SOURCE

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*{
	margin:0;
	padding:0;
	
}
body{
	font-size:15px;
	font-family: SimHei;
}
.a{
	font-size:1em;
	border: 1px solid red;
	vertical-align:text-bottom;
	padding-bottom:0px;
	padding-top:0px;
	
}


div {
	display: inline;
	border: 1px solid red;
	vertical-align:;
	font-size:15px;
	line-height:3em;
	

}
em {
	border: 1px solid blue;
}