/* ========================================
   新闻列表 / 新闻详情页样式
======================================== */

/* ---------- 分类 Tab（复用产品页样式） ---------- */
.category-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
  margin-bottom: 48px;
  padding: 8px 0;
}

.category-tab {
  position: relative;
  padding: 10px 28px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.category-tab:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.category-tab.is-active {
  background: var(--gradient-primary);
  color: var(--color-white);
  border-color: transparent;
  box-shadow: var(--shadow-accent);
}

/* ---------- 新闻列表 ---------- */
.section-news-list {
  background: var(--color-bg);
  min-height: 60vh;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all 0.4s var(--ease);
}

.news-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.news-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-bg);
}

.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.news-card:hover .news-cover img {
  transform: scale(1.08);
}

.news-cover .news-cat-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 20px;
  background: rgba(0, 102, 255, 0.85);
  color: var(--color-white);
  backdrop-filter: blur(4px);
  z-index: 2;
  font-weight: 500;
}

.news-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-body .news-date {
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}

.news-body h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-primary);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color var(--transition);
}

.news-card:hover .news-body h3 {
  color: var(--color-accent);
}

.news-body p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-muted);
  padding-top: 14px;
  border-top: 1px solid var(--color-border);
}

.news-meta span {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* 骨架屏 */
.news-card.skeleton-card .news-cover,
.news-card.skeleton-card .sk-line {
  background: linear-gradient(90deg, #EEF2F7 25%, #F8FAFC 50%, #EEF2F7 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.4s infinite;
}

/* ---------- 新闻详情 ---------- */
.section-news-detail {
  background: var(--color-white);
  padding-top: 56px;
}

.news-detail-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
  align-items: start;
}

.news-detail-main {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.news-detail-head {
  padding: 0 0 28px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 32px;
}

.news-detail-head .news-category {
  display: inline-block;
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 20px;
  background: rgba(0, 102, 255, 0.1);
  color: var(--color-accent);
  font-weight: 500;
  margin-bottom: 20px;
}

.news-detail-head h1 {
  font-size: 32px;
  line-height: 1.4;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.news-detail-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 14px;
  color: var(--color-text-light);
  flex-wrap: wrap;
}

.news-detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.news-detail-meta .author {
  color: var(--color-primary);
  font-weight: 500;
}

.news-detail-cover {
  margin-bottom: 32px;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  aspect-ratio: 16 / 9;
  background: var(--color-bg);
}

.news-detail-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-detail-content {
  padding-bottom: 40px;
}

/* 上一篇/下一篇 */
.news-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  padding: 32px 0 0;
  border-top: 1px solid var(--color-border);
  margin-top: 8px;
}

.news-nav-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 22px;
  border-radius: var(--radius-md);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  min-width: 0;
}

.news-nav-item:hover {
  background: var(--color-white);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.news-nav-item.next {
  text-align: right;
}

.news-nav-item .nav-label {
  font-size: 12px;
  color: var(--color-text-muted);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.news-nav-item .nav-title {
  font-size: 14px;
  color: var(--color-primary);
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}

.news-nav-item:hover .nav-title {
  color: var(--color-accent);
}

/* 侧边栏 */
.news-aside {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.aside-card h4 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.aside-card p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 20px;
  line-height: 1.7;
}

.aside-card .btn {
  width: 100%;
}

/* ========================================
   响应式
======================================== */
@media (max-width: 992px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .news-detail-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .news-aside {
    position: static;
    flex-direction: row;
  }

  .news-detail-head h1 { font-size: 26px; }
}

@media (max-width: 768px) {
  .news-grid {
    grid-template-columns: 1fr;
  }

  .category-tabs {
    gap: 8px;
  }

  .category-tab {
    padding: 8px 18px;
    font-size: 13px;
  }

  .news-aside {
    flex-direction: column;
  }

  .news-detail-head h1 { font-size: 22px; }

  .news-detail-meta {
    gap: 16px;
    font-size: 13px;
  }

  .news-nav {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .news-nav-item.next {
    text-align: left;
  }
}