.offerBtn {
    transition: all .3s;
}

.offerBtn:hover {
    transform: translateY(5px);
    opacity: 0.8;
}

.offerMiddle01 {
    width: 60%;
    left: 24%;
    bottom: 7%;
}

.offerMiddle02 {
    width: 45%;
    left: 14.5%;
    bottom: 7.5%;
}

.offer01 {
    width: 37%;
    left: 7.8%;
    bottom: 2.5%;
    -webkit-mask: url("../images/btnA.png") no-repeat center center;
    mask: url("../images/btnA.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}

.offer02 {
    width: 37%;
    right: 7.25%;
    bottom: 2.5%;
    -webkit-mask: url("../images/btnB.png") no-repeat center center;
    mask: url("../images/btnB.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}
.offer03 {
    width: 88%;
    right: 6%;
    bottom: 1.5%;
    -webkit-mask: url("../images/btnC.png") no-repeat center center;
    mask: url("../images/btnC.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}
.offer04 {
    width: 88%;
    right: 6%;
    bottom: 2.5%;
    -webkit-mask: url("../images/btnD.png") no-repeat center center;
    mask: url("../images/btnD.png") no-repeat center center;
    -webkit-mask-size: contain;
    mask-size: contain;
}