.how img{
  max-width: 100%;
}
.child_main h2{
  background: url('../img/how/how_back.jpg') center;
  background-size: cover;
}
.how p{
  font-size: 14px;
}
.left, .right{
  margin: auto;
  margin-bottom: 20px;
  transition: .5s;
  transition-delay: .5s;
}