@media screen and (max-width:768px){
  .first-block{
    background: url("../img/spimg_hal02.jpg");
    background-size: 100% auto;
    background-position: center bottom;
    background-repeat: no-repeat;
  }
  .first-list img{
    padding-top: 1.2em;
    padding-bottom: 1.2em;
  }
  .first-text p{
    font-size: 0.9em;
    padding-right: 0.5em;
  }

  .pc-content{
    display: none;
  }
  .sp-content{
    display: block;
  }
}