/* =====================================================
   到可到对货 官网 - 行业文章样式
   ===================================================== */

/* ─── 文章列表页 ─── */
.articles-page-title {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-primary-light);
}

.article-card-img {
  width: 100%;
  height: 200px;
  object-fit: contain;
  background: var(--color-bg-section-alt);
}

.article-card-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.article-card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 10px;
  line-height: var(--line-height-tight);
}

.article-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-normal);
  flex: 1;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-link {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
}

.article-card-link i {
  font-size: 12px;
  transition: transform var(--transition-fast);
}

.article-card:hover .article-card-link i {
  transform: translateX(3px);
}

/* ─── 单篇文章页 ─── */
.article-detail {
  max-width: 780px;
  margin: 0 auto;
  padding: var(--spacing-3xl) 24px var(--spacing-5xl);
}

.article-header {
  margin-bottom: var(--spacing-2xl);
}

.article-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  transition: color var(--transition-fast);
}

.article-back:hover {
  color: var(--color-primary);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
}

.article-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-radius: var(--radius-full);
}

.article-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.article-title {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  line-height: 1.35;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.3px;
}

.article-summary {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding: var(--spacing-md) var(--spacing-lg);
  background: var(--color-primary-bg);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary);
  margin-bottom: var(--spacing-xl);
}

/* ─── 文章正文 ─── */
.article-content {
  font-size: var(--font-size-md);
  line-height: 1.9;
  color: var(--color-text-primary);
}

/* 分隔线增强 */
.article-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--color-border), transparent);
  margin: var(--spacing-2xl) 0;
}

/* 标题层级优化 */
.article-content h2 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin: var(--spacing-3xl) 0 var(--spacing-lg);
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-primary-light);
  position: relative;
}

.article-content h2::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.article-content h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: var(--spacing-2xl) 0 var(--spacing-md);
  padding-left: 14px;
  border-left: 3px solid var(--color-primary);
  line-height: 1.4;
}

.article-content h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  margin: var(--spacing-xl) 0 var(--spacing-md);
}

.article-content p {
  margin-bottom: var(--spacing-lg);
}

/* 加粗强调增强 */
.article-content strong {
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  background: linear-gradient(to top, rgba(25, 118, 210, 0.1) 40%, transparent 40%);
  padding: 0 2px;
}

.article-content em {
  color: var(--color-text-secondary);
  font-style: italic;
}

/* 列表优化 */
.article-content ul,
.article-content ol {
  margin: var(--spacing-md) 0 var(--spacing-lg);
  padding-left: 28px;
}

.article-content ul {
  list-style: none;
}

.article-content ul li {
  position: relative;
  padding-left: 20px;
}

.article-content ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
  opacity: 0.5;
}

.article-content ol {
  list-style: none;
  counter-reset: article-ol;
}

.article-content ol li {
  counter-increment: article-ol;
  position: relative;
  padding-left: 28px;
}

.article-content ol li::before {
  content: counter(article-ol) ".";
  position: absolute;
  left: 0;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.article-content li {
  margin-bottom: 10px;
  line-height: 1.8;
}

/* Blockquote 增强 */
.article-content blockquote {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-lg) var(--spacing-xl);
  background: linear-gradient(135deg, #F0F7FF 0%, #F8FAFC 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--color-text-primary);
  font-size: var(--font-size-md);
  line-height: 1.8;
  position: relative;
  box-shadow: 0 2px 8px rgba(25, 118, 210, 0.06);
}

.article-content blockquote::before {
  content: '\201C';
  position: absolute;
  left: -8px;
  top: -8px;
  font-size: 48px;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
}

.article-content blockquote p {
  margin-bottom: 0;
}

/* 图片增强 */
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  margin: var(--spacing-2xl) auto;
  box-shadow: var(--shadow-md);
  display: block;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
  cursor: zoom-in;
}

.article-content img:hover {
  box-shadow: var(--shadow-lg);
  transform: scale(1.01);
}

.article-content .article-img-caption {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: -16px;
  margin-bottom: var(--spacing-lg);
}

/* ════════════════════════════════════════════════════════
   新增：阅读进度条
   ════════════════════════════════════════════════════════ */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  z-index: 9999;
  background: rgba(25, 118, 210, 0.08);
}

.reading-progress-bar {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), #42A5F5, #64B5F6);
  transition: width 0.15s ease;
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 6px rgba(25, 118, 210, 0.4);
}

/* ════════════════════════════════════════════════════════
   新增：返回顶部按钮
   ════════════════════════════════════════════════════════ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-md);
  color: var(--color-text-secondary);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition-slow);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-white);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* ════════════════════════════════════════════════════════
   新增：图片点击放大（灯箱）
   ════════════════════════════════════════════════════════ */
.lightbox-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-slow);
  cursor: zoom-out;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.lightbox-overlay.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-overlay img {
  max-width: 90%;
  max-height: 90%;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: scale(0.9);
  transition: transform var(--transition-slow);
}

.lightbox-overlay.active img {
  transform: scale(1);
}

.lightbox-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  color: #fff;
  font-size: 24px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast);
}

.lightbox-close:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* ════════════════════════════════════════════════════════
   新增：图片懒加载淡入效果
   ════════════════════════════════════════════════════════ */
.article-content img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.article-content img[loading="lazy"].loaded,
.article-content img[loading="lazy"]:not([loading]) {
  opacity: 1;
}

/* ════════════════════════════════════════════════════════
   新增：锚点标题滚动偏移
   ════════════════════════════════════════════════════════ */
.article-content h2[id],
.article-content h3[id] {
  scroll-margin-top: 80px;
}

/* ════════════════════════════════════════════════════════
   新增：正文链接样式
   ════════════════════════════════════════════════════════ */
.article-content a:not(.no-underline) {
  color: var(--color-primary);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-fast);
}

.article-content a:not(.no-underline):hover {
  border-bottom-color: var(--color-primary);
}

/* ════════════════════════════════════════════════════════
   新增：第一条 blockquote 首字母放大（文章开篇强调）
   ════════════════════════════════════════════════════════ */
.article-content > blockquote:first-of-type {
  background: linear-gradient(135deg, #E3F2FD 0%, #F0F7FF 50%, #F8FAFC 100%);
  border-left-width: 4px;
  padding: var(--spacing-xl) var(--spacing-xl);
}

.article-content > blockquote:first-of-type p:first-child::first-letter {
  font-size: 1.5em;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

/* ─── 推荐阅读 ─── */
.article-related {
  margin-top: var(--spacing-3xl);
  padding-top: var(--spacing-2xl);
  border-top: 1px solid var(--color-border);
}

.article-related h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: var(--spacing-lg);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.related-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.related-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary-light);
}

.related-card-img {
  width: 100%;
  height: 120px;
  object-fit: contain;
  background: var(--color-bg-section-alt);
}

.related-card-body {
  padding: 12px 14px;
  flex: 1;
}

.related-card-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  line-height: var(--line-height-tight);
}

@media (max-width: 768px) {
  .related-grid {
    grid-template-columns: 1fr;
  }
  .related-card-img {
    height: 160px;
    object-fit: contain;
  }
}

/* ─── 文章底部CTA ─── */
.article-cta {
  margin-top: var(--spacing-3xl);
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--color-primary-bg) 0%, #F0FDF4 100%);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  text-align: center;
}

.article-cta h3 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-primary);
  margin-bottom: 8px;
}

.article-cta p {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.article-cta-btns {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

/* ════════════════════════════════════════════════════════
   新增：滚动入场动画（文章内容）
   ════════════════════════════════════════════════════════ */
.article-content .animate-fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.article-content .animate-fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── 响应式 ─── */
@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-title {
    font-size: var(--font-size-2xl);
  }
}

@media (max-width: 768px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .article-detail {
    padding: var(--spacing-xl) 16px var(--spacing-3xl);
  }
  .article-title {
    font-size: var(--font-size-2xl);
  }
  .article-content {
    font-size: 19px;
    line-height: 1.85;
  }
  .article-content h2 {
    font-size: var(--font-size-2xl);
    margin: var(--spacing-2xl) 0 var(--spacing-md);
  }
  .article-content h3 {
    font-size: 21px;
  }
  .article-content p {
    margin-bottom: var(--spacing-lg);
  }
  .article-card-img {
    height: 180px;
    object-fit: contain;
  }
  .article-summary {
    font-size: var(--font-size-md);
    padding: var(--spacing-md);
  }

  /* 移动端：返回顶部按钮调整位置 */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 16px;
  }

  /* 移动端：灯箱图片边距 */
  .lightbox-overlay img {
    max-width: 95%;
    max-height: 85%;
  }

  .lightbox-close {
    top: 16px;
    right: 16px;
  }
}

/* 极小屏 */
@media (max-width: 480px) {
  .article-detail {
    padding: var(--spacing-lg) 12px var(--spacing-2xl);
  }
  .article-title {
    font-size: var(--font-size-xl);
  }
  .article-content {
    font-size: 18px;
    line-height: 1.8;
  }
  .article-content h2 {
    font-size: 22px;
  }
  .article-content h3 {
    font-size: 20px;
  }
  .article-content blockquote {
    padding: var(--spacing-md);
    font-size: var(--font-size-sm);
  }
  .article-content img {
    border-radius: var(--radius-sm);
    margin: var(--spacing-lg) auto;
    max-width: 100%;
  }
  .article-cta {
    margin-left: -12px;
    margin-right: -12px;
    border-radius: 0;
  }
}

/* ════════════════════════════════════════════════════════
   可截屏金句样式
   ════════════════════════════════════════════════════════ */
.article-content .pull-quote {
  margin: var(--spacing-2xl) 0;
  padding: var(--spacing-xl) var(--spacing-2xl);
  background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  line-height: 1.6;
  text-align: center;
  position: relative;
  box-shadow: 0 2px 12px rgba(25, 118, 210, 0.08);
}

.article-content .pull-quote::before {
  content: '"';
  position: absolute;
  top: -8px;
  left: 12px;
  font-size: 48px;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.article-content .pull-quote::after {
  content: '"';
  position: absolute;
  bottom: -24px;
  right: 12px;
  font-size: 48px;
  color: var(--color-primary);
  opacity: 0.2;
  font-family: Georgia, serif;
  line-height: 1;
}

.article-content .pull-quote em {
  font-style: normal;
  color: var(--color-primary);
}

.article-content .pull-quote strong {
  background: none;
  padding: 0;
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .article-content .pull-quote {
    font-size: var(--font-size-lg);
    padding: var(--spacing-lg) var(--spacing-md);
    margin: var(--spacing-xl) 0;
  }
}

/* ════════════════════════════════════════════════════════
   文章列表页优化 — 增量添加，不破坏详情页
   ════════════════════════════════════════════════════════ */

/* ─── 1. 图片改为 cover + 悬浮缩放 ─── */
.article-card-img {
  object-fit: cover;
  transition: transform 0.4s ease, filter 0.4s ease;
}

.article-card:hover .article-card-img {
  transform: scale(1.06);
}

/* ─── 2. 分类标签（如果卡片上存在 .article-card-category） ─── */
.article-card-category {
  display: inline-block;
  padding: 3px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border-radius: var(--radius-full);
  margin-bottom: 8px;
  align-self: flex-start;
  letter-spacing: 0.3px;
}

/* ─── 3. 卡片元数据行 ─── */
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.article-card-meta i {
  font-size: 11px;
  margin-right: 3px;
}

.article-card-meta span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ─── 4. 卡片 hover 增强 ─── */
.article-card {
  transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  overflow: hidden;
}

.article-card:hover {
  box-shadow: 0 8px 25px rgba(25, 118, 210, 0.10);
  transform: translateY(-4px);
  border-color: var(--color-primary);
}

/* ─── 5. 阅读全文链接增强 ─── */
.article-card-link {
  position: relative;
  transition: color 0.2s ease;
}

.article-card-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.article-card:hover .article-card-link::after {
  width: 100%;
}

.article-card:hover .article-card-link {
  color: var(--color-primary-dark);
}

.article-card:hover .article-card-link i {
  transform: translateX(5px);
}

/* ─── 6. 分类筛选栏 ─── */
.articles-filter {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-2xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.filter-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 16px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 34px;
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-light);
  background: var(--color-primary-bg);
}

.filter-btn.active {
  color: #fff;
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn i {
  font-size: 12px;
}

/* ─── 7. 搜索框 ─── */
.articles-search-wrap {
  position: relative;
  margin-left: auto;
  max-width: 260px;
  width: 100%;
}

.articles-search-input {
  width: 100%;
  padding: 8px 14px 8px 36px;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  outline: none;
  transition: all var(--transition-fast);
  min-height: 36px;
}

.articles-search-input::placeholder {
  color: var(--color-text-muted);
}

.articles-search-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.articles-search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 13px;
  color: var(--color-text-muted);
  pointer-events: none;
}

/* ─── 8. 空结果提示 ─── */
.articles-empty {
  display: none;
  text-align: center;
  padding: var(--spacing-5xl) 0;
  grid-column: 1 / -1;
}

.articles-empty.visible {
  display: block;
}

.articles-empty-icon {
  font-size: 48px;
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  opacity: 0.4;
}

.articles-empty-text {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
}

/* ─── 9. 卡片入场动画 ─── */
.article-card {
  opacity: 0;
  transform: translateY(20px);
  animation: articleCardFadeIn 0.5s ease forwards;
}

@keyframes articleCardFadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.article-card:nth-child(1) { animation-delay: 0.05s; }
.article-card:nth-child(2) { animation-delay: 0.10s; }
.article-card:nth-child(3) { animation-delay: 0.15s; }
.article-card:nth-child(4) { animation-delay: 0.20s; }
.article-card:nth-child(5) { animation-delay: 0.25s; }
.article-card:nth-child(6) { animation-delay: 0.30s; }
.article-card:nth-child(7) { animation-delay: 0.35s; }
.article-card:nth-child(8) { animation-delay: 0.40s; }
.article-card:nth-child(9) { animation-delay: 0.45s; }
.article-card:nth-child(10) { animation-delay: 0.50s; }
.article-card:nth-child(11) { animation-delay: 0.55s; }
.article-card:nth-child(12) { animation-delay: 0.60s; }

/* ─── 10. Hero 区域增强 ─── */
.articles-stats {
  margin-top: var(--spacing-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.articles-stats strong {
  color: var(--color-primary);
  font-weight: var(--font-weight-bold);
}

/* ─── 11. 宽屏增强 ─── */
@media (min-width: 1200px) {
  .article-card-body {
    padding: 24px;
  }
  .articles-grid {
    gap: 28px;
  }
}

/* ─── 12. 移动端适配 ─── */
@media (max-width: 768px) {
  .articles-filter {
    flex-direction: row;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 12px;
    gap: 8px;
  }
  .articles-search-wrap {
    margin-left: 0;
    max-width: 100%;
    margin-top: 8px;
    width: 100%;
  }
  .articles-search-input {
    width: 100%;
  }
  .filter-btn {
    white-space: nowrap;
    flex-shrink: 0;
    font-size: 12px;
    padding: 5px 12px;
  }
}