:root {
  color-scheme: light;
  --ink: #1f2328;
  --muted: #59636e;
  --line: #d8dee4;
  --surface: #f6f8fa;
  --accent: #0969da;
  --warning: #8a4600;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

a {
  color: var(--accent);
  overflow-wrap: anywhere;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: #ffffff;
}

.site-header__inner,
main,
.site-footer__inner {
  width: min(100% - 32px, 920px);
  margin: 0 auto;
}

.site-header__inner {
  padding: 28px 0 22px;
}

.brand {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--accent);
}

h1 {
  margin: 0;
  font-size: 30px;
  line-height: 1.35;
}

.meta {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.document-nav {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.document-nav__inner {
  display: flex;
  width: min(100% - 32px, 920px);
  margin: 0 auto;
  gap: 20px;
  padding: 11px 0;
  overflow-x: auto;
  white-space: nowrap;
}

.document-nav a {
  color: var(--ink);
  font-size: 14px;
  text-decoration: none;
}

.document-nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 700;
}

main {
  padding: 32px 0 56px;
}

.notice {
  margin: 0 0 30px;
  padding: 15px 18px;
  border-left: 4px solid var(--accent);
  background: var(--surface);
}

.notice--warning {
  border-left-color: var(--warning);
}

.notice p {
  margin: 0;
}

.toc {
  margin: 0 0 34px;
  padding: 18px 20px;
  background: var(--surface);
}

.toc strong {
  display: block;
  margin-bottom: 8px;
}

.toc ol {
  margin: 0;
  padding-left: 24px;
  columns: 2;
}

.toc li {
  break-inside: avoid;
  margin: 3px 0;
}

section {
  margin-top: 38px;
  scroll-margin-top: 18px;
}

h2 {
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
  font-size: 22px;
  line-height: 1.45;
}

h3 {
  margin: 24px 0 8px;
  font-size: 17px;
  line-height: 1.55;
}

p,
ul,
ol {
  margin: 10px 0;
}

ul,
ol {
  padding-left: 26px;
}

li + li {
  margin-top: 6px;
}

table {
  width: 100%;
  margin: 16px 0 22px;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 11px 12px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

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

.table-wrap {
  overflow-x: auto;
}

.table-wrap table {
  min-width: 720px;
}

.contact-list {
  padding-left: 0;
  list-style: none;
}

.contact-list li {
  margin: 6px 0;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--surface);
  color: var(--muted);
}

.site-footer__inner {
  padding: 22px 0;
  font-size: 13px;
}

@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 25px;
  }

  h2 {
    font-size: 20px;
  }

  .site-header__inner,
  main,
  .site-footer__inner,
  .document-nav__inner {
    width: min(100% - 24px, 920px);
  }

  .toc ol {
    columns: 1;
  }
}