/**
 * 博客页面样式
 * 包含博客列表、文章卡片、分类过滤等
 */

/* Hero（Stripe 风：纯白底、黑字大标题、居中展示） */
.blog-hero {
  padding: clamp(72px, 10vh, 128px) 0 clamp(20px, 2.5vh, 36px);
  background: #ffffff;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.blog-hero > .container {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.blog-hero-title {
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #111111;
  margin: 0 0 12px;
}

.blog-hero-subtitle {
  font-size: clamp(16px, 1.4vw, 20px);
  line-height: 1.55;
  color: var(--color-text-secondary);
  margin: 0;
}

/* 博客列表区块 */
.blog-list-section {
  padding: 60px 0;
}

/* 分类过滤 */
.blog-filter {
  display: flex;
  gap: 12px;
  margin-bottom: 40px;
  flex-wrap: wrap;
  justify-content: center;
}

.blog-filter-tag {
  padding: 8px 24px;
  border: 2px solid var(--border);
  border-radius: 24px;
  background: white;
  cursor: pointer;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
}

.blog-filter-tag:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.blog-filter-tag.active {
  background: var(--primary);
  color: white;
  border-color: var(--primary);
}

/* 博客网格 */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.blog-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  overflow: hidden;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
}

.blog-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-border-strong);
  box-shadow: 0 6px 16px rgba(21, 33, 29, 0.06);
}

.blog-card-content {
  padding: 24px;
}

.blog-card-category {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 4px;
  background: var(--gray-light, #f5f5f5);
  color: var(--color-text-secondary);
  font-size: 11px;
  font-weight: 600;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.blog-card-title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 8px;
  color: #111111;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* emoji 作为标题左前缀：和标题同行、同字号的约 1.1 倍，留一点右侧间隙 */
.blog-card-emoji {
  display: inline-block;
  margin-right: 8px;
  font-size: 1.1em;
  line-height: 1;
  vertical-align: -0.08em;
}

.blog-card-excerpt {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text-secondary);
  margin: 0 0 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.blog-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-tertiary);
}

.blog-card-date {
  display: flex;
  align-items: center;
  gap: 4px;
}

.blog-card-date::before {
  content: '📅';
}

.blog-card-readtime {
  display: flex;
  align-items: center;
  gap: 4px;
}

.blog-card-readtime::before {
  content: '⏱';
}

/* 文章详情页 */
.article-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 20px;
}

.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 40px;
}

.article-category {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 4px;
  background: var(--gray-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
}

.article-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.article-excerpt {
  font-size: 16px;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  gap: 24px;
  font-size: 14px;
  color: var(--text-tertiary);
  flex-wrap: wrap;
}

.article-meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-primary);
}

.article-body h2 {
  font-size: 28px;
  font-weight: 700;
  margin: 32px 0 16px 0;
  color: var(--text-primary);
}

.article-body h3 {
  font-size: 22px;
  font-weight: 600;
  margin: 24px 0 12px 0;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 16px;
}

.article-body ul,
.article-body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body blockquote {
  padding-left: 16px;
  border-left: 4px solid var(--primary);
  margin: 24px 0;
  color: var(--text-secondary);
  font-style: italic;
}

.article-body code {
  background: var(--gray-light);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Monaco', 'Menlo', monospace;
  font-size: 14px;
  color: var(--primary);
}

.article-body pre {
  background: var(--gray-light);
  padding: 16px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 16px 0;
  font-size: 14px;
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 24px 0;
}

/* 返回按钮 */
.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  text-decoration: none;
  font-size: 14px;
  margin-bottom: 40px;
  transition: all 0.3s ease;
}

.article-back:hover {
  gap: 10px;
}

.article-back::before {
  content: '←';
}

/* 相关文章 */
.related-articles {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border);
}

.related-articles-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 24px;
}

.related-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.related-article-card {
  background: white;
  border-radius: 8px;
  padding: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
}

.related-article-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.related-article-card-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-article-card-date {
  font-size: 12px;
  color: var(--text-tertiary);
}

/* 空状态 */
.blog-empty {
  text-align: center;
  padding: 60px 20px;
  color: var(--text-secondary);
}

.blog-empty-icon {
  font-size: 64px;
  margin-bottom: 16px;
}

.blog-empty-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 8px;
}

/* 响应式设计 */
@media (max-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .related-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .article-title {
    font-size: 32px;
  }
}

@media (max-width: 768px) {
  .blog-list-section {
    padding: 40px 0;
  }

  .blog-grid {
    grid-template-columns: 1fr;
  }

  .related-articles-grid {
    grid-template-columns: 1fr;
  }

  .blog-filter {
    justify-content: flex-start;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .article-title {
    font-size: 24px;
  }

  .article-wrapper {
    padding: 40px 20px;
  }

  .article-header {
    padding-bottom: 24px;
  }
}