弹性布局

.bankproduce{
width: 100%;
height: 1072px;
display: flex;
flex-direction: row;
justify-content:space-between;
flex-wrap: wrap;
flex: 3;
align-content: flex-start;
}
.bankproduce_content{
height: 486px;
flex: 0 0 31%;
margin-right: 15px;
margin-left: 15px;
margin-bottom: 40px;
background: #ff6654;
}