.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 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(3, 1fr);
  grid-row-gap: 10px;
  grid-column-gap: 10px;
  
  .materialItem {
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: #f7f7f7;
    padding: 14px;
    box-sizing: border-box;
    .title {
      font-size: 12px;
      line-height: 1.1;
    }
  }
}
