:root {
  color-scheme: light;
  --text: #242424;
  --muted: #737373;
  --line: #e6e6e6;
  --soft: #f6f6f4;
  --link: #0b6e99;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.82;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10;
  padding: 7px 12px;
  color: #fff;
  background: #222;
  border-radius: 4px;
  transform: translateY(-160%);
}

.skip-link:focus {
  transform: none;
}

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

.doc-nav-inner {
  width: min(calc(100% - 40px), 780px);
  margin: 0 auto;
  padding: 18px 0;
}

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

.doc-nav a:hover,
.doc-nav a:focus-visible {
  color: var(--text);
  text-decoration: underline;
}

.doc-shell {
  width: min(calc(100% - 40px), 780px);
  margin: 0 auto;
  padding: 76px 0 110px;
}

.doc-header {
  margin-bottom: 64px;
}

.doc-header h1 {
  max-width: 760px;
  margin: 0 0 24px;
  color: #171717;
  font-size: clamp(42px, 7vw, 64px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.16;
}

.doc-subtitle {
  margin: 0 0 18px;
  color: #555;
  font-size: 20px;
}

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px 18px;
  color: var(--muted);
  font-size: 14px;
}

.doc-body h2 {
  scroll-margin-top: 32px;
  margin: 64px 0 22px;
  color: #171717;
  font-size: 30px;
  font-weight: 720;
  letter-spacing: -0.025em;
  line-height: 1.35;
}

.doc-body h3 {
  scroll-margin-top: 32px;
  margin: 44px 0 16px;
  color: #202020;
  font-size: 23px;
  font-weight: 700;
  line-height: 1.45;
}

.doc-body p {
  margin: 0 0 24px;
}

.doc-body .lead {
  color: #303030;
  font-size: 20px;
}

.doc-body strong {
  color: #171717;
}

.doc-body blockquote {
  margin: 28px 0;
  padding: 2px 0 2px 22px;
  border-left: 3px solid #b8b8b8;
  color: #444;
  font-size: 18px;
}

.doc-body blockquote p {
  margin: 0;
}

.doc-body pre {
  overflow-x: auto;
  margin: 26px 0;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.7;
  white-space: pre-wrap;
}

.doc-body ul,
.doc-body ol {
  margin: 0 0 26px;
  padding-left: 28px;
}

.doc-body li {
  margin-bottom: 8px;
}

.table-wrap {
  overflow-x: auto;
  margin: 28px 0 30px;
  border: 1px solid var(--line);
  border-radius: 5px;
}

table {
  width: 100%;
  min-width: 620px;
  border-collapse: collapse;
  font-size: 15px;
  line-height: 1.65;
}

th,
td {
  padding: 13px 15px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: #353535;
  background: var(--soft);
  font-weight: 650;
}

td:first-child {
  width: 132px;
  color: #303030;
  font-weight: 650;
}

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

.sources {
  margin-top: 68px;
  padding-top: 4px;
  border-top: 1px solid var(--line);
}

.sources h2 {
  font-size: 24px;
}

.sources li {
  color: #555;
  font-size: 15px;
}

.doc-footer {
  padding: 30px 0 48px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.doc-footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(calc(100% - 40px), 780px);
  margin: 0 auto;
}

.doc-footer a {
  color: var(--muted);
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  .doc-nav-inner,
  .doc-shell,
  .doc-footer-inner {
    width: min(calc(100% - 30px), 780px);
  }

  .doc-shell {
    padding: 48px 0 78px;
  }

  .doc-header {
    margin-bottom: 48px;
  }

  .doc-header h1 {
    font-size: 40px;
  }

  .doc-subtitle,
  .doc-body .lead {
    font-size: 18px;
  }

  .doc-body h2 {
    margin-top: 52px;
    font-size: 27px;
  }

  .doc-body h3 {
    margin-top: 38px;
    font-size: 21px;
  }

  .doc-body blockquote {
    padding-left: 17px;
  }

  .doc-footer-inner {
    flex-direction: column;
  }
}

@media print {
  .doc-nav,
  .doc-footer {
    display: none;
  }

  .doc-shell {
    width: 100%;
    padding: 0;
  }
}