.offerBtn {
    transition: all .3s;
}

.offerBtn:hover {
    opacity: 0.8;
}

.offer01 {
    width: 99.1%;
    left: 0.5%;
    bottom: 9%;
}

.offer02 {
    width: 99.1%;
    left: 0.5%;
    bottom: 7.5%;
    -webkit-mask: url("../images/23_btn.png") no-repeat center center;
    mask: url("../images/23_btn.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.offer03 {
    width: 99.1%;
    left: 2.5%;
    bottom: 8%;
    -webkit-mask: url("../images/24_btn.png") no-repeat center center;
    mask: url("../images/24_btn.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.offer04 {
    width: 99.1%;
    left: 0.5%;
    bottom: 5%;
    -webkit-mask: url("../images/25_btn.png") no-repeat center center;
    mask: url("../images/25_btn.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.offer05 {
    width: 99.1%;
    left: 2.5%;
    bottom: 9.5%;
    -webkit-mask: url("../images/26_btn.png") no-repeat center center;
    mask: url("../images/26_btn.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}