/* 分类容器样式 */
.category-container {
  max-width: 1200px;
  margin: 0 auto;
  background-color: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  padding: 20px;
}

/* 标题样式 */
.category-title {
  font-size: 24px;
  color: #333;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e0e0e0;
}

/* 一级分类容器样式 */
.level-1-wrapper {
  position: relative;
  margin-bottom: 20px;
  overflow: hidden;
}

/* 一级分类样式 */
.level-1 {
  display: flex;
  gap: 10px;
  padding-bottom: 10px;
  transition: max-height 0.5s ease;
}

/* 默认只显示一排 */
.level-1.collapsed {
  max-height: 50px;
  /* 刚好容纳一排的高度 */
}

.level-1.expanded {
  max-height: 500px;
  /* 足够容纳所有分类的高度 */
  flex-wrap: wrap;
}

.level-1-item {
  padding: 10px 20px;
  background-color: #4285f4;
  color: white;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 500;
  white-space: nowrap;
  /* 防止分类名换行 */
}

.level-1-item:hover,
.level-1-item.active {
  background-color: #3367d6;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* 展开/收起按钮 */
.toggle-btn {
  position: absolute;
  right: 0;
  bottom: 0;
  background-color: rgba(255, 255, 255, 0.9);
  border: 1px solid #e0e0e0;
  border-radius: 4px 0 0 0;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 14px;
  color: #4285f4;
  box-shadow: -2px 0 5px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  z-index: 10;
}

.toggle-btn:hover {
  background-color: white;
  color: #3367d6;
}

/* 二级分类样式 */
.level-2-container {
  border-left: 3px solid #4285f4;
  padding-left: 15px;
  margin-bottom: 20px;
  display: none;
}

.level-2-container.active {
  display: block;
}

.level-2 {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.level-2-item {
  padding: 8px 16px;
  background-color: #f1f3f4;
  color: #333;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.level-2-item:hover,
.level-2-item.active {
  background-color: #e8eaed;
  color: #4285f4;
  font-weight: 500;
}

/* 三级分类样式 */
.level-3-container {
  display: none;
  background-color: #f8f9fa;
  border-radius: 4px;
  padding: 15px;
}

.level-3-container.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

.level-3 {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 15px;
}

.level-3-item {
  padding: 12px;
  background-color: white;
  border: 1px solid #e0e0e0;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
}

.level-3-item:hover {
  border-color: #4285f4;
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.level-3-item.active {
  border-color: #4285f4;
  background-color: #f0f7ff;
}

/* 空状态样式 */
.empty-state {
  color: #70757a;
  padding: 30px;
  text-align: center;
  background-color: #f8f9fa;
  border-radius: 4px;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

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

/* 响应式设计 */
@media (max-width: 768px) {
  .level-3 {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }

  .level-1-item,
  .level-2-item {
    padding: 8px 12px;
    font-size: 14px;
  }

  .category-title {
    font-size: 20px;
  }

  .toggle-btn {
    font-size: 12px;
    padding: 3px 8px;
  }
}