/* ============ 轮播图 ============ */
.carousel-section {
  background: #fff;
  width: 100%;
}

.carousel-container {
  position: relative;
  width: 100%;
  overflow: hidden;
  aspect-ratio: 9.6 / 1;
  border-radius: 0;
}

.carousel-track {
  display: flex;
  height: 100%;
  transition: transform 0.5s cubic-bezier(0.25, 0.1, 0.25, 1);
}

.carousel-slide {
  min-width: 100%;
  height: 100%;
  position: relative;
  cursor: pointer;
  overflow: hidden;
}

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

.carousel-slide:hover img {
  transform: scale(1.03);
}

.carousel-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 60px 40px 28px;
  background: linear-gradient(transparent, rgba(45,55,72,0.85));
  color: #fff;
  pointer-events: none;
}

.carousel-caption span {
  font-size: 20px;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0,0,0,0.3);
  letter-spacing: -0.2px;
}

/* 左右箭头 */
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  background: rgba(255,255,255,0.85);
  color: var(--secondary);
  border: none;
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
  z-index: 10;
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
}

.carousel-container:hover .carousel-btn {
  opacity: 1;
}

.carousel-btn:hover {
  background: #fff;
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.carousel-prev { left: 20px; }
.carousel-next { right: 20px; }

/* 指示点 */
.carousel-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.carousel-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  padding: 0;
}

.carousel-dot.active {
  background: #fff;
  transform: scale(1.2);
  box-shadow: 0 0 8px rgba(255,255,255,0.5);
}

.carousel-dot:hover {
  background: rgba(255,255,255,0.7);
}

/* ============ 左侧分类导航 ============ */
.category-sidebar {
  width: 200px;
  flex-shrink: 0;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
  position: sticky;
  top: 88px;
  align-self: flex-start;
  max-height: calc(100vh - 108px);
  overflow-y: auto;
}

.category-sidebar::-webkit-scrollbar {
  width: 4px;
}
.category-sidebar::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 2px;
}



.category-sidebar-body {
  padding: 8px 0;
}

.cat-nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  border-left: 3px solid transparent;
}

.cat-nav-item:hover {
  background: var(--bg);
  color: var(--primary);
}

.cat-nav-item.active {
  background: rgba(229,62,62,0.06);
  color: var(--primary);
  border-left-color: var(--primary);
}

.cat-nav-item .cat-arrow {
  font-size: 11px;
  color: var(--text-muted);
  transition: transform 0.2s ease;
  margin-left: 4px;
}

.cat-nav-item.active .cat-arrow,
.cat-nav-item.expanded .cat-arrow {
  transform: rotate(90deg);
}

.cat-nav-all {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  border-left: 3px solid transparent;
  margin-bottom: 4px;
}

.cat-nav-all:hover {
  background: var(--bg);
  color: var(--primary);
}

.cat-nav-all.active {
  background: rgba(229,62,62,0.06);
  color: var(--primary);
  border-left-color: var(--primary);
}

.cat-sub-list {
  display: none;
  padding: 2px 0;
}

.cat-sub-list.expanded {
  display: block;
}

.cat-sub-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px 8px 32px;
  font-size: 13px;
  color: var(--text-light);
  cursor: pointer;
  transition: var(--transition);
  border-left: 3px solid transparent;
  position: relative;
}

.cat-sub-item::before {
  content: '';
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
  transition: var(--transition);
}

.cat-sub-item:hover {
  background: var(--bg);
  color: var(--primary);
}

.cat-sub-item:hover::before {
  background: var(--primary);
}

.cat-sub-item.active {
  color: var(--primary);
  font-weight: 600;
  border-left-color: var(--primary);
  background: rgba(229,62,62,0.04);
}

.cat-sub-item.active::before {
  background: var(--primary);
  width: 6px;
  height: 6px;
}

/* ============ 内容区域布局 ============ */
.main-layout {
  margin: 0 auto;
  padding: 24px;
  display: grid;
  grid-template-columns: 200px 1fr 320px;
  gap: 20px;
}

/* ============ 大图头条区域 ============ */
.featured-hero {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.featured-hero:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.featured-hero-img {
  width: 100%;
  height: 320px;
  overflow: hidden;
  position: relative;
}

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

.featured-hero:hover .featured-hero-img img {
  transform: scale(1.03);
}

.featured-hero-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 60px 28px 24px;
  background: linear-gradient(transparent, rgba(45,55,72,0.8));
  color: #fff;
}

.featured-hero-overlay .featured-hero-tags {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.featured-hero-overlay .featured-hero-tags .tag {
  background: rgba(255,255,255,0.2);
  color: #fff;
  backdrop-filter: blur(4px);
}

.featured-hero-overlay h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 8px;
  letter-spacing: -0.2px;
}

.featured-hero-overlay p {
  font-size: 14px;
  opacity: 0.85;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  margin-top: 10px;
  opacity: 0.75;
}

/* ============ 精选头条三列卡片 ============ */
.featured-row.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.featured-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
}

.featured-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.featured-card-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
}

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

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

.featured-card-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 40px 16px 16px;
  background: linear-gradient(transparent, rgba(45,55,72,0.8));
  color: #fff;
}

.featured-card-overlay .tag {
  background: rgba(255,255,255,0.2);
  color: #fff;
  backdrop-filter: blur(4px);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 4px;
  margin-bottom: 6px;
  display: inline-block;
}

.featured-card-overlay h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-card-overlay p {
  font-size: 13px;
  opacity: 0.85;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  margin-top: 8px;
  opacity: 0.75;
}

/* ============ 次要头条横向双栏（保留） ============ */
.featured-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 24px;
}

.featured-sub {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
}

.featured-sub:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.featured-sub-img {
  width: 100%;
  height: 180px;
  overflow: hidden;
  position: relative;
}

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

.featured-sub:hover .featured-sub-img img {
  transform: scale(1.05);
}

.featured-sub-body {
  padding: 16px;
}

.featured-sub-body .featured-sub-tags {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.featured-sub-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-sub-body .featured-sub-summary {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.featured-sub-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 10px;
}

/* ============ 文章列表 ============ */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.article-item {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.article-item:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(229,62,62,0.12);
  transform: translateY(-1px);
}

.article-item-inner {
  display: flex;
  gap: 16px;
  padding: 16px;
  align-items: center;
}

.article-thumb {
  flex-shrink: 0;
  width: 200px;
  height: 120px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg);
}

.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.article-item:hover .article-thumb img {
  transform: scale(1.05);
}

.article-thumb-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  color: var(--text-muted);
  background: linear-gradient(135deg, #fef2f2, #fee2e2);
}

.article-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.article-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

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

.article-summary {
  font-size: 13px;
  color: var(--text-light);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-footer {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 8px;
}

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

/* ============ 视频卡片 ============ */
.video-card .article-thumb {
  position: relative;
}

.video-card .play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  background: rgba(229,62,62,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  backdrop-filter: blur(4px);
  box-shadow: 0 4px 12px rgba(229,62,62,0.3);
}

/* ============ 侧边栏 ============ */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.sidebar-widget {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  border: 1px solid var(--border);
}

.widget-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.widget-header h3 {
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
}

.widget-body { padding: 12px 20px; }

/* 热门文章 */
.hot-list { list-style: none; padding: 0; margin: 0; }

.hot-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  gap: 0;
  transition: background 0.2s ease;
}

.hot-list li:last-child { border-bottom: none; }

.hot-list li:hover .hot-title {
  color: var(--primary);
}

.hot-list .rank {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  background: var(--bg);
  color: var(--text-muted);
  margin-right: 12px;
}

.hot-list li:nth-child(1) .rank,
.hot-list li:nth-child(2) .rank,
.hot-list li:nth-child(3) .rank {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
}

.hot-list .hot-title {
  flex: 1;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

.hot-list .hot-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* 公告栏 */
.notice-list { list-style: none; }
.notice-list li {
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  cursor: pointer;
}
.notice-list li:last-child { border-bottom: none; }
.notice-list .date { font-size: 12px; color: var(--text-muted); }

/* ============ 响应式 ============ */
@media (max-width: 1200px) {
  .main-layout {
    grid-template-columns: 1fr 320px;
  }
  .category-sidebar { display: none; }
}

@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
  }
  .sidebar { order: -1; }
  .featured-row { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .carousel-container { aspect-ratio: 2 / 1; }
  .carousel-btn { width: 36px; height: 36px; font-size: 16px; }
  .carousel-caption span { font-size: 16px; }
  .article-item-inner { flex-direction: column; }
  .article-thumb { width: 100%; height: 180px; }
  .featured-hero-img { height: 220px; }
  .featured-hero-overlay h2 { font-size: 18px; }
  .featured-row { grid-template-columns: 1fr !important; }
  .featured-row.three-col { grid-template-columns: 1fr !important; }
  .featured-sub-img { height: 160px; }
  .featured-card-img { height: 180px; }
}