div#galeria{
  margin-top: 20px;
}

ul{
list-style: none outside none;
  padding-left: 0;
      margin: 0;
}
  .demo .item{
      margin-bottom: 60px;
  }
.content-slider li{
  background-color: #ed3020;
  text-align: center;
  color: #FFF;
}
.content-slider h3 {
  margin: 0;
  padding: 70px 0;
}

.demo{
width: 900px;
margin-left: auto;
margin-right: auto;
}

.imagenGrande{
  height: 500px;
  width: 900px;
}

@media only screen and (max-width: 907px) {
  .demo{
    width: 100%;
  }

  .container{
    width: 100%;
  }

  .imagenGrande{
    height: 80%;
  }
}