:root{
  --ink-950:#071A14;
  --ink-900:#0C2B22;
  --ink-800:#123B30;
  --ink-700:#1A1F1D;
  --paper:#F2EFE6;
  --fog:#8A948F;
  --lime:#C6FF4A;
  --lime-soft:#E4FFA8;
  --gold:#E8B45A;
  --gold-deep:#8C6428;
  --line:rgba(138,148,143,.22);
  --line-strong:rgba(138,148,143,.42);
  --glass:rgba(18,59,48,.55);
  --shell:1320px;
  --gutter:clamp(1.15rem,4vw,3rem);
  --r:3px;
  --ease:cubic-bezier(.2,.8,.2,1);
  --font-display:"Noto Sans SC","Source Han Sans SC","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",sans-serif;
  --font-mono:ui-monospace,"SFMono-Regular","JetBrains Mono","Roboto Mono",Menlo,Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-body);
  font-size:16px;
  font-weight:400;
  line-height:1.75;
  letter-spacing:.01em;
  color:var(--paper);
  background-color:var(--ink-950);
  background-image:
    radial-gradient(1100px 560px at 88% -12%,rgba(198,255,74,.075),transparent 68%),
    radial-gradient(880px 520px at 4% 2%,rgba(232,180,90,.06),transparent 62%),
    repeating-linear-gradient(90deg,rgba(138,148,143,.055) 0 1px,transparent 1px 120px);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,h5,h6,p{margin:0}
::selection{background:var(--lime);color:var(--ink-950)}
:focus-visible{outline:2px solid var(--lime-soft);outline-offset:3px;border-radius:2px}

/* ---------- shell & typography base ---------- */
.shell{width:100%;max-width:var(--shell);margin-inline:auto;padding-inline:var(--gutter)}
.section-head{display:grid;gap:.55rem;margin-bottom:clamp(1.5rem,3vw,2.5rem)}
.section-head__title{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3.4vw,2.6rem);
  font-weight:900;
  line-height:1.06;
  letter-spacing:-.03em;
  font-stretch:95%;
}
.section-head__lede{max-width:62ch;font-size:1rem;color:rgba(242,239,230,.72)}
.eyebrow{
  display:inline-flex;align-items:center;gap:.5rem;
  font-family:var(--font-mono);font-size:.7rem;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;color:var(--lime);
}
.eyebrow::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:currentColor;box-shadow:0 0 0 3px rgba(198,255,74,.16);
}
.tag{
  display:inline-flex;align-items:center;gap:.35rem;
  padding:.22rem .6rem;border-radius:999px;
  border:1px solid rgba(198,255,74,.35);
  background:rgba(198,255,74,.07);
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.12em;color:var(--lime-soft);
}
.tag--gold{border-color:rgba(232,180,90,.42);background:rgba(232,180,90,.08);color:var(--gold)}
.tag--muted{border-color:var(--line-strong);background:rgba(138,148,143,.06);color:var(--fog)}
.panel{
  position:relative;
  background:var(--ink-900);
  border:1px solid var(--line);
  border-radius:var(--r);
  padding:clamp(1.25rem,2.5vw,2rem);
}
.panel--glass{background:var(--glass);border-color:rgba(198,255,74,.22);backdrop-filter:blur(12px)}
.rule{height:1px;border:0;margin:0;background:var(--line)}
.grid{display:grid;gap:clamp(1rem,2.5vw,2rem)}
.grid--2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid--3{grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.45rem;
  min-height:42px;padding:.62rem 1.05rem;
  border:1px solid transparent;border-radius:2px;
  background:transparent;color:var(--paper);
  font-family:var(--font-body);font-size:.85rem;font-weight:700;letter-spacing:.02em;
  cursor:pointer;
  transition:background-color .18s var(--ease),color .18s var(--ease),
             border-color .18s var(--ease),transform .18s var(--ease),box-shadow .18s var(--ease);
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn--primary{
  background:var(--lime);color:var(--ink-950);
  box-shadow:0 0 0 1px rgba(198,255,74,.35),0 12px 26px -16px rgba(198,255,74,.75);
}
.btn--primary:hover{background:var(--lime-soft);box-shadow:0 0 0 1px rgba(228,255,168,.5),0 16px 30px -16px rgba(198,255,74,.85)}
.btn--quiet{border-color:rgba(232,180,90,.5);color:var(--gold)}
.btn--quiet:hover{border-color:var(--gold);background:rgba(232,180,90,.1)}
.btn--solid{background:var(--ink-800);border-color:var(--line-strong);color:var(--paper)}
.btn--solid:hover{border-color:var(--lime);color:var(--lime)}
.btn--block{width:100%}

/* ---------- skip link ---------- */
.skip-link{
  position:fixed;top:.6rem;left:.6rem;z-index:200;
  padding:.7rem 1.05rem;border-radius:2px;
  background:var(--lime);color:var(--ink-950);
  font-size:.85rem;font-weight:800;
  transform:translateY(-180%);
  transition:transform .18s var(--ease);
}
.skip-link:focus{transform:translateY(0);outline:2px solid var(--ink-950);outline-offset:2px}

/* ---------- header : command bar ---------- */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(7,26,20,.9);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  transition:box-shadow .22s var(--ease),background-color .22s var(--ease);
}
.site-header[data-scrolled]{
  background:rgba(7,26,20,.97);
  box-shadow:0 22px 44px -34px #000;
}
.command-bar{
  width:100%;max-width:1440px;margin-inline:auto;
  padding-inline:var(--gutter);
  padding-block:clamp(.6rem,1.2vw,.9rem);
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  gap:clamp(.75rem,2vw,2rem);
  transition:padding-block .22s var(--ease);
}
.site-header[data-scrolled] .command-bar{padding-block:.4rem}

.brand{display:inline-flex;align-items:center;gap:.6rem;flex:0 0 auto}
.brand__mark{
  position:relative;flex:0 0 auto;
  width:28px;height:28px;
  display:grid;place-items:center;
  background:var(--ink-950);
  border:1px solid var(--lime);
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.brand__mark::before{
  content:"";width:11px;height:11px;background:var(--lime);
  clip-path:polygon(0 0,100% 0,0 100%);
  transition:background-color .18s var(--ease);
}
.brand__mark::after{
  content:"";position:absolute;right:-1px;bottom:-1px;
  width:9px;height:9px;background:var(--gold);
  clip-path:polygon(100% 0,100% 100%,0 100%);
}
.brand:hover .brand__mark{border-color:var(--lime-soft);background:var(--ink-900)}
.brand:hover .brand__mark::before{background:var(--lime-soft)}
.brand__text{display:block;min-width:0}
.brand__name{
  display:block;line-height:1.15;
  font-family:var(--font-display);
  font-size:1.02rem;font-weight:900;letter-spacing:-.02em;color:var(--paper);
}
.brand__meta{
  display:block;margin-top:.16rem;
  font-family:var(--font-mono);font-size:.55rem;font-weight:600;
  letter-spacing:.26em;color:var(--fog);
}

.command-nav{display:block;justify-self:center;min-width:0}
.command-nav__list{display:flex;flex-wrap:nowrap;align-items:center;gap:clamp(.1rem,.7vw,.5rem)}
.command-nav__item{display:flex}
.command-nav__link{
  position:relative;display:inline-flex;align-items:baseline;gap:.35rem;
  padding:.55rem .5rem;
  color:rgba(242,239,230,.75);
  font-size:.875rem;font-weight:600;letter-spacing:.01em;
  transition:color .18s var(--ease);
}
.command-nav__link::after{
  content:"";position:absolute;left:.5rem;right:.5rem;bottom:.28rem;height:2px;
  background:var(--lime);
  transform:scaleX(0);transform-origin:left center;
  transition:transform .18s var(--ease),background-color .18s var(--ease);
}
.command-nav__link:hover{color:var(--paper)}
.command-nav__link:hover::after{transform:scaleX(1)}
.command-nav__index{
  font-family:var(--font-mono);font-size:.6rem;font-weight:600;
  letter-spacing:.08em;color:var(--gold-deep);
  transition:color .18s var(--ease);
}
.command-nav__link:hover .command-nav__index{color:var(--gold)}
.command-nav__label{display:inline-flex;align-items:center;white-space:nowrap}
.command-nav__label::before{
  content:"";display:inline-block;
  width:5px;height:5px;margin-right:.42em;border-radius:50%;
  background:var(--lime);
  opacity:0;transform:scale(.6);
  transition:opacity .18s var(--ease),transform .18s var(--ease);
}
.command-nav__link:hover .command-nav__label::before,
.command-nav__link:focus-visible .command-nav__label::before{opacity:.6;transform:scale(1)}
.command-nav__link[aria-current="page"]{color:var(--paper)}
.command-nav__link[aria-current="page"] .command-nav__index{color:var(--lime)}
.command-nav__link[aria-current="page"] .command-nav__label::before{
  opacity:1;transform:scale(1);
  box-shadow:0 0 0 3px rgba(198,255,74,.18);
}
.command-nav__link[aria-current="page"]::after{transform:scaleX(1)}

.command-bar__actions{display:flex;align-items:center;gap:clamp(.4rem,1vw,.85rem);flex:0 0 auto}
.command-bar__member{
  display:inline-flex;align-items:center;gap:.45rem;
  padding:.4rem .2rem;
  border-bottom:1px solid transparent;
  font-size:.8rem;font-weight:600;color:var(--gold);
  transition:border-color .18s var(--ease),color .18s var(--ease);
}
.command-bar__member::before{
  content:"";width:5px;height:5px;border-radius:50%;
  background:var(--gold);box-shadow:0 0 0 3px rgba(232,180,90,.16);
}
.command-bar__member:hover{border-bottom-color:var(--gold);color:#F3CE8B}

.nav-toggle{
  display:none;align-items:center;gap:.45rem;
  min-width:46px;min-height:44px;padding:.4rem .6rem;
  background:rgba(18,59,48,.5);
  border:1px solid var(--line-strong);
  border-radius:2px;color:var(--paper);
  cursor:pointer;
  transition:border-color .18s var(--ease),background-color .18s var(--ease);
}
.nav-toggle:hover{border-color:var(--lime);background:rgba(18,59,48,.8)}
.nav-toggle__bars{display:grid;gap:4px;width:16px}
.nav-toggle__bars span{
  display:block;height:2px;background:currentColor;
  transition:transform .22s var(--ease),opacity .22s var(--ease);
}
.nav-toggle__text{font-family:var(--font-mono);font-size:.62rem;letter-spacing:.18em}
.nav-toggle[aria-expanded="true"]{border-color:var(--lime);color:var(--lime)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:first-child{transform:translateY(3px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars span:last-child{transform:translateY(-3px) rotate(-45deg)}

.command-bar__progress{
  position:absolute;left:0;right:0;bottom:-1px;height:2px;
  background:rgba(198,255,74,.12);
  overflow:hidden;pointer-events:none;
}
.command-bar__progress-fill{
  display:block;width:100%;height:100%;
  background:linear-gradient(90deg,var(--lime),var(--gold));
  transform:scaleX(0);transform-origin:left center;
  transition:transform .1s linear;
}

/* ---------- breadcrumb ---------- */
.breadcrumb{font-family:var(--font-mono);font-size:.72rem;letter-spacing:.08em;color:var(--fog)}
.breadcrumb__list{display:flex;flex-wrap:wrap;align-items:center;gap:.4rem}
.breadcrumb__item{display:inline-flex;align-items:center;gap:.4rem}
.breadcrumb__item + .breadcrumb__item::before{content:"/";color:var(--gold-deep)}
.breadcrumb__link{color:var(--fog);transition:color .18s var(--ease)}
.breadcrumb__link:hover{color:var(--lime)}
.breadcrumb__current{color:var(--paper)}

/* ---------- media frame base ---------- */
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/9;
  background:linear-gradient(140deg,var(--ink-800),var(--ink-700));
  border:1px solid var(--line);
  clip-path:polygon(0 0,100% 0,100% calc(100% - 20px),calc(100% - 20px) 100%,0 100%);
}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    repeating-linear-gradient(90deg,rgba(198,255,74,.06) 0 1px,transparent 1px 44px),
    repeating-linear-gradient(0deg,rgba(198,255,74,.045) 0 1px,transparent 1px 44px);
}
.media-frame__img{width:100%;height:100%;object-fit:cover}
.media-frame__tag{position:absolute;top:.85rem;left:.85rem;z-index:2}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:3/4}
.media-frame--square{aspect-ratio:1/1}

/* ---------- reveal protocol ---------- */
.has-js [data-reveal]{
  opacity:0;transform:translateY(14px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-js [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(3.5rem,8vw,7rem);
  background:var(--ink-900);
  border-top:1px solid rgba(198,255,74,.2);
  overflow:hidden;
}
.site-footer::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.75;
  background-image:
    repeating-linear-gradient(90deg,rgba(138,148,143,.07) 0 1px,transparent 1px 96px),
    repeating-linear-gradient(0deg,rgba(138,148,143,.05) 0 1px,transparent 1px 96px);
}
.site-footer > .shell{position:relative;z-index:1}
.site-footer__inner{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,1.7fr);
  gap:clamp(2rem,5vw,4.5rem);
  padding-block:clamp(2.5rem,5vw,4rem) clamp(1.75rem,3.5vw,2.75rem);
}
.site-footer__lead{min-width:0}
.site-footer__stamp{
  font-family:var(--font-mono);font-size:.64rem;font-weight:600;
  letter-spacing:.22em;color:var(--gold);margin-bottom:.9rem;
}
.site-footer__wordmark{
  font-family:var(--font-display);
  font-size:clamp(1.6rem,3vw,2.2rem);
  font-weight:900;line-height:1.04;letter-spacing:-.03em;
  color:var(--paper);
}
.site-footer__tagline{
  margin-top:.85rem;max-width:34ch;
  font-size:.95rem;line-height:1.75;color:rgba(242,239,230,.72);
}
.site-footer__cta{margin-top:1.6rem}
.site-footer__nav{
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(1rem,2.5vw,2rem);
}
.footer-col{min-width:0}
.footer-col__title{
  margin-bottom:.9rem;padding-bottom:.55rem;
  border-bottom:1px solid rgba(198,255,74,.22);
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.22em;color:var(--lime);
}
.footer-list{display:grid;gap:.15rem}
.footer-link{
  display:inline-block;padding:.3rem 0;
  font-size:.92rem;color:rgba(242,239,230,.78);
  transition:color .18s var(--ease),transform .18s var(--ease);
}
.footer-link:hover{color:var(--lime);transform:translateX(3px)}
.site-footer__contact{
  display:grid;
  grid-template-columns:minmax(140px,auto) minmax(0,1fr);
  gap:1rem clamp(1rem,3vw,3rem);
  align-items:start;
  padding-block:clamp(1.25rem,2.5vw,1.85rem);
  border-top:1px solid rgba(138,148,143,.18);
}
.site-footer__contact-title{
  font-family:var(--font-mono);font-size:.68rem;font-weight:600;
  letter-spacing:.2em;color:var(--lime);
}
.footer-contact-list{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(175px,1fr));
  gap:.85rem 1.5rem;
}
.footer-contact__item{display:grid;gap:.12rem;min-width:0}
.footer-contact__label{
  font-family:var(--font-mono);font-size:.62rem;font-weight:600;
  letter-spacing:.2em;color:var(--gold);
}
.footer-contact__value{
  font-size:.88rem;line-height:1.6;
  color:rgba(242,239,230,.86);word-break:break-word;
}
.site-footer__base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:.6rem 1.5rem;
  padding-block:1rem 1.85rem;
  border-top:1px solid rgba(138,148,143,.18);
  font-family:var(--font-mono);font-size:.7rem;letter-spacing:.05em;color:var(--fog);
}
.site-footer__copyright{margin:0}
.site-footer__legal{display:flex;flex-wrap:wrap;gap:.35rem 1rem;margin:0}
.site-footer__legal-link{color:var(--fog);transition:color .18s var(--ease)}
.site-footer__legal-link:hover{color:var(--lime)}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .command-nav__link{font-size:.82rem;padding-inline:.42rem}
  .command-nav__link::after{left:.42rem;right:.42rem}
  .command-bar__member{display:none}
}
@media (max-width:1024px){
  .command-bar{
    grid-template-columns:auto auto;
    justify-content:space-between;
    gap:.75rem;
  }
  .nav-toggle{display:inline-flex}
  .command-nav{
    position:absolute;left:0;right:0;top:100%;
    display:block;justify-self:stretch;
    max-height:0;overflow:hidden;opacity:0;pointer-events:none;
    background:rgba(7,26,20,.985);
    border-bottom:1px solid var(--line-strong);
    box-shadow:0 30px 60px -34px #000;
    transition:max-height .3s var(--ease),opacity .22s var(--ease);
  }
  .command-nav[data-open="true"]{
    max-height:min(72vh,540px);
    overflow-y:auto;opacity:1;pointer-events:auto;
  }
  .command-nav__list{
    flex-direction:column;align-items:stretch;gap:0;
    padding:.5rem var(--gutter) 1.1rem;
  }
  .command-nav__item{display:block}
  .command-nav__link{
    width:100%;min-height:48px;padding:.9rem .25rem;
    font-size:1rem;
    border-bottom:1px solid rgba(138,148,143,.14);
  }
  .command-nav__link::after{left:.25rem;right:.25rem;bottom:.35rem}
  .command-nav__index{font-size:.66rem}
  .site-footer__inner{grid-template-columns:1fr}
}
@media (max-width:860px){
  .site-footer__nav{grid-template-columns:repeat(3,minmax(0,1fr));gap:1.25rem}
}
@media (max-width:640px){
  .brand__meta{display:none}
  .brand__name{font-size:.95rem}
  .command-bar__actions .btn--primary{display:none}
  .site-footer__nav{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer__contact{grid-template-columns:1fr;gap:.85rem}
  .site-footer__base{flex-direction:column;align-items:flex-start}
}
@media (max-width:420px){
  .brand__mark{width:24px;height:24px}
  .site-footer__nav{grid-template-columns:1fr}
}

/* ---------- reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
  .btn:hover,.footer-link:hover{transform:none}
  .footer-link:hover{transform:none}
  .has-js [data-reveal]{opacity:1 !important;transform:none !important}
  .command-bar__progress-fill{transition:none}
}