body
{
	background-attachment: fixed;
	overflow-x: hidden;
	left: 10%;
	width: 80%;
	position: relative;
	background-repeat: repeat;
	background-image:url(bg.png);
	margin: -5px 0 0 0;
}
.main
{
	position: relative;
	font-size: 36px;
	color: #FFF;
	text-align: center;
	margin: -1880px 0 0 0;

	font-family: 'Tahoma', 'Microsoft Yahei', 'PingFang';
}
.bg
{
	position: relative;
	left: 50%;
	height: 1900px;
	margin: 0 0 0 -500px;
	background-image:url(bg_loop.png);
	background-repeat:repeat-y;
}