/* W Studio Lab · B edition (light) — v2, 2026-09-26
   One accent only: Pratt yellow #FFCE2E (measured on pratt.edu). No maroon, no dark colour fields.
   Yellow as a field: the footer only. Everywhere else it is a highlighter mark. No external fonts or libraries. */
:root{
  --paper:#FAF8F3;--paper2:#F3EFE6;--card:#FFFFFF;
  --ink:#1C1A17;--ink2:#4A4540;--ink3:#8A837A;--rule:#E3DED4;
  --yellow:#FFCE2E;--yellow-tint:#FFF3C9;
  --sans:"Helvetica Neue",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --mark:linear-gradient(180deg,transparent 56%,var(--yellow) 56%,var(--yellow) 92%,transparent 92%);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
h1,h2,h3,p{margin:0}
.wrap{width:min(1240px,calc(100% - 72px));margin:0 auto}
.kick,.eyebrow{font:12px/1.7 var(--mono);letter-spacing:.14em;text-transform:uppercase;color:var(--ink3)}
.mk,.chip{background:var(--mark);-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:0 3px}
.chip{display:inline;font:13px/1.9 var(--mono);color:var(--ink)}
.more{display:inline-block;border-bottom:3px solid var(--yellow);padding-bottom:1px;font-weight:500;transition:background-color .25s}
.more:hover{background:var(--yellow)}
.js .reveal{opacity:0;transform:translateY(18px);transition:opacity .8s ease,transform .8s ease}
.js .reveal.in{opacity:1;transform:none}

/* ---------- pills ---------- */
.pills{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end;align-items:center}
.pill{border:1.5px solid currentColor;border-radius:999px;padding:6px 15px;font-size:15px;line-height:1.4;transition:background-color .25s,color .25s}
.pill.seg{padding:0;display:inline-flex;overflow:hidden}
.pill.seg>*{padding:6px 12px}
.onvideo .pill{background:#fff;border-color:#fff;color:var(--ink)}
.onvideo .pill:hover{background:var(--yellow);border-color:var(--yellow)}
.onvideo .pill.seg{background:transparent;color:#fff}
.onvideo .pill.seg .on{background:#fff;color:var(--ink)}
.onpaper .pill{color:var(--ink)}
.onpaper .pill:hover{background:var(--yellow)}
.onpaper .pill.seg:hover{background:transparent}
.onpaper .pill.seg .on{background:var(--yellow)}

/* ---------- home hero: full-bleed looping video ---------- */
.bhero{position:relative;height:100vh;min-height:600px;overflow:hidden;color:#fff;background:#8a857c url(media/b-poster.jpg?v=a6c6f1902e) center/cover}
.bhero video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.bhero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,16,12,.30) 0%,rgba(20,16,12,0) 20%,rgba(20,16,12,0) 60%,rgba(20,16,12,.52) 100%)}
.bhero .mark,.headline{text-shadow:0 2px 22px rgba(20,16,12,.35)}
.bhero .top{position:absolute;z-index:2;inset:0 0 auto 0;display:flex;justify-content:space-between;align-items:flex-start;gap:24px;padding:26px 36px}
.mark{font-weight:700;font-size:clamp(40px,5.4vw,84px);letter-spacing:-.05em;line-height:.9}
.bhero .pills{padding-top:8px}
.bhero .bottom{position:absolute;z-index:2;left:36px;right:36px;bottom:38px;display:flex;justify-content:space-between;align-items:flex-end;gap:30px}
.headline{font-weight:300;font-size:clamp(38px,5.4vw,84px);line-height:1.08;letter-spacing:-.045em;text-decoration:underline;text-decoration-color:var(--yellow);text-decoration-thickness:3px;text-underline-offset:.14em;max-width:14em}
.credits{font:12px/1.75 var(--mono);letter-spacing:.05em;text-align:right;opacity:.95;text-shadow:0 1px 8px rgba(0,0,0,.35)}
.credits b{color:var(--yellow);font-weight:500}
.credits .pc{display:block;margin-top:6px;font-size:10.5px;letter-spacing:.02em;opacity:.82}

/* ---------- marquee ---------- */
.marquee{overflow:hidden;border-bottom:1px solid var(--rule);background:var(--paper);white-space:nowrap}
.marquee .track{display:inline-flex;padding:15px 0;animation:mq 46s linear infinite}
.marquee span{font:13px var(--mono);letter-spacing:.12em;color:var(--ink2);padding:0 22px;position:relative}
.marquee span::after{content:"";position:absolute;right:-3px;top:50%;width:6px;height:6px;margin-top:-3px;border-radius:50%;background:var(--yellow)}
@keyframes mq{to{transform:translateX(-50%)}}

/* ---------- intro ---------- */
.intro{padding:92px 0 84px;display:grid;grid-template-columns:1.25fr 1fr;gap:64px;align-items:end}
.intro h2{font-weight:300;font-size:clamp(40px,4.9vw,76px);line-height:1.06;letter-spacing:-.045em;margin-top:18px}
.intro p{font-size:18px;color:var(--ink2)}
.tw{margin-top:22px;font:15px/1.9 var(--mono);color:var(--ink);min-height:3.8em}
.tw .tw-text{background:var(--mark);-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:0 2px}
.tw .caret{display:inline-block;width:2px;height:1.1em;background:var(--ink);vertical-align:-.2em;margin-left:3px;animation:blink 1s steps(1) infinite}
@keyframes blink{50%{opacity:0}}
.facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:26px;padding-top:18px;border-top:1px solid var(--rule);font-size:13px;color:var(--ink2)}

/* ---------- section heads ---------- */
.shead{display:flex;justify-content:space-between;align-items:flex-end;gap:30px;padding:0 0 30px}
.shead h2{font-weight:300;font-size:clamp(36px,4vw,60px);letter-spacing:-.04em;line-height:1.05}
.shead p{max-width:28em;color:var(--ink3);font-size:15px}

/* ---------- teases ---------- */
.tease{position:relative;overflow:hidden}
.tease .bg{position:absolute;inset:0;background-size:cover;background-position:center}
/* 01 · white card over a light wash of the product image (Pratt) */
.tease.card-over{min-height:86vh;display:flex;align-items:center;padding:60px 0}
.tease.card-over .card{position:relative;z-index:1;margin-left:6vw;width:min(1080px,88vw);background:var(--card);display:grid;grid-template-columns:1.12fr 1fr;gap:36px;padding:38px;box-shadow:0 30px 80px rgba(60,45,25,.14)}
.card h2{font-weight:400;font-size:clamp(26px,2.6vw,42px);line-height:1.14;letter-spacing:-.03em;margin:12px 0 16px}
.card p{color:var(--ink2);font-size:16px;margin-bottom:16px}
.card .more{margin-top:20px}
.card .shot{overflow:hidden;background:var(--paper2)}
.card .shot img{width:100%;height:100%;min-height:280px;object-fit:cover;transition:transform 1.1s ease}
.tease:hover .card .shot img{transform:scale(1.04)}
/* 02 · light band with a swaying product card (Suno) */
.tease.band{background:var(--paper2);padding:110px 0}
.tease.band .inner{display:grid;grid-template-columns:1fr 1.15fr;gap:60px;align-items:center}
.tease.band h2{font-weight:300;font-size:clamp(34px,3.8vw,58px);line-height:1.1;letter-spacing:-.04em;margin:14px 0 18px}
.tease.band p{color:var(--ink2);font-size:17px;margin-bottom:16px}
.tease.band .more{margin-top:22px}
.sway{transform-origin:60% 50%;animation:sway 9s ease-in-out infinite}
.sway img{border-radius:12px;box-shadow:0 40px 80px rgba(60,45,25,.22);transition:transform .6s ease}
.tease.band:hover .sway img{transform:scale(1.02)}
@keyframes sway{0%,100%{transform:rotate(-3.2deg) translateY(0)}50%{transform:rotate(-1.2deg) translateY(-10px)}}
/* 03 · figure: headline on paper, the FuXi wall as a printed plate below */
.tease.figure{padding:110px 0 100px}
.tease.figure .copy{max-width:980px}
.tease.figure h2{font-weight:300;font-size:clamp(36px,4.8vw,76px);line-height:1.08;letter-spacing:-.045em;margin:14px 0 18px}
.tease.figure p{color:var(--ink2);font-size:17px;max-width:40em}
.tease.figure .more{margin-top:22px}
.plate{margin-top:46px;background:var(--card);border:1px solid var(--rule);border-radius:18px;overflow:hidden;box-shadow:0 30px 70px rgba(60,45,25,.10)}
.plate img{width:100%;height:auto;transition:transform 1.2s ease}
.plate:hover img{transform:scale(1.015)}
/* 04 · method: paper, stage chain with yellow marks */
.tease.method{padding:100px 0;border-top:1px solid var(--rule)}
.tease.method h2{font-weight:300;font-size:clamp(36px,4.6vw,72px);line-height:1.06;letter-spacing:-.045em;margin:14px 0 26px;max-width:15em}
.seq{font:13px/2 var(--mono);letter-spacing:.06em;border-top:1.5px solid var(--ink);border-bottom:1px solid var(--rule);padding:12px 0;margin-bottom:34px}
.seq b{background:var(--yellow);color:var(--ink);padding:2px 7px;font-weight:600}
.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:34px}
.principles dt{font:12px var(--mono);letter-spacing:.16em;color:var(--ink3)}
.principles dd{margin:8px 0 0;font-size:19px;line-height:1.5}

/* ---------- bento (Suno) ---------- */
.bento-sec{padding:100px 0 90px}
.bento{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.bcard{background:var(--card);border:1px solid var(--rule);border-radius:18px;padding:28px 28px 30px;transition:transform .35s ease,border-color .35s ease,box-shadow .35s ease}
.bcard:hover{transform:translateY(-5px);border-color:var(--ink);box-shadow:0 22px 50px rgba(60,45,25,.10)}
.bcard svg{width:56px;height:56px;color:var(--ink);margin-bottom:22px;transition:transform .5s ease}
.bcard svg .acc{fill:var(--yellow);stroke:none}
.bcard:hover svg{transform:rotate(-8deg) scale(1.06)}
.bcard h3{font-weight:500;font-size:20px;letter-spacing:-.01em;margin-bottom:8px}
.bcard p{color:var(--ink2);font-size:15px;line-height:1.75}

/* ---------- through-line ---------- */
.line-sec{padding:40px 0 100px;border-top:1px solid var(--rule)}
.huge{font-weight:300;font-size:clamp(64px,10vw,150px);letter-spacing:-.06em;line-height:.95;text-align:right;margin:40px 0 10px}
.line-sub{text-align:right;color:var(--ink3);margin-bottom:46px}
.line{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px}
.line .row{display:grid;grid-template-columns:128px 1fr;gap:18px;padding:18px 0;border-top:1px solid var(--rule);transition:background-color .3s}
.line .row:hover{background:var(--paper2)}
.line .yr{font:14px/1.6 var(--mono);color:var(--ink3)}
.line .yr .mk{color:var(--ink)}
.line h3{font-weight:500;font-size:18px;margin-bottom:4px}
.line p{color:var(--ink2);font-size:14.5px;line-height:1.75}
.creds{display:grid;grid-template-columns:repeat(2,1fr);gap:0 48px;margin-top:70px}
.creds .row{display:grid;grid-template-columns:96px 1fr;gap:18px;padding:13px 0;border-top:1px solid var(--rule);font-size:15px}
.creds dt{font:11.5px/1.9 var(--mono);letter-spacing:.14em;color:var(--ink3)}
.creds dd{margin:0}

/* ---------- about ---------- */
.about-sec{padding:100px 0;background:var(--paper2)}
.about{display:grid;grid-template-columns:1fr 1.5fr;gap:70px}
.about blockquote{margin:0;font-weight:300;font-size:clamp(26px,2.6vw,40px);line-height:1.35;letter-spacing:-.025em}
.about p{margin-top:22px;color:var(--ink2);font-size:17px}

/* ---------- footer: the one yellow field ---------- */
.bfoot{background:var(--yellow);color:var(--ink);padding:80px 0 44px}
.bfoot .grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;align-items:start}
.bfoot h2{font-weight:300;font-size:clamp(32px,3.4vw,52px);letter-spacing:-.04em;line-height:1.08}
.bfoot .mail{display:block;font-size:19px;padding:12px 0;border-bottom:1.5px solid var(--ink);transition:padding-left .3s}
.bfoot .mail:hover{padding-left:8px}
.bfoot p{color:#3d3624}
.bfoot .stamp{font:12px var(--mono);letter-spacing:.14em;margin-top:18px}
.bfoot .stamp b{font-weight:700}
.bfoot .base{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;margin-top:60px;padding-top:22px;border-top:1px solid rgba(28,26,23,.25);font-size:12.5px}
.bfoot .pills .pill{color:var(--ink)}
.bfoot .pills .pill:hover{background:var(--ink);color:var(--yellow)}
.bfoot .pills .pill.seg:hover{background:transparent;color:var(--ink)}
.bfoot .pills .pill.seg .on{background:var(--ink);color:var(--yellow)}

/* ---------- case pages ---------- */
.bhead{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 36px;border-bottom:1px solid var(--rule);background:var(--paper)}
.bhead .mark{font-size:26px;letter-spacing:-.04em}
.bhead nav a.lnk{font-size:15px;margin-right:6px;border-bottom:2px solid transparent;transition:border-color .25s}
.bhead nav a.lnk:hover{border-color:var(--yellow)}
.case-hero{position:relative;min-height:74vh;display:flex;align-items:center;padding:64px 0;overflow:hidden}
.case-hero .bg{position:absolute;inset:0;background-size:cover;background-position:center}
.case-hero .card{animation:rise .9s ease both;position:relative;z-index:1;margin-left:6vw;width:min(980px,88vw);background:var(--card);padding:40px 42px 42px;box-shadow:0 30px 80px rgba(60,45,25,.16)}
.case-hero .back{display:inline-block;font-size:14px;color:var(--ink3);margin-bottom:18px}
.case-hero .case-intro{display:block}
.case-hero .case-name{font-size:14px;color:var(--ink3);margin-top:8px}
.case-hero h1{font-weight:300;font-size:clamp(34px,3.8vw,58px);line-height:1.1;letter-spacing:-.04em;margin:14px 0 18px}
.case-hero .case-intro>p{color:var(--ink2);font-size:16.5px;max-width:46em}
.hard-line{margin-top:22px;background:var(--yellow-tint);border-left:4px solid var(--yellow);font:12px/1.9 var(--mono);letter-spacing:.02em;padding:10px 14px;color:var(--ink)}
.hard-line small{color:var(--ink2);font-size:12px}
.cbody{padding:70px 0 40px}
.product-demo{margin:0 0 20px;background:var(--card);border:1px solid var(--rule);border-radius:16px;overflow:hidden}
.demo-heading{display:flex;justify-content:space-between;gap:20px;padding:15px 22px;background:var(--paper2);font:11px/1.6 var(--mono);letter-spacing:.1em;color:var(--ink2);border-bottom:1px solid var(--rule)}
.demo-controls{display:none;gap:8px;padding:14px 20px;border-bottom:1px solid var(--rule);flex-wrap:wrap}
.enhanced .demo-controls{display:flex}
.demo-controls button{font:inherit;font-size:14px;color:var(--ink2);padding:8px 16px;background:transparent;border:1.5px solid var(--rule);border-radius:999px;cursor:pointer;transition:background-color .25s,color .25s,border-color .25s}
.demo-controls button span{font:11px var(--mono);margin-right:8px;opacity:.7}
.demo-controls button[aria-pressed=true]{background:var(--yellow);color:var(--ink);border-color:var(--yellow)}
.demo-controls button:hover{border-color:var(--ink)}
.demo-panel[hidden],.real-gallery [hidden]{display:none!important}
.fallback-heading{font-size:18px;padding:12px 20px}
.enhanced .fallback-heading{display:none}
.original-shot{display:block;background:var(--paper2)}
.original-shot img{width:100%;height:auto;transition:transform .9s ease}
.original-shot:hover img{transform:scale(1.01)}
.portrait-shot{display:flex;justify-content:center;padding:26px 0}
.portrait-shot img{width:auto;max-height:620px;border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.14)}
.shot-caption{padding:24px 26px;display:flex;gap:26px;justify-content:space-between;align-items:flex-start}
.shot-date{font:11px/1.8 var(--mono);color:var(--ink3)}
.shot-caption h3{font-weight:500;font-size:22px;line-height:1.45;margin:8px 0}
.shot-caption p{font-size:15px;color:var(--ink2);max-width:760px}
.shot-hint{flex-shrink:0;font-size:12px;color:var(--ink2);border-bottom:2px solid var(--yellow);align-self:flex-start}
.product-demo figcaption{padding:14px 22px;border-top:1px solid var(--rule);font-size:12.5px;color:var(--ink3)}
.case-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;padding:34px 0;border-top:1.5px solid var(--ink);margin:50px 0 0}
.case-summary dt{font:11.5px var(--mono);letter-spacing:.14em;color:var(--ink3);margin-bottom:8px;text-transform:uppercase}
.case-summary dd{margin:0;font-size:15px;color:var(--ink2)}
.problem-section,.case-thesis{padding:70px 0 40px;max-width:980px}
.problem-section h2,.case-thesis h2{font-weight:300;font-size:clamp(28px,3vw,46px);line-height:1.2;letter-spacing:-.035em;margin:12px 0 18px}
.problem-section p,.case-thesis p{font-size:17px;color:var(--ink2)}
.decision-section{padding:30px 0 20px}
.decision-section>h2,.mech-section>h2,.findings>h2{font-weight:400;font-size:clamp(24px,2.4vw,34px);letter-spacing:-.025em;margin-bottom:10px}
.decision-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px}
.decision{background:var(--card);border:1px solid var(--rule);border-radius:16px;padding:24px;transition:transform .35s,border-color .35s}
.decision:hover{transform:translateY(-4px);border-color:var(--ink)}
.decision h3{font-weight:500;font-size:19px;line-height:1.45;margin:10px 0 8px}
.decision p{font-size:15px;color:var(--ink2)}
.mech-section{padding:60px 0 10px}
.mech-section>p{color:var(--ink3);margin-bottom:22px}
.mech{margin:0;border-top:1.5px solid var(--ink)}
.mech .row{display:grid;grid-template-columns:170px 1fr;gap:28px;padding:22px 0;border-bottom:1px solid var(--rule);transition:background-color .3s}
.mech .row:hover{background:var(--paper2)}
.mech dt{font:11.5px/1.9 var(--mono);letter-spacing:.14em;color:var(--ink3)}
.mech dd{margin:0}
.mech dd b{display:block;font-weight:500;font-size:19px;margin-bottom:6px}
.mech dd p{font-size:15.5px;color:var(--ink2)}
.mech code{font:13px var(--mono);background:var(--paper2);padding:1px 6px}
.findings{padding:60px 0 20px;max-width:980px}
.findings ol{margin:18px 0 0;padding-left:22px;font-size:16px;color:var(--ink2)}
.findings li{margin-bottom:10px}.findings li b{color:var(--ink);font-weight:500}
.before-after{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:26px}
.before-after div{border:1px solid var(--rule);border-radius:14px;padding:18px 20px;font-size:15px;background:var(--card)}
.before-after div:last-child{background:var(--yellow-tint);border-color:var(--yellow)}
.before-after span{display:block;font:11px var(--mono);letter-spacing:.14em;color:var(--ink3);margin-bottom:6px}
.disclaimer{font-size:13.5px;color:var(--ink3);border-left:3px solid var(--yellow);padding-left:14px;margin-top:28px;max-width:860px}
.stage-section{padding:60px 0 10px}
.stage-section .section-head{display:flex;justify-content:space-between;align-items:baseline;gap:20px;margin-bottom:20px}
.stage-section .section-head h2{font-weight:400;font-size:clamp(24px,2.4vw,34px);letter-spacing:-.025em}
.stage-section .section-head p{font:12px var(--mono);color:var(--ink3)}
.stage-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.stage-card{background:var(--paper2);border-radius:16px;padding:24px}
.stage-card span{font:11px var(--mono);letter-spacing:.12em;color:var(--ink3)}
.stage-card h3{font-weight:500;font-size:19px;margin:8px 0}
.stage-card p{font-size:15px;color:var(--ink2)}
.details{border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);padding:20px 0;margin:50px 0 30px}
.details summary{cursor:pointer;font-size:16px}
.details-body{padding-top:16px;max-width:900px}
.details-body h3{font-weight:500;font-size:17px;margin:14px 0 8px}
.details-body p{font-size:15px;color:var(--ink2)}
.next-case{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 0 90px}
.next-case a:first-child span{display:block;font:12px var(--mono);color:var(--ink3);margin-bottom:6px}
.next-case a:first-child strong{font-weight:300;font-size:clamp(22px,2.4vw,34px);letter-spacing:-.03em}
.next-case .button{border:1.5px solid var(--ink);border-radius:999px;padding:10px 20px;transition:background-color .25s,border-color .25s}
.next-case .button:hover{background:var(--yellow);border-color:var(--yellow)}
@keyframes rise{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* ---------- responsive / reduced motion ---------- */
@media(max-width:1000px){
  .intro,.about,.bfoot .grid,.tease.band .inner{grid-template-columns:1fr;gap:34px}
  .tease.card-over .card{grid-template-columns:1fr}
  .bento{grid-template-columns:1fr 1fr}
  .line,.creds{grid-template-columns:1fr}
  .principles,.decision-grid,.stage-grid,.case-summary{grid-template-columns:1fr}
}
@media(max-width:760px){
  .wrap{width:calc(100% - 36px)}
  .bhero .top{padding:16px 18px;flex-direction:column;gap:14px}
  .bhero .pills{justify-content:flex-start;padding:0}
  .bhero .bottom{left:18px;right:18px;bottom:24px;flex-direction:column;align-items:flex-start}
  .credits{text-align:left}
  .intro{padding:60px 0}
  .tease.card-over{min-height:auto;padding:40px 0}
  .tease.card-over .card{margin:0 16px;padding:22px;width:auto}
  .tease.band,.tease.method,.tease.figure{padding:64px 0}
  .bento{grid-template-columns:1fr}
  .shead{flex-direction:column;align-items:flex-start}
  .huge{text-align:left}.line-sub{text-align:left}
  .line .row,.creds .row{grid-template-columns:1fr;gap:4px}
  .bhead{padding:14px 18px;flex-direction:column;align-items:flex-start}
  .case-hero .card{margin:0 16px;padding:24px;width:auto}
  .mech .row{grid-template-columns:1fr;gap:6px}
  .before-after{grid-template-columns:1fr}
  .shot-caption{display:block}
  .next-case{flex-direction:column;align-items:flex-start}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .marquee .track,.sway,.tw .caret,.case-hero .card{animation:none}
  .js .reveal{opacity:1;transform:none;transition:none}
  .bcard,.decision,.card .shot img,.original-shot img,.plate img{transition:none}
}

/* ---------- weather detail page ---------- */
.wx-sec{padding:70px 0 10px}
.wx-sec>h2{font-weight:300;font-size:clamp(28px,3vw,46px);letter-spacing:-.035em;line-height:1.15;margin-bottom:8px}
.wx-sec>p.lead{color:var(--ink3);margin-bottom:24px}
.daybar{position:sticky;top:0;z-index:5;display:flex;flex-wrap:wrap;gap:8px;align-items:center;padding:14px 0;background:rgba(250,248,243,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);margin-bottom:26px}
.daybar button{font:13px var(--mono);letter-spacing:.04em;color:var(--ink2);padding:7px 13px;background:transparent;border:1.5px solid var(--rule);border-radius:999px;cursor:pointer;transition:background-color .25s,border-color .25s,color .25s}
.daybar button:hover{border-color:var(--ink)}
.daybar button[aria-pressed=true]{background:var(--yellow);border-color:var(--yellow);color:var(--ink)}
.daybar .play{margin-left:auto;border-color:var(--ink);color:var(--ink)}
.daybar .day-stamp{font:13px var(--mono);color:var(--ink);background:var(--mark);padding:0 4px}
.wx-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.wx-card{background:var(--card);border:1px solid var(--rule);border-radius:16px;overflow:hidden;display:flex;flex-direction:column;transition:border-color .3s,box-shadow .3s}
.wx-card:hover{border-color:var(--ink);box-shadow:0 18px 44px rgba(60,45,25,.10)}
.wx-card header{display:flex;justify-content:space-between;gap:12px;align-items:baseline;padding:16px 18px 10px}
.wx-card h3{font-weight:500;font-size:16px;line-height:1.4}
.wx-card .var{font:11px var(--mono);letter-spacing:.06em;color:var(--ink3);white-space:nowrap}
.sprite{display:block;width:100%;aspect-ratio:596.57/459;background-repeat:no-repeat;background-size:700% 100%;background-position:calc(var(--d,0) * 100% / 6) 0;transition:background-position .35s ease;border:0;padding:0;cursor:zoom-in;background-color:#fff}
.wx-card p{padding:12px 18px 18px;font-size:13.5px;line-height:1.8;color:var(--ink2);border-top:1px solid var(--rule)}
.spec{margin:0;border-top:1.5px solid var(--ink)}
.spec .row{display:grid;grid-template-columns:160px 1fr;gap:24px;padding:14px 0;border-bottom:1px solid var(--rule)}
.spec dt{font:12px/1.9 var(--mono);letter-spacing:.1em;color:var(--ink3)}
.spec dd{margin:0;font-size:15.5px}
.pipe{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-top:1.5px solid var(--ink);border-bottom:1px solid var(--rule)}
.pipe div{padding:18px 18px 20px;border-right:1px solid var(--rule);position:relative}
.pipe div:last-child{border-right:0}
.pipe div:not(:last-child)::after{content:"→";position:absolute;right:-9px;top:18px;background:var(--paper);font:14px var(--mono);color:var(--ink3)}
.pipe span{font:11px var(--mono);letter-spacing:.14em;color:var(--ink3)}
.pipe b{display:block;font-weight:500;font-size:18px;margin:6px 0 4px}
.pipe small{font-size:13px;color:var(--ink2)}
.pipe-total{margin-top:14px;font:13px var(--mono)}
.limits{margin:0;padding-left:20px;color:var(--ink2);font-size:15.5px}
.limits li{margin-bottom:8px}
.wx-credits{margin-top:26px;font-size:12.5px;color:var(--ink3)}
.lb{position:fixed;inset:0;z-index:50;background:rgba(250,248,243,.97);display:flex;align-items:center;justify-content:center;padding:24px}
.lb[hidden]{display:none}
.lb-inner{width:min(1100px,100%)}
.lb-top{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px}
.lb-top b{font-weight:500;font-size:17px}
.lb-top button,.lb-nav button{font:inherit;font-size:14px;background:transparent;border:1.5px solid var(--ink);border-radius:999px;padding:7px 16px;cursor:pointer}
.lb-top button:hover,.lb-nav button:hover{background:var(--yellow);border-color:var(--yellow)}
.lb .sprite{cursor:default;max-height:78vh;border:1px solid var(--rule);border-radius:12px}
.lb-nav{display:flex;justify-content:space-between;gap:12px;margin-top:12px}
@media(max-width:1000px){.wx-grid{grid-template-columns:1fr 1fr}.pipe{grid-template-columns:1fr 1fr}}
@media(max-width:760px){.wx-grid{grid-template-columns:1fr}.spec .row{grid-template-columns:1fr;gap:4px}.pipe{grid-template-columns:1fr}.pipe div{border-right:0;border-bottom:1px solid var(--rule)}.pipe div::after{display:none}.daybar .play{margin-left:0}}
@media(prefers-reduced-motion:reduce){.sprite{transition:none}}

/* ---------- r14: off hours ---------- */
.off-sec{padding:100px 0 60px}
.vg{padding:44px 0 60px;border-top:1px solid var(--rule)}
.vg h3{font-weight:300;font-size:clamp(30px,3.2vw,48px);line-height:1.12;letter-spacing:-.035em;margin:10px 0 16px}
.vg p{font-size:17px;line-height:1.9;color:var(--ink2);max-width:36em;margin-bottom:12px}
.vg .credit{margin-top:14px;font-size:11.5px;line-height:1.7;color:var(--ink3)}
.vg .credit a{border-bottom:1px solid var(--rule)}
.vg figure{margin:0}
.vg img{width:100%;object-fit:cover;border-radius:14px;box-shadow:0 26px 60px rgba(60,45,25,.14);transition:transform 1.1s ease}
.vg figure:hover img{transform:scale(1.015)}
.vg.wide .pano img{aspect-ratio:3/1}
.vg.wide .under{display:grid;grid-template-columns:1.25fr 1fr;gap:56px;margin-top:40px;align-items:start}
.vg.wide .under img{aspect-ratio:4/3}
.vg.split{display:grid;grid-template-columns:1fr 1.05fr;gap:64px;align-items:center}
.vg.split.rev .pics{order:2}
.pics{position:relative;padding-bottom:48px}
.pics .main{width:84%}
.vg.split.rev .pics .main{margin-left:auto}
.pics .inset{position:absolute;right:0;bottom:0;width:46%}
.vg.split.rev .pics .inset{right:auto;left:0}
.pics .inset img{border:6px solid var(--paper)}
.ar45{aspect-ratio:4/5}.ar43{aspect-ratio:4/3}.ar32{aspect-ratio:3/2}.ar23{aspect-ratio:2/3}
.papers{list-style:none;margin:18px 0 6px;padding:0;border-top:1.5px solid var(--ink);max-width:40em}
.papers li{padding:12px 0;border-bottom:1px solid var(--rule);font-size:15px;line-height:1.7}
.papers li b{font-weight:500}
.papers .src{font:12px/1.9 var(--mono);color:var(--ink3)}
.papers .src .mk{color:var(--ink)}
.papers .src a{border-bottom:1px solid var(--rule);color:var(--ink2)}
a.arch{border-bottom:1px solid currentColor}
/* ---------- r14: language switch stands out on the video hero ---------- */
.onvideo .pill.seg{background:var(--yellow);border-color:var(--yellow);color:var(--ink);box-shadow:0 8px 22px rgba(20,16,12,.3)}
.onvideo .pill.seg .on{background:var(--ink);color:var(--yellow)}
.onvideo .pill.seg:hover{background:#FFD84D;color:var(--ink)}
/* ---------- r14: /cv/ ---------- */
.cvpage{background:var(--paper)}
.cvbar{display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 36px;border-bottom:1px solid var(--rule)}
.cvbar .mark{font-size:22px;letter-spacing:-.04em}
.cvbar .go{background:var(--yellow);border-color:var(--yellow);font-weight:500}
.cvbar .go:hover{background:var(--ink);border-color:var(--ink);color:var(--yellow)}
.cv{display:grid;grid-template-columns:.95fr 1.3fr;gap:64px;padding:34px 0 18px}
.cv h1{font-weight:300;font-size:clamp(40px,4vw,60px);letter-spacing:-.045em;line-height:1.05;margin:10px 0 10px}
.cv h1 span{display:block;font-size:.42em;letter-spacing:.02em;color:var(--ink3);margin-top:6px}
.cv .role{font-size:16px;line-height:1.6;margin-bottom:18px}
.values{list-style:none;padding:0;margin:0 0 18px;counter-reset:v}
.values li{counter-increment:v;padding:9px 0 9px 34px;border-top:1px solid var(--rule);position:relative;font-size:14.5px;line-height:1.6;color:var(--ink2)}
.values li::before{content:counter(v,decimal-leading-zero);position:absolute;left:0;top:10px;font:11px var(--mono);color:var(--ink3)}
.values li b{display:block;font-weight:500;color:var(--ink);font-size:16px}
.cv .chips{display:flex;flex-wrap:wrap;gap:8px;margin:4px 0 16px}
.cv .chips span{font-size:12.5px;border:1px solid var(--ink);border-radius:999px;padding:4px 11px}
.mails{display:flex;flex-wrap:wrap;gap:6px 18px;font:13px var(--mono)}
.mails a{border-bottom:2px solid var(--yellow)}
.cvh{font:11.5px var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--ink3);margin:0 0 6px;padding-top:4px}
.cvline{margin:0 0 18px;border-top:1.5px solid var(--ink)}
.cvline .row{display:grid;grid-template-columns:104px 1fr;gap:14px;padding:7px 0;border-bottom:1px solid var(--rule)}
.cvline dt{font:12.5px/1.7 var(--mono);color:var(--ink3)}
.cvline dd{margin:0;font-size:14px;line-height:1.55}
.cvline dd b{font-weight:500;display:block}
.cvline dd span{color:var(--ink2);font-size:13px}
.cvworks{list-style:none;margin:0 0 18px;padding:0;border-top:1.5px solid var(--ink)}
.cvworks li{border-bottom:1px solid var(--rule)}
.cvworks a{display:flex;justify-content:space-between;align-items:baseline;gap:14px;padding:8px 0;transition:background-color .25s}
.cvworks a:hover{background:var(--paper2)}
.cvworks b{font-weight:500;font-size:14.5px}
.cvworks .mk{font:12px var(--mono);white-space:nowrap}
.cvcreds{font-size:13px;line-height:1.75;color:var(--ink2);border-top:1.5px solid var(--ink);padding-top:8px}
.cvfoot{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:12px;color:var(--ink3);padding:12px 0 22px;border-top:1px solid var(--rule)}
@media(max-width:1000px){.cv{grid-template-columns:1fr;gap:28px}.cvworks a{display:block}.cvworks .mk{white-space:normal}}
@media(max-width:760px){.cvbar{padding:14px 18px}.cvbar .mark{font-size:18px;white-space:nowrap}.cvline .row{grid-template-columns:1fr;gap:2px}}
@media print{.cvbar .pills{display:none}.cvbar{border:0;padding:0 0 8px}body{background:#fff}.cv{gap:28px;padding-top:10px}.cvworks a:hover{background:none}@page{size:A4;margin:12mm}}
/* ---------- r14: archive ---------- */
.arch-h{font-weight:300;font-size:clamp(40px,5vw,72px);letter-spacing:-.045em;margin:10px 0 12px}
.arch-p{color:var(--ink2);max-width:46em;margin-bottom:26px}
.arch-p.small{font-size:13px;color:var(--ink3);margin-top:22px}
.arch-list a{border-bottom:3px solid var(--yellow)}
@media(max-width:1000px){.vg.wide .under,.vg.split{grid-template-columns:1fr;gap:30px}.vg.split.rev .pics{order:0}}

/* ---------- r16: h1 headline, credits, phone nav, plain line, reveal timing ---------- */
.bhero h1.hl{margin:0;font:inherit;letter-spacing:inherit;line-height:inherit}
.credits .cr-short{display:none;color:#fff;border-bottom:1px solid rgba(255,255,255,.65)}
.crfoot{font:11.5px/1.75 var(--mono);letter-spacing:.02em;opacity:.8;padding-top:18px}
.crfoot b{font-weight:600}
.lbl-s{display:none}
.case-hero .case-intro>p.plain{margin:16px 0 12px;font-size:17.5px;line-height:1.75;color:var(--ink);max-width:40em}
.case-intro .plain .pl-k{display:inline-block;margin-right:10px;padding:0 8px;font:12px/1.9 var(--mono);letter-spacing:.08em;background:var(--yellow);color:var(--ink);vertical-align:2px}
@media (prefers-reduced-motion: no-preference){.js .reveal{transform:translateY(12px);transition:opacity .5s ease,transform .5s ease}}
@media(max-width:760px){
  .credits .cr-long{display:none}
  .credits .cr-short{display:inline}
  .bhero .pills{gap:6px}
  .bhero .pill{padding:5px 10px;font-size:14px}
  .bhero .pill.seg{padding:0}
  .bhero .pill.seg>*{padding:5px 8px}
}
@media(max-width:420px){.bhero .lbl-l{display:none}.bhero .lbl-s{display:inline}}

/* ---------- r17: name above the claim, calmer wordmark, CJK display type ---------- */
.bhero .mark{font-size:clamp(24px,2.3vw,34px);letter-spacing:-.035em;line-height:1}
.hlbox{display:flex;flex-direction:column;gap:14px;min-width:0}
.hl-name{margin:0;font:500 15px/1.4 var(--sans);letter-spacing:.14em;color:#fff;text-shadow:0 1px 10px rgba(20,16,12,.45)}
.hl-name::before{content:"";display:inline-block;width:28px;height:2px;margin-right:12px;vertical-align:middle;background:var(--yellow)}
.headline{text-decoration:none}
:lang(zh) .headline{letter-spacing:0}
.headline .hk{background:linear-gradient(180deg,transparent 82%,var(--yellow) 82%,var(--yellow) 94%,transparent 94%);-webkit-box-decoration-break:clone;box-decoration-break:clone}
:lang(en) .bhero .headline{font-size:clamp(34px,4.9vw,76px)}
.bhero .credits{max-width:38em}
.credits .cr-i{white-space:nowrap}
@media(max-width:1100px){.credits .cr-long{display:none}.credits .cr-short{display:inline}}
@media(max-width:760px){.hl-name{font-size:13px;letter-spacing:.1em}.hl-name::before{width:20px;margin-right:10px}.bhero .credits{max-width:none}}

/* ---------- r18: numbered marks on original Chinese screenshots (English pages) ---------- */
.pinbox{position:relative;display:block}
.pinbox .pin{position:absolute;transform:translate(-50%,-50%);width:26px;height:26px;border-radius:50%;background:var(--yellow);color:var(--ink);font:600 13px/26px var(--mono);text-align:center;box-shadow:0 0 0 3px rgba(28,26,23,.85),0 6px 16px rgba(0,0,0,.3);pointer-events:none}
.pin-note{margin:14px 0 8px;font-size:13.5px;color:var(--ink3)}
.pin-legend{margin:0;padding:0;list-style:none;counter-reset:pin;display:grid;gap:6px}
.pin-legend li{counter-increment:pin;display:grid;grid-template-columns:24px 1fr;gap:10px;font-size:14.5px;line-height:1.6;color:var(--ink2)}
.pin-legend li::before{content:counter(pin);width:22px;height:22px;border-radius:50%;background:var(--yellow);color:var(--ink);font:600 12px/22px var(--mono);text-align:center;margin-top:2px}
@media(max-width:760px){.pinbox .pin{width:20px;height:20px;font-size:11px;line-height:20px;box-shadow:0 0 0 2px rgba(28,26,23,.85)}}

/* ---------- r19: living footer stamp: turning ring, Beijing time (UTC+8), date of the last release ---------- */
.bfoot .stamp{display:flex;align-items:center;gap:14px;line-height:1.65}
.stamp .ring{position:relative;flex:none;width:60px;height:60px;display:grid;place-items:center}
.stamp .ring svg{position:absolute;inset:0;width:100%;height:100%;overflow:visible;animation:stampspin 30s linear infinite}
.stamp .ring text{font:600 5.2px var(--mono);letter-spacing:.214em;fill:#3d3624}
.stamp .ring>span{width:26px;height:26px;border-radius:50%;background:var(--ink);color:var(--yellow);display:grid;place-items:center;font:14px/1 Georgia,"Times New Roman",serif}
.stamp .st-txt{display:flex;flex-direction:column}
.stamp .st-upd{opacity:.72;text-transform:uppercase}
.stamp .clk i{font-style:normal;animation:stampblink 1s steps(1,end) infinite}
@keyframes stampspin{to{transform:rotate(360deg)}}
@keyframes stampblink{50%{opacity:0}}
@media(prefers-reduced-motion:reduce){.stamp .ring svg,.stamp .clk i{animation:none}}

/* r21: education and feedback, without changing the frozen editions. */
.facts .degree-badge{font-weight:600;background:var(--yellow);color:var(--ink);padding:2px 7px}
.degree-detail{font-size:15px;line-height:1.65;color:var(--ink2);margin:12px 0 8px}.degree-detail span{display:block}
.cv-education{margin:8px 0 14px;font-size:13px;line-height:1.6}
.cv-education span{display:block}.cv-education b{font-weight:600;background:var(--yellow);padding:2px 7px;line-height:1.8}.cv-education span{color:var(--ink2);margin-top:3px}
.cv-education strong,.degree-detail strong{font-weight:600;color:var(--ink)}
.contact-feedback{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 22px;border:1px solid var(--ink);border-radius:999px;background:var(--ink);color:var(--yellow);font-size:16px;font-weight:500;line-height:1.4;transition:background .2s,color .2s}
.contact-feedback:hover{background:transparent;color:var(--ink)}.contact-feedback:focus-visible{outline:3px solid var(--ink);outline-offset:4px}
.bfoot .contact-hint{font-size:13px;margin:8px 0 12px}.cv-contact{margin:0 0 10px}.cv-contact .contact-feedback{font-size:14px;min-height:40px;padding:8px 18px;background:var(--yellow);color:var(--ink);border-color:var(--yellow)}.cv-contact .contact-feedback:hover{background:var(--ink);color:var(--yellow);border-color:var(--ink)}
.feedback-link{font-size:14px;margin-top:18px;margin-bottom:20px}.feedback-link a{border-bottom:2px solid var(--yellow)}
@media print{.feedback-link{display:none}}