:root {
  color-scheme: light;
  --bg: #f4f7fb;
  --paper: #ffffff;
  --ink: #17202c;
  --muted: #627086;
  --line: #dbe3ef;
  --accent: #137c72;
  --accent-soft: #e4f4f1;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 18px;
}

body {
  margin: 0;
  background:
    linear-gradient(120deg, rgba(19, 124, 114, 0.08), transparent 42%),
    linear-gradient(280deg, rgba(217, 119, 6, 0.08), transparent 38%),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}

.doc-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 36px 0 56px;
}

.doc-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.doc-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  text-decoration: none;
}

.doc-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 18px 40px rgba(31, 43, 62, 0.12);
  padding: 34px;
}

.doc-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.doc-sidebar {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 12px 26px rgba(31, 43, 62, 0.08);
  padding: 16px;
}

.doc-sidebar p {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 900;
}

.doc-sidebar ol {
  display: grid;
  gap: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.doc-sidebar li {
  margin: 0;
}

.doc-sidebar a {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.35;
  text-decoration: none;
}

.doc-sidebar a:hover,
.doc-sidebar a:focus-visible {
  background: var(--accent-soft);
  color: var(--accent);
}

.doc-sidebar .is-sub a {
  padding-left: 18px;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 650;
}

h1,
h2,
h3 {
  line-height: 1.22;
  letter-spacing: 0;
}

h1 {
  margin: 0 0 24px;
  font-size: 2.5rem;
}

h2 {
  margin: 34px 0 12px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 1.5rem;
}

h3 {
  margin: 24px 0 8px;
  font-size: 1.08rem;
}

p {
  margin: 10px 0;
}

ul,
ol {
  margin: 10px 0 16px;
  padding-left: 1.4rem;
}

li {
  margin: 6px 0;
}

blockquote {
  margin: 14px 0;
  padding: 12px 16px;
  border-left: 4px solid var(--accent);
  border-radius: 0 8px 8px 0;
  background: var(--accent-soft);
  color: #153f3b;
  font-weight: 800;
}

code {
  padding: 0.12em 0.34em;
  border-radius: 5px;
  background: #eef3f8;
  color: #1d2a38;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-size: 0.92em;
}

a {
  color: var(--accent);
  font-weight: 700;
}

.doc-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.doc-list a {
  display: block;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
  color: var(--ink);
  text-decoration: none;
}

.doc-list strong {
  display: block;
  color: var(--accent);
  font-size: 1.05rem;
}

.doc-list span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
}

@media (max-width: 900px) {
  .doc-layout {
    grid-template-columns: 1fr;
  }

  .doc-sidebar {
    position: static;
    max-height: none;
  }
}

@media (max-width: 620px) {
  .doc-shell {
    width: min(100% - 20px, 1180px);
    padding: 18px 0 32px;
  }

  .doc-card {
    padding: 22px;
  }

  h1 {
    font-size: 2rem;
  }
}