:root{
  --ink-950:#07080A;
  --ink-850:#101216;
  --ink-700:#1E2128;
  --gold-500:#C9A253;
  --gold-300:#EAD79A;
  --paper-100:#F2EADA;
  --paper-300:#D9CDB6;
  --cyan-400:#34E2D8;
  --magenta-500:#FF3F80;
  --jade-700:#10544C;
  --gray-400:#8B9099;
  --amber-500:#E8A23C;
  --font-display:"Noto Serif SC","Source Han Serif SC",Songti SC,serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --rail-w:76px;
  --rail-open:264px;
  --content-max:1180px;
  --shadow-hard:6px 6px 0 rgba(0,0,0,.55);
  --shadow-gold:6px 6px 0 rgba(201,162,83,.18);
  --focus:3px solid var(--cyan-400);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--ink-950);
  color:var(--paper-100);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  font-weight:400;
  letter-spacing:.01em;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  pointer-events:none;
  z-index:0;
  background-image:
    linear-gradient(rgba(201,162,83,.05) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,162,83,.05) 1px,transparent 1px);
  background-size:64px 64px;
}
h1,h2,h3,h4,p,ul,ol,dl,dd,figure{margin:0}
ul,ol{padding:0;list-style:none}
a{color:var(--cyan-400);text-decoration:none}
a:hover{color:var(--gold-300)}
img,svg{max-width:100%;display:block}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3{font-family:var(--font-display);font-weight:800;letter-spacing:-.01em;line-height:1.15;color:var(--gold-300)}
h1{font-size:clamp(40px,7vw,96px)}
h2{font-size:clamp(26px,3.4vw,44px)}
h3{font-size:20px;font-weight:700}
p{max-width:68ch}
:focus-visible{outline:var(--focus);outline-offset:3px}

/* ---------- skip link ---------- */
.skip-link{
  position:absolute;
  left:12px;
  top:-64px;
  z-index:120;
  padding:10px 18px;
  background:var(--gold-500);
  color:var(--ink-950);
  font-weight:700;
  border:1px solid var(--gold-300);
  transition:top .2s ease;
}
.skip-link:focus{top:12px;color:var(--ink-950)}

/* ---------- shell ---------- */
.site-shell{padding-left:0;position:relative;z-index:1}

/* ---------- header / frame nav ---------- */
.site-header{position:relative;z-index:90}
.frame-nav{
  position:fixed;
  left:0;top:0;bottom:0;
  width:var(--rail-w);
  background:linear-gradient(180deg,var(--ink-850),var(--ink-950) 70%);
  border-right:1px solid var(--ink-700);
  display:flex;
  flex-direction:column;
  gap:20px;
  padding:24px 0 20px;
  overflow:hidden;
  transition:width .38s cubic-bezier(.2,.8,.2,1);
}
.frame-nav::after{
  content:"";
  position:absolute;
  right:0;top:0;bottom:0;
  width:1px;
  background:linear-gradient(180deg,transparent,var(--gold-500),transparent);
}
.frame-nav__mark{
  display:block;
  width:2px;height:14px;
  background:var(--gold-500);
  box-shadow:6px 0 0 var(--magenta-500);
  margin-bottom:8px;
}
.frame-nav__brand{padding:0 20px 16px;border-bottom:1px solid var(--ink-700)}
.frame-nav__brandname{display:block;color:var(--paper-100)}
.frame-nav__brandcn{
  display:block;
  font-family:var(--font-display);
  font-weight:800;
  font-size:17px;
  white-space:nowrap;
  color:var(--gold-300);
}
.frame-nav__branden{
  display:block;
  font-family:var(--font-mono);
  font-size:10px;
  letter-spacing:.16em;
  color:var(--gray-400);
  white-space:nowrap;
}
.frame-nav__line{
  font-size:11px;
  line-height:1.6;
  color:var(--gray-400);
  padding:0 20px;
  white-space:nowrap;
  max-width:none;
}
.frame-nav__list{display:flex;flex-direction:column;gap:2px;margin-top:4px}
.frame-nav__link{
  position:relative;
  display:flex;
  align-items:baseline;
  gap:12px;
  padding:11px 20px;
  border-left:2px solid transparent;
  white-space:nowrap;
}
.frame-nav__num{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.08em;
  color:var(--gray-400);
}
.frame-nav__label{
  font-family:var(--font-display);
  font-weight:700;
  font-size:15px;
  color:var(--paper-100);
  opacity:0;
  transform:translateX(-8px);
  transition:opacity .28s ease,transform .28s ease;
}
.frame-nav__link:hover,.frame-nav__link:focus-visible{background:var(--ink-850);border-left-color:var(--gold-500)}
.frame-nav__link:hover .frame-nav__label,.frame-nav__link:focus-visible .frame-nav__label{opacity:1;transform:none;color:var(--gold-300)}
.frame-nav__link[aria-current="page"]{border-left-color:var(--magenta-500);background:rgba(255,63,128,.06)}
.frame-nav__link[aria-current="page"] .frame-nav__num{color:var(--magenta-500)}
.frame-nav__link[aria-current="page"] .frame-nav__label{opacity:1;transform:none;color:var(--paper-100)}
.frame-nav__quick{
  margin-top:auto;
  display:flex;
  flex-direction:column;
  gap:6px;
  padding:16px 20px 0;
  border-top:1px solid var(--ink-700);
}
.frame-nav__quicklink{
  font-size:12px;
  letter-spacing:.04em;
  color:var(--gold-500);
  white-space:nowrap;
}
.frame-nav__quicklink:hover{color:var(--cyan-400)}
.frame-nav:hover,.frame-nav:focus-within{width:var(--rail-open)}
.frame-nav:hover .frame-nav__label,.frame-nav:focus-within .frame-nav__label{opacity:1;transform:none}
.nav-toggle{display:none}
.mobile-bar{display:none}

/* ---------- layout helpers ---------- */
.container{width:100%;max-width:var(--content-max);margin:0 auto;padding:0 24px}
.section{margin-bottom:64px}
.section:last-child{margin-bottom:32px}
.section__head{margin-bottom:28px;border-top:1px solid var(--ink-700);padding-top:18px}
.section__num{
  display:block;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.16em;
  color:var(--gold-500);
  margin-bottom:6px;
}
.section__title{margin-bottom:10px}
.section__lead{font-size:18px;line-height:1.7;color:var(--paper-100);opacity:.86}
.grid-12{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.col-3{grid-column:span 3}
.col-4{grid-column:span 4}
.col-5{grid-column:span 5}
.col-6{grid-column:span 6}
.col-7{grid-column:span 7}
.col-8{grid-column:span 8}
.data-rule{height:1px;background:linear-gradient(90deg,var(--gold-500),transparent);border:0;margin:32px 0}
.data-rule--skew{
  height:6px;
  background:repeating-linear-gradient(115deg,var(--gold-500) 0 10px,transparent 10px 22px);
  opacity:.5;
}

/* ---------- breadcrumb ---------- */
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;font-size:12px;letter-spacing:.06em;color:var(--gray-400);margin-bottom:24px}
.breadcrumb__item{color:var(--gold-500)}
.breadcrumb__item::after{content:"/";margin-left:8px;color:var(--ink-700)}
.breadcrumb__item:last-child::after{content:""}
.breadcrumb__item[aria-current="page"]{color:var(--gray-400)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:13px 26px;
  font-size:14px;
  font-weight:600;
  letter-spacing:.06em;
  border:1px solid var(--gold-500);
  color:var(--gold-300);
  background:transparent;
  box-shadow:var(--shadow-hard);
  transition:border-color .22s ease,transform .22s ease,box-shadow .22s ease,color .22s ease;
}
.btn:hover,.btn:focus-visible{border-color:var(--cyan-400);color:var(--cyan-400);transform:translateY(-4px);box-shadow:6px 6px 0 rgba(52,226,216,.2)}
.btn--gold{background:var(--gold-500);color:var(--ink-950);border-color:var(--gold-300)}
.btn--gold:hover,.btn--gold:focus-visible{background:var(--gold-300);color:var(--ink-950);border-color:var(--cyan-400)}
.btn--ghost{border-color:var(--ink-700);color:var(--paper-100)}
.btn--paper{background:var(--paper-100);color:var(--ink-950);border-color:var(--paper-300)}

/* ---------- cards ---------- */
.card{
  position:relative;
  background:var(--ink-850);
  border:1px solid var(--gold-500);
  box-shadow:var(--shadow-hard);
  padding:24px;
  transition:border-color .24s ease,transform .24s ease,box-shadow .24s ease;
}
.card:hover,.card:focus-within{border-color:var(--cyan-400);transform:translateY(-4px);box-shadow:6px 6px 0 rgba(52,226,216,.18)}
.card--offset{margin-top:32px}
.card--float{box-shadow:var(--shadow-gold)}
.card__label{
  display:block;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gold-500);
  margin-bottom:10px;
}
.card__title{margin-bottom:10px}
.card__meta{font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;color:var(--gray-400)}

/* ---------- tags ---------- */
.tag{
  display:inline-block;
  padding:3px 10px;
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  border:1px solid currentColor;
}
.tag--gold{color:var(--gold-300)}
.tag--cyan{color:var(--cyan-400)}
.tag--magenta{color:var(--magenta-500)}
.tag--amber{color:var(--amber-500)}

/* ---------- stats ---------- */
.stat{border-left:2px solid var(--gold-500);padding-left:16px}
.stat__num{
  display:block;
  font-family:var(--font-mono);
  font-size:clamp(28px,4vw,48px);
  line-height:1.1;
  letter-spacing:.02em;
  color:var(--gold-300);
}
.stat__label{display:block;font-size:12px;letter-spacing:.08em;color:var(--gray-400)}

/* ---------- paper block ---------- */
.paper-block{
  background:var(--paper-100);
  color:var(--ink-950);
  border:1px solid var(--paper-300);
  box-shadow:var(--shadow-hard);
  padding:32px;
}
.paper-block h2,.paper-block h3{color:var(--ink-950)}
.paper-block a{color:var(--jade-700)}
.paper-block a:hover{color:var(--magenta-500)}
.paper-block p{color:#15171b}

/* ---------- media frame ---------- */
.media-frame{
  position:relative;
  width:100%;
  aspect-ratio:16/10;
  overflow:hidden;
  background:linear-gradient(140deg,var(--ink-850),var(--ink-700));
  border:1px solid var(--gold-500);
  box-shadow:var(--shadow-hard);
}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--wide{aspect-ratio:21/9}
.media-frame__inner{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;display:block}

/* ---------- flow map ---------- */
.flow-map{position:relative;display:grid;gap:20px;padding-left:28px}
.flow-map::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:1px;background:linear-gradient(180deg,var(--gold-500),transparent)}
.flow-node{
  position:relative;
  background:var(--ink-850);
  border:1px solid var(--ink-700);
  padding:18px 20px;
}
.flow-node::before{
  content:"";
  position:absolute;
  left:-27px;top:22px;
  width:9px;height:9px;
  background:var(--ink-950);
  border:1px solid var(--cyan-400);
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .45s ease,transform .45s ease}
.reveal.is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:72px;
  border-top:1px solid var(--gold-500);
  background:linear-gradient(180deg,var(--ink-850),var(--ink-950));
  padding:56px 24px 32px;
}
.footer-grid{
  max-width:var(--content-max);
  margin:0 auto;
  display:grid;
  grid-template-columns:minmax(220px,1.4fr) repeat(3,minmax(120px,.7fr)) minmax(260px,1.6fr);
  gap:32px;
}
.footer-brand__mark{display:block;width:2px;height:16px;background:var(--gold-500);box-shadow:6px 0 0 var(--magenta-500);margin-bottom:14px}
.footer-brand__name{font-family:var(--font-display);font-weight:800;font-size:20px;color:var(--gold-300)}
.footer-brand__line{font-size:12px;letter-spacing:.06em;color:var(--gray-400);margin-top:4px}
.footer-brand__signoff{font-size:13px;color:var(--paper-300);margin-top:12px;border-left:2px solid var(--gold-500);padding-left:10px}
.footer-col__title{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.16em;
  color:var(--gold-500);
  margin-bottom:12px;
}
.footer-col__list li{margin-bottom:8px}
.footer-col__list a{color:var(--paper-100);font-size:14px}
.footer-col__list a:hover{color:var(--cyan-400)}
.footer-contact{
  background:var(--paper-100);
  color:var(--ink-950);
  border:1px solid var(--paper-300);
  box-shadow:var(--shadow-hard);
  padding:20px 22px;
}
.footer-contact__title{font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;color:var(--jade-700);margin-bottom:10px}
.footer-contact__list{display:grid;grid-template-columns:auto 1fr;gap:4px 12px;font-size:13px;line-height:1.7}
.footer-contact__list dt{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--gray-400)}
.footer-contact__list dd{color:#15171b;word-break:break-all}
.footer-contact__list a{color:var(--jade-700)}
.footer-contact__list a:hover{color:var(--magenta-500)}
.footer-legal{
  max-width:var(--content-max);
  margin:40px auto 0;
  padding-top:20px;
  border-top:1px solid var(--ink-700);
  display:flex;
  flex-wrap:wrap;
  gap:12px 32px;
  justify-content:space-between;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.04em;
  color:var(--gray-400);
}

/* ---------- to top ---------- */
.to-top{
  position:fixed;
  right:20px;
  bottom:24px;
  z-index:100;
  width:46px;height:46px;
  display:flex;align-items:center;justify-content:center;
  background:var(--ink-850);
  color:var(--gold-300);
  border:1px solid var(--gold-500);
  box-shadow:var(--shadow-hard);
  opacity:0;
  visibility:hidden;
  transform:translateY(12px);
  transition:opacity .28s ease,transform .28s ease,visibility .28s;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:none}
.to-top:hover,.to-top:focus-visible{border-color:var(--cyan-400);color:var(--cyan-400)}

/* ---------- responsive ---------- */
@media (min-width:900px){
  .site-shell{padding-left:var(--rail-w)}
  .site-shell:has(.frame-nav:hover){padding-left:var(--rail-w)}
  body{padding-bottom:0}
}
@media (min-width:1080px){
  .container{padding:0 48px}
}
@media (max-width:899px){
  :root{--rail-w:0px}
  .frame-nav{
    position:fixed;
    left:0;right:0;top:0;bottom:auto;
    width:100%;
    max-height:0;
    padding:0;
    border-right:0;
    border-bottom:1px solid var(--gold-500);
    transition:max-height .36s ease,padding .36s ease;
    overflow:hidden;
  }
  .frame-nav::after{display:none}
  .frame-nav[data-open]{
    max-height:calc(100vh - 60px);
    padding:20px 20px 28px;
    overflow-y:auto;
  }
  .frame-nav__label{opacity:1;transform:none}
  .frame-nav__brandcn,.frame-nav__branden,.frame-nav__line,.frame-nav__quicklink{white-space:normal}
  .frame-nav__quick{margin-top:18px}
  .nav-toggle{
    display:flex;
    align-items:center;
    gap:12px;
    position:fixed;
    top:0;left:0;right:0;
    z-index:95;
    height:60px;
    padding:0 20px;
    background:var(--ink-950);
    border-bottom:1px solid var(--gold-500);
    color:var(--gold-300);
    font-family:var(--font-mono);
    font-size:12px;
    letter-spacing:.16em;
    text-align:left;
  }
  .nav-toggle__bar{display:block;width:22px;height:2px;background:var(--gold-500);position:relative}
  .nav-toggle__bar::before,.nav-toggle__bar::after{
    content:"";position:absolute;left:0;width:22px;height:2px;background:var(--gold-500);transition:transform .28s ease,opacity .28s ease;
  }
  .nav-toggle__bar::before{top:-7px}
  .nav-toggle__bar::after{top:7px}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar{background:transparent}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::before{transform:translateY(7px) rotate(45deg);background:var(--cyan-400)}
  .nav-toggle[aria-expanded="true"] .nav-toggle__bar::after{transform:translateY(-7px) rotate(-45deg);background:var(--cyan-400)}
  .site-shell{padding-top:60px;padding-bottom:64px}
  .mobile-bar{
    display:flex;
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:95;
    background:var(--ink-850);
    border-top:1px solid var(--gold-500);
  }
  .mobile-bar__link{
    flex:1;
    padding:14px 4px;
    text-align:center;
    font-size:12px;
    letter-spacing:.08em;
    color:var(--paper-100);
    border-right:1px solid var(--ink-700);
  }
  .mobile-bar__link:last-child{border-right:0}
  .mobile-bar__link:hover{color:var(--cyan-400)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .footer-contact{grid-column:1 / -1}
  .to-top{bottom:76px}
  .grid-12{grid-template-columns:1fr}
  .col-3,.col-4,.col-5,.col-6,.col-7,.col-8{grid-column:1 / -1}
  .paper-block,.card{padding:22px}
}
@media (max-width:560px){
  .footer-grid{grid-template-columns:1fr}
  .footer-legal{flex-direction:column;gap:8px}
  h2{font-size:clamp(24px,6vw,32px)}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
  .btn:hover,.card:hover,.card:focus-within{transform:none}
}