.item-4 {
     flex-wrap: wrap;
     margin-top: 60px;
 }

 .item-4 .flex-item {
     padding-right: 16px;
     margin-bottom: 80px;
     width: 25%;
     box-sizing: border-box;
 }

 .item-4 .flex-item:nth-child(4n) {
    padding-right: 0;
 }

 .item-4 .flex-item img{
    max-width: 286px;
max-height: 142px;
display: block;
margin: 0 auto  12px;
}
.item-4 .flex-item p{
    font-family: SourceHanSansCN-Normal;
    font-size: 14px;
    color: #071C2F;
    text-align: center;
    line-height: 20px;
    font-weight: 400;
}