/*トップへ戻るボタン*/
.topBtn {
  position:fixed; /*固定*/
  bottom:20px; /*場所を右下に移動*/
  right:20px; /*場所を右下に移動*/
  display:block; /*aタグをblock要素に変更*/
  background-color:rgba(0,0,0,0.5); /*以下、デザインはご自由に！！*/
  color:#fff;
  text-decoration:none;
  font-weight:bold;
  font-size:11px;
  width:60px;
  height:60px;
  text-align:center;
  line-height:22px;
  border-radius:30px;
  padding-top:30px;
  box-sizing:border-box;
}
.topBtn:before {
  content:'\25B2';
  position:absolute;
  top:10px;
  left:0;
  width:100%;
  text-align:center;
  font-size:20px;
}
.topBtn:hover {
  opacity:0.7;
}

/*layout*/
/*
.wrapper {
  position:relative; /*topBtnの親要素に指定*/
/*
}
body {
  color:#333;
  font-size:18px;
  line-height:1.8em;
  letter-spacing:0.05em;
}
.header {
  height:40px;
  line-height:40px;
  text-align:center;
  background-color:#eed;
}
.contents {
  margin:40px 40px 60px 40px;
}
.footer {
  height:200px;
  line-height:200px;
  text-align:center;
  background-color:#eed;
}
 */