/**
 * 基于视口的解决方案
 */

main {
	width: 18em;
	padding: 1em 1.5em;
	margin: 50% auto 0;
	transform: translateY(-50%);
	box-sizing: border-box;
	background: #655;
	color: white;
	text-align: center;
}

h1 {
	margin: 0 0 .2em;
	font-size: 150%;
}

p {
	margin: 0;
}

body {
	background: #fb3;
	font: 100%/1.5 sans-serif;
}