.offerBtn {
    transition: all .3s;
}

.offerBtn:hover {
    opacity: 0.8;
}

.offerMiddle {
    width: 84%;
    left: 8%;
    bottom: 5%;
    -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;
}

.offer01 {
    width: 72.3%;
    left: 14%;
    bottom: 22%;
    -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;
}

.offer02 {
    width: 84%;
    left: 8%;
    bottom: 6%;
    -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;
}

.offer03 {
    width: 84%;
    left: 8%;
    bottom: -2.5%;
    z-index: 1;
    -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;
}

.offer04 {
    width: 34%;
    left: 12%;
    bottom: 13%;
    -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;
}

.offer05 {
    width: 34%;
    left: 57%;
    bottom: 13%;
    -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;
}