*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,p,ul,ol,li,figure,blockquote,dl,dd{margin:0;padding:0}
ul,ol{list-style:none}
img,svg{max-width:100%;display:block}
a{color:inherit}
button,input,select,textarea{font:inherit;color:inherit}
[hidden]{display:none!important}

:root{
  --ink:#0B0B0F;
  --panel:#14141C;
  --raise:#1E1E2A;
  --purple:#6A0DAD;
  --purple-hi:#A64DFF;
  --cyan:#00E5FF;
  --cyan-soft:#7CF7FF;
  --orange:#FF7A00;
  --orange-soft:#FFC46B;
  --green:#2EE6A8;
  --text:#F2F0FF;
  --muted:#A6A3BE;
  --line:rgba(166,163,190,.20);
  --line-cyan:rgba(0,229,255,.32);
  --rail:80px;
  --bar:58px;
  --foot:64px;
  --r-s:4px;
  --r-m:18px;
  --r-l:28px;
  --g:8px;
  --ease:cubic-bezier(.22,.61,.36,1);
  --font-head:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-head);
  --font-mono:"JetBrains Mono","Roboto Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  --band-line:1px solid var(--line);
}

body{
  background:var(--ink);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.8;
  min-height:100vh;
  padding-left:var(--rail);
  overflow-x:hidden;
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background:
    radial-gradient(620px 420px at 10% 6%,rgba(106,13,173,.24),transparent 70%),
    radial-gradient(560px 520px at 92% 94%,rgba(0,229,255,.10),transparent 72%);
}

h1,h2,h3,h4{font-family:var(--font-head);font-weight:900;letter-spacing:.01em;line-height:1.28;text-shadow:0 0 12px rgba(106,13,173,.42),0 0 5px rgba(0,229,255,.26)}
h1{font-size:40px}
h2{font-size:32px}
h3{font-size:20px}
h4{font-size:18px}
p{margin-bottom:1em}
strong{color:var(--cyan-soft);font-weight:700}
::selection{background:rgba(0,229,255,.28);color:#fff}

:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:2px;border-radius:2px}
a:focus-visible{outline:2px solid var(--cyan-soft);outline-offset:2px}

.mono,.idx{font-family:var(--font-mono);font-size:13px;font-weight:500;letter-spacing:.06em}

.skip-link{
  position:fixed;
  left:calc(var(--rail) + 8px);
  top:-72px;
  z-index:99;
  background:var(--cyan);
  color:#06131a;
  font-weight:700;
  padding:10px 18px;
  border-radius:var(--r-s);
  text-decoration:none;
  transition:top .18s ease;
}
.skip-link:focus{top:8px}

/* ============ header ============ */
.site-header{
  position:fixed;
  inset:0;
  z-index:70;
  display:flex;
  align-items:flex-start;
  pointer-events:none;
}
.site-header>*{pointer-events:auto}

.rail{
  width:var(--rail);
  height:100%;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
  padding:20px 0 24px;
  background:linear-gradient(180deg,rgba(20,20,28,.97),rgba(11,11,15,.92));
  border-right:var(--band-line);
  backdrop-filter:blur(8px);
}
.rail__brand{
  display:block;
  writing-mode:vertical-rl;
  text-orientation:upright;
  text-decoration:none;
  color:var(--text);
  font-family:var(--font-head);
  font-weight:900;
  font-size:20px;
  letter-spacing:.16em;
  text-shadow:0 0 14px rgba(106,13,173,.7),0 0 6px rgba(0,229,255,.35);
}
.rail__brand-sub{
  display:block;
  margin-block-start:10px;
  font-family:var(--font-mono);
  font-size:10px;
  font-weight:500;
  letter-spacing:.24em;
  color:var(--muted);
  text-shadow:none;
}
.rail__bead{
  width:10px;
  height:10px;
  border-radius:50%;
  background:var(--purple-hi);
  box-shadow:0 0 0 4px rgba(166,77,255,.14),0 0 14px rgba(166,77,255,.85);
  animation:breathe 3.6s ease-in-out infinite;
}
.rail__dots{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:auto;
}
.dot{
  width:6px;
  height:6px;
  border-radius:50%;
  background:rgba(166,163,190,.35);
}
.dot--live{
  background:var(--cyan);
  box-shadow:0 0 10px rgba(0,229,255,.75);
  animation:breathe 3.6s ease-in-out infinite;
}
.rail__home{display:none}
.rail__home-link{
  display:inline-block;
  text-decoration:none;
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  background:linear-gradient(180deg,var(--cyan-soft),var(--cyan));
  padding:8px 14px;
  border-radius:var(--r-m);
  box-shadow:0 4px 0 rgba(0,120,140,.55);
}
@keyframes breathe{
  0%,100%{opacity:.35;transform:scale(.9)}
  50%{opacity:1;transform:scale(1)}
}

.topbar{
  position:relative;
  flex:1;
  height:var(--bar);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:0 22px;
  background:linear-gradient(180deg,rgba(11,11,15,.94),rgba(11,11,15,.55));
  border-bottom:var(--band-line);
  backdrop-filter:blur(10px);
  pointer-events:none;
}
.topbar>*{pointer-events:auto}
.topbar__marker{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:500;
  letter-spacing:.14em;
  color:var(--cyan);
  margin:0;
}
.scroll-progress{
  position:absolute;
  left:0;
  bottom:-1px;
  height:2px;
  width:100%;
  transform:scaleX(0);
  transform-origin:left center;
  background:linear-gradient(90deg,var(--purple-hi),var(--cyan));
  box-shadow:0 0 10px rgba(0,229,255,.55);
  pointer-events:none;
}

.nav__list{display:flex;align-items:center;gap:2px}
.nav__link{
  position:relative;
  display:inline-block;
  padding:8px 12px;
  border-radius:var(--r-s);
  text-decoration:none;
  font-size:15px;
  color:var(--text);
  transition:color .18s ease;
}
.nav__link::after{
  content:"";
  position:absolute;
  left:12px;
  right:12px;
  bottom:3px;
  height:2px;
  background:var(--cyan);
  transform:scaleX(0);
  transform-origin:left center;
  transition:transform .2s var(--ease);
}
.nav__link:hover{color:var(--cyan-soft)}
.nav__link:hover::after{transform:scaleX(1)}
.nav__link[aria-current="page"]{color:var(--cyan)}
.nav__link[aria-current="page"]::after{transform:scaleX(1);background:var(--purple-hi)}

.nav-toggle{
  display:none;
  align-items:center;
  gap:8px;
  background:var(--raise);
  border:1px solid var(--line-cyan);
  border-radius:var(--r-m);
  padding:8px 14px;
  cursor:pointer;
}
.nav-toggle__bars{
  position:relative;
  display:block;
  width:18px;
  height:2px;
  background:var(--cyan);
  border-radius:2px;
}
.nav-toggle__bars::before,
.nav-toggle__bars::after{
  content:"";
  position:absolute;
  left:0;
  width:18px;
  height:2px;
  background:var(--cyan);
  border-radius:2px;
}
.nav-toggle__bars::before{top:-6px}
.nav-toggle__bars::after{top:6px}
.nav-toggle__text{font-size:14px;font-weight:700;color:var(--cyan-soft)}
.site-header[data-open] .nav-toggle{border-color:var(--orange);}
.site-header[data-open] .nav-toggle__bars,
.site-header[data-open] .nav-toggle__bars::before,
.site-header[data-open] .nav-toggle__bars::after{background:var(--orange)}

.index-rail{
  position:absolute;
  right:0;
  top:50%;
  transform:translateY(-50%);
  display:none;
  padding:14px 8px;
  border-left:var(--band-line);
  border-radius:var(--r-m) 0 0 var(--r-m);
  background:rgba(11,11,15,.58);
  backdrop-filter:blur(6px);
}
.index-rail__list{display:flex;flex-direction:column;gap:10px;align-items:center}
.index-rail__link{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:4px;
  text-decoration:none;
  color:var(--muted);
  transition:color .18s ease;
}
.index-rail__num{font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;color:var(--cyan)}
.index-rail__label{
  writing-mode:vertical-rl;
  text-orientation:upright;
  font-size:13px;
  letter-spacing:.14em;
}
.index-rail__link:hover,
.index-rail__link[aria-current="page"]{color:var(--cyan-soft)}
.index-rail__link[aria-current="page"] .index-rail__num{color:var(--orange)}

/* ============ layout primitives ============ */
#main-content{
  position:relative;
  z-index:1;
  padding-top:calc(var(--bar) + 28px);
  scroll-margin-top:calc(var(--bar) + 12px);
}
.wrap{
  width:100%;
  max-width:1180px;
  margin:0 auto;
  padding:0 28px;
}
.section{padding-block:48px}
.section + .section{padding-top:64px}
.section__head{
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:12px;
  margin-bottom:22px;
}
.section__num{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:500;
  letter-spacing:.12em;
  color:var(--cyan);
}
.section__title{font-size:24px}
.section__note{font-size:14px;color:var(--muted);max-width:56ch}

.breadcrumb{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--muted);
  margin-bottom:20px;
}
.breadcrumb__sep{color:rgba(166,163,190,.5)}
.breadcrumb a{text-decoration:none;color:var(--cyan)}
.breadcrumb a:hover{color:var(--cyan-soft);text-decoration:underline}

.grid{
  display:grid;
  grid-template-columns:repeat(12,minmax(0,1fr));
  gap:24px;
}
.span-3{grid-column:span 3}
.span-4{grid-column:span 4}
.span-6{grid-column:span 6}
.span-8{grid-column:span 8}
.span-12{grid-column:span 12}

/* ============ atoms ============ */
.btn{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:11px 20px;
  border-radius:var(--r-m);
  border:1px solid var(--purple);
  background:linear-gradient(180deg,rgba(106,13,173,.32),rgba(20,20,28,.9));
  color:var(--text);
  font-weight:700;
  font-size:15px;
  text-decoration:none;
  cursor:pointer;
  transition:border-color .18s ease,transform .18s ease,color .18s ease,box-shadow .18s ease;
}
.btn:hover{border-color:var(--cyan);color:var(--cyan-soft);transform:translateY(-2px);box-shadow:0 8px 22px rgba(0,229,255,.14)}
.btn--neon{border-color:var(--cyan);color:var(--cyan-soft);background:linear-gradient(180deg,rgba(0,229,255,.14),rgba(20,20,28,.9))}
.btn--ghost{background:transparent;border-color:var(--line)}
.btn--warn{border-color:var(--orange);color:var(--orange-soft)}

.tag{
  display:inline-block;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.08em;
  padding:3px 10px;
  border-radius:999px;
  border:1px solid var(--line-cyan);
  color:var(--cyan);
  background:rgba(0,229,255,.07);
}
.tag--purple{border-color:rgba(166,77,255,.5);color:var(--purple-hi);background:rgba(106,13,173,.16)}
.tag--warn{border-color:rgba(255,122,0,.5);color:var(--orange-soft);background:rgba(255,122,0,.12)}
.tag--ok{border-color:rgba(46,230,168,.45);color:var(--green);background:rgba(46,230,168,.1)}

.pixel-divider{
  height:2px;
  border:0;
  margin:24px 0;
  background-image:repeating-linear-gradient(90deg,var(--line-cyan) 0 2px,transparent 2px 8px);
  opacity:.7;
}
.scanline{position:relative;overflow:hidden}
.scanline::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(124,247,255,.06) 0 1px,transparent 1px 4px);
  opacity:.4;
  animation:scan 12s linear infinite;
}
@keyframes scan{
  from{transform:translateY(0)}
  to{transform:translateY(4px)}
}

/* ============ cards & folders ============ */
.card{
  position:relative;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:20px;
  transition:border-color .18s ease,transform .18s ease;
}
.card:hover{border-color:var(--cyan);transform:translateY(-2px)}
.card--wide{border-radius:var(--r-l);padding:26px}
.card--std{border-radius:var(--r-m)}
.card--idx{border-radius:var(--r-s);padding:14px;background:var(--raise)}

.folder{position:relative;padding-top:26px;margin-bottom:24px}
.folder__tab{
  position:absolute;
  top:0;
  left:14px;
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:4px 14px;
  font-family:var(--font-mono);
  font-size:12px;
  font-weight:500;
  letter-spacing:.1em;
  color:#fff;
  background:var(--purple);
  border-radius:var(--r-s) var(--r-s) 0 0;
  clip-path:polygon(0 0,calc(100% - 10px) 0,100% 100%,0 100%);
}
.folder[data-open] .folder__tab{background:var(--orange);color:#1a0d00}

.rule-list{margin:0}
.rule-list__item{
  display:flex;
  gap:12px;
  padding:10px 0;
  border-bottom:1px dashed rgba(166,163,190,.16);
  font-size:15px;
}
.rule-list__item:last-child{border-bottom:0}
.rule-list__idx{font-family:var(--font-mono);font-size:13px;color:var(--cyan);flex:0 0 auto;padding-top:2px}

.data-list{margin:0}
.data-row{
  display:grid;
  grid-template-columns:88px 1fr auto;
  gap:14px;
  align-items:center;
  padding:12px 14px;
  border-radius:var(--r-s);
  font-size:15px;
}
.data-row:nth-child(odd){background:rgba(30,30,42,.6)}
.data-row__id{font-family:var(--font-mono);font-size:13px;color:var(--cyan)}
.data-row__val{font-family:var(--font-mono);color:var(--orange-soft);font-weight:500}

.stat{
  background:var(--raise);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  padding:14px 16px;
}
.stat__num{display:block;font-family:var(--font-mono);font-size:24px;font-weight:500;color:var(--cyan)}
.stat__label{display:block;font-size:13px;color:var(--muted)}

/* ============ media ============ */
.media-frame{
  position:relative;
  display:block;
  width:100%;
  aspect-ratio:16/9;
  overflow:hidden;
  border:1px solid var(--line);
  border-radius:var(--r-m);
  background:
    repeating-linear-gradient(135deg,rgba(30,30,42,.9) 0 10px,rgba(20,20,28,.9) 10px 20px);
}
.media-frame img{width:100%;height:100%;object-fit:cover}
.media-frame::after{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(124,247,255,.05) 0 1px,transparent 1px 4px);
}
.media-frame[data-media-label]::before{
  content:attr(data-media-label);
  position:absolute;
  left:12px;
  bottom:10px;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--muted);
}
.media-frame--wide{aspect-ratio:21/9}
.media-frame--tall{aspect-ratio:4/5}
.media-frame--square{aspect-ratio:1/1}
.media-fig{margin:0}
.media-fig__cap{
  margin-top:8px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--muted);
}

/* ============ fold ============ */
.fold{
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--r-m);
  overflow:hidden;
  transition:border-color .18s ease;
}
.fold + .fold{margin-top:8px}
.fold[data-open]{border-left:3px solid var(--orange);border-color:var(--line-cyan)}
.fold__head{
  display:flex;
  align-items:center;
  gap:12px;
  width:100%;
  padding:14px 18px;
  background:var(--raise);
  border:0;
  text-align:left;
  cursor:pointer;
  transition:background .18s ease,color .18s ease;
}
.fold__head:hover{background:#242434;color:var(--cyan-soft)}
.fold__idx{font-family:var(--font-mono);font-size:13px;color:var(--cyan);flex:0 0 auto}
.fold__title{flex:1;font-weight:700;font-size:16px}
.fold__sign{
  position:relative;
  width:14px;
  height:14px;
  flex:0 0 auto;
}
.fold__sign::before,
.fold__sign::after{
  content:"";
  position:absolute;
  background:var(--cyan);
  border-radius:2px;
  transition:transform .22s var(--ease),background .18s ease;
}
.fold__sign::before{left:0;top:6px;width:14px;height:2px}
.fold__sign::after{left:6px;top:0;width:2px;height:14px}
.fold[data-open] .fold__sign::after{transform:scaleY(0)}
.fold[data-open] .fold__sign::before{background:var(--orange-soft)}
.fold__panel{
  display:grid;
  grid-template-rows:0fr;
  transition:grid-template-rows 220ms var(--ease);
}
.fold[data-open] .fold__panel{grid-template-rows:1fr}
.fold__inner{overflow:hidden;min-height:0}
.fold__body{
  padding:16px 18px 20px;
  opacity:0;
  transition:opacity 140ms ease;
}
.fold[data-open] .fold__body{opacity:1;transition:opacity 200ms ease 120ms}

/* ============ filter ============ */
.filter-bar{
  display:flex;
  flex-wrap:wrap;
  align-items:center;
  gap:8px;
  margin-bottom:20px;
}
.filter-btn{
  font-family:var(--font-mono);
  font-size:13px;
  font-weight:500;
  letter-spacing:.06em;
  padding:7px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--panel);
  color:var(--muted);
  cursor:pointer;
  transition:border-color .18s ease,color .18s ease,background .18s ease;
}
.filter-btn:hover{border-color:var(--purple-hi);color:var(--purple-hi)}
.filter-btn[aria-pressed="true"]{
  border-color:var(--cyan);
  color:var(--cyan-soft);
  background:rgba(0,229,255,.1);
}
.filter-count{
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--muted);
  margin-left:auto;
}
.filter-empty{
  padding:22px;
  border:1px dashed var(--line);
  border-radius:var(--r-m);
  color:var(--muted);
  font-size:15px;
  text-align:center;
}

/* ============ reveal & anchors ============ */
.has-js [data-rise]{
  opacity:0;
  transform:translateY(10px);
  transition:opacity .5s var(--ease),transform .5s var(--ease);
}
.has-js [data-rise].is-in{opacity:1;transform:none}

[data-anchor]{cursor:pointer}
.anchor-hint{
  display:inline-block;
  margin-left:8px;
  font-family:var(--font-mono);
  font-size:12px;
  color:var(--green);
}

/* ============ footer ============ */
.site-footer{
  position:relative;
  z-index:1;
  margin-top:96px;
  padding:56px 0 44px;
  background:linear-gradient(180deg,#0d0d14,#0B0B0F);
  border-top:var(--band-line);
  overflow:hidden;
}
.site-footer::before{
  content:"";
  position:absolute;
  inset:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(180deg,rgba(124,247,255,.035) 0 1px,transparent 1px 5px);
}
.site-footer__inner{
  position:relative;
  max-width:1180px;
  margin:0 auto;
  padding:0 28px;
}
.band{padding:26px 0}
.band + .band{border-top:1px dashed rgba(166,163,190,.16)}
.band__head{
  display:flex;
  align-items:baseline;
  gap:12px;
  margin-bottom:16px;
}
.band__num{font-family:var(--font-mono);font-size:12px;letter-spacing:.12em;color:var(--cyan)}
.band__title{font-size:18px;font-weight:800}

.keys{
  display:grid;
  grid-template-columns:repeat(6,minmax(0,1fr));
  gap:10px;
}
.key{
  display:flex;
  flex-direction:column;
  gap:4px;
  padding:14px 12px;
  text-decoration:none;
  border:1px solid var(--line);
  border-bottom:3px solid rgba(106,13,173,.75);
  border-radius:var(--r-m);
  background:linear-gradient(180deg,var(--raise),var(--panel));
  transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease,color .18s ease;
}
.key:hover{
  transform:translateY(-2px);
  border-color:var(--cyan);
  border-bottom-color:var(--cyan);
  color:var(--cyan-soft);
  box-shadow:0 10px 22px rgba(0,229,255,.14);
}
.key__num{font-family:var(--font-mono);font-size:12px;color:var(--cyan)}
.key__label{font-size:15px;font-weight:700}

.catgrid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(158px,1fr));
  gap:2px 18px;
}
.cat{
  display:flex;
  align-items:baseline;
  gap:8px;
  padding:7px 0;
  border-bottom:1px dashed rgba(166,163,190,.14);
}
.cat__num{font-family:var(--font-mono);font-size:12px;color:var(--purple-hi)}
.cat__name{font-size:14px;color:var(--text)}

.legal-list{
  display:flex;
  flex-wrap:wrap;
  gap:8px 18px;
  margin-bottom:12px;
}
.legal-link{
  font-size:15px;
  font-weight:700;
  text-decoration:none;
  color:var(--text);
  border-bottom:2px solid rgba(166,77,255,.6);
  padding-bottom:2px;
  transition:color .18s ease,border-color .18s ease;
}
.legal-link:hover{color:var(--cyan-soft);border-color:var(--cyan)}
.footer-meta{font-size:14px;color:var(--muted);margin-bottom:4px}
.footer-meta--dim{color:rgba(166,163,190,.75)}
.footer-copy{
  margin-top:12px;
  font-family:var(--font-mono);
  font-size:13px;
  color:var(--muted);
}
.footer-copy span{color:var(--cyan)}

.contact-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:10px 24px;
}
.contact-line{
  display:flex;
  align-items:baseline;
  gap:10px;
  font-size:15px;
  margin:0;
  padding:10px 12px;
  border-left:3px solid var(--purple);
  background:rgba(20,20,28,.7);
  border-radius:0 var(--r-s) var(--r-s) 0;
}
.contact-line__k{
  flex:0 0 auto;
  font-family:var(--font-mono);
  font-size:12px;
  letter-spacing:.08em;
  color:var(--orange-soft);
}
.contact-line__v{color:var(--text);word-break:break-all}
.footer-note{
  margin:14px 0 0;
  font-size:14px;
  color:var(--muted);
  padding-left:12px;
  border-left:3px solid var(--orange);
}

/* ============ responsive ============ */
@media (min-width:1100px){
  .index-rail{display:block}
}

@media (max-width:1024px){
  .wrap{padding:0 22px}
  .site-footer__inner{padding:0 22px}
  .span-3,.span-4{grid-column:span 6}
  .span-6,.span-8{grid-column:span 12}
  .keys{grid-template-columns:repeat(3,minmax(0,1fr))}
  h1{font-size:34px}
  h2{font-size:28px}
}

@media (max-width:860px){
  body{padding-left:0;padding-bottom:var(--foot)}
  .skip-link{left:12px}
  .site-header{display:block;inset:0}
  .rail{
    position:fixed !important;
    left:0;
    right:0;
    bottom:0;
    top:auto;
    width:auto;
    height:var(--foot);
    flex-direction:row;
    justify-content:space-between;
    align-items:center;
    gap:12px;
    padding:0 16px;
    border-right:0;
    border-top:var(--band-line);
  }
  .rail__brand{writing-mode:horizontal-tb}
  .rail__brand-sub{display:block;margin-block-start:2px;font-size:9px;letter-spacing:.18em}
  .rail__bead{width:8px;height:8px}
  .rail__dots{display:none}
  .rail__home{display:block}

  .topbar{
    position:fixed;
    top:0;
    left:0;
    right:0;
    height:var(--bar);
    padding:0 14px;
  }
  .topbar__marker{font-size:12px;letter-spacing:.08em}
  .nav-toggle{display:inline-flex}
  .nav{
    position:fixed;
    left:0;
    right:0;
    top:var(--bar);
    bottom:var(--foot);
    padding:14px 16px 28px;
    background:linear-gradient(180deg,rgba(11,11,15,.99),rgba(20,20,28,.99));
    border-bottom:var(--band-line);
    overflow-y:auto;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    transition:opacity .22s var(--ease),transform .22s var(--ease),visibility .22s;
  }
  .site-header[data-open] .nav{
    opacity:1;
    visibility:visible;
    transform:none;
  }
  .nav__list{flex-direction:column;align-items:stretch;gap:0}
  .nav__link{
    display:block;
    padding:15px 6px;
    font-size:17px;
    border-bottom:1px dashed rgba(166,163,190,.18);
    border-radius:0;
  }
  .nav__link::after{display:none}
  .nav__link[aria-current="page"]{
    color:var(--cyan);
    border-left:3px solid var(--cyan);
    padding-left:14px;
    background:rgba(0,229,255,.06);
  }

  #main-content{padding-top:calc(var(--bar) + 20px)}
  .section{padding-block:36px}
  .section + .section{padding-top:48px}
  .keys{grid-template-columns:repeat(2,minmax(0,1fr))}
  .catgrid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .data-row{grid-template-columns:70px 1fr;row-gap:4px}
  .card--wide{padding:20px}
  h1{font-size:28px}
  h2{font-size:24px}
  h3{font-size:18px}
  .site-footer{margin-top:64px;padding:40px 0 28px}
}

@media (max-width:480px){
  .wrap{padding:0 16px}
  .site-footer__inner{padding:0 16px}
  .keys{grid-template-columns:repeat(2,minmax(0,1fr))}
  .catgrid{grid-template-columns:1fr}
  .grid{gap:16px}
}

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