@charset "UTF-8";
/* CSS Document */

.ac {
	background: #fff;
	margin:0 atuo;
	text-align:center;
	background: url(../img/bg.png) repeat left top;
}

.center{
	text-align:center;
}

.contents{
	text-align:center;
}

.contents img{
	max-width: 100%;
}
#btn_back {
	margin-top: 20px;
	text-align: center;
}
.btn_back {
	margin: 20px auto;
	text-align: center;
}

img.btm_txt{
	margin:20px 0 5px;
	vertical-align: bottom;
	max-width: 100%;
	height: auto;
}

._yellow{
	background-color:#f6d521;}