.img_top1 {
	background-image: url(img/base/t-syuturyoku.jpg);
	background-repeat: no-repeat;
}
.img_top2 {

	background-image: url(img/base/t-kakou.jpg);
	background-repeat: no-repeat;
}
.img_top3 {


	background-image: url(img/base/t-sign.jpg);
	background-repeat: no-repeat;
}
.img_top4 {



	background-image: url(img/base/t-data.jpg);
	background-repeat: no-repeat;
}
.img_top1-1 {
	background-attachment: fixed;
	background-image: url(img/base/img-1.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}
.img_top1-2 {

	background-attachment: fixed;
	background-image: url(img/base/img-2.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}
.img_top1-3 {


	background-attachment: fixed;
	background-image: url(img/base/img-3.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}
.img_top1-4 {


	background-attachment: fixed;
	background-image: url(img/base/img-4.jpg);
	background-repeat: no-repeat;
	background-position: left bottom;
}