:root {
  color-scheme: light;
  --text: #202124;
  --muted: #6b7280;
  --line: #e5e7eb;
  --accent: #2563eb;
  --panel: #f8fafc;
}

* { box-sizing: border-box; }

html { background: #f3f4f6; }

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

main {
  width: min(920px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: 32px 24px 64px;
  background: #fff;
}

h1 { margin: 0 0 8px; font-size: 28px; line-height: 1.35; }
h2 { margin: 32px 0 8px; font-size: 21px; line-height: 1.45; }
h3 { margin: 22px 0 6px; font-size: 17px; }
p { margin: 8px 0; }
ul, ol { padding-left: 24px; }
li { margin: 4px 0; }
a { color: var(--accent); overflow-wrap: anywhere; }

.meta {
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
}

.notice {
  margin: 20px 0;
  padding: 14px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 6px;
  background: var(--panel);
}

.table-wrap { margin: 14px 0; overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td {
  min-width: 120px;
  padding: 10px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}
th { background: var(--panel); font-weight: 600; }

footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 640px) {
  main { padding: 24px 18px 48px; }
  h1 { font-size: 25px; }
  h2 { font-size: 20px; }
}