.nav{
  overflow: hidden;
  width: 100%;
  overflow-x: auto;
  .left{
    padding: 10px 2px;
    background: #f0f0f0;
    margin-bottom: 10px;
    float: left;
    width: 120%;
    overflow: hidden;
    overflow-x: auto;
    list-style: none;
    li{
      border: 1px #a9aabb solid;
      text-align: center;
      font-size: 14px;
      height: 30px;
      line-height: 30px;
      border-radius: 20px;
      margin: 0px 2px;
      float: left;
      width: 15.7%;
    }
    li.actived{
      background-color: #ff5a32;
      color: #fff;
      border: 1px #f0f0f0 solid;
    }
  }
}
.nav::-webkit-scrollbar{                    
  opacity: 0;
  }

.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;
  }
  
}
