@charset "utf-8";
@media only screen and (max-width:767px){
  body {
background-color:#ffffff;
background-image:url(https://www.bell-s-rg.com/website/w7216/image/bg_sp_image_name.jpg);
background-position: 50% 0%;
background-repeat: repeat;
  }
}
@media only screen and (min-width:768px){
  body {
background-color:#ffffff;
background-image:url(https://www.bell-s-rg.com/website/w7216/image/bg_pc_image_name.jpg);
background-position: 50% 0%;
background-repeat: repeat;
  }
}