/* ============================================================
   china.alexandery.app — "印章 / Personal Seal"
   Paper + ink + cinnabar. Editorial, bilingual ZH/EN.
   ============================================================ */

:root{
  --paper:#F4EDDC;
  --paper-2:#EEE6D0;
  --ink:#211C15;
  --ink-soft:#574E3D;
  --ink-faint:#8C8069;
  --cinnabar:#C0392B;
  --cinnabar-deep:#96271b;
  --slate:#2E4A57;
  --rule:rgba(33,28,21,.16);
  --rule-soft:rgba(33,28,21,.09);
  --zh:'Noto Serif SC',serif;
  --en:'Spectral',Georgia,serif;
  --display:'Fraunces','Noto Serif SC',serif;
  --ease:cubic-bezier(.2,.7,.2,1);
  --maxw:1080px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--en);
  font-size:18px;
  line-height:1.6;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  position:relative;
  background-image:
    repeating-linear-gradient(180deg,transparent 0 39px,var(--rule-soft) 39px 40px),
    radial-gradient(120% 80% at 88% 8%,rgba(192,57,43,.06),transparent 55%),
    radial-gradient(110% 70% at 6% 92%,rgba(46,74,87,.05),transparent 55%);
}

/* language visibility */
body.lang-zh .en{display:none}
body.lang-en .zh{display:none}
body.lang-zh :is(.headline,.lede,.sec-title,.contact-title,.about-text,h3){font-family:var(--zh)}
body.lang-zh{font-family:var(--zh)}

/* paper grain */
.grain{
  position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.5;mix-blend-mode:multiply;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.13 0 0 0 0 0.11 0 0 0 0 0.08 0 0 0 0.05 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* vertical rail motif */
.vrail{
  position:fixed;top:0;bottom:0;right:26px;z-index:2;display:flex;align-items:center;pointer-events:none;
}
.vrail-text{
  writing-mode:vertical-rl;font-family:var(--zh);font-weight:500;font-size:13px;
  letter-spacing:.5em;color:var(--ink-faint);opacity:.6;
}
body.lang-en .vrail{opacity:.28}

/* ---------- top bar ---------- */
.topbar{
  position:relative;z-index:3;max-width:var(--maxw);margin:0 auto;
  padding:26px 30px 0;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.brand{display:flex;align-items:center;gap:13px;text-decoration:none;color:var(--ink)}
.seal{color:var(--cinnabar);display:inline-flex;filter:drop-shadow(0 1px 0 rgba(150,39,27,.25))}
.brand-name{font-family:var(--zh);font-weight:600;font-size:16px;letter-spacing:.02em}
body.lang-en .brand-name{font-family:var(--display)}
.lang-toggle{display:flex;align-items:center;gap:9px;font-family:var(--en);font-size:14px}
.lang-toggle button{
  background:none;border:none;cursor:pointer;color:var(--ink-faint);font:inherit;
  padding:2px 2px;letter-spacing:.04em;transition:color .2s var(--ease);
}
.lang-toggle button.is-active{color:var(--cinnabar);font-weight:600}
.lang-toggle button:hover{color:var(--ink)}
.lang-toggle .sep{color:var(--rule)}

/* ---------- layout ---------- */
.wrap{position:relative;z-index:3;max-width:var(--maxw);margin:0 auto;padding:0 30px 90px}
section{position:relative}

/* ---------- hero ---------- */
.hero{padding:70px 0 64px;position:relative}
.seal-watermark{
  position:absolute;top:-4px;right:-28px;color:var(--cinnabar);opacity:.1;pointer-events:none;
  transform:rotate(-6deg);z-index:0;
}
.eyebrow{
  font-family:var(--en);font-size:14px;letter-spacing:.22em;text-transform:uppercase;
  display:flex;align-items:center;gap:12px;color:var(--ink-soft);margin-bottom:26px;font-weight:500;
}
.eyebrow .cn{color:var(--cinnabar)}
.eyebrow .ru{color:var(--slate)}
.eyebrow .arw{color:var(--ink-faint)}
body.lang-zh .eyebrow{font-family:var(--zh);letter-spacing:.16em}

.headline{
  font-family:var(--display);font-weight:500;font-size:clamp(2.5rem,6.4vw,5rem);
  line-height:1.06;letter-spacing:-.02em;color:var(--ink);max-width:16ch;margin-bottom:30px;
}
.headline em{font-style:italic;color:var(--cinnabar);font-weight:500}
body.lang-zh .headline{font-weight:600;line-height:1.22;letter-spacing:0;max-width:22ch}
body.lang-zh .headline em{font-style:normal;border-bottom:3px solid var(--cinnabar);padding-bottom:2px}

.lede{
  font-size:clamp(1.05rem,2vw,1.3rem);color:var(--ink-soft);max-width:56ch;line-height:1.68;margin-bottom:40px;
}
.lede strong{color:var(--ink);font-weight:600}
body.lang-zh .lede strong{color:var(--cinnabar)}

/* buttons */
.cta-row{display:flex;flex-wrap:wrap;gap:14px}
.btn{
  display:inline-flex;align-items:center;gap:11px;text-decoration:none;font-family:var(--en);
  font-size:16px;font-weight:600;padding:15px 26px;border-radius:2px;transition:all .22s var(--ease);
  letter-spacing:.01em;
}
body.lang-zh .btn{font-family:var(--zh)}
.btn-primary{background:var(--cinnabar);color:var(--paper);box-shadow:0 1px 0 var(--cinnabar-deep),0 14px 26px -14px rgba(150,39,27,.7)}
.btn-primary:hover{background:var(--cinnabar-deep);transform:translateY(-2px);box-shadow:0 1px 0 var(--cinnabar-deep),0 20px 34px -14px rgba(150,39,27,.8)}
.btn-arrow{transition:transform .22s var(--ease)}
.btn-primary:hover .btn-arrow{transform:translateX(5px)}
.btn-ghost{background:none;color:var(--ink);border:1px solid var(--rule)}
.btn-ghost:hover{border-color:var(--ink);background:rgba(33,28,21,.04)}

/* ---------- section titles ---------- */
.sec-title{
  font-family:var(--display);font-weight:500;font-size:clamp(1.5rem,3vw,2.2rem);letter-spacing:-.01em;
  color:var(--ink);margin-bottom:34px;padding-top:14px;border-top:1px solid var(--rule);
  display:inline-block;
}
body.lang-zh .sec-title{font-weight:600}
.sec-title::before{
  content:'';display:block;width:36px;height:3px;background:var(--cinnabar);margin-bottom:20px;
}

/* ---------- barriers ---------- */
.barriers{padding:36px 0}
.barrier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2px;background:var(--rule);border:1px solid var(--rule)}
.barrier{background:var(--paper);padding:28px 26px}
.myth{font-family:var(--display);font-style:italic;font-size:1.35rem;color:var(--ink-faint);margin-bottom:14px}
body.lang-zh .myth{font-family:var(--zh);font-style:normal;color:var(--ink-faint)}
.flip{font-size:1.02rem;color:var(--ink);line-height:1.62}
body.lang-zh .flip{font-family:var(--zh)}

/* ---------- offer / pillars ---------- */
.offer{padding:40px 0}
.pillars{list-style:none}
.pillar{
  display:grid;grid-template-columns:88px 1fr;gap:28px;align-items:start;
  padding:30px 0;border-top:1px solid var(--rule);
}
.pillar:last-child{border-bottom:1px solid var(--rule)}
.num{
  font-family:var(--display);font-size:2.4rem;font-weight:400;color:var(--cinnabar);line-height:1;
  font-variant-numeric:oldstyle-nums;
}
.pillar-body h3{font-family:var(--display);font-weight:600;font-size:1.4rem;margin-bottom:10px;letter-spacing:-.01em}
body.lang-zh .pillar-body h3{font-family:var(--zh)}
.pillar-body p{color:var(--ink-soft);font-size:1.06rem;line-height:1.66;max-width:60ch}
body.lang-zh .pillar-body p{font-family:var(--zh)}

/* ---------- about ---------- */
.about{padding:52px 0}
.about-inner{
  background:var(--ink);color:var(--paper);border-radius:3px;padding:clamp(32px,5vw,58px);
  position:relative;overflow:hidden;
}
.about-inner::after{
  content:'桥';position:absolute;right:-20px;bottom:-70px;font-family:var(--zh);font-weight:700;
  font-size:280px;color:rgba(192,57,43,.14);line-height:1;pointer-events:none;
}
.about-lead{font-family:var(--display);font-style:italic;font-size:1.5rem;color:var(--cinnabar);margin-bottom:18px;position:relative}
body.lang-zh .about-lead{font-family:var(--zh);font-style:normal}
.about-text{font-size:clamp(1.1rem,2.2vw,1.5rem);line-height:1.66;color:#EFE7D4;max-width:40ch;position:relative;font-family:var(--display);font-weight:400}
body.lang-zh .about-text{font-family:var(--zh)}

/* ---------- contact ---------- */
.contact{padding:40px 0 10px}
.contact-title{
  font-family:var(--display);font-weight:500;font-size:clamp(1.6rem,3.4vw,2.6rem);
  line-height:1.22;letter-spacing:-.01em;margin-bottom:38px;max-width:24ch;
}
body.lang-zh .contact-title{font-weight:600;line-height:1.4}
.contact-methods{display:flex;flex-wrap:wrap;gap:2px;background:var(--rule);border:1px solid var(--rule);margin-bottom:24px}
.method{
  flex:1 1 200px;background:var(--paper);padding:22px 24px;text-decoration:none;color:var(--ink);
  display:flex;flex-direction:column;gap:6px;transition:background .2s var(--ease);
}
a.method:hover{background:var(--paper-2)}
.method-k{font-family:var(--en);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--ink-faint)}
.method-v{font-family:var(--display);font-size:1.15rem;color:var(--ink)}
a.method:hover .method-v{color:var(--cinnabar)}
.method-static{opacity:.62}
body.lang-zh .method-static .method-v{font-family:var(--zh)}
.reply-note{color:var(--ink-soft);font-size:1rem}
body.lang-zh .reply-note{font-family:var(--zh)}

/* ---------- footer ---------- */
.foot{
  margin-top:64px;padding-top:26px;border-top:1px solid var(--rule);
  display:flex;align-items:center;gap:14px;color:var(--ink-faint);font-size:14px;
}
.foot-seal{color:var(--cinnabar);opacity:.75;display:inline-flex}
.foot-txt{font-family:var(--zh)}
body.lang-en .foot-txt{font-family:var(--en)}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:calc(var(--d,0)*90ms)}
.reveal.in{opacity:1;transform:none}
.seal svg,.foot-seal svg{animation:stampin .8s var(--ease) both}
@keyframes stampin{0%{opacity:0;transform:scale(1.4) rotate(-12deg)}60%{opacity:1}100%{opacity:1;transform:none}}

/* ---------- responsive ---------- */
@media(max-width:820px){
  .barrier-grid{grid-template-columns:1fr}
  .vrail{display:none}
  .seal-watermark{width:220px;opacity:.08;right:-40px}
  .seal-watermark svg{width:220px;height:220px}
}
@media(max-width:560px){
  body{font-size:17px}
  .wrap{padding:0 20px 70px}
  .topbar{padding:20px 20px 0}
  .hero{padding:48px 0 44px}
  .pillar{grid-template-columns:1fr;gap:10px}
  .num{font-size:1.8rem}
  .contact-methods{flex-direction:column}
  .btn{width:100%;justify-content:center}
}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .seal svg,.foot-seal svg{animation:none}
  html{scroll-behavior:auto}
}