:root {
  --ink: #111111;
  --muted: #555555;
  --line: #d9d9d9;
  --soft-line: #eeeeee;
  --paper: #ffffff;
  --table-head: #f5f5f5;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
}

a {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.shell {
  width: min(860px, 100%);
  margin: 0 auto;
  padding: 24px 28px 48px;
}

.document {
  background: var(--paper);
}

.doc-header {
  padding: 0 0 18px;
  border-bottom: 1px solid var(--line);
}

h1 {
  margin: 0;
  color: var(--ink);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.4;
  text-align: center;
}

.doc-summary {
  margin: 14px 0 0;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.8;
}

.doc-meta {
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.doc-meta span {
  display: block;
}

.content {
  padding: 0;
}

section {
  padding-top: 22px;
}

h2 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.6;
}

h2 span {
  display: inline;
  margin-right: 6px;
  color: var(--ink);
  font-size: inherit;
  font-weight: 700;
}

p {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 15px;
  line-height: 1.85;
}

strong {
  font-weight: 700;
}

.note {
  margin: 14px 0 0;
  padding: 12px 14px;
  border: 1px solid var(--line);
  color: var(--ink);
  font-size: 14px;
  line-height: 1.8;
}

.table-wrap {
  overflow-x: auto;
  margin: 12px 0 4px;
  border: 1px solid var(--line);
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: var(--paper);
}

th,
td {
  padding: 10px 12px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
  line-height: 1.7;
}

th:last-child,
td:last-child {
  border-right: 0;
}

tr:last-child td {
  border-bottom: 0;
}

th {
  background: var(--table-head);
  font-weight: 700;
}

td a {
  overflow-wrap: anywhere;
  word-break: break-word;
}

.footer {
  margin-top: 30px;
  padding-top: 16px;
  border-top: 1px solid var(--soft-line);
  color: var(--muted);
  font-size: 13px;
  text-align: left;
}

.footer p {
  margin: 4px 0;
  color: var(--muted);
  font-size: 13px;
}

@media (max-width: 720px) {
  html {
    font-size: 15px;
  }

  .shell {
    padding: 18px 16px 36px;
  }

  h1 {
    font-size: 22px;
    text-align: left;
  }

  .doc-summary,
  p {
    font-size: 14px;
  }

  h2 {
    font-size: 17px;
  }

  th,
  td {
    padding: 9px 10px;
    font-size: 13px;
  }
}