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

:root{
  --violet:#6514ff;
  --magenta:#bf00ff;
  --ink:#1c1726;
  --ink-2:#251c36;
  --fg:#f4efff;
  --dim:#b4a6d5;
  --line:rgba(191,0,255,.28);
  --grad:linear-gradient(135deg,#6514ff,#bf00ff);
  --r:10px;
  --d:"Space Grotesk","Inter",system-ui,sans-serif;
}

*,*::before,*::after{box-sizing:border-box}

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

body{
  margin:0;
  font-family:"Inter",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  font-size:17px;
  line-height:1.78;
  color:var(--fg);
  background:
    radial-gradient(80rem 40rem at 88% -12%,rgba(191,0,255,.24),transparent 62%),
    radial-gradient(60rem 36rem at -10% 18%,rgba(101,20,255,.26),transparent 58%),
    var(--ink);
  background-attachment:fixed;
  overflow-x:hidden;
}

body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:repeating-linear-gradient(115deg,rgba(191,0,255,.1) 0 2px,transparent 2px 28px);
  animation:drift 26s linear infinite;
}

@keyframes drift{from{background-position:0 0}to{background-position:-28px 0}}

header,main,footer{position:relative;z-index:1}

h1,h2,h3,.foot-word{
  font-family:var(--d);
  font-weight:700;
  line-height:1.12;
  letter-spacing:-.025em;
  margin:0;
}

p{margin:0}
ol{list-style:none;margin:0;padding:0}
a{color:inherit;text-decoration:none}
img{max-width:100%}
:focus-visible{outline:2px solid var(--magenta);outline-offset:2px}

.skip{
  position:absolute;
  left:14px;
  top:-60px;
  z-index:90;
  padding:10px 18px;
  border-radius:var(--r);
  background:var(--magenta);
  color:#fff;
  font-size:16px;
  transition:top .2s ease;
}
.skip:focus{top:14px}

.topbar{
  position:sticky;
  top:0;
  z-index:60;
  background:rgba(19,13,31,.88);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}

.topbar-strip{background:linear-gradient(90deg,rgba(101,20,255,.9),rgba(191,0,255,.9))}

.ticker{
  margin:0;
  padding:5px 20px;
  font-size:16px;
  line-height:1.55;
  letter-spacing:.04em;
  color:#f3e6ff;
  white-space:nowrap;
  overflow:hidden;
  text-overflow:ellipsis;
}

.topbar-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  max-width:1240px;
  margin:0 auto;
  padding:10px 20px;
}

.mark{
  flex:0 0 auto;
  display:grid;
  place-items:center;
  width:44px;
  height:44px;
  border-radius:var(--r);
  background:var(--grad);
  box-shadow:inset 0 -3px 0 rgba(10,4,24,.45);
  font-family:var(--d);
  font-size:20px;
  font-weight:700;
  color:#fff;
  transition:transform .22s ease,filter .22s ease;
}
.mark:hover{transform:translateY(-2px) rotate(-3deg);filter:saturate(1.35)}
.mark-img{width:40px;height:40px;object-fit:contain;border-radius:8px;display:block}

.nav{min-width:0}

.nav ol{
  display:flex;
  align-items:center;
  gap:4px;
  overflow-x:auto;
  scrollbar-width:none;
}
.nav ol::-webkit-scrollbar{display:none}

.nav a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:8px 14px;
  border-radius:8px;
  font-size:16px;
  font-weight:500;
  color:var(--dim);
  white-space:nowrap;
  transition:background-color .22s ease,color .22s ease,transform .22s ease;
}
.nav a:hover,.nav a:focus-visible{background:var(--grad);color:#fff;transform:translateY(-1px)}
.nav a.is-active{color:#fff;box-shadow:inset 0 -2px 0 var(--magenta)}

.hero{
  position:relative;
  display:flex;
  align-items:flex-end;
  justify-content:flex-end;
  min-height:45vh;
  padding:clamp(20px,4vw,56px);
  overflow:hidden;
  clip-path:polygon(0 0,100% 0,100% 84%,0 100%);
  background:linear-gradient(120deg,rgba(101,20,255,.55),rgba(28,23,38,.25) 48%,rgba(191,0,255,.5));
}

.hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:radial-gradient(rgba(244,239,255,.3) 1px,transparent 1px);
  background-size:18px 18px;
  opacity:.55;
  animation:dotmove 18s linear infinite;
}

@keyframes dotmove{to{background-position:18px 18px}}

.hero::after{
  content:"";
  position:absolute;
  right:-9vmin;
  top:-12vmin;
  width:44vmin;
  height:44vmin;
  border-radius:50%;
  background:conic-gradient(from 0deg,#6514ff,#bf00ff,#6514ff);
  opacity:.7;
  animation:spin 24s linear infinite;
}

@keyframes spin{to{transform:rotate(1turn)}}

.hero-media{position:absolute;inset:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.5;display:block}

.hero-inner{position:relative;z-index:2;text-align:right;max-width:min(920px,100%)}

.hero h1{
  font-size:clamp(32px,6.4vw,66px);
  text-shadow:0 10px 34px rgba(10,4,24,.8);
}
.hero h1::after{
  content:"";
  display:block;
  width:96px;
  height:8px;
  margin:18px 0 0 auto;
  border-radius:99px;
  background:var(--grad);
}

.shell{
  display:grid;
  grid-template-columns:236px minmax(0,1fr);
  gap:48px;
  align-items:start;
  max-width:1180px;
  margin:0 auto;
  padding:64px 24px 72px;
}

.rail{
  position:sticky;
  top:112px;
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:20px 18px;
  border:1px solid var(--line);
  border-radius:var(--r);
  background:rgba(101,20,255,.14);
  box-shadow:inset 0 -3px 0 var(--magenta);
}
.rail h2{font-size:19px}
.rail hr{
  width:100%;
  height:2px;
  margin:0;
  border:0;
  background:linear-gradient(90deg,var(--magenta),transparent);
}
.rail-list{display:flex;flex-direction:column;gap:2px}
.rail-list a{
  display:flex;
  align-items:center;
  min-height:40px;
  padding:6px 10px;
  border-radius:8px;
  font-size:16px;
  color:var(--dim);
  transition:background-color .2s ease,color .2s ease;
}
.rail-list a:hover,.rail-list a:focus-visible{background:rgba(191,0,255,.24);color:#fff}
.rail-top{
  align-self:flex-start;
  display:inline-flex;
  align-items:center;
  min-height:40px;
  margin-top:2px;
  padding:8px 16px;
  border:1px solid var(--line);
  border-radius:99px;
  font-size:16px;
  color:var(--dim);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.rail-top:hover{background:var(--grad);border-color:transparent;color:#fff}

.prose{min-width:0}

.prose > article{
  position:relative;
  margin:0 0 48px;
  padding:clamp(20px,3.2vw,40px);
  border:1px solid rgba(191,0,255,.18);
  border-radius:var(--r);
  background:rgba(37,28,54,.72);
  box-shadow:inset 0 -4px 0 var(--grad),0 22px 52px rgba(9,4,20,.38);
  scroll-margin-top:112px;
}
.prose > article:last-child{margin-bottom:0}

.prose h2{font-size:clamp(24px,3.4vw,34px);margin:0 0 14px}
.prose h3{font-size:clamp(20px,2.4vw,24px);margin:26px 0 10px;color:#efe3ff}
.prose hr{
  height:3px;
  margin:0 0 20px;
  border:0;
  border-radius:99px;
  background:linear-gradient(90deg,var(--violet),var(--magenta),transparent);
}
.prose p{margin:0 0 16px;max-width:70ch;color:#e7def8}
.prose p:last-child{margin-bottom:0}
.prose ul,.prose ol{list-style:disc;padding-left:22px;margin:0 0 16px}
.prose ol{list-style:decimal}
.prose li{margin:0 0 8px}
.prose strong{color:#fff}
.prose a{color:#dcc6ff;border-bottom:1px solid var(--magenta)}
.prose a:hover{color:#fff;background:rgba(191,0,255,.22)}
.prose img{display:block;height:auto;margin:18px 0;border-radius:var(--r)}
.prose blockquote{
  margin:18px 0;
  padding:12px 18px;
  border-radius:0 var(--r) var(--r) 0;
  border-left:4px solid var(--magenta);
  background:rgba(191,0,255,.12);
}
.prose code{
  font-family:"JetBrains Mono",ui-monospace,monospace;
  font-size:16px;
  padding:1px 6px;
  border-radius:6px;
  background:rgba(0,0,0,.38);
}

.foot{
  margin-top:48px;
  padding:56px 24px 32px;
  border-top:1px solid var(--line);
  background:linear-gradient(180deg,rgba(28,23,38,.25),rgba(14,10,23,.96));
}
.foot article{max-width:1180px;margin:0 auto}

.foot-word{
  font-size:clamp(44px,12vw,118px);
  line-height:.94;
  letter-spacing:-.05em;
  background:linear-gradient(120deg,#a98bff,#bf00ff 58%,#6514ff);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}

.foot-links{margin-top:26px}
.foot-links ol{display:flex;flex-wrap:wrap;gap:8px 6px}
.foot-links a{
  display:inline-flex;
  align-items:center;
  min-height:40px;
  padding:8px 14px;
  border:1px solid var(--line);
  border-radius:99px;
  font-size:16px;
  color:var(--dim);
  transition:background-color .2s ease,color .2s ease,border-color .2s ease;
}
.foot-links a:hover,.foot-links a:focus-visible{background:var(--grad);border-color:transparent;color:#fff}

.foot-copy{
  margin-top:22px;
  padding-top:16px;
  border-top:1px solid rgba(191,0,255,.16);
  font-size:16px;
  color:var(--dim);
}

.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .26s ease,transform .26s ease}
.js .reveal.on{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  body::before,.hero::before,.hero::after{animation:none}
  .js .reveal{opacity:1;transform:none;transition:none}
}

@media (max-width:900px){
  .shell{grid-template-columns:1fr;gap:32px;padding:40px 18px 56px}
  .rail{position:static;top:auto}
  .rail-list{flex-direction:row;flex-wrap:wrap;gap:6px}
  .rail-list a{border:1px solid var(--line);padding:6px 12px}
  .rail hr{display:none}
  .hero{min-height:42vh;clip-path:polygon(0 0,100% 0,100% 90%,0 100%)}
  .topbar-bar{flex-wrap:wrap;gap:10px;padding:10px 14px}
  .nav{order:2;width:100%}
  .nav ol{padding-bottom:2px}
  .prose > article{margin-bottom:32px}
}

@media (max-width:520px){
  body{font-size:16px}
  .prose > article{padding:18px 16px;border-radius:8px}
  .prose h2{font-size:24px}
  .foot{padding:44px 18px 28px}
}

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