:root {
  color-scheme: light;
  --paper: #fffaf0;
  --surface: #fffdf8;
  --soft: #f7ead7;
  --soft-blue: #eaf5f4;
  --soft-mint: #edf7e9;
  --ink: #3f372f;
  --muted: #786c60;
  --line: #eadcc9;
  --accent: #9a6a3f;
  --accent-soft: #fff2d9;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, #fff7e8 0%, #fffdf8 42%, #f4fbf7 100%);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 17px;
  line-height: 1.82;
}

a {
  color: #8b5e34;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.site-header {
  padding: 16px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid rgba(226, 205, 177, 0.72);
  background: rgba(255, 253, 248, 0.92);
}

.home-link {
  display: inline-flex;
  min-height: 36px;
  align-items: center;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  text-decoration: none;
}

.page-shell {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: clamp(18px, 4vw, 48px) clamp(16px, 4vw, 32px) 64px;
}

.article {
  max-width: 820px;
  margin: 0 auto;
}

.article-header {
  padding: 8px 0 22px;
  border-bottom: 1px solid var(--line);
}

.eyebrow,
.source-path,
.summary,
.card-meta {
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 10px;
  font-size: 14px;
  font-weight: 700;
}

h1 {
  margin: 0;
  color: #3d3329;
  font-size: clamp(30px, 7vw, 46px);
  line-height: 1.18;
  letter-spacing: 0;
}

.summary {
  margin: 16px 0 0;
  max-width: 680px;
  font-size: 18px;
}

.source-path {
  margin: 10px 0 0;
  font-size: 14px;
  overflow-wrap: anywhere;
}

.toc {
  margin: 22px 0 28px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--accent-soft);
}

.toc strong {
  display: block;
  margin-bottom: 8px;
  font-size: 15px;
}

.toc a {
  display: block;
  padding: 5px 0;
  color: #6f563d;
  font-size: 15px;
  text-decoration: none;
}

.toc-level-3 {
  padding-left: 16px !important;
}

.content {
  padding-top: 16px;
}

.content h1,
.content h2,
.content h3,
.content h4 {
  color: #4b3d31;
  line-height: 1.32;
  letter-spacing: 0;
}

.content h1 {
  margin: 34px 0 14px;
  font-size: 28px;
}

.content h2 {
  margin: 34px 0 12px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font-size: 25px;
}

.content h3 {
  margin: 26px 0 10px;
  font-size: 21px;
}

.content h4 {
  margin: 22px 0 8px;
  font-size: 18px;
}

.content p,
.content ul,
.content ol,
.content blockquote,
.table-wrap,
pre {
  margin: 0 0 18px;
}

.content ul,
.content ol {
  padding-left: 1.4em;
}

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

blockquote {
  padding: 14px 18px;
  border-left: 4px solid #dab98d;
  border-radius: 0 8px 8px 0;
  background: #fff5e4;
  color: #55483c;
}

code {
  padding: 0.08em 0.34em;
  border-radius: 5px;
  background: #f4eadb;
  color: #5a4532;
  font-size: 0.92em;
}

pre {
  overflow-x: auto;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff8ea;
}

pre code {
  padding: 0;
  background: transparent;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

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

th,
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  text-align: left;
}

th {
  background: #fff1d8;
  color: #4c3c2e;
}

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

.missing-link {
  color: #a06f45;
  border-bottom: 1px dotted #cfa574;
}

.index-hero {
  max-width: 920px;
  margin: 0 auto 26px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.index-hero h1 {
  max-width: 720px;
}

.section-list {
  display: grid;
  gap: 16px;
  max-width: 920px;
  margin: 0 auto;
}

.section-title {
  margin: 30px 0 4px;
  color: #4b3d31;
  font-size: 22px;
}

.card-grid {
  display: grid;
  gap: 12px;
}

.doc-card {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  text-decoration: none;
}

.doc-card:hover {
  background: #fff8eb;
}

.doc-card strong {
  display: block;
  color: #3f372f;
  font-size: 18px;
}

.card-meta {
  display: block;
  margin-top: 4px;
  font-size: 14px;
  overflow-wrap: anywhere;
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
    line-height: 1.78;
  }

  .site-header {
    padding: 12px 16px;
  }

  .page-shell {
    padding: 18px 15px 44px;
  }

  .article-header {
    padding-top: 4px;
  }

  h1 {
    font-size: 30px;
  }

  .summary {
    font-size: 16px;
  }

  .toc {
    padding: 13px 14px;
  }

  .content h2 {
    font-size: 22px;
  }

  .content h3 {
    font-size: 19px;
  }

  table {
    min-width: 560px;
    font-size: 14px;
  }

  th,
  td {
    padding: 9px 10px;
  }
}