:root {
      --text: #1a1a1a;
      --bg: #ffffff;
      --muted: #555;
      --line: #e0e0e0;
    }
    * { box-sizing: border-box; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
      line-height: 1.7;
      font-size: 17px;
      padding: 0;
    }
    article {
      max-width: 760px;
      margin: 0 auto;
      padding: 2rem 1rem 4rem;
    }
    h1 {
      font-size: 2rem;
      line-height: 1.25;
      margin-top: 0;
      margin-bottom: 1.5rem;
    }
    h2 {
      font-size: 1.4rem;
      margin-top: 2.25rem;
      margin-bottom: 0.75rem;
      line-height: 1.3;
      border-bottom: 1px solid var(--line);
      padding-bottom: 0.35rem;
    }
    p {
      margin: 1rem 0;
    }
    ul, ol {
      margin: 1rem 0;
      padding-left: 1.5rem;
    }
    li {
      margin: 0.5rem 0;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(255, 255, 255, 0.95);
      -webkit-backdrop-filter: saturate(180%) blur(12px);
      backdrop-filter: saturate(180%) blur(12px);
      border-bottom: 1px solid var(--line);
    }
    .header-inner {
      max-width: 1000px;
      margin: 0 auto;
      padding: 0.65rem 1rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .home-link {
      display: flex;
      align-items: baseline;
      gap: 0.55rem;
      font-size: 1.15rem;
      font-weight: 800;
      letter-spacing: -0.01em;
      color: #326599;
      white-space: nowrap;
    }
    .home-link {
  text-decoration: none;
}

.home-link:hover {
  text-decoration: none;
}
    .home-link .dot { color: #c0392b; }
    .crumb-sep { color: #aaa; font-weight: 400; }
    .topic { color: var(--muted); font-weight: 600; font-size: 0.95rem; }
    .page-search {
      display: flex;
      align-items: center;
      gap: 0.35rem;
    }
    .page-search input {
      font: inherit;
      font-size: 0.92rem;
      padding: 0.42rem 0.7rem;
      width: 210px;
      border: 1.5px solid var(--line);
      border-radius: 6px;
      outline: none;
      background: var(--bg);
    }
    .page-search input:focus { border-color: #326599; }
    .icon-btn {
      font: inherit;
      border: 1px solid var(--line);
      background: var(--bg);
      border-radius: 6px;
      width: 32px;
      height: 32px;
      line-height: 1;
      cursor: pointer;
      color: var(--muted);
    }
    .icon-btn:hover { border-color: #326599; color: #326599; }
    .match-count {
      font-size: 0.82rem;
      color: var(--muted);
      min-width: 2.4rem;
      text-align: center;
      white-space: nowrap;
    }
    .hidden { display: none !important; }
    mark.hit {
      background: #ffe27a;
      color: inherit;
      padding: 0 1px;
      border-radius: 2px;
    }
    mark.hit.active { background: #ffab3d; }
    @media (max-width: 700px) {
      .page-search input { width: 140px; }
      .home-link .topic { display: none; }
      .home-link .crumb-sep { display: none; }
    }