body { 
  background-color: rgba(245,245,245,1.00);
  background-image: url('../img/logo_tr.png');
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-position: center; 
  -o-background-size:55% auto;
  -webkit-background-size:55% auto;
  -moz-background-size:55% auto;
  background-size:55% auto;
}
