.offerBtn {
  transition: all 0.3s;
}

.offerBtn:hover {
  opacity: 0.8;
}
.item15-1 {
  top: 52.7%;
  left: 68%;
  width: 33.8%;
  -webkit-mask: url("../images/thing_25.png") no-repeat center center;
  mask: url("../images/thing_25.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item15-2 {
  top: 70.5%;
  left: 71%;
  width: 27.8%;
}
.item15-3 {
  top: 86%;
  left: 2%;
  width: 96.2%;
}
.item15-3_mask {
  -webkit-mask: url("../images/btn_01.png") no-repeat center center;
  mask: url("../images/btn_01.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item16-1 {
  top: 43.15%;
  left: 69.8%;
  width: 28.9%;
  -webkit-mask: url("../images/thing_28.png") no-repeat center center;
  mask: url("../images/thing_28.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item16-2 {
  top: 63%;
  left: 51%;
  width: 27.8%;
}
.item16-3 {
  top: 79%;
  left: 2%;
  width: 96.2%;
}
.item16-3_mask {
  -webkit-mask: url("../images/btn_02.png") no-repeat center center;
  mask: url("../images/btn_02.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item17-1 {
  top: 32%;
  left: 70%;
  width: 28.9%;
  -webkit-mask: url("../images/thing_29.png") no-repeat center center;
  mask: url("../images/thing_29.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item17-2 {
  top: 51%;
  left: 12%;
  width: 76.2%;
}
.item17-2_mask {
  -webkit-mask: url("../images/btn_03.png") no-repeat center center;
  mask: url("../images/btn_03.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}
.item17-3 {
    top: 70%;
    left: 69%;
    width: 21.4%;
    -webkit-mask: url("../images/thing_30.png") no-repeat center center;
    mask: url("../images/thing_30.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}
.item17-4 {
  top: 85%;
  left: 12%;
  width: 76.2%;
}
.item17-4_mask {
  -webkit-mask: url("../images/btn_03.png") no-repeat center center;
  mask: url("../images/btn_03.png") no-repeat center center;
  -webkit-mask-size: contain;
  mask-size: contain;
}