:root{
  color-scheme:light;
  --paper:#f6f5f0;
  --paper-2:#fffefb;
  --ink:#18171a;
  --ink-soft:#4a4852;
  --faint:#7a788a;
  --accent:#5e72e4;
  --accent-soft:rgba(94,114,228,.10);
  --line:rgba(0,0,0,.10);
  --line-strong:rgba(0,0,0,.20);
  --serif:"Instrument Serif",Georgia,"Times New Roman",serif;
  --sans:"Inter","Noto Sans SC",system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"JetBrains Mono",SFMono-Regular,Consolas,monospace;
  --ease:cubic-bezier(.22,.68,0,1.2);
  --side:260px;
}
html[data-theme="dark"]{
  color-scheme:dark;
  --paper:#0e0e12;
  --paper-2:#16151c;
  --ink:#f0eff4;
  --ink-soft:#a9a7b6;
  --faint:#7c7a8a;
  --accent:#8b9cf7;
  --accent-soft:rgba(139,156,247,.12);
  --line:rgba(255,255,255,.10);
  --line-strong:rgba(255,255,255,.22);
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  font-family:var(--sans);
  font-size:15px;
  line-height:1.7;
  color:var(--ink);
  background:var(--paper);
  transition:background .35s var(--ease),color .35s var(--ease);
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.skip-link{position:absolute;left:-9999px;top:0;z-index:99;background:var(--accent);color:#fff;padding:10px 16px;font-size:13px}
.skip-link:focus{left:12px;top:12px}
.shell{display:grid;grid-template-columns:var(--side) 1fr;min-height:100vh;max-width:1040px;margin:0 auto}
.sidebar{
  position:sticky;top:0;align-self:start;height:100vh;max-height:100vh;overflow-y:auto;overscroll-behavior:contain;
  border-right:1px solid var(--line);
  padding:38px 30px 26px;
  display:flex;flex-direction:column;gap:30px;
  background:var(--paper);
}
.brand{display:flex;flex-direction:column;gap:6px}
.brand .logo{font-family:var(--serif);font-size:30px;line-height:1.1;letter-spacing:-.01em}
.brand .logo em{font-style:normal;color:var(--accent)}
.brand .sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--faint)}
.side-nav{display:flex;flex-direction:column;gap:2px}
.side-nav .group-title{font-family:var(--mono);font-size:9.5px;letter-spacing:.24em;text-transform:uppercase;color:var(--faint);padding:14px 0 8px}
.side-nav a{
  position:relative;display:flex;align-items:baseline;gap:10px;
  padding:8px 0;font-size:14px;color:var(--ink-soft);
  border-bottom:1px solid transparent;transition:color .25s var(--ease);
}
.side-nav a .idx{font-family:var(--mono);font-size:10px;color:var(--faint);transition:color .25s var(--ease)}
.side-nav a::after{
  content:"";position:absolute;left:0;bottom:-1px;height:1px;width:0;
  background:var(--accent);transition:width .32s var(--ease);
}
.side-nav a:hover{color:var(--ink)}
.side-nav a:hover::after,.side-nav a.on::after{width:100%}
.side-nav a:hover .idx,.side-nav a.on .idx{color:var(--accent)}
.side-nav a.on{color:var(--ink)}
.side-nav a .ext{font-family:var(--mono);font-size:10px;color:var(--faint)}
.side-foot{margin-top:auto;display:flex;flex-direction:column;gap:16px}
.controls{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:2px;background:transparent;cursor:pointer;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.icon-btn:hover{border-color:var(--line-strong);color:var(--accent)}
.icon-btn svg{width:15px;height:15px}
.icon-btn .icon-sun{display:none}
html[data-theme="dark"] .icon-btn .icon-sun{display:block}
html[data-theme="dark"] .icon-btn .icon-moon{display:none}
.lang-switch{
  height:34px;padding:0 30px 0 12px;border:1px solid var(--line);border-radius:2px;
  background:transparent;color:var(--ink-soft);
  font-family:var(--mono);font-size:11px;letter-spacing:.12em;cursor:pointer;
  appearance:none;-webkit-appearance:none;
  background-image:url("data:image/svg+xml,\x3csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'\x3e\x3cpath d='M1 1l4 4 4-4' stroke='currentColor' stroke-width='1.4' fill='none' stroke-linecap='round' stroke-linejoin='round' opacity='.45'\x3e\x3c/path\x3e\x3c/svg\x3e");
  background-repeat:no-repeat;background-position:right 10px center;
  transition:border-color .25s var(--ease),color .25s var(--ease);
}
.lang-switch:hover{border-color:var(--line-strong);color:var(--accent)}
.lang-switch:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.lang-switch option{background:var(--paper-2);color:var(--ink);font-family:var(--sans);font-size:13px}
.main{width:100%;max-width:780px;margin:0 auto;padding:64px 56px 0}
.hero{padding-bottom:52px;border-bottom:1px solid var(--line)}
.hero .kicker{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--mono);font-size:10.5px;letter-spacing:.22em;text-transform:uppercase;color:var(--accent);
}
.hero .kicker::before{content:"";width:26px;height:1px;background:var(--accent)}
.hero h1{
  font-family:var(--serif);font-weight:400;
  font-size:clamp(2.6rem,6vw,3.8rem);line-height:1.08;letter-spacing:-.01em;
  margin:18px 0 16px;
}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero .lede{max-width:46ch;font-size:15.5px;color:var(--ink-soft)}
.hero .facts{display:flex;flex-wrap:wrap;gap:26px;margin-top:28px}
.hero .fact{display:flex;flex-direction:column;gap:3px}
.hero .fact .k{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint)}
.hero .fact .v{font-size:14px}
.hero .actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  display:inline-flex;align-items:center;gap:8px;height:42px;padding:0 22px;
  border:1px solid var(--line-strong);border-radius:2px;background:transparent;
  font-size:13.5px;letter-spacing:.02em;cursor:pointer;
  transition:background .25s var(--ease),color .25s var(--ease),border-color .25s var(--ease),transform .25s var(--ease);
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:transparent;color:var(--accent)}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}
.block{padding:48px 0;border-bottom:1px solid var(--line)}
.block:last-of-type{border-bottom:0}
.block-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:26px}
.block-head .t{display:flex;align-items:center;gap:12px}
.block-head .num{font-family:var(--mono);font-size:10.5px;letter-spacing:.16em;color:var(--accent)}
.block-head h2{font-family:var(--serif);font-size:26px;font-weight:400;letter-spacing:-.005em}
.block-head .hint{font-family:var(--mono);font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--faint)}
.posts{display:flex;flex-direction:column}
.post-row{
  display:grid;grid-template-columns:34px 1fr auto;align-items:baseline;gap:18px;
  padding:16px 2px;border-top:1px solid var(--line);
  transition:background .25s var(--ease);
}
.post-row:last-child{border-bottom:1px solid var(--line)}
.post-row:hover{background:var(--accent-soft)}
.post-row .no{font-family:var(--mono);font-size:11px;color:var(--faint)}
.post-row .ti{font-size:15px;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.post-row:hover .ti{color:var(--accent)}
.post-row .dt{font-family:var(--mono);font-size:11px;color:var(--faint);white-space:nowrap}
.links{display:flex;flex-direction:column}
.link-row{
  display:grid;grid-template-columns:112px 1fr auto;align-items:center;gap:16px;
  padding:15px 2px;border-top:1px solid var(--line);
  transition:background .25s var(--ease);
}
.link-row:last-child{border-bottom:1px solid var(--line)}
.link-row:hover{background:var(--accent-soft)}
.link-row .k{font-family:var(--mono);font-size:9.5px;letter-spacing:.2em;text-transform:uppercase;color:var(--faint)}
.link-row .v{font-size:14.5px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.link-row .v:hover{color:var(--accent)}
.link-row .v[role="button"]{cursor:pointer}
.link-row .go{font-family:var(--mono);font-size:11px;color:var(--faint);transition:color .25s var(--ease),transform .25s var(--ease)}
.link-row:hover .go{color:var(--accent);transform:translateX(3px)}
.loading,.error{font-family:var(--mono);font-size:11.5px;color:var(--faint);padding:18px 2px;border-top:1px solid var(--line)}
.site-foot{
  padding:34px 0 48px;max-width:none;margin-top:6px;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  border-top:1px solid var(--line);
}
.site-foot .copy{font-family:var(--mono);font-size:11px;color:var(--faint)}
.site-foot a{font-size:12.5px;color:var(--ink-soft);border-bottom:1px solid transparent;transition:color .25s var(--ease),border-color .25s var(--ease)}
.site-foot a:hover{color:var(--accent);border-color:var(--accent)}
.js .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.js .reveal.in{opacity:1;transform:none}
.mobile-bar{display:none}
@media (max-width:900px){
  .shell{grid-template-columns:1fr}
  .sidebar{position:static;height:auto;border-right:0;border-bottom:1px solid var(--line);padding:24px 22px 20px;gap:20px}
  .side-nav{flex-direction:row;flex-wrap:wrap;gap:0 18px}
  .side-nav .group-title{display:none}
  .side-nav a{padding:6px 0;font-size:13.5px}
  .side-foot{margin-top:0;flex-direction:row;align-items:center;justify-content:space-between}
  .hero{padding-bottom:38px}
  .main{padding:40px 22px 0;max-width:none}
  .block{padding:36px 0}
  .post-row{grid-template-columns:34px 1fr;gap:12px}
  .post-row .dt{grid-column:2;font-size:10.5px}
  .link-row{grid-template-columns:88px 1fr;gap:10px}
  .link-row .go{display:none}
  .site-foot{padding:26px 22px 34px;max-width:none;flex-direction:column;align-items:flex-start;gap:8px}
}
@media (max-width:520px){
  .hero h1{font-size:2.2rem}
  .hero .facts{gap:18px}
  .btn{height:40px;padding:0 16px;font-size:13px}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .js .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}