.rules {
    width:50%;
    min-width: 800px;
    margin: 20px auto;
    padding: 20px;
	background: #fff;
	border-radius: 4px;
	font-size: 14px;
	overflow: hidden;
	font-weight: 300;
    font-family:arial, verdana, microsoft yahei;
    box-shadow: 0 12px 8px -8px rgba(0,0,0,.2), 0 2px 2px 0 rgba(0,0,0,.14), 0 1px 5px 0 rgba(0,0,0,.12);
}