:root {
  --primary: #1e3a6e;
  --accent: #e04a35;
  --bg: #f7f4ef;
  --text: #1a1f2e;
  --muted: #6b7280;
  --border: #e6e1da;
  --font-body: "PingFang SC", "Noto Sans SC", "Hiragino Sans GB", sans-serif;
}

* {
  box-sizing: border-box;
}

body.doc {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.doc-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem clamp(1rem, 4vw, 2rem);
  border-bottom: 1px solid var(--border);
  background: rgba(247, 244, 239, 0.92);
  position: sticky;
  top: 0;
}

.doc-top__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
}

.doc-top__brand img {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.doc-top > a {
  color: var(--primary);
  font-weight: 500;
}

.doc-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 2rem clamp(1rem, 4vw, 1.5rem) 3.5rem;
}

.doc-main h1 {
  margin: 0 0 0.35em;
  color: var(--primary);
  font-size: 1.7rem;
}

.doc-main h2 {
  margin: 1.6em 0 0.45em;
  font-size: 1.08rem;
  color: var(--text);
}

.doc-main p,
.doc-main li {
  color: var(--muted);
  margin: 0.4em 0;
}

.doc-main .meta {
  margin-bottom: 1.3em;
  font-size: 0.92rem;
}

.doc-main ul {
  padding-left: 1.2rem;
}

.doc-main strong {
  color: var(--text);
}