/* ============================================================
   核心体系知识库 · 阅读器样式
   ============================================================ */
.kb-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr) 230px;
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
  align-items: start;
}

/* 左侧文档导航 */
.kb-side {
  position: sticky; top: 68px;
  height: calc(100vh - 68px);
  overflow-y: auto;
  padding: 22px 14px 40px;
  border-right: 1px solid var(--line);
  background: #fff;
}
.kb-side-home {
  display: block; font-size: 13px; font-weight: 700; color: var(--brand-blue);
  padding: 8px 12px; margin-bottom: 14px; border-radius: 10px; background: var(--brand-blue-light);
}
.kb-side-label { font-size: 11.5px; font-weight: 700; color: var(--ink-400); letter-spacing: .5px; padding: 0 12px 8px; }
.kb-side a {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px; border-radius: 10px; font-size: 13px; color: var(--ink-700);
  margin-bottom: 2px; transition: all .15s;
}
.kb-side a:hover { background: var(--bg-soft); }
.kb-side a.on { background: var(--brand-blue-light); color: var(--brand-blue-dark); font-weight: 700; }
.kb-side .dnum {
  flex: none; width: 30px; height: 22px; border-radius: 6px; background: var(--bg-soft);
  color: var(--ink-500); font-size: 11px; font-weight: 800; display: grid; place-items: center;
}
.kb-side a.on .dnum { background: var(--brand-blue); color: #fff; }
.kb-side .dtitle { line-height: 1.3; }

/* 主内容 */
.kb-main { padding: 24px 40px 60px; min-width: 0; }
.kb-breadcrumb { font-size: 13px; color: var(--ink-400); margin-bottom: 16px; }
.kb-breadcrumb a { color: var(--brand-blue); }
.kb-breadcrumb span { margin: 0 6px; }

.kb-doc { background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 34px 40px; box-shadow: var(--shadow-sm); }
.kb-doc-meta { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 22px; padding-bottom: 18px; border-bottom: 1px solid var(--line); }

/* markdown 渲染样式 */
.kb-doc h1 { font-size: 26px; font-weight: 800; margin: 8px 0 20px; line-height: 1.3; }
.kb-doc h2 {
  font-size: 20px; font-weight: 800; margin: 32px 0 14px; padding-top: 14px;
  border-top: 2px solid var(--bg-soft);
}
.kb-doc h3 { font-size: 16px; font-weight: 700; margin: 22px 0 10px; color: var(--brand-blue-dark); }
.kb-doc p { font-size: 14.5px; color: var(--ink-700); margin: 10px 0; line-height: 1.85; }
.kb-doc ul, .kb-doc ol { margin: 10px 0 10px 24px; font-size: 14.5px; color: var(--ink-700); }
.kb-doc li { margin: 5px 0; line-height: 1.7; }
.kb-doc blockquote {
  border-left: 4px solid var(--brand-orange); background: var(--brand-orange-light);
  padding: 14px 18px; margin: 16px 0; border-radius: 0 12px 12px 0; color: var(--brand-orange-dark);
  font-size: 14px; line-height: 1.8;
}
.kb-doc blockquote p { color: inherit; margin: 0; }
.kb-doc strong { color: var(--ink-900); font-weight: 700; }
.kb-doc hr { border: none; border-top: 1px solid var(--line); margin: 24px 0; }
.kb-doc code {
  background: var(--bg-soft); padding: 2px 6px; border-radius: 6px; font-size: 13px;
  font-family: "SF Mono", Consolas, monospace; color: var(--brand-blue-dark);
}
.kb-doc pre {
  background: #0F1830; color: #D7E3FF; padding: 18px 20px; border-radius: 12px;
  overflow-x: auto; margin: 16px 0; font-size: 12.5px; line-height: 1.6;
}
.kb-doc pre code { background: none; color: inherit; padding: 0; }
.kb-doc table {
  width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 13.5px;
  box-shadow: var(--shadow-sm); border-radius: 10px; overflow: hidden;
}
.kb-doc th, .kb-doc td { border: 1px solid var(--line); padding: 10px 13px; text-align: left; vertical-align: top; }
.kb-doc th { background: var(--brand-blue-light); color: var(--brand-blue-dark); font-weight: 700; }
.kb-doc tr:nth-child(even) td { background: var(--bg-soft); }
.kb-doc a { color: var(--brand-blue); text-decoration: underline; text-underline-offset: 2px; }

/* 上下篇导航 */
.kb-pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 30px; }
.kb-pager .pnav {
  flex: 1; border: 1px solid var(--line); border-radius: 14px; padding: 14px 18px;
  background: #fff; transition: all .2s; max-width: 48%;
}
.kb-pager .pnav.right { text-align: right; }
.kb-pager .pnav:hover { border-color: var(--brand-blue); box-shadow: var(--shadow-sm); }
.kb-pager .pnav span { font-size: 12px; color: var(--ink-400); }
.kb-pager .pnav b { display: block; font-size: 15px; color: var(--brand-blue); margin-top: 4px; }
.kb-pager .pnav.disabled { visibility: hidden; }

/* 右侧目录 */
.kb-toc { position: sticky; top: 68px; padding: 22px 16px; height: calc(100vh - 68px); overflow-y: auto; }
.kb-toc .toc-title { font-size: 12px; font-weight: 700; color: var(--ink-400); letter-spacing: .5px; margin-bottom: 10px; }
.kb-toc ul { list-style: none; border-left: 2px solid var(--line); }
.kb-toc li a { display: block; font-size: 12.5px; color: var(--ink-500); padding: 5px 0 5px 14px; margin-left: -2px; border-left: 2px solid transparent; line-height: 1.4; }
.kb-toc li a:hover { color: var(--brand-blue); }
.kb-toc li a.active { color: var(--brand-blue); border-left-color: var(--brand-blue); font-weight: 700; }
.kb-toc li.lvl-3 a { padding-left: 28px; font-size: 12px; }

/* 知识库首页卡片 */
.kb-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.kb-card {
  background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 20px;
  box-shadow: var(--shadow-sm); transition: all .22s; display: flex; flex-direction: column;
}
.kb-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: transparent; }
.kb-card-num { font-size: 12px; font-weight: 800; color: var(--brand-blue); letter-spacing: 1px; }
.kb-card-title { font-size: 18px; font-weight: 800; margin: 6px 0 8px; }
.kb-card-short { font-size: 13px; color: var(--ink-500); flex: 1; line-height: 1.6; }
.kb-card-aud { font-size: 12px; color: var(--ink-400); margin: 10px 0 14px; }
.kb-card-go { font-size: 13px; font-weight: 700; color: var(--brand-blue); }

/* 响应式 */
@media (max-width: 1180px) {
  .kb-layout { grid-template-columns: 230px minmax(0,1fr); }
  .kb-toc { display: none; }
}
@media (max-width: 820px) {
  .kb-layout { grid-template-columns: 1fr; }
  .kb-side { display: none; }
  .kb-main { padding: 18px; }
  .kb-doc { padding: 22px 18px; }
}