body {
font-family:'ヒラギノ角ゴ Pro W3','Hiragino Kaku Gothic Pro','メイリオ',Meiryo,'ＭＳ Ｐゴシック',sans-serif;
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
color: #333333;
}

.page_top {
    position:fixed;
    bottom:10px;
    right:10px;
    padding:10px 20px;
    color:#fff;
    font-size:20px;
    text-decoration:none;
    background:#666;
}
.page_top:hover {
    background:#e74c3c;
}


.alpha a:hover img {
  opacity: 0.6;
  filter: alpha(opacity=60);
  -ms-filter: "alpha(opacity=60)";
}