* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: #1f2933;
  background: #f7faf9;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

main {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 64px;
}

article {
  padding: 32px;
  border: 1px solid #dbe5e1;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 16px 40px rgba(31, 41, 51, 0.06);
}

h1,
h2,
h3 {
  line-height: 1.35;
  color: #14213d;
}

h1 {
  margin: 0 0 12px;
  font-size: 30px;
}

h2 {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid #e6eeeb;
  font-size: 22px;
}

h3 {
  margin-top: 22px;
  font-size: 18px;
}

p,
li {
  font-size: 16px;
}

a {
  color: #0f766e;
}

.meta,
.notice {
  color: #52606d;
}

.notice {
  padding: 14px 16px;
  border-left: 4px solid #0f766e;
  border-radius: 8px;
  background: #ecfdf5;
}

table {
  width: 100%;
  margin: 16px 0;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
}

th,
td {
  padding: 12px;
  border: 1px solid #dbe5e1;
  text-align: left;
  vertical-align: top;
}

th {
  background: #f0f7f4;
  color: #25313f;
}

code {
  padding: 2px 5px;
  border-radius: 4px;
  background: #eef2f7;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
}

@media (max-width: 640px) {
  main {
    width: min(100% - 20px, 920px);
    padding: 20px 0 40px;
  }

  article {
    padding: 20px;
    border-radius: 10px;
  }

  h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  table {
    display: block;
    overflow-x: auto;
  }
}