.pllax-bk {
    background-repeat:  no-repeat;
    background-size: cover;
    background-position: center center;
}

.parallax-rellax{
    overflow: hidden;
    position: relative;
    background-repeat:  no-repeat;
    background-size: cover;
    background-position: center center;
}
.rellax{
    position: absolute;
    top:0;
    width: 100%;
    background-repeat: no-repeat;
    background-position: center center;
    background-size: cover;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-direction: column;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-flex-wrap: wrap;
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    -webkit-align-content: center;
    -ms-flex-line-pack: center;
    align-content: center;
    -webkit-align-items: flex-start;
    -ms-flex-align: start;
    align-items: flex-start;
    background-repeat:  no-repeat;
    background-size: cover;
    background-position: center center;
}