/* ─── xinfuture — design tokens ──────────────────────────────────────── */
:root{
  --bg:        #F4F1EA;
  --bg-2:      #EDE9DF;
  --ink:       #15171C;
  --ink-soft:  #383B43;
  --ink-mute:  #7A7C82;
  --rule:      rgba(21,23,28,.14);
  --rule-soft: rgba(21,23,28,.07);
  --accent:    #2D5BFF;
  --accent-ink:#0E2BB5;
  --accent-tint: rgba(45,91,255,.08);

  --serif: "Instrument Serif", "Noto Serif SC", "EB Garamond", Georgia, serif;
  --sans:  "Geist", "Noto Sans SC", ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono:  "Geist Mono", "JetBrains Mono", ui-monospace, monospace;

  --rad-s: 6px;
  --rad-m: 14px;
  --rad-l: 22px;

  --pad: clamp(24px, 4vw, 80px);
  --maxw: 1440px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.55;
  font-feature-settings:"ss01","cv11";
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;
}

/* paper grain — barely there */
body::before{
  content:"";
  position:fixed;inset:0;pointer-events:none;z-index:1;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.06 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode:multiply;opacity:.55;
}

a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}

/* ─── shared atoms ──────────────────────────────────────────────────── */
.eyebrow{
  font-family:var(--mono);
  font-size:11px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--ink-mute);
  font-weight:500;
}
.rule{height:1px;background:var(--rule);width:100%}
.rule-soft{height:1px;background:var(--rule-soft);width:100%}

.display{
  font-family:var(--serif);
  font-weight:400;
  letter-spacing:-0.015em;
  line-height:.95;
  font-size:clamp(56px, 8.4vw, 148px);
}
.display em{font-style:italic;color:var(--accent)}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;
  font-family:var(--sans);font-size:14px;font-weight:500;
  border-radius:999px;
  cursor:default;user-select:none;
  transition:transform .25s ease, background .25s ease, color .25s ease, border-color .25s ease;
  letter-spacing:-.005em;
}
.btn .arr{
  width:18px;height:1px;background:currentColor;position:relative;display:inline-block;
  transition:width .25s ease;
}
.btn .arr::after{
  content:"";position:absolute;right:0;top:50%;
  width:7px;height:7px;border-top:1px solid currentColor;border-right:1px solid currentColor;
  transform:translateY(-50%) rotate(45deg);
}
.btn:hover .arr{width:26px}
.btn-primary{background:var(--accent);color:#fff;border:1px solid var(--accent)}
.btn-primary:hover{background:var(--accent-ink);border-color:var(--accent-ink)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid var(--ink)}
.btn-ghost:hover{background:var(--ink);color:var(--bg)}

/* ─── nav ───────────────────────────────────────────────────────────── */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--pad);
  background:linear-gradient(to bottom, rgba(244,241,234,.85), rgba(244,241,234,0));
  backdrop-filter:blur(8px);
}
.nav .logo{font-family:var(--serif);font-size:22px;letter-spacing:-0.02em}
.nav .logo em{color:var(--accent);font-style:italic}
.nav .logo-img{max-height:28px;width:auto;object-fit:contain}
.nav .links{display:flex;gap:36px;font-size:13px;color:var(--ink-soft)}
.nav .links a{position:relative}
.nav .links a::after{
  content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:var(--ink);
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.nav .links a:hover::after{transform:scaleX(1)}
.nav .lang{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--ink-mute);user-select:none;white-space:nowrap;flex-shrink:0;display:inline-flex;align-items:center;gap:0}
.nav .lang span.on{color:var(--ink)}
.nav .lang span.off{color:var(--ink-mute);transition:color .25s ease}
.nav .lang span.off:hover{color:var(--ink-soft)}

/* Chinese-mode display tweaks: serif headings switch to Noto Serif SC and tighten */
body.is-zh .display,
body.is-zh .hero-tag h1,
body.is-zh .section-head h2,
body.is-zh .wwd-col h3,
body.is-zh .case h4,
body.is-zh .about-left .stmt,
body.is-zh .contact h4,
body.is-zh .wwd-bridge,
body.is-zh .insight .ttl,
body.is-zh .about-left .meta-grid .val{
  font-family:"Noto Serif SC","Instrument Serif",serif;
  letter-spacing:0;
}
body.is-zh .hero-tag h1{font-size:clamp(48px,7.6vw,128px);line-height:1.05}
body.is-zh .display em,
body.is-zh .hero-tag h1 em,
body.is-zh .hero-tag h1 .blue,
body.is-zh .section-head h2 em,
body.is-zh .wwd-col h3 em,
body.is-zh .case h4 em,
body.is-zh .about-left .stmt em,
body.is-zh .contact h4 em{
  font-style:normal;font-weight:500;
}
body.is-zh .wwd-bridge{font-style:normal;font-weight:400}
body.is-zh .about-left .stmt .lead{font-style:normal;font-weight:500}

/* ─── section scaffolding ───────────────────────────────────────────── */
section{position:relative;z-index:2}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 var(--pad)}

.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:40px;padding-top:96px;padding-bottom:48px;
  border-top:1px solid var(--rule);
}
.section-head .idx{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--ink-mute);text-transform:uppercase}
.section-head h2{
  font-family:var(--serif);font-weight:400;font-size:clamp(36px,4.6vw,72px);
  line-height:1;letter-spacing:-.015em;margin:0;
}
.section-head h2 em{font-style:italic;color:var(--accent)}
.section-head .right{font-size:13px;color:var(--ink-mute);max-width:280px;text-align:right}

/* ─── HERO ──────────────────────────────────────────────────────────── */
.hero{
  position:relative;height:100vh;min-height:720px;
  display:flex;flex-direction:column;
  padding:0 var(--pad) clamp(48px, 8vh, 96px);
  overflow:hidden;
}
.hero canvas{position:absolute;inset:0;z-index:0;width:100%;height:100%;display:block}
.hero-mask{
  position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse at 50% 55%, transparent 0%, rgba(244,241,234,.55) 55%, var(--bg) 92%);
}
.hero-meta{
  position:relative;z-index:2;
  display:flex;justify-content:space-between;align-items:flex-start;
  padding-top:108px;
}
.hero-meta .coords{font-family:var(--mono);font-size:11px;color:var(--ink-mute);letter-spacing:.14em;line-height:1.7}
.hero-meta .coords b{color:var(--ink);font-weight:500}
.hero-meta .ticker{font-family:var(--mono);font-size:11px;color:var(--ink-mute);letter-spacing:.14em;text-align:right}
.hero-meta .ticker .dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--accent);margin-right:8px;vertical-align:middle;animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.3;transform:scale(.8)}}

.hero-tag{
  position:relative;z-index:2;max-width:1200px;
  flex:1;display:flex;flex-direction:column;justify-content:center;
  padding:32px 0;
}
.hero-tag .lead{
  font-family:var(--mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-mute);margin-bottom:28px;display:flex;align-items:center;gap:14px;
}
.hero-tag .lead::before{content:"";display:inline-block;width:36px;height:1px;background:var(--ink)}
.hero-tag h1{
  margin:0 0 40px;
  font-family:var(--serif);font-weight:400;
  font-size:clamp(56px, 9vw, 168px);
  line-height:.92;letter-spacing:-0.022em;
  color:var(--ink);
}
.hero-tag h1 em{font-style:italic}
.hero-tag h1 .blue{color:var(--accent);font-style:italic}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:36px}
.hero-ctas .small{margin-left:14px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:var(--ink-mute);text-transform:uppercase}

/* ─── WHAT WE DO ────────────────────────────────────────────────────── */
.wwd{padding-bottom:120px}
.wwd-split{
  display:grid;grid-template-columns:1fr 1fr;
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
}
.wwd-col{
  padding:64px 48px 72px;position:relative;
  display:flex;flex-direction:column;gap:32px;min-height:560px;
}
.wwd-col + .wwd-col{border-left:1px solid var(--rule)}
.wwd-col .num{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--ink-mute);text-transform:uppercase}
.wwd-col h3{
  font-family:var(--serif);font-weight:400;font-size:clamp(32px,3.4vw,52px);
  line-height:1.02;letter-spacing:-.01em;margin:0;
}
.wwd-col h3 em{font-style:italic;color:var(--accent)}
.wwd-col p{color:var(--ink-soft);font-size:15px;max-width:46ch;margin:0}
.wwd-col .stage{flex:1;display:flex;align-items:center;justify-content:center;min-height:300px;position:relative}
.wwd-col .tags{display:flex;gap:8px;flex-wrap:wrap;margin-top:auto}
.wwd-col .tag{
  font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;
  padding:6px 10px;border:1px solid var(--rule);border-radius:999px;color:var(--ink-soft);
}

.wwd-bridge{
  text-align:center;padding:64px 0 32px;
  font-family:var(--serif);font-style:italic;font-weight:400;
  font-size:clamp(22px,2.4vw,36px);line-height:1.3;letter-spacing:-.01em;
  color:var(--ink);
}
.wwd-bridge .accent{color:var(--accent)}
.wwd-bridge .mark{display:inline-block;margin:0 14px;color:var(--ink-mute)}

/* ─── PROOF ─────────────────────────────────────────────────────────── */
.proof{padding-bottom:120px}
.proof-tabs{margin-bottom:32px}
.tabs-row{
  display:flex;align-items:flex-end;gap:0;
  border-bottom:1px solid var(--rule);
}
.tab{
  appearance:none;background:transparent;border:0;padding:18px 28px 18px 0;
  display:flex;flex-direction:column;align-items:flex-start;gap:4px;
  cursor:default;color:var(--ink-mute);
  border-bottom:2px solid transparent;margin-bottom:-1px;
  transition:color .25s ease, border-color .25s ease;
  text-align:left;
}
.tab .tnum{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.tab .tlbl{font-family:var(--serif);font-size:32px;line-height:1;letter-spacing:-.01em;color:var(--ink-mute);font-weight:400}
.tab .thint{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--ink-mute);text-transform:uppercase;opacity:0;transform:translateY(-4px);transition:opacity .25s ease, transform .25s ease}
.tab.on{color:var(--ink);border-bottom-color:var(--ink)}
.tab.on .tlbl{color:var(--ink)}
.tab.on .tnum{color:var(--accent)}
.tab.on .thint{opacity:1;transform:none;color:var(--ink-soft)}
.tab:hover:not(.on) .tlbl{color:var(--ink-soft)}
.tabs-spacer{flex:1}
.tabs-all{
  align-self:center;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-soft);padding:8px 0;
}
.tabs-all:hover{color:var(--accent)}

.proof-scroll{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;
  padding-bottom:24px;scrollbar-width:thin;
  scrollbar-color:var(--rule) transparent;
  margin:0 calc(var(--pad) * -1) 0 0;
  padding-right:var(--pad);
}
.proof-scroll::-webkit-scrollbar{height:6px}
.proof-scroll::-webkit-scrollbar-track{background:transparent}
.proof-scroll::-webkit-scrollbar-thumb{background:var(--rule);border-radius:3px}

.case{
  flex:0 0 460px;scroll-snap-align:start;
  background:var(--bg-2);border-radius:var(--rad-l);
  padding:28px 28px 24px;
  display:flex;flex-direction:column;gap:20px;
  border:1px solid var(--rule-soft);
  transition:transform .3s ease, background .3s ease;
}
.case:hover{transform:translateY(-4px);background:#fff}
.case .head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px}
.case .client{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
.case h4{font-family:var(--serif);font-weight:400;font-size:28px;line-height:1.1;letter-spacing:-.01em;margin:6px 0 0}
.case h4 em{font-style:italic;color:var(--accent)}
.case .viz{
  height:170px;background:#fff;border-radius:var(--rad-m);
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--rule-soft);overflow:hidden;position:relative;
}
.case .stages{display:grid;grid-template-columns:1fr 1fr 1fr;gap:0;border-top:1px solid var(--rule)}
.case .stages .col{padding:14px 0 0;display:flex;flex-direction:column;gap:6px}
.case .stages .col + .col{border-left:1px solid var(--rule);padding-left:12px}
.case .stages .col:not(:last-child){padding-right:12px}
.case .stages .lbl{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.case .stages .txt{font-size:12.5px;color:var(--ink);line-height:1.45}
.case .stages .txt strong{color:var(--accent);font-weight:500}
.case .foot{display:flex;justify-content:space-between;align-items:center;padding-top:6px}
.case .metric{font-family:var(--serif);font-size:34px;line-height:1;letter-spacing:-.02em}
.case .metric em{font-style:italic;color:var(--accent)}
.case .metric-lbl{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);margin-top:6px}

.proof-side h5{
  font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-mute);margin:0 0 24px;font-weight:500;
}

/* large insight cards (used in tab-2 horizontal scroller) */
.insight-card{
  flex:0 0 460px;scroll-snap-align:start;
  background:#fff;border:1px solid var(--rule-soft);border-radius:var(--rad-l);
  padding:32px 32px 26px;display:flex;flex-direction:column;gap:18px;
  transition:transform .3s ease, border-color .3s ease;
  color:inherit;text-decoration:none;
  min-height:340px;
}
.insight-card:hover{transform:translateY(-4px);border-color:var(--accent)}
.insight-card .ic-head{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
.insight-card .ic-num{
  font-family:var(--serif);font-size:42px;line-height:.9;letter-spacing:-.02em;color:var(--accent);
  font-style:italic;
}
.insight-card .ic-meta{
  display:flex;align-items:center;gap:6px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);
  margin-top:6px;
}
.insight-card .ic-kind{color:var(--ink)}
.insight-card .ic-date{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);margin-top:6px}
.insight-card .ic-ttl{
  font-family:var(--serif);font-size:30px;line-height:1.12;letter-spacing:-.01em;
  font-weight:400;margin:0;color:var(--ink);
}
.insight-card .ic-excerpt{
  font-size:14px;color:var(--ink-soft);line-height:1.55;margin:0;flex:1;
}
.insight-card .ic-foot{padding-top:6px;border-top:1px solid var(--rule)}
.insight-card .ic-cta{
  font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink);display:inline-flex;align-items:center;gap:8px;padding-top:14px;
}
.insight-card .ic-cta .arr-r{transition:transform .25s ease}
.insight-card:hover .ic-cta{color:var(--accent)}
.insight-card:hover .ic-cta .arr-r{transform:translateX(6px)}

.insight{
  display:block;padding:20px 0;border-top:1px solid var(--rule);
  transition:padding .25s ease;
}
.insight:last-of-type{border-bottom:1px solid var(--rule)}
.insight .meta{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;color:var(--ink-mute);text-transform:uppercase;display:flex;justify-content:space-between;margin-bottom:10px}
.insight .ttl{font-family:var(--serif);font-size:22px;line-height:1.2;letter-spacing:-.005em;color:var(--ink);transition:color .25s ease}
.insight:hover .ttl{color:var(--accent)}
.insight .arr-r{display:inline-block;margin-left:8px;transition:transform .25s ease}
.insight:hover .arr-r{transform:translateX(4px)}
.proof-side .all-insights{
  margin-top:24px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;
  text-transform:uppercase;color:var(--ink-soft);display:inline-flex;align-items:center;gap:8px;
}
.proof-side .all-insights:hover{color:var(--accent)}

.scroll-hint{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:8px;font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--ink-mute);
}
.scroll-hint .bar{flex:1;height:1px;background:var(--rule);margin:0 16px;position:relative;overflow:hidden}
.scroll-hint .bar i{position:absolute;top:0;bottom:0;background:var(--ink);transition:left .2s ease, width .2s ease}

/* ─── ABOUT / CONNECT ───────────────────────────────────────────────── */
.about{padding-bottom:80px}
.about-grid{
  display:grid;grid-template-columns:1.2fr 1fr;gap:96px;
  padding-top:80px;padding-bottom:80px;
}
.about-left .stmt{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(28px, 3vw, 48px);
  line-height:1.18;letter-spacing:-.012em;
  color:var(--ink);max-width:22ch;margin:0;
}
.about-left .stmt em{font-style:italic;color:var(--accent)}
.about-left .stmt .lead{font-style:italic}
.about-left .meta-grid{
  margin-top:64px;display:grid;grid-template-columns:repeat(3,1fr);gap:32px;
  border-top:1px solid var(--rule);padding-top:32px;max-width:560px;
}
.about-left .meta-grid .lbl{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:8px}
.about-left .meta-grid .val{font-family:var(--serif);font-size:22px;line-height:1.1;letter-spacing:-.01em}

.contact{
  background:var(--bg-2);border:1px solid var(--rule-soft);border-radius:var(--rad-l);
  padding:36px;display:flex;flex-direction:column;gap:18px;
}
.contact h4{font-family:var(--serif);font-weight:400;font-size:32px;letter-spacing:-.01em;margin:0 0 4px;line-height:1}
.contact h4 em{font-style:italic;color:var(--accent)}
.contact .sub{font-size:13.5px;color:var(--ink-soft);margin-bottom:8px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
.field input,.field textarea{
  font:14px var(--sans);color:var(--ink);background:transparent;
  border:0;border-bottom:1px solid var(--rule);
  padding:10px 0;outline:none;resize:none;width:100%;
  transition:border-color .25s ease;
}
.field textarea{min-height:84px}
.field input:focus,.field textarea:focus{border-color:var(--accent)}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-mute)}
.contact .row{display:flex;align-items:center;gap:16px;margin-top:6px}
.contact .send{
  flex:1;padding:14px 20px;border-radius:999px;background:var(--ink);color:var(--bg);
  border:1px solid var(--ink);font-size:13.5px;cursor:default;display:flex;align-items:center;justify-content:center;gap:10px;
  transition:background .25s ease, color .25s ease;
}
.contact .send:hover{background:var(--accent);color:#fff;border-color:var(--accent)}
.contact .qr{
  width:96px;height:96px;border-radius:12px;background:#fff;
  display:flex;align-items:center;justify-content:center;
  border:1px solid var(--rule);position:relative;flex:0 0 auto;
}
.contact .qr svg{width:78%;height:78%;display:block}
.contact .qr-lbl{font-family:var(--mono);font-size:9.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);text-align:center;line-height:1.4}
.contact .qrwrap{display:flex;flex-direction:column;align-items:center;gap:8px}

.foot{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid var(--rule);padding:28px 0;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);
}
.foot .marks{display:flex;gap:24px}

/* ─── responsive ────────────────────────────────────────────────────── */
/* ─── detail pages (case / article / insights index) ─────────────────── */
.detail-nav{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px var(--pad);background:rgba(244,241,234,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--rule);
}
.detail-nav .logo{font-family:var(--serif);font-size:20px;letter-spacing:-0.02em}
.detail-nav .logo em{color:var(--accent);font-style:italic}
.detail-nav .logo-img{max-height:24px;width:auto;object-fit:contain}
.detail-nav .back{
  font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);
  display:inline-flex;align-items:center;gap:8px;
}
.detail-nav .back:hover{color:var(--accent)}
.detail-nav .lang{font-family:var(--mono);font-size:11px;letter-spacing:.12em;color:var(--ink-mute);user-select:none;white-space:nowrap;display:inline-flex;align-items:center;gap:0}
.detail-nav .lang span.on{color:var(--ink)}

/* Case detail */
.case-page{padding:64px 0 96px}
.case-head{display:grid;grid-template-columns:1fr 1fr;gap:64px;padding-top:32px;padding-bottom:64px;align-items:flex-end}
.case-head .left .eyebrow{margin-bottom:18px}
.case-head .left .client{font-family:var(--mono);font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:24px}
.case-head h1{
  font-family:var(--serif);font-weight:400;font-size:clamp(48px,6vw,100px);line-height:.96;letter-spacing:-.02em;margin:0;
}
.case-head h1 em{font-style:italic;color:var(--accent)}
.case-head .right .scope-grid{display:grid;grid-template-columns:1fr;gap:18px;border-top:1px solid var(--rule);padding-top:24px}
.case-head .right .scope-grid > div{display:grid;grid-template-columns:120px 1fr;gap:24px;align-items:baseline}
.case-head .right .scope-grid .lbl{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.case-head .right .scope-grid .val{font-family:var(--serif);font-size:18px;letter-spacing:-.005em}

.case-viz-band{
  height:280px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(180deg, transparent 0%, rgba(45,91,255,.02) 100%);
  margin-bottom:80px;position:relative;overflow:hidden;
}
.case-viz-band > div{width:min(720px,86%);}
.case-viz-band .metric-overlay{
  position:absolute;left:var(--pad);bottom:18px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);
}

.case-intro{
  font-family:var(--serif);font-style:italic;font-weight:400;
  font-size:clamp(22px,2.4vw,34px);line-height:1.35;letter-spacing:-.005em;
  max-width:32ch;margin:0 auto 96px;text-align:center;color:var(--ink);
}
body.is-zh .case-intro{font-style:normal;font-family:"Noto Serif SC","Instrument Serif",serif}

.case-body{display:grid;grid-template-columns:200px 1fr;gap:80px;max-width:980px;margin:0 auto}
.case-body section{padding-bottom:72px;border-bottom:1px solid var(--rule);margin-bottom:72px}
.case-body section:last-of-type{border-bottom:0}
.case-body .sec-num{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.case-body .sec-lbl{font-family:var(--serif);font-size:24px;letter-spacing:-.005em;margin-top:8px}
.case-body .sec-body{font-size:16px;line-height:1.7;color:var(--ink-soft);max-width:62ch}
.case-body .sec-body p{margin:0 0 16px}

.pull-quote{
  max-width:880px;margin:0 auto 96px;padding:64px 32px;
  border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  text-align:center;
}
.pull-quote q{
  font-family:var(--serif);font-style:italic;font-weight:400;
  font-size:clamp(24px,2.8vw,38px);line-height:1.3;letter-spacing:-.01em;
  display:block;quotes:"“" "”";color:var(--ink);
}
body.is-zh .pull-quote q{font-style:normal;font-family:"Noto Serif SC",serif;quotes:"「" "」"}
.pull-quote .author{margin-top:24px;font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}

.deliverables{max-width:980px;margin:0 auto 80px;display:grid;grid-template-columns:200px 1fr;gap:80px}
.deliverables h5{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);margin:0;font-weight:500}
.deliverables ul{margin:0;padding:0;list-style:none}
.deliverables li{
  display:flex;align-items:center;gap:16px;padding:16px 0;border-top:1px solid var(--rule);
  font-family:var(--serif);font-size:22px;letter-spacing:-.005em;
}
.deliverables li:last-child{border-bottom:1px solid var(--rule)}
.deliverables li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;flex:0 0 auto}

.next-case{
  max-width:1180px;margin:0 auto;padding:48px 0;border-top:1px solid var(--rule);
  display:flex;justify-content:space-between;align-items:center;
}
.next-case .lbl{font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.next-case h3{font-family:var(--serif);font-weight:400;font-size:36px;letter-spacing:-.01em;margin:6px 0 0}
.next-case h3 em{font-style:italic;color:var(--accent)}
.next-case a{display:flex;justify-content:space-between;align-items:center;gap:64px;width:100%;color:inherit;padding:24px 0;transition:transform .3s ease}
.next-case a:hover{transform:translateX(8px)}
.next-case .arr-big{font-family:var(--serif);font-size:48px;color:var(--accent);font-style:italic}

/* Case gallery */
.case-gallery{padding:0 var(--pad) 80px}
.gallery-head{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:18px;padding-top:16px}
.gallery-head .kicker{font-family:var(--mono);font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent)}
.gallery-head .count{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute)}
.gallery-strip{display:flex;gap:18px;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:18px;scrollbar-width:thin;scrollbar-color:var(--rule) transparent}
.gallery-strip .gimg{flex:0 0 560px;scroll-snap-align:start;margin:0;background:#fff;border:1px solid var(--rule-soft);border-radius:8px;overflow:hidden}
.gallery-strip .gimg img{display:block;width:100%;height:340px;object-fit:cover}
.gallery-strip .gimg figcaption{padding:12px 16px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);border-top:1px solid var(--rule-soft)}

/* Article detail */
.article-page{padding:64px 0 96px;max-width:780px;margin:0 auto}
.article-head{padding:32px 0 64px}
.article-head .meta{
  display:flex;align-items:center;gap:14px;font-family:var(--mono);font-size:11px;
  letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);margin-bottom:32px;
}
.article-head .meta .kind{color:var(--accent)}
.article-head h1{
  font-family:var(--serif);font-weight:400;font-size:clamp(40px,5.4vw,76px);
  line-height:1.04;letter-spacing:-.018em;margin:0 0 32px;
}
.article-head .deck{
  font-family:var(--serif);font-style:italic;font-size:22px;line-height:1.4;color:var(--ink-soft);margin:0;max-width:36ch;
}
body.is-zh .article-head .deck{font-style:normal;font-family:"Noto Serif SC",serif}
.article-body{font-size:18px;line-height:1.75;color:var(--ink-soft);font-family:var(--sans)}
body.is-zh .article-body{font-size:17px;line-height:1.85;font-family:"Noto Sans SC",var(--sans)}
.article-body p{margin:0 0 28px}
.article-body p:first-child::first-letter{
  font-family:var(--serif);font-size:64px;line-height:.85;float:left;padding:6px 14px 0 0;color:var(--accent);
}
body.is-zh .article-body p:first-child::first-letter{font-size:36px;padding:0 8px 0 0;float:none}
.article-foot{margin-top:80px;padding:32px 0;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute)}
.article-foot a{color:var(--ink)}
.article-foot a:hover{color:var(--accent)}

/* Insights index */
.insights-page{padding:64px 0 96px}
.insights-page .head{padding:32px 0 64px;border-bottom:1px solid var(--rule);margin-bottom:48px;display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:flex-end}
.insights-page .head h1{font-family:var(--serif);font-weight:400;font-size:clamp(48px,6vw,96px);letter-spacing:-.02em;line-height:1;margin:0}
.insights-page .head h1 em{font-style:italic;color:var(--accent)}
.insights-page .head .right{font-size:14px;color:var(--ink-soft);max-width:42ch}
.insights-list{display:grid;grid-template-columns:1fr;gap:0}
.insights-list a{
  display:grid;grid-template-columns:80px 110px 1fr 200px;
  gap:32px;padding:32px 8px;border-top:1px solid var(--rule);align-items:baseline;color:inherit;
  transition:padding .25s ease, background .25s ease;
}
.insights-list a:last-child{border-bottom:1px solid var(--rule)}
.insights-list a:hover{padding-left:24px;background:rgba(45,91,255,.03)}
.insights-list .li-num{font-family:var(--serif);font-style:italic;font-size:32px;color:var(--accent);line-height:1}
.insights-list .li-meta{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);line-height:1.6}
.insights-list .li-meta .kind{display:block;color:var(--ink)}
.insights-list .li-ttl{font-family:var(--serif);font-size:28px;line-height:1.18;letter-spacing:-.005em;color:var(--ink)}
.insights-list .li-date{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-mute);text-align:right}

.detail-foot{
  display:flex;justify-content:space-between;align-items:center;
  padding:32px var(--pad);border-top:1px solid var(--rule);
  font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--ink-mute);
  max-width:var(--maxw);margin:64px auto 0;
}

/* ─── Tablet (≤ 1024px) ─────────────────────────────────────────────── */
@media (max-width: 1024px){
  :root{ --pad: clamp(22px, 3.2vw, 48px); }
  .section-head{padding-top:72px;padding-bottom:36px;gap:28px}
  .section-head .right{max-width:240px;font-size:12px}
  .hero{min-height:640px}
  .hero-meta{padding-top:96px}
  .hero-tag h1{font-size:clamp(56px,8.4vw,120px)}
  .wwd-split{gap:48px}
  .case{flex-basis:76vw;max-width:560px}
  .case-head{gap:40px}
  .about-grid{gap:56px}
  .gallery-strip .gimg{flex-basis:460px}
  .gallery-strip .gimg img{height:300px}
}

/* ─── Mobile (≤ 760px) ──────────────────────────────────────────────── */
@media (max-width: 760px){
  :root{ --pad: 20px; }
  body{font-size:15px}
  .section-head{
    flex-direction:column;align-items:flex-start;
    gap:18px;padding-top:56px;padding-bottom:28px;
  }
  .section-head .right{text-align:left;max-width:none;font-size:13px}
  .section-head h2{font-size:clamp(32px,7.6vw,44px)}

  /* Nav */
  .nav{padding:16px var(--pad)}
  .nav .logo{font-size:19px}
  .nav .links{
    position:fixed;top:0;left:0;right:0;
    flex-direction:column;align-items:flex-start;gap:0;
    background:var(--bg);padding:74px 24px 32px;
    border-bottom:1px solid var(--rule);
    transform:translateY(-100%);transition:transform .35s cubic-bezier(.4,0,.2,1);
    z-index:39;
  }
  .nav .links.open{transform:translateY(0)}
  .nav .links a{
    font-family:var(--serif);font-size:30px;letter-spacing:-.01em;
    padding:14px 0;width:100%;border-bottom:1px solid var(--rule-soft);
    color:var(--ink);
  }
  .nav .links a::after{display:none}
  .nav-burger{
    display:flex !important;flex-direction:column;justify-content:center;gap:5px;
    width:30px;height:30px;background:transparent;border:0;cursor:pointer;
    position:relative;z-index:41;margin-left:14px;
  }
  .nav-burger span{display:block;width:22px;height:1.5px;background:var(--ink);transition:transform .25s ease, opacity .25s}
  .nav-burger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
  .nav-burger.open span:nth-child(2){opacity:0}
  .nav-burger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

  /* Hero */
  .hero{min-height:560px;height:auto;padding-top:84px;padding-bottom:48px}
  .hero-meta{
    flex-direction:column;gap:14px;padding-top:72px;
  }
  .hero-meta .ticker{text-align:left}
  .hero-tag{padding:28px 0 12px}
  .hero-tag .lead{font-size:11px;margin-bottom:20px;gap:10px}
  .hero-tag .lead::before{width:24px}
  .hero-tag h1{font-size:clamp(44px,12vw,72px);line-height:1.0;margin:0 0 28px}
  .hero-ctas{gap:10px;margin-top:24px;flex-direction:column;align-items:flex-start}
  .hero-ctas .btn{width:100%;justify-content:space-between}
  .hero-ctas .small{margin-left:0;margin-top:4px}
  body.is-zh .hero-tag h1{font-size:clamp(40px,10.4vw,64px);line-height:1.12}
  .hero-mask{
    background:radial-gradient(ellipse at 50% 50%, transparent 0%, rgba(244,241,234,.7) 50%, var(--bg) 90%);
  }

  /* What we do */
  .wwd-split{grid-template-columns:1fr;gap:40px}
  .wwd-col{padding:0}
  .wwd-col + .wwd-col{border-left:0;border-top:1px solid var(--rule);padding-top:40px}
  .wwd-col h3{font-size:clamp(28px,7vw,38px)}
  .wwd-bridge{font-size:18px;padding:48px 0 24px;text-align:left}

  /* Proof / cases on home */
  .proof-tabs .tabs-row{flex-wrap:wrap;gap:14px}
  .proof-tabs .tab{flex:1;min-width:140px}
  .proof-tabs .tabs-all{width:100%;text-align:left;padding:8px 0;margin-left:0}
  .case{flex-basis:86vw;max-width:none}
  .case .stages{grid-template-columns:1fr;gap:20px}
  .insight-card{flex-basis:86vw}
  .scroll-hint{gap:14px}

  /* About + contact */
  .about-grid{grid-template-columns:1fr;gap:40px}
  .about-left .stmt{font-size:clamp(24px,6vw,32px);max-width:none}
  .about-left .meta-grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .contact{padding:28px 22px}
  .footer{flex-direction:column;align-items:flex-start;gap:14px;text-align:left}

  /* Case detail */
  .case-head{grid-template-columns:1fr;gap:32px;padding-top:24px}
  .case-head h1{font-size:clamp(40px,10vw,60px)}
  .case-head .right .scope-grid{grid-template-columns:1fr 1fr;gap:18px}
  .case-viz-band{height:240px !important}
  .case-viz-band > div{width:90%}
  .case-intro{font-size:20px;margin:0 auto 56px;max-width:none;text-align:left}
  .case-body{grid-template-columns:1fr;gap:36px;margin-bottom:48px}
  .case-body section{display:block}
  .case-body .sec-num,.case-body .sec-lbl{display:inline-block;margin-right:14px}
  .pull-quote{padding:32px 0}
  .pull-quote q{font-size:22px}
  .deliverables{grid-template-columns:1fr;gap:18px}
  .deliverables ul{grid-template-columns:1fr}
  .next-case a{padding:24px 0}
  .next-case h3{font-size:28px}
  .next-case .arr-big{font-size:36px}

  /* Gallery */
  .case-gallery{padding:0 var(--pad) 56px}
  .gallery-strip{gap:12px}
  .gallery-strip .gimg{flex-basis:82vw}
  .gallery-strip .gimg img{height:240px}

  /* Article */
  .article-head{padding-top:24px}
  .article-head h1{font-size:clamp(32px,8.4vw,52px)}
  .article-head .meta{gap:8px;flex-wrap:wrap}
  .article-body p{font-size:17px;line-height:1.65}

  /* Insights index */
  .insights-page{padding:32px 0 64px}
  .insights-page .head{grid-template-columns:1fr;gap:18px;padding:16px 0 32px;margin-bottom:24px}
  .insights-page .head h1{font-size:clamp(40px,10vw,60px)}
  .insights-page .head .right{max-width:none;font-size:13px}
  .insights-list a{grid-template-columns:1fr;gap:8px;padding:20px 0}
  .insights-list .li-meta{font-size:10.5px}
  .insights-list .li-date{font-size:10.5px}
  .insights-list .li-ttl{font-size:22px}

  /* Detail page nav */
  .detail-nav{padding:14px var(--pad)}
  .detail-foot{flex-direction:column;gap:10px;align-items:flex-start;padding:24px var(--pad)}

  /* Disable paper grain on small screens for perf */
  body::before{opacity:.3}
}

/* ─── Very small (≤ 380px) tweaks ───────────────────────────────────── */
@media (max-width: 380px){
  .hero-tag h1{font-size:40px}
  .section-head h2{font-size:30px}
  body.is-zh .hero-tag h1{font-size:36px}
}

/* Touch devices: disable canvas particle interactivity hover state */
@media (hover: none){
  .btn:hover .arr{width:18px}
  .nav .links a::after{display:none}
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  html{scroll-behavior:auto}
}

/* fade-in util for sticky look */
.fade-up{opacity:0;transform:translateY(24px);transition:opacity .9s ease, transform .9s ease}
.fade-up.in{opacity:1;transform:none}