body { margin: 0; padding: 0; word-break:break-all;font-family:"メイリオ", Meiryo,"ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN", Verdana, Roboto, "Droid Sans", "游ゴシック", YuGothic, "ＭＳ Ｐゴシック", sans-serif;}
.container{ position:relative; width:100%;height:100%;}
.demobox{ position:absolute; /*border: 1px solid #0012ff;*/ width:728px; height: 500px; left:50%;margin-left:-364px;}
 .rtunbtn{ position:relative; border: 1px solid #d5af00;background-color:#ffd89b;font-size:0.875em; top:520px; width:180px; left:50%; margin-left:-90px;text-align:center;
	-webkit-border-radius: 3px 3px 3px 3px / 3px 3px 3px 3px; -o-border-radius: 3px 3px 3px 3px / 3px 3px 3px 3px; -ms-border-radius: 3px 3px 3px 3px / 3px 3px 3px 3px; border-radius:3px 3px 3px 3px / 3px 3px 3px 3px;
}
.rtunbtn a{ text-decoration:none;}
.rtunbtn:hover, .rtunbtn:focus, .rtunbtn:active { cursor:pointer;}
.rtunbtn:hover a{color:#ff0000;}

@media screen and (max-width: 728px){
  .demobox{ width:100%; margin-left:-50%;}
}