.page-top { 
    position: fixed; 
    bottom: 20px; 
    right: 20px; 
    padding: 11px; 
    background: #1fbba6; 
    border-radius: 3px; 
    -webkit-border-radius: 3px; 
    -moz-border-radius: 3px; 
    font-size: 12px; 
    -ms-filter: "alpha(opacity=80)"; 
    -moz-opacity: 0.8; 
    -khtml-opacity: 0.8; 
    opacity: 0.8; 
｡｡  color:#ffffff; 
    text-decoration:none; 
}

/*-----------------------------------------------
本文にアコーディオンを作る
-------------------------------------------------*/ 
.mode_2107{
}
.mode_2107 dl{
  width:600px;
  margin:50px auto;
}
.mode_2107 dt{
  line-height:35px;
  font-size:large;
  text-indent:3em;
  font-weight:bold;
  color:white;
  height:35px;
  background:url("background.jpg")
}
.mode_2107 dt.over{
  background:url("background-over.jpg");
  cursor:pointer;
}
.mode_2107 dt.selected{
  background:url("background_selected.jpg");
  cursor:default;
  color:black;
}
.mode_2107 dd.d02,
.mode_2107 dd.d04{
  height:300px;
  background:#D4D0C8;
}
.mode_2107 dd p{
  text-indent:1em;
  padding:20px;
}