/* 博客文章页与列表页共享样式 —— 与主站配色保持一致 */
:root {
  --brand: #3b82f6;
  --brand-dark: #2563eb;
  --text: #1f2937;
  --text-muted: #6b7280;
  --text-faint: #9ca3af;
  --bg: #f9fafb;
  --card: #ffffff;
  --border: #e5e7eb;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--brand); text-decoration: none; }
a:hover { color: var(--brand-dark); text-decoration: underline; }

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* 顶部导航 */
.nav {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 14px;
  margin-bottom: 24px;
}
.nav a { color: var(--text-muted); }
.nav a:hover { color: var(--brand); }
.nav .sep { color: var(--text-faint); }

/* 文章头部 */
.article-header { margin-bottom: 28px; }
.article-header h1 {
  font-size: 30px;
  line-height: 1.3;
  margin: 0 0 12px;
  color: var(--text);
}
.meta {
  font-size: 13px;
  color: var(--text-faint);
}

/* 正文 */
article h2 {
  font-size: 22px;
  margin: 32px 0 12px;
  color: var(--text);
}
article h3 {
  font-size: 18px;
  margin: 24px 0 10px;
}
article p { margin: 0 0 16px; }
article ul, article ol { padding-left: 22px; margin: 0 0 16px; }
article li { margin-bottom: 6px; }
article img { max-width: 100%; height: auto; border-radius: 8px; }
article blockquote {
  border-left: 3px solid var(--brand);
  margin: 18px 0;
  padding: 4px 16px;
  color: var(--text-muted);
  background: #f3f4f6;
  border-radius: 0 6px 6px 0;
}
article code {
  background: #f3f4f6;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.92em;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}
.callout {
  background: #eff6ff;
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  padding: 14px 16px;
  margin: 20px 0;
  font-size: 14px;
  color: #1e40af;
}

/* 文末相关阅读 */
.related {
  margin-top: 40px;
  padding: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.related h2 { font-size: 18px; margin-top: 0; }
.related ul { margin-bottom: 0; }

/* 页脚 */
.site-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  font-size: 14px;
  color: var(--text-faint);
}

/* 列表页 */
.blog-list h1 { font-size: 28px; margin: 0 0 8px; }
.blog-list .lead { color: var(--text-muted); margin: 0 0 24px; }
.post-card {
  display: block;
  padding: 18px 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 14px;
  transition: border-color .15s, box-shadow .15s;
}
.post-card:hover {
  text-decoration: none;
  border-color: var(--brand);
  box-shadow: 0 4px 12px rgba(59,130,246,.08);
}
.post-card h2 { margin: 0 0 6px; font-size: 18px; color: var(--text); }
.post-card p { margin: 0; color: var(--text-muted); font-size: 14px; }
.post-card .tag { color: var(--brand); font-size: 12px; margin-right: 8px; }

.cta {
  margin-top: 32px;
  padding: 24px;
  background: linear-gradient(135deg, #eff6ff, #dbeafe);
  border-radius: 12px;
  text-align: center;
}
.cta h2 { margin: 0 0 8px; font-size: 20px; }
.cta p { margin: 0 0 16px; color: var(--text-muted); font-size: 14px; }
.btn {
  display: inline-block;
  padding: 10px 22px;
  background: var(--brand);
  color: #fff !important;
  border-radius: 8px;
  font-weight: 600;
}
.btn:hover { background: var(--brand-dark); text-decoration: none; }