* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px; line-height: 1.65; color: #1f2937; background: #f9fafb;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 760px; margin: 0 auto; padding: 48px 24px 80px;
}
header { border-bottom: 1px solid #e5e7eb; padding-bottom: 20px; margin-bottom: 32px; }
h1 { font-size: 32px; margin: 0 0 8px; font-weight: 700; }
h2 { font-size: 20px; margin: 32px 0 12px; font-weight: 600; }
h3 { font-size: 16px; margin: 20px 0 8px; font-weight: 600; color: #374151; }
.meta { color: #6b7280; font-size: 14px; margin: 0; display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.meta .sep { opacity: 0.5; }
.meta a { color: #4f46e5; text-decoration: none; font-weight: 500; }
.meta a:hover { text-decoration: underline; }
p { margin: 12px 0; }
ul { margin: 12px 0 12px 24px; padding: 0; }
li { margin: 6px 0; }
code {
  background: #eef2ff; color: #4338ca; padding: 1px 6px;
  border-radius: 4px; font-size: 0.9em; font-family: 'SF Mono', Menlo, monospace;
}
a { color: #4f46e5; }
a:hover { text-decoration: underline; }
strong { color: #111827; }

@media (prefers-color-scheme: dark) {
  body { background: #111827; color: #e5e7eb; }
  h3 { color: #d1d5db; }
  strong { color: #f9fafb; }
  header { border-color: #374151; }
  code { background: #312e81; color: #c7d2fe; }
  .meta { color: #9ca3af; }
  .meta a { color: #818cf8; }
  a { color: #818cf8; }
}