* { box-sizing: border-box; }
body {
  margin: 0;
  color: #1f2937;
  background: #f6f8fb;
  font-family: "Microsoft YaHei", Arial, sans-serif;
  line-height: 1.78;
}
a { color: #1d4ed8; text-decoration: none; }
a:hover { color: #0f766e; }
.top-nav-ad { min-height: 0; }
.blog-header {
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}
.blog-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 16px 24px;
}
.blog-logo {
  color: #111827;
  font-size: 25px;
  font-weight: 800;
  white-space: nowrap;
}
.blog-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px;
  font-size: 15px;
}
.blog-nav a { color: #334155; }
.blog-intro {
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 24px 24px;
}
.blog-intro h1 {
  margin: 0 0 8px;
  font-size: 30px;
  line-height: 1.3;
}
.blog-intro p {
  max-width: 760px;
  margin: 0;
  color: #64748b;
}
.blog-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 22px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px;
}
.blog-main, .blog-sidebar section, .article-body {
  background: #fff;
  border: 1px solid #e5e7eb;
}
.block-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid #e5e7eb;
}
.block-head h2 {
  margin: 0;
  font-size: 22px;
}
.block-head span {
  color: #64748b;
  font-size: 14px;
}
.post-list { padding: 0 18px 8px; }
.post-card {
  padding: 18px 0;
  border-bottom: 1px solid #edf2f7;
}
.post-card:last-child { border-bottom: 0; }
.post-card h2 {
  margin: 0 0 8px;
  font-size: 22px;
  line-height: 1.42;
}
.post-card p {
  margin: 0 0 8px;
  color: #4b5563;
}
.post-meta, .breadcrumb, time {
  color: #64748b;
  font-size: 14px;
}
.breadcrumb {
  margin: 0;
  padding: 12px 18px;
  border-bottom: 1px solid #e5e7eb;
}
.blog-sidebar {
  display: grid;
  align-content: start;
  gap: 16px;
}
.blog-sidebar section { padding: 16px; }
.blog-sidebar h2 {
  margin: 0 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid #e5e7eb;
  font-size: 18px;
}
.category-list {
  display: grid;
  gap: 8px;
}
.category-list a {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 0;
  border-bottom: 1px dashed #e5e7eb;
  color: #1f2937;
}
.category-list em {
  color: #94a3b8;
  font-style: normal;
  font-size: 13px;
}
.keyword-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.keyword-tags span {
  padding: 3px 10px;
  border: 1px solid #dbeafe;
  background: #eff6ff;
  color: #1d4ed8;
  font-size: 13px;
}
.related ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
.related li {
  padding: 8px 0;
  border-bottom: 1px dashed #e5e7eb;
}
.article-body {
  padding: 28px 32px 34px;
}
.article-body h1 {
  margin: 0 0 12px;
  font-size: 32px;
  line-height: 1.35;
}
.content {
  margin-top: 24px;
  font-size: 18px;
  color: #253244;
}
.content p { margin: 0 0 18px; }
.content img {
  width: 100%;
  max-height: 460px;
  object-fit: cover;
  border: 1px solid #e5e7eb;
}
.prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid #e5e7eb;
}
.prev-next a {
  min-height: 76px;
  padding: 12px;
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  color: #1f2937;
}
.prev-next span {
  display: block;
  color: #64748b;
  font-size: 13px;
  font-weight: 700;
}
.pagination {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px;
  border-top: 1px solid #e5e7eb;
}
.pagination a,
.pagination span {
  min-width: 34px;
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 4px 10px;
  border: 1px solid #dbe2ea;
  background: #fff;
}
.pagination span {
  background: #1d4ed8;
  border-color: #1d4ed8;
  color: #fff;
}
.error-layout {
  align-items: start;
}
.error-page {
  padding: 48px 36px;
  text-align: center;
}
.error-page h1 {
  margin: 0;
  color: #1d4ed8;
  font-size: 72px;
  line-height: 1;
}
.error-page h2 {
  margin: 14px 0 8px;
  font-size: 26px;
}
.error-page p {
  color: #64748b;
}
.button-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 38px;
  padding: 6px 18px;
  background: #1d4ed8;
  color: #fff;
}
.button-link:hover {
  color: #fff;
  background: #0f766e;
}
footer {
  margin-top: 24px;
  padding: 24px;
  text-align: center;
  color: #64748b;
  background: #fff;
  border-top: 1px solid #e5e7eb;
}
@media (max-width: 860px) {
  .blog-top { display: block; padding: 14px 16px; }
  .blog-nav { justify-content: flex-start; margin-top: 10px; }
  .blog-intro, .blog-layout { padding: 16px; }
  .blog-layout, .prev-next { grid-template-columns: 1fr; }
  .article-body { padding: 22px; }
  .article-body h1, .blog-intro h1 { font-size: 26px; }
}