:root {
  --bg: #f6f5fa;
  --card: #ffffff;
  --ink: #1a1922;
  --ink-2: #55535f;
  --ink-3: #8a8794;
  --accent: #6b5ce0;
  --border: #e7e4f0;
  --maxw: 760px;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  padding: 0 20px;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 48px 0 80px; }
header.site {
  display: flex; align-items: center; gap: 12px;
  padding: 22px 0; border-bottom: 1px solid var(--border); margin-bottom: 34px;
}
.logo {
  width: 34px; height: 34px; border-radius: 11px; flex: none;
  background: linear-gradient(140deg, #5b6cf0, #a96bf3);
  display: grid; place-items: center;
}
.logo::after { content: ""; width: 15px; height: 15px; border: 2.5px solid #fff; border-radius: 50%; }
.brand { font-weight: 700; letter-spacing: -.01em; }
.brand span { color: var(--ink-3); font-weight: 500; }
nav.top { margin-left: auto; display: flex; gap: 18px; font-size: 14px; }
nav.top a { color: var(--ink-2); text-decoration: none; }
nav.top a:hover { color: var(--accent); }
h1 { font-size: 30px; letter-spacing: -.02em; margin: 0 0 6px; }
.eff { color: var(--ink-3); font-size: 14px; margin: 0 0 30px; }
h2 { font-size: 19px; letter-spacing: -.01em; margin: 34px 0 10px; }
p, li { color: var(--ink-2); }
a { color: var(--accent); }
strong { color: var(--ink); }
.card {
  background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 20px 24px; margin: 18px 0;
}
.callout {
  background: #f0eefb; border: 1px solid #ddd7f4; border-radius: 14px;
  padding: 16px 20px; margin: 20px 0; font-size: 15px;
}
ul { padding-left: 20px; }
li { margin: 6px 0; }
footer.site {
  margin-top: 56px; padding-top: 22px; border-top: 1px solid var(--border);
  color: var(--ink-3); font-size: 13px; display: flex; gap: 16px; flex-wrap: wrap;
}
footer.site a { color: var(--ink-3); }
.home-links { display: grid; gap: 14px; margin-top: 26px; }
.home-links a {
  display: block; background: var(--card); border: 1px solid var(--border);
  border-radius: 14px; padding: 18px 22px; text-decoration: none; color: var(--ink);
}
.home-links a:hover { border-color: var(--accent); }
.home-links .t { font-weight: 650; }
.home-links .d { color: var(--ink-2); font-size: 14px; margin-top: 3px; }
@media (prefers-color-scheme: dark) {
  :root {
    --bg:#0a0a0e; --card:#14141b; --ink:#f4f4f7; --ink-2:#b9b8c4; --ink-3:#7d7b88;
    --accent:#a99bff; --border:#26262f;
  }
  .callout { background: rgba(138,123,245,.10); border-color: rgba(138,123,245,.28); }
}