.sliderEncabezado {
    display: block;
    width:100%;
    margin:auto;
    overflow:hidden;
    height:400px;
}

    .sliderEncabezado .uls {
        display: flex;
        padding:0;
        width:500%;
        height:500px;
        animation: cambio 20s infinite;
    }

    .sliderEncabezado .lis {
        width:100%;
        list-style:none;
    }

    .sliderEncabezado img {
        height:80%;
        width:100%;
        border-radius:10px;
    }

@keyframes cambio {
    0% {margin-left:0;}
    15%{margin-left:0;}

    20% {margin-left: -100%;}
    40%{margin-left: -100%;}

    45% {margin-left:-200%;}
    60%{margin-left:-200%;}

    65% {margin-left: -300%;}
    80%{margin-left: -300%;}

    85% {margin-left: -400%;}
    100%{margin-left: -400%;}
    }
    /*0% {margin-left:0;}
    20%{margin-left:0;}

    25% {margin-left: -100%;}
    45%{margin-left: -100%;}

    50% {margin-left:-200%;}
    70%{margin-left:-200%;}

    75% {margin-left: -300%;}
    100%{margin-left: -300%;}*/