@charset "utf-8";

.theDiv {
	height: 700px; /* div的高度 */
	width: 960px;/* div的寬度 */
	position: absolute;
	top: 50%;
	left: 50%;/* 邊界減去一半的寬高 */
	margin-top: -350px;
	margin-right: 0;
	margin-bottom: 0;
	margin-left: -480px;
	
}