:root {
  color-scheme: light;
  --ink: #111111;
  --muted: #5e6570;
  --line: #222222;
  --soft-line: #cfd4da;
  --paper: #ffffff;
  --note: #f3f6f8;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0 48px;
}

.masthead {
  border-bottom: 2px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 26px;
}

.brand {
  font-size: 36px;
  font-weight: 800;
  margin: 0;
  letter-spacing: 0;
}

.subtitle {
  color: var(--muted);
  font-size: 18px;
  margin: 6px 0 0;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  border-bottom: 1px solid var(--line);
  padding: 0 0 16px;
  margin: 0 0 28px;
}

h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 10px;
}

h2 {
  border-bottom: 1px solid var(--soft-line);
  font-size: 21px;
  line-height: 1.3;
  margin: 30px 0 10px;
  padding-bottom: 6px;
}

p,
li {
  font-size: 17px;
}

ul {
  padding-left: 24px;
}

.note {
  background: var(--note);
  border: 1px solid var(--line);
  margin: 20px 0;
  padding: 14px 16px;
}

.meta {
  color: var(--muted);
  font-size: 15px;
}

.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  margin-top: 38px;
  padding-top: 18px;
}

@media (max-width: 560px) {
  .page {
    width: min(100% - 24px, 880px);
    padding-top: 26px;
  }

  .brand {
    font-size: 32px;
  }

  h1 {
    font-size: 25px;
  }
}