:root {
  --primary: #12243d;
  --ink: #101826;
  --accent: #d4a83c;
  --bg: #ffffff;
  --soft: #f5f6f7;
  --line: #e4e7ea;
  --muted: #5b6670;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; height: auto; border-radius: 6px; }
a { color: var(--primary); }
.container { width: 100%; max-width: 1080px; margin: 0 auto; padding: 0 20px; }
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
header.site .bar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 10px; padding: 16px 0;
}
.brand { font-size: 1.25rem; font-weight: 700; color: var(--ink); text-decoration: none; }
nav.main { display: flex; flex-wrap: wrap; gap: 6px; }
nav.main a {
  text-decoration: none; color: var(--muted); padding: 6px 12px; border-radius: 6px;
  font-weight: 600; font-size: 0.95rem;
}
nav.main a:hover { background: var(--soft); color: var(--ink); }
nav.main a.active { color: var(--primary); background: var(--soft); }
main { padding: 40px 0; }
main h1 { font-size: 2.1rem; line-height: 1.15; margin: 0 0 0.5em; }
main h2 { font-size: 1.5rem; margin: 1.6em 0 0.4em; }
main h3 { font-size: 1.2rem; margin: 1.4em 0 0.3em; }
main p { margin: 0 0 1em; }
main ul, main ol { margin: 0 0 1em; padding-left: 1.3em; }
table { border-collapse: collapse; width: 100%; margin: 0 0 1em; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; }
th { background: var(--soft); }
blockquote {
  margin: 0 0 1em; padding: 0.4em 1em; border-left: 4px solid var(--accent);
  background: var(--soft); color: var(--muted);
}
.btn, a.btn {
  display: inline-block; background: var(--primary); color: #fff; text-decoration: none;
  padding: 10px 20px; border-radius: 6px; font-weight: 600; margin: 0.3em 0;
}
footer.site {
  border-top: 1px solid var(--line); background: var(--soft);
  color: var(--muted); font-size: 0.92rem;
}
footer.site .inner { padding: 28px 0; }
footer.site a { color: var(--primary); }
@media (max-width: 640px) {
  main h1 { font-size: 1.7rem; }
  header.site .bar { flex-direction: column; align-items: flex-start; }
}