:root {
  --ink: #183445;
  --muted: #587181;
  --paper: #fffdfa;
  --line: rgba(24, 52, 69, 0.16);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

header {
  position: sticky;
  top: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
  padding: 0 max(24px, calc((100vw - 900px) / 2));
  background: rgba(255, 253, 250, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

header a { color: var(--muted); text-decoration: none; }
header strong { font-family: "STKaiti", "KaiTi", serif; font-size: 20px; }

main {
  width: min(calc(100% - 40px), 900px);
  margin: 0 auto;
  padding: 64px 0 110px;
}

pre {
  margin: 0;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  font: 15px/2 "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

@media (max-width: 760px) {
  header { padding-inline: 18px; }
  main { width: calc(100% - 36px); padding-top: 42px; }
  pre { font-size: 14px; line-height: 1.85; }
}