@function px2rem($px, $rem:75) {
    @return $px / $rem+rem;
}

html,
body {
    width: 100%;
    height: px2rem(1624, );
    background-color: #BDADFF;
    background-image: url(../images/shareBg.png);
    background-size: 100% px2rem(1624, );
    background-repeat: no-repeat;
    position: relative;
    left: 50%;
    transform: translateX(-50%);
    top: 0;

    img {
        position: absolute;
        width: px2rem(251, );
        height: px2rem(251, );
        border-radius: 50%;
        top: px2rem(660, );
        left: px2rem(292, );
    }
}