delivery-customer/pages/newUser/newUser.wxss

van-dropdown-menu{
  display: flex; 
  margin-left: 150px;
}
.a{
  width:40%;
  padding-top: 12px;
  padding-left: 10px;
  color:rgba(82, 79, 79, 0.829);
  font-size: 14px;
}
.b{
  display: flex; 
  flex-wrap:nowrap;
}
.c{
  width:60%;
  margin-left: 110px;
}