<view class="zrf"></view>

page{  
height: 100%; 
background: #ffffff;
}
.zrf{
position:relative;
top:20rpx;
width: 92%;
height: 200rpx;
left: 4%;
display: inline-block;
box-shadow:0rpx 2rpx 5rpx 5rpx #c8c3c3;}