:root{--bg:#f7f8f4;--paper:#fff;--ink:#213a33;--muted:#737e76;--line:#dce2d8;--green:#1b5443;--lime:#dcf4a6;--soft:#edf3e7;--orange:#bb754c;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:var(--bg);font-synthesis:none}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;font-size:15px;line-height:1.65}a{color:inherit;text-decoration:none}button,input,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button,select{color:var(--ink)}a:focus-visible,button:focus-visible,select:focus-visible,input:focus-visible{outline:3px solid #709342;outline-offset:4px}button:disabled{opacity:.4;cursor:default}.container{width:min(1400px,calc(100% - 96px));margin-inline:auto}.site-header{height:76px;padding:0 48px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);background:var(--bg)}.wordmark{display:flex;align-items:center;gap:12px;font-weight:750;letter-spacing:-.5px;font-size:20px}.site-header nav{display:flex;gap:30px;font-size:13px;font-weight:550}.site-header nav a:hover{color:var(--green)}.nav-dot,.status-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#789f46;margin-left:5px;vertical-align:middle}.status-dot{margin:0 8px 0 0}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--muted)}.hero{text-align:center;padding:65px 0 45px}.hero h1{font-size:clamp(52px,6.5vw,88px);line-height:1.08;letter-spacing:-5px;font-weight:750;margin:22px 0 15px}.hero h1 span{color:#4d7451}.hero h2{font-size:clamp(23px,2.5vw,35px);line-height:1.4;letter-spacing:-1.2px;font-weight:500;margin:0}.hero-summary{color:var(--muted);font-size:16px;line-height:1.8;margin:23px auto 22px}.authors{font-size:15px;margin:0;line-height:2.2;color:#4f6057}.authors span{margin:0 7px;color:#a0ab9e}.affiliation{font-size:15px;color:var(--muted);margin:2px 0 24px}.hero-actions{display:flex;justify-content:center;gap:10px}.button{display:inline-flex;align-items:center;gap:24px;padding:11px 21px;border-radius:7px;font-size:13px;font-weight:600;border:1px solid var(--line);transition:.15s}.button.primary{background:var(--green);color:#fff;border-color:var(--green)}.button.primary:hover{background:#2c6b57}.button.secondary{background:var(--paper)}.button.secondary:hover{background:var(--soft)}.teaser{padding:26px 28px 17px;border-radius:16px;background:var(--paper);border:1px solid var(--line);box-shadow:0 12px 40px #20392b06}.teaser-heading{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-bottom:17px}.teaser-heading h3{font-size:19px;font-weight:500;margin:4px 0 0;letter-spacing:-.4px}.small-button{border:1px solid var(--line);background:var(--paper);border-radius:6px;padding:7px 11px;font-size:11px;white-space:nowrap}.small-button:hover{background:var(--soft);border-color:#a9b7a1}.hero-media{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.hero-media .video-card .video-topline{font-size:12px}.teaser-caption{display:flex;justify-content:space-between;gap:14px;margin-top:16px;color:var(--muted);font-size:11px}.teaser-caption a{color:var(--green);white-space:nowrap}.section-heading{display:grid;grid-template-columns:240px 1fr;gap:40px;margin-bottom:32px}.section-index{font-size:10px;letter-spacing:1.6px;font-weight:700;padding-top:12px;color:var(--muted)}.section-heading h2{font-size:clamp(28px,3vw,42px);font-weight:500;line-height:1.22;letter-spacing:-1.8px;margin:0 0 19px}.section-heading p{color:var(--muted);max-width:730px;font-size:15px;margin:0;line-height:1.8}.method-section{padding-top:95px}.principles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px;margin-bottom:32px}.principles article{border-top:1px solid #bfc9b8;padding:22px 10px 0 0}.step-number{font-family:ui-monospace,monospace;font-size:12px;color:#78936a}.principles h3{font-size:18px;font-weight:550;letter-spacing:-.4px;margin:10px 0}.principles p{font-size:13px;color:var(--muted);line-height:1.8;margin:0}.method-figure{margin:0;background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden}.method-figure img{width:100%;display:block;padding:25px 28px}.method-figure figcaption{border-top:1px solid var(--line);padding:17px 28px;font-size:12px;color:var(--muted);line-height:1.7}.method-figure figcaption strong{color:var(--ink)}.inference{display:flex;gap:25px;align-items:center;justify-content:space-between;padding:26px 0;border-bottom:1px solid var(--line)}.inference h3{font-size:16px;font-weight:500;letter-spacing:-.3px;margin:4px 0}.inference-flow{display:flex;align-items:center;gap:20px}.inference-flow>div{font-size:12px;font-weight:600;padding:10px 16px;border:1px solid var(--line);border-radius:6px;background:#fff}.inference-flow small{font-size:10px;font-weight:400;color:var(--muted)}.inference-flow>span{color:#a0b08c}.inference-flow .sim-step{background:#edf3e4}.inference-flow .real-step{background:#dfeccc;border-color:#c4d5b3}.results-section{padding-top:95px}.comparison-grid{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:9px}.video-card{min-width:0}.video-topline{display:flex;align-items:center;justify-content:space-between;gap:3px;font-size:10px;padding:0 0 8px;color:#657468;min-height:24px}.video-topline strong{font-weight:550;white-space:nowrap}.video-card[data-track=simulation] .video-topline,.video-card[data-track=real] .video-topline{color:var(--green)}.video-card[data-track=gt] .video-topline{color:#526e69}.video-badge{font-size:8px;text-transform:uppercase;letter-spacing:.6px;padding:1px 4px;background:var(--soft);border-radius:3px}.video-card[data-track=simulation] .video-badge,.video-card[data-track=real] .video-badge{background:var(--lime);color:#436132}.media-frame{aspect-ratio:320/224;position:relative;border-radius:5px;overflow:hidden;background:#edf0e9;border:1px solid #e5e9e0}.media-frame video{width:100%;height:100%;object-fit:contain;display:block}.media-frame .inspect{position:absolute;inset:0;border:0;background:transparent;border-radius:0;padding:0}.inspect>span{position:absolute;right:6px;bottom:6px;background:#ffffffdc;color:#183d34;border-radius:4px;padding:1px 6px;font-size:13px;opacity:0;transition:.15s}.inspect:hover>span,.inspect:focus-visible>span{opacity:1}.inspect:focus-visible{outline-offset:-4px}.video-card[data-track=simulation] .media-frame,.video-card[data-track=real] .media-frame{border-color:#b7c9a1}.video-error{position:absolute;inset:0;display:grid;place-items:center;text-align:center;padding:12px;color:#7e4028;background:#faf1e8;font-size:11px;z-index:1}footer{border-top:1px solid var(--line);padding:30px 0 42px;display:flex;align-items:center;justify-content:space-between;gap:25px}footer .wordmark{font-size:16px}.footer-tag{font-size:11px;font-weight:400;color:var(--muted);letter-spacing:0;margin-left:14px}footer>a:last-child{font-size:11px;color:var(--muted)}dialog{width:min(800px,94vw);padding:22px;max-height:94vh;overflow:auto;border:1px solid var(--line);border-radius:12px;background:var(--bg);color:var(--ink)}dialog::backdrop{background:#10231dd9;backdrop-filter:blur(6px)}.dialog-head{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:14px}.dialog-head h2{font-size:19px;line-height:1.4;margin:4px 0}#inspectVideo{display:block;width:100%;max-height:65vh;aspect-ratio:320/224;object-fit:contain;border-radius:6px;background:#e9eee3}#dialogInstruction{font-size:13px;color:var(--muted);margin:15px 0 6px}.download-link{font-size:12px;color:var(--green)}#notice{position:fixed;bottom:22px;left:50%;transform:translateX(-50%);background:var(--green);color:white;border-radius:8px;padding:10px 18px;font-size:12px;z-index:10;display:none}#notice.visible{display:block}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}.skip-link{position:absolute;top:-100px;left:20px;background:var(--green);color:white;padding:8px 18px;z-index:20}.skip-link:focus{top:10px}.loading-note{padding:30px;color:var(--muted)}@media(min-width:1650px){.video-topline{font-size:12px}.video-badge{font-size:9px}}@media(max-width:1150px){.container{width:calc(100% - 56px)}.site-header{padding:0 28px}.section-heading{grid-template-columns:180px 1fr;gap:30px}.inference-flow{gap:10px}.inference-flow>div{padding:8px 10px;font-size:11px}.comparison-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:17px 12px}.video-topline{font-size:12px}.hero{padding-top:48px}.authors{font-size:14px}.authors span{margin:0 4px}}@media(max-width:720px){.container{width:calc(100% - 32px)}.site-header{height:64px;padding:0 17px}.wordmark{font-size:17px;gap:9px}.site-header nav{gap:16px;font-size:11px}.hero{padding:42px 0 30px}.hero h1{letter-spacing:-3px;margin-top:18px}.hero h2{font-size:23px;letter-spacing:-.8px}.desktop-break{display:none}.hero-summary{font-size:13px;margin:18px 0}.hero-summary br{display:none}.authors{max-width:340px;margin:auto;font-size:13px}.affiliation{font-size:13px;margin:9px 0 20px}.eyebrow{font-size:8px;letter-spacing:1.4px}.button{font-size:12px;padding:10px 15px;gap:14px}.teaser{padding:18px 14px 14px}.teaser-heading h3{font-size:15px;max-width:230px}.hero-media{gap:8px}.hero-media .video-card .video-topline{font-size:9px}.hero-media .video-badge{display:none}.hero-media .media-frame{border-radius:4px}.teaser-caption{font-size:9px;display:block}.teaser-caption a{display:block;margin-top:5px}.section-heading{display:block;margin-bottom:25px}.section-index{font-size:9px;padding:0;margin-bottom:18px}.section-heading h2{font-size:32px;letter-spacing:-1px;margin-bottom:15px}.section-heading p{font-size:13px}.method-section,.results-section{padding-top:60px}.principles{grid-template-columns:1fr;gap:22px}.principles article{padding-top:14px}.principles h3{font-size:17px;margin:6px 0}.principles p{font-size:12px}.step-number{font-size:10px}.method-figure img{padding:10px}.method-figure figcaption{padding:12px;font-size:10px}.inference{display:block;padding:20px 0}.inference h3{font-size:15px}.inference-flow{margin-top:16px;gap:6px;justify-content:space-between}.inference-flow>div{font-size:9px;padding:8px 6px;line-height:1.5}.inference-flow small{font-size:8px}.inference-flow>span{font-size:10px}.comparison-grid{gap:12px 7px}.video-topline{font-size:8px;min-height:23px;display:block;padding-bottom:5px;line-height:1.5}.video-topline strong{white-space:normal}.video-badge{display:none}.inspect>span{font-size:10px;right:3px;bottom:3px}footer{padding:22px 0 30px}footer .wordmark{display:block;font-size:14px}.footer-tag{display:block;margin:4px 0 0;font-size:9px}footer>a:last-child{white-space:nowrap;font-size:10px}dialog{padding:14px}.dialog-head h2{font-size:16px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

.gallery{margin:0 0 42px;padding:26px 24px 15px;background:var(--paper);border:1px solid var(--line);border-radius:14px;scroll-margin-top:35px}
.gallery-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:15px}
.gallery-heading h3{font-size:25px;letter-spacing:-.7px;font-weight:550;margin:0}
.gallery-navigation{display:flex;align-items:center;gap:9px}
.gallery-navigation button{display:grid;place-items:center;width:36px;height:36px;border:1px solid var(--line);border-radius:50%;background:var(--paper);font-size:19px;line-height:1;transition:background .15s,border-color .15s}
.gallery-navigation button:hover{background:var(--soft);border-color:#a9b7a1}
.gallery-navigation .gallery-play{font-size:12px;color:var(--muted);width:30px;height:30px;border-color:transparent}
.gallery-instruction{font-size:15px;line-height:1.5;min-height:23px;font-weight:400;color:var(--muted);margin:0 0 22px}
.gallery-stage{touch-action:pan-y;overflow:hidden}
.gallery-dots{display:flex;align-items:center;justify-content:center;gap:2px;padding:18px 0 0}
.gallery-dot{display:grid;place-items:center;width:23px;height:23px;padding:0;border:0;border-radius:50%;background:transparent}
.gallery-dot span{display:block;width:5px;height:5px;background:#ced7c8;border-radius:50%;transition:background .15s,transform .15s}
.gallery-dot:hover span{background:#7f9774}
.gallery-dot[aria-current=true] span{background:var(--green);transform:scale(1.4)}
.dialog-actions{display:flex;gap:8px;align-items:center}
@media(max-width:720px){.gallery{padding:18px 13px 10px;margin-bottom:25px;scroll-margin-top:20px}.gallery-heading{margin-bottom:11px}.gallery-heading h3{font-size:21px}.gallery-navigation{gap:6px}.gallery-navigation button{width:32px;height:32px;font-size:17px}.gallery-navigation .gallery-play{width:26px;height:26px;font-size:11px}.gallery-instruction{font-size:12px;min-height:36px;margin-bottom:16px}.gallery-dots{padding-top:13px;gap:0}.gallery-dot{width:22px;height:24px}}

.pku-logo{display:block;width:38px;height:38px;object-fit:contain;flex-shrink:0}@media(max-width:720px){.pku-logo{width:32px;height:32px}}

.authors a{text-decoration:underline;text-decoration-color:#a7b7a0;text-underline-offset:3px}.authors a:hover{color:var(--green);text-decoration-color:currentColor}

.paper-teaser{max-width:860px;margin-block:0 28px;background:var(--paper);border:1px solid var(--line);border-radius:12px;overflow:hidden}.paper-teaser>a{display:block}.paper-teaser img{display:block;width:100%;height:auto;padding:12px 16px}.paper-teaser figcaption{border-top:1px solid var(--line);padding:10px 16px;font-size:12px;line-height:1.7;color:var(--muted)}.paper-teaser figcaption strong{color:var(--ink)}@media(max-width:720px){.paper-teaser{margin-bottom:24px}.paper-teaser img{padding:10px}.paper-teaser figcaption{padding:12px;font-size:11px}}

/* Compact paper teaser. */
figure.paper-teaser.container{width:min(640px,calc(100% - 32px));max-width:640px;margin:0 auto 24px;border:0;border-radius:0;background:transparent;box-shadow:none}figure.paper-teaser.container img{padding:0;width:100%;height:auto}figure.paper-teaser.container figcaption{border:0;padding:8px 4px 0;font-size:11px;line-height:1.5;text-align:center}