:root {
  --ink: #24364b;
  --navy: #1e476d;
  --muted: #465b6c;
  --subtle: #5e7180;
  --paper: #f7f4ee;
  --surface: #fffdfa;
  --mist: #edf2f4;
  --blue-soft: #e0ebf2;
  --blue-pale: #f0f5f7;
  --line: #ced8dd;
  --line-strong: #aebfc8;
  --accent: #b96843;
  --accent-soft: #f1dfd3;
  --green: #4d7862;
  --green-soft: #e3eee7;
  --serif: "Songti SC", STSong, SimSun, "Noto Serif CJK SC", Georgia, serif;
  --sans: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body { margin: 0; min-width: 320px; color: var(--ink); background: var(--paper); font: 17px/1.7 var(--serif); }
a { color: inherit; }
a, button { cursor: pointer; }
button { color: inherit; font: inherit; }
a:focus-visible, button:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 100; top: 10px; left: 10px; padding: 9px 14px; color: white; background: var(--navy); transform: translateY(-160%); }
.skip-link:focus { transform: none; }

.site-header { position: sticky; z-index: 30; top: 0; display: grid; grid-template-columns: 1fr auto 1fr; min-height: 76px; align-items: center; padding: 0 max(24px, calc((100vw - 1220px) / 2)); border-bottom: 1px solid rgba(30,71,109,.14); background: rgba(247,244,238,.93); backdrop-filter: blur(18px); }
.brand { display: flex; width: fit-content; align-items: center; gap: 11px; text-decoration: none; }
.brand img { width: 38px; height: 38px; object-fit: contain; }
.brand strong { font: 800 23px/1 var(--sans); letter-spacing: -.025em; }
.site-header nav { display: flex; gap: 34px; }
.site-header nav a { color: var(--muted); font-size: 15px; text-decoration: none; transition: color 160ms ease; }
.site-header nav a:hover { color: var(--navy); }
.github-link { justify-self: end; padding: 8px 13px; border: 1px solid var(--line); border-radius: 8px; background: var(--surface); font-size: 15px; font-weight: 700; text-decoration: none; transition: border-color 160ms ease, background 160ms ease; }
.github-link:hover { border-color: var(--line-strong); background: var(--blue-pale); }

main { overflow: hidden; }
.hero { display: grid; max-width: 1220px; grid-template-columns: minmax(0,.92fr) minmax(460px,1.08fr); align-items: center; gap: 92px; min-height: 690px; margin: auto; padding: 88px 24px 72px; }
.eyebrow { margin: 0 0 18px; color: var(--accent); font: 800 12px/1.4 var(--sans); letter-spacing: .13em; }
.hero h1 { max-width: 650px; margin: 0 0 24px; font-size: clamp(54px,6vw,80px); font-weight: 700; line-height: 1.02; letter-spacing: -.045em; }
.hero h1 em { color: var(--accent); font-style: normal; font-weight: 500; }
.hero-lead { max-width: 640px; margin: 0 0 30px; color: var(--muted); font: 19px/1.65 var(--sans); }
.hero-actions { display: flex; gap: 12px; }
.button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; padding: 10px 19px; border: 1px solid transparent; border-radius: 8px; font-size: 16px; font-weight: 700; text-decoration: none; transition: color 160ms ease, background 160ms ease, border-color 160ms ease, transform 160ms ease; }
.button:hover { transform: translateY(-1px); }
.button.primary { color: white; background: var(--navy); }
.button.primary:hover { background: #28577f; }
.button.secondary { border-color: var(--line-strong); background: var(--surface); }
.button.secondary:hover { background: var(--blue-pale); }
.hero-note { margin: 20px 0 0; color: var(--muted); font: 16px/1.55 var(--sans); }

.decision-card { overflow: hidden; border: 1px solid var(--line-strong); border-radius: 18px; background: var(--surface); box-shadow: 0 26px 70px rgba(40,70,90,.12); }
.decision-card > header { display: grid; gap: 8px; padding: 28px 30px; border-bottom: 1px solid var(--line); background: var(--blue-pale); }
.decision-card > header span { color: var(--accent); font: 800 13px/1.3 var(--sans); letter-spacing: .08em; }
.decision-card > header h2 { margin: 0; font-size: 27px; line-height: 1.2; letter-spacing: -.025em; }
.decision-card > header p { margin: 0; color: var(--muted); font: 16px/1.45 var(--sans); }
.decision-flow { margin: 0; padding: 8px 30px; list-style: none; }
.decision-flow li { display: grid; grid-template-columns: 42px minmax(0,1fr); align-items: start; gap: 16px; padding: 19px 0; }
.decision-flow li + li { border-top: 1px solid var(--line); }
.flow-index { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 10px; color: var(--navy); background: var(--blue-soft); font: 800 14px/1 var(--sans); }
.decision-flow li:nth-child(2) .flow-index { color: #84452b; background: var(--accent-soft); }
.decision-flow h3 { margin: 0 0 3px; font-size: 20px; line-height: 1.25; }
.decision-flow p { margin: 0; color: var(--muted); font: 15px/1.45 var(--sans); }
.decision-card > footer { padding: 16px 30px; border-top: 1px solid var(--line); color: var(--green); background: var(--green-soft); font: 700 15px/1.4 var(--sans); }

.proof-strip { display: grid; max-width: 1172px; grid-template-columns: repeat(4,1fr); margin: 0 auto; overflow: hidden; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.proof-strip div { display: grid; min-height: 122px; place-content: center; gap: 7px; padding: 22px; border-right: 1px solid var(--line); text-align: center; }
.proof-strip div:last-child { border-right: 0; background: var(--blue-pale); }
.proof-strip strong { color: var(--navy); font-size: 38px; line-height: 1; letter-spacing: -.035em; }
.proof-strip span { color: var(--muted); font: 15px/1.4 var(--sans); }

.section { max-width: 1220px; margin: 0 auto; padding: 126px 24px 0; scroll-margin-top: 92px; }
.section-head { max-width: 820px; margin-bottom: 48px; }
.section-head h2, .closing h2 { margin: 0 0 18px; font-size: clamp(38px,4.4vw,56px); font-weight: 700; line-height: 1.12; letter-spacing: -.035em; text-wrap: balance; }
.section-head > p:last-child, .split-head > p { margin: 0; color: var(--muted); font: 18px/1.65 var(--sans); }
.split-head { display: grid; max-width: none; grid-template-columns: minmax(0,1fr) minmax(330px,.65fr); align-items: end; gap: 78px; }
.split-head h2 { margin-bottom: 0; }

.loop-shell { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.loop-tabs { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: var(--line); }
.loop-tabs button { position: relative; display: grid; min-height: 136px; align-content: center; gap: 7px; padding: 22px; border: 0; background: var(--blue-pale); text-align: left; transition: color 170ms ease, background 170ms ease; }
.loop-tabs button:hover { background: var(--blue-soft); }
.loop-tabs button[aria-selected="true"] { color: white; background: var(--navy); }
.loop-tabs button[aria-selected="true"]::after { position: absolute; right: 22px; bottom: -9px; width: 18px; height: 18px; background: var(--navy); content: ""; transform: rotate(45deg); }
.loop-tabs button span { color: var(--accent); font: 800 13px/1 var(--sans); }
.loop-tabs button[aria-selected="true"] span { color: #f1b493; }
.loop-tabs button strong { font-size: 22px; }
.loop-tabs button small { color: var(--muted); font: 15px/1.35 var(--sans); }
.loop-tabs button[aria-selected="true"] small { color: rgba(255,255,255,.78); }
.loop-detail { display: grid; grid-template-columns: minmax(0,.8fr) minmax(440px,1.2fr); gap: 50px; min-height: 270px; padding: 42px; outline: none; }
.loop-detail > div > span { color: var(--accent); font: 800 13px/1.3 var(--sans); letter-spacing: .08em; }
.loop-detail h3 { margin: 11px 0 12px; font-size: 29px; }
.loop-detail p { margin: 0; color: var(--muted); font: 17px/1.65 var(--sans); }
.loop-detail dl { display: grid; gap: 13px; margin: 0; }
.loop-detail dl div { padding: 18px 20px; border-left: 3px solid var(--accent); border-radius: 0 9px 9px 0; background: var(--blue-pale); }
.loop-detail dt { color: var(--navy); font: 800 13px/1.3 var(--sans); letter-spacing: .06em; text-transform: uppercase; }
.loop-detail dd { margin: 6px 0 0; color: var(--muted); font: 15px/1.55 var(--sans); }

.contribution-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 18px; margin-top: 20px; }
.contribution-grid article { display: grid; grid-template-columns: auto 1fr; gap: 24px; min-height: 220px; padding: 32px; border: 1px solid var(--line); border-radius: 14px; background: var(--surface); }
.contribution-grid article:last-child { background: var(--green-soft); }
.contribution-number { display: grid; width: 48px; height: 48px; place-items: center; border-radius: 50%; color: white; background: var(--navy); font: 800 13px/1 var(--sans); }
.contribution-grid h3 { margin: 2px 0 12px; font-size: 25px; }
.contribution-grid p { margin: 0; color: var(--muted); font: 16px/1.7 var(--sans); }

.case-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 20px; }
.case-card { overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease; }
.case-card:hover { border-color: var(--line-strong); box-shadow: 0 18px 46px rgba(40,70,90,.09); transform: translateY(-2px); }
.case-preview { position: relative; min-height: 302px; padding: 42px 34px 0; overflow: hidden; background: var(--blue-pale); }
.case-app-badge { position: absolute; z-index: 3; top: 12px; left: 20px; display: flex; min-height: 42px; align-items: center; gap: 9px; padding: 6px 12px 6px 8px; border: 1px solid rgba(174,191,200,.75); border-radius: 9px; background: rgba(255,253,250,.94); box-shadow: 0 5px 15px rgba(40,70,90,.08); backdrop-filter: blur(9px); }
.case-app-badge img { width: 28px; height: 28px; }
.case-app-badge b { color: var(--navy); font: 800 13px/1 var(--sans); }
.case-video, .case-window { position: relative; height: 260px; overflow: hidden; border: 1px solid var(--line-strong); border-radius: 11px 11px 0 0; background: white; box-shadow: 0 18px 36px rgba(40,70,90,.12); }
.case-video video { display: block; width: 100%; height: 100%; object-fit: cover; background: white; }
.video-switch { position: absolute; z-index: 2; top: 11px; right: 11px; display: flex; gap: 5px; padding: 5px; border: 1px solid rgba(174,191,200,.75); border-radius: 9px; background: rgba(255,253,250,.92); backdrop-filter: blur(9px); }
.video-switch button { min-height: 44px; padding: 7px 12px; border: 0; border-radius: 6px; background: transparent; color: var(--muted); font-size: 13px; font-weight: 700; transition: color 160ms ease, background 160ms ease; }
.video-switch button:hover { color: var(--navy); background: var(--blue-pale); }
.video-switch button[aria-pressed="true"] { color: white; background: var(--navy); }
.window-bar { display: flex; height: 40px; align-items: center; gap: 5px; padding: 0 12px; border-bottom: 1px solid var(--line); background: var(--blue-pale); }
.window-bar span { width: 7px; height: 7px; border-radius: 50%; background: #b9c6cc; }
.window-bar b { margin-left: 6px; color: var(--muted); font: 700 12px/1 var(--sans); }
.window-content { display: grid; height: calc(100% - 40px); grid-template-columns: 25% 1fr; }
.window-sidebar { border-right: 1px solid var(--line); background: var(--mist); }
.window-canvas { display: grid; grid-template-columns: repeat(2,1fr); gap: 10px; align-content: center; padding: 24px; }
.window-canvas i { display: block; height: 44px; border-radius: 5px; background: var(--mist); }
.route-overlay { position: absolute; right: 12px; bottom: 12px; left: 12px; display: flex; align-items: center; gap: 6px; padding: 9px; border: 1px solid var(--line); border-radius: 7px; background: rgba(255,253,250,.95); box-shadow: 0 5px 15px rgba(40,70,90,.08); }
.route-overlay span { padding: 4px 6px; border-radius: 4px; color: var(--navy); background: var(--blue-soft); font: 700 11px/1.2 var(--sans); }
.route-overlay b { margin-left: auto; color: var(--accent); font: 800 12px/1 var(--sans); }
.case-copy { padding: 27px; }
.case-meta { display: flex; justify-content: space-between; color: var(--accent); font: 800 12px/1.4 var(--sans); letter-spacing: .06em; }
.case-meta b { color: var(--subtle); }
.case-copy h3 { margin: 10px 0 8px; font-size: 27px; letter-spacing: -.018em; }
.case-copy p { min-height: 54px; margin: 0 0 17px; color: var(--muted); font: 16px/1.6 var(--sans); }
.case-copy small { color: var(--subtle); font: 15px/1.5 var(--sans); }

.insight-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-bottom: 22px; }
.insight-row article { min-height: 165px; padding: 26px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.insight-row strong { color: var(--navy); font-size: 20px; }
.insight-row p { margin: 10px 0 0; color: var(--muted); font: 16px/1.55 var(--sans); }

.benchmark-shell { display: grid; grid-template-columns: 210px minmax(0,1fr); overflow: hidden; border: 1px solid var(--line); border-radius: 16px; background: var(--surface); }
.task-tabs { display: flex; flex-direction: column; gap: 5px; padding: 14px; border-right: 1px solid var(--line); background: var(--blue-pale); }
.task-tabs button { display: flex; min-height: 68px; align-items: center; gap: 11px; padding: 12px 14px; border: 0; border-radius: 9px; background: transparent; text-align: left; transition: background 160ms ease, color 160ms ease; }
.task-tabs button:hover { background: rgba(255,255,255,.7); }
.task-tabs button[aria-selected="true"] { color: white; background: var(--navy); }
.task-tabs img { width: 30px; height: 30px; flex: 0 0 auto; border-radius: 7px; }
.task-tabs span { font: 800 15px/1.2 var(--sans); }
.benchmark-board { min-width: 0; padding: 34px; }
.benchmark-title { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
.benchmark-title > div:first-child > span { color: var(--accent); font: 800 12px/1.4 var(--sans); letter-spacing: .08em; text-transform: uppercase; }
.benchmark-title h3 { margin: 6px 0 0; font-size: 29px; }
.benchmark-description { max-width: 760px; margin: 10px 0 26px; color: var(--muted); font: 16px/1.65 var(--sans); }
.comparison-panel { padding: 22px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.comparison-panel + .comparison-panel { margin-top: 18px; }
.agent-comparison { background: var(--blue-pale); }
.comparison-heading { display: flex; align-items: start; justify-content: space-between; gap: 18px; margin-bottom: 20px; }
.comparison-index { color: var(--accent); font: 800 12px/1.4 var(--sans); letter-spacing: .08em; }
.comparison-heading h4 { margin: 5px 0 0; color: var(--navy); font-size: 23px; }
.comparison-heading p { margin: 6px 0 0; color: var(--muted); font: 15px/1.5 var(--sans); }
.speedup { display: grid; justify-items: end; flex: 0 0 auto; }
.speedup strong { color: var(--green); font-size: 36px; line-height: 1; }
.speedup span { margin-top: 7px; color: var(--subtle); font: 700 13px/1.3 var(--sans); }
.comparison-rows { display: grid; gap: 10px; padding-top: 12px; border-top: 1px solid var(--line); }
.comparison-key { display: grid; grid-template-columns: 180px minmax(100px,1fr) 95px; gap: 16px; color: var(--muted); font: 700 13px/1.4 var(--sans); }
.comparison-key.agent-key { grid-template-columns: 180px minmax(100px,1fr) 110px 95px; }
.comparison-key.agent-key span:last-child { grid-column: 3; text-align: right; }
.result-detail { min-width: 0; }
.result-row { display: grid; align-items: center; gap: 16px; min-height: 66px; padding: 12px 14px; border-radius: 9px; background: var(--blue-pale); cursor: pointer; list-style: none; scroll-margin-top: 90px; }
.result-row::-webkit-details-marker { display: none; }
.result-row:hover { box-shadow: inset 0 0 0 1px var(--line-strong); }
.result-row:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.result-row.action-row { grid-template-columns: 180px minmax(100px,1fr) 95px; }
.result-row.agent-row { grid-template-columns: 180px minmax(100px,1fr) 110px 95px; background: var(--surface); }
.result-name b { font-size: 16px; }
.result-track { position: relative; height: 32px; overflow: hidden; border-radius: 6px; background: #dce5e9; }
.result-track i { position: absolute; inset: 0 auto 0 0; width: var(--width); transform-origin: left; animation: bar-in 500ms ease-out both; }
.result-track i.hybrid { background: #91b7a0; }
.result-track i.gui { background: #d9a087; }
.result-track strong { position: relative; z-index: 1; display: flex; height: 100%; align-items: center; padding-left: 10px; color: var(--ink); font: 800 13px/1 var(--sans); }
.result-cost { text-align: right; font: 800 17px/1.2 var(--sans); font-variant-numeric: tabular-nums; color: var(--navy); }
.row-open { justify-self: end; color: var(--navy); font: 700 14px/1.2 var(--sans); white-space: nowrap; }
.row-open::after { display: inline-block; width: 6px; height: 6px; margin: 0 2px 2px 8px; border-right: 2px solid currentColor; border-bottom: 2px solid currentColor; content: ""; transform: rotate(45deg); transition: transform 160ms ease; }
.result-detail[open] .row-open::after { transform: rotate(225deg); }
.step-panel { margin: 6px 0 8px; padding: 16px 18px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); }
.step-panel > p, .step-empty { margin: 0; color: var(--muted); font: 15px/1.5 var(--sans); }
.step-panel-head { display: flex; justify-content: space-between; gap: 12px; padding-bottom: 12px; color: var(--muted); font: 700 14px/1.4 var(--sans); }
.step-panel-head b { color: var(--green); }
.step-list { display: grid; gap: 0; margin: 0; padding: 0; list-style: none; }
.step-list li { display: grid; grid-template-columns: 34px minmax(0,1fr) auto; align-items: start; gap: 12px; padding: 12px 0; border-top: 1px solid var(--line); }
.step-number { color: var(--accent); font: 800 14px/1.4 var(--sans); }
.step-copy b { color: var(--navy); font-size: 16px; }
.step-copy p { margin: 4px 0 0; color: var(--muted); font: 14px/1.4 var(--sans); overflow-wrap: anywhere; }
.step-status { color: var(--muted); font: 700 13px/1.4 var(--sans); white-space: nowrap; }
.step-status.is-verified { color: var(--green); }
.step-status.is-failed { color: var(--accent); }
.empty-results { display: grid; justify-items: center; gap: 5px; padding: 44px 20px; border: 1px dashed var(--line-strong); border-radius: 9px; color: var(--muted); text-align: center; }
.empty-results b { font-size: 17px; }
.empty-results span { color: var(--subtle); font: 15px/1.5 var(--sans); }
.retry-button { min-height: 44px; margin-top: 8px; padding: 8px 16px; border: 1px solid var(--line-strong); border-radius: 7px; color: var(--navy); background: var(--surface); font: 800 14px/1 var(--sans); }
.retry-button:hover { background: var(--blue-pale); }
.cost-note { margin: 14px 0 0; color: var(--muted); font: 14px/1.5 var(--sans); }

.open-task-shell { padding: clamp(22px,4vw,48px); border: 1px solid var(--line); border-radius: 18px; background: var(--blue-pale); }
.open-task-heading { max-width: 880px; }
.open-task-heading h2 { margin: 0 0 20px; font-size: clamp(35px,4vw,54px); line-height: 1.12; letter-spacing: -.035em; }
.open-task-heading h2 em { color: var(--accent); font-style: normal; }
.open-task-heading > p:not(.eyebrow) { margin: 0; color: var(--muted); font: 19px/1.65 var(--sans); }
.open-task-diagram { display: block; width: 100%; height: auto; margin: 34px 0 20px; border-radius: 14px; }
.open-task-mobile-flow { display: none; }
.open-task-status { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.open-task-status p { margin: 0; padding: 17px 20px; border: 1px solid var(--line); border-radius: 10px; color: var(--muted); background: var(--surface); font: 16px/1.5 var(--sans); }
.open-task-status strong { display: block; margin-bottom: 5px; color: var(--navy); font-size: 17px; }
.open-task-case-head { display: grid; grid-template-columns: minmax(0,1fr) auto; align-items: end; gap: 28px; margin: 72px 0 24px; }
.open-task-case-head h3 { margin: 0 0 12px; font-size: clamp(28px,3vw,40px); line-height: 1.2; text-wrap: balance; }
.open-task-case-head p:not(.eyebrow) { max-width: 660px; margin: 0; color: var(--muted); font: 17px/1.6 var(--sans); }
.open-task-facts { display: grid; grid-template-columns: repeat(2,minmax(100px,1fr)); gap: 8px; min-width: 240px; }
.open-task-facts div { display: grid; align-content: center; justify-items: center; gap: 4px; min-height: 95px; padding: 12px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); text-align: center; }
.open-task-facts strong { color: var(--navy); font: 800 32px/1 var(--sans); }
.open-task-facts span { color: var(--muted); font: 14px/1.35 var(--sans); }
.open-task-scope { max-width: 940px; margin: 30px 0 16px; color: var(--muted); font: 16px/1.65 var(--sans); }
.open-task-link { color: var(--navy); font: 800 16px/1.5 var(--sans); text-underline-offset: 4px; }
.open-task-link:hover { color: var(--accent); }
.open-task-media { max-width: 1040px; margin: 0 auto; }
.open-task-video-frame { overflow: hidden; border: 1px solid var(--line-strong); border-radius: 12px; background: white; box-shadow: 0 20px 44px rgba(40,70,90,.12); }
.open-task-video-frame video { display: block; width: 100%; aspect-ratio: 16/9; object-fit: contain; background: white; }
.open-task-video-note { margin: 9px 0 0; color: var(--muted); font: 15px/1.45 var(--sans); }
.open-task-trace { margin-top: 28px; border: 1px solid var(--line); border-radius: 10px; background: var(--surface); }
.open-task-trace summary { padding: 16px 20px; color: var(--navy); font: 800 17px/1.4 var(--sans); cursor: pointer; }
.open-task-trace summary:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.open-task-trace summary span { margin-left: 6px; }
.open-task-trace ol { display: grid; grid-template-columns: 1fr 1fr; column-gap: 38px; row-gap: 0; margin: 0; padding: 0 27px 21px 51px; }
.open-task-trace li { padding: 7px 4px; color: var(--muted); font: 16px/1.45 var(--sans); }
.open-task-trace li::marker { color: var(--accent); font-weight: 800; }
.open-task-trace b { color: var(--navy); }

.closing { display: grid; max-width: 1172px; grid-template-columns: auto minmax(0,1fr) auto; align-items: center; gap: 28px; margin: 126px auto 68px; padding: 42px; border: 1px solid var(--line); border-radius: 16px; background: var(--blue-soft); }
.closing img { width: 60px; height: 60px; }
.closing .eyebrow { margin-bottom: 10px; }
.closing h2 { max-width: 780px; margin: 0; font-size: clamp(28px,3vw,40px); }
footer { display: flex; max-width: 1220px; justify-content: space-between; margin: auto; padding: 26px 24px 38px; border-top: 1px solid var(--line); color: var(--subtle); font: 14px/1.5 var(--sans); }

@keyframes bar-in { from { transform: scaleX(0); } to { transform: scaleX(1); } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; } }
@media (max-width: 1020px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-header nav { display: none; }
  .hero { grid-template-columns: 1fr; gap: 50px; }
  .hero-copy { max-width: 760px; }
  .decision-card { max-width: 760px; }
  .loop-tabs { grid-template-columns: repeat(2,1fr); }
  .loop-detail { grid-template-columns: 1fr; gap: 28px; }
  .result-row.action-row { grid-template-columns: 160px 1fr 95px; }
  .result-row.agent-row { grid-template-columns: 160px 1fr 100px 95px; }
  .comparison-key { grid-template-columns: 160px 1fr 95px; }
  .comparison-key.agent-key { grid-template-columns: 160px 1fr 100px 95px; }
  .comparison-key.agent-key span:last-child { grid-column: 3; }
  .closing { margin-right: 24px; margin-left: 24px; }
  .open-task-case-head { grid-template-columns: 1fr; }
  .open-task-facts { max-width: 480px; }
}
@media (max-width: 740px) {
  body { font-size: 16px; }
  .site-header { min-height: 66px; padding: 0 16px; }
  .brand img { width: 34px; height: 34px; }
  .hero { min-height: 0; padding: 68px 18px 58px; }
  .hero h1 { font-size: 48px; }
  .hero-lead { font-size: 18px; }
  .decision-card > header, .decision-card > footer { padding-right: 20px; padding-left: 20px; }
  .decision-flow { padding-right: 20px; padding-left: 20px; }
  .proof-strip { grid-template-columns: repeat(2,1fr); margin: 0 18px; }
  .proof-strip div:nth-child(2) { border-right: 0; }
  .proof-strip div:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section { padding: 96px 18px 0; }
  .split-head { grid-template-columns: 1fr; gap: 18px; }
  .section-head { margin-bottom: 36px; }
  .contribution-grid, .case-grid, .insight-row { grid-template-columns: 1fr; }
  .loop-tabs { grid-template-columns: 1fr 1fr; }
  .loop-tabs button { min-height: 112px; }
  .loop-detail { padding: 30px 24px; }
  .case-preview { min-height: 250px; padding: 38px 20px 0; }
  .case-video, .case-window { height: 212px; }
  .benchmark-shell { grid-template-columns: 1fr; }
  .task-tabs { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); border-right: 0; border-bottom: 1px solid var(--line); }
  .task-tabs button { min-width: 0; }
  .benchmark-board { padding: 25px 19px; }
  .benchmark-title { flex-direction: column; }
  .comparison-panel { padding: 18px; }
  .comparison-heading { flex-direction: column; }
  .speedup { justify-items: start; }
  .comparison-key { display: none; }
  .result-row.action-row, .result-row.agent-row { grid-template-columns: minmax(0,1fr) auto; }
  .result-name, .result-track { grid-column: 1 / 3; }
  .result-cost { text-align: left; }
  .action-row .row-open { grid-column: 1 / 3; }
  .step-list li { grid-template-columns: 30px minmax(0,1fr); }
  .step-status { grid-column: 2; }
  .closing { grid-template-columns: 1fr; margin: 96px 18px 48px; padding: 30px; }
  .open-task-shell { padding: 26px; }
  .open-task-heading > p:not(.eyebrow) { font-size: 17px; }
  .open-task-diagram { display: none; }
  .open-task-mobile-flow { display: grid; gap: 9px; margin: 28px 0 16px; padding: 0; list-style: none; counter-reset: pilot-flow; }
  .open-task-mobile-flow li { display: grid; grid-template-columns: 34px 1fr; column-gap: 12px; padding: 13px; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); counter-increment: pilot-flow; }
  .open-task-mobile-flow li::before { grid-row: span 2; content: counter(pilot-flow,decimal-leading-zero); color: var(--accent); font: 800 14px/1.45 var(--sans); }
  .open-task-mobile-flow b { color: var(--navy); font: 800 16px/1.4 var(--sans); }
  .open-task-mobile-flow span { color: var(--muted); font: 15px/1.5 var(--sans); }
  .open-task-status { grid-template-columns: 1fr; }
  .open-task-case-head { margin-top: 52px; }
  .open-task-facts { grid-template-columns: repeat(2,minmax(0,1fr)); min-width: 0; }
  .open-task-trace ol { grid-template-columns: 1fr; }
  .closing .button { justify-self: start; }
  footer { flex-direction: column; gap: 8px; padding-right: 18px; padding-left: 18px; }
}
@media (max-width: 460px) {
  .hero-actions { align-items: stretch; flex-direction: column; }
  .decision-card > header h2 { font-size: 24px; }
  .decision-flow li { gap: 13px; }
  .proof-strip div { min-height: 104px; }
  .open-task-facts span { font-size: 12px; }
  .open-task-trace ol { padding-left: 42px; }
}