@font-face {
  font-family: "Noto Sans";
  font-style: normal;
  font-weight: 400 800;
  font-display: swap;
  src: url("assets/fonts/noto-sans-latin.woff2") format("woff2");
}
@font-face {
  font-family: "Noto Sans";
  font-style: italic;
  font-weight: 400 800;
  font-display: swap;
  src: url("assets/fonts/noto-sans-latin-italic.woff2") format("woff2");
}
@font-face {
  font-family: "Google Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("assets/fonts/google-sans-regular.ttf") format("truetype");
}
@font-face {
  font-family: "Google Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("assets/fonts/google-sans-semibold.ttf") format("truetype");
}

@font-face {
  font-family: "Google Sans";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("assets/fonts/google-sans-bold.ttf") format("truetype");
}

:root {
  --font-body: "Noto Sans", sans-serif;
  --font-display: "Google Sans", sans-serif;
  --hero-gutter: 40px;
  --paper: #f3f8fc;
  --ink: #102a43;
  --muted: #61758a;
  --line: #cbd9e6;
  --green: #256da8;
  --green-dark: #0d2f4f;
  --mint: #cfe8f7;
  --orange: #42a5d5;
  --yellow: #8ec5e8;
  --paper-green: #16874b;
  --white: #ffffff;
  --max: 960px;
  --content: 880px;
  --section-title-size: clamp(1.9rem,3vw,2.5rem);
  --experiment-title-size: clamp(1.65rem,2.5vw,2rem);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 24px; }
body { margin: 0; background: linear-gradient(180deg,#f9fcff 0%,var(--paper) 42%,#edf5fb 100%); color: var(--ink); font: 400 15px/1.55 var(--font-body); }
::selection { background: var(--mint); color: var(--green-dark); }
a { color: inherit; text-decoration: none; }
.shell { width: min(var(--max), calc(100% - 56px)); margin: 0 auto; }
.content-shell { max-width: var(--content); }
.skip-link { position: fixed; top: 8px; left: 8px; z-index: 200; padding: 9px 12px; background: var(--ink); color: white; transform: translateY(-150%); }
.skip-link:focus { transform: translateY(0); }
.hero { display: flex; padding: 0 0 12px; align-items: center; flex-direction: column; gap: 20px; text-align: center; }
.hero-copy { display: flex; width: min(1000px,calc(100% - var(--hero-gutter))); padding: 28px 0 0; align-items: center; justify-content: flex-start; flex-direction: column; }
.eyebrow { margin: 0 0 22px; color: var(--green); font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; }
h1,h2 { font-family: var(--font-body); }
h2 { font-weight: 700; }
.hero-title { font-family: Arial, sans-serif; }
button,input,select,textarea { font-family: var(--font-body); }
h1 { max-width: 900px; margin: 0 auto 26px; color: #111; font-weight: 700; letter-spacing: normal; line-height: 1.14; text-wrap: balance; }
.hero-title { margin-bottom: 0; line-height: 1.22; }
.title-accent { display: block; margin-bottom: 8px; color: #00a3df; font-size: 1.12em; }
.main-video { width: min(960px,calc(100% - var(--hero-gutter))); margin: 12px auto; }
.hero-paper-title { display: block; color: #1b2533; font-size: clamp(1.55rem,2.6vw,2.25rem); text-shadow: none; }
.hero-title ::selection { background: transparent; color: inherit; }
.hero-title ::-moz-selection { background: transparent; color: inherit; }
.resource-row { display: flex; gap: 7px; margin-top: 14px; justify-content: center; flex-wrap: wrap; }
.resource-row a { display: inline-flex; min-height: 36px; padding: 6px 16px; border: 0; border-radius: 999px; background: #363636; color: #fff; align-items: center; justify-content: center; gap: 7px; white-space: nowrap; transition: background-color .16s ease; }
.resource-row span { font-size: .9rem; font-weight: 500; line-height: 1.5; }
.resource-row .resource-icon { display: block; width: 15px; height: 15px; flex: 0 0 15px; }
.resource-row a:hover { background: #252525; }
.resource-row a[aria-disabled="true"] { opacity: .58; cursor: not-allowed; }
.resource-row a[aria-disabled="true"]:hover { background: #363636; }
.paper-figure { margin: 0; padding: 0; border: 0; background: transparent; }
.paper-figure img { display: block; width: 100%; height: auto; padding: 8px; border: 1px solid #b8cad9; border-radius: 6px; background: var(--white); box-shadow: 0 12px 28px rgba(16,42,67,.11),0 2px 8px rgba(16,42,67,.07); }
.paper-figure figcaption { display: block; margin: 14px 3px 0; padding: 0; border: 0; background: transparent; color: #405b73; font-size: .9rem; line-height: 1.52; }
.paper-figure figcaption strong { color: var(--ink); font-weight: 700; }
.paper-figure figcaption span { color: inherit; font-weight: 400; letter-spacing: normal; text-transform: none; }
.paper-figure figcaption i { color: var(--green); font-family: inherit; }
.hero-figure { width: 100%; text-align: left; }
.hero-presentation { width: 100%; background: #e7f0f8; color: var(--green-dark); text-align: left; }
.hero-presentation .section-pad { padding-top: 24px; }
.hero-presentation h2 { margin: 0 0 24px; font-size: var(--section-title-size); font-weight: 700; letter-spacing: -.03em; line-height: 1.05; text-align: center; }
.hero-video-showcase { width: 100%; padding: 20px 0 16px; background: #e7f0f8; }
.video-speed-note { margin: 8px 0 0; color: #111; font-size: .78rem; text-align: center; }
.hero-featured-player { display: block; width: 100%; height: auto; aspect-ratio: 16/9; margin: 0 auto; border: 0; border-radius: 10px; background: #000; box-shadow: 0 14px 34px rgba(16,42,67,.14); }
video::-webkit-media-controls-mute-button { display: none !important; }
video::-webkit-media-controls-volume-slider { display: none !important; }
video::-webkit-media-controls-volume-control-container { display: none !important; }
.hero-demo-gallery { position: relative; width: min(960px,calc(100% - var(--hero-gutter))); margin: 0 auto; }
.hero-demo-viewport { position: relative; padding: 0 24px; }
.hero-demo-track { position: relative; display: grid; overflow-x: auto; padding: 0 0 6px; grid-auto-columns: calc((100% - 24px)/3); grid-auto-flow: column; gap: 12px; scroll-behavior: auto; scroll-snap-type: x mandatory; scrollbar-width: none; }
.hero-demo-track.is-animating { scroll-snap-type: none; }
.hero-demo-track::-webkit-scrollbar { display: none; }
.hero-demo-card { min-width: 0; margin: 0; scroll-snap-align: start; }
.hero-demo-player { display: block; width: 100%; aspect-ratio: 16/9; border: 1px solid #b9cede; border-radius: 9px; background: #071b2d; box-shadow: 0 10px 24px rgba(16,42,67,.1); object-fit: cover; }
.hero-demo-arrow { position: absolute; z-index: 2; top: 50%; display: grid; width: 32px; height: 32px; padding: 0; border: 1px solid #d6dce1; border-radius: 50%; background: rgba(255,255,255,.96); color: #50565b; place-items: center; box-shadow: 0 3px 10px rgba(16,42,67,.12); cursor: pointer; transform: translateY(-50%); }
.hero-demo-arrow::before { width: 7px; height: 7px; border-top: 2px solid currentColor; border-right: 2px solid currentColor; content: ""; }
.hero-demo-arrow.previous::before { transform: translateX(2px) rotate(-135deg); }
.hero-demo-arrow.next::before { transform: translateX(-2px) rotate(45deg); }
.hero-demo-arrow:hover,.hero-demo-arrow:focus-visible { border-color: var(--green); background: var(--green); color: #fff; }
.hero-demo-arrow.previous { left: 8px; }
.hero-demo-arrow.next { right: 8px; }
.hero-demo-dots { display: flex; min-height: 20px; margin-top: 10px; align-items: center; justify-content: center; gap: 7px; }
.hero-demo-dots button { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: #b8c9d7; cursor: pointer; }
.hero-demo-dots button[aria-current="true"] { background: var(--green); transform: scale(1.2); }
.hero-abstract { width: 100%; text-align: left; }
.hero-abstract h2 { margin: 22px 0 8px; font-size: var(--section-title-size); font-weight: 700; letter-spacing: -.03em; line-height: 1.05; text-align: center; }
.abstract-figure { width: min(780px,100%); margin: 0 auto; }
.abstract-figure img { max-height: none; object-fit: contain; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.hero-abstract .abstract-copy { display: block; padding-top: 10px; padding-bottom: 16px; }
.section-head { display: block; margin-bottom: 24px; text-align: center; }
.section-head h2 { max-width: 820px; margin: 0 auto; font-size: var(--section-title-size); font-weight: 700; letter-spacing: -.03em; line-height: 1.05; }
.section-head .section-summary { max-width: 720px; margin: 14px auto 0; color: var(--muted); font-weight: 400; letter-spacing: 0; text-transform: none; }
.abstract-copy { display: block; width: min(760px,100%); margin: 0 auto; padding: 28px 0 18px; }
.abstract-copy p { margin: 0; color: #3f5b73; font-family: var(--font-body); font-size: .95rem; line-height: 1.62; }
.abstract-copy strong { color: inherit; font-weight: 400; }
.section-pad { padding-top: clamp(24px,2.6vw,34px); padding-bottom: clamp(24px,2.6vw,34px); }
.dark-section { background: var(--green-dark); color: var(--white); }
.section-head.light .section-summary { color: var(--mint); }
#method .section-head { margin-bottom: 24px; }
.method-figure { width: min(840px,100%); margin-right: auto; margin-left: auto; color: var(--ink); }
.method-figure + .method-figure { margin-top: 24px; }
.method-figure img { padding: 0; border: 0; border-radius: 0; background: transparent; filter: none; box-shadow: none; }
.method-figure figcaption { margin: 8px 0 0; color: #405b73; text-align: center; }
.method-figure figcaption strong { color: var(--ink); }
.method-figure figcaption i { color: var(--green); }
.contribution-bridge { width: min(760px,100%); margin: 20px auto; padding: 16px 18px; border: 1px solid #b9cede; border-radius: 8px; background: rgba(231,240,248,.72); }
.contribution-bridge > span { display: block; margin-bottom: 11px; color: #111; font-size: 1.2rem; font-weight: 800; letter-spacing: normal; text-align: center; }
.contribution-bridge > div { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 22px; }
.contribution-bridge p { margin: 0; color: #405b73; font-size: .95rem; line-height: 1.62; }
.contribution-bridge strong { color: var(--ink); }
.main-experiment { margin-bottom: 0; padding: 0; border: 0; border-radius: 0; background: transparent; box-shadow: none; }
.main-experiment-head { display: block; padding-bottom: 12px; border-bottom: 1px solid rgba(16,42,67,.22); text-align: left; }
.main-experiment-head > div { max-width: none; }
.main-experiment-head h3 { margin: 0; color: #111; font: 700 var(--experiment-title-size)/1.12 var(--font-body); letter-spacing: -.015em; }
.main-experiment-video-grid { margin-top: 12px; }
.experiment-condition-block { margin-top: 24px; }
.experiment-condition-block:first-child { margin-top: 0; }
.experiment-condition-head { margin: 0 4px 9px; text-align: left; }
.experiment-condition-head h4 { margin: 0; color: var(--ink); font: 700 1.4rem var(--font-body); letter-spacing: -.015em; }
.experiment-condition-head p { max-width: 800px; margin: 4px 0 0; color: #405b73; font-size: .86rem; line-height: 1.48; }
.experiment-condition-content { padding: 2px 14px 0; border: 1px solid #d2dde7; border-radius: 8px; background: rgba(255,255,255,.68); }
.experiment-task-group { padding: 11px 0; }
.experiment-task-group + .experiment-task-group { border-top: 1px solid var(--line); }
.experiment-task-group:last-child { padding-bottom: 0; }
.experiment-task-head { display: flex; margin-bottom: 9px; align-items: baseline; flex-wrap: wrap; gap: 4px 16px; }
.experiment-task-head h5 { flex-shrink: 0; margin: 0; color: var(--ink); font: 700 1.2rem var(--font-body); }
.experiment-task-prompt { min-height: 1.2em; margin: 0; color: var(--muted); font-size: .78rem; line-height: 1.4; }
.experiment-task-scroll { overflow-x: auto; padding-bottom: 4px; }
.experiment-method-grid { display: grid; min-width: 820px; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 10px; }
.experiment-video-card { background: transparent; }
.experiment-video-player { display: block; width: 100%; aspect-ratio: 16/9; border: 1px solid #b9cede; border-radius: 8px; background: #081a2a; box-shadow: 0 8px 20px rgba(16,42,67,.08); object-fit: cover; }
.experiment-video-card.ours .experiment-video-player { border-color: #4a91c2; box-shadow: 0 8px 22px rgba(37,109,168,.15); }
.experiment-video-head { display: flex; min-height: 32px; padding: 0 2px 5px; align-items: center; justify-content: center; }
.experiment-video-head strong { color: var(--ink); font-size: .94rem; text-align: center; }
.main-experiment .robot-section { margin-top: 20px; }
.robot-results-figure { width: 100%; }
.robot-results-figure .chart-scroll { overflow-x: auto; padding-bottom: 4px; }
.robot-results-figure img { padding: 8px; }
.robot-results-figure figcaption { margin-right: 4px; margin-left: 4px; }
.experiment-result-figure { width: min(920px,100%); margin: 0 auto; }
.experiment-result-figure img { display: block; width: 100%; padding: 0; border: 0; border-radius: 7px; box-shadow: none; }
.experiment-result-figure figcaption { margin: 10px 2px 0; font-size: .82rem; }
.table-section { margin-top: 24px; }
.subsection-head { display: flex; margin-bottom: 16px; align-items: end; justify-content: space-between; }
.subsection-head h3 { margin: 4px 0 0; font: 600 clamp(2rem,3.5vw,3.5rem)/1.08 var(--font-body); letter-spacing: -.035em; }
.table-section .subsection-head { position: relative; display: grid; grid-template-columns: 1fr; text-align: center; }
.table-section .subsection-head h3 { font-size: clamp(1.2rem,1.8vw,1.55rem); font-weight: 700; letter-spacing: .01em; }
.table-section .subsection-head > span { position: absolute; right: 0; bottom: 2px; }
.subsection-head > span { color: var(--muted); font-size: .68rem; }
.chart-note { max-width: 920px; margin: 14px 2px 0; color: var(--muted); }
.chart-note strong { color: var(--ink); }
.supporting-experiment { margin-top: 28px; padding-top: 0; }
.supporting-head { max-width: none; margin: 0 auto 16px; padding-bottom: 10px; border-bottom: 1px solid var(--ink); }
.supporting-head h3 { text-align: center; }
.supporting-head h3 { margin: 0; color: var(--green-dark); font: 700 var(--experiment-title-size)/1.12 var(--font-body); letter-spacing: -.015em; }
.supporting-head > p:last-child { margin: 0; color: var(--muted); font-size: .95rem; line-height: 1.65; }
.generalization-experiment > .supporting-head { margin-bottom: 12px; padding-bottom: 0; border-bottom: 0; }
.generalization-experiment > .supporting-head h3 { color: #111; font-size: var(--experiment-title-size); font-weight: 700; text-align: left; }
.generalization-analysis { width: min(760px,100%); margin: 0 0 16px; text-align: left; }
.generalization-overview { margin: 0 0 24px; }
.generalization-overview-player { display: block; width: 100%; aspect-ratio: 2/1; object-fit: contain; border: 1px solid #b9cede; border-radius: 8px; background: #081a2a; }
.analysis-figure { min-width: 0; margin: 0; }
.analysis-figure figcaption { margin: 12px 0 0; font-size: .88rem; }
.citation-block { border: 1px solid var(--ink); background: var(--white); }
.citation-block > div { display: flex; min-height: 40px; padding: 0 14px; border-bottom: 1px solid var(--ink); align-items: center; justify-content: space-between; font: .66rem var(--font-body); }
.citation-status { color: var(--muted); text-transform: uppercase; }
.citation-block button { border: 0; background: transparent; color: var(--green); font-size: .7rem; font-weight: 700; cursor: pointer; }
.citation-block pre { overflow-x: auto; margin: 0; padding: 18px; color: var(--muted); font: .8rem/1.55 Consolas,monospace; }
.citation-note { margin: 14px 0 0; color: var(--muted); font-size: .82rem; }
.site-footer { padding: 34px 0; border-top: 1px solid var(--ink); color: var(--muted); font-size: .72rem; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: end; }
.footer-grid span { color: var(--ink); font-size: .68rem; font-weight: 700; text-transform: uppercase; }
.footer-grid p { margin: 6px 0 0; }
.footer-grid > a { color: var(--ink); }
.section-head .section-summary,
.supporting-head > p:last-child,
.chart-note,
.citation-note { font-family: var(--font-body); font-size: .92rem; line-height: 1.55; }
:focus-visible { outline: 2px solid var(--orange); outline-offset: 4px; }
@media (max-width: 980px) { .hero-demo-track { grid-auto-columns: calc((100% - 12px)/2); } .footer-grid { grid-template-columns: 1fr 1fr; } .footer-grid > a { grid-column: 1/-1; } }
@media (max-width: 680px) { .shell { width: min(var(--max),calc(100% - 32px)); } .hero { --hero-gutter: 32px; padding: 0 0 12px; gap: 28px; } .hero-copy { padding-top: 46px; } .hero-paper-title { font-size: clamp(1.35rem,6vw,1.72rem); } .hero-demo-viewport { padding: 0 18px; } .hero-demo-track { grid-auto-columns: 88%; } .hero-demo-arrow { width: 28px; height: 28px; top: 50%; } .hero-demo-arrow::before { width: 6px; height: 6px; border-width: 2px; } .hero-demo-arrow.previous { left: 4px; } .hero-demo-arrow.next { right: 4px; } .robot-results-figure img { min-width: 700px; } .experiment-condition-content { padding-right: 14px; padding-left: 14px; } .experiment-condition-tabs { grid-template-columns: 1fr; } .experiment-condition-tabs button { border-right: 0; border-bottom: 1px solid var(--line); } .experiment-condition-tabs button:last-child { border-bottom: 0; } .experiment-task-group { padding: 12px 0; } .paper-figure figcaption { flex-direction: column; gap: 4px; } .subsection-head { align-items: flex-start; flex-direction: column; gap: 10px; } .contribution-bridge > div { grid-template-columns: 1fr; gap: 10px; } .footer-grid { grid-template-columns: 1fr; } .footer-grid > a { grid-column: auto; } }
@media (max-width: 440px) { .citation-block pre { padding: 20px 16px; } }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

.paper-identity { width: 100%; margin-top: 16px; }
.authors { display: flex; justify-content: center; flex-wrap: wrap; gap: 6px 20px; margin: 0 0 10px; color: #165580; font-size: 1.05rem; font-weight: 600; }
.authors span { white-space: nowrap; }
.authors sup, .affiliations sup { margin-left: 2px; font-size: .65em; }
.affiliations { color: #405369; font-size: .74rem; line-height: 1.6; }
.affiliations p { margin: 2px 0; }
.corresponding-author { margin: 6px 0 0; color: var(--muted); font-size: .72rem; }
.institution-logos { display: flex; justify-content: center; align-items: center; flex-wrap: wrap; gap: 16px 28px; margin-top: 14px; }
.institution-logos a { display: flex; align-items: center; gap: 8px; }
.institution-logos span { color: var(--ink); font-size: .63rem; font-weight: 600; line-height: 1.4; text-align: left; }
.institution-symbol { width: 46px; height: 46px; object-fit: contain; }
.cebsit-symbol { object-fit: cover; object-position: right; }
.ucas-logo { width: 206px; height: auto; }
.resource-row { margin-top: 10px; }
.main-experiment > .video-speed-note { margin: 20px 0 12px; text-align: left; }
.generalization-analysis { width: 100%; color: #3f5b73; font-size: .95rem; line-height: 1.62; }
@media (max-width: 680px) {
  .hero-copy { padding-top: 24px; }
  .authors { gap: 8px 16px; font-size: 1rem; }
  .affiliations { font-size: .74rem; }
  .institution-logos { gap: 14px; }
  .institution-logos span { max-width: 140px; }
  .abstract-figure img { max-height: none; }
}