:root{
  --bg-deep:#071A16;
  --bg-carbon:#111614;
  --bg-pitch:#0E2C24;
  --lime:#C6FF3D;
  --orange:#FF7A18;
  --white:#F2F7F4;
  --alert:#FF3B4E;
  --mist:#7FB3A4;
  --line:#2A3B3E;
  --lime-veil:rgba(198,255,61,.12);
  --font-display:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,sans-serif;
  --font-body:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --font-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --shell:1320px;
  --edge:clamp(16px,4vw,40px);
  --radius:3px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background-color:var(--bg-deep);
  color:var(--white);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:
    repeating-linear-gradient(118deg,rgba(198,255,61,.045) 0 1px,transparent 1px 120px),
    repeating-linear-gradient(0deg,rgba(127,179,164,.05) 0 1px,transparent 1px 260px);
}
#main-content{position:relative;z-index:1;display:block}
h1,h2,h3,h4,h5,p,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
a{color:inherit}
img,svg{max-width:100%}
button{font:inherit;color:inherit}
::selection{background:var(--lime);color:#06170F}
a:focus-visible,button:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--lime);outline-offset:3px;border-radius:2px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:.06em}
.shell{width:100%;max-width:var(--shell);margin:0 auto;padding:0 var(--edge)}

/* ---------- header ---------- */
.skip-link{
  position:absolute;top:-72px;left:var(--edge);z-index:120;
  padding:12px 22px;background:var(--lime);color:#06170F;
  font-weight:800;font-size:14px;letter-spacing:.06em;text-decoration:none;
  border-radius:2px;transition:top .2s ease;
}
.skip-link:focus{top:10px}
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg,#0B231D 0%,#071A16 78%);
  border-bottom:1px solid var(--line);
  transition:background .3s ease,box-shadow .3s ease;
}
.site-header.is-stuck{
  background:rgba(7,26,22,.94);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  box-shadow:0 12px 34px rgba(0,0,0,.5);
}
.scroll-progress{position:absolute;left:0;right:0;top:0;height:2px;z-index:3;background:rgba(242,247,244,.05)}
.scroll-progress > span{
  display:block;height:100%;width:100%;
  background:linear-gradient(90deg,var(--lime),var(--orange));
  transform:scaleX(0);transform-origin:0 50%;
  transition:transform .12s linear;
}
.header-rail{
  display:flex;align-items:center;gap:clamp(12px,3vw,32px);
  max-width:var(--shell);margin:0 auto;
  padding:10px var(--edge);
  border-bottom:1px solid var(--line);
  font-size:12px;letter-spacing:.04em;color:var(--mist);
  overflow:hidden;max-height:96px;
  transition:max-height .32s ease,opacity .28s ease,padding .32s ease,border-color .3s ease;
}
.site-header.is-stuck .header-rail{
  max-height:0;opacity:0;padding-top:0;padding-bottom:0;border-bottom-color:transparent;
}
.rail-brand{display:flex;align-items:center;gap:10px;min-width:0}
.rail-mark{
  font-family:var(--font-mono);font-size:11px;font-weight:800;letter-spacing:.08em;
  color:#06170F;background:var(--lime);padding:1px 6px;
  display:inline-block;transform:skewX(-8deg);flex:none;
}
.rail-line{
  font-size:12px;color:var(--mist);margin:0;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46ch;
}
.rail-status{display:flex;align-items:center;gap:clamp(10px,2vw,26px);flex:none}
.status-item{display:flex;align-items:baseline;gap:6px;white-space:nowrap}
.status-key{color:var(--mist)}
.status-val{color:var(--lime);font-size:11.5px;font-weight:700}
.rail-utility{margin-left:auto;display:flex;align-items:center;gap:clamp(12px,1.8vw,22px);flex:none}
.utility-link{
  position:relative;display:inline-flex;align-items:center;
  font-size:12px;letter-spacing:.08em;color:var(--white);text-decoration:none;
  padding-bottom:2px;border-bottom:1px solid var(--line);
  transition:color .2s ease,border-color .2s ease;
}
.utility-link:hover{color:var(--lime);border-bottom-color:var(--lime)}
.utility-link--alert{color:#FF8A97;border-bottom-color:rgba(255,59,78,.45)}
.utility-link--alert::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--alert);margin-right:6px;
  box-shadow:0 0 8px rgba(255,59,78,.9);
  animation:signal 2.6s ease-in-out infinite;
}
.utility-link--alert:hover{color:var(--alert);border-bottom-color:var(--alert)}
@keyframes signal{0%,100%{opacity:.45}50%{opacity:1}}
.header-deck{
  position:relative;
  display:flex;align-items:center;gap:clamp(14px,2.5vw,34px);
  max-width:var(--shell);margin:0 auto;
  padding:15px var(--edge);
  transition:padding .3s ease;
}
.header-deck::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,var(--lime) 10%,rgba(198,255,61,.14) 48%,transparent 92%);
  opacity:.6;
}
.site-header.is-stuck .header-deck{padding-top:9px;padding-bottom:9px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:var(--white);margin-right:auto}
.brand-plate{
  display:inline-flex;align-items:center;justify-content:center;
  width:42px;height:42px;flex:none;
  background:var(--lime);color:#06170F;
  font-family:var(--font-mono);font-size:16px;font-weight:800;letter-spacing:-.02em;
  transform:skewX(-8deg);
  transition:background .2s ease,transform .3s ease;
}
.brand:hover .brand-plate{background:#D9FF74;transform:skewX(-8deg) translateY(-1px)}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.02em}
.brand-sub{font-family:var(--font-mono);font-size:9px;letter-spacing:.28em;color:var(--mist);margin-top:4px}
.nav-toggle{
  display:none;align-items:center;gap:9px;
  padding:10px 14px;border:1px solid var(--line);border-radius:2px;
  background:rgba(14,44,36,.5);color:var(--white);
  font-size:12px;font-weight:700;letter-spacing:.16em;cursor:pointer;
  transition:border-color .2s ease,color .2s ease;
}
.nav-toggle:hover{border-color:var(--lime);color:var(--lime)}
.nav-toggle-dot{
  width:9px;height:9px;background:var(--lime);display:block;flex:none;
  transform:skewX(-14deg);transition:background .2s ease,transform .25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle-dot{background:var(--alert);transform:skewX(-14deg) rotate(45deg)}
.nav-toggle-label{display:block}
.primary-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:clamp(10px,1.9vw,26px)}
.nav-tag{
  position:relative;display:inline-flex;align-items:baseline;gap:7px;
  padding:9px 2px;color:var(--white);text-decoration:none;white-space:nowrap;
  font-size:15px;font-weight:600;letter-spacing:.02em;
  transition:color .2s ease;
}
.nav-tag::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .28s ease;
}
.nav-tag:hover{color:var(--lime)}
.nav-tag:hover::after{transform:scaleX(1)}
.nav-tag[aria-current="page"]{color:var(--lime)}
.nav-tag[aria-current="page"]::after{transform:scaleX(1)}
.nav-tag-index{
  font-family:var(--font-mono);font-size:9.5px;letter-spacing:.12em;
  color:var(--mist);transition:color .2s ease;
}
.nav-tag[aria-current="page"] .nav-tag-index{color:var(--orange)}

/* ---------- footer ---------- */
.site-footer{
  position:relative;z-index:1;
  margin-top:clamp(56px,9vw,130px);
  background:
    radial-gradient(120% 90% at 88% 0%,rgba(255,122,24,.13),transparent 62%),
    linear-gradient(180deg,#0B1F1A 0%,#071A16 70%);
  border-top:1px solid var(--line);
  color:var(--mist);
}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(198,255,61,.55),rgba(255,122,24,.4),transparent);
}
.footer-shell{
  position:relative;z-index:1;
  max-width:var(--shell);margin:0 auto;
  padding:clamp(42px,6vw,80px) var(--edge) 0;
}
.footer-top{
  display:grid;grid-template-columns:minmax(240px,1fr) minmax(0,1.7fr);
  gap:clamp(28px,5vw,68px);
  padding-bottom:clamp(26px,4vw,48px);
  border-bottom:1px solid var(--line);
}
.footer-mark{
  display:inline-block;font-family:var(--font-mono);font-weight:800;
  font-size:clamp(34px,5vw,56px);line-height:1;letter-spacing:-.03em;
  color:var(--lime);transform:skewX(-6deg);
}
.footer-tagline{margin-top:14px;font-size:16px;font-weight:700;color:var(--white);letter-spacing:.02em}
.footer-desc{margin-top:8px;font-size:14px;line-height:1.8;color:var(--mist);max-width:26em}
.footer-cta{margin-top:22px}
.footer-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(18px,3vw,34px)}
.footer-col-title{
  display:flex;align-items:center;gap:8px;margin-bottom:14px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.2em;color:var(--mist);text-transform:uppercase;
}
.footer-col-title::before{content:"";width:8px;height:8px;background:var(--lime);transform:skewX(-12deg);flex:none}
.footer-col ul{display:grid;gap:9px}
.footer-link{
  display:inline-block;font-size:14px;color:#CFDDD6;text-decoration:none;
  transition:color .2s ease,padding-left .2s ease;
}
.footer-link:hover{color:var(--lime);padding-left:4px}
.footer-link--alert{color:#FF8A97}
.footer-link--alert:hover{color:var(--alert)}
.footer-contact{padding:clamp(24px,4vw,38px) 0;border-bottom:1px solid var(--line)}
.contact-list{display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.contact-line{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;font-size:14px}
.contact-key{
  flex:none;min-width:64px;font-family:var(--font-mono);
  font-size:11px;letter-spacing:.18em;color:var(--mist);
}
.contact-val{color:var(--white)}
.footer-note{
  margin-top:16px;padding-left:14px;max-width:62em;
  border-left:2px solid rgba(198,255,61,.35);
  font-size:12.5px;line-height:1.9;color:var(--mist);
}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 24px;padding:22px 0 30px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.footer-copy,.footer-icp{margin:0}
.footer-coord{
  display:none;position:absolute;right:10px;top:50%;transform:translateY(-50%);
  writing-mode:vertical-rl;font-family:var(--font-mono);
  font-size:10px;letter-spacing:.3em;color:rgba(127,179,164,.35);
  pointer-events:none;
}
.to-top{
  position:fixed;right:clamp(14px,2.5vw,30px);bottom:clamp(14px,2.5vw,30px);z-index:80;
  width:52px;height:52px;display:grid;place-items:center;
  background:rgba(14,44,36,.9);border:1px solid var(--line);border-radius:50%;
  color:var(--lime);cursor:pointer;
  opacity:0;visibility:hidden;transform:translateY(14px);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
  transition:opacity .3s ease,transform .3s ease,visibility .3s,border-color .2s ease,background .2s ease;
}
.to-top.is-on{opacity:1;visibility:visible;transform:none}
.to-top:hover{border-color:var(--lime);background:rgba(198,255,61,.14)}
.to-top-arrow{font-size:18px;line-height:1}

/* ---------- shared blocks ---------- */
.section{padding:clamp(40px,6vw,88px) 0}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;
  gap:14px 26px;margin-bottom:clamp(20px,3vw,36px);
}
.section-title{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(24px,3.4vw,40px);line-height:1.1;letter-spacing:-.015em;
  transform:skewX(-4deg);transform-origin:left bottom;
}
.section-note{
  margin-left:auto;font-family:var(--font-mono);font-size:12px;
  letter-spacing:.1em;color:var(--mist);
}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-family:var(--font-mono);font-size:11px;font-weight:700;
  letter-spacing:.24em;text-transform:uppercase;color:var(--lime);
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--lime);flex:none}
.display{
  font-family:var(--font-display);font-weight:800;
  font-size:clamp(38px,7vw,96px);line-height:.94;letter-spacing:-.02em;
  transform:skewX(-4deg);transform-origin:left bottom;
}
.lead{font-size:clamp(16px,1.4vw,19px);line-height:1.85;color:#D7E4DD;max-width:38em}
.coord{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.18em;
  color:var(--mist);writing-mode:vertical-rl;
}
.divider{
  height:1px;border:0;margin:clamp(26px,4vw,50px) 0;
  background:linear-gradient(90deg,rgba(198,255,61,.4),rgba(42,59,62,.9) 42%,transparent);
}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--mist);
}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li + li::before{content:"/";color:var(--line)}
.breadcrumb a{color:var(--mist);text-decoration:none;transition:color .2s ease}
.breadcrumb a:hover{color:var(--lime)}
.breadcrumb [aria-current="page"]{color:var(--white)}
.prose{max-width:38em;font-size:17px;line-height:1.85;color:#DCE8E1}
.prose > * + *{margin-top:1.05em}
.prose h2,.prose h3{font-family:var(--font-display);color:var(--white);line-height:1.3;letter-spacing:-.01em}
.prose h2{font-size:clamp(21px,2.4vw,28px);margin-top:1.7em}
.prose h3{font-size:clamp(18px,2vw,22px);margin-top:1.4em}
.prose a{color:var(--lime);text-decoration:underline;text-underline-offset:3px}
.prose ul{list-style:disc;padding-left:1.3em}
.prose ol{list-style:decimal;padding-left:1.4em}
.prose li + li{margin-top:.4em}
.prose strong{color:var(--white);font-weight:700}
.grid{display:grid;gap:clamp(16px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid--3{grid-template-columns:repeat(3,minmax(0,1fr))}
.card{
  position:relative;overflow:hidden;
  background:var(--bg-pitch);
  border:1px solid var(--line);border-radius:var(--radius);
  padding:clamp(18px,2.4vw,28px);
  transition:border-color .25s ease,background .25s ease;
}
.card::after{
  content:"";position:absolute;left:0;top:0;height:2px;width:100%;
  background:var(--lime);transform:scaleX(0);transform-origin:0 50%;
  transition:transform .5s ease;
}
.card:hover{border-color:#3C5A5C;background:#103028}
.card:hover::after{transform:scaleX(1)}
.media-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16/10;
  background:linear-gradient(150deg,var(--bg-pitch),var(--bg-carbon));
  border:1px solid var(--line);border-radius:var(--radius);
}
.media-frame img{display:block;width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:
    repeating-linear-gradient(0deg,rgba(7,26,22,.32) 0 1px,transparent 1px 3px),
    radial-gradient(120% 100% at 50% 0%,transparent 42%,rgba(7,26,22,.6));
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:13px 26px;border:1px solid transparent;border-radius:var(--radius);
  font-family:var(--font-body);font-size:15px;font-weight:700;letter-spacing:.04em;
  text-decoration:none;cursor:pointer;
  transition:transform .2s ease,background-color .2s ease,color .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--orange);color:#12130A;box-shadow:0 8px 24px rgba(255,122,24,.22)}
.btn--primary:hover{background:#FF9138}
.btn--lime{background:var(--lime);color:#0A2013}
.btn--lime:hover{background:#D9FF74}
.btn--ghost{border-color:var(--line);color:var(--white);background:rgba(14,44,36,.42)}
.btn--ghost:hover{border-color:var(--lime);color:var(--lime)}
.btn--alert{border-color:rgba(255,59,78,.6);color:#FF8A97;background:transparent}
.btn--alert:hover{background:var(--alert);border-color:var(--alert);color:#fff}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border:1px solid var(--line);border-radius:999px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;color:var(--mist);
}
.chip--live{border-color:rgba(198,255,61,.5);color:var(--lime);background:var(--lime-veil)}
.chip--alert{border-color:rgba(255,59,78,.55);color:var(--alert)}
.index-rail{
  position:fixed;left:clamp(10px,2vw,24px);top:50%;transform:translateY(-50%);
  z-index:45;display:none;flex-direction:column;gap:14px;
}
.index-rail a{
  display:flex;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:10px;letter-spacing:.16em;
  color:var(--mist);text-decoration:none;transition:color .2s ease;
}
.index-rail a::before{content:"";width:14px;height:1px;background:currentColor;transition:width .25s ease,background .25s ease}
.index-rail li.is-active a{color:var(--lime)}
.index-rail li.is-active a::before{width:26px;background:var(--lime)}
[data-js="on"] [data-reveal]{opacity:0;transform:translateY(18px);transition:opacity .55s ease,transform .55s ease}
[data-js="on"] [data-reveal].is-visible{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media (min-width:1200px){
  .index-rail{display:flex}
}
@media (min-width:1400px){
  .footer-coord{display:block}
}
@media (max-width:1080px){
  .rail-status{display:none}
}
@media (max-width:980px){
  .nav-toggle{display:inline-flex}
  .primary-nav{
    display:none;
    position:absolute;top:100%;left:0;right:0;
    margin-left:0;
    padding:6px var(--edge) 18px;
    background:linear-gradient(180deg,#0B241E 0%,#071A16 100%);
    border-bottom:1px solid var(--line);
    box-shadow:0 26px 44px rgba(0,0,0,.55);
    max-height:calc(100vh - 130px);overflow-y:auto;
  }
  .primary-nav[data-open="true"]{display:block}
  .nav-list{flex-direction:column;align-items:stretch;gap:0}
  .nav-tag{
    width:100%;justify-content:flex-start;gap:12px;
    padding:15px 4px;font-size:17px;
    border-bottom:1px dashed rgba(42,59,62,.85);
  }
  .nav-tag::after{display:none}
  .nav-tag[aria-current="page"]{
    color:var(--lime);
    background:linear-gradient(90deg,var(--lime-veil),transparent 72%);
  }
  .footer-top{grid-template-columns:1fr}
}
@media (max-width:760px){
  body{font-size:16.5px}
  .rail-line{display:none}
  .header-rail{padding-top:8px;padding-bottom:8px}
  .brand-sub{display:none}
  .brand-plate{width:38px;height:38px;font-size:14px}
  .brand-name{font-size:18px}
  .footer-cols{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .footer-base{justify-content:flex-start}
}
@media (max-width:520px){
  .grid--2,.grid--3{grid-template-columns:1fr}
  .footer-cols{grid-template-columns:1fr}
  .btn{width:100%}
  .footer-cta{width:100%}
  .contact-line{flex-direction:column;gap:2px}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  [data-js="on"] [data-reveal]{opacity:1;transform:none}
  .btn:hover,.card:hover{transform:none}
}