#wrapper_bu {
  position: absolute;
  width: 100%;
  height: 280px;
}
#wrapper_bu img{
  height: 100%;
}
.txt_Center { margin: 50% 0% 0% 0% }

.txt_h1 { font-size: 2em }

.holder_bu { 
  cursor: pointer;
  text-align: center;
  -webkit-box-shadow: 2px 0px 15px 3px rgba(0,0,0,0.75);
-moz-box-shadow: 2px 0px 15px 3px rgba(0,0,0,0.75);
box-shadow: 2px 0px 15px 3px rgba(0,0,0,0.75);
}

.holder_bu_awayL1 {
  position: absolute;
  top: 30%;
  left: 10%;
  width: 10%;
  height: 40%;
  background-color: #ffffff;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s;
  z-index: 50;
}

.holder_bu_awayL2 {
  position: absolute;
  top: 35%;
  left: 0%;
  width: 10%;
  height: 30%;
  background-color: #ffffff;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s;
  z-index: 25;
}

.holder_bu_center {
  position: absolute;
  top: 5%;
  left: 20%;
  width: 60%;
  height: 90%;
  background-color: #ffffff;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s;
  z-index: 100;
}
.holder_bu_center img{
  width: 100%;
}

.holder_bu_awayR1 {
  position: absolute;
  top: 30%;
  left: 80%;
  width: 10%;
  height: 40%;
  background-color: #ffffff;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s;
  z-index: 50;
}

.holder_bu_awayR2 {
  position: absolute;
  top: 35%;
  left: 90%;
  width: 10%;
  height: 30%;
  background-color: #ffffff;
  -webkit-transition: width 1s, height 1s, top 1s, left 1s;
  -moz-transition: width 1s, height 1s, top 1s, left 1s;
  -o-transition: width 1s, height 1s, top 1s, left 1s;
  -ms-transition: width 1s, height 1s, top 1s, left 1s;
  transition: width 1s, height 1s, top 1s, left 1s;
  z-index: 25;
}