.container{
  width: 100%;
}
.pcCon img{
  width: 100%;
}
.mobCon{
  display: none;
}

@media screen and (max-width:768px) {
  .pcCon{
    display: none;
  }
  .mobCon{
    display: block;
  }
  .mobCon img{
    width: 100%;
  }
}