:root {
  --pc-paper: #f5f2eb;
  --pc-paper-2: #ebe7de;
  --pc-ink: #191a1d;
  --pc-muted: #6d6b66;
  --pc-line: #c8c3b9;
  --pc-violet: #7445e7;
  --pc-violet-light: #d9cbff;
  --pc-dark: #17181b;
  --pc-green: #237a4c;
  --pc-orange: #f05a24;
}

html { scroll-behavior: smooth; }
body.picoding-case { min-width: 0; color: var(--pc-ink); background: var(--pc-paper); font-family: Inter, "PingFang SC", "Noto Sans CJK SC", "Helvetica Neue", Arial, sans-serif; }
.picoding-case main { padding-top: 72px; }
.picoding-case button { font: inherit; }
.pc-shell { width: min(1320px, calc(100% - 80px)); margin: 0 auto; }

.pc-hero { position: relative; overflow: hidden; color: #fff; background: var(--pc-dark); border-bottom: 1px solid #3b3c41; }
.pc-hero::before { content: ""; position: absolute; inset: 0; opacity: .14; pointer-events: none; background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px); background-size: 72px 72px; mask-image: linear-gradient(90deg, #000, transparent 78%); }
.pc-hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(440px, .82fr) minmax(620px, 1.18fr); gap: 64px; align-items: center; min-height: 760px; padding: 78px 0 72px; }
.pc-eyebrow { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 46px; }
.pc-eyebrow span { padding: 6px 9px; border: 1px solid #4b4d52; color: #b9bbc1; font-size: 9px; font-weight: 700; letter-spacing: .14em; }
.pc-kicker { margin: 0 0 18px; color: var(--pc-violet-light); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.pc-hero h1 { margin: 0; font-size: clamp(58px, 5.1vw, 82px); font-weight: 730; line-height: .98; letter-spacing: -.075em; }
.pc-hero h1 em { color: var(--pc-violet-light); font-family: Georgia, "Times New Roman", serif; font-style: normal; font-weight: 400; letter-spacing: -.055em; }
.pc-lead { max-width: 620px; margin: 32px 0 0; color: #c0c2c7; font-size: 16px; line-height: 1.85; }
.pc-hero-actions { display: flex; gap: 10px; margin-top: 34px; }
.pc-hero-actions a { display: inline-flex; align-items: center; min-height: 44px; padding: 0 18px; border: 1px solid #64666b; color: #fff !important; font-size: 12px; font-weight: 680; }
.pc-hero-actions a:first-child { color: #17181b !important; border-color: var(--pc-violet-light); background: var(--pc-violet-light); }
.pc-hero-actions a:hover { transform: translate(-2px, -2px); }
.pc-hero-visual { position: relative; min-height: 600px; }
.pc-hero-window { position: absolute; top: 66px; right: -94px; width: 760px; overflow: hidden; border: 1px solid #60636b; background: #fff; box-shadow: 0 34px 90px rgba(0,0,0,.46); transform: rotate(-1.4deg); }
.pc-window-bar { height: 34px; display: flex; align-items: center; gap: 6px; padding: 0 12px; color: #777b83; background: #f4f5f7; border-bottom: 1px solid #d7d9de; }
.pc-window-bar span { width: 7px; height: 7px; border-radius: 50%; background: #c0c3c8; }
.pc-window-bar b { margin-left: 8px; font-size: 9px; font-weight: 600; letter-spacing: .04em; }
.pc-hero-window img { display: block; width: 100%; height: auto; }
.pc-hero-chip { position: absolute; z-index: 2; width: 146px; padding: 13px 14px 14px; color: #191a1d; background: var(--pc-violet-light); border: 1px solid #fff; box-shadow: 0 14px 32px rgba(0,0,0,.26); }
.pc-hero-chip small, .pc-hero-chip strong, .pc-hero-chip span { display: block; }
.pc-hero-chip small { color: #5e42a8; font: 10px Georgia, serif; }
.pc-hero-chip strong { margin-top: 20px; font-size: 14px; letter-spacing: .06em; }
.pc-hero-chip span { margin-top: 4px; color: #5b5669; font-size: 10px; }
.pc-chip-a { left: -20px; bottom: 50px; }
.pc-chip-b { left: 140px; bottom: 10px; background: #fff; }
.pc-chip-c { left: 300px; bottom: 50px; color: #fff; background: var(--pc-violet); border-color: #a887ff; }
.pc-chip-c small, .pc-chip-c span { color: #e5dcff; }

.pc-facts { border-bottom: 1px solid var(--pc-line); background: var(--pc-paper-2); }
.pc-fact-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.pc-fact-grid > div { min-height: 150px; padding: 30px 26px; border-right: 1px solid var(--pc-line); }
.pc-fact-grid > div:first-child { border-left: 1px solid var(--pc-line); }
.pc-fact-grid span { display: block; color: var(--pc-muted); font-size: 9px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
.pc-fact-grid strong { display: block; margin-top: 22px; font-size: 22px; letter-spacing: -.03em; }
.pc-fact-grid p { margin: 9px 0 0; color: var(--pc-muted); font-size: 12px; line-height: 1.65; }

.pc-jump { position: sticky; top: 72px; z-index: 100; border-bottom: 1px solid var(--pc-line); background: rgba(245,242,235,.96); backdrop-filter: blur(12px); }
.pc-jump .pc-shell { display: flex; overflow-x: auto; scrollbar-width: none; }
.pc-jump a { flex: 0 0 auto; padding: 17px 19px 15px; border-left: 1px solid var(--pc-line); color: var(--pc-muted) !important; font-size: 11px; font-weight: 650; }
.pc-jump a:last-child { border-right: 1px solid var(--pc-line); }
.pc-jump a:hover, .pc-jump a.is-active { color: var(--pc-ink) !important; background: var(--pc-violet-light); }

.pc-section { padding: 112px 0; border-bottom: 1px solid var(--pc-line); scroll-margin-top: 126px; }
.pc-section-head { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 34px; align-items: start; margin-bottom: 68px; }
.pc-section-head p { margin: 8px 0 0; color: var(--pc-violet); font-size: 10px; font-weight: 760; letter-spacing: .14em; }
.pc-section-head h2 { max-width: 970px; margin: 0; font-size: clamp(38px, 4.4vw, 66px); line-height: 1.04; letter-spacing: -.06em; }
.pc-section-head-light p { color: var(--pc-violet-light); }
.pc-context-grid { display: grid; grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr); gap: 84px; }
.pc-context-copy > p { max-width: 650px; margin: 0 0 20px; color: #4e4d49; font-size: 16px; line-height: 1.9; }
.pc-context-copy .pc-dropcap::first-letter { float: left; margin: 3px 9px 0 0; color: var(--pc-violet); font: 58px/.8 Georgia, serif; }
.pc-role-note { margin-top: 38px; padding: 24px; border: 1px solid var(--pc-line); background: #fff; }
.pc-role-note strong { font-size: 14px; }
.pc-role-note p { margin: 12px 0 0; color: var(--pc-muted); font-size: 13px; line-height: 1.8; }
.pc-problem-list { border-top: 1px solid var(--pc-line); }
.pc-problem-list article { display: grid; grid-template-columns: 70px 1fr; gap: 20px; padding: 30px 0; border-bottom: 1px solid var(--pc-line); }
.pc-problem-list article > span { color: var(--pc-violet); font: 28px Georgia, serif; }
.pc-problem-list h3 { margin: 0; font-size: 22px; letter-spacing: -.03em; }
.pc-problem-list p { margin: 10px 0 0; color: var(--pc-muted); font-size: 13px; line-height: 1.75; }

.pc-model-section, .pc-builder-section, .pc-evidence-section { color: #fff; background: var(--pc-dark); }
.pc-model-map { padding: 36px; border: 1px solid #4c4e53; background: #202126; }
.pc-model-layer { display: grid; grid-template-columns: 180px 1fr; align-items: center; padding: 20px 24px; border: 1px solid #4b4d52; }
.pc-model-layer + .pc-model-layer { margin-top: 10px; }
.pc-model-layer > span { color: #9ea0a5; font-size: 9px; font-weight: 740; letter-spacing: .14em; }
.pc-model-layer > div { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px; }
.pc-model-layer b { padding: 14px; color: #d6d7da; background: #292b30; font-size: 12px; font-weight: 600; text-align: center; }
.pc-model-users { border-color: #5e536f; }
.pc-model-runtime { margin-top: 10px; }
.pc-model-core { margin: 16px 0; padding: 34px; color: #191a1d; background: var(--pc-violet-light); text-align: center; }
.pc-model-core small, .pc-model-core strong { display: block; }
.pc-model-core small { color: #7057a8; font-size: 9px; font-weight: 700; letter-spacing: .16em; }
.pc-model-core strong { margin-top: 14px; font-size: 30px; letter-spacing: -.04em; }
.pc-model-core ul { display: flex; justify-content: center; gap: 8px; margin: 24px 0 0; padding: 0; list-style: none; }
.pc-model-core li { min-width: 125px; padding: 11px 14px; border: 1px solid #9d84d8; font-size: 11px; }
.pc-model-data > div { grid-template-columns: repeat(5, 1fr); }
.pc-model-loop { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 16px; margin-top: 26px; color: #c7c8cc; font-size: 10px; font-weight: 750; letter-spacing: .12em; }
.pc-model-loop i { color: var(--pc-violet-light); font-style: normal; }
.pc-benchmark-note { display: grid; grid-template-columns: 180px 1fr auto; gap: 30px; align-items: center; margin-top: 28px; padding: 24px; border: 1px solid #4b4d52; }
.pc-benchmark-note span { color: var(--pc-violet-light); font-size: 9px; font-weight: 750; letter-spacing: .14em; }
.pc-benchmark-note p { margin: 0; color: #bcbec3; font-size: 12px; line-height: 1.75; }
.pc-benchmark-note a { color: #fff !important; font-size: 11px; text-decoration: underline; text-underline-offset: 4px; }

.pc-source-legend { display: flex; align-items: center; gap: 9px; margin: -30px 0 34px 230px; }
.pc-source-legend span, .pc-evidence-grid figcaption > span, .pc-tour-media span { display: inline-flex; padding: 6px 8px; font-size: 8px; font-weight: 760; letter-spacing: .08em; text-transform: uppercase; }
.is-real { color: #154e35 !important; background: #d8eee2 !important; }
.is-recreated { color: #15556a !important; background: #d9eef5 !important; }
.is-concept { color: #5637a2 !important; background: #e7ddff !important; }
.pc-source-legend p { margin: 0 0 0 8px; color: var(--pc-muted); font-size: 11px; }
.pc-tour { border: 1px solid var(--pc-line); background: #fff; }
.pc-tour-steps { display: grid; grid-template-columns: repeat(8, 1fr); border-bottom: 1px solid var(--pc-line); }
.pc-tour-steps button { min-width: 0; min-height: 122px; padding: 17px 14px; color: var(--pc-muted); border: 0; border-right: 1px solid var(--pc-line); background: var(--pc-paper-2); text-align: left; cursor: pointer; }
.pc-tour-steps button:last-child { border-right: 0; }
.pc-tour-steps button span, .pc-tour-steps button b, .pc-tour-steps button small { display: block; }
.pc-tour-steps button span { color: var(--pc-violet); font: 18px Georgia, serif; }
.pc-tour-steps button b { margin-top: 18px; color: var(--pc-ink); font-size: 11px; line-height: 1.35; }
.pc-tour-steps button small { margin-top: 5px; font-size: 9px; }
.pc-tour-steps button[aria-selected="true"] { color: #fff; background: var(--pc-violet); }
.pc-tour-steps button[aria-selected="true"] span, .pc-tour-steps button[aria-selected="true"] b { color: #fff; }
.pc-tour-steps button[aria-selected="true"] small { color: #ded2ff; }
.pc-tour-panel { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(350px, .55fr); min-height: 610px; }
.pc-tour-media { display: flex; align-items: center; padding: 30px; background: #e5e7eb; overflow: hidden; }
.pc-tour-media > button { position: relative; width: 100%; max-height: 560px; padding: 0; overflow: hidden; border: 1px solid #c5c7cd; background: #fff; box-shadow: 0 22px 50px rgba(22,23,27,.18); cursor: zoom-in; }
.pc-tour-media img { display: block; width: 100%; max-height: 558px; object-fit: contain; background: #fff; transition: opacity .16s ease; }
.pc-tour-media span { position: absolute; top: 12px; left: 12px; }
.pc-tour-copy { display: flex; flex-direction: column; padding: 38px 34px 30px; border-left: 1px solid var(--pc-line); }
.pc-tour-copy > p:first-child { margin: 0; color: var(--pc-violet); font-size: 9px; font-weight: 760; letter-spacing: .14em; }
.pc-tour-copy h3 { margin: 26px 0 0; font-size: 32px; line-height: 1.1; letter-spacing: -.045em; }
.pc-tour-copy > p:nth-of-type(2) { margin: 20px 0 0; color: var(--pc-muted); font-size: 13px; line-height: 1.8; }
.pc-tour-copy ul { margin: 26px 0 0; padding: 0; list-style: none; border-top: 1px solid var(--pc-line); }
.pc-tour-copy li { position: relative; padding: 13px 0 13px 21px; border-bottom: 1px solid var(--pc-line); color: #4e4d49; font-size: 11px; line-height: 1.55; }
.pc-tour-copy li::before { content: ""; position: absolute; top: 18px; left: 0; width: 6px; height: 6px; background: var(--pc-violet); }
.pc-tour-state { margin-top: auto; padding: 16px; border-left: 3px solid var(--pc-green); background: #eef6f1; }
.pc-tour-state span, .pc-tour-state strong { display: block; }
.pc-tour-state span { color: var(--pc-green); font-size: 8px; font-weight: 750; letter-spacing: .1em; }
.pc-tour-state strong { margin-top: 7px; font-size: 11px; }
.pc-tour-actions { display: grid; grid-template-columns: .75fr 1.25fr; gap: 8px; margin-top: 18px; }
.pc-tour-actions button { min-height: 42px; padding: 0 11px; border: 1px solid var(--pc-line); background: transparent; cursor: pointer; font-size: 10px; font-weight: 650; }
.pc-tour-actions button:last-child { color: #fff; border-color: var(--pc-violet); background: var(--pc-violet); }
.pc-tour-actions button:disabled { opacity: .35; cursor: not-allowed; }

.pc-builder-frame { position: relative; padding: 44px 44px 170px; border: 1px solid #4b4d52; background: #202126; }
.pc-builder-frame > button { display: block; width: 100%; padding: 0; overflow: hidden; border: 1px solid #666970; background: #fff; box-shadow: 0 30px 72px rgba(0,0,0,.32); cursor: zoom-in; }
.pc-builder-frame img { display: block; width: 100%; }
.pc-builder-callout { position: absolute; bottom: 34px; width: calc(33.333% - 40px); min-height: 104px; padding: 18px; color: #fff; border: 1px solid #575a61; background: #292a2f; }
.pc-builder-callout span { color: var(--pc-violet-light); font: 17px Georgia, serif; }
.pc-builder-callout strong { display: block; margin-top: 10px; font-size: 12px; }
.pc-builder-callout p { margin: 7px 0 0; color: #abadb2; font-size: 10px; line-height: 1.55; }
.callout-a { left: 44px; }
.callout-b { left: 33.333%; }
.callout-c { right: 44px; }
.pc-property-grid { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 28px; border-top: 1px solid #4b4d52; border-left: 1px solid #4b4d52; }
.pc-property-grid article { min-height: 230px; padding: 28px; border-right: 1px solid #4b4d52; border-bottom: 1px solid #4b4d52; }
.pc-property-grid span { color: var(--pc-violet-light); font-size: 9px; font-weight: 740; letter-spacing: .14em; }
.pc-property-grid h3 { margin: 34px 0 0; font-size: 20px; }
.pc-property-grid p { margin: 13px 0 0; color: #abadb2; font-size: 12px; line-height: 1.75; }

.pc-decision-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--pc-line); border-left: 1px solid var(--pc-line); }
.pc-decision-grid article { min-height: 330px; padding: 27px; border-right: 1px solid var(--pc-line); border-bottom: 1px solid var(--pc-line); }
.pc-decision-grid span { color: var(--pc-violet); font: 28px Georgia, serif; }
.pc-decision-grid h3 { margin: 50px 0 0; font-size: 23px; line-height: 1.2; letter-spacing: -.035em; }
.pc-decision-grid p { margin: 16px 0 0; color: var(--pc-muted); font-size: 12px; line-height: 1.75; }
.pc-decision-grid em { display: inline-block; margin-top: 26px; padding-top: 9px; border-top: 2px solid var(--pc-violet); color: var(--pc-violet); font-size: 9px; font-style: normal; font-weight: 750; letter-spacing: .08em; }
.pc-boundary-grid { display: grid; grid-template-columns: .72fr 1.28fr; margin-top: 54px; padding: 38px; color: #fff; background: var(--pc-dark); }
.pc-boundary-grid > div p { margin: 0; color: var(--pc-violet-light); font-size: 9px; font-weight: 750; letter-spacing: .14em; }
.pc-boundary-grid h3 { max-width: 420px; margin: 24px 0 0; font-size: 34px; line-height: 1.1; letter-spacing: -.045em; }
.pc-boundary-grid ul { margin: 0; padding: 0; list-style: none; border-top: 1px solid #4b4d52; }
.pc-boundary-grid li { display: grid; grid-template-columns: 130px 1fr; gap: 22px; padding: 18px 0; border-bottom: 1px solid #4b4d52; }
.pc-boundary-grid b { font-size: 12px; }
.pc-boundary-grid span { color: #abadb2; font-size: 11px; line-height: 1.6; }

.pc-evidence-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.pc-evidence-grid figure { margin: 0; border: 1px solid #4b4d52; background: #202126; }
.pc-evidence-grid figure:first-child { grid-column: span 2; }
.pc-evidence-grid button { display: block; width: 100%; padding: 0; overflow: hidden; border: 0; border-bottom: 1px solid #4b4d52; background: #eff0f2; cursor: zoom-in; }
.pc-evidence-grid img { display: block; width: 100%; aspect-ratio: 16 / 10; object-fit: contain; background: #eff0f2; }
.pc-evidence-grid figure:first-child img { aspect-ratio: auto; }
.pc-evidence-grid figcaption { padding: 22px; }
.pc-evidence-grid figcaption strong { display: block; margin-top: 18px; font-size: 17px; }
.pc-evidence-grid figcaption p { margin: 10px 0 0; color: #abadb2; font-size: 11px; line-height: 1.65; }
.pc-proof-footer { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; margin-top: 28px; padding: 26px; border: 1px solid #4b4d52; }
.pc-proof-footer span, .pc-proof-footer strong { display: block; }
.pc-proof-footer span { color: var(--pc-violet-light); font-size: 9px; font-weight: 740; letter-spacing: .12em; }
.pc-proof-footer strong { margin-top: 9px; color: #d4d5d8; font-size: 12px; line-height: 1.7; }
.pc-proof-footer a { color: #fff !important; font-size: 11px; text-decoration: underline; text-underline-offset: 4px; }

.pc-result-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--pc-line); border-left: 1px solid var(--pc-line); }
.pc-result-grid article { min-height: 280px; padding: 28px; border-right: 1px solid var(--pc-line); border-bottom: 1px solid var(--pc-line); }
.pc-result-grid span { color: var(--pc-violet); font-size: 9px; font-weight: 750; letter-spacing: .12em; }
.pc-result-grid h3 { margin: 42px 0 0; font-size: 23px; line-height: 1.2; letter-spacing: -.035em; }
.pc-result-grid p { margin: 15px 0 0; color: var(--pc-muted); font-size: 12px; line-height: 1.75; }
.pc-reflection { display: grid; grid-template-columns: .8fr 1.2fr; gap: 70px; margin-top: 50px; padding: 42px; color: #fff; background: var(--pc-violet); }
.pc-reflection div p { margin: 0; color: #ded3ff; font-size: 9px; font-weight: 750; letter-spacing: .13em; }
.pc-reflection h3 { margin: 22px 0 0; font-size: 34px; line-height: 1.08; letter-spacing: -.045em; }
.pc-reflection > p { margin: 0; color: #eee8ff; font-size: 13px; line-height: 1.85; }

.pc-next { padding: 82px 0; color: #fff; background: #111215; }
.pc-next-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: end; }
.pc-next p { margin: 0; color: var(--pc-violet-light); font-size: 9px; font-weight: 740; letter-spacing: .14em; }
.pc-next h2 { margin: 24px 0 0; font-size: 40px; line-height: 1.1; letter-spacing: -.05em; }
.pc-next a { display: block; padding: 26px; border: 1px solid #4b4d52; color: #fff !important; }
.pc-next a:hover { border-color: var(--pc-violet-light); transform: translate(-3px, -3px); }
.pc-next a span, .pc-next a strong { display: block; }
.pc-next a span { color: #999ba1; font-size: 9px; letter-spacing: .1em; }
.pc-next a strong { margin-top: 24px; font-size: 20px; }
.pc-footer { padding: 24px 0; color: #c7c8cc; background: #111215; border-top: 1px solid #36383d; }
.pc-footer .pc-shell { display: flex; justify-content: space-between; font-size: 10px; }
.pc-footer a { color: #fff !important; }

.pc-media-dialog { width: min(1500px, calc(100vw - 48px)); max-width: none; max-height: calc(100vh - 48px); padding: 48px 20px 20px; border: 1px solid #5a5c62; color: #fff; background: #17181b; }
.pc-media-dialog::backdrop { background: rgba(10,10,12,.82); backdrop-filter: blur(7px); }
.pc-media-dialog > button { position: absolute; top: 12px; right: 15px; }
.pc-media-dialog > .pc-media-dialog-image { display: block; max-width: 100%; max-height: calc(100vh - 150px); margin: 0 auto; object-fit: contain; background: #fff; }
.pc-media-dialog p { margin: 14px auto 0; max-width: 980px; color: #c3c5ca; font-size: 11px; line-height: 1.65; text-align: center; }

@media (max-width: 1100px) {
  .pc-shell { width: min(100% - 48px, 1320px); }
  .pc-hero-grid { grid-template-columns: 1fr; padding-top: 70px; }
  .pc-hero-copy { max-width: 760px; }
  .pc-hero-visual { min-height: 560px; }
  .pc-hero-window { right: -40px; width: min(860px, 90vw); }
  .pc-tour-steps { grid-template-columns: repeat(4, 1fr); }
  .pc-tour-steps button:nth-child(4) { border-right: 0; }
  .pc-tour-steps button:nth-child(-n+4) { border-bottom: 1px solid var(--pc-line); }
  .pc-tour-panel { grid-template-columns: 1fr; }
  .pc-tour-copy { border-top: 1px solid var(--pc-line); border-left: 0; }
  .pc-tour-state { margin-top: 28px; }
  .pc-property-grid, .pc-decision-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .picoding-case main { padding-top: 64px; }
  .pc-shell { width: calc(100% - 32px); }
  .pc-hero-grid { min-height: auto; padding: 54px 0 44px; gap: 38px; }
  .pc-eyebrow { margin-bottom: 28px; }
  .pc-hero h1 { font-size: clamp(44px, 13vw, 62px); }
  .pc-lead { font-size: 14px; }
  .pc-hero-actions { flex-direction: column; align-items: stretch; }
  .pc-hero-actions a { justify-content: center; }
  .pc-hero-visual { min-height: 330px; }
  .pc-hero-window { top: 16px; right: -76px; width: 620px; transform: rotate(-1deg); }
  .pc-hero-chip { width: 105px; padding: 10px; }
  .pc-hero-chip strong { margin-top: 8px; font-size: 11px; }
  .pc-chip-a { left: 0; bottom: 12px; }
  .pc-chip-b { left: 112px; bottom: -4px; }
  .pc-chip-c { left: 224px; bottom: 12px; }
  .pc-fact-grid { grid-template-columns: repeat(2, 1fr); }
  .pc-fact-grid > div { min-height: 130px; padding: 22px 16px; border-bottom: 1px solid var(--pc-line); }
  .pc-fact-grid strong { margin-top: 16px; font-size: 17px; }
  .pc-jump { top: 64px; }
  .pc-section { padding: 76px 0; scroll-margin-top: 116px; }
  .pc-section-head { grid-template-columns: 1fr; gap: 18px; margin-bottom: 42px; }
  .pc-section-head h2 { font-size: 42px; }
  .pc-context-grid, .pc-boundary-grid, .pc-reflection, .pc-next-grid { grid-template-columns: 1fr; gap: 38px; }
  .pc-model-map { padding: 16px; }
  .pc-model-layer { grid-template-columns: 1fr; gap: 15px; padding: 15px; }
  .pc-model-layer > div, .pc-model-data > div { grid-template-columns: repeat(2, 1fr); }
  .pc-model-core { padding: 25px 15px; }
  .pc-model-core ul { display: grid; grid-template-columns: repeat(2, 1fr); }
  .pc-model-core li { min-width: 0; }
  .pc-benchmark-note { grid-template-columns: 1fr; gap: 14px; }
  .pc-source-legend { flex-wrap: wrap; margin: -10px 0 24px; }
  .pc-source-legend p { width: 100%; margin: 2px 0 0; line-height: 1.6; }
  .pc-tour-steps { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; }
  .pc-tour-steps button { flex: 0 0 150px; min-height: 108px; border-bottom: 0 !important; scroll-snap-align: start; }
  .pc-tour-media { padding: 14px; min-height: 300px; }
  .pc-tour-media > button { max-height: 360px; }
  .pc-tour-media img { max-height: 358px; }
  .pc-tour-copy { padding: 28px 20px 22px; }
  .pc-tour-copy h3 { font-size: 28px; }
  .pc-tour-actions { grid-template-columns: 1fr; }
  .pc-builder-frame { padding: 14px 14px 18px; }
  .pc-builder-frame > button { overflow-x: auto; }
  .pc-builder-frame img { width: 780px; max-width: none; }
  .pc-builder-callout { position: static; width: auto; min-height: 0; margin-top: 10px; }
  .pc-property-grid, .pc-decision-grid, .pc-result-grid, .pc-evidence-grid { grid-template-columns: 1fr; }
  .pc-evidence-grid figure:first-child { grid-column: auto; }
  .pc-evidence-grid figure:first-child img { aspect-ratio: 16 / 10; }
  .pc-proof-footer { grid-template-columns: 1fr; }
  .pc-boundary-grid { padding: 26px 20px; }
  .pc-boundary-grid li { grid-template-columns: 1fr; gap: 8px; }
  .pc-reflection { padding: 28px 22px; }
  .pc-next { padding: 62px 0; }
  .pc-next h2 { font-size: 34px; }
  .pc-footer .pc-shell { gap: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}