.pro-affix {
    position:relative;
    transition: 0.3s all ease-in-out;
    box-sizing: border-box;
    z-index: 10;
    &--fixed {
        position: fixed !important;
        
    }
    &--absolute{
        position:absolute !important;
    }

    &--relative{
        position:relative !important;
    }
}