.his_box{
  text-align: center;
  background: #f4f4f4;
  padding: 80px 0;
}

.his_box > div{
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

@media screen and (max-width:768px){
  .his_box{
    text-align: center;
    background: #f4f4f4;
    padding: 10vw 0;
  }
}