/* ===== reset ===== */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd,dt{margin:0;padding:0}
ul,ol{list-style:none}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0}
img{display:block;max-width:100%}
details summary{list-style:none}
details summary::-webkit-details-marker{display:none}

/* ===== tokens ===== */
:root{
  --ink-0:#04050D;
  --ink-1:#0A1030;
  --ink-2:#141C4A;
  --galaxy:#4B3FE4;
  --nebula:#7C6BFF;
  --signal:#FF6A2B;
  --orbit:#34E0C8;
  --silver:#C9D3E8;
  --white:#EEF1F8;
  --grid:#6B7794;
  --line:rgba(107,119,148,.30);
  --line-soft:rgba(107,119,148,.16);
  --glow:0 0 0 1px rgba(124,107,255,.35), 0 20px 52px -30px rgba(75,63,228,.9);
  --shell-w:1240px;
  --pad:clamp(18px,4vw,44px);
  --radius:18px;
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-display:"Noto Sans SC","Source Han Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono:"JetBrains Mono","IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}

/* ===== base ===== */
body{
  min-height:100vh;
  position:relative;
  color:var(--silver);
  font-family:var(--font-display);
  font-size:17px;
  line-height:1.95;
  letter-spacing:.005em;
  background:
    radial-gradient(1200px 700px at 84% -10%, rgba(124,107,255,.24), transparent 62%),
    radial-gradient(900px 620px at 4% 14%, rgba(52,224,200,.10), transparent 60%),
    radial-gradient(1000px 820px at 52% 106%, rgba(255,106,43,.10), transparent 66%),
    linear-gradient(180deg,var(--ink-0) 0%,var(--ink-1) 46%,var(--ink-0) 100%);
  background-attachment:fixed;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(107,119,148,.13) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(107,119,148,.10) 1px, transparent 1px);
  background-size:88px 88px, 88px 88px;
  -webkit-mask-image:radial-gradient(120% 88% at 50% 0%, #000 22%, transparent 80%);
  mask-image:radial-gradient(120% 88% at 50% 0%, #000 22%, transparent 80%);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.55;
  background-image:
    radial-gradient(1.4px 1.4px at 18% 24%, rgba(238,241,248,.75), transparent 60%),
    radial-gradient(1.2px 1.2px at 72% 12%, rgba(124,107,255,.8), transparent 60%),
    radial-gradient(1.3px 1.3px at 44% 68%, rgba(52,224,200,.7), transparent 60%),
    radial-gradient(1.1px 1.1px at 88% 76%, rgba(238,241,248,.6), transparent 60%);
  background-size:360px 360px, 420px 420px, 300px 300px, 480px 480px;
}
main{position:relative;z-index:1;display:block}
h1,h2,h3,h4{line-height:1.3;color:var(--white);letter-spacing:-.015em}
:focus-visible{outline:2px solid var(--orbit);outline-offset:3px;border-radius:4px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

/* ===== layout ===== */
.shell{width:min(calc(100% - var(--pad) * 2), var(--shell-w));margin-inline:auto}
.section{position:relative;padding-block:clamp(36px,6vw,84px)}
.section--band{
  background:linear-gradient(90deg, rgba(20,28,74,.66), rgba(10,16,48,.26));
  border-top:1px solid var(--line-soft);
  border-bottom:1px solid var(--line-soft);
}
.blueprint-grid{display:grid;grid-template-columns:repeat(12,minmax(0,1fr));gap:clamp(14px,1.6vw,24px)}
.axis-rail{grid-column:1 / span 3}
.content-main{grid-column:4 / -1;min-width:0}
.divider{height:1px;border:0;margin-block:clamp(26px,4.5vw,52px);background:linear-gradient(90deg,transparent,var(--line),transparent)}

/* ===== type helpers ===== */
.section-label{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--font-mono);font-size:12px;line-height:1.4;
  letter-spacing:.08em;text-transform:uppercase;color:var(--orbit);
}
.section-label::before{content:"";width:24px;height:1px;background:linear-gradient(90deg,var(--orbit),transparent)}
.page-title{font-size:clamp(30px,5.2vw,58px);line-height:1.14;font-weight:800;letter-spacing:-.02em;color:var(--white)}
.lede{max-width:62ch;margin-top:18px;font-size:clamp(15px,1.5vw,18px);line-height:1.95;color:var(--silver)}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em}

/* ===== buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 18px;border-radius:999px;border:1px solid transparent;
  font-size:13px;font-weight:600;line-height:1.4;cursor:pointer;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),border-color .24s var(--ease),background-color .24s var(--ease),color .24s var(--ease);
}
.btn--signal{background:linear-gradient(135deg,var(--signal),#ff8f52);color:#180703;box-shadow:0 12px 28px -16px rgba(255,106,43,.95)}
.btn--signal:hover{transform:translateY(-1px);box-shadow:0 16px 34px -14px rgba(255,106,43,1)}
.btn--ghost{border-color:var(--line);background:rgba(20,28,74,.42);color:var(--silver)}
.btn--ghost:hover{border-color:var(--nebula);color:var(--white);box-shadow:var(--glow)}
.btn--quiet{border-color:transparent;background:rgba(124,107,255,.14);color:var(--silver)}
.btn--quiet:hover{background:rgba(124,107,255,.26);color:var(--white)}

/* ===== tags ===== */
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:6px;
  border:1px solid var(--line);background:rgba(20,28,74,.5);color:var(--silver);
  font-family:var(--font-mono);font-size:11px;line-height:1.6;letter-spacing:.08em;text-transform:uppercase;
}
.tag--orbit{border-color:rgba(52,224,200,.5);background:rgba(52,224,200,.09);color:var(--orbit)}
.tag--signal{border-color:rgba(255,106,43,.5);background:rgba(255,106,43,.10);color:var(--signal)}

/* ===== panel ===== */
.panel{
  position:relative;padding:clamp(18px,3vw,30px);border-radius:var(--radius);
  background:linear-gradient(158deg, rgba(20,28,74,.72), rgba(10,16,48,.58));
  box-shadow:0 34px 64px -48px rgba(0,0,0,.95);
  transition:box-shadow .24s var(--ease),transform .24s var(--ease);
}
.panel::before{
  content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;pointer-events:none;
  background:linear-gradient(140deg, rgba(124,107,255,.78), rgba(52,224,200,.24) 48%, rgba(255,106,43,.5));
  -webkit-mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask:linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;
  opacity:.85;transition:opacity .24s var(--ease);
}
.panel--glow:hover{box-shadow:0 0 0 1px rgba(255,106,43,.22), 0 34px 74px -46px rgba(255,106,43,.6)}
.panel--glow:hover::before{opacity:1;background:linear-gradient(140deg, rgba(255,106,43,.8), rgba(124,107,255,.5) 55%, rgba(75,63,228,.7))}

/* ===== data card ===== */
.data-card{
  position:relative;padding:22px 24px;border-radius:var(--radius);
  border:1px solid var(--line);
  background:linear-gradient(150deg, rgba(20,28,74,.68), rgba(4,5,13,.52));
}
.data-card__value{display:block;font-family:var(--font-mono);font-size:clamp(32px,5.6vw,62px);line-height:1;letter-spacing:-.03em;color:var(--white)}
.data-card__unit{margin-left:6px;font-size:.34em;letter-spacing:.06em;color:var(--orbit)}
.data-card__label{margin-top:12px;font-size:13px;line-height:1.7;color:var(--grid)}
.data-card--signal{border-color:rgba(255,106,43,.45);box-shadow:0 0 0 1px rgba(255,106,43,.14), 0 30px 64px -44px rgba(255,106,43,.9)}
.data-card--signal .data-card__value{color:var(--signal)}

/* ===== status panel ===== */
.status-panel{
  padding:16px 18px;border-radius:14px;border:1px solid var(--line);
  background:rgba(4,5,13,.6);font-family:var(--font-mono);font-size:12px;line-height:1.8;
}
.status-panel__row{display:flex;justify-content:space-between;gap:12px;padding:7px 0;border-bottom:1px dashed var(--line-soft)}
.status-panel__row:last-child{border-bottom:0}
.status-panel__key{color:var(--grid);letter-spacing:.06em;text-transform:uppercase}
.status-panel__val{color:var(--orbit)}
.status-panel__val--signal{color:var(--signal)}

/* ===== meter ===== */
.meter{height:6px;border-radius:999px;background:rgba(107,119,148,.2);overflow:hidden}
.meter__fill{display:block;height:100%;border-radius:inherit;background:linear-gradient(90deg,var(--galaxy),var(--nebula),var(--orbit))}

/* ===== breadcrumb ===== */
.breadcrumb{padding-block:18px;font-family:var(--font-mono);font-size:12px;letter-spacing:.06em;color:var(--grid)}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
.breadcrumb li{display:inline-flex;align-items:center;gap:8px}
.breadcrumb li::after{content:"/";color:var(--line)}
.breadcrumb li:last-child::after{content:""}
.breadcrumb a{color:var(--silver)}
.breadcrumb a:hover{color:var(--white)}
.breadcrumb [aria-current="page"]{color:var(--orbit)}

/* ===== prose ===== */
.prose{max-width:72ch;font-size:17px;line-height:2}
.prose > * + *{margin-top:1.2em}
.prose h2{font-size:clamp(22px,2.8vw,28px);color:var(--white)}
.prose h3{font-size:20px;color:var(--white)}
.prose a{color:var(--nebula);text-decoration:underline;text-decoration-color:rgba(124,107,255,.5);text-underline-offset:3px}
.prose a:hover{color:var(--white);text-decoration-color:var(--signal)}
.prose strong{color:var(--white)}
.prose ul{padding-left:1.2em}
.prose ul li{position:relative}
.prose ul li::before{content:"";position:absolute;left:-1em;top:.85em;width:5px;height:5px;border-radius:50%;background:var(--orbit)}
.prose ol{list-style:decimal;padding-left:1.4em}
.prose blockquote{padding-left:18px;border-left:2px solid var(--nebula);color:var(--grid)}

/* ===== fold ===== */
.fold{border:1px solid var(--line);border-radius:14px;background:rgba(10,16,48,.55);overflow:hidden}
.fold + .fold{margin-top:10px}
.fold__summary{
  display:flex;align-items:center;gap:14px;padding:16px 20px;cursor:pointer;
  font-size:16px;font-weight:600;color:var(--white);
}
.fold__summary::after{
  content:"";margin-left:auto;width:9px;height:9px;flex:0 0 auto;
  border-right:1.6px solid var(--orbit);border-bottom:1.6px solid var(--orbit);
  transform:rotate(45deg);transition:transform .24s var(--ease);
}
.fold[open] .fold__summary::after{transform:rotate(-135deg)}
.fold__index{font-family:var(--font-mono);font-size:12px;color:var(--grid)}
.fold__body{padding:16px 20px 22px;border-top:1px solid var(--line-soft);font-size:15px;line-height:1.9}

/* ===== media frame ===== */
.media-frame{
  position:relative;overflow:hidden;border-radius:var(--radius);
  border:1px solid var(--line);aspect-ratio:16 / 9;
  background:linear-gradient(150deg, rgba(20,28,74,.72), rgba(4,5,13,.88));
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, rgba(107,119,148,.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(107,119,148,.12) 1px, transparent 1px);
  background-size:48px 48px, 48px 48px;opacity:.75;
}
.media-frame--wide{aspect-ratio:21 / 9}
.media-frame--tall{aspect-ratio:3 / 4}
.media-frame--square{aspect-ratio:1 / 1}
.media-frame__caption{
  position:absolute;left:0;right:0;bottom:0;z-index:1;padding:14px 16px;
  font-family:var(--font-mono);font-size:11px;letter-spacing:.06em;color:var(--silver);
  background:linear-gradient(0deg, rgba(4,5,13,.92), transparent);
}

/* ===== reveal ===== */
.reveal{
  opacity:0;transform:translateY(16px);
  transition:opacity .6s var(--ease),transform .6s var(--ease);
  transition-delay:var(--reveal-delay,0ms);
}
.reveal--in{opacity:1;transform:none}

/* ===== header ===== */
.skip-link{
  position:absolute;left:var(--pad);top:-120px;z-index:120;
  padding:10px 18px;border-radius:999px;background:var(--signal);color:#180703;
  font-size:14px;font-weight:700;transition:top .2s var(--ease);
}
.skip-link:focus{top:12px}
.site-header{
  position:sticky;top:0;z-index:60;
  background:linear-gradient(180deg, rgba(4,5,13,.97), rgba(10,16,48,.9));
  -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.header-rail{
  font-size:12px;line-height:1.6;color:var(--grid);
  background:linear-gradient(90deg, rgba(75,63,228,.32), rgba(10,16,48,.36) 48%, rgba(255,106,43,.18));
  border-bottom:1px solid var(--line-soft);
}
.rail-inner{display:flex;flex-wrap:wrap;align-items:center;gap:clamp(12px,2vw,26px);padding-block:8px}
.rail-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-mono);letter-spacing:.02em;color:var(--silver);white-space:nowrap}
.rail-brand__name{color:var(--white);font-weight:700}
.rail-brand__dot{width:6px;height:6px;border-radius:50%;background:var(--orbit);box-shadow:0 0 0 4px rgba(52,224,200,.16)}
.rail-brand__line{color:var(--grid)}
.rail-note{color:var(--grid)}
.rail-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.rail-actions .btn{padding:6px 13px;font-size:12px}

.header-bar{position:relative}
.bar-inner{display:flex;align-items:center;gap:clamp(12px,2vw,28px);min-height:70px;padding-block:10px}

.brand{display:inline-flex;align-items:center;gap:12px;flex:0 0 auto}
.brand__glyph{position:relative;width:36px;height:36px;border-radius:50%;border:1.5px solid rgba(124,107,255,.65);background:radial-gradient(circle at 50% 110%, rgba(52,224,200,.28), transparent 70%)}
.brand__glyph::before{content:"";position:absolute;inset:7px;border-radius:50%;border:1px solid rgba(255,106,43,.55)}
.brand__glyph::after{content:"";position:absolute;top:50%;left:50%;width:8px;height:8px;margin:-4px 0 0 -4px;border-radius:50%;background:var(--orbit);box-shadow:0 0 12px 2px rgba(52,224,200,.8)}
.brand__text{display:flex;flex-direction:column;line-height:1.25}
.brand__name{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--white)}
.brand__sub{font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--grid)}

.nav-toggle{
  display:none;align-items:center;gap:9px;margin-left:auto;
  padding:9px 14px;border-radius:12px;border:1px solid var(--line);
  background:rgba(20,28,74,.5);color:var(--silver);
  font-size:12px;letter-spacing:.1em;text-transform:uppercase;
  transition:border-color .24s var(--ease),color .24s var(--ease),background-color .24s var(--ease);
}
.nav-toggle__bars{position:relative;width:18px;height:12px}
.nav-toggle__bars::before,.nav-toggle__bars::after{content:"";position:absolute;left:0;width:18px;height:1.6px;background:currentColor;transition:transform .24s var(--ease)}
.nav-toggle__bars::before{top:1px}
.nav-toggle__bars::after{bottom:1px}
.nav-toggle[aria-expanded="true"]{border-color:var(--nebula);color:var(--white);background:rgba(75,63,228,.24)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before{transform:translateY(4.5px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after{transform:translateY(-4.5px) rotate(-45deg)}
.nav-toggle__label{white-space:nowrap}

.site-nav{margin-left:auto}
.nav-list{display:flex;align-items:center;gap:2px}
.nav-link{
  position:relative;display:inline-block;padding:8px 14px;border-radius:999px;
  font-size:14px;font-weight:500;line-height:1.6;color:var(--silver);
  transition:color .24s var(--ease),background-color .24s var(--ease),box-shadow .24s var(--ease);
}
.nav-link:hover{color:var(--white);background:rgba(124,107,255,.16)}
.nav-link[aria-current="page"]{
  color:var(--white);
  background:linear-gradient(135deg, rgba(75,63,228,.6), rgba(124,107,255,.24));
  box-shadow:inset 0 0 0 1px rgba(124,107,255,.55);
}
.nav-link[aria-current="page"]::after{
  content:"";position:absolute;left:50%;bottom:2px;width:5px;height:5px;margin-left:-2.5px;
  border-radius:50%;background:var(--signal);box-shadow:0 0 10px 1px rgba(255,106,43,.9);
}
.scroll-meter{height:2px;background:rgba(107,119,148,.18);overflow:hidden}
.scroll-meter__bar{
  display:block;height:100%;width:100%;transform:scaleX(0);transform-origin:0 50%;
  background:linear-gradient(90deg,var(--galaxy),var(--nebula) 46%,var(--orbit) 74%,var(--signal));
}

/* ===== footer ===== */
.site-footer{
  position:relative;z-index:1;margin-top:clamp(56px,9vw,120px);
  border-top:1px solid var(--line);
  background:linear-gradient(180deg, rgba(10,16,48,.9), rgba(4,5,13,.98));
}
.footer-shell{padding-block:clamp(34px,5vw,64px) 22px}
.footer-index{display:grid;grid-template-columns:minmax(210px,1.3fr) minmax(0,2fr) minmax(240px,1.2fr);gap:clamp(24px,3.4vw,52px)}
.footer-brand__name{font-size:20px;font-weight:800;letter-spacing:-.02em;color:var(--white);line-height:1.4}
.footer-brand__line{margin-top:6px;font-family:var(--font-mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--orbit)}
.footer-brand__note{margin-top:14px;font-size:13px;line-height:1.85;color:var(--grid)}
.footer-columns{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(16px,2vw,28px)}
.footer-col__title{display:flex;align-items:center;gap:8px;font-family:var(--font-mono);font-size:11px;font-weight:600;line-height:1.6;letter-spacing:.08em;text-transform:uppercase;color:var(--orbit)}
.footer-col__title::before{content:"";width:12px;height:1px;background:var(--orbit);flex:0 0 auto}
.footer-links{margin-top:16px}
.footer-links li + li{margin-top:8px}
.footer-links a{font-size:14px;line-height:1.8;color:var(--silver);border-bottom:1px solid transparent;transition:color .24s var(--ease),border-color .24s var(--ease)}
.footer-links a:hover{color:var(--white);border-bottom-color:var(--nebula)}
.footer-contact{margin-top:24px}
.footer-contact .footer-col__title{color:var(--grid)}
.contact-row{display:flex;gap:10px;margin-top:10px;font-size:13px;line-height:1.8}
.contact-row__key{flex:0 0 44px;font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--grid);padding-top:2px}
.contact-row__val{color:var(--silver);word-break:break-word}
.footer-contact__note{margin-top:14px;font-size:12px;line-height:1.8;color:var(--grid)}
.footer-base{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px 22px;
  margin-top:clamp(26px,4vw,46px);padding-top:18px;border-top:1px solid var(--line-soft);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.04em;color:var(--grid);
}
.footer-base__brand{color:var(--silver)}
.footer-base__meta{color:var(--grid)}
.footer-base__icp{color:var(--grid)}

/* ===== responsive ===== */
@media (max-width:1180px){
  .rail-note{display:none}
}
@media (min-width:1001px) and (max-width:1180px){
  .nav-list{overflow-x:auto;scrollbar-width:none;-ms-overflow-style:none}
  .nav-list::-webkit-scrollbar{display:none}
  .nav-link{white-space:nowrap}
}
@media (max-width:1000px){
  .nav-toggle{display:inline-flex}
  .site-nav{
    position:absolute;top:100%;left:0;right:0;margin-left:0;
    background:linear-gradient(180deg, rgba(10,16,48,.99), rgba(4,5,13,.99));
    border-bottom:1px solid var(--line);
    box-shadow:0 34px 64px -34px rgba(0,0,0,.95);
    max-height:0;overflow:hidden;visibility:hidden;
    transition:max-height .34s var(--ease),visibility .34s var(--ease);
  }
  .site-nav[data-open]{max-height:min(74vh,540px);overflow-y:auto;visibility:visible}
  .nav-list{flex-direction:column;align-items:stretch;gap:2px;padding:12px var(--pad) 20px}
  .nav-link{display:block;padding:13px 14px;border-radius:12px;font-size:15px}
  .nav-link[aria-current="page"]::after{left:auto;right:16px;bottom:50%;margin:0 -2.5px -2.5px 0}
  .footer-index{grid-template-columns:minmax(0,1fr) minmax(0,1.4fr)}
  .footer-brand{grid-column:1 / -1}
  .blueprint-grid .axis-rail,.blueprint-grid .content-main{grid-column:1 / -1}
}
@media (max-width:860px){
  .rail-actions .btn--ghost{display:none}
}
@media (max-width:640px){
  body{font-size:16px}
  .footer-index{grid-template-columns:minmax(0,1fr)}
  .footer-columns{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
  .bar-inner{min-height:62px}
  .brand__sub{display:none}
  .footer-base{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ===== reduced motion ===== */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;animation-iteration-count:1 !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none;transition:opacity .18s linear !important;transition-delay:0ms !important}
  .btn:hover{transform:none}
  .panel--glow:hover{box-shadow:0 34px 64px -48px rgba(0,0,0,.95)}
  .panel::before{opacity:.85}
}