/* 文章列表页样式 */
:root {
  --primary-color: #4a90e2;
  --secondary-color: #f0f7ff;
  --text-primary: #333333;
  --text-secondary: #666666;
  --text-light: #999999;
  --bg-light: #f8f9fa;
  --border-light: #e0e0e0;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

/* 文章容器 */
.article-container {
  max-width: 1600px;
  margin: 0 auto;
  padding: var(--spacing-lg);
  background-color: #ffffff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

/* 标题区域 */
.title-section {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-light);
}

.main-title {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--primary-color);
  opacity: 0.8;
}

/* 文章卡片网格 */
.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

/* 文章卡片 */
.article-card {
  background-color: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border: 1px solid var(--border-light);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.article-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  text-decoration: none;
  color: inherit;
}

/* 文章图片区域 */
.article-image {
  height: 200px;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-light);
}

.article-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.article-card:hover .article-image img {
  transform: scale(1.05);
}

/* 文章内容区域 */
.article-content {
  padding: var(--spacing-lg);
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.article-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.article-summary {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  display: -webkit-box;
  -webkit-line-clamp: 3;
  line-clamp: 3; /* 标准属性，增强兼容性 */
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

/* 文章元信息 */
.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-light);
  margin-top: auto;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.meta-item svg {
  width: 16px;
  height: 16px;
}

/* 分页控件 */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.page-item {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  padding: 0 var(--spacing-sm);
}

.page-link {
  color: var(--text-secondary);
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  text-decoration: none;
}

.page-link:hover {
  background-color: var(--secondary-color);
  color: var(--primary-color);
  border-color: var(--primary-color);
}

.page-current {
  background-color: var(--primary-color);
  color: #ffffff;
  border: 1px solid var(--primary-color);
}

.page-disabled {
  color: var(--text-light);
  background-color: #ffffff;
  border: 1px solid var(--border-light);
  cursor: not-allowed;
  opacity: 0.7;
}

/* 离线提示 */
.offline-message {
  background-color: #f8d7da;
  color: #721c24;
  padding: 12px;
  margin-bottom: 20px;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  border: 1px solid #f5c6cb;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 图片延迟加载 */
.lazy-load {
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lazy-load.loaded {
  opacity: 1;
}

/* 图片占位符 */
.img-placeholder {
  background-color: #f0f0f0;
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(255,255,255,0), rgba(255,255,255,0.2), rgba(255,255,255,0));
  transform: translateX(-100%);
  animation: loading 1.5s infinite;
}

@keyframes loading {
  100% {
    transform: translateX(100%);
  }
}

/* 响应式设计 */
@media (max-width: 768px) {
  .article-grid {
    grid-template-columns: 1fr;
  }
  
  .article-image {
    height: 180px;
  }
  
  .article-content {
    padding: var(--spacing-md);
  }
  
  .article-title {
    font-size: 1.1rem;
  }
  
  .article-summary {
    font-size: 0.9rem;
    -webkit-line-clamp: 2;
    line-clamp: 2;
  }
  
  .pagination {
    flex-wrap: wrap;
  }
}