/* 分类页面专用样式 */

/* 分类容器 */
.categories-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
  background: var(--card-bg);
  border-radius: 15px;
  box-shadow: var(--card-shadow);
}

/* 分类页面头部 */
.categories-header {
  text-align: center;
  margin-bottom: 3rem;
  position: relative;
}

.categories-header::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--theme-color), var(--theme-color-light));
  border-radius: 2px;
}

.categories-title {
  font-size: 2.8rem;
  color: var(--text-color);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--theme-color), var(--theme-color-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.categories-title i {
  color: var(--theme-color);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.categories-description {
  font-size: 1.2rem;
  color: var(--text-color-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
  font-weight: 300;
}

/* 搜索框样式 */
.categories-search {
  margin-bottom: 2.5rem;
  display: flex;
  justify-content: center;
}

.search-box {
  position: relative;
  max-width: 450px;
  width: 100%;
}

.search-box::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(45deg, var(--theme-color), var(--theme-color-light), var(--theme-color));
  border-radius: 27px;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.search-box:focus-within::before {
  opacity: 1;
}

.search-box i.fa-search {
  position: absolute;
  left: 1.2rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-color-secondary);
  font-size: 1.1rem;
  z-index: 2;
}

#category-search {
  width: 100%;
  padding: 1rem 1.2rem 1rem 3rem;
  border: 2px solid var(--border-color);
  border-radius: 25px;
  font-size: 1.1rem;
  background: var(--card-bg);
  color: var(--text-color);
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

#category-search:focus {
  outline: none;
  border-color: transparent;
  box-shadow: 0 8px 25px rgba(var(--theme-color-rgb), 0.15);
  transform: translateY(-1px);
}

#category-search::placeholder {
  color: var(--text-color-secondary);
  opacity: 0.7;
}

.clear-btn {
  position: absolute;
  right: 0.8rem;
  top: 50%;
  transform: translateY(-50%);
  background: var(--hover-bg);
  border: none;
  color: var(--text-color-secondary);
  cursor: pointer;
  padding: 0.6rem;
  border-radius: 50%;
  transition: all 0.3s ease;
  display: none;
  z-index: 2;
}

.clear-btn:hover {
  background: var(--theme-color);
  color: white;
  transform: translateY(-50%) scale(1.1);
}

/* 统计信息样式 */
.categories-stats {
  display: flex;
  justify-content: center;
  gap: 4rem;
  margin-bottom: 2.5rem;
  padding: 1.5rem;
  background: linear-gradient(135deg, var(--card-bg), var(--hover-bg));
  border-radius: 15px;
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.stat-item {
  text-align: center;
  position: relative;
}

.stat-item::after {
  content: '';
  position: absolute;
  right: -2rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 30px;
  background: var(--border-color);
}

.stat-item:last-child::after {
  display: none;
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--theme-color), var(--theme-color-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 1rem;
  color: var(--text-color-secondary);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* 过滤和排序按钮样式 */
.categories-filter {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 3rem;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.filter-buttons,
.sort-buttons {
  display: flex;
  background: var(--card-bg);
  border-radius: 30px;
  padding: 0.4rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}

.filter-btn,
.sort-btn {
  padding: 0.8rem 1.5rem;
  border: none;
  background: none;
  color: var(--text-color-secondary);
  cursor: pointer;
  border-radius: 25px;
  transition: all 0.3s ease;
  font-size: 1rem;
  font-weight: 500;
  position: relative;
  overflow: hidden;
}

.filter-btn::before,
.sort-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--theme-color), var(--theme-color-light));
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 25px;
}

.filter-btn.active::before,
.filter-btn:hover::before,
.sort-btn.active::before,
.sort-btn:hover::before {
  opacity: 1;
}

.filter-btn.active,
.filter-btn:hover,
.sort-btn.active,
.sort-btn:hover {
  color: white;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(var(--theme-color-rgb), 0.3);
}

.filter-btn span,
.sort-btn span {
  position: relative;
  z-index: 1;
}

/* 树形视图样式 */
.categories-tree {
  background: var(--card-bg);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border-color);
}

.category-tree-item {
  margin-bottom: 1rem;
}

.category-node {
  display: flex;
  align-items: center;
  padding: 1rem;
  border-radius: 12px;
  transition: all 0.3s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.category-node::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--theme-color), var(--theme-color-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-node:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 12px rgba(var(--theme-color-rgb), 0.15);
}

.category-node:hover::before {
  opacity: 0.1;
}

.category-node .category-icon {
  margin-right: 1rem;
  color: var(--theme-color);
  font-size: 1.2rem;
  position: relative;
  z-index: 1;
}

.category-node .category-name {
  flex: 1;
  font-weight: 600;
  color: var(--text-color);
  font-size: 1.1rem;
  position: relative;
  z-index: 1;
}

.category-node .category-count {
  background: var(--theme-color);
  color: white;
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.85rem;
  font-weight: 700;
  position: relative;
  z-index: 1;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.category-children {
  margin-left: 2.5rem;
  margin-top: 0.8rem;
  border-left: 3px solid var(--theme-color);
  padding-left: 1.5rem;
  position: relative;
}

.category-children::before {
  content: '';
  position: absolute;
  left: -3px;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(to bottom, var(--theme-color), transparent);
}

/* 列表视图样式 */
.categories-list {
  display: grid;
  gap: 1.5rem;
}

.category-list-item {
  background: var(--card-bg);
  border-radius: 15px;
  padding: 2rem;
  box-shadow: var(--card-shadow);
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.category-list-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--theme-color), var(--theme-color-light));
}

.category-list-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(var(--theme-color-rgb), 0.15);
}

/* 卡片视图样式 */
.categories-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.category-card {
  background: var(--card-bg);
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: var(--card-shadow);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: center;
  border: 1px solid var(--border-color);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--theme-color), var(--theme-color-light));
  opacity: 0;
  transition: opacity 0.3s ease;
}

.category-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 12px 35px rgba(var(--theme-color-rgb), 0.2);
}

.category-card:hover::before {
  opacity: 0.05;
}

.category-card .card-icon {
  font-size: 3.5rem;
  color: var(--theme-color);
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 1;
  filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.category-card .card-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-color);
  margin-bottom: 0.8rem;
  position: relative;
  z-index: 1;
}

.category-card .card-count {
  color: var(--text-color-secondary);
  font-size: 1rem;
  font-weight: 500;
  position: relative;
  z-index: 1;
}

/* 无结果提示 */
.no-results {
  text-align: center;
  padding: 4rem 2rem;
  color: var(--text-color-secondary);
  background: var(--hover-bg);
  border-radius: 15px;
  margin: 2rem 0;
}

.no-results i {
  font-size: 4rem;
  margin-bottom: 1.5rem;
  opacity: 0.4;
  color: var(--theme-color);
}

.no-results p {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  font-weight: 500;
}

.no-results small {
  opacity: 0.7;
  font-size: 1rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .categories-container {
    padding: 1.5rem;
    margin: 1rem;
  }
  
  .categories-title {
    font-size: 2.2rem;
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .categories-description {
    font-size: 1rem;
  }
  
  .categories-stats {
    gap: 2rem;
    flex-direction: column;
  }
  
  .stat-item::after {
    display: none;
  }
  
  .categories-filter {
    flex-direction: column;
    align-items: stretch;
  }
  
  .filter-buttons,
  .sort-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .filter-btn,
  .sort-btn {
    font-size: 0.9rem;
    padding: 0.6rem 1.2rem;
  }
  
  .categories-cards {
    grid-template-columns: 1fr;
  }
  
  .category-children {
    margin-left: 1.5rem;
  }
}

@media (max-width: 480px) {
  .categories-container {
    padding: 1rem;
  }
  
  .categories-title {
    font-size: 1.8rem;
  }
  
  .search-box {
    max-width: 100%;
  }
  
  .categories-stats {
    padding: 1rem;
  }
  
  .stat-number {
    font-size: 2rem;
  }
}

/* 动画效果 */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.category-tree-item {
  animation: slideInLeft 0.6s ease forwards;
}

.category-list-item,
.category-card {
  animation: fadeInUp 0.6s ease forwards;
}

.category-tree-item:nth-child(3n+1) {
  animation-delay: 0.1s;
}

.category-tree-item:nth-child(3n+2) {
  animation-delay: 0.2s;
}

.category-tree-item:nth-child(3n+3) {
  animation-delay: 0.3s;
}

.stat-number {
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* 深色模式适配 */
[data-theme="dark"] .categories-container {
  background: var(--card-bg-dark);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .categories-tree,
[data-theme="dark"] .category-list-item,
[data-theme="dark"] .category-card {
  background: var(--card-bg-dark);
  border-color: var(--border-color-dark);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] .category-node:hover,
[data-theme="dark"] .category-list-item:hover,
[data-theme="dark"] .category-card:hover {
  box-shadow: 0 8px 25px rgba(var(--theme-color-rgb), 0.3);
}

[data-theme="dark"] .filter-buttons,
[data-theme="dark"] .sort-buttons {
  background: var(--card-bg-dark);
  border-color: var(--border-color-dark);
}

[data-theme="dark"] .categories-stats {
  background: linear-gradient(135deg, var(--card-bg-dark), var(--hover-bg-dark));
}