#fondo {
	background-image: url("https://qcmanager.cl/Mantencion/Img/fruta-fresca.jpg");
	height: 100vh;
	text-align: center;
	background-position: center center;
	background-size: cover;
	background-repeat: no-repeat;
	position: relative;
}


#fondo:before {
	content:'';
	position: absolute;
    top: 0;
	bottom: 0;
	left: 0;
	right: 0;
	background-color: rgba(0,0,0,0.2);
    position: relative;
}



.img-mantencion{
    width: 60%;
    height: 90%;
    margin: auto;
}


@media(max-width: 1260px) {
    .img-mantencion {
        width: 60%;
        height: 90%;
        margin: auto;
    }
}


@media(max-width: 950px) {
    .img-mantencion {
        width: 90%;
        height: 90%;
        margin: auto;
    }
}


@media(max-width: 520px) {
    .img-mantencion {
        width: 100%;
        height: 90%;
        margin: auto;
    }
}



@media(max-width: 340px) { 
    .img-mantencion {
        width: 99%;
    }
}




.div-imagen{
    width: 60%;
    height: 90%;
    margin: auto;
}


@media(max-width: 1260px) {
    .div-imagen {
        width: 60%;
        height: 90%;
        margin: auto;
    }
}


@media(max-width: 950px) {
    .div-imagen {
        width: 90%;
        height: 90%;
        margin: auto;
    }
}


@media(max-width: 520px) {
    .div-imagen {
        width: 100%;
        height: 90%;
        margin: auto;
    }
}



@media(max-width: 340px) {  
    .div-imagen {
        width: 99%;
    }
}