使上下左右居中
.box {
height: 60px;
display: flex;
/*左右居中*/
justify-content: center;
/*上下居中*/
align-items: center;
background-color: #F7F5D3;
}
.box {
height: 60px;
display: flex;
/*左右居中*/
justify-content: center;
/*上下居中*/
align-items: center;
background-color: #F7F5D3;
}