*{
	box-sizing: border-box;
	margin: 0;
	padding: 0;
}

iframe{
	max-width: 100%;
	max-height: 100%;;
}

.bg,
.phone{
	position: absolute;
}

.bg{
	width: 360px;
	height: 640px;
	z-index: 2;
	top: 50%;
	left: 50%;
	margin: -321px 0 0 -180px;
}

.phone{
	width: 500px;
	height: 900px;
	z-index: 1;
	top: 50%;
	left: 50%;
	margin: -450px 0 0 -250px;
}