@keyframes ewk_keyframes_aparecer_de_arriba{
    from{
        opacity: 0;
        top: -150px;
    }
    to{
        opacity: 1;
        top: 0;
    }
}

@keyframes animacion-fondo{
    0%{
        opacity: 0.5;
    }
    20%,80%{
        opacity: 1;
    }
    100%{
        opacity: 0.5;
    }
}

@-webkit-keyframes ewk_keyframes_aparecer_de_arriba{
    from{
        opacity: 0;
        top: -150px;
    }
    to{
        opacity: 1;
        top: 0;
    }
}

@-webkit-keyframes animacion-fondo{
    0%{
        opacity: 0.5;
    }
    20%,80%{
        opacity: 1;
    }
    100%{
        opacity: 0.5;
    }
}