px 0 4px 35px}.resume-label{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:6px;margin-bottom:15px}.resume-label h3{font-size:16px;font-weight:650}.resume-label .quiet-button{font-size:12px}.resume-block>p{font-size:17px;line-height:2;letter-spacing:.015em}.copy-status{font-size:11px;color:var(--muted);display:block;margin-top:18px;min-height:19px}
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dialog{border:1px solid #d8e0cd;background:var(--paper);color:var(--ink);padding:24px;max-width:min(92vw,1200px);max-height:calc(100svh - 36px);box-shadow:0 24px 120px #10241b33;border-radius:8px}dialog::backdrop{background:#0a2018a6;backdrop-filter:blur(5px)}.dialog-heading{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:16px}.dialog-heading h2{font-size:25px;letter-spacing:-.03em}.dialog-heading p{font-size:14px;line-height:1.6;font-weight:600}.dialog-heading .quiet-button{white-space:nowrap;flex:none}.contents-dialog{width:520px}.contents-list{list-style:none;padding:0}.contents-list button{display:flex;align-items:center;gap:20px;min-height:48px;width:100%;border:0;border-top:1px solid var(--line);background:none;text-align:left;font-size:16px;padding:12px 6px}.contents-list button:hover{background:#e8edde}.contents-list span{font-size:12px;color:#91a17e}.image-dialog{width:min(94vw,1300px)}.image-view{overflow:auto;max-height:calc(100svh - 204px);background:white;border:1px solid #dde4d6;overscroll-behavior:contain}.image-view img{display:block;max-width:100%;height:auto;margin:0 auto}.image-view.original-size img{max-width:none;width:auto}.image-tools{display:flex;gap:20px;align-items:center;justify-content:flex-end;font-size:12px;color:var(--muted);margin-top:10px}.image-tools>span{margin-right:auto}.image-tools .quiet-button{font-size:12px}.image-tools a{white-space:nowrap}.modal-open{overflow:hidden}.noscript-note{margin:20px 25px 110px;padding:20px;border:1px solid var(--line)}
@keyframes appear{from{opacity:.4;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){.slide{padding-top:50px}.cover{padding-top:45px;padding-bottom:45px}.cover-figure{padding-top:50px}.interface-layout{grid-template-columns:minmax(0,1fr) 290px}.ai-layout{grid-template-columns:370px minmax(0,1fr)}}
@media(max-width:1100px){.cover{grid-template-columns:.95fr 1.05fr;gap:30px}.brand small{display:none}.cover-figure{padding-top:0}.cover-subject{font-size:28px}.cover .lead{font-size:16px}.interface-layout{grid-template-columns:minmax(0,1fr) 210px;gap:26px}.operator-layout{grid-template-columns:190px minmax(0,1fr)}.ai-layout{grid-template-columns:280px minmax(0,1fr);gap:28px}.design-points h3{font-size:17px}.design-points p{font-size:13px}.work-list li{grid-template-columns:90px 1fr}.work-list span{font-size:15px}.closing-slide{gap:40px}.closing-slide h2{font-size:42px}.resume-block{padding-left:26px}.resume-block>p{font-size:15px}.page-count small{display:none}.page-dots{margin-left:0}.deck-footer{gap:18px}}
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.interface-layout,.operator-layout,.ai-layout,.evidence-layout{display:flex;flex-direction:column;gap:25px}.side-story{width:100%}.metric-list{display:grid;grid-template-columns:1fr 1fr;column-gap:18px}.metric-list>div{padding:10px 0}.metric-list dt{font-size:11px}.metric-list dd{font-size:31px}.metric-list small{font-size:12px}.metric-list .highlight-metric{grid-column:1 / -1;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:13px 0}.metric-list .highlight-metric dt{font-size:13px}.metric-list .highlight-metric dd{font-size:36px}.metric-list .highlight-metric small{font-size:18px}.example-context{font-size:11px;margin-bottom:6px}.side-explanation{font-size:12px;line-height:1.9;margin-top:12px}.operator-story{display:grid;grid-template-columns:1fr 1fr;gap:18px}.operator-story>.side-explanation{grid-column:1 / -1;margin-top:0}.large-count{font-size:40px;line-height:1.35}.large-count span{font-size:11px;margin-left:7px}.change-example{border-top:0;border-left:1px solid var(--line);padding:2px 0 0 19px;margin:0}.change-example p{font-size:10px;line-height:1.8}.change-example strong{font-size:30px;margin:9px 0}.change-example strong span{font-size:18px}.ai-layout{gap:21px}.design-points{width:100%}.design-points li{padding:13px 0;gap:13px}.design-points>li>span{font-size:11px}.design-points h3{font-size:18px}.design-points p{font-size:13px;margin-top:5px}.work-list li{grid-template-columns:94px 1fr;gap:15px;padding:13px 0}.work-list p{font-size:13px}.work-list span{font-size:15px}.work-attribution{font-size:11px;margin-top:14px}.validation-story{width:100%;padding-top:4px}.test-number-row strong{font-size:58px}.test-number-row span{font-size:12px;margin-top:7px}.test-explain{font-size:13px;margin:18px 0}.validation-details{font-size:12px}.validation-details summary{padding:14px 0}.next-research{font-size:12px;margin-top:14px}
.closing-slide{display:block;padding-top:34px}.closing-slide h2{font-size:39px;line-height:1.3}.closing-lead{font-size:16px;margin:18px 0 25px}.primary-demo{width:100%;font-size:21px;min-height:66px;gap:20px;padding:17px 22px}.try-steps{font-size:12px;gap:9px 13px;margin-top:23px}.try-steps li{gap:5px}.try-steps b{font-size:12px}.closing-main .disclosure{font-size:11px;margin-top:17px}.resume-block{margin-top:30px;padding:23px 0 0;border-left:0;border-top:1px solid var(--line)}.resume-label{margin-bottom:12px}.resume-label h3{font-size:14px}.resume-block>p{font-size:14px;line-height:2}.copy-status{font-size:10px;margin-top:14px}.deck-footer{padding:10px 23px calc(10px + env(safe-area-inset-bottom));gap:15px;min-height:var(--footer)}.nav-button{gap:11px;font-size:13px}.page-dots{display:none}.page-count{font-size:12px;gap:5px;margin-left:auto;margin-right:auto}.page-count small{display:none}.image-button{border-radius:4px;box-shadow:0 9px 22px #1b3b310a}
dialog{padding:15px;border-radius:6px;max-width:calc(100vw - 20px)}.dialog-heading{gap:12px;margin-bottom:10px}.dialog-heading p{font-size:12px}.dialog-heading h2{font-size:23px}.image-dialog{width:calc(100vw - 20px)}.image-view{max-height:calc(100svh - 190px)}.image-tools{gap:13px;flex-wrap:wrap;font-size:11px;justify-content:space-between}.image-tools>span{flex:1 0 100%;font-size:10px}.image-tools .quiet-button{font-size:11px}.contents-list button{font-size:15px;padding:12px 5px;min-height:50px}.contents-list span{font-size:11px}.contents-dialog{width:420px}}
@media(max-width:350px){.site-header{padding:0 16px}.brand{font-size:17px;gap:7px}.header-actions{gap:10px}.header-demo{font-size:11px}.slide{padding-left:18px;padding-right:18px}h2{font-size:29px}.role-context{display:none}.operator-story{gap:12px}.change-example{padding-left:13px}.large-count span{font-size:10px}.deck-footer{padding-left:18px;padding-right:18px}.try-steps{display:grid;gap:8px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.slide{animation:none}*{transition:none!important}}
@media print{@page{size:A4 landscape;margin:10mm}body{background:white;font-size:12pt}.site-header,.deck-footer,.skip-link,dialog,.start-button,.header-actions,.copy-status,#copy-resume{display:none!important}#deck{padding:0;max-width:none}.slide,.js .slide[hidden]{display:block!important;min-height:0;padding:10mm 4mm;page-break-after:always;break-after:page;animation:none}.slide:last-child{page-break-after:auto}.cover{display:grid!important;grid-template-columns:1fr 1fr}.cover h1{font-size:48pt}.cover-subject{font-size:24pt}h2{font-size:25pt}.interface-layout,.operator-layout,.ai-layout,.evidence-layout{display:grid!important;grid-template-columns:1fr 1fr;gap:12mm}.screen-figure img,.cover-figure img{max-height:110mm;object-fit:contain}.image-button{border:1px solid #ddd;box-shadow:none}.bottom-note{font-size:8pt}a[href]{text-decoration:underline}.primary-demo{display:inline-block;background:white;color:var(--forest);padding:0;font-size:23pt}.closing-slide{display:grid!important;grid-template-columns:1fr 1fr}.validation-details>div{display:block}.validation-details:not([open])>div{display:block}.validation-details{font-size:9pt}.noscript-note{display:none}}

.interface-status{font-size:13px;line-height:1.8;color:var(--muted);margin:0 0 14px}.interface-status strong{color:var(--forest);font-weight:650}

/* Keep the resident evidence, caption and tariff note above the fixed deck footer.
   The full screenshot stays contained; narrow screens keep natural document flow. */
@media screen and (min-width:761px){
  .interface-slide[data-slide="4"] .screen-figure img{
    max-height:max(180px,calc(100svh - 490px));
    width:100%;height:auto;object-fit:contain;
  }
}

/* Programmatic slide-title focus announces the page without a presentation frame. */
.slide h1:focus,.slide h2:focus{outline:none}
.interface-layout>*,.ai-layout>*,.evidence-layout>*{min-width:0}
@media screen and (min-width:761px){
  /* More specific than the wide-screen .interface-layout rule. */
  .interface-layout.operator-layout{
    grid-template-columns:minmax(0,.40fr) minmax(0,.60fr);
    gap:38px;
  }
  .interface-slide[data-slide="5"] .screen-figure img{
    max-height:max(180px,calc(100svh - 490px));
    width:100%;height:auto;object-fit:contain;
  }
}

@media screen and (min-width:761px){
  /* Reserve the longer online/local-AI disclosure below the full screenshot. */
  .ai-slide[data-slide="6"] .screen-figure img{
    max-height:max(180px,calc(100svh - 520px));
    width:100%;height:auto;object-fit:contain;
  }
}