#bnr-area{
  text-align:center;
  padding-bottom:4em;
}
#bnr-area img{
  width:70%;
}
#bnr-area img:hover{
  opacity:0.8;
}
@media screen and (max-width: 750px){
  #bnr-area img{
    width:90%;
  }
}