.code
{
    background: aliceblue;
    border: #c0c0c0 1px solid;
    padding: 5px;
    margin: 2px 1px 2px 1px;
    font-family: Lucida Console, 文泉驿等宽微米黑, Monospace;
}

h2 {
	margin-top: 18px;
	margin-bottom: 12px;
	padding: 5px;
	color:white;
	background-color: gray;
}