:root {
  --bg: #0d1117;
  --surface: #161b22;
  --border: #30363d;
  --text: #c9d1d9;
  --text-secondary: #8b949e;
  --accent: #58a6ff;
  --code-bg: #161b22;
  --max-width: 720px;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
}
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem; }
.site-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 1rem 0;
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.75rem; }
.site-title { font-size: 1.4rem; font-weight: 700; color: var(--text); text-decoration: none; }
.site-nav { display: flex; gap: 1rem; flex-wrap: wrap; }
.site-nav a { color: var(--text-secondary); text-decoration: none; font-size: 0.95rem; }
.site-nav a:hover { color: var(--accent); }
main.container { padding: 2.5rem 1.25rem; }
.page-content h1 { font-size: 2rem; border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.page-content h2 { font-size: 1.4rem; margin-top: 2rem; }
.page-content p { margin: 0.75rem 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  background: var(--code-bg);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.9em;
  border: 1px solid var(--border);
}
pre {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem;
  overflow-x: auto;
}
pre code { background: transparent; border: none; padding: 0; font-size: 0.85em; }
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
}