:root {
  color-scheme: light;
  --page-bg: #f1f5f6;
  --paper-bg: #ffffff;
  --text-main: #2d2a26;
  --text-body: #5d5a54;
  --text-muted: #96918a;
  --line: #eeeeea;
  --accent: #4b6f60;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--page-bg);
}

body {
  margin: 0;
  background: var(--page-bg);
  color: var(--text-main);
  font-family:
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(22px + env(safe-area-inset-top)) 18px
    calc(36px + env(safe-area-inset-bottom));
  line-height: 1.78;
}

.document {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper-bg);
  padding: 22px 18px 26px;
  box-shadow: none;
}

h1 {
  margin: 0 0 8px;
  color: var(--text-main);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.28;
}

h2 {
  margin: 28px 0 10px;
  color: var(--text-main);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
}

p,
li {
  color: var(--text-body);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.78;
}

p {
  margin: 12px 0;
}

ul {
  margin: 10px 0 0;
  padding-left: 20px;
}

li {
  margin: 7px 0;
}

.muted {
  margin-bottom: 18px;
  color: var(--text-muted);
  font-size: 14px;
}

.intro,
.card {
  margin: 18px 0 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8f8f6;
  padding: 14px 15px;
}

.intro p,
.card p {
  margin: 0;
}

.contact {
  color: var(--accent);
  font-weight: 600;
  word-break: break-all;
}

@media (min-width: 768px) {
  main {
    padding-right: 24px;
    padding-left: 24px;
  }

  .document {
    padding: 30px 34px 38px;
  }
}