@font-face {
  font-family: "Geist";
  src: url("assets/fonts/geist-latin.woff2") format("woff2");
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}

:root {
  --ink: #111318;
  --muted: #666c78;
  --line: #dfe2e7;
  --paper: #ffffff;
  --soft: #f5f6f8;
  --blue: #2256a6;
  --violet: #7652a6;
  --green: #427550;
  --orange: #b66b22;
  --pink: #a9486a;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Geist", Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.shell { width: min(calc(100% - 48px), var(--max)); margin-inline: auto; }

.entry {
  position: fixed;
  z-index: 100;
  inset: 0;
  display: grid;
  place-items: center;
  background: #fff;
  transition: opacity 700ms cubic-bezier(.2,.8,.2,1), visibility 700ms;
}
.entry.hidden { opacity: 0; visibility: hidden; pointer-events: none; }
.entry-mark { width: min(90vw, 1120px); transform: translateY(-2vh); }
.entry-logo { width: 100%; height: auto; max-height: 65vh; object-fit: contain; }
.entry > p { position: absolute; bottom: 44px; margin: 0; color: #8a8f98; font: 10px ui-monospace, monospace; letter-spacing: .35em; }

.language-toggle {
  position: fixed;
  z-index: 80;
  top: 18px;
  right: 20px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  min-height: 38px;
  padding: 4px 5px 4px 9px;
  border: 1px solid rgba(196, 202, 211, .78);
  border-radius: 999px;
  background: rgba(255, 255, 255, .86);
  color: #68707c;
  box-shadow: 0 10px 30px -16px rgba(19, 28, 43, .38);
  backdrop-filter: blur(14px) saturate(1.15);
  -webkit-backdrop-filter: blur(14px) saturate(1.15);
  cursor: pointer;
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}
.language-toggle:hover { border-color: #aab5c4; box-shadow: 0 13px 34px -16px rgba(19, 28, 43, .48); transform: translateY(-1px); }
.language-toggle:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }
.language-toggle svg { width: 15px; height: 15px; margin-right: 2px; fill: none; stroke: currentColor; stroke-linecap: round; stroke-linejoin: round; stroke-width: 1.6; }
.language-option { display: grid; place-items: center; min-width: 28px; height: 28px; padding: 0 7px; border-radius: 999px; font-size: 10px; font-weight: 720; line-height: 1; letter-spacing: .025em; transition: color 180ms ease, background-color 180ms ease, box-shadow 180ms ease; }
.language-divider { width: 1px; height: 12px; background: #dfe3e9; }
html[lang="en"] .language-en,
html[lang="zh-CN"] .language-zh { background: var(--ink); color: #fff; box-shadow: 0 3px 9px rgba(17, 19, 24, .2); }
html[lang="zh-CN"] body { font-family: "Geist", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif; }

.brand { display: inline-flex; align-items: center; width: fit-content; font-size: 15px; font-weight: 720; letter-spacing: -.025em; }
.hero { padding: 76px 0 70px; text-align: center; }
.section-kicker { color: var(--muted); font: 700 10px ui-monospace, monospace; letter-spacing: .16em; text-transform: uppercase; }
h1 { max-width: 1100px; margin: 24px auto 18px; font-size: clamp(29px, 6.2vw, 82px); font-weight: 660; line-height: .98; letter-spacing: -.065em; text-align: center; }
h1 span { display: block; white-space: nowrap; }
.authors { max-width: 1000px; margin: 0 auto; font-size: 16px; font-weight: 650; line-height: 1.9; }
.authors span { display: inline-block; white-space: nowrap; }
.authors sup { margin-left: 2px; font-size: .65em; }
.author-notes { margin: 12px 0 0; color: var(--muted); font-size: 12px; line-height: 1.6; }
.hero-lead { max-width: 980px; margin: 30px auto 0; color: #515762; font-size: clamp(17px, 2vw, 21px); line-height: 1.55; letter-spacing: -.018em; }
.hero-lead span { display: block; white-space: nowrap; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 32px; }
.button { display: inline-flex; align-items: center; gap: 12px; min-height: 44px; padding: 0 19px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; font-weight: 650; transition: transform 180ms ease, box-shadow 180ms ease; }
.button:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(20,25,35,.1); }
.button.dark { border-color: var(--ink); background: var(--ink); color: white; }
.code-button { padding-inline: 17px 20px; }
.github-icon, .arxiv-icon { width: 18px; height: 18px; fill: currentColor; }
.paper-button { padding-inline: 17px 20px; }
.hero-figure { margin-top: 72px; text-align: left; }
.hero-cover-figure { width: min(100%, 1080px); margin: 0 auto; }
.hero-cover-media { position: relative; overflow: hidden; border: 1px solid #cfd4dc; border-radius: 18px; background: #eef0f2; box-shadow: 0 30px 72px -42px rgba(13, 20, 31, .48); }
.hero-cover-media::after { position: absolute; inset: 0; border-radius: inherit; box-shadow: inset 0 0 0 1px rgba(255,255,255,.38); content: ""; pointer-events: none; }
.hero-cover-media a { display: block; }
.hero-cover-media img { display: block; width: 100%; height: auto; }
.method-figure figcaption { max-width: 860px; margin: 25px auto 0; color: #666c78; font: 13px/1.55 ui-monospace, monospace; }

.content-layout { display: grid; grid-template-columns: 165px minmax(0, 1fr); gap: 70px; padding-bottom: 100px; }
.contents { position: sticky; top: 110px; align-self: start; display: flex; flex-direction: column; gap: 11px; padding-top: 52px; }
.contents p { margin: 0 0 8px; color: #9aa0aa; font: 700 10px ui-monospace, monospace; letter-spacing: .15em; text-transform: uppercase; }
.contents a { color: #6d7380; font-size: 12px; transition: color 150ms ease, transform 150ms ease; }
.contents a:hover, .contents a.active { color: var(--blue); transform: translateX(3px); }
.article { container-type: inline-size; }
.section { scroll-margin-top: 86px; padding: 72px 0; }
.ruled { border-top: 1px solid var(--line); }
.section-kicker { margin: 0 0 18px; color: var(--blue); }
.section h2 { max-width: none; margin: 0; font-size: clamp(13px, 3.2vw, 42px); font-size: clamp(12px, 4.2cqi, 42px); font-weight: 630; line-height: 1.06; letter-spacing: -.045em; white-space: nowrap; }
.section-intro { width: 100%; max-width: none; margin: 25px 0 0; color: #5b616c; font-size: 16px; line-height: 1.65; }
.abstract-grid { display: grid; grid-template-columns: 120px 1fr; column-gap: 36px; row-gap: 18px; margin-top: 48px; }
.abstract-grid h3 { grid-row: span 2; margin: 3px 0 0; font: 700 11px ui-monospace, monospace; letter-spacing: .13em; text-transform: uppercase; }
.abstract-grid p { max-width: 760px; margin: 0; color: #454b55; font-size: 16px; line-height: 1.72; }
.research-question { display: grid; grid-template-columns: minmax(118px, .2fr) minmax(0, 1fr); gap: clamp(24px, 4cqi, 46px); align-items: start; margin-top: 42px; padding: 32px 34px; border-left: 3px solid var(--blue); background: linear-gradient(105deg, #edf3fc 0%, #f8fbff 72%, #fff 100%); }
.research-question span { padding-top: 4px; color: var(--blue); font: 700 10px ui-monospace, monospace; letter-spacing: .13em; text-transform: uppercase; white-space: nowrap; }
.research-question p { max-width: none; margin: 0; font-size: clamp(18px, 2.3cqi, 23px); font-weight: 600; line-height: 1.28; letter-spacing: -.03em; }

/* Keep long-form copy visually calm and aligned like a typeset paper page. */
.abstract-grid p,
.research-question p,
.section-intro,
.method-figure figcaption,
.rollout-group-title > p:last-child,
.rollout-task-copy,
.finding-list p,
.discussion-copy p {
  text-align: justify;
  text-align-last: left;
  text-justify: inter-word;
  hyphens: auto;
}

.context-grid { display: grid; grid-template-columns: repeat(6, minmax(0, 1fr)); gap: 18px; margin-top: 45px; }
.context-card { --accent: var(--blue); position: relative; isolation: isolate; grid-column: span 2; display: flex; flex-direction: column; min-width: 0; min-height: 0; padding: 26px 24px 23px; overflow: hidden; border: 1px solid var(--line); border-radius: 12px; background: #fff; box-shadow: 0 10px 30px -30px rgba(17, 24, 39, .45); transition: transform 360ms cubic-bezier(.2,.75,.2,1), border-color 360ms ease, box-shadow 360ms ease; }
.context-card:nth-child(4) { grid-column: 2 / span 2; }
.context-card::before { position: absolute; top: 0; right: 0; left: 0; height: 3px; background: var(--accent); content: ""; transform: scaleX(.34); transform-origin: left; transition: transform 420ms cubic-bezier(.2,.75,.2,1); }
.context-card::after { position: absolute; z-index: -1; inset: 0; background: radial-gradient(circle at 82% 8%, color-mix(in srgb, var(--accent) 14%, transparent) 0, transparent 48%), linear-gradient(145deg, color-mix(in srgb, var(--accent) 7%, transparent), transparent 58%); content: ""; opacity: 0; transition: opacity 360ms ease; }
.context-card.blue { --accent: var(--blue); }
.context-card.violet { --accent: var(--violet); }
.context-card.green { --accent: var(--green); }
.context-card.orange { --accent: var(--orange); }
.context-card.pink { --accent: var(--pink); }
.context-card header { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 28px; }
.card-number { color: color-mix(in srgb, var(--accent) 58%, #a1a7b1); font: 620 13px/1 "Geist", Inter, ui-sans-serif, sans-serif; transition: color 320ms ease, transform 420ms cubic-bezier(.2,.75,.2,1); }
.card-label { margin: 0; color: var(--accent); font: 620 11px/1.2 "Geist", Inter, ui-sans-serif, sans-serif; letter-spacing: .01em; }
.context-card h3 { min-height: 0; margin: 0 0 14px; font-size: clamp(18px, 1.7vw, 22px); line-height: 1.14; letter-spacing: -.035em; white-space: nowrap; }
.context-card > p { margin: 0; color: #626a75; font-size: 14px; line-height: 1.62; text-align: justify; text-align-last: left; text-justify: inter-word; hyphens: auto; }
.context-card ul { display: flex; flex-wrap: wrap; gap: 6px; margin: 24px 0 0; padding: 16px 0 0; border-top: 1px solid #e7e9ed; list-style: none; }
.context-card li { display: inline-flex; align-items: center; gap: 6px; padding: 5px 7px; border: 1px solid var(--line); border-radius: 5px; background: #f7f8fa; color: #4f5661; font-size: 10px; font-weight: 560; line-height: 1.2; transition: color 280ms ease, border-color 280ms ease, background-color 280ms ease, transform 320ms cubic-bezier(.2,.75,.2,1); }
.context-card li::before { width: 4px; height: 4px; flex: 0 0 auto; border-radius: 50%; background: var(--accent); content: ""; opacity: 0; transform: scale(0); transition: opacity 240ms ease, transform 320ms cubic-bezier(.2,.75,.2,1); }

@media (hover: hover) and (pointer: fine) {
  .context-card:hover { border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); box-shadow: 0 20px 44px -28px color-mix(in srgb, var(--accent) 54%, transparent), 0 14px 30px -24px rgba(15, 23, 42, .4); transform: translateY(-6px); }
  .context-card:hover::before { transform: scaleX(1); }
  .context-card:hover::after { opacity: 1; }
  .context-card:hover .card-number { color: var(--accent); transform: translate3d(-3px, 2px, 0) scale(1.08); }
  .context-card:hover li { border-color: color-mix(in srgb, var(--accent) 28%, var(--line)); background: color-mix(in srgb, var(--accent) 8%, white); color: color-mix(in srgb, var(--accent) 76%, var(--ink)); transform: translateY(-2px); }
  .context-card:hover li::before { opacity: .8; transform: scale(1); }
}

.method-figure { margin: 45px 0 0; }
.method-figure a { display: block; padding: 12px; border: 1px solid var(--line); background: #fff; }
.method-figure img { width: 100%; height: auto; }
.method-figure figcaption { margin: 18px 0 0; max-width: none; }
.pipeline { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 42px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pipeline article { padding: 25px 18px 28px; border-right: 1px solid var(--line); }
.pipeline article:last-child { border-right: 0; }
.pipeline span { display: grid; place-items: center; width: 25px; height: 25px; border-radius: 50%; background: var(--ink); color: white; font: 700 10px ui-monospace, monospace; }
.pipeline h3 { margin: 26px 0 8px; font-size: 15px; }
.pipeline p { margin: 0; color: #6a707b; font-size: 12px; line-height: 1.55; }

.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); margin: 45px 0 34px; border-block: 1px solid var(--line); }
.metric-row div { display: flex; flex-direction: column; gap: 4px; padding: 28px 24px; border-right: 1px solid var(--line); }
.metric-row div:last-child { border-right: 0; }
.metric-row strong { font-size: 38px; font-weight: 590; letter-spacing: -.05em; }
.metric-row span { color: var(--muted); font: 10px ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; }
.table-wrap { overflow-x: auto; }
table { width: 100%; min-width: 700px; border-collapse: collapse; font-size: 12px; }
th { padding: 13px 12px; border-bottom: 1px solid var(--ink); color: #7a808b; font: 700 9px ui-monospace, monospace; letter-spacing: .08em; text-align: left; text-transform: uppercase; }
td { padding: 14px 12px; border-bottom: 1px solid var(--line); }
tbody tr { transition: background 150ms ease; }
tbody tr:nth-child(even) { background: #f5f8fc; }
tbody tr:hover { background: #eaf1fb; }
td:nth-child(n+3) { font-family: ui-monospace, monospace; }
.table-note { margin: 14px 0 0; color: #7b818c; font: 11px/1.55 ui-monospace, monospace; }
.demo-section { --demo-blue: #275da8; }
.demo-legend { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 32px; padding: 15px 0; border-block: 1px solid var(--line); color: #68707b; font: 10px ui-monospace, monospace; letter-spacing: .04em; text-transform: uppercase; }
.demo-legend span { display: inline-flex; align-items: center; gap: 8px; }
.legend-dot { width: 7px; height: 7px; border-radius: 50%; }
.blue-dot { background: var(--blue); }
.green-dot { background: #3d7b52; }
.gray-dot { background: #9aa0aa; }
.demo-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; width: 100%; min-width: 0; margin-top: 28px; }
.demo-rollout-group { grid-column: 1 / -1; min-width: 0; padding: 34px 0 44px; border-top: 1px solid var(--line); }
.demo-rollout-group:first-child { padding-top: 4px; border-top: 0; }
.rollout-group-head { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 34px; align-items: end; margin-bottom: 22px; }
.rollout-group-title { min-width: 0; }
.rollout-kicker { display: flex; align-items: center; gap: 12px; margin: 0 0 12px; color: var(--blue); font-size: 11px; font-weight: 620; }
.rollout-group-title h3 { margin: 0; font-size: clamp(24px, 3vw, 34px); font-weight: 650; letter-spacing: -.045em; }
.rollout-group-title > p:last-child { max-width: 720px; margin: 9px 0 0; color: #69707b; font-size: 13px; line-height: 1.55; }
.clip-count { align-self: end; padding-bottom: 3px; color: #858c96; font-size: 12px; white-space: nowrap; }
.rollout-rail-wrap { position: relative; }
.rollout-rail { display: flex; gap: 18px; min-width: 0; overflow-x: auto; padding: 1px 1px 5px; scroll-behavior: smooth; scroll-snap-type: x proximity; scrollbar-width: none; }
.rollout-rail::-webkit-scrollbar { display: none; }
.rollout-card { flex: 0 0 390px; min-width: 0; margin: 0; scroll-snap-align: start; }
.demo-rollout-group[data-clips="3"] .rollout-card { flex-basis: calc((100% - 36px) / 3); }
.demo-rollout-group[data-clips="2"] .rollout-card { flex-basis: calc((100% - 18px) / 2); }
.demo-rollout-group[data-clips="1"] .rollout-rail { justify-content: center; }
.rollout-media { position: relative; overflow: hidden; border: 1px solid #e0e3e8; border-radius: 9px; background: #11151b; box-shadow: 0 1px 1px rgba(17, 24, 39, .04); }
.rollout-media video, .rollout-media img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: contain; }
.rollout-media video { background: #11151b; }
.goal-image-media { display: grid; place-items: center; background: #f3f3f1; }
.goal-image-media img { object-fit: contain; object-position: center; }
.rollout-media.video-load-failed::after { position: absolute; inset: auto 12px 12px; content: "Video could not be loaded."; padding: 7px 9px; border-radius: 4px; background: rgba(255, 241, 241, .95); color: #9b2c2c; font-size: 10px; }
html[lang="zh-CN"] .rollout-media.video-load-failed::after { content: "视频无法加载。"; }
.rollout-card figcaption { margin: 13px 2px 0; }
.rollout-caption-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; }
.rollout-caption-head h4 { margin: 0; font-size: 16px; font-weight: 620; letter-spacing: -.02em; }
.rollout-caption-head > span { flex: 0 0 auto; font-size: 11px; font-weight: 570; }
.rollout-input { color: #737b86; }
.rollout-result.high { color: #2f7147; }
.rollout-result.mid { color: #946b1e; }
.rollout-result.low { color: #a44848; }
.rollout-card figcaption p { margin: 5px 0 0; color: #666e79; font-size: 12px; line-height: 1.45; }
.rollout-card figcaption .rollout-detail { margin-top: 3px; color: #8a919b; font-size: 10px; }
.demo-rollout-group .video-overlay { top: 12px; left: 12px; right: 12px; }
.demo-rollout-group .video-overlay span { padding: 0; border: 0; background: transparent; font-size: 9px; font-weight: 620; letter-spacing: .01em; text-shadow: 0 1px 5px rgba(0, 0, 0, .9); backdrop-filter: none; }
.rollout-nav { position: absolute; z-index: 3; top: calc(50% - 42px); display: grid; place-items: center; width: 42px; height: 42px; padding: 0; border: 1px solid #dfe2e7; border-radius: 50%; background: rgba(255,255,255,.96); color: #3b414a; box-shadow: 0 8px 24px rgba(17, 24, 39, .12); cursor: pointer; transform: translateY(-50%); transition: opacity 160ms ease, transform 160ms ease; }
.rollout-nav:hover { transform: translateY(-50%) scale(1.04); }
.rollout-nav span { font: 400 27px/1 "Geist", sans-serif; transform: translateY(-1px); }
.rollout-nav.previous { left: -21px; }
.rollout-nav.next { right: -21px; }
.rollout-nav:disabled { opacity: 0; pointer-events: none; }
.demo-index { color: #a1a7b1; font: 700 10px ui-monospace, monospace; }
.context-family-group .rollout-caption-head h4 { display: inline-flex; align-items: baseline; gap: 9px; }
.context-family-group .rollout-model { color: #555e69; }
.context-family-group .rollout-task-copy { max-width: 520px; margin-top: 8px; }
.history-enriched-layout { display: grid; grid-template-columns: minmax(330px, .9fr) minmax(0, 1.35fr); gap: 34px; align-items: start; }
.history-enriched-layout > .rollout-rail-wrap { position: sticky; top: 24px; }
.history-enriched-group .rollout-rail { justify-content: stretch; }
.history-enriched-group .rollout-card { flex-basis: 100%; }
.history-summary { position: relative; display: grid; grid-template-rows: auto minmax(0, 1fr); min-width: 0; min-height: 0; padding: 2px 0 0; overflow: hidden; }
.history-summary-heading { position: relative; z-index: 2; display: flex; align-items: end; justify-content: space-between; gap: 18px; padding: 0 10px 13px 0; border-bottom: 1px solid var(--line); background: #fff; }
.history-summary-heading p { margin: 0; color: var(--blue); font-size: 10px; font-weight: 650; }
.history-summary-heading h4 { margin: 0; font-size: 16px; font-weight: 650; letter-spacing: -.025em; }
.history-summary ol { min-height: 0; margin: 0; padding: 0 8px 0 0; overflow-y: auto; overscroll-behavior: contain; scroll-behavior: smooth; scrollbar-color: #c8d2df transparent; scrollbar-width: thin; list-style: none; }
.history-summary ol::-webkit-scrollbar { width: 5px; }
.history-summary ol::-webkit-scrollbar-track { background: transparent; }
.history-summary ol::-webkit-scrollbar-thumb { border-radius: 999px; background: #c8d2df; }
.history-summary li { position: relative; display: grid; grid-template-columns: 29px minmax(0, 1fr); gap: 11px; padding: 12px 8px 12px 10px; border-bottom: 1px solid #eceef1; border-left: 2px solid transparent; transition: border-color 240ms ease, background-color 240ms ease, opacity 240ms ease; }
.history-summary li:last-child { border-bottom: 0; }
.history-summary li > span { display: grid; place-items: center; align-self: start; width: 25px; height: 25px; border-radius: 50%; background: #eef3fa; color: var(--blue); font-size: 8px; font-weight: 720; font-variant-numeric: tabular-nums; }
.history-summary li p { margin: 0; color: #646c77; font-size: 10.5px; line-height: 1.48; text-align: justify; text-justify: inter-word; }
.history-summary li strong { display: block; margin-bottom: 2px; color: var(--ink); font-size: 11px; font-weight: 680; }
.history-summary code { padding: 1px 3px; border-radius: 3px; background: #f1f3f6; color: #38475c; font: .92em ui-monospace, "SFMono-Regular", Consolas, monospace; }
.history-summary.is-synced li.is-complete { opacity: .58; }
.history-summary.is-synced li.is-active { border-left-color: var(--blue); background: linear-gradient(90deg, #f2f6fc 0%, rgba(247, 250, 255, .7) 72%, transparent 100%); opacity: 1; }
.history-summary.is-synced li.is-active > span { background: var(--blue); color: #fff; box-shadow: 0 4px 12px rgba(34, 86, 166, .2); }
.rollout-config-tabs { display: flex; gap: 18px; margin-top: 12px; overflow-x: auto; border-bottom: 1px solid var(--line); scrollbar-width: none; }
.rollout-config-tabs::-webkit-scrollbar { display: none; }
.rollout-config-tabs button { flex: 0 0 auto; padding: 5px 0 8px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: #808791; font: 620 10px/1.2 "Geist", sans-serif; cursor: pointer; }
.rollout-config-tabs button[aria-selected="true"] { border-bottom-color: var(--blue); color: var(--ink); }
.rollout-config-tabs button:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.video-overlay { position: absolute; top: 10px; left: 10px; right: 10px; display: flex; justify-content: space-between; gap: 8px; pointer-events: none; }
.video-overlay span { padding: 6px 8px; border: 1px solid rgba(255,255,255,.2); border-radius: 4px; background: rgba(12,17,24,.68); color: #fff; font: 700 8px ui-monospace, monospace; letter-spacing: .06em; text-transform: uppercase; backdrop-filter: blur(8px); }
.video-error { position: absolute; inset: auto 15px 15px; margin: 0; padding: 9px; border-radius: 4px; background: #fff1f1; color: #9b2c2c; font-size: 11px; line-height: 1.45; }
.model-comparison { margin-top: 54px; padding: 48px 0 8px; border-top: 1px solid var(--line); }
.comparison-heading { display: block; }
.comparison-heading h3 { margin: 10px 0 0; font-size: 30px; letter-spacing: -.045em; }
.comparison-context { display: grid; grid-template-columns: auto minmax(0, 2fr) auto minmax(0, 1fr); gap: 8px 12px; align-items: baseline; margin-top: 22px; padding: 12px 0; border-block: 1px solid var(--line); }
.comparison-context span { color: #858d98; font: 700 8px/1.4 ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; }
.comparison-context b { color: #38414e; font-size: 10px; line-height: 1.4; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 18px; }
.comparison-card { min-width: 0; }
.comparison-card header { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.comparison-card header span { font-size: 15px; font-weight: 700; }
.comparison-card header strong { font: 620 10px "Geist", sans-serif; }
.result-success { color: #2d6b40; }
.result-failure { color: #984242; }
.comparison-stage { position: relative; overflow: hidden; border: 1px solid #e0e3e8; border-radius: 9px; background: #11151b; }
.comparison-stage video { display: block; width: 100%; aspect-ratio: 4 / 3; background: #11151b; object-fit: contain; }
.comparison-stage .video-overlay { justify-content: flex-end; }
.self-history-comparison .comparison-stage::before { position: absolute; z-index: 1; top: 6%; left: 0; width: 20%; height: 8%; background: #11151b; content: ""; pointer-events: none; }
.self-history-comparison .comparison-stage .video-overlay { z-index: 2; flex-direction: row-reverse; justify-content: space-between; }
.comparison-card dl { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; margin: 12px 0 0; padding-top: 12px; border-top: 1px solid var(--line); }
.comparison-card dl div { min-width: 0; }
.comparison-card dt { color: #89909b; font: 700 8px ui-monospace, monospace; letter-spacing: .08em; text-transform: uppercase; }
.comparison-card dd { margin: 5px 0 0; font-size: 10px; font-weight: 650; line-height: 1.4; }
.kimi-comparison .section-kicker { color: #6c48a4; }

.finding-list { display: grid; gap: 10px; margin-top: 44px; }
.finding-list article { position: relative; padding: 28px 110px 28px 30px; border: 1px solid var(--line); overflow: hidden; transition: transform 280ms ease, border-color 280ms ease; }
.finding-list article::after { position: absolute; top: 50%; right: 18px; content: attr(data-index); color: var(--blue); font: 700 110px/1 ui-monospace, monospace; opacity: .055; pointer-events: none; transform: translateY(-50%); }
.finding-list article:hover { transform: translateX(6px); border-color: #a7bbdb; }
.finding-list span { color: var(--blue); font: 700 9px ui-monospace, monospace; letter-spacing: .12em; text-transform: uppercase; }
.finding-list h3 { margin: 10px 0 7px; font-size: 20px; letter-spacing: -.025em; }
.finding-list p { max-width: 680px; margin: 0; color: #666c78; font-size: 14px; line-height: 1.55; }
.split-section { display: block; }
.split-section h2 { font-size: inherit; }
.discussion-copy { width: 100%; max-width: none; padding-top: 34px; }
.discussion-copy p { margin: 0 0 24px; color: #515762; font-size: 16px; line-height: 1.7; }
.code-block { position: relative; margin-top: 40px; border: 1px solid var(--line); background: #f7f8fa; }
.code-block button { position: absolute; top: 14px; right: 14px; padding: 8px 11px; border: 1px solid var(--line); border-radius: 4px; background: white; color: #454b55; font: 700 9px ui-monospace, monospace; cursor: pointer; text-transform: uppercase; }
pre { margin: 0; padding: 32px; overflow-x: auto; font: 12px/1.7 ui-monospace, "SFMono-Regular", Consolas, monospace; }

/* OpenWAM-inspired editorial labels: sentence case, compact spacing, and Geist Sans. */
.section-kicker,
.contents p,
.abstract-grid h3,
.research-question span,
.card-label,
.metric-row span,
th,
.demo-legend,
.video-overlay span,
.comparison-context span,
.comparison-card header strong,
.comparison-card dt,
.finding-list span,
.code-block button {
  font-family: "Geist", Inter, ui-sans-serif, sans-serif;
  letter-spacing: .015em;
  text-transform: none;
}

.section-kicker,
.abstract-grid h3,
.research-question span {
  font-size: 12px;
  font-weight: 620;
}

.method-figure figcaption,
.table-note {
  font-family: "Geist", Inter, ui-sans-serif, sans-serif;
}

.card-number,
.pipeline span,
.demo-index,
.finding-list article::after {
  font-family: "Geist", Inter, ui-sans-serif, sans-serif;
  font-variant-numeric: tabular-nums;
  letter-spacing: -.02em;
}

footer { border-top: 1px solid var(--line); background: var(--soft); }
.footer-inner { display: grid; grid-template-columns: 1fr 1fr 1fr; align-items: center; min-height: 150px; }
.footer-inner p { justify-self: center; color: var(--muted); font-size: 12px; }
.footer-inner > div { justify-self: end; display: flex; gap: 18px; color: #575d67; font-size: 11px; }

@media (max-width: 900px) {
  .content-layout { grid-template-columns: 1fr; }
  .contents { position: static; flex-direction: row; flex-wrap: wrap; padding-top: 30px; }
  .contents p { width: 100%; }
  .context-grid { display: flex; gap: 14px; overflow-x: auto; padding: 2px 2px 18px; scroll-snap-type: x mandatory; scrollbar-width: thin; }
  .context-card { flex: 0 0 min(300px, 82vw); min-height: 0; scroll-snap-align: start; }
  .pipeline { grid-template-columns: 1fr 1fr; }
  .demo-grid { grid-template-columns: 1fr; }
  .demo-rollout-group[data-clips] .rollout-card { flex-basis: min(420px, 78vw); }
  .demo-rollout-group[data-clips="1"] .rollout-rail { justify-content: flex-start; padding-inline: calc((100% - min(420px, 78vw)) / 2); }
  .history-enriched-layout { grid-template-columns: 1fr; gap: 28px; }
  .history-enriched-layout > .rollout-rail-wrap { position: static; }
  .history-enriched-group.demo-rollout-group[data-clips="1"] .rollout-rail { justify-content: center; padding-inline: 0; }
  .history-enriched-group.demo-rollout-group[data-clips="1"] .rollout-card { flex-basis: min(480px, 100%); }
  .history-summary { width: min(100%, 680px); margin-inline: auto; }
  .pipeline article:nth-child(2) { border-right: 0; }
  .pipeline article:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
}

@media (max-width: 640px) {
  .language-toggle { top: 11px; right: 11px; min-height: 34px; padding: 3px 4px 3px 8px; }
  .language-toggle svg { width: 14px; height: 14px; }
  .language-option { min-width: 26px; height: 26px; padding-inline: 6px; }
  .shell { width: min(calc(100% - 28px), var(--max)); }
  .hero { padding-top: 74px; }
  h1 { font-size: clamp(27px, 7.2vw, 44px); }
  .hero-lead span { display: inline; white-space: normal; }
  .hero-cover-media { border-radius: 12px; }
  .pipeline, .metric-row, .split-section, .footer-inner { grid-template-columns: 1fr; }
  .comparison-heading, .comparison-grid { grid-template-columns: 1fr; }
  .demo-rollout-group { padding: 28px 0 34px; }
  .rollout-group-head { grid-template-columns: 1fr; gap: 8px; margin-bottom: 18px; }
  .clip-count { display: none; }
  .demo-rollout-group[data-clips] .rollout-card { flex-basis: min(360px, 86vw); }
  .rollout-nav { display: none; }
  .model-comparison { padding: 36px 0 4px; }
  .comparison-context { grid-template-columns: auto 1fr; }
  .abstract-grid { grid-template-columns: 1fr; }
  .abstract-grid h3 { grid-row: auto; }
  .research-question { grid-template-columns: 1fr; gap: 10px; padding: 24px 22px; }
  .research-question span { padding-top: 0; }
  .pipeline article, .metric-row div { border-right: 0; border-bottom: 1px solid var(--line); }
  .pipeline article:last-child, .metric-row div:last-child { border-bottom: 0; }
  .finding-list article { padding-right: 60px; }
  .footer-inner { gap: 22px; padding: 35px 0; text-align: center; }
  .footer-inner .brand, .footer-inner p, .footer-inner > div { justify-self: center; }
}

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

.future-directions { padding-left: 20px; color: #515762; font-size: 14px; line-height: 1.65; }
.future-directions li { margin: 16px 0; }
.future-directions b, .future-directions span { display: block; }

.hero-cover-figure figcaption, .paper-figure figcaption { margin: 18px 0 0; color: #666c78; font: 13px/1.6 ui-monospace, monospace; text-align: left; }
.paper-figure { margin: 46px 0 0; }
.paper-figure a { display: block; padding: 12px; border: 1px solid var(--line); background: #fff; }
.paper-figure img { display: block; width: 100%; height: auto; }
.paper-figure figcaption b { color: #4f5968; }

/* Keep each experiment family's results and demonstrations together. */
.experiment-index { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 10px; margin: 24px 0; }
.experiment-index a { display: flex; align-items: center; gap: 10px; padding: 15px 12px; border: 1px solid var(--line); border-radius: 6px; color: var(--ink); font-size: 12px; line-height: 1.45; }
.experiment-index a:hover { border-color: var(--blue); background: #f5f8fd; }
.experiment-index span { color: var(--blue); font: 600 11px ui-monospace, monospace; }
.experiment-anchor, .experiment-family { scroll-margin-top: 32px; }
.experiment-family { padding-top: 48px; margin-top: 48px; border-top: 2px solid var(--ink); min-width: 0; }
.experiment-family-heading { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 26px; }
.experiment-number { display: grid; place-items: center; flex: 0 0 38px; height: 38px; border-radius: 50%; color: white; background: var(--blue); font: 600 12px ui-monospace, monospace; }
.experiment-family-heading h3 { margin: 1px 0 10px; font-size: clamp(24px, 3vw, 32px); line-height: 1.2; letter-spacing: -.035em; }
.experiment-family-heading p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.65; }
.family-demos { gap: 26px; margin-top: 30px; }
.family-demos .demo-rollout-group { padding: 24px 0 10px; }
.family-demos .rollout-group-title h4 { margin: 0; font-size: 22px; line-height: 1.3; font-weight: 620; letter-spacing: -.03em; }
.family-demos .rollout-caption-head h5 { margin: 0; font-size: 14px; font-weight: 620; }
.family-demos .rollout-group-head { grid-template-columns: 1fr; margin-bottom: 18px; }
.experiment-family[data-layout="paired"] .demo-rollout-group { grid-column: auto; border-top: 0; padding-top: 4px; }
.experiment-family[data-layout="paired"] .rollout-card { flex-basis: 100%; }
.experiment-family[data-layout="paired"] .rollout-group-head { display: block; min-height: 116px; }
@media (max-width: 1000px) {
  .experiment-family[data-layout="paired"] .demo-rollout-group[data-clips="1"] .rollout-rail { padding-inline: 0; }
  .experiment-family[data-layout="paired"] .demo-rollout-group[data-clips="1"] .rollout-card { flex-basis: 100%; }
}
@media (max-width: 760px) {
  .experiment-index { grid-template-columns: 1fr 1fr; }
  .experiment-family { padding-top: 30px; margin-top: 34px; }
  .experiment-family-heading { gap: 12px; }
  .experiment-family[data-layout="paired"] .rollout-group-head { min-height: 0; }
}

/* Aligned three-way comparisons for human and robot demonstrations. */
.three-way-comparison .rollout-rail { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); align-items: start; overflow: visible; padding: 0; }
.three-way-comparison .rollout-card { width: 100%; }
.three-way-comparison .rollout-nav { display: none; }
.three-way-comparison .rollout-caption-head { flex-wrap: wrap; gap: 5px 10px; }
.three-way-comparison .rollout-media video { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: contain; }
@media (max-width: 760px) {
  .three-way-comparison .rollout-rail { grid-template-columns: 1fr; gap: 24px; }
}

.robot-run-summary { margin-top: 12px; padding-top: 10px; border-top: 1px solid var(--line); }
.robot-run-summary > summary { color: var(--blue); font-size: 11px; font-weight: 600; cursor: pointer; }
.robot-run-summary .history-summary { margin-top: 12px; }
.robot-run-summary .history-summary-heading { padding-bottom: 8px; }

/* Keep each goal reference beside its corresponding execution. */
.goal-image-group .rollout-rail { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: start; overflow: visible; padding: 0; }
.goal-image-group .rollout-card { width: 100%; }
.goal-image-group .rollout-nav { display: none; }
.goal-image-group .rollout-media img, .goal-image-group .rollout-media video { width: 100%; height: auto; aspect-ratio: 4 / 3; object-fit: contain; }
@media (max-width: 760px) {
  .goal-image-group .rollout-rail { grid-template-columns: 1fr; gap: 24px; }
}