:root {
  --bg: #faf9f7;
  --fg: #1c1a17;
  --muted: #6b655c;
  --accent: #7a2e1d;
  --accent-soft: #f3e9e4;
  --border: #ddd6cc;
  --code-bg: #f1eee9;
  --font-size: 17px;
  --content-width: 46rem;
}
[data-theme="dark"] {
  --bg: #171512;
  --fg: #e8e3da;
  --muted: #9a9285;
  --accent: #d18a6a;
  --accent-soft: #2a211c;
  --border: #38322a;
  --code-bg: #23201b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Songti SC", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, "Times New Roman", serif;
  font-size: var(--font-size);
  line-height: 1.85;
  transition: background .2s, color .2s;
}

/* 头部 */
.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  position: sticky; top: 0; z-index: 10;
}
.header-inner {
  max-width: 72rem; margin: 0 auto; padding: .6rem 1rem;
  display: flex; align-items: center; gap: 1.2rem;
}
.site-title { font-weight: 700; text-decoration: none; color: var(--accent); font-size: 1.1em; }
.site-nav { display: flex; gap: 1rem; }
.site-nav a { color: var(--fg); text-decoration: none; }
.site-nav a:hover { color: var(--accent); }
.view-controls { margin-left: auto; display: flex; gap: .3rem; }
.view-controls button {
  background: none; border: 1px solid var(--border); border-radius: 4px;
  color: var(--fg); cursor: pointer; padding: .15rem .5rem; font-size: .85em;
}
.view-controls button:hover { border-color: var(--accent); color: var(--accent); }

.site-main { max-width: 72rem; margin: 0 auto; padding: 1.5rem 1rem 3rem; }
.site-footer {
  border-top: 1px solid var(--border); color: var(--muted);
  text-align: center; padding: 1.2rem; font-size: .85em;
}

/* 首页 */
.home-search { text-align: center; padding: 2.5rem 0 2rem; }
.home-search h1 { margin: 0 0 1.2rem; font-size: 1.6em; }
.search-form { display: flex; max-width: 36rem; margin: 0 auto; gap: .5rem; }
.search-form input {
  flex: 1; padding: .6rem .9rem; font-size: 1em;
  border: 1px solid var(--border); border-radius: 6px; background: var(--bg); color: var(--fg);
  font-family: inherit;
}
.search-form button {
  padding: .6rem 1.4rem; border: none; border-radius: 6px;
  background: var(--accent); color: #fff; cursor: pointer; font-size: 1em;
}
.home-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; margin-top: 1.5rem; }
@media (max-width: 800px) { .home-cols { grid-template-columns: 1fr; } }
.author-list { list-style: none; padding: 0; margin: 0; columns: 2; }
.author-list li { margin-bottom: .3rem; }
.author-list a { color: var(--fg); text-decoration: none; }
.author-list a:hover { color: var(--accent); }
.count { color: var(--muted); font-size: .82em; margin-left: .3em; }
.tag-cloud { line-height: 2.1; }
.tag {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  border-radius: 4px; padding: .05rem .55rem; margin: 0 .25rem .3rem 0;
  text-decoration: none; font-size: .88em; white-space: nowrap;
}
.tag:hover { filter: brightness(1.08); }
.tag .count { margin-left: .25em; font-size: .85em; }
.recent-list { list-style: none; padding: 0; }
.recent-list li { margin-bottom: .3rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.recent-list a { color: var(--fg); text-decoration: none; }
.recent-list a:hover { color: var(--accent); }

/* 列表页（作者区段） */
.section-page h1 { border-bottom: 1px solid var(--border); padding-bottom: .5rem; }
.year-heading { color: var(--accent); margin-top: 1.6rem; font-size: 1.15em; }
.doc-list { list-style: none; padding: 0; }
.doc-list li { margin-bottom: .35rem; }
.doc-list a { color: var(--fg); text-decoration: none; }
.doc-list a:hover { color: var(--accent); }
.doc-author, .doc-year { color: var(--muted); font-size: .88em; }

/* 文档页 */
.doc-header { margin-bottom: 1.5rem; }
.doc-breadcrumb { color: var(--muted); font-size: .88em; margin: 0 0 .4rem; }
.doc-breadcrumb a { color: var(--muted); }
.doc-title { margin: 0 0 .4rem; font-size: 1.7em; line-height: 1.4; }
.doc-meta { color: var(--muted); margin: 0 0 .8rem; }
.doc-tags { display: flex; align-items: center; gap: .3rem; flex-wrap: wrap; }
.tag-edit-btn {
  background: none; border: 1px dashed var(--border); border-radius: 4px;
  color: var(--muted); cursor: pointer; font-size: .8em; padding: .05rem .4rem;
}
.tag-editor { display: inline-flex; gap: .3rem; align-items: center; }
.tag-editor input {
  border: 1px solid var(--border); border-radius: 4px; padding: .2rem .5rem;
  background: var(--bg); color: var(--fg); font-family: inherit; width: 16rem;
}
.tag-editor button {
  border: 1px solid var(--border); border-radius: 4px; background: var(--bg);
  color: var(--fg); cursor: pointer; padding: .15rem .6rem; font-family: inherit;
}
#tag-msg { color: var(--muted); font-size: .85em; }
.doc-body { display: grid; grid-template-columns: 14rem minmax(0, 1fr); gap: 2rem; align-items: start; }
@media (max-width: 900px) { .doc-body { grid-template-columns: 1fr; } .doc-toc { display: none; } }
.doc-toc {
  position: sticky; top: 4.2rem; max-height: calc(100vh - 6rem); overflow: auto;
  font-size: .85em; border-left: 2px solid var(--border); padding-left: .8rem;
}
.doc-toc a { display: block; color: var(--muted); text-decoration: none; padding: .15rem 0; }
.doc-toc a:hover { color: var(--accent); }
.doc-toc .lvl-2 { padding-left: .8rem; }
.doc-toc .lvl-3 { padding-left: 1.6rem; }
.doc-content { max-width: var(--content-width); min-width: 0; }
.doc-content h1, .doc-content h2, .doc-content h3 { line-height: 1.4; scroll-margin-top: 4rem; }
.doc-content h1 { font-size: 1.45em; }
.doc-content h2 { font-size: 1.25em; border-bottom: 1px solid var(--border); padding-bottom: .25rem; }
.doc-content h3 { font-size: 1.1em; }
.doc-content p { margin: .9em 0; text-align: justify; }
.doc-content img { max-width: 100%; height: auto; }
.doc-content table { border-collapse: collapse; margin: 1em 0; font-size: .92em; }
.doc-content th, .doc-content td { border: 1px solid var(--border); padding: .35rem .6rem; }
.doc-content th { background: var(--accent-soft); }
.doc-content blockquote { border-left: 3px solid var(--border); margin: 1em 0; padding: 0 1em; color: var(--muted); }
.doc-content code { background: var(--code-bg); padding: .1em .35em; border-radius: 3px; font-size: .9em; }
.doc-content pre { background: var(--code-bg); padding: .8rem 1rem; border-radius: 6px; overflow: auto; }
.doc-content pre code { background: none; padding: 0; }
.doc-content .footnote-definition { font-size: .9em; color: var(--muted); }
.doc-footer { margin-top: 2.5rem; border-top: 1px solid var(--border); padding-top: 1rem; }
.doc-source { color: var(--muted); font-size: .85em; }
.doc-pager { display: flex; justify-content: space-between; gap: 1rem; margin-top: 1rem; }
.doc-pager a { color: var(--accent); text-decoration: none; max-width: 45%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-pager a:hover { text-decoration: underline; }

/* 搜索页 */
.search-page .search-form { margin: 0 0 1.5rem; }
#search-results { list-style: none; padding: 0; }
#search-results li { margin-bottom: 1.2rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
#search-results .sr-title { font-size: 1.05em; }
#search-results .sr-title a { color: var(--accent); text-decoration: none; }
#search-results .sr-meta { color: var(--muted); font-size: .85em; }
#search-results .sr-snippet { color: var(--fg); font-size: .92em; margin: .3rem 0 0; }
#search-results mark { background: #f5d76e; color: inherit; padding: 0 .15em; }
#search-status { color: var(--muted); }