:root{--ink:#172e2a;--text:#50645f;--accent:#167b69;--line:#dfe8e3;--soft:#f5f8f6}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:90px}body{margin:0;background:white;color:var(--ink);font:16px/1.65 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif}a{color:inherit;text-decoration:none}button,input{font:inherit}button,a,input{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #299e85;outline-offset:5px}button{cursor:pointer}.wrap{width:min(1120px,calc(100% - 64px));margin:auto}.nav{position:sticky;top:0;z-index:10;border-bottom:1px solid #e8eeea;background:#ffffffF5;backdrop-filter:blur(12px)}.nav-inner{max-width:1280px;margin:auto;min-height:72px;padding:0 32px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-size:18px;font-weight:750;letter-spacing:-.6px;white-space:nowrap}.brand-mark{color:var(--accent);font-size:27px;vertical-align:-2px;margin-right:5px}nav{display:flex;gap:30px;font-size:13px;font-weight:550;color:var(--text)}nav a:hover,.text-link:hover{color:var(--accent)}.hero{text-align:center;padding-top:78px;padding-bottom:80px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:750;color:var(--accent);margin:0 0 20px}h1{font-size:clamp(28px,3.65vw,48px);letter-spacing:-1.7px;line-height:1.22;margin:0;font-weight:650}h1>span{color:var(--accent);font-weight:800;display:inline-block;margin-bottom:12px;font-size:1.25em;letter-spacing:-2.5px}.hero-actions{display:flex;justify-content:center;gap:12px;margin:27px 0 46px}.button{padding:10px 20px;border-radius:7px;font-size:13px;font-weight:650;display:inline-flex;gap:24px;align-items:center}.primary{background:var(--accent);color:white}.primary:hover{background:#105d50}.secondary{border:1px solid var(--line);background:white}.secondary:hover{background:var(--soft)}.hero-visual{padding:20px;border:1px solid var(--line);border-radius:14px;background:#fafcfb;box-shadow:0 16px 48px #193c2e09}.visual-heading{display:flex;justify-content:space-between;gap:16px;font-size:12px;font-weight:600;text-align:left;margin:0 0 14px}.subtle{color:#74857f;font-weight:400}.hero-pair{display:grid;grid-template-columns:1fr 1fr;gap:16px}.hero-pair figure{margin:0;position:relative;overflow:hidden;border-radius:7px;background:#15201b}.hero-pair img{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:cover}.hero-pair figcaption{position:absolute;bottom:12px;left:12px;font-size:11px;font-weight:600;background:#fffef4eb;padding:4px 10px;border-radius:4px}.legend{display:flex;align-items:center;justify-content:center;gap:20px;font-size:11px;color:#64756e;padding:16px 0 0;flex-wrap:wrap}.legend span{display:inline-flex;align-items:center;gap:6px}.legend i{width:9px;height:9px;border-radius:2px;display:inline-block}.legend-intro{font-weight:650;color:#445c52}.step1{background:#1f964e}.step2{background:#297ed3}.step3{background:#d58b17}.step4{background:#d74141}.overview{padding:76px 0;background:var(--soft);border-block:1px solid #edf1ee}.section-intro{max-width:740px;margin:auto;text-align:center}h2{font-size:34px;line-height:1.25;letter-spacing:-1px;font-weight:650;margin:0 0 20px}.section-intro p:not(.eyebrow){color:var(--text);font-size:15px}.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:32px;margin-top:48px}.principles article{border-top:1px solid #cddbd2;padding-top:20px}.number{color:#79a390;font-size:12px;font-weight:650}.principles h3{font-size:17px;margin:10px 0 9px;letter-spacing:-.3px}.principles p{color:var(--text);font-size:13px;margin:0}.results{padding-top:80px;padding-bottom:80px}.section-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.section-heading .eyebrow{margin-bottom:12px}.section-heading h2{margin:0}.count{color:var(--accent);background:#edf5ef;border:1px solid #d7e6dc;border-radius:30px;padding:5px 13px;font-size:11px;white-space:nowrap}.section-description{color:var(--text);max-width:720px;font-size:15px;margin:18px 0 34px}.gallery{display:grid;grid-template-columns:1fr 1fr;gap:24px}.example{border:1px solid var(--line);border-radius:10px;padding:18px;background:white;min-width:0;box-shadow:0 4px 14px #15342b03}.card-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;gap:10px}.card-heading h3{font-size:16px;font-weight:650;letter-spacing:-.3px;margin:0}.sample-id{color:#87968e;font-size:10px;letter-spacing:.4px}.video-pair{display:grid;grid-template-columns:1fr 1fr;gap:10px}.video-pair figure{margin:0;min-width:0}.video-pair figcaption{font-size:11px;color:#64746e;margin-bottom:6px;font-weight:550}.video-pair video{display:block;width:100%;aspect-ratio:16/9;object-fit:contain;background:#f0f4f1;border-radius:5px}.controls{display:flex;align-items:center;gap:10px;margin-top:14px;min-height:30px}.play-toggle,.restart{border:1px solid var(--line);border-radius:5px;background:white;color:var(--ink);font-size:11px;height:29px;padding:0 10px;white-space:nowrap}.play-toggle:hover,.restart:hover{background:var(--soft)}.seek{flex:1;min-width:20px;accent-color:var(--accent);height:4px;cursor:pointer}.time{font-variant-numeric:tabular-nums;font-size:10px;color:#748179;white-space:nowrap;min-width:55px}.example .legend{justify-content:flex-start;gap:14px;padding-top:13px;font-size:10px}.card-description{color:#79857f;font-size:11px;line-height:1.55;margin:14px 0 0;min-height:34px}.media-status{font-size:12px;color:#b03d31;margin:8px 0 0}.world-section{background:#f7f9f7;border-block:1px solid #edf1ee}.closing{text-align:center;padding-top:80px;padding-bottom:76px}.closing p:not(.eyebrow){color:var(--text);font-size:14px;max-width:640px;margin:0 auto 24px}.text-link{font-size:13px;color:var(--accent);font-weight:650}footer{border-top:1px solid var(--line);padding:25px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:24px}.footer-inner .brand{font-size:14px}.footer-inner p{color:#829087;font-size:10px;max-width:400px;line-height:1.5;margin:0}.footer-inner>a:last-child{font-size:11px;color:#607b6d}.skip{position:fixed;top:-80px;left:12px;z-index:99;background:var(--ink);color:white;padding:10px}.skip:focus{top:8px}.noscript{padding:24px;text-align:center}
@media(min-width:1100px){.world-section .example:last-child{grid-column:1/-1;width:calc(50% - 12px);justify-self:center}}
@media(max-width:800px){.wrap{width:calc(100% - 40px)}.nav-inner{padding:0 20px;min-height:64px;gap:12px}nav{gap:15px;font-size:11px}.brand{font-size:16px}.hero{padding-top:50px;padding-bottom:48px}h1{letter-spacing:-1px}.hero-visual{padding:12px}.visual-heading .subtle{display:none}.hero-pair{gap:10px}.hero-pair figcaption{font-size:9px;left:7px;bottom:7px;padding:3px 6px}.gallery{grid-template-columns:1fr}.overview,.results{padding-block:50px}h2{font-size:29px}.principles{gap:20px}.principles h3{font-size:15px}.closing{padding-block:50px}.footer-inner{flex-wrap:wrap}.legend{gap:12px}}
@media(max-width:500px){.nav-inner{align-items:flex-start;flex-direction:column;gap:0;padding-block:8px}nav{justify-content:space-between;width:100%;font-size:10px;gap:10px}.brand-mark{font-size:21px}.hero{padding-top:36px}.eyebrow{font-size:9px;letter-spacing:1.4px}h1{font-size:27px;line-height:1.25}.desktop-break{display:none}.hero-actions{margin:22px 0 30px;gap:8px}.button{font-size:11px;gap:12px;padding:10px 13px}.hero-visual{padding:10px}.visual-heading{font-size:10px}.hero-pair{gap:7px}.hero-pair figcaption{position:static;border-radius:0;font-size:9px;background:#f4f7f4}.legend-intro{display:none!important}.legend{font-size:9px;gap:12px}.section-heading{align-items:flex-start;gap:10px}h2{font-size:26px}.count{font-size:9px;padding:4px 9px;margin-top:25px}.section-description{font-size:13px}.principles{grid-template-columns:1fr;gap:24px;margin-top:32px}.principles p{font-size:13px}.example{padding:13px}.card-heading h3{font-size:15px}.video-pair{gap:7px}.video-pair figcaption{font-size:10px}.controls{gap:7px}.restart{padding:0 6px;font-size:10px}.play-toggle{padding:0 8px}.example .legend{gap:12px}.footer-inner{gap:12px}.footer-inner p{width:100%;order:3}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.authors{display:flex;justify-content:center;flex-wrap:wrap;gap:8px 22px;margin:30px auto 16px;font-size:20px;line-height:1.6;color:var(--ink)}.authors span{white-space:nowrap}.authors sup,.affiliations sup{font-size:.65em;vertical-align:super;line-height:0;margin-left:2px;color:var(--accent)}.affiliations{color:var(--text);font-size:15px;line-height:1.7}.affiliations p{margin:3px 0}.affiliations sup{margin-right:3px}
@media(max-width:800px){.authors{font-size:18px;gap:6px 18px}.affiliations{font-size:13px}}
@media(max-width:500px){.authors{font-size:16px;gap:5px 16px;margin-top:24px}.affiliations{font-size:12px;line-height:1.7}}

/* Each sample compares synchronized preview and exit-map videos. */
.results.wrap,.world-section>.wrap{width:min(1360px,calc(100% - 64px))}
.gallery{grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin-top:30px}
.world-section .example:last-child{grid-column:auto;width:100%;justify-self:stretch}
.example{padding:12px}
.example-comparison{position:relative;aspect-ratio:16/9;overflow:hidden;border-radius:6px;background:#f0f4f1;isolation:isolate}
.example-comparison video{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;display:block}
.comparison-overlay{clip-path:inset(0 0 0 var(--split));z-index:1}
.comparison-label{position:absolute;top:8px;z-index:2;padding:2px 7px;border-radius:4px;background:#ffffffdf;color:#29453b;font-size:10px;font-weight:650;pointer-events:none}
.preview-label{left:8px}.exitmap-label{right:8px}
.comparison-divider{position:absolute;top:0;bottom:0;left:var(--split);width:2px;transform:translateX(-50%);background:white;z-index:3;pointer-events:none;box-shadow:0 0 3px #0005}
.comparison-divider>span{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:white;color:#29453b;font-size:20px;line-height:1;box-shadow:0 1px 6px #0003;white-space:pre}
.comparison-slider{position:absolute;inset:0;width:100%;height:100%;margin:0;opacity:0;z-index:4;cursor:ew-resize;touch-action:pan-y}
.example-comparison:has(.comparison-slider:focus-visible){outline:3px solid #299e85;outline-offset:3px}
.comparison-legend{display:flex;justify-content:center;margin-top:9px}
.schedule-legend{display:inline-flex;align-items:center;gap:10px;font-size:10px;font-weight:400;color:#64756e}
.schedule-legend>span{display:inline-flex;align-items:center;gap:4px;white-space:nowrap}
.schedule-legend i{display:inline-block;width:8px;height:8px;border-radius:1px;flex-shrink:0}
.controls{margin-top:10px;gap:7px}.play-toggle,.restart{height:30px;font-size:10px;padding:0 7px}.time{font-size:10px;min-width:56px}
@media(max-width:999px){.gallery{grid-template-columns:repeat(2,minmax(0,1fr))}.results.wrap,.world-section>.wrap{width:calc(100% - 40px)}}
@media(max-width:649px){.gallery{grid-template-columns:1fr}.controls{gap:7px}}

.camera-controller{width:224px;margin:18px auto 0;line-height:0}.camera-controller svg{width:100%;height:auto}.camera-key rect{fill:#f7fafc;stroke:#9db1bd;stroke-width:1}.camera-key text{font:14px ui-monospace,monospace;fill:#263d44}.camera-key.active rect{fill:#008d91;stroke:#008d91}.camera-key.active text{fill:white}@media(max-width:500px){.camera-controller{width:192px;margin-top:14px}}

/* Give the paper heading and affiliations the full page width. */
.hero.wrap{width:min(1360px,calc(100% - 64px))}
.hero h1{text-wrap:balance}.hero h1>span{display:inline;font-size:1em;letter-spacing:inherit;margin:0}
.hero .affiliations{display:flex;justify-content:center;align-items:baseline;flex-wrap:wrap;gap:6px 24px}
.hero .affiliations p{margin:0}.hero-visual{max-width:1120px;margin-inline:auto}
@media(max-width:800px){.hero.wrap{width:calc(100% - 40px)}.hero .affiliations{gap:6px 18px}}

/* Looping prompt → frozen generator + router → patch denoising diagram. */
.method-card{position:relative;max-width:1360px;margin:46px auto 0;padding:46px 30px 54px;border:1px solid var(--line);border-radius:18px;background:linear-gradient(135deg,#fafcfb,#fff);box-shadow:0 12px 40px #193c2e05;scroll-margin-top:100px}
.method-flow{display:grid;grid-template-columns:minmax(180px,1fr) 58px minmax(230px,1.12fr) 58px minmax(280px,1.45fr);gap:15px;align-items:center;text-align:left}
.prompt-stage,.output-stage{position:relative;min-width:0}.stage-label{position:absolute;left:0;top:-30px;color:#6b7e75;font-size:12px;font-weight:600;letter-spacing:.2px}
.prompt-box{min-height:166px;display:flex;align-items:center;padding:22px;border:1px dashed #a6b8ae;border-radius:12px;background:#fff;box-shadow:0 3px 0 #e9efea}
.prompt-box p{margin:0;color:#3f574b;font-size:15px;line-height:1.8}.typing-cursor{display:inline-block;width:2px;height:1.1em;background:var(--accent);margin-left:3px;vertical-align:-2px;animation:cursor-blink .7s steps(1) infinite}
.model-stage{display:grid;grid-template-columns:1fr 1.08fr;align-items:center;isolation:isolate;min-height:166px}
.existing-module,.router-module{height:144px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;font-size:15px;font-weight:600;line-height:1.65;padding:12px}
.existing-module{position:relative;background:#eef3f6;border:1px solid #a9bbc5;border-radius:12px 0 0 12px;color:#405361;z-index:1}
.existing-module:after{content:'';position:absolute;right:-12px;top:calc(50% - 12px);width:23px;height:24px;border:1px solid #a9bbc5;border-left:0;border-radius:0 50% 50% 0;background:#eef3f6}
.router-module{border:1px solid #d56870;background:#fff6f6;border-radius:12px;color:#b44450;padding-left:18px;box-shadow:0 3px 0 #f6e8e8}
.router-module>span{font-size:clamp(10px,1.02vw,14px);white-space:nowrap}.router-module strong{font-size:20px;font-weight:650}
.output-stage video{width:100%;aspect-ratio:26/15;display:block;object-fit:cover;border-radius:10px;border:1px solid #dae3dd;background:#e8ece9}
.flow-arrow{width:100%;height:30px;overflow:hidden;clip-path:polygon(0 25%,70% 25%,70% 0,100% 50%,70% 100%,70% 75%,0 75%)}
.flow-stripes{width:100%;height:100%;background:repeating-linear-gradient(-55deg,#87b9a8 0 8px,#acd0ed 8px 16px,#edce95 16px 24px,#e8a6aa 24px 32px);background-size:78px 100%;animation:flow-stream 1.3s linear infinite}
.method-play{position:absolute;bottom:12px;right:16px;display:grid;place-items:center;width:29px;height:29px;border:1px solid #d9e3dd;border-radius:50%;color:#567267;background:#fff;font-size:11px}.method-play:hover{border-color:var(--accent);color:var(--accent)}
.method-card.is-paused .flow-stripes,.method-card.is-paused .typing-cursor{animation-play-state:paused}.method-card[data-phase="routing"] .router-module{box-shadow:0 0 0 5px #d568700d,0 3px 0 #f6e8e8}
@keyframes flow-stream{to{background-position:78px 0}}@keyframes cursor-blink{50%{opacity:0}}
@media(max-width:1100px){.method-card{padding:42px 20px 48px}.method-flow{grid-template-columns:minmax(150px,1fr) 35px minmax(200px,1.15fr) 35px minmax(220px,1.4fr);gap:10px}.prompt-box{padding:16px;min-height:148px}.prompt-box p{font-size:13px}.existing-module,.router-module{height:132px;padding:9px;font-size:12px}.router-module>span{font-size:10px}.router-module strong{font-size:17px}}
@media(max-width:900px){.method-card{max-width:580px;padding:45px 24px}.method-flow{display:flex;flex-direction:column;gap:18px}.prompt-stage,.output-stage{width:100%}.prompt-box{min-height:110px}.prompt-box p{font-size:14px}.flow-arrow{width:58px;height:28px;transform:rotate(90deg);margin:10px 0}.model-stage{width:300px;max-width:100%;min-height:132px}.existing-module,.router-module{height:132px;font-size:15px}.router-module>span{font-size:13px}.router-module strong{font-size:21px}.output-stage{margin-top:26px}.stage-label{font-size:12px}.method-play{bottom:10px}}
@media(prefers-reduced-motion:reduce){.flow-stripes,.typing-cursor{animation:none}}

/* A single striped connection runs directly from prompt to output. */
.method-flow{position:relative;grid-template-columns:minmax(180px,1fr) minmax(230px,1.12fr) minmax(280px,1.45fr);gap:88px}
.flow-line{position:absolute;inset:0;width:100%;height:100%;overflow:visible;pointer-events:none;z-index:3}
.existing-module,.router-module{height:120px}
@media(max-width:1100px){.method-flow{grid-template-columns:minmax(150px,1fr) minmax(200px,1.15fr) minmax(220px,1.4fr);gap:50px}.existing-module,.router-module{height:112px}}
@media(max-width:900px){.method-flow{gap:44px}.model-stage{max-width:calc(100% - 40px)}.existing-module,.router-module{height:132px}.output-stage{margin-top:18px}}
@media(max-width:900px){.output-stage .stage-label{left:22px}}

/* Keep module labels clear of the center connection. */
@media(min-width:901px){.existing-module>span:first-child,.router-module>span{transform:translateY(-5px)}.existing-module>span:last-child,.router-module>strong{transform:translateY(5px)}}

/* The method modules sit in front of the continuous center connection. */
.model-stage{position:relative;z-index:4}

/* Alternate text and camera conditioning without shifting the diagram. */
.input-window{height:190px}.hero-input-panel{position:absolute;inset:0;will-change:transform,opacity}
.hero-input-panel .prompt-box,.hero-camera-box{height:100%;min-height:0;width:100%}
.hero-camera-panel{opacity:0;transform:translateY(28px);visibility:hidden}
.hero-camera-box{display:flex;align-items:center;justify-content:center;background:#fff;border:1px dashed #a6b8ae;border-radius:12px;box-shadow:0 3px 0 #e9efea}
.hero-camera-box .camera-controller{width:100%;max-width:280px;margin:0}
.model-stage{gap:12px;grid-template-columns:1fr 1.08fr}.existing-module{border-radius:12px}.existing-module:after{content:none;display:none}.router-module{padding-left:12px}
.existing-module>span:first-child,.router-module>span,.existing-module>span:last-child,.router-module>strong{transform:none}
@media(max-width:900px){.input-window{height:165px}.model-stage{max-width:100%;width:300px}.hero-camera-box .camera-controller{max-width:270px}}

/* Paper abstract and the two distinct efficiency gains. */
.abstract-section{padding:66px 0 64px;background:var(--soft);border-block:1px solid #e4ece6}
.abstract-content{max-width:1000px}.abstract-content h2{text-align:center;margin-bottom:26px}
.abstract-text{margin:0;color:#435c51;font-size:16px;line-height:1.85;text-align:left}
.speedup-highlights{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));margin-top:42px;padding-top:36px;border-top:1px solid #d6e3db}
.efficiency-stat{text-align:center;padding:0 30px}.efficiency-stat+.efficiency-stat{border-left:1px solid #d6e3db}
.stat-value{display:block;color:var(--accent);font-size:clamp(64px,6.5vw,88px);font-weight:750;line-height:1.05;letter-spacing:-4px;font-variant-numeric:lining-nums}
.efficiency-stat h3{font-size:18px;line-height:1.4;font-weight:650;margin:14px 0 10px;letter-spacing:-.2px}
.efficiency-stat p{max-width:350px;margin:0 auto;color:var(--text);font-size:14px;line-height:1.7}
@media(max-width:800px){.abstract-section{padding:46px 0}.abstract-text{font-size:15px;line-height:1.8}.efficiency-stat{padding:0 18px}.stat-value{font-size:68px}}
@media(max-width:500px){.abstract-content h2{margin-bottom:22px}.abstract-text{font-size:14px}.speedup-highlights{grid-template-columns:1fr;margin-top:30px;padding-top:30px;gap:28px}.efficiency-stat{padding:0 8px}.efficiency-stat+.efficiency-stat{border-left:0;border-top:1px solid #d6e3db;padding-top:28px}.stat-value{font-size:68px;letter-spacing:-3px}.efficiency-stat h3{font-size:17px;margin-top:12px}}

/* Keep the unavailable code action visible without offering navigation. */
.hero-actions{flex-wrap:wrap}.hero-actions .button{white-space:nowrap}
.code-placeholder,.code-placeholder:hover{color:#6a7a72;background:#f5f8f6;border-color:var(--line);cursor:default;opacity:1}
.back-to-top{text-align:center;padding-block:24px}

.overview-caption{max-width:1120px;margin:22px auto 0;color:var(--text);font-size:15px;line-height:1.8;text-align:center}
.overview-caption strong{display:block;color:var(--ink);font-weight:700;margin-top:4px}
@media(max-width:500px){.overview-caption{font-size:13px;margin-top:18px}}

.how-it-works-section{padding-top:64px}.how-it-works-section h2{text-align:center;margin-bottom:28px}
.how-it-works-section video{display:block;width:100%;height:auto;aspect-ratio:16/9;border:1px solid var(--line);border-radius:12px;background:#111}
@media(max-width:800px){.how-it-works-section{padding-top:46px}.how-it-works-section h2{margin-bottom:22px}}

/* Brief region explanations below the frozen denoising frame. */
.method-card{padding-bottom:136px}
.hero-region-captions{position:absolute;top:calc(100% + 12px);left:0;width:100%;opacity:0;visibility:hidden;text-align:left;font-size:11.5px;line-height:1.5}
.hero-region-captions p{margin:0;font-weight:550}.hero-region-captions p+p{margin-top:5px}
.region-one{color:#18723b}.region-many{color:#b7353e}
@media(max-width:900px){.method-card{padding-bottom:126px}}
@media(max-width:500px){.hero-region-captions{font-size:11px}}