.logo {
    width: 155px;
    height: 80px;
    top: 30px;
    margin-left: -350px;
}

.slognBtn {
    width: 450px;
    height: 100px;
    display: block;
    background: url(about:blank);
    text-indent: -999px;
    overflow: hidden;
    position: absolute;
    left: 50%;
    top: 25px;
    margin-left: -70px;
    z-index: 1
}