/* ============================================================
   kinwit site-v4 · shared styles
   暖纸编辑部 + 唯一深墨章节 · 依据 site-v4-设计方案.md §4
   ============================================================ */

:root{
  /* paper & ink */
  --paper:#F3EFE6; --paper-hi:#F7F4EC; --paper-lo:#EBE5D7;
  --ink:#211F1B; --ink-70:#46423B; --ink-45:#7C766B;
  /* accents */
  --coral:#BB5A3A; --coral-d:#A04C2F; --gold:#D9A441;
  /* dark chapter */
  --cream:#F1EBDD; --cream-70:rgba(241,235,221,.72); --cream-45:rgba(241,235,221,.45);
  --line-inv:rgba(241,235,221,.14); --coral-hot:#D96A45;
  /* lines */
  --line:rgba(33,31,27,.13); --line-soft:rgba(33,31,27,.07);
  /* type */
  --display:"Playfair Display",Georgia,serif;
  --sans:"Hanken Grotesk",-apple-system,BlinkMacSystemFont,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  /* misc */
  --ease:cubic-bezier(.2,.7,.2,1);
  --maxw:1440px; --pad:clamp(24px,4.4vw,56px);
}
html[lang="zh"]{
  --display:"Noto Serif SC",Georgia,serif;
  --sans:"Noto Sans SC",-apple-system,sans-serif;
}

/* base ------------------------------------------------------- */
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.6;overflow-x:hidden}
::selection{background:var(--coral);color:var(--paper-hi)}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;background:none;border:none;cursor:pointer;color:inherit}
body::before{content:"";position:fixed;inset:0;z-index:80;pointer-events:none;opacity:.05;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.7' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
.wrap{max-width:var(--maxw);margin:0 auto;padding-left:var(--pad);padding-right:var(--pad)}
.spark-sym{position:absolute;width:0;height:0;overflow:hidden}

/* type roles -------------------------------------------------- */
.display{font-family:var(--display);font-weight:500;font-size:clamp(44px,4.9vw,72px);line-height:1.06;letter-spacing:-.015em;text-wrap:balance}
html[lang="zh"] .display{font-weight:600;font-size:clamp(32px,3.6vw,54px);letter-spacing:.02em;line-height:1.5}
.display em{font-style:normal;color:var(--coral)}
.h2{font-family:var(--display);font-weight:500;font-size:clamp(32px,3.4vw,50px);line-height:1.12;letter-spacing:-.01em;text-wrap:balance}
html[lang="zh"] .h2{font-weight:700;letter-spacing:.01em;line-height:1.3}
.h2 em{font-style:italic;color:var(--coral)}
html[lang="zh"] .h2 em{font-style:normal}
.h3{font-family:var(--display);font-weight:500;font-size:clamp(21px,1.8vw,25px);line-height:1.3}
html[lang="zh"] .h3{font-weight:600;line-height:1.44}
.lead{font-size:clamp(16px,1.2vw,17.5px);line-height:1.65;color:var(--ink-70)}

.eyebrow{font-family:var(--mono);font-size:12px;font-weight:500;letter-spacing:.22em;text-transform:uppercase;color:var(--coral);display:inline-flex;align-items:center;gap:10px}
html[lang="zh"] .eyebrow{letter-spacing:.3em;font-size:12.5px}
.eyebrow .s{width:13px;height:13px;flex:none;fill:currentColor}
.mono{font-family:var(--mono)}

/* nav ---------------------------------------------------------- */
header{position:sticky;top:0;z-index:90;background:rgba(243,239,230,.86);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}
nav{position:relative;max-width:var(--maxw);margin:0 auto;padding:15px var(--pad);display:flex;align-items:center;gap:clamp(20px,3vw,44px)}
.brand{display:inline-flex;align-items:center;flex:none}
.brand img{height:34px}
.nav-links{display:flex;align-items:center;gap:clamp(18px,2.4vw,34px);margin-left:auto}
.nav-links a{font-size:13px;font-weight:500;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-70);transition:color .25s;white-space:nowrap}
html[lang="zh"] .nav-links a{letter-spacing:.08em;text-transform:none;font-size:14.5px}
.nav-links a:hover,.nav-links a.on{color:var(--coral)}
.nav-right{display:flex;align-items:center;gap:12px;flex:none}
.nav-cta{background:var(--coral);color:var(--paper-hi);font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;padding:10px 19px;border-radius:5px;transition:background .25s;white-space:nowrap}
html[lang="zh"] .nav-cta{letter-spacing:.06em;text-transform:none;font-size:13px}
.nav-cta:hover{background:var(--coral-d)}
.lang-btn{font-family:var(--mono);font-size:12px;font-weight:500;border:1px solid var(--line);border-radius:5px;padding:8px 12px;transition:border-color .2s}
.lang-btn:hover{border-color:var(--ink)}
.nav-toggle{display:none;width:38px;height:34px;border:1px solid var(--line);border-radius:7px;flex-direction:column;justify-content:center;align-items:center;gap:4px}
.nav-toggle span{display:block;width:15px;height:1.5px;background:var(--ink)}
@media(max-width:920px){
  .nav-links{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:var(--paper);border-bottom:1px solid var(--line);padding:6px var(--pad) 14px;display:none}
  nav.open .nav-links{display:flex}
  .nav-links a{padding:13px 2px;font-size:15px;border-bottom:1px solid var(--line-soft)}
  .nav-toggle{display:flex}
  .nav-cta{padding:8px 13px;font-size:11.5px}
}

/* sections ----------------------------------------------------- */
section{padding:clamp(76px,11vh,140px) 0;border-top:1px solid var(--line-soft);scroll-margin-top:70px}
section.flush{border-top:none}
.sec-head{margin-bottom:clamp(36px,4.6vw,64px)}
.sec-head .h2{margin-top:16px}
.sec-head .lead{margin-top:16px;max-width:56ch}

/* reveal motion ------------------------------------------------ */
.reveal{opacity:0;transform:translateY(36px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.08s}.d2{transition-delay:.16s}.d3{transition-delay:.24s}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation-duration:.01ms!important;animation-iteration-count:1!important}
  html{scroll-behavior:auto}
}

/* hero (homepage) ---------------------------------------------- */
.hero{position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:clamp(32px,5vw,72px);align-items:center;padding-top:clamp(44px,6.5vh,84px);padding-bottom:clamp(52px,7.5vh,96px)}
.hero .eyebrow{margin-bottom:24px}
.hero .sub{margin-top:24px;font-size:clamp(15.5px,1.15vw,17px);line-height:1.65;color:var(--ink-70);max-width:46ch}

.hero-actions{margin-top:36px;display:flex;gap:16px;flex-wrap:wrap;max-width:520px}
.hero-actions .cta,.hero-actions .cta2{flex:1 1 200px;max-width:252px;justify-content:center;white-space:nowrap}
.hero-art{position:relative}
.hero-art img{position:relative;z-index:1;width:100%;max-height:min(74vh,780px);object-fit:contain}
.hero-art .hstar{position:absolute;top:5%;right:9%;width:26px;height:26px;color:var(--coral);z-index:2;animation:starGlow 5.5s ease-in-out infinite}
.hero-art .hstar svg{width:100%;height:100%;fill:currentColor}
@keyframes starGlow{0%,100%{transform:scale(1);filter:drop-shadow(0 0 6px rgba(187,90,58,.3))}50%{transform:scale(1.14);filter:drop-shadow(0 0 15px rgba(187,90,58,.55))}}

/* CTA buttons --------------------------------------------------- */
.cta{display:inline-flex;align-items:center;gap:12px;background:var(--coral);color:var(--paper-hi);border:1px solid var(--coral);
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;padding:15px 28px;border-radius:5px;
  transition:background .25s,transform .25s var(--ease)}
html[lang="zh"] .cta{letter-spacing:.06em;text-transform:none}
.cta:hover{background:var(--coral-d);transform:translateY(-1px)}
.cta .ar{transition:transform .3s var(--ease)}
.cta:hover .ar{transform:translateX(4px)}
.cta2{display:inline-flex;align-items:center;gap:12px;background:transparent;color:var(--ink);border:1px solid var(--line);
  font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;padding:15px 28px;border-radius:5px;
  transition:color .25s,border-color .25s,transform .25s var(--ease)}
html[lang="zh"] .cta2{letter-spacing:.06em;text-transform:none}
.cta2:hover{color:var(--coral);border-color:var(--coral);transform:translateY(-1px)}

/* data strip (mono) --------------------------------------------- */
.strip{margin-top:48px;padding-top:24px;border-top:1px solid var(--line);display:grid;grid-template-columns:repeat(4,auto);justify-content:start;gap:clamp(24px,3.5vw,56px)}
.strip>div{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--ink-45)}
.strip b{display:block;font-size:22px;font-weight:500;color:var(--ink);letter-spacing:0;margin-bottom:2px}
.strip b i{font-style:normal;color:var(--coral)}
@media(max-width:640px){.strip{grid-template-columns:1fr 1fr;gap:20px 24px}}

/* four-line index (homepage) ------------------------------------ */
.idx-row{display:grid;grid-template-columns:64px 1fr auto;gap:clamp(16px,2.4vw,28px);align-items:baseline;padding:clamp(22px,2.6vw,30px) 0;border-top:1px solid var(--line);transition:background .25s;position:relative}
.idx-row:last-of-type{border-bottom:1px solid var(--line)}
.idx-row:hover{background:var(--paper-hi)}
.idx-row .no{font-family:var(--mono);font-size:13px;color:var(--ink-45)}
.idx-row .t{font-family:var(--display);font-weight:500;font-size:clamp(22px,2.3vw,31px);letter-spacing:-.005em}
html[lang="zh"] .idx-row .t{font-weight:700;letter-spacing:.01em}
.idx-row .t small{display:block;font-family:var(--sans);font-size:14.5px;font-weight:400;color:var(--ink-45);letter-spacing:0;margin-top:7px;line-height:1.6;max-width:62ch}

.idx-row .meta{font-family:var(--mono);font-size:12px;letter-spacing:.12em;color:var(--coral);text-transform:uppercase;white-space:nowrap;transition:transform .3s var(--ease)}
.idx-row:hover .meta{transform:translateX(4px)}
@media(max-width:640px){.idx-row{grid-template-columns:44px 1fr}.idx-row .meta{grid-column:2;margin-top:8px}}

/* dark chapter --------------------------------------------------- */
.dark{background:var(--ink);color:var(--cream);position:relative;overflow:hidden;border-top:none}

.dark .wrap{position:relative}
.dark .eyebrow{color:var(--coral-hot)}
.dark .h2{color:var(--cream)}
.dark .h2 em{color:var(--coral-hot)}
.dark .lead{color:var(--cream-70)}
.pipe{margin-top:52px;display:flex;align-items:center;flex-wrap:wrap;row-gap:14px}
.pipe .step{font-family:var(--mono);font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--cream-70);border:1px solid var(--line-inv);padding:11px 19px;border-radius:99px;white-space:nowrap}
.pipe .step.hot{color:var(--ink);background:var(--coral-hot);border-color:var(--coral-hot);font-weight:500}
.pipe .arr{color:var(--coral-hot);padding:0 12px;font-family:var(--mono)}

/* dark chapter editorial data ----------------------------------- */
.data-line{margin-top:clamp(44px,6vh,72px);display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(24px,3vw,48px)}
.data-line>div{border-top:1px solid var(--line-inv);padding-top:20px}
.data-line b{display:block;font-family:var(--display);font-weight:500;font-size:clamp(30px,2.8vw,46px);letter-spacing:-.01em;color:var(--cream);line-height:1.1}
.data-line b i{font-style:italic;color:var(--coral-hot)}
.data-line span{display:block;margin-top:8px;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--cream-45)}
@media(max-width:860px){.data-line{grid-template-columns:1fr 1fr}}
.pipe-line{margin-top:clamp(36px,5vh,56px);font-family:var(--mono);font-size:12.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--cream-45);line-height:2.2}
.pipe-line em{font-style:normal;color:var(--coral-hot)}
.pipe-line .sep{padding:0 10px;color:var(--cream-45)}

/* float card ------------------------------------------------------ */
.float{background:var(--paper-hi);border:1px solid var(--line-soft);border-radius:14px;padding:clamp(18px,2.2vw,32px);
  box-shadow:0 24px 60px -28px rgba(33,31,27,.28),0 6px 18px -8px rgba(33,31,27,.12)}
.float img{border-radius:8px;width:100%}
.float .cap{margin-top:14px;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--ink-45);display:flex;justify-content:space-between;gap:12px}

/* product alternating rows (subpages) ----------------------------- */
.prod{display:grid;grid-template-columns:.94fr 1.06fr;gap:clamp(32px,5vw,80px);align-items:center;padding:clamp(56px,8vh,104px) 0;border-top:1px solid var(--line-soft)}
.prod:first-of-type{border-top:none}
.prod.rev .prod-art{order:-1}
.prod .kicker{font-family:var(--mono);font-size:12px;letter-spacing:.22em;text-transform:uppercase;color:var(--coral);margin-bottom:16px;display:inline-flex;align-items:center;gap:10px}
.prod .kicker .s{width:12px;height:12px;fill:currentColor}
.prod .d{margin-top:18px;font-size:16px;color:var(--ink-70);max-width:44ch;line-height:1.65}

.feat{margin-top:22px;list-style:none}
.feat li{padding:12px 0;border-bottom:1px solid var(--line-soft);font-size:14.5px;color:var(--ink-70);display:flex;gap:12px;align-items:baseline}
.feat li::before{content:"✦";color:var(--coral);font-size:10px;flex:none}
.prod .entry{margin-top:26px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.footnote{margin-top:18px;font-size:12.5px;color:var(--ink-45);line-height:1.6;max-width:44ch}

/* badge / pill ------------------------------------------------------ */
.pill{display:inline-flex;align-items:center;gap:8px;font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--coral);border:1px solid var(--line);padding:8px 16px;border-radius:99px;transition:border-color .2s,color .2s;cursor:pointer}
.pill:hover{border-color:var(--coral)}
.pill.static{cursor:default}
.pill.static:hover{border-color:var(--line)}

/* subpage hero ------------------------------------------------------ */
.sub-hero{padding-top:clamp(52px,8vh,96px);padding-bottom:clamp(44px,6vh,80px)}
.sub-hero .eyebrow{margin-bottom:22px}
.sub-hero .display{max-width:22ch}
.sub-hero .lead{margin-top:24px;max-width:56ch}
.sub-hero .hero-actions{margin-top:34px}

/* principles 3-col --------------------------------------------------- */
.pri-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(24px,3vw,48px)}
.pri .no{font-family:var(--mono);font-size:12px;color:var(--coral);letter-spacing:.16em}
.pri .h3{margin-top:12px}
.pri p{margin-top:12px;font-size:15px;color:var(--ink-70);line-height:1.7}

@media(max-width:780px){.pri-grid{grid-template-columns:1fr}}

/* case rows ----------------------------------------------------------- */
.case-row{display:grid;grid-template-columns:1fr auto;gap:clamp(16px,2.4vw,32px);align-items:baseline;padding:clamp(20px,2.4vw,28px) 0;border-top:1px solid var(--line);transition:background .25s}
.case-row:last-of-type{border-bottom:1px solid var(--line)}
.case-row:hover{background:var(--paper-hi)}
.case-row .t{font-family:var(--display);font-weight:500;font-size:clamp(19px,1.9vw,26px);line-height:1.3;max-width:34ch}
html[lang="zh"] .case-row .t{font-weight:600}
.case-row .t small{display:block;font-family:var(--sans);font-size:13.5px;font-weight:400;color:var(--ink-45);margin-top:6px}
.case-row .tag{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-45);white-space:nowrap}

/* careers rows ---------------------------------------------------------- */
.role{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 2px;border-top:1px solid var(--line);transition:background .25s,padding-left .3s var(--ease)}
.role:last-of-type{border-bottom:1px solid var(--line)}
.role:hover{background:var(--paper-hi);padding-left:10px}
.role .rt{font-size:16.5px;font-weight:500}
.role .rd{font-size:13.5px;color:var(--ink-45)}
.role .ar{color:var(--coral);transition:transform .3s var(--ease)}
.role:hover .ar{transform:translateX(4px)}
@media(max-width:560px){.role{flex-wrap:wrap}.role .rd{width:100%}}

/* CTA band (subpage bottom) ---------------------------------------------- */
.cta-band{background:var(--paper-lo);border-top:1px solid var(--line-soft)}
.cta-band .band-in{display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap}
.cta-band .h2{max-width:24ch}

/* footer ------------------------------------------------------------------ */
footer{background:var(--paper-lo);border-top:1px solid var(--line);padding:clamp(48px,7vh,80px) 0 34px}
.foot-grid{display:grid;grid-template-columns:1.4fr repeat(3,minmax(120px,.8fr));gap:clamp(28px,4vw,64px)}
.foot-brand img{height:34px}
.foot-brand p{margin-top:16px;font-size:14px;color:var(--ink-45);max-width:30ch;line-height:1.7}
.foot-col h4{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-45);margin-bottom:16px}
.foot-col a{display:block;font-size:14.5px;color:var(--ink-70);padding:5px 0;transition:color .2s}
.foot-col a:hover{color:var(--coral)}
.foot-meta{margin-top:clamp(36px,5vh,56px);padding-top:22px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink-45)}
.foot-icp{margin-top:12px;font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;color:var(--ink-45)}
.foot-icp a{color:inherit;transition:color .2s}
.foot-icp a:hover{color:var(--coral)}
@media(max-width:780px){.foot-grid{grid-template-columns:1fr 1fr}}

/* QR modal ------------------------------------------------------------------ */
.qr-mask{position:fixed;inset:0;z-index:200;background:rgba(33,31,27,.5);backdrop-filter:blur(4px);display:none;align-items:center;justify-content:center;padding:24px}
.qr-mask.open{display:flex}
.qr-card{background:var(--paper-hi);border-radius:16px;padding:36px 40px;max-width:340px;width:100%;text-align:center;position:relative;box-shadow:0 40px 90px -30px rgba(33,31,27,.5)}
.qr-card img{width:200px;height:200px;margin:20px auto 0;border-radius:10px;background:#fff}
.qr-card .qt{font-family:var(--display);font-weight:500;font-size:21px}
html[lang="zh"] .qr-card .qt{font-weight:600}
.qr-card .qd{margin-top:6px;font-family:var(--mono);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-45)}
.qr-close{position:absolute;top:12px;right:14px;font-size:22px;line-height:1;color:var(--ink-45);padding:6px}
.qr-close:hover{color:var(--ink)}

/* two-col generic (training tracks etc.) -------------------------------------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,64px)}
@media(max-width:860px){.two-col{grid-template-columns:1fr}}
.step-list{list-style:none;margin-top:22px}
.step-list li{display:grid;grid-template-columns:34px 1fr;gap:14px;padding:16px 0;border-bottom:1px solid var(--line-soft)}
.step-list .sn{font-family:var(--mono);font-size:13px;color:var(--coral)}
.step-list b{display:block;font-size:15.5px;font-weight:600}
.step-list p{font-size:14px;color:var(--ink-70);margin-top:4px;line-height:1.65}


/* highlight block (training promise) ------------------------------------------- */
.promise{margin-top:clamp(40px,5vh,64px);background:var(--paper-hi);border:1px solid var(--line-soft);border-left:3px solid var(--coral);border-radius:0 12px 12px 0;padding:clamp(24px,3vw,40px)}
.promise .h3{color:var(--ink)}
.promise p{margin-top:10px;font-size:15px;color:var(--ink-70);max-width:70ch}

/* game cards ---------------------------------------------------------------------- */
.gcards{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,2.6vw,32px)}
@media(max-width:780px){.gcards{grid-template-columns:1fr}}
.gcard{background:var(--paper-hi);border:1px solid var(--line-soft);border-radius:14px;overflow:hidden;box-shadow:0 24px 60px -30px rgba(33,31,27,.25);transition:transform .35s var(--ease)}
.gcard:hover{transform:translateY(-4px)}
.gcard img{aspect-ratio:16/9;object-fit:contain;width:100%;background:var(--paper)}
.gcard .gi{padding:20px 24px;display:flex;justify-content:space-between;align-items:center;gap:14px;flex-wrap:wrap}
.gcard .gt{font-family:var(--display);font-weight:500;font-size:20px}
html[lang="zh"] .gcard .gt{font-weight:600}
.gcard .gd{font-size:13px;color:var(--ink-45);width:100%}

/* responsive general ---------------------------------------------------------------- */
@media(max-width:860px){
  .hero-grid{grid-template-columns:1fr}
  .hero-art{max-width:440px;margin:16px auto 0}
  .prod{grid-template-columns:1fr}
  .prod.rev .prod-art{order:0}
  .foot-grid{grid-template-columns:1fr 1fr}
}

/* zh line-breaking: keep-all only where lines are long enough ------------- */
@media(min-width:641px){
  html[lang="zh"] .display,html[lang="zh"] .h2,html[lang="zh"] .lead,
  html[lang="zh"] .hero .sub,html[lang="zh"] .idx-row .t small,
  html[lang="zh"] .prod .d,html[lang="zh"] .pri p,html[lang="zh"] .step-list p{word-break:keep-all}
}

/* contact page ------------------------------------------------------ */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,64px);align-items:start}
@media(max-width:860px){.contact-grid{grid-template-columns:1fr}}
.contact-main .h2{max-width:20ch}
.contact-mail{display:inline-flex;align-items:center;gap:14px;margin-top:30px;font-family:var(--display);font-weight:500;font-size:clamp(22px,2.2vw,30px);color:var(--ink);border-bottom:2px solid var(--coral);padding-bottom:6px;transition:color .25s}
.contact-mail:hover{color:var(--coral)}
.contact-note{margin-top:26px;font-size:14.5px;color:var(--ink-45);line-height:1.75;max-width:44ch}
.contact-aside{border-left:1px solid var(--line);padding-left:clamp(24px,3vw,44px);display:flex;flex-direction:column;gap:28px}
@media(max-width:860px){.contact-aside{border-left:none;padding-left:0;border-top:1px solid var(--line);padding-top:28px}}
.contact-aside h4{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-45);margin-bottom:10px}
.contact-aside p{font-size:14.5px;color:var(--ink-70);line-height:1.75}

/* capability stack cards (solutions) --------------------------------- */
.stack-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(16px,1.8vw,24px)}
@media(max-width:1060px){.stack-grid{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.stack-grid{grid-template-columns:1fr}}
.stack-card{background:var(--paper-hi);border:1px solid var(--line-soft);border-radius:12px;padding:24px 24px 26px;
  box-shadow:0 14px 34px -20px rgba(33,31,27,.18)}
.stack-tag{display:inline-block;font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--coral);margin-bottom:14px}
.stack-card .h3{font-size:19px}
.stack-card p{margin-top:10px;font-size:14px;color:var(--ink-70);line-height:1.7}

/* contact wechat qr ---------------------------------------------------- */
.contact-wechat{margin-top:30px;display:inline-flex;flex-direction:column;gap:10px}
.contact-wechat img{width:168px;height:168px;border:1px solid var(--line);border-radius:12px;background:#fff;padding:10px}
.wx-cap{font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-45);text-align:center}

/* case line (solutions) ------------------------------------------------ */
.case-line{margin-top:26px;border-left:2px solid var(--coral);background:var(--paper-hi);border-radius:0 8px 8px 0;padding:13px 18px;font-size:14px;color:var(--ink-70);line-height:1.7;max-width:52ch}
.case-tag{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;color:var(--coral);margin-right:10px}