:root{
  --ink:#06101E;
  --panel:#0B1B2E;
  --panel-lift:#122A44;
  --line:#16314C;
  --text:#E8F2FF;
  --muted:#8AA0B8;
  --mint:#35F0C0;
  --mint-deep:#1B8F78;
  --amber:#FFB347;
  --amber-soft:#FFD79A;
  --rail:0px;
  --cut:18px;
  --wrap:1280px;
  --pad-x:clamp(18px,4vw,56px);
  --font-display:"Oswald","Barlow Condensed","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-body:"Noto Sans SC","Source Han Sans SC","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img,svg,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p,figure{margin:0}
button{font:inherit;color:inherit;background:none;border:0}
:focus-visible{outline:2px solid var(--mint);outline-offset:3px;border-radius:1px}
::selection{background:var(--mint);color:#04140F}

.visually-hidden{
  position:absolute;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.eyebrow{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--muted);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--mint);flex:none}
.display{
  font-family:var(--font-display);font-weight:300;
  line-height:.98;letter-spacing:-.02em;
}
.rule{height:1px;background:var(--line);border:0;margin:0}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;left:var(--rail);top:0;z-index:140;
  transform:translateY(-140%);
  padding:10px 18px;
  background:var(--mint);color:#04140F;
  font-family:var(--font-mono);font-size:12px;font-weight:700;letter-spacing:.1em;
  transition:transform .18s ease;
}
.skip-link:focus-visible{transform:translateY(0);outline:2px solid var(--amber-soft);outline-offset:-4px}

/* ---------- header : frame rail ---------- */
.site-header{
  position:sticky;top:0;z-index:95;
  width:100%;
  background:rgba(6,16,30,.94);
  border-bottom:1px solid var(--line);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
}
.frame-rail{
  display:flex;align-items:center;flex-wrap:nowrap;gap:14px;
  width:100%;max-width:var(--wrap);
  margin:0 auto;
  padding:11px var(--pad-x);
}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0;color:var(--text)}
.brand__mark{
  flex:none;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.2em;line-height:1;
  color:var(--mint);
  border:1px solid var(--mint-deep);
  padding:5px 7px;
}
.brand__text{display:flex;flex-direction:column;gap:2px;min-width:0}
.brand__name{
  font-family:var(--font-display);font-weight:500;
  font-size:17px;line-height:1.15;letter-spacing:.02em;
  white-space:nowrap;
}
.brand__tagline{
  font-family:var(--font-mono);font-size:10px;letter-spacing:.14em;line-height:1.3;
  color:var(--muted);
}
.nav-toggle{
  margin-left:auto;flex:none;
  display:inline-flex;align-items:center;gap:10px;
  padding:10px 13px;
  background:rgba(11,27,46,.7);
  border:1px solid var(--line);
  color:var(--text);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.16em;
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.nav-toggle:hover{border-color:var(--mint);color:var(--mint)}
.nav-toggle__bars{display:inline-flex;flex-direction:column;gap:4px;width:16px;flex:none}
.nav-toggle__bars span{display:block;height:1px;width:100%;background:currentColor;transition:transform .2s ease,opacity .2s ease}
.nav-toggle__label{line-height:1}
.site-header[data-open] .nav-toggle{border-color:var(--mint);color:var(--mint);background:rgba(53,240,192,.08)}
.site-header[data-open] .nav-toggle__bars span:nth-child(1){transform:translateY(5px) rotate(45deg)}
.site-header[data-open] .nav-toggle__bars span:nth-child(2){opacity:0}
.site-header[data-open] .nav-toggle__bars span:nth-child(3){transform:translateY(-5px) rotate(-45deg)}

@keyframes nav-in{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.site-nav{
  display:none;
  position:absolute;top:100%;left:0;right:0;
  max-height:calc(100vh - 64px);overflow-y:auto;
  padding:8px var(--pad-x) 18px;
  background:rgba(7,18,32,.99);
  border-bottom:1px solid var(--line);
  box-shadow:0 26px 60px rgba(2,8,16,.72);
}
.site-header[data-open] .site-nav{display:block;animation:nav-in .2s ease both}
.site-nav__list{display:flex;flex-direction:column}
.site-nav__item{border-top:1px solid var(--line)}
.site-nav__item:last-child{border-bottom:1px solid var(--line)}
.site-nav__link{
  position:relative;
  display:flex;align-items:baseline;gap:12px;
  padding:11px 6px 11px 13px;
  color:var(--text);
  transition:color .18s ease,background .18s ease;
}
.site-nav__link::before{
  content:"";position:absolute;left:0;top:50%;
  width:2px;height:0;background:var(--mint);
  transform:translateY(-50%);
  transition:height .2s ease;
}
.site-nav__link:hover{color:var(--mint);background:rgba(53,240,192,.05)}
.site-nav__link:hover::before{height:58%}
.site-nav__link[aria-current="page"]{color:var(--mint)}
.site-nav__link[aria-current="page"]::before{height:100%}
.site-nav__index{font-family:var(--font-mono);font-size:10px;letter-spacing:.12em;color:var(--muted);flex:none}
.site-nav__link[aria-current="page"] .site-nav__index{color:var(--amber)}
.site-nav__label{font-size:15px;letter-spacing:.02em}
.rail-utility{display:none}

/* ---------- main layout helpers ---------- */
.shell{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--pad-x)}
.shell--flush{padding-inline:0}
.section{position:relative;padding-block:clamp(36px,6vw,84px)}
.section__head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:14px 28px;margin-bottom:clamp(18px,3vw,34px);
}
.section__title{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(26px,4.4vw,52px);line-height:1.04;letter-spacing:-.015em;
}
.section__lead{max-width:56ch;color:var(--muted);font-size:15px;line-height:1.8}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2,.grid--3{grid-template-columns:1fr}
@media (min-width:720px){
  .grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid--3{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1024px){
  .grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
}

/* ---------- panels ---------- */
.panel{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  padding:clamp(18px,2.6vw,32px);
}
.panel--lift{background:var(--panel-lift);border-color:rgba(53,240,192,.22)}
.panel--notch{
  border:0;
  background:linear-gradient(158deg,rgba(18,42,68,.95),rgba(11,27,46,.98));
  clip-path:polygon(0 0,calc(100% - var(--cut)) 0,100% var(--cut),100% 100%,var(--cut) 100%,0 calc(100% - var(--cut)));
}

/* ---------- tags ---------- */
.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:3px 9px;
  font-family:var(--font-mono);font-size:10.5px;letter-spacing:.12em;line-height:1.6;
  border:1px solid var(--line);color:var(--muted);
  white-space:nowrap;
}
.tag--mint{border-color:rgba(53,240,192,.4);color:var(--mint);background:rgba(53,240,192,.07)}
.tag--amber{border-color:rgba(255,179,71,.45);color:var(--amber);background:rgba(255,179,71,.08)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.55em;
  min-height:46px;padding:0 22px;
  border:1px solid var(--line);
  color:var(--text);background:transparent;
  font-family:var(--font-body);font-size:14px;font-weight:600;letter-spacing:.06em;
  cursor:pointer;
  transition:background .18s ease,color .18s ease,border-color .18s ease;
}
.btn--primary{background:var(--mint);border-color:var(--mint);color:#04140F;font-weight:700}
.btn--primary:hover{background:var(--mint-deep);border-color:var(--mint-deep);color:#F2FFFB}
.btn--ghost{border-color:var(--line);color:var(--text)}
.btn--ghost:hover{border-color:var(--mint);color:var(--mint);background:rgba(53,240,192,.06)}
.btn--quiet{border-color:transparent;color:var(--muted);padding:0 6px;min-height:40px}
.btn--quiet:hover{color:var(--mint)}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:11px;letter-spacing:.12em;color:var(--muted)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb__list li{display:flex;align-items:center;gap:8px}
.breadcrumb__list li+li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--muted);transition:color .18s ease}
.breadcrumb a:hover{color:var(--mint)}
.breadcrumb [aria-current="page"]{color:var(--text)}

/* ---------- media containers ---------- */
.media{
  position:relative;display:block;overflow:hidden;
  border:1px solid var(--line);
  aspect-ratio:16/10;
  background:
    radial-gradient(120% 120% at 16% 8%,rgba(53,240,192,.14),transparent 56%),
    linear-gradient(156deg,#10263C,#071422 74%);
}
.media::after{
  content:"";position:absolute;inset:0;
  background:repeating-linear-gradient(115deg,rgba(22,49,76,.55) 0 1px,transparent 1px 22px);
  opacity:.55;pointer-events:none;
}
.media__img{position:relative;z-index:1;width:100%;height:100%;object-fit:cover}
.media--wide{aspect-ratio:21/9}
.media--tall{aspect-ratio:4/5}
.media--square{aspect-ratio:1/1}

/* ---------- reveal ---------- */
[data-reveal]{transition:opacity .6s ease,transform .6s cubic-bezier(.22,.8,.28,1)}
.js [data-reveal]{opacity:0;transform:translateY(14px)}
.js [data-reveal].is-in{opacity:1;transform:none}

/* ---------- scroll progress ---------- */
.scroll-progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:130;
  background:transparent;pointer-events:none;
}
.scroll-progress__bar{
  height:100%;width:0;
  background:linear-gradient(90deg,var(--mint-deep),var(--mint));
  box-shadow:0 0 12px rgba(53,240,192,.55);
}

/* ---------- footer ---------- */
.site-footer{
  position:relative;overflow:hidden;
  margin-top:clamp(44px,7vw,96px);
  background:linear-gradient(180deg,rgba(11,27,46,.92),rgba(6,16,30,1) 72%);
  border-top:1px solid var(--line);
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    linear-gradient(118deg,transparent 0 43%,rgba(22,49,76,.8) 43% 43.12%,transparent 43.12%),
    linear-gradient(118deg,transparent 0 58%,rgba(53,240,192,.12) 58% 58.18%,transparent 58.18%),
    linear-gradient(118deg,transparent 0 71%,rgba(53,240,192,.06) 71% 71.12%,transparent 71.12%);
}
.footer__inner{
  position:relative;
  width:100%;max-width:var(--wrap);margin:0 auto;
  padding:clamp(36px,5vw,72px) var(--pad-x) 24px;
}
.footer__top{display:grid;gap:clamp(26px,3.4vw,44px);padding-bottom:clamp(24px,3.4vw,40px);border-bottom:1px solid var(--line)}
.footer__identity{min-width:0}
.footer__wordmark{
  font-family:var(--font-display);font-weight:300;
  font-size:clamp(46px,10vw,108px);line-height:.9;letter-spacing:-.02em;
  color:rgba(232,242,255,.16);
  margin-bottom:12px;
}
.footer__line{font-size:15px;font-weight:600;letter-spacing:.04em}
.footer__note{margin-top:8px;max-width:34ch;color:var(--muted);font-size:14px;line-height:1.8}
.footer__hours{margin-top:14px;font-size:11px;letter-spacing:.12em;color:var(--mint)}
.footer__cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(148px,1fr));gap:clamp(18px,3vw,32px)}
.footer__col{min-width:0}
.footer__heading{
  font-family:var(--font-mono);font-size:11px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:12px;
}
.footer__list{display:flex;flex-direction:column;gap:2px}
.footer__item{font-size:13.5px;line-height:1.85;min-width:0}
.footer__link{display:inline-block;padding:3px 0;color:rgba(232,242,255,.82);transition:color .18s ease}
.footer__link:hover{color:var(--mint)}
.footer__contact{
  display:block;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.02em;line-height:1.9;
  color:rgba(232,242,255,.72);
  overflow-wrap:anywhere;
}
.footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 26px;
  margin-top:clamp(22px,3vw,34px);padding-top:18px;
  border-top:1px solid rgba(22,49,76,.7);
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--muted);
}
.footer__copyright,.footer__icp,.footer__domain{font-size:11px}
.footer__domain{color:rgba(138,160,184,.7)}

/* ---------- tablet ---------- */
@media (min-width:720px){
  .brand__name{font-size:18px}
  .site-nav__label{font-size:16px}
  .footer__top{grid-template-columns:minmax(0,1fr) minmax(0,1.5fr)}
}

/* ---------- desktop : fixed left rail ---------- */
@media (min-width:1024px){
  :root{--rail:124px}
  body{padding-left:var(--rail)}
  .site-header{
    position:fixed;inset:0 auto 0 0;width:var(--rail);
    border-bottom:0;border-right:1px solid var(--line);
    background:linear-gradient(180deg,rgba(9,22,38,.99),rgba(6,16,30,.99));
    -webkit-backdrop-filter:none;backdrop-filter:none;
  }
  .frame-rail{
    flex-direction:column;align-items:stretch;flex-wrap:nowrap;
    height:100%;max-width:none;margin:0;
    padding:22px 12px 18px;gap:0;
  }
  .brand{flex-direction:column;align-items:flex-start;gap:8px}
  .brand__mark{font-size:10px;letter-spacing:.18em;padding:4px 6px}
  .brand__name{font-size:15px;letter-spacing:.06em;white-space:normal}
  .brand__tagline{font-size:9.5px;letter-spacing:.1em;line-height:1.6}
  .nav-toggle{display:none}
  .site-nav{
    position:static;display:block;
    flex:1 1 auto;min-height:0;overflow-y:auto;
    max-height:none;
    margin-top:20px;padding:14px 0 0;
    background:none;border:0;border-top:1px solid var(--line);
    box-shadow:none;animation:none;
  }
  .site-header[data-open] .site-nav{display:block;animation:none}
  .site-nav__list{flex-direction:column}
  .site-nav__item{border-top:0;border-bottom:0}
  .site-nav__link{
    flex-direction:column;align-items:flex-start;gap:1px;
    padding:11px 2px 11px 12px;
  }
  .site-nav__index{font-size:9px;letter-spacing:.16em;opacity:.75}
  .site-nav__label{font-size:13px;letter-spacing:.03em;white-space:nowrap}
  .rail-utility{
    display:flex;flex-direction:column;gap:7px;flex:none;
    margin-top:16px;padding-top:14px;
    border-top:1px solid var(--line);
  }
  .rail-utility__link{
    font-size:11px;letter-spacing:.03em;line-height:1.6;
    color:var(--muted);
    transition:color .18s ease;
  }
  .rail-utility__link:hover{color:var(--mint)}
  .rail-utility__note{
    font-family:var(--font-mono);font-size:9px;letter-spacing:.06em;line-height:1.6;
    color:rgba(138,160,184,.55);
  }
  .scroll-progress{left:var(--rail);right:0}
  .footer__top{grid-template-columns:minmax(0,1.05fr) minmax(0,1.45fr)}
}

/* ---------- motion preferences ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
  }
  .js [data-reveal]{opacity:1;transform:none}
  .scroll-progress__bar{transition:none}
}