@font-face { font-family: Inter; font-style: normal; font-weight: 400 600; font-display: swap; src: url('assets/fonts/inter-regular.woff2') format('woff2'); }
:root { color-scheme: light; --ink: #1c2a36; --muted: #646962; --accent: #984f2b; --accent-pale: #f2e6dc; --line: #deded7; --paper: #f7f6f2; font-family: Inter, Arial, sans-serif; color: var(--ink); background: var(--paper); font-synthesis: none; -webkit-font-smoothing: antialiased; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; scroll-padding-top: 76px; }
body { margin: 0; font-size: 20px; line-height: 1.65; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; cursor: pointer; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, summary:focus-visible, video:focus-visible { outline: 2px solid var(--accent); outline-offset: 5px; }
p, h1, h2, h3, figure { margin: 0; }
img, video { display: block; width: 100%; height: auto; }
video { background: var(--ink); }
sup { margin-left: 3px; font-size: .62em; line-height: 0; vertical-align: super; color: var(--accent); }
strong { font-weight: 600; }
::selection { background: var(--accent-pale); }
.container { width: min(1120px, calc(100% - 80px)); margin-inline: auto; }
.section { padding-block: 88px; }
h2 { max-width: 920px; font-size: clamp(32px, 3.6vw, 45px); font-weight: 500; line-height: 1.18; letter-spacing: -.045em; text-wrap: balance; }
h3 { font-size: 22px; font-weight: 500; line-height: 1.4; }
.section-lead { max-width: 900px; margin: 25px 0 40px; color: var(--muted); font-size: 21px; line-height: 1.7; text-wrap: pretty; }
.section-caption, figcaption { color: var(--muted); font-size: 17px; line-height: 1.65; text-wrap: pretty; }
figcaption { margin-top: 20px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; top: -100px; left: 20px; padding: 10px 20px; background: var(--ink); color: white; }
.skip-link:focus { top: 10px; }
.site-header { border-bottom: 1px solid var(--line); }
.nav-shell { display: flex; align-items: center; justify-content: space-between; min-height: 62px; width: min(1320px, calc(100% - 80px)); margin-inline: auto; }
.wordmark { font-size: 17px; font-weight: 600; letter-spacing: -.02em; }
.wordmark span { margin-inline: 8px; color: var(--accent); }
.site-header nav { display: flex; gap: 32px; font-size: 16px; color: var(--muted); }
.site-header nav a:hover { color: var(--accent); }
.hero { padding-top: 47px; text-align: center; }
h1 { max-width: 1060px; margin-inline: auto; font-family: Georgia, 'Times New Roman', serif; font-weight: 400; font-size: clamp(38px, 4.3vw, 58px); line-height: 1.13; letter-spacing: -.04em; text-wrap: balance; }
h1 > span { color: var(--accent); }
.authors { display: grid; grid-template-columns: repeat(4, 1fr); gap: 9px 22px; max-width: 940px; margin: 26px auto 16px; font-size: 18px; }
.authors > span { white-space: nowrap; }
.affiliation-logos { display: flex; align-items: center; justify-content: center; gap: clamp(12px, 2vw, 22px); max-width: 520px; margin: 14px auto 0; }
.affiliation-logo { display: flex; align-items: center; justify-content: center; flex: 0 0 62px; height: 62px; overflow: hidden; }
.affiliation-logo img { flex-shrink: 0; width: 60px; height: 60px; object-fit: contain; mix-blend-mode: multiply; }
.logo-teleai img { width: 54px; height: 54px; }
.logo-zju img { width: 98px; height: 78px; }
.logo-gamma { flex-basis: 144px; }
.logo-gamma img { width: 144px; }
.affiliations { display: flex; flex-wrap: wrap; justify-content: center; gap: 3px 25px; color: var(--muted); font-size: 16px; line-height: 1.6; }
.affiliations sup { margin: 0 5px 0 0; }
.affiliations > span:first-child { flex-basis: 100%; }
.contributions { margin-top: 9px; color: var(--muted); font-size: 14px; }
.contributions > span { margin-inline: 10px; }
.resource-links { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 21px 0 32px; }
.resource-link { display: inline-flex; align-items: center; gap: 8px; padding: 9px 20px; border: 1px solid #d5d5ce; border-radius: 4px; background: transparent; color: #626660; font-size: 16px; line-height: 1.5; }
.resource-link svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linejoin: round; }
.resource-link[aria-disabled='true'] { cursor: default; }
.project-video { text-align: left; }
.video-frame { position: relative; overflow: hidden; border-radius: 6px; background: var(--ink); box-shadow: 0 18px 48px -28px rgb(28 42 54 / 30%); }
#overview-video { aspect-ratio: 16 / 9; }
.video-cover { position: absolute; inset: 0; height: 100%; object-fit: cover; }
.video-play { position: absolute; top: 50%; left: 50%; display: grid; place-items: center; width: 76px; height: 76px; padding: 0; transform: translate(-50%, -50%); border: 1px solid rgb(255 255 255 / 65%); border-radius: 50%; background: rgb(28 42 54 / 90%); color: #fff; box-shadow: 0 8px 26px rgb(0 0 0 / 18%); }
.video-play:hover { background: var(--accent); }
.video-play svg { width: 30px; height: 30px; fill: currentColor; margin-left: 4px; }
.video-chapters summary { padding: 20px 0; font-size: 16px; }
.video-label { display: flex; align-items: center; gap: 18px; font-size: 17px; color: var(--ink); }
.video-label > span { color: var(--muted); font-size: 15px; font-weight: 400; }
.chapter-toggle { display: flex; align-items: center; gap: 13px; color: var(--muted); font-size: 15px; }
.chapter-toggle > span { color: var(--accent); font-size: 22px; line-height: 1; }
.video-chapters[open] .chapter-toggle > span { transform: rotate(45deg); }
.chapters { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; padding-bottom: 24px; }
.chapters button { display: grid; gap: 6px; padding: 12px 0; text-align: left; background: transparent; border: 0; border-top: 1px solid var(--line); font-size: 16px; line-height: 1.45; }
.chapters button > span { font-size: 15px; color: var(--accent); font-variant-numeric: tabular-nums; }
.chapters button:hover, .chapters button.active { border-color: var(--accent); color: var(--accent); }
.hero-summary { max-width: 820px; margin: 54px auto 68px; font-family: Georgia, 'Times New Roman', serif; font-size: 30px; line-height: 1.5; letter-spacing: -.018em; text-wrap: balance; }
.section-band { background: #fff; }
#gap, #method { border-top: 1px solid var(--line); }
.gap-figure { margin-block: 40px 28px; }
.gap-insight { max-width: 920px; font-size: 24px; line-height: 1.6; letter-spacing: -.015em; }
.method-figure { margin: 48px 0 34px; }
.method-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin: 0 0 25px; padding: 23px 0 0; list-style: none; border-top: 1px solid var(--line); font-size: 17px; }
.method-steps li { display: flex; align-items: center; gap: 14px; }
.method-steps span { color: var(--accent); font-size: 17px; }
.result-heading { max-width: 920px; font-size: 32px; line-height: 1.25; letter-spacing: -.03em; text-wrap: balance; }
.tracking-showcase video { aspect-ratio: 16 / 9; border-radius: 4px; }
.tracking-showcase figcaption { text-align: left; }
.hardware-figure { margin-top: 35px; }
.hardware-figure img { max-width: 900px; margin-inline: auto; }
.hardware-figure figcaption { text-align: center; }
.benchmark { max-width: 960px; margin: 60px auto 0; }
.benchmark h3 { font-size: 25px; letter-spacing: -.02em; }
.legend { display: flex; flex-wrap: wrap; gap: 26px; margin: 17px 0 32px; font-size: 17px; color: var(--muted); }
.legend span { display: flex; gap: 10px; align-items: center; }
.legend i { width: 23px; height: 9px; }
.nominal-swatch, .bar.nominal { background: #9b9e9d; }
.optimized-swatch, .bar.optimized { background: var(--accent); }
.benchmark-row { display: grid; grid-template-columns: 90px 1fr; align-items: center; gap: 15px; margin-top: 28px; padding-right: 40px; }
.benchmark-row > strong { font-size: 18px; font-weight: 500; }
.bar-pair { display: grid; gap: 10px; }
.bar-track { display: flex; align-items: center; gap: 12px; height: 22px; }
.bar-track > span:last-child { font-size: 17px; font-variant-numeric: tabular-nums; line-height: 1; }
.bar { display: block; height: 12px; flex-shrink: 0; }
.chart-axis { display: flex; justify-content: space-between; margin: 24px 40px 20px 105px; padding-top: 8px; border-top: 1px solid var(--line); font-size: 15px; color: var(--muted); }
.data-details { margin: 38px auto 0; border-block: 1px solid var(--line); }
summary { display: flex; justify-content: space-between; gap: 20px; align-items: center; padding: 22px 0; font-size: 18px; cursor: pointer; list-style: none; }
summary::-webkit-details-marker { display: none; }
.data-details summary > span { color: var(--accent); font-size: 24px; }
.data-details[open] summary > span { transform: rotate(45deg); }
.details-body { padding-bottom: 25px; }
.details-body > p { color: var(--muted); font-size: 18px; margin-bottom: 20px; }
.details-body > p:last-child { margin-bottom: 0; }
.table-scroll { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-size: 17px; font-variant-numeric: tabular-nums; }
caption { text-align: left; font-size: 16px; color: var(--muted); padding-bottom: 15px; }
th, td { padding: 15px 16px; text-align: right; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-weight: 500; }
tr > :first-child { text-align: left; padding-left: 0; }
thead { color: var(--muted); font-size: 16px; }
#compute { border-block: 1px solid var(--line); }
.compute-figure { max-width: 890px; margin: 48px auto 42px; }
.compute-numbers { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; max-width: 890px; margin-inline: auto; padding-block: 29px 0; border-top: 1px solid var(--line); }
.compute-numbers > div { display: flex; align-items: center; gap: 23px; }
.compute-numbers strong { flex-shrink: 0; font-family: Georgia, 'Times New Roman', serif; font-size: 52px; font-weight: 400; line-height: 1.2; color: var(--accent); letter-spacing: -.04em; }
.compute-numbers strong > span { font-size: 30px; }
.compute-numbers p { max-width: 190px; font-size: 18px; color: var(--muted); line-height: 1.55; }
.demo-controls { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; margin-block: 34px 25px; }
.task-picker, .model-picker { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; }
.task-picker { width: 100%; border-bottom: 1px solid var(--line); }
.task-picker button { padding: 12px 17px 15px; border: 0; border-bottom: 2px solid transparent; background: transparent; font-size: 17px; line-height: 1.5; color: var(--muted); }
.task-picker button:first-child { padding-left: 0; }
.task-picker button:hover, .task-picker button[aria-pressed='true'] { border-bottom-color: var(--accent); color: var(--accent); }
.model-picker button { padding: 7px 18px; border: 1px solid var(--line); border-radius: 4px; background: transparent; font-size: 16px; line-height: 1.5; }
.model-picker button:hover { border-color: var(--accent); }
.model-picker button[aria-pressed='true'] { background: var(--ink); border-color: var(--ink); color: #fff; }
.model-picker > span { color: var(--muted); font-size: 17px; margin-right: 10px; }
.demo-context { color: var(--muted); font-size: 17px; margin-bottom: 25px; }
.comparison-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 21px; }
.comparison { min-width: 0; }
.comparison h3 { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: 18px; padding: 0 0 14px; text-align: left; }
.comparison-ours h3 { color: var(--accent); }
.comparison h3 > span { font-size: 14px; padding: 1px 7px; background: var(--accent-pale); border-radius: 3px; }
.comparison video, .missing-clip { aspect-ratio: 16 / 9; border-radius: 4px; }
.missing-clip { display: flex; flex-direction: column; justify-content: center; align-items: center; gap: 10px; padding: 20px; background: #ebeae5; color: var(--muted); text-align: center; font-size: 17px; }
.missing-clip > span { font-size: 15px; }
.demo-playback { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; margin-top: 26px; }
.demo-playback button { display: flex; align-items: center; gap: 10px; padding: 9px 0; background: transparent; border: 0; color: var(--accent); font-size: 18px; }
.demo-playback p { font-size: 16px; color: var(--muted); }
.ours-cell { background: var(--accent-pale); color: var(--accent); font-weight: 600; }
tr[data-result-task].selected { background: #efeee8; }
.mean-row { font-weight: 600; }
.real-results .details-body > p:last-child { margin-top: 20px; }
.site-footer { padding-block: 29px; border-top: 1px solid var(--line); }
.site-footer > div { display: flex; justify-content: space-between; align-items: center; gap: 28px; color: var(--muted); font-size: 15px; }
.site-footer a { flex-shrink: 0; color: var(--accent); }
@media (max-width: 1000px) {
  .container, .nav-shell { width: calc(100% - 48px); }
  .section { padding-block: 65px; }
  h1 { font-size: 48px; }
  .desktop-break { display: none; }
  .authors { font-size: 17px; gap: 9px 15px; }
  .hero { padding-top: 40px; }
  .method-steps { font-size: 16px; gap: 14px; }
  .method-steps li { gap: 10px; }
  .compute-numbers { gap: 32px; }
  .compute-numbers > div { gap: 18px; }
  .comparison-grid { gap: 16px; }
  .comparison h3 { font-size: 16px; min-height: 52px; align-items: flex-start; }
}
@media (max-width: 600px) {
  body { font-size: 18px; }
  .container, .nav-shell { width: calc(100% - 36px); }
  .nav-shell { min-height: 56px; }
  .wordmark { font-size: 15px; }
  .wordmark span { margin-inline: 4px; }
  .site-header nav { gap: 22px; font-size: 15px; }
  .site-header nav a[href="#method"], .site-header nav a[href="#results"] { display: none; }
  .hero { padding-top: 31px; }
  h1 { font-size: clamp(33px, 8vw, 45px); line-height: 1.13; letter-spacing: -.035em; }
  .authors { grid-template-columns: 1fr 1fr; margin: 23px auto 15px; font-size: 16px; gap: 7px 13px; }
  .affiliation-logos { gap: 8px; margin-top: 12px; }
  .affiliation-logo { flex-basis: 48px; height: 48px; }
  .affiliation-logo img { width: 48px; height: 48px; }
  .logo-teleai img { width: 42px; height: 42px; }
  .logo-zju img { width: 76px; height: 60px; }
  .logo-gamma { flex-basis: 84px; }
  .logo-gamma img { width: 84px; height: 48px; }
  .affiliations { font-size: 14px; gap: 6px 14px; line-height: 1.6; }
  .contributions { font-size: 13px; margin-top: 12px; }
  .contributions > span { margin-inline: 6px; }
  .resource-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 7px; max-width: 300px; margin: 21px auto 27px; }
  .resource-link { justify-content: center; padding: 8px 5px; gap: 5px; font-size: 14px; }
  .resource-link svg { width: 15px; height: 15px; }
  .video-frame { border-radius: 4px; }
  .video-play { width: 54px; height: 54px; }
  .video-play svg { width: 25px; height: 25px; }
  .video-chapters summary { gap: 10px; padding-block: 15px; }
  .video-label { align-items: flex-start; flex-direction: column; gap: 2px; font-size: 16px; }
  .video-label > span { font-size: 13px; }
  .chapter-toggle { gap: 8px; font-size: 14px; }
  .chapters { grid-template-columns: 1fr 1fr; gap: 9px 18px; padding-bottom: 15px; }
  .chapters button { font-size: 15px; }
  .chapters button > span { font-size: 14px; }
  .hero-summary { margin-block: 32px 45px; font-size: 25px; line-height: 1.5; }
  .section { padding-block: 50px; }
  h2 { font-size: 32px; line-height: 1.2; }
  .section-lead { font-size: 18px; margin-block: 21px 30px; line-height: 1.65; }
  .gap-figure { margin-block: 30px 24px; }
  .gap-insight { font-size: 21px; }
  .method-figure { margin-block: 33px 26px; }
  .method-steps { grid-template-columns: 1fr 1fr; font-size: 15px; gap: 16px 12px; }
  .method-steps li { gap: 9px; }
  .method-steps span { font-size: 15px; }
  .section-caption, figcaption { font-size: 15px; }
  .tracking-showcase figcaption br { display: none; }
  .result-heading { font-size: 26px; }
  .benchmark { margin-top: 38px; }
  .benchmark h3 { font-size: 22px; }
  .legend { gap: 14px; font-size: 14px; margin-bottom: 24px; }
  .legend span { gap: 7px; }
  .legend i { width: 18px; height: 8px; }
  .benchmark-row { grid-template-columns: 65px 1fr; gap: 8px; padding-right: 31px; margin-top: 24px; }
  .benchmark-row > strong { font-size: 15px; }
  .bar-track { gap: 7px; }
  .bar-track > span:last-child { font-size: 14px; }
  .bar { height: 10px; }
  .chart-axis { margin: 20px 31px 17px 73px; font-size: 12px; }
  .data-details { margin-top: 27px; }
  summary { font-size: 17px; padding-block: 18px; }
  .details-body > p { font-size: 17px; }
  table { font-size: 15px; }
  th, td { padding: 13px; }
  thead, caption { font-size: 14px; }
  .compute-figure { margin-block: 35px 30px; }
  .compute-numbers { gap: 28px; padding-top: 23px; }
  .compute-numbers > div { display: block; }
  .compute-numbers strong { font-size: 43px; }
  .compute-numbers strong > span { font-size: 25px; }
  .compute-numbers p { margin-top: 8px; font-size: 15px; }
  .task-picker { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
  .task-picker button { padding: 10px 0 12px; font-size: 15px; text-align: left; }
  .model-picker { gap: 8px; }
  .model-picker button { padding: 6px 13px; font-size: 15px; }
  .model-picker > span { font-size: 15px; margin-right: 7px; }
  .demo-context { font-size: 16px; }
  .comparison-grid { grid-template-columns: 1fr; gap: 28px; }
  .comparison h3 { font-size: 18px; min-height: auto; align-items: center; padding-bottom: 11px; }
  .demo-playback { gap: 10px; margin-top: 18px; }
  .demo-playback button { font-size: 17px; }
  .demo-playback p { font-size: 14px; }
  .site-footer > div { flex-direction: column; align-items: flex-start; gap: 16px; font-size: 14px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}