@font-face{font-family:"Archivo";src:url(../assets/fonts/Archivo.woff2) format("woff2");font-weight:100 900;font-stretch:62% 125%;font-display:swap}
@font-face{font-family:"Archivo";src:url(../assets/fonts/Archivo-Italic.woff2) format("woff2");font-weight:100 900;font-stretch:62% 125%;font-style:italic;font-display:swap}
@font-face{font-family:"JetBrains Mono";src:url(../assets/fonts/JetBrainsMono.woff2) format("woff2");font-weight:100 800;font-display:swap}

:root{
  --ink:#0e1013; --ink-2:#454a52; --ink-3:#6a7079; --rule:#e2e3e6; --rule-2:#eef0f2;
  --bg:#f5f5f6; --card:#ffffff; --night:#0b0e13;
  --cam:#c9281c; --cam-soft:#fdecea; --cam-light:#ff6a5c;
  --flow:#2a5fe0; --flow-soft:#e9effd; --flow-light:#9db9ff;
  --ok:#0f7a4a; --bad:#c2321f;
  --sans:"Archivo",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:"JetBrains Mono",ui-monospace,monospace;
  --radius:22px;
  --shadow:0 1px 2px rgba(15,20,30,.04),0 14px 40px rgba(15,20,30,.06);
  --wrap:1200px; --gutter:40px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--sans);font-size:18px;line-height:1.6;color:var(--ink);background:var(--bg);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,video,canvas{display:block;max-width:100%}
a{color:inherit}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2.5px solid var(--flow);outline-offset:3px;border-radius:6px}
sup{font-size:.62em;line-height:0;margin-left:.08em;font-weight:500}
.skip{position:absolute;left:-999px;top:8px;background:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:8px}
.k-cam{color:var(--cam)} .k-flow{color:var(--flow)}

/* ================= HERO ================= */
.hero{position:relative;min-height:100svh;color:#fff;overflow:hidden;background:#0a0e15;display:flex;flex-direction:column}
.hero-wash{position:absolute;inset:0;z-index:0;pointer-events:none;overflow:hidden}
.hero-wash canvas{position:absolute;inset:-8%;width:116%;height:116%;filter:blur(54px) saturate(1.45) brightness(.95);opacity:.78;transition:opacity .8s}
.hero-wash::after{content:"";position:absolute;inset:0;background:linear-gradient(to bottom,rgba(8,11,17,.55) 0,rgba(8,11,17,.28) 42%,rgba(8,11,17,.62) 100%)}
.hero>*{position:relative;z-index:2}
.hero>.hero-wash{position:absolute;z-index:0}
.hero-nav{display:flex;align-items:center;justify-content:space-between;gap:24px;height:92px;padding:0 48px}
.orgs{display:flex;align-items:center;gap:24px}
.orgs img{width:auto;display:block;filter:brightness(0) invert(1)}
.org-tencent{height:30px} .org-hkust{height:40px} .org-poly{height:40px} .org-ipp{height:28px}
.org-x{display:flex;align-items:center;gap:12px}
.org-rule-in{height:26px;opacity:.6}
.org-tc{display:flex;align-items:center;gap:10px}
.orgs img.org-mark{height:34px;filter:none}
.org-rule{width:1px;height:34px;background:rgba(255,255,255,.55)}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-links a,.nav-present{white-space:nowrap;height:38px;padding:0 18px;display:inline-flex;align-items:center;border-radius:999px;font-size:15px;font-weight:550;text-decoration:none;color:#fff;background:rgba(255,255,255,.14);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);transition:background .2s}
.nav-links a:hover,.nav-present:hover{background:rgba(255,255,255,.26)}
.hero-center{padding:18px 40px 0;text-align:center;display:flex;flex-direction:column;align-items:center}
.wordmark{font-weight:780;font-size:clamp(46px,5.2vw,78px);line-height:.95;letter-spacing:-.04em;color:#fff}
.wordmark span{color:#ff5446}
.paper-title{margin-top:10px;font-size:clamp(20px,1.85vw,28px);font-weight:680;letter-spacing:-.008em;line-height:1.3;text-wrap:balance;color:rgba(255,255,255,.94)}
.t-left{color:var(--flow-light)} .t-right{color:var(--cam-light)}
.authors{margin-top:12px;display:flex;flex-wrap:wrap;justify-content:center;gap:2px 20px;font-size:16px;font-weight:500;color:rgba(255,255,255,.9)}
.authors sup{color:rgba(255,255,255,.6)}
.affils{margin-top:2px;display:flex;flex-wrap:wrap;justify-content:center;gap:0 16px;font-size:13.5px;color:rgba(255,255,255,.72)}
.hero-actions{margin-top:10px;display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.pill{height:40px;padding:0 19px;display:inline-flex;align-items:center;gap:8px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;white-space:nowrap}
.pill svg{width:18px;height:18px}
.pill em{font-style:normal;font-size:12px;font-weight:500;opacity:.72}
.hero .pill-main{background:#fff;color:var(--ink)}
.hero .pill-main:hover{background:#e6e8ec}
.pill-glass{background:rgba(255,255,255,.16);color:#fff;box-shadow:inset 0 0 0 1px rgba(255,255,255,.4);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.pill-glass:hover{background:rgba(255,255,255,.28)}
.hero .pill-off{background:rgba(255,255,255,.08);color:rgba(255,255,255,.62)}
.pill-line{box-shadow:inset 0 0 0 1.5px var(--ink);color:var(--ink)}
.pill-line:hover{background:var(--rule-2)}

/* demo: one clip in, three synchronized outputs */
.demo{--tile-h:clamp(250px,42vh,440px);margin:20px 36px 0;padding:16px 16px 10px;border-radius:26px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(22px) saturate(1.2);-webkit-backdrop-filter:blur(22px) saturate(1.2);color:#fff;box-shadow:0 20px 60px rgba(0,0,0,.28)}
.demo-head{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:2px 6px 12px}
.demo-title{font-size:18px;font-weight:650;letter-spacing:-.01em}
.demo-live{font-size:14px;font-weight:600;color:#e6eaf1;display:flex;align-items:center;gap:10px;white-space:nowrap}
.demo-live .dl{display:inline-flex;align-items:center;gap:8px;padding:5px 12px;border-radius:999px;background:rgba(255,255,255,.12)}
.demo-live .dl small{font-size:11.5px;font-weight:600;opacity:.72;text-transform:uppercase;letter-spacing:.04em}
.demo-live .dl.on{color:#bcd0ff;box-shadow:inset 0 0 0 1px rgba(157,185,255,.45)} .demo-live .dl.off{color:#ffb3aa;box-shadow:inset 0 0 0 1px rgba(255,138,126,.45)}
.demo-live .dl em{font-style:normal;font-size:11.5px;font-weight:650;padding:1px 7px;border-radius:999px;background:rgba(255,255,255,.12);color:#fff;opacity:.85}
.demo-live .eq{color:rgba(255,255,255,.7);font-weight:600;font-size:16px}
.demo-grid{display:grid;grid-template-columns:minmax(0,1.3fr) minmax(0,2.5fr);gap:10px;align-items:center}
.demo-outs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}
.tile{position:relative;margin:0;height:var(--tile-h);border-radius:16px;overflow:hidden;background:rgba(10,14,21,.42);min-width:0;box-shadow:inset 0 0 0 1px rgba(255,255,255,.12)}
.tile canvas{position:absolute;inset:0;width:100%;height:100%}
.demo-src{position:absolute;left:0;top:0;width:2px;height:2px;opacity:0;pointer-events:none}
.tile-k{position:absolute;left:10px;top:9px;z-index:3;font-size:13px;font-weight:650;line-height:1;padding:5px 11px 5px 5px;border-radius:999px;background:rgba(10,14,21,.66);color:#fff;white-space:nowrap;display:inline-flex;align-items:center;gap:7px;backdrop-filter:blur(6px)}
.tile-k b{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:#fff;color:#0d1117;font-size:11.5px;font-weight:800}
.tile-k small{font-size:11.5px;font-weight:550;opacity:.72}
.tile-pose .tile-k small,.tile-flow .tile-k small{display:none}
@media (min-width:1500px){.tile-pose .tile-k small,.tile-flow .tile-k small{display:inline}}
.tile-k.k-cam{color:#ffb3aa} .tile-k.k-flow{color:#bcd0ff}
.demo-model{display:flex;align-items:center;justify-content:center}
.demo-chip{writing-mode:vertical-rl;transform:rotate(180deg);font-size:13px;font-weight:750;letter-spacing:.04em;padding:14px 8px;border-radius:999px;background:var(--cam);color:#fff;box-shadow:0 6px 18px rgba(201,40,28,.35)}
.tile-text{padding:44px 12px 10px;display:flex;flex-direction:column;background:rgba(10,14,21,.5)}
.demo-out{font-size:15px;line-height:1.4;color:#fff;overflow:hidden}
.demo-out .sub{display:block;font-size:10.5px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:rgba(255,255,255,.5);margin-bottom:4px}
.demo-out .cap{font-size:14px;line-height:1.38;color:#fff;padding-bottom:9px;margin-bottom:9px;border-bottom:1px solid rgba(255,255,255,.14)}
.demo-out .q{display:block;font-size:13px;line-height:1.35;color:rgba(255,255,255,.7);margin-bottom:6px}
.demo-out .opt{display:flex;gap:9px;align-items:baseline;padding:5px 9px;margin:0 -9px 2px;border-radius:10px;font-size:14px;line-height:1.3;color:rgba(255,255,255,.62)}
.demo-out .opt i{font-style:normal;font-family:var(--mono);font-size:12.5px;opacity:.8}
.demo-out .opt.pick{background:rgba(52,199,123,.2);box-shadow:inset 0 0 0 1.5px #3ddc8a;color:#fff;font-weight:700;font-size:15px}
.demo-out .opt.pick i{color:#7cf0b2;opacity:1}
.demo-out .opt .tick{margin-left:auto;font-size:13px;font-weight:800;color:#7cf0b2;white-space:nowrap}
.demo-out .row{display:flex;gap:8px;font-family:var(--mono);font-size:11.5px;line-height:1.5;white-space:nowrap}
.demo-out .row i{font-style:normal;color:rgba(255,255,255,.55);min-width:92px}
.demo-out .row b{font-weight:600;overflow:hidden;text-overflow:ellipsis}
.demo-out .row.hot b{color:#ffb3aa}
.demo-note{margin:8px 6px 0;text-align:center;font-size:12.5px;line-height:1.4;color:rgba(255,255,255,.62)}
.hero-foot{margin-top:2px;text-align:center;font-size:11.5px;line-height:1.4;letter-spacing:.01em;color:rgba(255,255,255,.42)}
.demo{margin-bottom:22px}

/* API dialog */
.api-dialog{margin:auto;border:0;border-radius:18px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.35);width:min(760px,94vw);max-height:90vh;padding:28px 30px 24px;color:var(--ink)}
.api-dialog::backdrop{background:rgba(6,9,14,.72)}
.api-dialog h3{font-size:22px;margin-bottom:8px}
.api-lede,.api-note{font-size:15px;line-height:1.55;color:var(--ink-2)}
.api-dialog a{color:var(--flow)}
.api-dialog code{font-family:var(--mono);font-size:.88em;background:var(--rule-2);padding:1px 5px;border-radius:5px}
.api-block{margin-top:14px}
.api-bar{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px;font-size:13px;font-weight:650;color:var(--ink-3)}
.api-block pre{font-family:var(--mono);font-size:13px;line-height:1.6;background:#0f1319;color:#e6e8eb;padding:14px 16px;border-radius:12px;overflow-x:auto}
.api-note{margin-top:14px}

/* ================= SECTIONS ================= */
.wrap{max-width:calc(var(--wrap) + 2*var(--gutter));margin:0 auto;padding:0 var(--gutter)}
.section{padding-top:120px}
.section .slide+.slide{margin-top:96px}
.sec-head{margin-bottom:36px}
.sec-head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:40px}
.head-actions{flex:none}
.eyebrow{font-size:15.5px;font-weight:650;color:var(--cam);margin-bottom:12px}
h2{font-size:clamp(32px,3.7vw,54px);font-weight:760;letter-spacing:-.03em;line-height:1.08;max-width:19em;text-wrap:balance}
h3{font-size:21px;font-weight:700;letter-spacing:-.012em;line-height:1.3}
.lede{margin-top:16px;font-size:19px;line-height:1.55;color:var(--ink-2);max-width:40em;text-wrap:pretty}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}
figure{margin:0}
figcaption,.mini-note{font-size:15.5px;line-height:1.55;color:var(--ink-2);text-wrap:pretty}
figcaption b{color:var(--ink);font-weight:650}
.fig-card{padding:26px 28px 22px;display:flex;flex-direction:column;justify-content:center}
.fig-card figcaption{margin-top:16px}
.zoomable{display:block;width:100%;cursor:zoom-in;border-radius:10px;overflow:hidden}
.zoomable img{width:100%;height:auto}
.chart-card{padding:22px 26px 20px;display:flex;flex-direction:column;min-width:0}
.chart-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.chart-title{font-size:16px;font-weight:650}
.chart{flex:1;min-height:360px;width:100%;margin-top:6px}
.chart-tall{min-height:440px}
.chart-grid{min-height:560px}
.chart-card figcaption{margin-top:10px}
.legend{display:flex;flex-wrap:wrap;gap:6px 16px;font-size:13.5px;color:var(--ink-2)}
.legend span{display:inline-flex;align-items:center;gap:6px}
.legend i{width:11px;height:11px;border-radius:3px;display:inline-block}
.seg{display:inline-flex;background:var(--rule-2);border-radius:999px;padding:3px}
.seg button{height:32px;padding:0 13px;border-radius:999px;font-size:13.5px;font-weight:550;color:var(--ink-2)}
.seg button[aria-pressed="true"]{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.pill-dark{background:var(--ink);color:#fff}
.pill-dark:hover{background:#2a2e35}
.pill-off{background:var(--rule-2);color:var(--ink-3);cursor:default}

/* overview + abstract */
.tbl-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start}
.tbl-card{padding:18px 22px 14px;overflow-x:auto}
.tbl-card .rtable{min-width:520px}
.tbl-note{margin-top:14px}
.cat-grid{display:grid;grid-template-columns:minmax(0,2.5fr) minmax(0,1fr);gap:24px;align-items:stretch}
.ov-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px;align-items:stretch}
.teaser-card{justify-content:center;padding:22px 24px}
.teaser-card .zoomable{display:block}
.teaser-card img{width:100%;height:auto}
.teaser-card figcaption{margin-top:16px}
.ov-grid .chart-tall{min-height:400px}
.tbl-one{padding:10px 28px 14px}
.tbl-one .rtable tbody tr:last-child td{border-bottom:0}
.tbl-hint{display:none}
.tbl-one .rtable{font-size:15.5px}
.tbl-one .rtable td{padding:4px 14px}
.tbl-one .rtable th{padding:10px 14px 8px}
.abstract{margin-top:24px;padding:30px 34px 32px}
.abstract h3{font-size:24px}
.abs-top{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:12px}
.abs-short{display:none}
.abstract.is-short .abs-short{display:block}.abstract.is-short .abs-full{display:none}
.abstract p{font-size:16px;line-height:1.62;color:#1f2226;text-align:left;hyphens:auto}

/* problem */
.pr-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:24px;align-items:stretch}
.how{margin:0 0 24px}
.how-k{font-size:15px;font-weight:650;color:var(--ink-3);margin-bottom:10px}
.how-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.how-item{display:flex;gap:16px;align-items:flex-start;padding:20px 24px;border-radius:18px;background:var(--card);box-shadow:var(--shadow)}
.how-no{flex:none;display:grid;place-items:center;width:38px;height:38px;border-radius:50%;font-weight:760;font-size:18px}
.how-cam .how-no{background:var(--cam-soft);color:var(--cam)}
.how-flow .how-no{background:var(--flow-soft);color:var(--flow)}
.how-item p{font-size:18px;line-height:1.45;color:var(--ink-2)}
.how-item b{color:var(--ink);font-weight:680}

/* method */
.fig-wide{padding:30px 34px 24px}
.m-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:26px}
.m-item{border-top:2px solid var(--ink);padding-top:14px}
.m-tag{font-size:14px;font-weight:650;color:var(--ink-3);margin-bottom:4px}
.m-item h3{margin-bottom:6px}
.m-item p:last-child{font-size:16px;line-height:1.55;color:var(--ink-2)}
.note-line{margin-top:20px;font-size:17px;font-weight:600;color:var(--ink)}

/* qualitative */
.player{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);overflow:hidden;align-items:stretch}
.player-media{position:relative;background:#000;display:flex;align-items:center;min-width:0}
.player-media video{width:100%;aspect-ratio:16/9;object-fit:contain;background:#000}
.player-label{position:absolute;left:16px;top:14px;padding:6px 12px;border-radius:999px;background:rgba(6,9,14,.62);color:#fff;font-size:14px;font-weight:600;backdrop-filter:blur(6px)}
.player-side{padding:24px 28px 22px;display:flex;flex-direction:column;min-width:0}
.player-src{font-size:13.5px;color:var(--ink-3);font-weight:550}
.player-side h3{margin-top:6px;font-size:20px}
.player-opts{list-style:none;margin-top:12px;display:grid;gap:5px}
.player-opts li{display:flex;gap:10px;align-items:baseline;font-size:15px;padding:5px 12px;border-radius:10px;background:var(--rule-2)}
.player-opts li b{font-family:var(--mono);font-size:13px;color:var(--ink-3)}
.player-opts li.gold{background:#e7f5ee;font-weight:650}
.player-opts li.gold b{color:var(--ok)}
.player-opts li.gold::after{content:"✓ Answer";margin-left:auto;padding-left:8px;white-space:nowrap;font-size:12.5px;font-weight:650;color:var(--ok)}
.answers{margin-top:14px;display:grid;gap:2px;border-top:1px solid var(--rule);padding-top:10px}
.ans{display:grid;grid-template-columns:1fr auto auto;gap:12px;align-items:center;font-size:15px;padding:3px 0}
.ans .who{font-weight:550}
.ans .pick{font-family:var(--mono);font-size:13.5px;color:var(--ink-2)}
.ans .v{font-size:13.5px;font-weight:650;min-width:78px;text-align:right}
.ans .v.y{color:var(--ok)} .ans .v.n{color:var(--bad)}
.ans.ours{margin:2px -10px;padding:5px 10px;border-radius:10px;background:var(--cam-soft)}
.ans.ours .who{color:var(--cam);font-weight:750}
.thumbs{margin-top:14px;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
.thumb{position:relative;border-radius:12px;overflow:hidden;aspect-ratio:16/9;background:#111;text-align:left}
.thumb img{width:100%;height:100%;object-fit:cover;opacity:.78;transition:opacity .2s,transform .3s}
.thumb span{position:absolute;left:8px;bottom:6px;right:8px;font-size:12.5px;font-weight:650;color:#fff;text-shadow:0 1px 6px rgba(0,0,0,.85);line-height:1.2}
.thumb:hover img{opacity:1;transform:scale(1.03)}
.thumb[aria-selected="true"]{box-shadow:0 0 0 3px var(--cam)}
.thumb[aria-selected="true"] img{opacity:1}

/* applications */
.apps{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);overflow:hidden;align-items:stretch}
.apps-media{position:relative;background:#000;display:flex;align-items:center;min-width:0}
.apps-media video{width:100%;aspect-ratio:16/10;object-fit:contain;background:#000}
.apps-title{position:absolute;left:16px;top:14px;padding:6px 12px;border-radius:999px;background:rgba(6,9,14,.62);color:#fff;font-size:14px;font-weight:600;backdrop-filter:blur(6px)}
.apps-out{padding:22px 28px 20px;display:flex;flex-direction:column;gap:8px;min-width:0}
.out-head{display:flex;align-items:center;gap:10px}
.out-head-2{margin-top:6px}
.out-badge{font-size:13px;font-weight:750;padding:4px 10px;border-radius:999px;background:var(--cam);color:#fff}
.out-k{font-size:14px;font-weight:650;color:var(--ink-2)}
.out-sub{font-size:13px;color:var(--ink-3)}
.out-quote{font-size:25px;line-height:1.3;font-weight:650;letter-spacing:-.015em;padding:4px 0 4px 18px;border-left:5px solid var(--cam);color:var(--ink);text-wrap:pretty}
.out-quote{font-size:22px;line-height:1.35}
.out-quote mark{background:var(--cam-soft);color:var(--cam);padding:0 4px;border-radius:5px}
.out-move{display:block;margin-top:8px;font-size:16px;font-weight:600;color:var(--ink-2)}
.out-check{margin-top:auto;font-size:14px;line-height:1.45;color:var(--ink-2)}
.out-check .ok{display:inline-grid;place-items:center;width:20px;height:20px;margin-right:4px;border-radius:50%;background:#e7f5ee;color:var(--ok);font-weight:800;font-size:12px}
.out-check i{font-style:normal;font-weight:650;color:var(--ok)}
.out-json{font-family:var(--mono);font-size:13.5px;line-height:1.65;background:#0f1319;color:#e6e8eb;padding:16px 18px;border-radius:14px;overflow:auto;white-space:pre;max-height:260px}
.out-json .k{color:#8fb4ff}
.out-json .v{color:#e6e8eb}
.out-json .hot{color:#ff8b7f;font-weight:700}
.out-json .p{color:#6f7681}
.thumbs-6{grid-template-columns:repeat(6,minmax(0,1fr))}
.thumbs-5{grid-template-columns:repeat(5,minmax(0,1fr))}

/* close */
.close{padding-bottom:40px}
.close-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:24px}

.res-card,.bib-card{padding:30px 32px}
.res-links{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.res-card h3{font-size:18px;margin-bottom:8px}
.res-card p{font-size:16px;line-height:1.6;color:var(--ink-2)}
.bib-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}
.bib-top h3{font-size:18px}
.copy{height:34px;padding:0 14px;border-radius:999px;background:var(--rule-2);font-size:14px;font-weight:600}
.copy:hover{background:var(--rule)}
.bib-card pre{font-family:var(--mono);font-size:14.5px;line-height:1.6;color:var(--ink);background:var(--bg);padding:18px 20px;border-radius:12px;overflow-x:auto}
.close-logos{display:flex;justify-content:center;align-items:center;gap:72px;margin-top:56px}
.foot{max-width:calc(var(--wrap) + 2*var(--gutter));margin:40px auto 0;padding:28px var(--gutter) 48px;border-top:1px solid var(--rule);display:flex;justify-content:space-between;gap:24px;font-size:14px;color:var(--ink-3)}
.foot a{white-space:nowrap}

/* dialogs + full table */
.zoom-dialog{margin:auto;border:0;border-radius:18px;background:#fff;box-shadow:0 30px 80px rgba(0,0,0,.35)}
.zoom-dialog{max-width:min(1400px,94vw);padding:22px}
.zoom-dialog::backdrop{background:rgba(6,9,14,.72)}
.zoom-dialog img{max-height:78vh;width:auto;margin:0 auto}
.zoom-dialog p{margin-top:12px;font-size:15px;color:var(--ink-2)}
.zoom-close{position:absolute;right:12px;top:8px;width:36px;height:36px;font-size:26px;color:var(--ink-2);z-index:2}
.noscript{position:fixed;bottom:0;left:0;right:0;padding:12px;background:#fff;text-align:center}
.rtable{width:100%;border-collapse:collapse;font-size:15px;font-variant-numeric:tabular-nums}
.rtable caption{caption-side:bottom;text-align:left;padding-top:12px;font-size:14px;color:var(--ink-2)}
.rtable th{font-size:13px;font-weight:650;color:var(--ink-3);text-align:right;padding:10px 10px 8px;border-bottom:1.5px solid var(--ink)}
.rtable th:first-child,.rtable td:first-child{text-align:left;padding-left:4px}
.rtable th:nth-child(2),.rtable td:nth-child(2){text-align:left;color:var(--ink-3)}
.rtable td{text-align:right;padding:5px 10px;border-bottom:1px solid var(--rule-2);white-space:nowrap}
.rtable tr.grp td{font-size:13px;font-weight:650;color:var(--ink-3);padding-top:12px;font-style:italic}
.rtable tr.human td{border-top:1.5px solid var(--rule)}
.rtable tr.ours td{background:var(--cam-soft);font-weight:700;border-bottom:0}
.rtable tr.ours td:first-child{border-radius:8px 0 0 8px;color:var(--cam)}
.rtable tr.ours td:last-child{border-radius:0 8px 8px 0}
.rtable td.best{font-weight:750}
.rtable td.second{text-decoration:underline;text-underline-offset:3px}
.tbl-grid>*,.cat-grid>*,.ov-grid>*,.pr-grid>*,.player>*,.apps>*,.close-grid>*,.m-grid>*,.how-grid>*{min-width:0}

/* ================= RESPONSIVE ================= */
@media (max-width:1100px){
  .nav-links a{display:none}
  .tbl-grid,.cat-grid,.ov-grid,.pr-grid,.player,.apps,.close-grid{grid-template-columns:1fr}
  .thumbs,.thumbs-6{grid-template-columns:repeat(4,minmax(0,1fr))}
  .sec-head-row{flex-direction:column;align-items:flex-start;gap:16px}
  .abstract p{column-count:1}
  .demo{grid-template-columns:minmax(0,1.2fr) 70px minmax(0,1fr);grid-template-rows:auto auto;row-gap:12px;--tile-h:150px}
  .hero{height:auto}
  .hero-center{padding-bottom:6px}
  .demo-grid{grid-template-columns:1fr}
  .demo-model{display:none}
  .demo-outs{grid-template-columns:1fr 1fr}
  .tile-text{grid-column:1/3}
  .demo{--tile-h:200px}
}
@media (max-width:760px){
  :root{--gutter:20px}
  body{font-size:16.5px}
  .hero-nav{padding:18px 20px 0;flex-wrap:wrap;row-gap:10px}
  .org-hkust{height:28px} .org-tencent{height:20px} .orgs{gap:16px}
  .nav-present{height:34px;padding:0 12px;font-size:14px}
  .hero-center{padding:16px 20px 4px}
  .wordmark{font-size:60px}
  .paper-title{font-size:20px}
  .authors{font-size:15.5px;gap:2px 14px;margin-top:14px}
  .affils{font-size:12.5px;gap:0 10px}
  .hero-actions{gap:8px}
  .pill{height:42px;padding:0 16px;font-size:15px}
  .demo{margin:16px 14px 0;padding:12px;--tile-h:150px}
  .demo-head{flex-direction:column;align-items:flex-start;gap:8px}
  .demo-title{font-size:16px}
  .demo-live{flex-wrap:wrap;white-space:normal}
  .tile-in{--tile-h:200px}
  .demo-model{display:none}
  .demo-outs{gap:10px}
  .demo-note{margin-left:16px;margin-right:16px}
  .hero-foot{font-size:11.5px}
  .org-rule{height:22px}
  .hero-nav{height:auto;padding:18px 16px 0;flex-wrap:nowrap;gap:10px}
  .orgs{gap:10px;min-width:0} .org-tencent{height:17px} .org-hkust{height:23px}
  .nav-links .nav-present{margin:0;height:32px;padding:0 12px;font-size:13.5px}
  .demo-live{flex-direction:column;align-items:stretch;gap:6px}
  .demo-live .dl{border-radius:12px;flex-wrap:wrap}
  .demo-live .dl small{white-space:nowrap}
  .demo-live .eq{display:none}
  .demo-out .row i{min-width:90px}
  .close-logos .ls-hkust{height:34px} .close-logos .ls-tencent{height:24px}
  .close-logos{gap:28px;flex-wrap:wrap}
  .section{padding-top:84px}
  .section .slide+.slide{margin-top:64px}
  .lede{font-size:17px}
  .fig-card,.fig-wide,.chart-card{padding:16px}
  .chart{min-height:400px}.chart-tall{min-height:420px}.chart-grid{min-height:760px}
  .abstract{padding:24px 20px}.abstract p{font-size:16.5px;text-align:left}
  .how-grid,.m-grid{grid-template-columns:1fr}
  .thumbs,.thumbs-6{grid-template-columns:repeat(3,minmax(0,1fr))}
  .out-quote{font-size:20px}
  .apps-out{padding:18px 18px 20px}
  .foot{flex-direction:column}
  .seg{flex-wrap:wrap;border-radius:14px}.seg button{height:30px;padding:0 10px;font-size:12.5px}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* ================= PRESENTATION (16:9) ================= */
body.present{background:#05070a;overflow:hidden}
body.present .foot,body.present .skip{display:none}
body.present main,body.present .section{padding:0;margin:0}
body.present .slide{display:none}
body.present .slide.on{display:flex;flex-direction:column;position:fixed;left:50%;top:50%;width:1600px;height:900px;max-width:none;margin:0!important;padding:56px 80px 64px;background:var(--bg);transform:translate(-50%,-50%) scale(var(--deck-scale,1));transform-origin:center;overflow:hidden;z-index:10}
body.present .hero.slide.on{padding:0;background:#0a0e15;height:900px;min-height:0}
body.present .hero .nav-links a,body.present .hero .nav-present,body.present .hero-actions{display:none}
body.present .hero-nav{padding:26px 56px 0}
body.present .hero-center{padding-top:14px}
body.present .wordmark{font-size:108px}
body.present .paper-title{font-size:34px}
body.present .authors{font-size:19px;margin-top:14px}
body.present .affils{font-size:15px}
body.present .demo{--tile-h:360px;margin:22px 48px 0}
body.present .demo-note{font-size:13px}
body.present .hero-foot{font-size:13px}
body.present .sec-head{margin-bottom:24px}
body.present h2{font-size:50px;max-width:none}
body.present .lede{font-size:21px;margin-top:10px}
body.present .chart{min-height:0}
body.present [data-step]{transition:opacity .45s ease,transform .45s ease}
body.present [data-step]:not(.shown){opacity:0;transform:translateY(14px);pointer-events:none}
/* overview + abstract */
body.present .ov-grid{flex:1;min-height:0;grid-template-rows:minmax(0,1fr)}
body.present .ov-grid .fig-card{padding:18px 24px}
body.present .ov-grid .fig-card .zoomable{flex:1;min-height:0;display:flex;align-items:center;justify-content:center}
body.present .ov-grid .fig-card img{max-height:100%;width:auto;max-width:100%}
body.present .ov-grid figcaption{display:none}
body.present .ov-grid .chart-card{padding:16px 22px 10px}
body.present .abstract{padding:22px 28px 24px}
body.present .abstract h3{font-size:20px;margin-bottom:8px}
body.present .abstract p{font-size:15px;line-height:1.5}
/* problem */
body.present .cat-grid{flex:1;min-height:0;grid-template-rows:minmax(0,1fr)}
body.present .cat-grid .chart{min-height:0}
body.present .pr-grid{flex:1;min-height:0;grid-template-rows:minmax(0,1fr)}
body.present .pr-grid .fig-card .zoomable{flex:1;min-height:0;display:flex;align-items:center;justify-content:center}
body.present .pr-grid .fig-card img{max-height:100%;width:auto}
body.present .pr-grid figcaption{font-size:15px}
body.present .how{margin:0 0 14px}
body.present .how-item{padding:14px 22px}
body.present .how-item p{font-size:19px}
/* method */
body.present .fig-wide{flex:1;min-height:0}
body.present .fig-wide .zoomable{flex:1;min-height:0;display:flex;align-items:center;justify-content:center}
body.present .fig-wide img{max-height:100%;width:auto}
body.present .fig-wide figcaption{font-size:15.5px;margin-top:10px}
body.present .m-grid{margin-top:18px}
body.present .note-line{margin-top:12px}
/* qualitative */
body.present #examples .sec-head{margin-bottom:16px}
body.present #examples .lede{display:none}
body.present .player{flex:1;min-height:0}
body.present .player-media{align-self:stretch}
body.present .player-media video{aspect-ratio:auto;height:100%}
body.present .player-side{overflow:hidden}
body.present .thumbs{grid-template-columns:repeat(12,minmax(0,1fr));gap:8px;margin-top:12px}
body.present .thumb span{font-size:10.5px;left:6px;right:6px;bottom:4px}
/* results */
body.present .sec-head-row .head-actions{display:none}
body.present .chart-card-wide{flex:1;min-height:0}
body.present .chart-card-wide .chart{flex:1;min-height:0}
/* applications */
body.present .apps{flex:1;min-height:0}
body.present .apps-media{align-self:stretch}
body.present .apps-media video{aspect-ratio:auto;height:100%}
body.present .apps-out{overflow:hidden}
body.present .thumbs-6{grid-template-columns:repeat(6,minmax(0,1fr))}
body.present .thumbs-6 .thumb{aspect-ratio:16/6}
/* close */
body.present .close-logos{margin-top:auto}
/* deck chrome */
.deck-bar{position:fixed;left:50%;bottom:14px;transform:translateX(-50%);z-index:50;display:flex;align-items:center;gap:6px;padding:6px 8px 6px 16px;border-radius:999px;background:rgba(14,16,19,.86);color:#fff;font-size:14px;backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);box-shadow:0 8px 30px rgba(0,0,0,.35);transition:opacity .3s}
.deck-bar.idle{opacity:0}
.deck-bar[hidden]{display:none}
.deck-count{font-variant-numeric:tabular-nums;min-width:52px}
.deck-title{max-width:240px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:rgba(255,255,255,.72);margin:0 8px}
.deck-progress{width:120px;height:4px;border-radius:2px;background:rgba(255,255,255,.2);overflow:hidden;margin-right:6px}
.deck-progress i{display:block;height:100%;width:0;background:#fff}
.deck-bar button{height:34px;min-width:34px;padding:0 12px;border-radius:999px;font-size:14px;font-weight:600;color:#fff}
.deck-bar button:hover{background:rgba(255,255,255,.14)}
#deck-auto[aria-pressed="true"]{background:var(--cam)}

body.present .tbl-card{padding:12px 18px 8px}
body.present .tbl-card .rtable td{padding-top:3px;padding-bottom:3px}
body.present .tbl-card .rtable tr.grp td{padding-top:8px}
body.present .tbl-note{margin-top:8px}

/* single results table + overview in presentation */
body.present .tbl-one{padding:6px 22px 4px}
body.present .tbl-one .rtable{font-size:13.5px;line-height:1.22}
body.present #results .slide:first-child h2{font-size:42px}
body.present #results .slide:first-child .sec-head{margin-bottom:14px}
body.present .tbl-one .rtable td{padding:1.5px 14px}
body.present .tbl-one .rtable th{padding:6px 14px 5px}
body.present .tbl-one .rtable tr.grp td{padding-top:5px;font-size:12px}
body.present #overview .abstract{margin-top:16px}
body.present #overview .abstract p{font-size:14px;line-height:1.48}

/* applications: caption + attributes as CameraVLM output */
.apps-in{position:absolute;left:16px;bottom:14px;padding:4px 10px;border-radius:999px;background:rgba(6,9,14,.62);color:rgba(255,255,255,.85);font-size:12.5px;font-weight:600}
.gen-head{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-bottom:10px;margin-bottom:4px;border-bottom:1px solid var(--rule)}
.gen-head .out-badge{font-size:13.5px;padding:5px 12px}
.gen-sub{font-size:13.5px;color:var(--ink-3)}
.apps-out>.out-k{font-size:12.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin-top:6px}
.apps-out .out-quote{font-size:21px;line-height:1.38;font-weight:600;padding:2px 0 2px 16px}
.attrs{display:grid;grid-template-columns:1fr 1fr;gap:6px 10px}
.attr{padding:7px 11px;border-radius:10px;background:var(--rule-2);min-width:0}
.attr dt{font-size:11.5px;font-weight:650;color:var(--ink-3);text-transform:uppercase;letter-spacing:.04em}
.attr dd{font-size:15px;font-weight:650;color:var(--ink);display:flex;align-items:center;gap:6px}
.attr.hot{grid-column:1/-1;background:var(--cam-soft)}
.attr.hot dd{font-size:18px;color:var(--cam)}
.ok{display:inline-grid;place-items:center;width:18px;height:18px;border-radius:50%;background:#dff3e8;color:var(--ok);font-weight:800;font-size:11px;flex:none}
.out-check{margin-top:6px;font-size:13.5px;color:var(--ink-3);display:flex;align-items:center;gap:6px}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.pair-card{overflow:hidden;display:flex;flex-direction:column}
.pair-media{position:relative;background:#000}
.pair-media video{width:100%;aspect-ratio:2.4/1;object-fit:cover;display:block}
.pair-out{padding:16px 22px 20px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.pair-label{font-size:15px;color:var(--ink-2);display:flex;align-items:center;gap:8px}
.pair-label b{font-size:19px;color:var(--cam)}
.pair-desc{font-size:16px;line-height:1.5;color:var(--ink);text-wrap:pretty}
.pair-note{margin-top:16px;font-size:16px;color:var(--ink-2)}
@media (max-width:760px){.attrs{grid-template-columns:1fr}.pair{grid-template-columns:1fr}.thumbs-5{grid-template-columns:repeat(3,minmax(0,1fr))}}
body.present .thumbs-5{grid-template-columns:repeat(5,minmax(0,1fr))}
body.present .thumbs-5 .thumb{aspect-ratio:16/6}
body.present .apps-out .out-quote{font-size:19px}
body.present .pair{flex:1;min-height:0}
/* hero demo: tile labels carry the on/off screen meaning */
.tile-k em{font-style:normal;font-size:11px;font-weight:650;padding:2px 7px;border-radius:999px;background:rgba(255,255,255,.16);margin-left:2px}
.tile-k.k-ours{background:var(--cam);color:#fff}
.tile-k.k-ours b{color:var(--cam)}
.demo-out .gen{font-weight:600}
body.present .pair-card{min-height:0}
body.present .pair-media{flex:1;min-height:0}
body.present .pair-media video{height:100%;aspect-ratio:auto}
.deck-bar button{white-space:nowrap}

.demo-out .ours{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin:8px 0 6px;font-size:14px}
.demo-out .ours .badge{font-size:11px;font-weight:750;letter-spacing:.02em;padding:3px 9px;border-radius:999px;background:var(--cam);color:#fff}
.demo-out .ours b{color:#7cf0b2;font-weight:700}
.demo-out .ours .dots{color:rgba(255,255,255,.5)}
.demo-out .cap{border-bottom:0;padding-bottom:6px;margin-bottom:6px}

.thumbs-4{grid-template-columns:repeat(4,minmax(0,1fr))}
body.present .thumbs-4{grid-template-columns:repeat(4,minmax(0,1fr))}
body.present .thumbs-4 .thumb{aspect-ratio:16/5}
.demo-out .cap{font-size:13px;line-height:1.36}
.demo-out .row{line-height:1.42}
.demo-out .q{margin-bottom:4px}
.hero .hero-actions.res-links{margin-bottom:0}

.demo-out .gen mark{background:rgba(255,84,70,.22);color:#ffb3aa;padding:0 3px;border-radius:4px;font-weight:700}
.apps-out .out-quote mark{background:var(--cam-soft);color:var(--cam);padding:0 4px;border-radius:5px;font-weight:700}

.pair-out .out-k{font-size:12px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin-top:4px}
.pair-desc{font-size:16.5px;line-height:1.5;font-weight:550;padding-left:14px;border-left:4px solid var(--cam)}
.pair-desc mark{background:var(--cam-soft);color:var(--cam);padding:0 3px;border-radius:4px;font-weight:650}
.attrs-3{grid-template-columns:repeat(3,minmax(0,1fr));width:100%}
.attrs-3 .attr dd{font-size:14px}
@media (max-width:760px){.attrs-3{grid-template-columns:1fr 1fr}}
body.present .pair-desc{font-size:14.5px;line-height:1.42}
body.present .pair-out{padding:12px 18px 14px;gap:5px}
body.present .attrs-3 .attr{padding:5px 9px}

#deck-full svg{display:block}
/* narrow screens: table scrolls sideways with the model column pinned; tile badges wrap; BibTeX wraps */
@media (max-width:760px){
  .tbl-one{padding:6px 0 10px}
  .tbl-one .rtable{font-size:14px}
  .tbl-one .rtable td,.tbl-one .rtable th{padding:4px 10px}
  .tbl-one .rtable td:first-child,.tbl-one .rtable th:first-child{position:sticky;left:0;z-index:1;background:#fff;box-shadow:1px 0 0 var(--rule)}
  .tbl-one .rtable tr.ours td:first-child{background:var(--cam-soft)}
  .tbl-one .rtable tr.grp td:first-child{background:#fff}
  .tbl-hint{display:block;margin-top:8px;font-size:13px;color:var(--ink-3);text-align:right}
  .tile-k{white-space:normal;flex-wrap:wrap;max-width:calc(100% - 20px);row-gap:3px}
  .bib-card pre{white-space:pre-wrap;word-break:break-word;font-size:12.5px;padding:14px}
}

/* slides: the short abstract keeps the overview slide readable */
body.present .abs-seg{display:none}
body.present .abstract .abs-full{display:none}
body.present .abstract .abs-short{display:block;font-size:16px;line-height:1.5}
body.present .how-item{padding:12px 20px}
body.present .how-item p{font-size:17px}
body.present .how-no{width:32px;height:32px;font-size:16px}
body.present #overview .abstract .abs-short{font-size:17px;line-height:1.5}
body.present .how-k{display:none}
body.present #method .fig-wide figcaption{display:none}

@media (max-width:760px){
  .org-poly{height:26px} .org-ipp{height:18px} .org-x{gap:7px} .org-rule-in{height:16px} .orgs img.org-mark{height:20px} .org-tc{gap:6px}
}
@media (max-width:480px){
  .orgs{gap:7px} .org-poly{height:21px} .org-ipp{height:15px} .org-x{gap:5px} .org-rule-in{height:13px} .orgs img.org-mark{height:16px} .org-tc{gap:4px} .org-tencent{height:14px} .org-hkust{height:19px} .org-rule{height:18px}
  .hero-nav{gap:6px} .nav-links .nav-present{padding:0 10px;font-size:12.5px}
}
@media (max-width:480px){
  .hero-nav{padding-left:12px;padding-right:12px}
  .orgs{gap:6px;flex:none} .orgs img{flex:none}
  .orgs img.org-mark{height:12px} .org-tc{gap:3px} .org-tencent{height:12px} .org-hkust{height:16px}
  .org-poly{height:18px} .org-ipp{height:12px} .org-x{gap:4px} .org-rule{height:15px} .org-rule-in{height:11px}
  .nav-links .nav-present{height:30px;padding:0 9px;font-size:12px}
}

/* The colorful mark identifies Tencent Video Solar System. */
.org-solar{display:flex;align-items:center;gap:8px}
.org-solar-name{color:#fff;font-size:13px;font-weight:600;line-height:1.2;white-space:nowrap}
.org-tc{gap:18px}
@media (max-width:760px){
  .hero-nav{flex-wrap:wrap;justify-content:center;row-gap:12px}
  .orgs{flex-wrap:wrap;justify-content:center;gap:12px;width:100%;flex:auto}
  .org-tc{gap:10px}
  .org-solar{gap:6px}
  .org-solar-name{font-size:11px}
  .orgs img.org-mark{height:22px}
}
.orgs,.org-tc,.org-solar,.org-x{flex-shrink:0}
@media (max-width:1400px){.nav-links a{display:none}}

@font-face{font-family:"Solar Condensed";src:url("../assets/fonts/BarlowCondensed-SemiBold.ttf") format("truetype");font-weight:600;font-style:normal;font-display:swap}
.org-solar-name{font-family:"Solar Condensed","Arial Narrow",sans-serif;font-size:17px;font-weight:600;line-height:1.05;letter-spacing:.35px}
@media(max-width:760px){.org-solar-name{font-size:14px;letter-spacing:.25px}}