.ps_rl {
    position: relative;
}

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

.bk_btn {
    bottom: 1rem;
    left: 2.05rem;
    width: 3.4rem;
    height: 1rem;
}

.xz_btn {
    bottom: 2.4rem;
    left: 3.2rem;
    width: 1.1rem;
    height: 0.4rem;
}