/* ========================================
   SEO GEO Site - 前台页面样式（默认主题）
   ======================================== */

/* 基础样式 */
:root {
  --primary-color: #2563eb;
  --primary-hover: #1d4ed8;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --bg-light: #f9fafb;
  --border-color: #e5e7eb;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* 容器样式 */
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

/* 文章样式 */
.prose {
  max-width: 65ch;
  line-height: 1.75;
}

.prose img {
  border-radius: 0.5rem;
  margin: 1.5rem 0;
}

.prose h1,
.prose h2,
.prose h3 {
  margin-top: 2rem;
  margin-bottom: 1rem;
  font-weight: 700;
}

.prose p {
  margin-bottom: 1.25rem;
}

.prose a {
  color: var(--primary-color);
  text-decoration: underline;
}

.prose code {
  background: #f3f4f6;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 0.875em;
}

.prose pre {
  background: #1f2937;
  color: #f9fafb;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.prose pre code {
  background: transparent;
  padding: 0;
  color: inherit;
}

.prose blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 1.5rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.prose ul,
.prose ol {
  margin: 1rem 0;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

/* 卡片样式 */
.card {
  background: white;
  border-radius: 0.5rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}

.card:hover {
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card-image {
  width: 100%;
  height: 12rem;
  object-fit: cover;
}

.card-content {
  padding: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.card-title a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.card-title a:hover {
  color: var(--primary-color);
}

.card-summary {
  color: var(--text-secondary);
  font-size: 0.875rem;
  line-height: 1.5;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 标签样式 */
.tag {
  display: inline-block;
  background: #f3f4f6;
  color: var(--text-secondary);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  text-decoration: none;
  transition: all 0.2s ease;
}

.tag:hover {
  background: #e5e7eb;
  color: var(--text-primary);
}

/* 导航样式 */
.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--primary-color);
}

.nav-link.active {
  color: var(--primary-color);
  font-weight: 600;
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 0.375rem;
  font-weight: 500;
  text-decoration: none;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  border: none;
}

.btn-primary {
  background: var(--primary-color);
  color: white;
}

.btn-primary:hover {
  background: var(--primary-hover);
}

.btn-secondary {
  background: #f3f4f6;
  color: var(--text-primary);
}

.btn-secondary:hover {
  background: #e5e7eb;
}

/* 页脚样式 */
.footer {
  background: #1f2937;
  color: white;
  margin-top: 3rem;
}

.footer a {
  color: #9ca3af;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer a:hover {
  color: white;
}

/* 面包屑导航 */
.breadcrumb {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.breadcrumb a {
  color: var(--primary-color);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
}

/* 空状态 */
.empty-state {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--text-secondary);
}

/* 响应式样式 */
@media (max-width: 768px) {
  .container {
    padding-left: 0.75rem;
    padding-right: 0.75rem;
  }
  
  .card-image {
    height: 10rem;
  }
  
  .prose {
    max-width: 100%;
  }
}