:root {
  --ink:#07090a; --panel:#111518; --paper:#ecece7; --white:#f4f5f1;
  --muted:#7d858a; --line:rgba(255,255,255,.14); --darkline:rgba(7,9,10,.15);
  --hot:#ff5c19; --green:#69dc95; --mono:"SFMono-Regular","Cascadia Code",Consolas,monospace;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
  --shell:min(1180px,calc(100vw - 48px));
}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit}.shell{width:var(--shell);margin:auto}
.topbar{height:74px;padding:0 max(24px,calc((100vw - 1180px)/2));display:flex;align-items:center;justify-content:space-between;position:fixed;z-index:20;inset:0 0 auto;background:rgba(7,9,10,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);color:#fff}.brand{font:800 15px var(--mono);letter-spacing:.14em;text-decoration:none}.brand span{display:block;color:var(--hot);font-size:6px;letter-spacing:.28em;margin-top:3px}.topbar nav{display:flex;gap:27px}.topbar nav a{font:700 9px var(--mono);letter-spacing:.09em;text-decoration:none;color:#9da4a8}.topbar nav a:hover{color:#fff}.back{font:700 9px var(--mono);text-decoration:none;border:1px solid var(--line);padding:10px 13px}.back b{color:var(--hot);margin-left:10px}
.project-hero{min-height:760px;padding:150px 0 85px;background:var(--ink);color:#fff;position:relative;overflow:hidden}.project-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 78% 38%,var(--glow,rgba(255,92,25,.17)),transparent 30%),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:auto,72px 72px,72px 72px;mask-image:linear-gradient(90deg,black,transparent)}.project-hero.guardian{background:linear-gradient(90deg,rgba(7,9,10,.98),rgba(7,9,10,.72)),url("assets/biaa-hero-2026.jpg") center/cover}.hero-inner{position:relative;z-index:1}.crumbs{font:700 8px var(--mono);letter-spacing:.12em;color:#778086}.crumbs a{color:var(--hot);text-decoration:none}.status{display:inline-flex;align-items:center;gap:9px;margin-top:50px;padding:7px 9px;border:1px solid rgba(105,220,149,.35);font:700 8px var(--mono);color:var(--green)}.status.soon{color:#ffc184;border-color:rgba(255,193,132,.35)}.status i{width:5px;height:5px;border-radius:50%;background:currentColor;box-shadow:0 0 10px currentColor}.project-hero h1{font-size:clamp(58px,8vw,112px);line-height:.93;letter-spacing:-.072em;margin:30px 0 15px;max-width:1000px}.project-hero h1 em{font-style:normal;color:var(--hot)}.project-hero h2{font-size:clamp(23px,3vw,39px);letter-spacing:-.04em;margin:0 0 25px}.lead{max-width:720px;color:#a4abb0;font-size:16px;line-height:1.9}.hero-meta{display:flex;gap:7px;flex-wrap:wrap;margin-top:36px}.hero-meta span{padding:8px 10px;border:1px solid var(--line);font:700 8px var(--mono);letter-spacing:.07em;color:#a9afb3}
.section{padding:105px 0}.label{font:700 8px var(--mono);letter-spacing:.16em;color:var(--hot);padding-bottom:21px;border-bottom:1px solid var(--darkline)}.split{display:grid;grid-template-columns:1fr 1fr;gap:90px;margin-top:55px}.split h2{font-size:clamp(37px,4.5vw,61px);line-height:1.1;letter-spacing:-.055em;margin:0}.split p{font-size:15px;line-height:1.9;color:#555d61;margin:0}.notice{margin-top:25px;padding-left:15px;border-left:2px solid var(--hot);font-size:11px!important;color:#7c8285!important}.focus{display:grid;grid-template-columns:repeat(3,1fr);margin-top:70px;border-top:1px solid var(--darkline);border-left:1px solid var(--darkline)}.focus article{min-height:275px;padding:25px;border-right:1px solid var(--darkline);border-bottom:1px solid var(--darkline)}.focus span{font:700 8px var(--mono);color:var(--hot)}.focus h3{font-size:21px;margin:78px 0 12px}.focus p{font-size:12px;line-height:1.75;color:#71787c;margin:0}
.dark{background:var(--ink);color:#fff}.dark .label{border-color:var(--line)}.dark .split p{color:#8c9499}.stage-grid{display:grid;grid-template-columns:.7fr 1fr;margin-top:65px;border:1px solid var(--line)}.stage-card{padding:35px;background:var(--hot);color:#160b06}.stage-card small{font:700 8px var(--mono);letter-spacing:.12em}.stage-card strong{display:block;font:800 52px/1 var(--mono);margin:80px 0 18px}.stage-card p{font-size:12px;line-height:1.8;color:rgba(22,11,6,.68)}.questions{padding:35px}.questions h3{font-size:27px;margin:0 0 28px}.questions ol{list-style:none;padding:0;margin:0}.questions li{padding:18px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:38px 1fr;gap:12px;color:#a0a7ab;font-size:12px;line-height:1.7}.questions li b{color:var(--hot);font:700 9px var(--mono)}
.related{padding:90px 0}.related h2{font-size:36px;letter-spacing:-.04em;margin:0 0 38px}.related-grid{display:grid;grid-template-columns:repeat(3,1fr);border-left:1px solid var(--darkline);border-top:1px solid var(--darkline)}.related-grid a{min-height:180px;padding:23px;border-right:1px solid var(--darkline);border-bottom:1px solid var(--darkline);text-decoration:none;display:flex;flex-direction:column}.related-grid a:hover{background:#fff}.related-grid span{font:700 8px var(--mono);color:var(--hot)}.related-grid strong{font-size:18px;margin:auto 0 8px}.related-grid small{color:#747b7f}.cta{padding:85px 0;background:#101416;color:#fff}.cta h2{font-size:clamp(42px,6vw,75px);line-height:1;letter-spacing:-.06em;margin:0 0 35px}.cta h2 em{font-style:normal;color:var(--hot)}.cta a{display:inline-block;background:var(--hot);color:#160b06;text-decoration:none;padding:15px 18px;font:700 9px var(--mono)}footer{padding:30px 0;background:#07090a;color:#6d757a;font:700 7px var(--mono);letter-spacing:.1em}footer .shell{display:flex;justify-content:space-between;gap:20px}
.mobile-menu{display:none;position:relative}.mobile-menu summary{list-style:none;cursor:pointer;border:1px solid var(--line);padding:9px 11px;font:700 8px var(--mono);letter-spacing:.08em}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu div{position:absolute;right:0;top:40px;width:190px;background:#101416;border:1px solid var(--line);padding:8px}.mobile-menu div a{display:block;padding:12px;color:#c0c5c8;text-decoration:none;font:700 9px var(--mono);border-bottom:1px solid var(--line)}
.quick-nav{position:sticky;top:74px;z-index:10;background:rgba(236,236,231,.95);backdrop-filter:blur(14px);border-bottom:1px solid var(--darkline)}.quick-nav .shell{display:flex;gap:28px;overflow:auto;scrollbar-width:none}.quick-nav a{white-space:nowrap;padding:17px 0;text-decoration:none;font:700 8px var(--mono);letter-spacing:.08em;color:#687075}.quick-nav a:hover{color:var(--hot)}
.facts{display:grid;grid-template-columns:repeat(4,1fr);margin-top:60px;border-top:1px solid var(--darkline);border-left:1px solid var(--darkline)}.fact{min-height:150px;padding:22px;border-right:1px solid var(--darkline);border-bottom:1px solid var(--darkline)}.fact small,.architecture small,.metric-card small,.roadmap-card small,.risk-card small{font:700 8px var(--mono);letter-spacing:.1em;color:var(--hot)}.fact strong{display:block;font-size:17px;line-height:1.35;margin-top:45px}.fact p{font-size:11px;line-height:1.7;color:#777f83}
.section-title{display:grid;grid-template-columns:.7fr 1.3fr;gap:90px;margin-top:52px}.section-title h2{font-size:clamp(36px,4.5vw,60px);line-height:1.08;letter-spacing:-.055em;margin:0}.section-title>div>p{font-size:14px;line-height:1.9;color:#61696d;margin:0 0 18px}.dark .section-title>div>p{color:#98a0a5}
.architecture{display:grid;grid-template-columns:repeat(4,1fr);margin-top:65px;border:1px solid var(--darkline)}.architecture article{min-height:255px;padding:24px;border-right:1px solid var(--darkline)}.architecture article:last-child{border-right:0}.architecture b{display:block;font:800 38px var(--mono);color:rgba(7,9,10,.16);margin:35px 0}.architecture h3{font-size:18px;margin:0 0 12px}.architecture p{font-size:11px;line-height:1.75;color:#737b7f}.dark .architecture{border-color:var(--line)}.dark .architecture article{border-color:var(--line)}.dark .architecture b{color:rgba(255,255,255,.13)}.dark .architecture p{color:#8a9297}
.workflow{counter-reset:flow;display:grid;grid-template-columns:repeat(5,1fr);margin-top:65px;border-top:1px solid var(--line);border-left:1px solid var(--line)}.workflow article{counter-increment:flow;min-height:220px;padding:22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.workflow article:before{content:"0" counter(flow);font:700 9px var(--mono);color:var(--hot)}.workflow h3{font-size:16px;margin:70px 0 10px}.workflow p{font-size:10px;line-height:1.7;color:#929a9f}
.roadmap{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:65px}.roadmap-card{min-height:245px;background:#fff;padding:24px;border-top:3px solid #b7bdc0}.roadmap-card.active{border-color:var(--hot)}.roadmap-card.next{border-color:#d49a60}.roadmap-card span{display:inline-block;margin-top:20px;padding:6px 8px;background:#e8e9e5;font:700 8px var(--mono)}.roadmap-card h3{margin:38px 0 10px;font-size:18px}.roadmap-card p{font-size:11px;line-height:1.75;color:#737b7f}
.metrics{display:grid;grid-template-columns:repeat(3,1fr);margin-top:60px;border-left:1px solid var(--darkline);border-top:1px solid var(--darkline)}.metric-card{min-height:185px;padding:22px;border-right:1px solid var(--darkline);border-bottom:1px solid var(--darkline)}.metric-card h3{font-size:18px;margin:50px 0 8px}.metric-card p{font-size:11px;line-height:1.75;color:#747c80;margin:0}.metric-card em{font-style:normal;color:#a0a6aa;font:700 8px var(--mono)}
.risk-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:60px}.risk-card{padding:25px;border:1px solid var(--line);min-height:185px}.risk-card h3{font-size:19px;margin:42px 0 10px}.risk-card p{font-size:11px;line-height:1.8;color:#90989d}.risk-card b{color:var(--hot)}
.faq{margin-top:55px;border-top:1px solid var(--darkline)}.faq details{border-bottom:1px solid var(--darkline);padding:22px 0}.faq summary{cursor:pointer;font-weight:700;font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:30px}.faq summary:after{content:"+";color:var(--hot);font:700 16px var(--mono)}.faq details[open] summary:after{content:"−"}.faq p{max-width:820px;color:#697175;font-size:12px;line-height:1.85}.resource-list{margin-top:55px;border-top:1px solid var(--darkline)}.resource-list a,.resource-list>div{display:grid;grid-template-columns:120px 1fr auto;gap:20px;align-items:center;padding:20px 0;border-bottom:1px solid var(--darkline);text-decoration:none}.resource-list small{font:700 8px var(--mono);color:var(--hot)}.resource-list strong{font-size:15px}.resource-list span{font:700 8px var(--mono);color:#798084}.resource-list a:hover strong{color:var(--hot)}
.page-hero{padding:155px 0 90px;background:var(--ink);color:#fff;min-height:600px;position:relative;overflow:hidden}.page-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 30%,rgba(255,92,25,.17),transparent 28%),linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:auto,72px 72px,72px 72px;mask-image:linear-gradient(90deg,black,transparent)}.page-hero .shell{position:relative}.page-hero h1{font-size:clamp(58px,8vw,108px);line-height:.92;letter-spacing:-.07em;margin:55px 0 25px;max-width:1000px}.page-hero h1 em{font-style:normal;color:var(--hot)}.page-hero p{max-width:720px;color:#9aa2a7;font-size:16px;line-height:1.85}.page-count{display:flex;gap:35px;margin-top:55px}.page-count div{border-left:1px solid var(--line);padding-left:14px}.page-count strong{display:block;font:800 24px var(--mono)}.page-count small{font:700 7px var(--mono);color:#7d858a;letter-spacing:.08em}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);margin-top:55px;border-top:1px solid var(--darkline);border-left:1px solid var(--darkline)}.content-card{min-height:310px;padding:24px;border-right:1px solid var(--darkline);border-bottom:1px solid var(--darkline);text-decoration:none;display:flex;flex-direction:column}.content-card:hover{background:#fff}.content-card small{font:700 8px var(--mono);color:var(--hot)}.content-card h3{font-size:24px;letter-spacing:-.035em;margin:70px 0 8px}.content-card h4{font-size:14px;margin:0 0 14px}.content-card p{font-size:11px;line-height:1.75;color:#747c80}.content-card span{margin-top:auto;font:700 8px var(--mono);color:#6f777b}.content-card.active{box-shadow:inset 0 3px var(--hot)}
.table-list{margin-top:55px;border-top:1px solid var(--darkline)}.table-row{display:grid;grid-template-columns:70px 1.4fr 1fr 100px;gap:20px;padding:22px 0;border-bottom:1px solid var(--darkline);align-items:center}.table-row small{font:700 8px var(--mono);color:var(--hot)}.table-row strong{font-size:15px}.table-row p{font-size:11px;line-height:1.6;color:#737b7f;margin:0}.table-row a{font:700 8px var(--mono);text-decoration:none;text-align:right}.table-row a:hover{color:var(--hot)}
@media(max-width:900px){.architecture{grid-template-columns:repeat(2,1fr)}.architecture article:nth-child(2){border-right:0}.architecture article{border-bottom:1px solid var(--darkline)}.workflow{grid-template-columns:repeat(3,1fr)}.facts,.roadmap{grid-template-columns:repeat(2,1fr)}.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){:root{--shell:calc(100vw - 32px)}.topbar{padding:0 16px}.topbar nav,.topbar>.back{display:none}.mobile-menu{display:block}.project-hero{min-height:680px;padding-top:125px}.split,.stage-grid,.section-title{grid-template-columns:1fr;gap:35px}.focus,.related-grid,.metrics{grid-template-columns:1fr 1fr}.stage-card strong{margin-top:50px}.section{padding:80px 0}.workflow{grid-template-columns:repeat(2,1fr)}.table-row{grid-template-columns:45px 1fr}.table-row p{grid-column:2}.table-row a{text-align:left;grid-column:2}}
@media(max-width:520px){.project-hero h1{font-size:52px}.lead{font-size:14px}.focus,.related-grid,.facts,.architecture,.roadmap,.metrics,.risk-grid,.card-grid{grid-template-columns:1fr}.architecture article{border-right:0}.workflow{grid-template-columns:1fr 1fr}.focus article{min-height:220px}.focus h3{margin-top:48px}.back{font-size:0}.back b{font-size:12px;margin:0}.page-count{gap:15px}.page-count strong{font-size:18px}.page-hero{min-height:560px}footer .shell{flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}