:root{
  --ink:#102d4d;--ink-soft:#173e63;--muted:#173e63;
  --paper:#fff;--white:#fff;--line:#6f8b83;--border-strong:#426b5e;
  --mint:#e5f3ec;--mint-dark:#006653;--coral:#9c351f;
  --navy:#0b263b;--on-dark:#fff;--on-dark-accent:#9c351f;
  --shadow:0 12px 36px rgba(16,45,77,.07);
  scroll-behavior:smooth;
}
*{box-sizing:border-box}
[hidden]{display:none!important}
html{scroll-padding-top:96px}
body{margin:0;background:var(--paper);color:var(--ink);font:18px/1.7 Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-font-smoothing:antialiased}
h1,h2,h3,h4,h5,p{margin-top:0}
img{display:block;max-width:100%;height:auto}
a{color:var(--mint-dark);text-underline-offset:3px}
button{font:inherit;cursor:pointer}
.shell{width:min(1160px,calc(100% - 64px));margin-inline:auto}
.skip-link{position:fixed;z-index:100;top:-80px;left:16px;padding:12px 16px;background:var(--navy);color:#fff;border-radius:6px}
.skip-link:focus{top:12px}
:focus-visible{outline:3px solid var(--mint-dark);outline-offset:4px}
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line)}
.nav-inner{height:76px;display:flex;align-items:center;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);font-size:24px;font-weight:750;letter-spacing:-.025em;white-space:nowrap}
.brand-dot{color:var(--coral)}
.brand-mark{display:grid;grid-template-columns:repeat(2,7px);grid-template-rows:repeat(2,7px);gap:4px}
.brand-mark i{display:block;border-radius:50%;background:var(--mint-dark)}
.brand-mark i:nth-child(2){background:#4bad8b}.brand-mark i:nth-child(3){background:#8cd4b9}.brand-mark i:nth-child(4){background:var(--coral)}
.desktop-nav{display:flex;align-items:center;gap:25px;margin-left:auto}
.desktop-nav a{font-size:16px;font-weight:650;text-decoration:none;color:var(--ink)}
.desktop-nav a:hover{text-decoration:underline;color:var(--mint-dark)}
.mobile-menu{display:none}
.hero{padding-top:64px;padding-bottom:64px;text-align:center}
.section-kicker,.step-index,.note-label,.formula-label{color:var(--mint-dark);font-size:15px;font-weight:700;letter-spacing:.04em;text-transform:none}
.project-name{margin:0 auto 16px;color:var(--mint-dark);font-size:clamp(48px,5.6vw,70px);font-weight:800;line-height:1.05;letter-spacing:-.04em}
h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:700;letter-spacing:-.025em}
h1{max-width:1160px;margin:20px auto 24px;font-size:clamp(36px,4.4vw,56px);line-height:1.2}
h1 em{font-style:normal;color:var(--mint-dark)}
.hero-title-line{display:block;white-space:nowrap}
.hero-tldr{max-width:1040px;margin:28px auto 0;padding:22px 26px;border:2px solid #6c8fca;border-left:5px solid #1e54cc;border-radius:8px;background:#fff;text-align:left}
.hero-tldr p{margin:0;color:var(--ink);font-size:20px;line-height:1.7}
.hero-tldr-label{display:inline-block;margin-right:12px;color:#1e54cc;font-size:22px;font-weight:800;letter-spacing:.015em}
.hero-tldr p>strong:not(.hero-tldr-label){font-weight:700}
.authors{margin-top:26px;font-size:19px;font-weight:650;line-height:1.7}
.authors span{color:var(--mint-dark);padding:0 8px}
.authors .author-name{display:inline-block;padding:0;color:inherit;white-space:nowrap}
.affiliations{display:flex;justify-content:center;flex-wrap:wrap;gap:4px 20px;margin:8px 0 0;color:var(--ink);font-size:16px;line-height:1.7}
.authors sup,.affiliations sup{color:var(--mint-dark);font-size:14px;line-height:0;vertical-align:super;font-weight:700}
.affiliations>span{display:inline-block}
.hero-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-top:26px}
.hero-actions .button{gap:10px}
.button-icon{display:block;width:20px;height:20px;fill:currentColor;flex:none}
.button{display:inline-flex;align-items:center;justify-content:center;gap:16px;min-height:48px;padding:11px 18px;border-radius:6px;text-decoration:none;font-size:16px;font-weight:650;line-height:1.5}
.button-primary{background:var(--navy);color:#fff}.button-primary:hover{background:#174d69}
.button-secondary{background:#fff;color:var(--ink);border:2px solid var(--border-strong)}.button-secondary:hover{background:var(--mint)}
.availability{margin:18px auto 0;display:flex;align-items:center;justify-content:center;gap:8px;font-size:15px;color:var(--ink)}
.status-dot{width:7px;height:7px;border-radius:50%;background:var(--mint-dark)}
.image-frame{margin:42px auto 0;padding:16px;background:#fff;border:2px solid var(--line);border-radius:10px;text-align:left}
.figure-topline{display:flex;justify-content:space-between;gap:16px;padding:0 2px 14px;color:var(--ink);font-size:15px;font-weight:650;line-height:1.5}
.image-frame img{width:100%;border-radius:4px}
.image-frame figcaption{padding:16px 2px 0;color:var(--ink);font-size:16px;line-height:1.65}

.section{padding-block:82px;scroll-margin-top:76px}
.section-heading{max-width:850px;margin-bottom:34px}
.section-heading h2,.closing-grid h2,.citation-inner h2{font-size:clamp(32px,3.8vw,46px);line-height:1.2;margin:10px 0 18px}
.section-heading p{font-size:18px;line-height:1.75;color:var(--ink);margin-bottom:0}
.method-section{background:#fff;border-block:1px solid var(--line)}
.method-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:30px}
.method-steps article{background:#fff;border:2px solid var(--line);border-radius:8px;padding:25px 23px}
.method-steps h3{font-size:22px;line-height:1.35;margin:13px 0 12px;letter-spacing:-.015em}
.method-steps p{font-size:17px;line-height:1.7;color:var(--ink);margin:0}
.formula-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:center;margin-top:28px;padding:30px;background:var(--navy);color:#fff;border-radius:8px}
.formula-label{color:#b5f4df}
.formula{font-family:Georgia,serif;font-size:clamp(20px,2.3vw,28px);margin:16px 0 0;white-space:nowrap;overflow-x:auto}
.fraction{display:inline-flex;vertical-align:middle;flex-direction:column;text-align:center;line-height:1.2;font-size:.9em}
.fraction>span:first-child{border-bottom:1px solid #b5f4df;padding:0 4px 5px}.fraction>span:last-child{padding-top:5px}
.formula-panel>p{font-size:17px;color:#fff;margin:0;line-height:1.7}
.results-intro{display:grid;grid-template-columns:.8fr 1.2fr;gap:20px;margin-bottom:28px}
.result-feature,.result-note{padding:28px;border:2px solid var(--line);border-radius:8px;background:#fff}
.result-feature{background:#fff;border-color:var(--border-strong)}
.result-feature span{font-size:16px;color:var(--mint-dark);font-weight:700}
.result-feature strong{display:block;margin:12px 0;color:var(--mint-dark);font:700 clamp(44px,5vw,64px)/1.15 Georgia,serif}
.result-feature p,.result-note p{margin:12px 0 0;color:var(--ink);font-size:18px;line-height:1.7}
.result-note .note-label{color:var(--coral);font-size:18px}
.table-scroll{overflow:auto;border:2px solid var(--line);border-radius:8px;background:#fff}
table{width:100%;min-width:850px;border-collapse:collapse;font-size:17px;font-variant-numeric:tabular-nums}
caption{text-align:left;padding:20px 24px;font-size:16px;color:var(--ink);border-bottom:1px solid var(--line);line-height:1.65}
th,td{padding:18px 20px;text-align:left;white-space:nowrap;border-bottom:1px solid var(--line)}
thead th{font-size:15px;font-weight:700;color:var(--ink);background:#fff;line-height:1.5}
tbody th{font-weight:650}tbody tr:last-child th,tbody tr:last-child td{border-bottom:0}
tbody tr:hover{background:#f0f8f2}.arrow{color:var(--mint-dark);padding:0 5px}.gain{font-weight:750;color:var(--mint-dark)}
.table-footnote{margin:18px 0 0;max-width:1000px;color:var(--ink);font-size:16px;line-height:1.7}
.examples-section{background:#fff;border-block:1px solid var(--line)}
.gallery-display,.video-results{width:min(1860px,calc(100vw - 48px));margin-left:50%;transform:translateX(-50%);background:#fff;color:var(--ink);border:2px solid var(--line);border-radius:10px;padding:28px}
.gallery-display{display:grid;grid-template-columns:210px minmax(0,1fr);gap:0 24px;align-items:start}
#gallery-results .gallery-display + .gallery-display{margin-top:32px}
.gallery-meta{padding:8px 0 18px;align-self:start}
.gallery-model{font-size:15px;font-weight:700;color:var(--mint-dark);letter-spacing:.025em}
.gallery-meta h3{font-size:27px;line-height:1.35;letter-spacing:-.015em;margin:10px 0 0;font-weight:650;overflow-wrap:break-word}
.gallery-meta p{margin:16px 0 0;color:var(--ink);font-size:16px;line-height:1.65}
.image-matrix-scroll,.video-matrix-scroll{overflow-x:auto;min-width:0;scrollbar-color:var(--mint-dark) #fff;scrollbar-width:auto}
.image-matrix-scroll:focus-visible,.video-matrix-scroll:focus-visible{outline-color:var(--mint-dark)}
.image-matrix{min-width:1080px}.gallery-nine .image-matrix{min-width:1480px}.gallery-six .image-matrix{min-width:1080px}
.image-strip{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:10px}
.gallery-nine .image-strip{grid-template-columns:repeat(9,minmax(0,1fr))}
.image-method-row{display:grid;grid-template-columns:150px minmax(0,1fr);gap:12px;align-items:center;padding:15px 0;border-top:1px solid var(--line)}
.image-method-row h4{margin:0;font-size:20px;font-weight:650;line-height:1.35;color:var(--ink)}
.image-tile{aspect-ratio:1;min-width:0;overflow:hidden;background:#fff;border:2px solid var(--line)}
.gallery-display .image-tile img{display:block;position:static;width:100%;height:auto;object-fit:contain;border-radius:0}
.image-method-row-ours{box-shadow:inset 0 0 0 3px var(--on-dark-accent);margin-top:4px}
.image-method-row-ours h4{color:var(--on-dark-accent);padding-left:12px}
.gallery-footer{grid-column:2;margin-top:15px;font-size:16px;line-height:1.65;color:var(--ink)}
.gallery-footer a{color:var(--mint-dark)}
.video-results{margin-top:48px}
.video-intro{margin-bottom:24px}
.video-intro h3{font-size:34px;line-height:1.3;margin:10px 0 14px;font-weight:650;letter-spacing:-.015em}
.video-intro p{font-size:18px;line-height:1.75;color:var(--ink);margin:0}
.video-scroll-hint{display:block;color:var(--mint-dark);font-size:16px;margin-top:12px}
.video-prompt-group + .video-prompt-group{margin-top:36px}
.video-selection{display:flex;align-items:center;justify-content:space-between;gap:24px;border-top:1px solid var(--line);padding:24px 0 18px}
.video-selection h4{font-size:clamp(24px,2.5vw,32px);line-height:1.35;margin:0;letter-spacing:-.015em;font-weight:650;color:var(--ink)}
.video-play-group{border:2px solid var(--border-strong);background:#115948;color:#fff;flex-shrink:0}
.video-play-group:hover{background:#187059}
.video-matrix{min-width:0;width:calc(var(--video-matrix-width,160%) + var(--video-extra-gap,6px))}
.video-strip{display:grid;grid-template-columns:repeat(var(--video-columns,8),minmax(0,1fr));gap:10px}
.video-method-row{padding:16px 0 20px;border-top:1px solid var(--line)}
.video-method-row h5{margin:0 0 14px;font-size:22px;font-weight:650;line-height:1.35;color:var(--ink)}
.video-strip video{display:block;width:100%;aspect-ratio:832/480;object-fit:contain;background:#fff;border:2px solid var(--line)}
.video-method-row-ours{margin-top:4px;box-shadow:inset 0 0 0 3px var(--on-dark-accent)}
.video-method-row-ours h5{padding-left:12px;color:var(--on-dark-accent)}
.video-note{margin:30px 0 0;padding-top:22px;border-top:1px solid var(--line);color:var(--ink);font-size:16px;line-height:1.75}
.video-note strong{color:var(--ink)}.video-note a{color:var(--mint-dark)}
.closing-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:60px}
.closing-grid p{color:var(--ink);font-size:18px;line-height:1.75}
.limitations{align-self:start;margin-top:22px;background:#fff;border:2px solid var(--line);border-top:3px solid var(--mint-dark);border-radius:8px;padding:26px}
.limitations .note-label{font-size:20px;color:var(--mint-dark)}
.limitations ul{padding-left:22px;margin:16px 0 0;color:var(--ink);font-size:17px;line-height:1.7}
.limitations li+li{margin-top:12px}
.citation-section{background:#fff;color:var(--ink)}
.citation-inner{display:grid;grid-template-columns:.6fr 1.4fr;gap:44px;align-items:start}
.citation-inner .section-kicker{color:var(--mint-dark)}.citation-inner p{color:var(--ink);font-size:17px}
.citation-code{position:relative;border:2px solid var(--line);border-radius:8px;background:#fff;overflow:hidden}
.citation-code pre{overflow:auto;margin:0;padding:68px 24px 24px;color:var(--ink);font-size:15px;line-height:1.75}
.copy-button{position:absolute;top:14px;right:14px;border:2px solid var(--border-strong);border-radius:5px;padding:7px 12px;background:#115948;color:#fff;font-size:15px;font-weight:650}
.copy-button:hover{background:#187059}
.site-footer{background:#fff;color:var(--ink);border-top:1px solid var(--line)}
.footer-inner{display:flex;align-items:center;gap:24px;padding-block:26px}
.site-footer .brand{color:var(--ink);font-size:22px}.site-footer .brand-dot{color:var(--on-dark-accent)}
.site-footer p{margin:0;color:var(--ink);font-size:15px}
.site-footer a:last-child{margin-left:auto;color:var(--mint-dark);font-size:15px;white-space:nowrap}
@media(max-width:1050px){
  .desktop-nav{gap:18px}
  .formula-panel{grid-template-columns:1fr;gap:24px}
  .closing-grid{gap:32px}
}
@media(max-width:900px){
  .gallery-display{grid-template-columns:1fr;gap:0}.gallery-footer{grid-column:1}
  .gallery-meta{padding-bottom:24px}.gallery-meta h3{font-size:28px}
  .method-steps{grid-template-columns:1fr}.method-steps article{padding:24px}
}
@media(max-width:740px){
  html{scroll-padding-top:80px}.shell{width:calc(100% - 32px)}
  .nav-inner{height:66px}.brand{font-size:23px}.desktop-nav{display:none}
  .mobile-menu{position:relative;display:block;margin-left:auto;font-size:16px;font-weight:650}
  .mobile-menu summary{cursor:pointer;list-style:none;border:2px solid var(--border-strong);border-radius:6px;padding:8px 12px}
  .mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu summary span{padding-left:8px}
  .mobile-menu nav{position:absolute;right:0;top:48px;z-index:5;min-width:185px;padding:8px;background:#fff;border:2px solid var(--line);border-radius:6px;box-shadow:var(--shadow)}
  .mobile-menu nav a{display:block;padding:10px 12px;text-decoration:none;color:var(--ink)}
  .hero{padding-top:42px;padding-bottom:44px}.authors{font-size:18px}.authors span{padding:0 4px}
  .affiliations{font-size:16px}.availability{font-size:15px}.image-frame{margin-top:32px;padding:10px}
  .figure-topline{flex-direction:column;gap:6px}.image-frame figcaption{font-size:15px}

  .section{padding-block:58px}.section-heading{margin-bottom:28px}
  .formula-panel{padding:23px}.formula{font-size:21px}
  .results-intro{grid-template-columns:1fr}.result-feature,.result-note{padding:24px}
  .gallery-display,.video-results{width:calc(100vw - 24px);padding:18px;border-radius:8px}
  .image-method-row h4{font-size:19px}.gallery-meta h3{font-size:26px}
  .video-intro h3{font-size:29px}.video-selection{display:block}.video-selection h4{font-size:25px}
  .video-play-group{margin-top:16px}.video-matrix{min-width:0}
  .video-method-row h5{font-size:21px}.video-note{font-size:16px}
  .closing-grid{grid-template-columns:1fr;gap:12px}.limitations{margin-top:0}
  .citation-inner{grid-template-columns:1fr;gap:20px}
  .footer-inner{flex-wrap:wrap;gap:12px 18px}.footer-inner p{width:100%;order:3}
}
@media(max-width:400px){h1{font-size:35px}.hero-actions{display:grid}.button{width:100%}.formula{font-size:19px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

@media(max-width:740px){
 .hero-title-line{white-space:normal}
 .hero-tldr{padding:18px;border-left-width:5px;margin-top:24px}
 .hero-tldr p{font-size:18px}.hero-tldr-label{font-size:20px;margin-right:9px}
}

/* Prompt thumbnails sit below the single expanded comparison. */
.video-picker{margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}
.video-picker-header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:12px;color:var(--ink);font-size:17px;font-weight:650}
.video-picker-actions{display:flex;gap:8px}
.video-picker-actions button{width:42px;height:38px;display:grid;place-items:center;border:2px solid var(--border-strong);border-radius:5px;background:#115948;color:#fff;font-size:22px;line-height:1}
.video-picker-actions button:hover{background:#187059}
.video-picker-actions button:disabled{background:#fff;border-style:dashed;color:var(--ink);cursor:default}
.video-thumbnail-list{position:relative;display:flex;align-items:stretch;gap:12px;overflow-x:auto;padding:6px 4px 14px;scrollbar-color:var(--mint-dark) #fff;scroll-snap-type:x proximity}
.video-thumbnail{flex:0 0 154px;min-width:0;padding:0;overflow:hidden;scroll-snap-align:center;border:3px solid var(--line);border-radius:7px;background:#fff;color:var(--ink);text-align:center;opacity:1}
.video-thumbnail img{display:block;width:100%;height:88px;object-fit:contain;background:#fff}
.video-thumbnail span{display:block;padding:7px 5px;font-size:15px;font-weight:650;line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.video-thumbnail:hover{border-color:#1e54cc}
.video-thumbnail[aria-selected="true"]{border-color:#1e54cc;box-shadow:0 0 0 2px #1e54cc}
.video-thumbnail[aria-selected="true"] span{color:#1e54cc}
.video-thumbnail:focus-visible{outline:3px solid var(--mint-dark);outline-offset:3px}
@media(max-width:740px){.video-thumbnail{flex-basis:140px}.video-thumbnail img{height:79px}.video-picker-header{font-size:16px}}

/* Five full-width columns; one horizontal control moves all methods together. */
.video-group-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;flex-shrink:0}
.video-seed-toggle{border:2px solid var(--border-strong);background:#115948;color:#fff;white-space:nowrap}
.video-seed-toggle:hover{background:#187059}
.video-method-row h5{position:sticky;left:0;width:max-content;max-width:100%;z-index:1;background:#fff;padding-right:12px}
@media(max-width:740px){.video-group-actions{margin-top:16px;gap:8px}.video-group-actions .button{margin-top:0;padding:9px 12px;min-height:44px;width:auto}}

/* Each image model has its own prompt selector. */
.image-model-display{width:min(1860px,calc(100vw - 48px));margin-left:50%;transform:translateX(-50%);padding:28px;background:#fff;color:var(--ink);border:2px solid var(--line);border-radius:10px}
.image-model-display + .image-model-display{margin-top:32px}
.image-model-heading{margin:0 0 20px;font-size:30px;line-height:1.3;color:var(--mint-dark)}
.image-model-display .gallery-display{display:block;width:100%;margin:0;transform:none;padding:0;border:0;border-radius:0}
.image-model-display .gallery-meta{padding:0 0 20px}
.image-model-display .gallery-meta h3{margin:0;font-size:27px}
.image-model-display .gallery-footer{margin-top:15px}
.image-thumbnail img{height:100px}
@media(max-width:740px){.image-model-display{width:calc(100vw - 24px);padding:18px;border-radius:8px}.image-model-heading{font-size:27px}.image-model-display .gallery-meta h3{font-size:24px}.image-thumbnail img{height:92px}}

.language-select{flex:none;max-width:112px;border:2px solid var(--border-strong);border-radius:6px;padding:9px 10px;background:#fff;color:var(--ink);font:650 16px/1.5 Inter,ui-sans-serif,system-ui,sans-serif;cursor:pointer}
html[lang="zh-CN"] body{font-family:Inter,"PingFang SC","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif}
html[lang="zh-CN"] h1,html[lang="zh-CN"] h2{font-family:"PingFang SC","Microsoft YaHei",ui-sans-serif,system-ui,sans-serif;letter-spacing:0}
@media(max-width:740px){.nav-inner{gap:10px}.language-select{margin-left:auto;max-width:96px;font-size:15px;padding:8px}.mobile-menu{margin-left:0}}
@media(max-width:380px){.nav-inner{gap:8px}.brand{font-size:20px;gap:6px}.language-select{max-width:78px;font-size:14px;padding:8px 4px}.mobile-menu{font-size:14px;flex:none}.mobile-menu summary{padding:7px 6px;white-space:nowrap}.mobile-menu summary span{padding-left:4px}}