.collapse-selector {
  width: 100%;
  
  .collapse-selector-item {
    margin-bottom: 8px;
    border-radius: 4px;
    overflow: hidden;
    background-color: #f5f5f5;
    border: 1px solid #e8e8e8;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  }

  .collapse-selector-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    cursor: pointer;
    background-color: #f9f9f9;
    transition: background-color 0.3s;
    
    &:hover {
      background-color: #f0f0f0;
    }
  }

  .collapse-selector-title {
    display: flex;
    align-items: center;
    
    .collapse-selector-icon {
      margin-right: 8px;
      font-size: 18px;
      color: #1890ff;
    }
    
    span {
      font-size: 14px;
      font-weight: 500;
      color: #333;
    }
  }

  .collapse-selector-indicator {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 1px solid #ddd;
    position: relative;
    transition: all 0.3s;
    
    &:before, &:after {
      content: '';
      position: absolute;
      background-color: #999;
      transition: all 0.3s;
    }
    
    &:before {
      width: 10px;
      height: 2px;
      top: 8px;
      left: 4px;
    }
    
    &:after {
      width: 2px;
      height: 10px;
      top: 4px;
      left: 8px;
    }
    
    &.active {
      background-color: #1890ff;
      border-color: #1890ff;
      
      &:before, &:after {
        background-color: white;
      }
      
      &:after {
        height: 0;
      }
    }
  }
  
  .collapse-selector-content {
    padding: 0;
    overflow: hidden;
    background-color: white;
    border-top: 1px solid #e8e8e8;
  }
  
  .collapse-selector-content-inner {
    padding: 16px;
    min-height: 80px;
  }
}