* {
    margin: 0;
    padding: 0;
}

html,
body {
    width: 100vw;
    height: auto;
}

.demo-page-block {
    height:100vh;
    width:100%;
}

.demo-page-block.a {
    background-color: #ECF0F1;
}

.demo-page-block.b {
    background-color: black;
}

.demo-page-block.c {
    background-color: green;
}

.demo-page-block.d {
    background-color: red;
}

.demo-page-block.e {
    background-color: orange;
}

@media (max-width: 750px) {
    body {
        overflow-y: auto!important;
    }
	.mk_scroller_panel {
		display: none;
	}
}