footer {
    position: relative !important;
}

.ps_st {
    position: sticky;
    position: -webkit-sticky;
    bottom: 0;
}

.ps_st > a {
    display: inline-block;
    position: absolute;

}

.button_png {
    position: absolute;
    width: 4rem;
    height: 1rem;
    bottom: 1rem;
    left: 1.8rem;
}

.sq_btn {
    bottom: 1rem;
    left: 1.9rem;
    width: 3.75rem;
    height: 0.77rem;
    animation: btnScale 1.2s infinite linear;
    -webkit-animation: btnScale 1.2s infinite linear;
    -moz-animation: btnScale 1.2s infinite linear;
    -ms-animation: btnScale 1.2s infinite linear;
    -o-animation: btnScale 1.2s infinite linear;
}

.xz_btn {
    bottom: 0.28rem;
    left: 3.25rem;
    width: 1rem;
    height: 0.45rem;
}

@keyframes btnScale {
    0% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        -webkit-transform: scale(1.05);
        -moz-transform: scale(1.05);
        -ms-transform: scale(1.05);
        -o-transform: scale(1.05);
    }

    100% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }
}

@-webkit-keyframes btnScale {
    0% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        -webkit-transform: scale(1.05);
        -moz-transform: scale(1.05);
        -ms-transform: scale(1.05);
        -o-transform: scale(1.05);
    }

    100% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }
}

@-moz-keyframes btnScale {
    0% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        -webkit-transform: scale(1.05);
        -moz-transform: scale(1.05);
        -ms-transform: scale(1.05);
        -o-transform: scale(1.05);
    }

    100% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }
}

@-ms-keyframes btnScale {
    0% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        -webkit-transform: scale(1.05);
        -moz-transform: scale(1.05);
        -ms-transform: scale(1.05);
        -o-transform: scale(1.05);
    }

    100% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }
}

@-o-keyframes btnScale {
    0% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }

    50% {
        transform: scale(1.05);
        -webkit-transform: scale(1.05);
        -moz-transform: scale(1.05);
        -ms-transform: scale(1.05);
        -o-transform: scale(1.05);
    }

    100% {
        transform: scale(0.95);
        -webkit-transform: scale(0.95);
        -moz-transform: scale(0.95);
        -ms-transform: scale(0.95);
        -o-transform: scale(0.95);
    }
}