:root {
  --ink: #111827;
  --ivory: #f7f3ea;
  --seal: #b13a2b;
  --muted: #5c636b;
  --line: #e6dfd2;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--ivory);
  color: var(--ink);
  line-height: 1.7;
}
a { color: var(--seal); text-decoration: none; }
a:hover { text-decoration: underline; }
header, main, footer { max-width: 720px; margin: 0 auto; padding: 0 24px; }
header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 28px;
  padding-bottom: 8px;
}
header img { width: 40px; height: 40px; border-radius: 8px; }
header .brand { font-weight: 650; letter-spacing: 0.04em; }
header nav { margin-left: auto; display: flex; gap: 16px; font-size: 14px; }
h1 { font-size: 28px; line-height: 1.25; margin: 24px 0 8px; }
h2 { font-size: 18px; margin: 28px 0 8px; }
.lede { font-size: 18px; color: var(--muted); margin: 0 0 28px; }
.card {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 12px;
  padding: 20px 22px;
  margin: 16px 0;
}
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: #f3eee3; }
footer {
  color: var(--muted);
  font-size: 13px;
  padding: 40px 24px 48px;
  border-top: 1px solid var(--line);
  margin-top: 48px;
}
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.92em; }
ul { padding-left: 20px; }