:root {
  color-scheme: light;
  --ink: #18212f;
  --muted: #667085;
  --line: #d8dee8;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --accent: #0b7fab;
  --accent-2: #b8325f;
  --code: #111827;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--soft);
}
a { color: inherit; text-decoration: none; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 36px;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}
.brand { font-weight: 800; font-size: 20px; letter-spacing: 0; }
.site-header nav { display: flex; gap: 22px; color: var(--muted); font-size: 14px; }
.site-header nav a:hover { color: var(--accent); }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 40px;
  max-width: 1180px;
  min-height: 390px;
  margin: 0 auto;
  padding: 54px 36px 42px;
}
.hero-copy h1 {
  margin: 0;
  font-size: 58px;
  line-height: 1.04;
  letter-spacing: 0;
}
.eyebrow {
  margin: 0 0 16px;
  color: var(--accent-2);
  font-weight: 700;
}
.lead {
  max-width: 720px;
  margin: 20px 0 0;
  color: #3b4658;
  font-size: 19px;
  line-height: 1.8;
}
.hero-stats { display: flex; gap: 26px; margin-top: 28px; color: var(--muted); }
.hero-stats strong { color: var(--ink); font-size: 28px; margin-right: 4px; }
.hero-avatar {
  width: 180px;
  height: 180px;
  object-fit: cover;
  border-radius: 8px;
  border: 1px solid var(--line);
}
.workbench {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 28px;
  max-width: 1180px;
  margin: 0 auto 72px;
  padding: 0 36px;
  align-items: start;
}
.filters {
  position: sticky;
  top: 84px;
  padding: 18px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.search span, .recent h2, .toc h2, .article-related h2 {
  display: block;
  margin: 0 0 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}
.search input {
  width: 100%;
  height: 42px;
  padding: 0 12px;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 15px;
}
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 16px 0 22px; }
.chip {
  height: 32px;
  padding: 0 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: #3b4658;
  cursor: pointer;
}
.chip.active { color: #fff; background: var(--accent); border-color: var(--accent); }
.recent { display: grid; gap: 10px; }
.recent a {
  display: grid;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}
.recent span { font-size: 14px; line-height: 1.45; }
.recent small { color: var(--muted); }
.article-list { min-width: 0; }
.list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.list-head h2 { margin: 0; font-size: 24px; }
#resultCount {
  min-width: 40px;
  height: 28px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--muted);
}
.cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}
.post-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease;
}
.post-card:hover {
  transform: translateY(-2px);
  border-color: rgba(11,127,171,.45);
  box-shadow: 0 16px 38px rgba(24,33,47,.08);
}
.post-card a {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  min-height: 168px;
}
.post-thumb {
  position: relative;
  width: 100%;
  min-height: 168px;
  background: #e8eef5;
  border-left: 1px solid var(--line);
  overflow: hidden;
}
.post-thumb img {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #fff;
  z-index: 1;
}
.thumb-fallback {
  display: grid;
  width: 100%;
  height: 100%;
  place-items: center;
  padding: 20px;
  color: #405169;
  background:
    linear-gradient(135deg, rgba(11,127,171,.13), rgba(184,50,95,.12)),
    #eef3f8;
}
.thumb-fallback span {
  font-weight: 800;
  font-size: 17px;
  text-align: center;
}
.post-card-body {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 18px 20px;
}
.meta { display: flex; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 13px; }
.meta span:first-child { color: var(--accent); font-weight: 700; }
.post-card h3 {
  margin: 12px 0 10px;
  font-size: 20px;
  line-height: 1.35;
}
.post-card p {
  margin: 0;
  color: #536072;
  line-height: 1.7;
  display: -webkit-box;
  overflow: hidden;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.post-card small { margin-top: auto; color: var(--muted); padding-top: 14px; }
.article-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 820px) 220px;
  gap: 28px;
  max-width: 1320px;
  margin: 0 auto;
  padding: 32px 28px 72px;
  align-items: start;
}
.article-aside, .article-related {
  position: sticky;
  top: 88px;
  display: grid;
  gap: 18px;
  color: var(--muted);
}
.back-link {
  color: var(--accent);
  font-weight: 700;
}
.toc, .article-related {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}
.toc a, .article-related a {
  display: block;
  padding: 7px 0;
  font-size: 14px;
  line-height: 1.45;
  border-top: 1px solid rgba(216,222,232,.7);
}
.toc-level-3 { padding-left: 12px !important; }
.article {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 8px;
}
.article-title {
  padding: 36px 42px 20px;
  border-bottom: 1px solid var(--line);
}
.article-title h1 {
  margin: 16px 0;
  font-size: 40px;
  line-height: 1.18;
  letter-spacing: 0;
}
.article-title p { margin: 0; color: #536072; line-height: 1.8; }
.prose {
  padding: 32px 42px 44px;
  font-size: 16px;
  line-height: 1.86;
}
.prose h1, .prose h2, .prose h3, .prose h4 {
  margin: 32px 0 12px;
  line-height: 1.3;
  letter-spacing: 0;
}
.prose h1 { font-size: 30px; }
.prose h2 { font-size: 25px; }
.prose h3 { font-size: 21px; }
.prose p { margin: 14px 0; }
.prose a { color: var(--accent); border-bottom: 1px solid rgba(11,127,171,.25); }
.prose img {
  display: block;
  max-width: 100%;
  height: auto;
  margin: 22px auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
}
.missing-image {
  display: block;
  margin: 18px 0;
  padding: 14px 16px;
  border: 1px dashed #b8c4d4;
  border-radius: 6px;
  background: #f8fafc;
  color: #64748b;
  font-size: 14px;
}
.prose pre {
  overflow: auto;
  padding: 16px;
  background: var(--code);
  color: #e5edf7;
  border-radius: 6px;
  line-height: 1.6;
}
.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: .92em;
}
.prose p code, .prose li code {
  padding: 2px 5px;
  background: #eef3f8;
  color: #28364a;
  border-radius: 4px;
}
.prose blockquote {
  margin: 18px 0;
  padding: 2px 0 2px 16px;
  border-left: 4px solid var(--accent);
  color: #4b586a;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14px;
}
.prose th, .prose td {
  padding: 10px 12px;
  border: 1px solid var(--line);
  vertical-align: top;
}
.prose th { background: #eef3f8; text-align: left; }
.short-note {
  padding: 24px 0 26px;
  border-top: 1px solid var(--line);
}
.short-note:first-child {
  padding-top: 0;
  border-top: 0;
}
.short-note h2 {
  margin-top: 0;
}
.short-note .meta {
  margin: -4px 0 12px;
}
.prev-next {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border-top: 1px solid var(--line);
  background: var(--line);
}
.prev-next a {
  display: grid;
  gap: 6px;
  padding: 18px;
  background: var(--paper);
}
.prev-next small { color: var(--muted); }
.prev-next span { font-weight: 700; line-height: 1.45; }
@media (max-width: 1080px) {
  .article-layout { grid-template-columns: minmax(0, 1fr); }
  .article-aside, .article-related { position: static; }
  .toc { display: none; }
}
@media (max-width: 860px) {
  .site-header { padding: 0 18px; }
  .site-header nav { gap: 14px; }
  .hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 36px 20px 28px;
  }
  .hero-copy h1 { font-size: 40px; }
  .hero-avatar { width: 120px; height: 120px; }
  .workbench { grid-template-columns: 1fr; padding: 0 20px 48px; }
  .filters { position: static; }
  .post-card a {
    grid-template-columns: minmax(0, 1fr) 116px;
    min-height: 132px;
  }
  .post-thumb { min-height: 132px; }
  .post-card-body { padding: 14px 14px 15px; }
  .post-card h3 { font-size: 17px; }
  .post-card p { -webkit-line-clamp: 1; }
  .thumb-fallback { padding: 10px; }
  .thumb-fallback span { font-size: 14px; }
  .article-layout { padding: 20px 14px 48px; }
  .article-title { padding: 26px 20px 18px; }
  .article-title h1 { font-size: 30px; }
  .prose { padding: 22px 20px 32px; }
  .prev-next { grid-template-columns: 1fr; }
}