@media screen and (max-width: 750px){
  body.message .section-message {
      /*background: url(../../message/img/sp/pho02.jpg) no-repeat center center;*/
      background-size: cover;
      height: 910px;
      margin: 600px -40px 0;
      background-position: bottom;
      background-size: contain;
      
  }
}