:root {
  --ink: #141827;
  --muted: #667085;
  --line: #e6e9ef;
  --soft: #f6f8fb;
  --blue: #2368c4;
  --blue-dark: #174a95;
  --cyan: #37b7d6;
  --violet: #7b6de5;
  --green: #2da575;
  --orange: #e7894c;
  --max: 1180px;
  --radius: 22px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-dark); }
img { display: block; max-width: 100%; height: auto; }
button { font: inherit; }
.section-shell { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid rgba(226, 230, 237, .86);
  background: rgba(255, 255, 255, .88);
  backdrop-filter: blur(14px);
}
.nav-shell {
  width: min(1240px, calc(100% - 40px));
  height: 66px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand { min-width: 0; display: inline-flex; align-items: center; gap: 12px; color: var(--ink); font-weight: 760; letter-spacing: -.02em; }
.brand-project, .brand-partners { min-width: 0; display: inline-flex; flex: 0 0 auto; align-items: center; }
.brand-project { gap: 10px; }
.brand-name { white-space: nowrap; }
.brand-puffin { width: 38px; height: 38px; flex: 0 0 auto; object-fit: contain; }
.brand-affiliation-divider, .brand-partner-divider { width: 1px; flex: 0 0 auto; background: #d9dee8; }
.brand-affiliation-divider { height: 26px; }
.brand-partners { gap: 10px; }
.brand-partners img { width: auto; max-width: none; object-fit: contain; }
.brand-mmlab { height: 23px; }
.brand-ntu { height: 24px; }
.brand-ace { height: 20px; }
.brand-partner-divider { height: 18px; }
.nav-links { display: flex; align-items: center; gap: 26px; margin-left: auto; }
.nav-links a { color: #3f4654; font-size: 14px; font-weight: 600; }
.nav-links a:hover { color: var(--blue); }
.nav-paper { padding: 8px 15px; border-radius: 999px; color: white; background: var(--ink); font-size: 14px; font-weight: 700; }
.nav-paper:hover { color: #fff; background: var(--blue); }

.hero { padding: 78px 0 66px; text-align: center; }
.hero-logo { width: 118px; height: 118px; object-fit: contain; margin: 0 auto 8px; }
.eyebrow, .section-kicker { margin: 0 0 8px; color: var(--blue); font-size: 13px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
h1 { margin: 0; font-size: clamp(52px, 8vw, 86px); line-height: .98; letter-spacing: -.065em; }
.subtitle { margin: 18px auto 25px; max-width: 850px; font-size: clamp(24px, 3.5vw, 41px); line-height: 1.18; font-weight: 620; letter-spacing: -.035em; }
.authors { max-width: 1020px; margin: 0 auto; color: #343946; font-size: 16px; line-height: 1.8; }
.authors span, .authors a { white-space: nowrap; }
.authors sup, .affiliations sup { margin-left: 2px; color: var(--blue); font-size: .72em; }
.affiliations { max-width: 1000px; margin: 10px auto 0; color: var(--muted); font-size: 14px; line-height: 1.7; }
.affiliations span { display: inline-block; margin: 0 8px; }
.venue { margin: 10px 0 0; font-weight: 700; }
.hero-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 28px; }
.pill { display: inline-flex; min-height: 44px; align-items: center; gap: 8px; padding: 9px 17px; border: 1px solid #d9dee8; border-radius: 999px; color: var(--ink); background: #fff; font-size: 14px; font-weight: 720; box-shadow: 0 3px 10px rgba(32, 43, 64, .04); }
.pill:hover { color: var(--blue); border-color: #b4ccef; transform: translateY(-1px); }
.pill.primary { color: #fff; border-color: var(--ink); background: var(--ink); }
.pill.primary:hover { color: #fff; border-color: var(--blue); background: var(--blue); }
.pill.muted { color: #8b92a1; background: #f7f8fa; box-shadow: none; cursor: default; }
.pill-icon { font-size: 16px; }
.pill-dataset-icon { width: 24px; height: 24px; flex: 0 0 auto; overflow: visible; filter: drop-shadow(0 1px 2px rgba(28, 42, 68, .12)); }

.teaser-section { padding-bottom: 105px; }
.paper-figure { margin: 0; }
.hero-figure { overflow: hidden; border: 1px solid var(--line); border-radius: 24px; background: #fff; box-shadow: 0 22px 60px rgba(28, 42, 68, .09); }
.hero-figure img { width: 100%; }
.teaser-stack { padding: clamp(8px, 1.5vw, 17px); }
.teaser-stack img { border-radius: 12px; }
.teaser-stack img + img { margin-top: 10px; }
.lead-copy { max-width: 900px; margin: 72px auto 42px; text-align: center; }
.lead-copy h2, .section-heading h2, .compact-heading h2 { margin: 0; font-size: clamp(34px, 4.6vw, 53px); line-height: 1.12; letter-spacing: -.045em; }
.lead-copy > p:last-child { margin: 22px auto 0; max-width: 830px; color: #555e6e; font-size: 19px; }
.overview-figure { margin: 0 0 42px; overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 16px 48px rgba(24, 39, 67, .07); }
.overview-figure img { width: 100%; height: auto; }
.overview-figure figcaption { border-top: 1px solid var(--line); }
.state-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.state-card { position: relative; min-height: 264px; padding: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; }
.state-card::before { content: ""; position: absolute; inset: auto -35px -50px auto; width: 160px; height: 160px; border-radius: 50%; opacity: .12; }
.physics-card::before { background: var(--green); }
.geometry-card::before { background: var(--blue); }
.appearance-card::before { background: var(--violet); }
.state-symbol { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 13px; background: var(--soft); font-size: 25px; }
.state-number { margin: 22px 0 4px; color: var(--muted); font-size: 12px; font-weight: 800; letter-spacing: .12em; text-transform: uppercase; }
.state-card h3 { margin: 0; font-size: 23px; letter-spacing: -.025em; }
.state-card p:last-child { margin: 10px 0 0; color: var(--muted); font-size: 15px; line-height: 1.6; }

.world-section { padding: 104px 0 90px; color: #f6f8fc; background: #0d1220; }
.section-heading { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr); align-items: end; gap: 70px; margin-bottom: 44px; }
.section-heading > p { margin: 0 0 5px; color: var(--muted); }
.light-heading .section-kicker { color: #75c9ff; }
.light-heading h2 { color: #fff; }
.light-heading > p { color: #9ba8bd; }
.world-app { display: grid; grid-template-columns: 248px minmax(0, 1fr); min-height: 720px; overflow: hidden; border: 1px solid #283147; border-radius: 26px; background: #111827; box-shadow: 0 32px 80px rgba(0,0,0,.32); }
.world-sidebar { display: flex; flex-direction: column; padding: 24px 16px 20px; border-right: 1px solid #2a3245; background: #121a2b; }
.control-label { margin: 0 0 12px; color: #7f8ca4; font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; }
.scene-list { min-height: 0; display: grid; gap: 8px; overflow-y: auto; padding-right: 4px; scrollbar-color: #34425b transparent; scrollbar-width: thin; }
.scene-list::-webkit-scrollbar { width: 5px; }
.scene-list::-webkit-scrollbar-thumb { border-radius: 999px; background: #34425b; }
.scene-button { width: 100%; display: flex; align-items: center; gap: 11px; min-width: 0; padding: 8px; border: 1px solid transparent; border-radius: 14px; color: #dce4f2; background: transparent; text-align: left; cursor: pointer; transition: border-color .18s ease, background .18s ease, transform .18s ease; }
.scene-button:hover { background: #182238; transform: translateX(2px); }
.scene-button.active { border-color: #3a75ad; background: linear-gradient(135deg, #1c2d46, #18243a); }
.scene-thumb { position: relative; width: 52px; height: 52px; flex: 0 0 auto; overflow: hidden; border-radius: 10px; background: #24334d; }
.scene-thumb img { width: 100%; height: 100%; display: block; object-fit: cover; }
.scene-thumb::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 45%, rgba(5,10,18,.7)); }
.scene-thumb b { position: absolute; left: 6px; bottom: 4px; z-index: 1; color: #fff; font-size: 9px; letter-spacing: .08em; }
.scene-button strong, .scene-button small { display: block; }
.scene-button strong { font-size: 14px; }
.scene-button small { margin-top: 1px; color: #7f8ca4; font-size: 11px; }
.explorer-main { min-width: 0; padding: 14px; background: #0d1422; }
.world-stage-grid { min-width: 0; display: grid; grid-template-columns: minmax(320px, 340px) minmax(0, 1fr); gap: 12px; align-items: start; }
.world-state-stack { min-width: 0; display: grid; grid-template-rows: repeat(4, auto); gap: 10px; }
.world-state-card { min-width: 0; display: grid; grid-template-columns: minmax(160px, 1fr) 132px; align-items: center; gap: 10px; padding: 7px; overflow: hidden; border: 1px solid #29364d; border-radius: 15px; background: linear-gradient(135deg, #151f31, #111927); }
.world-state-card video { width: 100%; aspect-ratio: 1; display: block; border-radius: 10px; object-fit: cover; background: #070b12; }
.world-state-card > div { min-width: 0; }
.world-state-card strong, .world-state-card small { display: block; }
.world-state-card strong { color: #e2e9f4; font-size: 11px; line-height: 1.35; }
.world-state-card small { margin-top: 5px; color: #728097; font-size: 9px; line-height: 1.45; }
.state-dot { width: 8px; height: 8px; display: block; margin-bottom: 9px; border-radius: 50%; background: #75c9ff; box-shadow: 0 0 11px rgba(117,201,255,.72); }
.appearance-state .state-dot { background: #ef9662; box-shadow: 0 0 11px rgba(239,150,98,.72); }
.gravity-state .state-dot { background: #58d793; box-shadow: 0 0 11px rgba(88,215,147,.72); }
.latitude-state .state-dot { background: #d38be9; box-shadow: 0 0 11px rgba(211,139,233,.72); }
.geometry-state .state-dot { background: #4b9eff; box-shadow: 0 0 11px rgba(75,158,255,.72); }
.reconstruction-panel { min-width: 0; align-self: start; display: grid; grid-template-rows: auto minmax(0, 1fr) auto; overflow: hidden; border: 1px solid #29364d; border-radius: 18px; background: #101827; }
.reconstruction-heading { min-height: 62px; display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 11px 16px; border-bottom: 1px solid #293247; background: #121c2d; }
.reconstruction-heading > div { display: grid; grid-template-columns: 10px minmax(0, 1fr); column-gap: 9px; align-items: center; }
.reconstruction-heading .state-dot { grid-row: 1 / 3; margin: 0; }
.reconstruction-heading strong, .reconstruction-heading small { display: block; }
.reconstruction-heading strong { color: #e5edf8; font-size: 13px; }
.reconstruction-heading small { margin-top: 2px; color: #748299; font-size: 9px; }
#point-count-label { flex: 0 0 auto; padding: 5px 8px; border: 1px solid #34415a; border-radius: 999px; color: #8f9db2; font-size: 9px; letter-spacing: .04em; }
.canvas-panel { position: relative; min-width: 0; min-height: 560px; overflow: hidden; background: #fff; }
#point-cloud { position: absolute; inset: 0; width: 100%; height: 100%; }
#point-cloud { display: block; cursor: grab; touch-action: none; }
#point-cloud:active { cursor: grabbing; }
#point-cloud:focus-visible { outline: 2px solid #64b9ff; outline-offset: -4px; }
.viewer-loading { position: absolute; inset: 0; z-index: 4; display: grid; place-content: center; gap: 10px; color: #4b5b70; background: rgba(255,255,255,.94); font-size: 11px; font-weight: 700; letter-spacing: .08em; text-align: center; text-transform: uppercase; transition: opacity .24s ease; }
.viewer-loading.is-hidden { opacity: 0; pointer-events: none; }
.viewer-loading div { width: min(220px, 48vw); height: 3px; overflow: hidden; border-radius: 999px; background: #dce3ec; }
.viewer-loading i { width: 0; height: 100%; display: block; border-radius: inherit; background: linear-gradient(90deg, #4b9eff, #70d2f4); transition: width .15s ease; }
.canvas-topbar { position: absolute; top: 18px; left: 20px; right: 20px; display: flex; justify-content: space-between; align-items: center; pointer-events: none; }
.live-dot { color: #53647a; font-size: 11px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
.live-dot i { width: 7px; height: 7px; display: inline-block; margin-right: 7px; border-radius: 50%; background: #55cc90; box-shadow: 0 0 12px #55cc90; }
#reset-view { padding: 7px 11px; border: 1px solid #c8d1dd; border-radius: 9px; color: #45566d; background: rgba(255,255,255,.86); font-size: 11px; cursor: pointer; pointer-events: auto; box-shadow: 0 4px 14px rgba(35,50,72,.08); }
#reset-view:hover { color: #17243a; border-color: #8fa0b5; }
.gesture-hint { position: absolute; left: 50%; bottom: 18px; transform: translateX(-50%); margin: 0; padding: 7px 12px; border: 1px solid rgba(185, 196, 210, .88); border-radius: 999px; color: #718097; background: rgba(255,255,255,.82); font-size: 10px; white-space: nowrap; backdrop-filter: blur(5px); pointer-events: none; box-shadow: 0 4px 14px rgba(35,50,72,.07); }
.gesture-hint span { color: #34455d; }
.axis-widget { position: absolute; right: 26px; bottom: 26px; width: 68px; height: 68px; opacity: .82; pointer-events: none; }
.axis-widget::before, .axis-widget::after { content: ""; position: absolute; left: 33px; bottom: 18px; width: 28px; height: 1px; background: #65778f; transform-origin: left center; }
.axis-widget::after { transform: rotate(-140deg); }
.axis-widget .axis-y { position: absolute; left: 31px; bottom: 18px; width: 1px; height: 42px; color: #76c99f; border-left: 1px solid currentColor; font-size: 9px; padding: 0 0 0 4px; }
.axis-x, .axis-z { position: absolute; color: #8ec8ff; font-size: 9px; }
.axis-x { right: 0; bottom: 10px; }
.axis-z { left: 2px; bottom: 0; color: #d795bf; }
.world-state-caption { min-height: 46px; margin: 0; padding: 13px 16px 14px; border-top: 1px solid #263047; color: #77869d; background: #101827; font-size: 10px; line-height: 1.65; }

.world-gif-showcase { margin-top: 18px; padding: 22px 18px 18px; overflow: hidden; border: 1px solid #283147; border-radius: 26px; background: #111827; box-shadow: 0 24px 62px rgba(0,0,0,.24); }
.world-gif-row + .world-gif-row { margin-top: 12px; }
.world-gif-row-heading { margin: 0 auto 18px; text-align: center; }
.world-gif-row-heading span { display: block; color: #e5edf8; font-size: clamp(18px, 2.2vw, 28px); font-weight: 800; line-height: 1.2; letter-spacing: -.015em; }
.world-gif-marquee { position: relative; height: clamp(122px, 11.7vw, 170px); overflow: hidden; border-radius: 15px; background: #0a101b; isolation: isolate; }
.world-gif-marquee::after { content: ""; position: absolute; z-index: 2; inset: 0; border: 1px solid rgba(64,78,103,.62); border-radius: inherit; box-shadow: inset 34px 0 32px -28px rgba(5,9,16,.82), inset -34px 0 32px -28px rgba(5,9,16,.82); pointer-events: none; }
.world-gif-track { width: max-content; height: 100%; display: flex; animation: world-gif-scroll-right 132s linear infinite; will-change: transform; }
.world-gif-track-two { animation-duration: 120s; animation-delay: -31s; }
.world-gif-track-three { animation-duration: 120s; animation-delay: -64s; }
.world-gif-sequence { height: 100%; display: flex; flex: none; gap: 10px; padding-right: 10px; }
.world-gif-item { height: 100%; width: auto; flex: 0 0 auto; margin: 0; overflow: hidden; border-radius: 12px; background: #080d16; }
.world-gif-item img { width: auto; height: 100%; display: block; user-select: none; }

@keyframes world-gif-scroll-right {
  from { transform: translate3d(-50%, 0, 0); }
  to { transform: translate3d(0, 0, 0); }
}

.world-gif-showcase:hover .world-gif-track { animation-play-state: paused; }
.world-gif-note { width: 100%; max-width: none; margin: 16px auto 0; padding: 0 8px; color: #96a3b7; font-size: 12px; line-height: 1.6; text-align: center; white-space: nowrap; }

.method-section, .results-section, .citation-section { padding: 110px 0; }
.framed-figure, .comparison-figure, .modeling-figure, .dataset-figure, .propagation-figure { overflow: hidden; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: 0 16px 50px rgba(24, 39, 67, .07); }
.framed-figure img, .comparison-figure img, .modeling-figure img, .dataset-figure img, .propagation-figure img { width: 100%; }
figcaption { padding: 13px 18px 16px; color: var(--muted); background: #fff; font-size: 12px; line-height: 1.55; }
.method-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 36px; }
.method-grid article { padding: 26px 4px 0; border-top: 2px solid var(--ink); }
.method-tag { color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
.method-grid h3 { margin: 10px 0 8px; font-size: 22px; letter-spacing: -.025em; }
.method-grid p { margin: 0; color: var(--muted); font-size: 15px; }

.capabilities-section { padding: 100px 0; background: var(--soft); }
.capability-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.capability-grid article { position: relative; min-height: 218px; padding: 29px 32px; border: 1px solid var(--line); border-radius: 20px; background: #fff; }
.capability-grid article > span { color: #a8b1c1; font-size: 12px; font-weight: 800; letter-spacing: .12em; }
.capability-grid h3 { margin: 35px 0 7px; font-size: 23px; letter-spacing: -.025em; }
.capability-grid p { max-width: 480px; margin: 0; color: var(--muted); font-size: 15px; }

.camera-understanding-block { margin-bottom: 86px; }
.perception-metrics { margin-bottom: 42px; }
.perception-metrics article { border-color: #dbe6f4; background: linear-gradient(145deg, #fff 0%, #f6f9fd 100%); }
.perception-metrics strong { font-size: 36px; }
.table-heading { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(280px, .8fr); align-items: end; gap: 46px; margin: 0 0 18px; }
.table-heading h3 { margin: 0; font-size: 25px; line-height: 1.25; letter-spacing: -.025em; }
.table-heading > p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.55; }
.table-label { margin: 0 0 5px; color: var(--blue); font-size: 11px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.benchmark-table-wrap { max-width: 100%; overflow-x: auto; border: 1px solid #dfe4ec; border-radius: 18px; background: #fff; box-shadow: 0 12px 34px rgba(31, 47, 74, .06); scrollbar-gutter: stable; }
.benchmark-table-wrap:focus-visible { outline: 3px solid rgba(35, 104, 196, .28); outline-offset: 3px; }
.benchmark-table { width: 100%; min-width: 1320px; border-collapse: separate; border-spacing: 0; color: #303846; font-size: 13px; line-height: 1.35; font-variant-numeric: tabular-nums; }
.benchmark-table th, .benchmark-table td { padding: 10px 9px; border-right: 1px solid #edf0f4; border-bottom: 1px solid #edf0f4; text-align: center; white-space: nowrap; }
.benchmark-table thead th { color: #26354c; background: #eef4fb; font-size: 11px; font-weight: 800; letter-spacing: .025em; }
.benchmark-table thead tr:first-child th { padding-top: 13px; padding-bottom: 13px; color: #174a95; background: #e4eef9; font-size: 12px; }
.benchmark-table thead tr:first-child th:first-child { position: sticky; left: 0; z-index: 4; width: 110px; min-width: 110px; }
.benchmark-table thead tr:first-child th:nth-child(2) { position: sticky; left: 110px; z-index: 4; width: 150px; min-width: 150px; }
.benchmark-table tbody:last-child tr:last-child > * { border-bottom: 0; }
.benchmark-table tr > *:last-child { border-right: 0; }
.benchmark-table tbody + tbody tr:first-child > * { border-top: 2px solid #cbd6e4; }
.dataset-cell { position: sticky; left: 0; z-index: 2; width: 110px; min-width: 110px; color: #36516f; background: #f7f9fc; font-size: 12px; font-weight: 800; }
.method-cell { position: sticky; left: 110px; z-index: 2; width: 150px; min-width: 150px; color: #394150; background: #fff; text-align: left !important; font-weight: 650; }
.benchmark-table tbody tr:hover td, .benchmark-table tbody tr:hover .method-cell { background-color: #f8fbff; }
.benchmark-table td.best { color: #134f9f; background: #dceafb; font-weight: 800; }
.benchmark-table td.second { color: #455267; background: #edf1f6; font-weight: 750; }
.benchmark-table .ours-row td { font-weight: 750; }
.benchmark-table .ours-row .method-cell { color: var(--blue-dark); background: #edf5ff; font-weight: 850; }
.benchmark-table .ours-row td.best { background: #cfe3fb; }
.benchmark-note { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 13px 2px 0; color: var(--muted); font-size: 12px; }
.legend-best, .legend-second { display: inline-flex; align-items: center; min-height: 25px; padding: 3px 9px; border-radius: 7px; font-size: 10px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; }
.legend-best { color: #134f9f; background: #dceafb; }
.legend-second { color: #455267; background: #edf1f6; }
.results-divider { height: 1px; margin: 0 0 86px; background: linear-gradient(90deg, transparent, #d8dee8 14%, #d8dee8 86%, transparent); }

.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 34px; }
.metrics-grid article { padding: 26px 18px; border: 1px solid var(--line); border-radius: 16px; text-align: center; background: #fff; }
.metrics-grid strong { display: block; color: var(--blue); font-size: 32px; line-height: 1.1; letter-spacing: -.04em; }
.metrics-grid span { display: block; margin-top: 8px; color: var(--muted); font-size: 12px; }
.propagation-figure { margin: 0; }
.propagation-card { display: grid; grid-template-columns: .75fr 1.25fr; gap: 55px; margin: 36px 0; padding: 34px; border-radius: 22px; color: #fff; background: var(--ink); }
.propagation-card h3 { margin: 0; font-size: 28px; letter-spacing: -.03em; }
.propagation-card p:last-child { margin: 10px 0 0; color: #aab3c2; font-size: 14px; }
.propagation-metrics { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; align-content: center; }
.propagation-metrics span { padding: 13px 15px; border: 1px solid #343c50; border-radius: 12px; background: #1b2131; }
.propagation-metrics small, .propagation-metrics strong { display: block; }
.propagation-metrics small { color: #8e9aaf; font-size: 10px; text-transform: uppercase; letter-spacing: .08em; }
.propagation-metrics strong { margin-top: 4px; font-size: 15px; }
.modeling-figure { margin-top: 36px; }
.modeling-gallery { padding: clamp(8px, 1.4vw, 16px); }
.modeling-gallery img { border-radius: 11px; }
.modeling-gallery img + img { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--line); }
.modeling-gallery figcaption { margin: 10px calc(-1 * clamp(8px, 1.4vw, 16px)) calc(-1 * clamp(8px, 1.4vw, 16px)); }

.data-section { padding: 110px 0; background: #f5f7fa; }
.data-stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-bottom: 28px; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: var(--line); }
.data-stats article { min-height: 138px; padding: 25px; background: #fff; }
.data-stats strong, .data-stats span { display: block; }
.data-stats strong { color: var(--ink); font-size: 38px; line-height: 1; letter-spacing: -.05em; }
.data-stats span { margin-top: 13px; color: var(--muted); font-size: 13px; line-height: 1.4; }
.center-actions { margin-top: 26px; text-align: center; }
.applications-figure { margin: 0; }
.data-intelligence { margin-top: 86px; padding-top: 86px; border-top: 1px solid var(--line); }
.release-figure-link { display: block; color: inherit; text-decoration: none; }
.release-figure { transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.release-figure-link:hover .release-figure { transform: translateY(-2px); border-color: #b4ccef; box-shadow: 0 20px 56px rgba(24, 39, 67, .12); }
.release-figure-link:focus-visible { outline: 3px solid rgba(35, 104, 196, .28); outline-offset: 5px; border-radius: 20px; }
.release-link-cue { color: var(--blue); font-weight: 800; white-space: nowrap; }
.supp-propagation-figure { margin: 0; }

.compact-heading { grid-template-columns: 1fr; margin-bottom: 24px; }
.bibtex-wrap { position: relative; overflow: hidden; border: 1px solid #2c3445; border-radius: 18px; background: #151b28; }
.bibtex-wrap pre { margin: 0; padding: 28px 145px 28px 30px; overflow-x: auto; color: #c9d4e7; font: 13px/1.65 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace; }
#copy-bibtex { position: absolute; top: 18px; right: 18px; padding: 8px 12px; border: 1px solid #414b62; border-radius: 9px; color: #c7d1e1; background: #232b3b; font-size: 12px; cursor: pointer; }
#copy-bibtex:hover { color: #fff; border-color: #65728c; }

footer { border-top: 1px solid var(--line); background: #fafbfc; }
.footer-inner { min-height: 150px; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 13px; }
.footer-brand img { width: 46px; height: 46px; object-fit: contain; }
.footer-brand strong, .footer-brand span { display: block; }
.footer-brand strong { letter-spacing: -.02em; }
.footer-brand span { color: var(--muted); font-size: 12px; }
.footer-meta { max-width: 590px; display: flex; flex-direction: column; align-items: flex-end; gap: 3px; text-align: right; }
.footer-meta p { margin: 0; color: var(--muted); font-size: 12px; }
.footer-back-to-top { font-size: 13px; font-weight: 720; }

.pill-supp-icon { width: 18px; height: 18px; flex: 0 0 auto; }
.results-subsection-divider { margin: 86px 0; }
.world-modeling-heading { margin-bottom: 34px; }
.supplementary-inline-cta { display: flex; justify-content: center; margin: 25px 0 0; }
.supplementary-inline-cta .pill { padding-inline: 20px; }
.supp-hero { padding: 82px 0 74px; text-align: center; }
.supp-hero-logo { width: 92px; height: 92px; margin: 0 auto 8px; object-fit: contain; }
.supp-hero h1 { font-size: clamp(50px, 7vw, 76px); }
.supp-subtitle { max-width: 780px; margin: 22px auto 0; color: #555e6e; font-size: 20px; line-height: 1.55; }
.supp-hero-actions { display: flex; justify-content: center; margin-top: 28px; }
.supp-result { padding: 88px 0; }
.supp-result-heading { max-width: 870px; margin: 0 auto 30px; text-align: center; }
.supp-result-heading h2 { margin: 0; font-size: clamp(34px, 4.4vw, 50px); line-height: 1.12; letter-spacing: -.043em; }
.supp-result-heading > p:last-child { max-width: 800px; margin: 18px auto 0; color: var(--muted); font-size: 16px; }
.supp-result-band { background: var(--soft); }
.supp-figure { overflow: hidden; border: 1px solid var(--line); border-radius: 21px; background: #fff; box-shadow: 0 18px 54px rgba(24, 39, 67, .08); }
.supp-figure img { width: 100%; height: auto; }
.supp-figure figcaption { border-top: 1px solid var(--line); }
.supp-return { padding: 96px 0; background: #eef4fb; text-align: center; }
.supp-return h2 { margin: 0; font-size: clamp(34px, 4.2vw, 48px); line-height: 1.14; letter-spacing: -.04em; }
.supp-return p:not(.section-kicker) { max-width: 650px; margin: 16px auto 25px; color: var(--muted); }
.supp-nav-links { margin-left: auto; }
.supplementary-page .nav-paper { margin-left: 4px; }

@media (max-width: 920px) {
  .nav-links { display: none; }
  .nav-paper { margin-left: auto; }
  .section-heading { grid-template-columns: 1fr; gap: 18px; }
  .table-heading { grid-template-columns: 1fr; gap: 10px; }
  .supplementary-page .nav-paper { margin-left: auto; }
  .state-grid, .method-grid { grid-template-columns: 1fr; }
  .state-card { min-height: auto; }
  .world-app { grid-template-columns: 1fr; }
  .world-sidebar { display: block; border-right: 0; border-bottom: 1px solid #2a3245; }
  .scene-list { display: flex; gap: 8px; overflow-x: auto; overflow-y: hidden; padding: 0 0 4px; scrollbar-width: thin; }
  .scene-list::-webkit-scrollbar { width: auto; height: 5px; }
  .scene-button { min-width: 150px; display: flex; padding: 7px; }
  .scene-button:hover { transform: none; }
  .scene-thumb { width: 48px; height: 48px; margin-bottom: 0; }
  .scene-button small { display: block; }
  .explorer-main { padding: 12px; }
  .world-stage-grid { grid-template-columns: minmax(270px, 290px) minmax(0, 1fr); gap: 10px; }
  .world-state-card { grid-template-columns: minmax(130px, 1fr) 104px; gap: 8px; padding: 6px; }
  .canvas-panel { min-height: 510px; }
  .metrics-grid, .data-stats { grid-template-columns: repeat(2, 1fr); }
  .propagation-card { grid-template-columns: 1fr; gap: 24px; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .section-shell { width: min(100% - 28px, var(--max)); }
  .nav-shell { width: calc(100% - 24px); height: 60px; gap: 12px; }
  .brand { gap: 8px; }
  .brand-project { gap: 7px; }
  .brand-puffin { width: 34px; height: 34px; }
  .brand-affiliation-divider { height: 22px; }
  .brand-partners { gap: 7px; }
  .brand-mmlab { height: 19px; }
  .brand-ntu { height: 20px; }
  .brand-ace { height: 17px; }
  .brand-partner-divider { height: 16px; }
  .hero { padding: 50px 0 48px; }
  .hero-logo { width: 92px; height: 92px; }
  .subtitle { font-size: 27px; }
  .desktop-break { display: none; }
  .authors { font-size: 14px; }
  .affiliations { font-size: 12px; }
  .hero-actions { gap: 8px; }
  .pill { min-height: 42px; padding: 8px 14px; font-size: 13px; }
  .teaser-section { padding-bottom: 72px; }
  .data-intelligence { margin-top: 62px; padding-top: 62px; }
  .hero-figure { border-radius: 14px; }
  .lead-copy { margin: 54px auto 32px; }
  .lead-copy > p:last-child { font-size: 17px; }
  .lead-copy h2, .section-heading h2, .compact-heading h2 { font-size: 34px; }
  .world-section, .method-section, .results-section, .citation-section, .data-section, .capabilities-section { padding: 72px 0; }
  .world-app { min-height: 0; border-radius: 17px; }
  .world-sidebar { padding: 19px 14px 16px; }
  .scene-list { display: flex; gap: 8px; overflow-x: auto; padding-bottom: 3px; scrollbar-width: thin; }
  .scene-button { min-width: 150px; display: flex; padding: 7px; }
  .scene-thumb { width: 48px; height: 48px; margin-bottom: 0; }
  .scene-button small { display: block; }
  .explorer-main { padding: 9px; }
  .world-stage-grid { grid-template-columns: 1fr; gap: 10px; }
  .world-state-stack { grid-template-rows: none; grid-auto-rows: auto; }
  .world-state-card { grid-template-columns: 116px minmax(0, 1fr); gap: 13px; padding: 8px; }
  .world-state-card video { width: 116px; }
  .world-state-card strong { font-size: 12px; }
  .world-state-card small { font-size: 10px; }
  .reconstruction-panel { grid-template-rows: auto auto auto; }
  .reconstruction-heading { min-height: 58px; padding: 10px 12px; }
  .canvas-panel { width: 100%; height: clamp(360px, 115vw, 430px); min-height: 0; contain: layout paint; }
  #point-cloud { min-width: 1px; min-height: 1px; }
  .canvas-topbar { top: 13px; left: 13px; right: 13px; }
  .live-dot { max-width: 72%; overflow: hidden; font-size: 9px; text-overflow: ellipsis; white-space: nowrap; }
  .axis-widget { right: 15px; bottom: 20px; transform: scale(.8); }
  .gesture-hint { bottom: 13px; }
  .world-state-caption { min-height: 0; padding: 11px 13px 12px; }
  .world-gif-showcase { margin-top: 12px; padding: 14px 11px 11px; border-radius: 17px; }
  .world-gif-row + .world-gif-row { margin-top: 8px; }
  .world-gif-row-heading { margin: 0 6px 12px; }
  .world-gif-row-heading span { font-size: 16px; line-height: 1.3; }
  .world-gif-marquee { height: 112px; border-radius: 11px; }
  .world-gif-sequence { gap: 7px; padding-right: 7px; }
  .world-gif-item { border-radius: 9px; }
  .world-gif-note { margin-top: 12px; padding: 0 4px; font-size: 11px; line-height: 1.55; white-space: normal; }
  .capability-grid, .metrics-grid, .data-stats { grid-template-columns: 1fr; }
  .capability-grid article { min-height: 195px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .camera-understanding-block { margin-bottom: 62px; }
  .results-subsection-divider { margin: 62px 0; }
  .supp-hero { padding: 56px 0 52px; }
  .supp-hero-logo { width: 76px; height: 76px; }
  .supp-subtitle { font-size: 17px; }
  .supp-result { padding: 62px 0; }
  .supp-result-heading { margin-bottom: 22px; text-align: left; }
  .supp-result-heading h2 { font-size: 34px; }
  .supp-result-heading > p:last-child { font-size: 15px; }
  .supp-figure { border-radius: 14px; }
  .supp-return { padding: 70px 0; }
  .results-divider { margin-bottom: 62px; }
  .perception-metrics strong { font-size: 30px; }
  .table-heading h3 { font-size: 22px; }
  .benchmark-table { min-width: 1220px; font-size: 12px; }
  .benchmark-table th, .benchmark-table td { padding: 9px 7px; }
  .benchmark-table thead tr:first-child th:first-child, .dataset-cell { width: 90px; min-width: 90px; }
  .benchmark-table thead tr:first-child th:nth-child(2), .method-cell { left: 90px; width: 140px; min-width: 140px; }
  .propagation-card { padding: 24px 20px; }
  .propagation-metrics { grid-template-columns: 1fr; }
  .bibtex-wrap pre { padding: 62px 20px 24px; font-size: 11px; }
  .footer-inner { padding: 34px 0; display: block; }
  .footer-meta { margin-top: 22px; align-items: flex-start; text-align: left; }
}

@media (max-width: 520px) {
  .brand-name { display: none; }
}

@media (max-width: 420px) {
  .nav-shell { gap: 6px; }
  .brand { gap: 4px; }
  .brand-puffin { width: 30px; height: 30px; }
  .brand-affiliation-divider { height: 20px; }
  .brand-partners { gap: 3px; }
  .brand-mmlab { height: 14px; }
  .brand-ntu { height: 15px; }
  .brand-ace { height: 13px; }
  .brand-partner-divider { height: 14px; }
  .supplementary-page .nav-paper { padding: 7px 8px; font-size: 11px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
  .world-gif-track { animation: none !important; transform: translate3d(-50%, 0, 0); }
}