/* ===== 亿捷技术分享 - 全局样式 ===== */
:root {
  --primary: #2563eb;
  --primary-dark: #1e40af;
  --text: #1f2937;
  --text-muted: #6b7280;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  --border: #e5e7eb;
  --code-bg: #0f172a;
  --code-text: #e2e8f0;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
  font-size: 15px;
}

.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

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

/* ===== Header ===== */
.site-header {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}

.logo { display: flex; align-items: center; gap: 10px; }

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary), #7c3aed);
  color: #fff;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
}

.logo-text { font-size: 18px; font-weight: 700; color: var(--text); }

.main-nav { display: flex; gap: 4px; }
.main-nav a {
  padding: 8px 14px;
  border-radius: 6px;
  color: var(--text-muted);
  font-size: 14px;
}
.main-nav a:hover { color: var(--primary); background: #eff6ff; }
.main-nav a.active { color: var(--primary); font-weight: 600; background: #eff6ff; }

.menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text); }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 60%, #7c3aed 100%);
  border-radius: 12px;
  color: #fff;
  padding: 48px 40px;
  margin: 24px 0 32px;
}
.hero-content h1 { font-size: 32px; margin-bottom: 12px; font-weight: 700; }
.hero-content p { font-size: 16px; opacity: .9; max-width: 640px; }

/* ===== Layout ===== */
.main-layout { padding-bottom: 48px; }
.layout-row { display: grid; grid-template-columns: 1fr 300px; gap: 28px; }

.content-area { min-width: 0; }
.section-title { font-size: 20px; margin-bottom: 16px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); display: inline-block; }

/* ===== Post Card ===== */
.post-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 22px 24px;
  margin-bottom: 18px;
  transition: box-shadow .2s, transform .2s;
}
.post-card:hover { box-shadow: 0 4px 16px rgba(0,0,0,.06); transform: translateY(-2px); }

.post-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; }
.tag {
  background: #eff6ff;
  color: var(--primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 20px;
  font-weight: 600;
}
.date { color: var(--text-muted); font-size: 13px; }
.post-card h3 { font-size: 18px; margin-bottom: 8px; }
.post-card h3 a { color: var(--text); }
.post-card h3 a:hover { color: var(--primary); }
.post-excerpt { color: var(--text-muted); font-size: 14px; margin-bottom: 10px; }
.read-more { font-size: 14px; font-weight: 600; }

/* ===== Pagination ===== */
.pagination { text-align: center; margin-top: 24px; }
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  transition: background .2s;
}
.btn:hover { background: var(--primary-dark); color: #fff; }

/* ===== Sidebar ===== */
.sidebar { min-width: 0; }
.widget {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 18px;
  margin-bottom: 20px;
}
.widget h4 {
  font-size: 15px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.category-list, .hot-list { list-style: none; }
.category-list li { margin-bottom: 8px; }
.category-list a { display: flex; justify-content: space-between; color: var(--text); font-size: 14px; }
.category-list a:hover { color: var(--primary); }
.category-list span { color: var(--text-muted); font-size: 13px; }

.hot-list li { margin-bottom: 10px; font-size: 14px; }
.hot-list a { color: var(--text); }
.hot-list a:hover { color: var(--primary); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 13px;
  color: var(--text);
}
.tag-cloud a:hover { background: #eff6ff; border-color: var(--primary); color: var(--primary); }

/* ===== Article Page ===== */
.article {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 36px;
  max-width: 860px;
  margin: 24px auto;
}
.article-header { margin-bottom: 24px; }
.article-header h1 { font-size: 28px; margin-bottom: 12px; }
.article-meta { display: flex; align-items: center; gap: 12px; color: var(--text-muted); font-size: 13px; flex-wrap: wrap; }
.article-body { font-size: 15.5px; }
.article-body h2 { font-size: 22px; margin: 28px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.article-body h3 { font-size: 18px; margin: 20px 0 10px; }
.article-body p { margin-bottom: 14px; }
.article-body ul, .article-body ol { margin: 0 0 14px 24px; }
.article-body li { margin-bottom: 6px; }
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: #eff6ff;
  padding: 10px 16px;
  margin: 14px 0;
  border-radius: 0 6px 6px 0;
  color: #334155;
}
.article-body img { max-width: 100%; border-radius: 8px; margin: 14px 0; }
.article-body table { width: 100%; border-collapse: collapse; margin: 14px 0; }
.article-body th, .article-body td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; font-size: 14px; }
.article-body th { background: #f1f5f9; }

pre {
  background: var(--code-bg);
  color: var(--code-text);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 14px 0;
  font-size: 13.5px;
  line-height: 1.6;
  font-family: 'SFMono-Regular', Consolas, 'Liberation Mono', Menlo, monospace;
}
pre code { background: none; padding: 0; color: inherit; }
code {
  background: #f1f5f9;
  color: #dc2626;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 13px;
  font-family: 'SFMono-Regular', Consolas, monospace;
}
pre code { background: none; color: inherit; }

.article-nav { margin-top: 32px; padding-top: 16px; border-top: 1px solid var(--border); display: flex; justify-content: space-between; font-size: 14px; }

/* ===== Page (about/contact) ===== */
.page-box {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 36px;
  max-width: 860px;
  margin: 24px auto;
}
.page-box h1 { font-size: 26px; margin-bottom: 16px; }
.page-box h2 { font-size: 20px; margin: 22px 0 12px; }
.page-box p { margin-bottom: 12px; }
.page-box ul { margin: 0 0 14px 24px; }
.page-box li { margin-bottom: 6px; }

.info-table { width: 100%; border-collapse: collapse; margin: 16px 0; }
.info-table th, .info-table td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; font-size: 14px; }
.info-table th { width: 160px; background: #f8fafc; }

/* ===== Categories ===== */
.cat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 24px 0; }
.cat-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  transition: box-shadow .2s;
}
.cat-item:hover { box-shadow: 0 4px 16px rgba(0,0,0,.06); }
.cat-item h3 { font-size: 16px; margin-bottom: 6px; }
.cat-item p { color: var(--text-muted); font-size: 13px; margin-bottom: 8px; }
.cat-item .count { color: var(--primary); font-size: 13px; font-weight: 600; }

/* ===== Footer ===== */
.site-footer { background: #0f172a; color: #94a3b8; margin-top: 40px; }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; padding: 40px 20px; }
.footer-col h5 { color: #fff; font-size: 15px; margin-bottom: 12px; }
.footer-col p { font-size: 13px; line-height: 1.8; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: #94a3b8; font-size: 13px; }
.footer-col a:hover { color: #fff; }
.footer-bottom { border-top: 1px solid #1e293b; padding: 16px 0; font-size: 13px; }
.footer-bottom .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.footer-bottom a { color: #94a3b8; }
.footer-bottom a:hover { color: #fff; }

/* ===== Responsive ===== */
@media (max-width: 900px) {
  .layout-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 24px; }
  .cat-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .main-nav { display: none; position: absolute; top: 60px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 12px 20px; border-bottom: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px; }
  .menu-toggle { display: block; }
  .hero { padding: 32px 24px; }
  .hero-content h1 { font-size: 24px; }
  .article { padding: 24px 18px; }
  .article-header h1 { font-size: 22px; }
  .page-box { padding: 24px 18px; }
  .footer-bottom .container { flex-direction: column; align-items: center; }
}