/* AKI 内容中心 - 共享样式 */
:root {
  --aki-blue: #1a73e8;
  --aki-dark: #1a1a2e;
  --aki-gray: #5f6368;
  --aki-light: #f8f9fa;
  --aki-border: #e0e0e0;
  --aki-accent: #ff6b35;
  --aki-green: #0d904f;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #333;
  line-height: 1.8;
  background: #fff;
}

/* Header */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--aki-border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--aki-dark);
  text-decoration: none;
}
.logo span { color: var(--aki-blue); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a {
  text-decoration: none;
  color: var(--aki-gray);
  font-size: 15px;
  transition: color 0.2s;
}
.nav-links a:hover, .nav-links a.active { color: var(--aki-blue); }

/* Breadcrumb */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  font-size: 14px;
  color: var(--aki-gray);
}
.breadcrumb a { color: var(--aki-blue); text-decoration: none; }
.breadcrumb span { margin: 0 8px; }

/* Container */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--aki-dark) 0%, #16213e 100%);
  color: #fff;
  padding: 80px 24px;
  text-align: center;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}
.hero p {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  max-width: 600px;
  margin: 0 auto;
}

/* Article Cards */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
  padding: 48px 0;
}
.article-card {
  border: 1px solid var(--aki-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.2s, box-shadow 0.2s;
  background: #fff;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.08);
}
.article-card-img {
  height: 200px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 48px;
}
.article-card-body {
  padding: 24px;
}
.article-card .category {
  display: inline-block;
  background: #e8f0fe;
  color: var(--aki-blue);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}
.article-card h3 {
  font-size: 20px;
  margin-bottom: 8px;
  line-height: 1.4;
}
.article-card h3 a {
  color: var(--aki-dark);
  text-decoration: none;
}
.article-card h3 a:hover { color: var(--aki-blue); }
.article-card .excerpt {
  font-size: 14px;
  color: var(--aki-gray);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card .meta {
  font-size: 13px;
  color: #999;
  display: flex;
  justify-content: space-between;
}

/* Category Sections */
.section-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--aki-dark);
}
.section-desc {
  font-size: 16px;
  color: var(--aki-gray);
  margin-bottom: 32px;
}
.categories {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}
.cat-tag {
  padding: 8px 20px;
  border: 1px solid var(--aki-border);
  border-radius: 24px;
  text-decoration: none;
  color: var(--aki-gray);
  font-size: 14px;
  transition: all 0.2s;
}
.cat-tag:hover, .cat-tag.active {
  background: var(--aki-blue);
  color: #fff;
  border-color: var(--aki-blue);
}

/* Article Content */
.article-header {
  padding: 48px 0 32px;
}
.article-header .category {
  display: inline-block;
  background: #e8f0fe;
  color: var(--aki-blue);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.article-header h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  color: var(--aki-dark);
}
.article-header .meta {
  font-size: 14px;
  color: var(--aki-gray);
}
.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  margin: 48px 0 16px;
  padding-top: 24px;
  border-top: 1px solid var(--aki-border);
  color: var(--aki-dark);
}
.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 32px 0 12px;
  color: #333;
}
.article-body p {
  margin-bottom: 16px;
  font-size: 17px;
}
.article-body ul, .article-body ol {
  margin: 16px 0 16px 24px;
}
.article-body li {
  margin-bottom: 8px;
  font-size: 17px;
}
.article-body blockquote {
  border-left: 4px solid var(--aki-blue);
  padding: 16px 24px;
  margin: 24px 0;
  background: var(--aki-light);
  border-radius: 0 8px 8px 0;
  font-size: 16px;
  color: #555;
}
.article-body .summary-box {
  background: linear-gradient(135deg, #e8f0fe, #f0e6ff);
  border-radius: 12px;
  padding: 24px;
  margin: 24px 0;
}
.article-body .summary-box h4 {
  color: var(--aki-blue);
  margin-bottom: 12px;
  font-size: 18px;
}
.article-body .summary-box ul { margin: 0; list-style: none; }
.article-body .summary-box li {
  padding: 4px 0;
  font-size: 16px;
}
.article-body .summary-box li::before {
  content: "✓ ";
  color: var(--aki-green);
  font-weight: bold;
}
.article-body .highlight {
  background: #fff3cd;
  padding: 2px 6px;
  border-radius: 4px;
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.article-body th, .article-body td {
  border: 1px solid var(--aki-border);
  padding: 12px 16px;
  text-align: left;
}
.article-body th {
  background: var(--aki-light);
  font-weight: 600;
}
.article-body tr:nth-child(even) { background: #fafafa; }

/* FAQ */
.faq-section {
  margin: 48px 0;
  background: var(--aki-light);
  border-radius: 12px;
  padding: 32px;
}
.faq-section h2 {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}
.faq-item {
  margin-bottom: 20px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--aki-border);
}
.faq-item:last-child { border-bottom: none; margin-bottom: 0; padding-bottom: 0; }
.faq-item h4 {
  color: var(--aki-dark);
  font-size: 18px;
  margin-bottom: 8px;
}
.faq-item p { font-size: 16px; color: #555; margin-bottom: 0; }

/* CTA */
.cta-section {
  background: linear-gradient(135deg, var(--aki-blue), #4a00e0);
  color: #fff;
  border-radius: 16px;
  padding: 48px;
  margin: 48px 0;
  text-align: center;
}
.cta-section h3 {
  font-size: 28px;
  margin-bottom: 12px;
}
.cta-section p {
  font-size: 17px;
  opacity: 0.9;
  margin-bottom: 24px;
}
.cta-btn {
  display: inline-block;
  background: #fff;
  color: var(--aki-blue);
  padding: 14px 40px;
  border-radius: 30px;
  font-size: 17px;
  font-weight: 700;
  text-decoration: none;
  transition: transform 0.2s;
}
.cta-btn:hover { transform: scale(1.05); }

/* Sidebar (for blog index) */
.blog-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
}
.sidebar {
  padding-top: 48px;
}
.sidebar-widget {
  background: var(--aki-light);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 24px;
}
.sidebar-widget h4 {
  font-size: 16px;
  margin-bottom: 16px;
  color: var(--aki-dark);
}
.sidebar-widget ul { list-style: none; }
.sidebar-widget li { margin-bottom: 10px; }
.sidebar-widget a {
  color: var(--aki-gray);
  text-decoration: none;
  font-size: 14px;
}
.sidebar-widget a:hover { color: var(--aki-blue); }

/* Related Articles */
.related-articles {
  margin: 48px 0;
  padding-top: 32px;
  border-top: 2px solid var(--aki-light);
}
.related-articles h3 {
  font-size: 22px;
  margin-bottom: 24px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  border: 1px solid var(--aki-border);
  border-radius: 10px;
  padding: 20px;
  text-decoration: none;
  color: inherit;
  transition: box-shadow 0.2s;
}
.related-card:hover { box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.related-card h4 { font-size: 16px; margin-bottom: 8px; color: var(--aki-dark); }
.related-card p { font-size: 14px; color: var(--aki-gray); }

/* Footer */
.site-footer {
  background: var(--aki-dark);
  color: rgba(255,255,255,0.6);
  padding: 48px 24px;
  margin-top: 80px;
  text-align: center;
  font-size: 14px;
}
.site-footer a {
  color: rgba(255,255,255,0.9);
  text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 28px; }
  .hero { padding: 48px 24px; }
  .article-header h1 { font-size: 26px; }
  .article-body h2 { font-size: 22px; }
  .article-body h3 { font-size: 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .blog-layout { grid-template-columns: 1fr; }
  .article-grid { grid-template-columns: 1fr; }
  .cta-section { padding: 32px 24px; }
}