.left{
  display: flex;
  padding: 10px 2px;
  // border-bottom: 3px #3784ca solid;
  background: #f0f0f0;
  margin-bottom: 10px;
  list-style: none;
  li{
    width: 19%;
    border: 1px #a9aabb solid;
    text-align: center;
    font-size: 14px;
    height: 30px;
    line-height: 30px;
    border-radius: 20px;
    margin: 0px 2px;
  }
  li.actived{
    background-color: #ff5a32;
    color: #fff;
    border: 1px #f0f0f0 solid;
  }
}
.materialContainer{
  .materialItem{
    padding: 5px 10px;
    border-bottom: 1px #ddd solid;
    margin-bottom: 8px;
    .title{
      margin-bottom: 8px;
    }
    .date{
      color: #737272;
      font-size: 14px;
      display: flex;
      justify-content: space-between;
    }
  }
  .materialItem:last-child{
    border-bottom: none;
  }
  
}
