@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Sans:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root{
  --ink:#1c1726;
  --violet:#6514ff;
  --magenta:#bf00ff;
  --night:#100c1a;
  --fg:#f4effd;
  --dim:#b7a7d6;
  --line:rgba(191,0,255,.26);
  --mono:'JetBrains Mono',ui-monospace,SFMono-Regular,Menlo,monospace;
  --sans:'IBM Plex Sans',system-ui,-apple-system,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;
}

*{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  margin:0;
  padding:0 0 112px;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.72;
  color:var(--fg);
  background-color:var(--night);
  background-image:
    radial-gradient(rgba(101,20,255,.40) 1px,transparent 1px),
    radial-gradient(rgba(191,0,255,.17) 1px,transparent 1px);
  background-size:26px 26px,26px 26px;
  background-position:0 0,13px 13px;
  animation:drift 30s linear infinite;
}

@keyframes drift{
  to{background-position:26px 26px,39px 39px}
}

@keyframes rise{
  from{opacity:0;transform:translateY(18px)}
  to{opacity:1;transform:none}
}

header{
  position:fixed;
  left:0;right:0;bottom:0;
  z-index:80;
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 14px;
  background:rgba(13,10,22,.97);
  border-top:2px solid var(--violet);
  box-shadow:0 -12px 32px rgba(0,0,0,.55);
}

.brand{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  gap:8px;
  min-height:44px;
  padding:0 12px;
  font-family:var(--mono);
  font-size:16px;
  font-weight:700;
  letter-spacing:.08em;
  color:#fff;
  text-decoration:none;
  background:var(--violet);
  box-shadow:4px 4px 0 0 var(--magenta);
}
.brand .mark{display:block;width:26px;height:26px;object-fit:cover}

header nav{flex:1 1 auto;min-width:0;overflow-x:auto;scrollbar-width:thin}
header nav p{display:flex;gap:6px;margin:0;padding:0 2px}

header nav a{
  display:inline-flex;
  align-items:center;
  min-height:42px;
  padding:8px 12px;
  font-size:16px;
  color:var(--dim);
  white-space:nowrap;
  text-decoration:none;
  border:1px solid transparent;
  transition:color .22s ease,background-color .22s ease,border-color .22s ease;
}
header nav a .ico{
  flex:0 0 auto;
  width:7px;height:7px;
  margin-right:8px;
  background:var(--magenta);
  transition:background-color .22s ease;
}
header nav a:hover,
header nav a:focus-visible{color:#fff;background:rgba(101,20,255,.38);border-color:var(--violet)}
header nav a:hover .ico{background:#fff}

.ping{
  flex:0 0 auto;
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 14px;
  font-family:var(--mono);
  font-size:15px;
  font-weight:700;
  color:var(--ink);
  text-decoration:none;
  background:var(--magenta);
  transition:background-color .22s ease,color .22s ease;
}
.ping:hover,.ping:focus-visible{background:#fff;color:var(--violet)}

main{
  display:grid;
  grid-template-columns:minmax(0,1fr) 292px;
  gap:56px;
  max-width:1180px;
  margin:0 auto;
  padding:0 20px;
}

section{min-width:0}
section > div{padding:40px 0 10px;scroll-margin-top:28px}
section > div + div{border-top:1px solid var(--line)}
section > div.seen{animation:rise .55s ease both}

.hero{
  display:grid;
  grid-template-columns:1.1fr .9fr;
  gap:48px;
  align-items:center;
  min-height:45vh;
  padding:40px 0 44px;
  animation:rise .5s ease both;
}
.hero.solo{grid-template-columns:1fr}

.kicker{
  margin:0 0 14px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.2em;
  color:var(--magenta);
}

h1{
  margin:0 0 18px;
  font-size:clamp(32px,6vw,62px);
  line-height:1.06;
  letter-spacing:-.02em;
  font-weight:700;
}

.lead{
  margin:0 0 28px;
  max-width:34em;
  color:var(--dim);
}

.cta{
  display:inline-flex;
  align-items:center;
  min-height:50px;
  padding:0 26px;
  font-family:var(--mono);
  font-size:16px;
  font-weight:700;
  letter-spacing:.08em;
  color:#fff;
  text-decoration:none;
  background:var(--magenta);
  box-shadow:6px 6px 0 0 var(--violet);
  transition:transform .22s ease,box-shadow .22s ease;
}
.cta:hover,.cta:focus-visible{transform:translate(-2px,-2px);box-shadow:9px 9px 0 0 var(--violet)}

.hero-fig{margin:0;position:relative;box-shadow:0 26px 64px rgba(101,20,255,.38)}
.hero-fig::after{
  content:"";
  position:absolute;
  right:-10px;bottom:-10px;
  width:56px;height:56px;
  background:var(--magenta);
  mix-blend-mode:screen;
  pointer-events:none;
}
.hero-fig img{display:block;width:100%;height:100%;max-height:46vh;object-fit:cover;will-change:transform}

section h2{
  display:flex;
  align-items:baseline;
  gap:12px;
  margin:0 0 14px;
  font-size:clamp(25px,3.6vw,38px);
  line-height:1.16;
  letter-spacing:-.01em;
}
section h2::before{
  content:"";
  flex:0 0 auto;
  width:14px;height:14px;
  background:var(--magenta);
  transform:translateY(2px);
}
section h3{margin:30px 0 10px;font-size:20px;color:#fff}
section p{margin:0 0 16px;max-width:38em}
section ul,section ol{margin:0 0 18px;padding-left:22px}
section li{margin:0 0 8px}
section img{display:block;max-width:100%;height:auto;margin:20px 0}
section a{color:#dcc7ff;text-underline-offset:3px;text-decoration-color:var(--magenta)}
section a:hover{color:#fff;background:rgba(191,0,255,.18)}
section blockquote{
  margin:0 0 18px;
  padding:14px 18px;
  border-left:4px solid var(--violet);
  background:rgba(101,20,255,.13);
}
section table{width:100%;margin:0 0 20px;border-collapse:collapse;font-size:16px}
section th,section td{border:1px solid var(--line);padding:10px 12px;text-align:left}
section th{background:rgba(101,20,255,.2)}

.tail{display:flex;justify-content:flex-end}
section .to-top{
  display:inline-flex;
  align-items:center;
  min-height:44px;
  padding:0 16px;
  font-family:var(--mono);
  font-size:15px;
  color:var(--dim);
  text-decoration:none;
  border:1px solid var(--line);
}
section .to-top:hover{color:#fff;border-color:var(--magenta);background:rgba(191,0,255,.16)}

.rail{
  align-self:start;
  position:sticky;
  top:24px;
  margin-top:40px;
  padding:20px 18px;
  background:rgba(28,23,38,.88);
  border-left:4px solid var(--violet);
  box-shadow:0 18px 44px rgba(0,0,0,.5);
}
.rail h2{
  margin:0 0 6px;
  font-family:var(--mono);
  font-size:19px;
  letter-spacing:.04em;
}
.rail .subtitle{
  margin:0 0 16px;
  font-family:var(--mono);
  font-size:13px;
  letter-spacing:.14em;
  color:var(--magenta);
}
.rail-list{list-style:none;margin:0;padding:0}
.rail-list li + li{border-top:1px solid rgba(191,0,255,.16)}
.rail-list a{
  display:block;
  min-height:42px;
  padding:11px 4px;
  font-size:16px;
  color:var(--dim);
  text-decoration:none;
  transition:color .2s ease,padding-left .2s ease,background-color .2s ease;
}
.rail-list a:hover{color:#fff;padding-left:10px;background:rgba(191,0,255,.15)}

footer{
  display:grid;
  grid-template-columns:1.2fr 1fr 1fr;
  gap:32px 48px;
  max-width:1180px;
  margin:64px auto 0;
  padding:44px 20px 22px;
  border-top:2px solid var(--violet);
  font-size:16px;
}
footer address{
  font-style:normal;
  font-family:var(--mono);
  font-size:19px;
  font-weight:700;
  letter-spacing:.06em;
  color:#fff;
}
footer ul{list-style:none;margin:0;padding:0}
footer ul a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:4px 0;
  color:var(--dim);
  text-decoration:none;
}
footer ul a:hover{color:#fff}
.copy{
  grid-column:1/-1;
  margin:0;
  padding-top:16px;
  border-top:1px solid var(--line);
  font-family:var(--mono);
  font-size:14px;
  color:var(--dim);
}

@media (max-width:900px){
  main{grid-template-columns:1fr;gap:36px}
  .rail{position:static;margin-top:8px}
  .hero{grid-template-columns:1fr;gap:32px;min-height:0;padding:28px 0 36px}
  .hero-fig img{max-height:none;aspect-ratio:16/10}
  footer{grid-template-columns:1fr 1fr}
  footer .f-col:first-child{grid-column:1/-1}
}

@media (max-width:560px){
  body{padding-bottom:152px;font-size:16px}
  header{flex-wrap:wrap;gap:8px;padding:8px 10px}
  .brand{min-height:40px;padding:0 10px;font-size:15px}
  header nav{order:3;flex-basis:100%}
  h1{font-size:clamp(30px,9vw,44px)}
  section > div{padding:32px 0 8px}
  footer{grid-template-columns:1fr}
  .hero-fig::after{width:36px;height:36px}
}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
  .hero-fig img{transform:none !important}
}

button[aria-expanded]{min-width:44px;min-height:44px}