BODY {
	text-align:center;
font-size:88%;
margin:80px 0px 100px;
}
div {
	text-align:left;
margin-left:auto;
margin-right:auto;
width : 660px;
}
.main {
	text-align:left;
line-height:170%;
padding-bottom:50px;
}
.ps {
	font-size:95%;
line-height:110%;
text-align:right;
}
.dai {
	text-align:center;
margin-bottom:80px;
font-size : 110%;
font-weight:normal;
}
.back {
	font-size:95%;
text-align:center;
}