body{
	background:url('../image/bg.jpg') no-repeat;
	background-size: 100% 100%;
}

.Lpheader { width: 100%; height: auto}
.Lpheader img{ width: 100%; height: auto}
.dongl{ position: relative; width: 100%; z-index: 2}
.ding_img{ width: 1241px; position:absolute; left: 50%; bottom: 0px; margin-left: -620.5px;}

.Lpbox_main{ width: 1241px; margin: 0 auto; position: relative; top: -275px; z-index: 1}