/*returnTop*/
p#back-to-top{
    position:fixed;
    display:none;
    bottom:100px;
    right:40px;
}
p#back-to-top a{
    text-align:center;
    text-decoration:none;
    color:#d1d1d1;
    display:block;
    width:64px;

    -moz-transition:color 1s;
    -webkit-transition:color 1s;
    -o-transition:color 1s;
}
p#back-to-top a:hover{
    color:#979797;
}
p#back-to-top a span{
    background:transparent url(/Public/Image/top/top_arrow.png?150501) no-repeat top right;
    border-radius:6px;
    display:block;
    height:64px;
    width:57px;
    margin-bottom:5px;

    -moz-transition:background 1s;
    -webkit-transition:background 1s;
    -o-transition:background 1s;
}
#back-to-top a:hover span{
    background:transparent url(/Public/Image/top/top_arrow.png?150501) no-repeat top right;
}