.bj{
  background: #fafafa;
  height: 100vh;
}
.top{
  width: 750rpx;
  height:380rpx;
  position: absolute;
  top: 0;
  left: 0;
}
.middle{
  display: flex;
  flex-direction:row;
  flex-wrap:wrap; 
  /* border: 1px solid red; */
  width: 100%;
}
.block{
  width: 330rpx;
  height: 180rpx;
  background: #fff;
  margin-left: 30rpx;
  margin-top: 30rpx;
  border-radius: 30rpx;
  display: flex;
  /* justify-content:space-around; */
  align-items: center;
}
.tabbar {
  width: 750rpx;
  border: 1px solid #999;
  height: 100rpx;
  position: fixed;
  bottom: 0;
  left: 0;
  display: flex;
  font-size: 28rpx;
}

.tab1 {
  height: 100rpx;
  width: 250rpx;
  text-align: center;
  color: #999999;
}