.top_bg {
  float: left;
  
  min-height:300px;
  /*top:5%;
  bottom:5%;
  right: 5%;
  left: 5%;
  z-index: 10;*/
  margin-top: 5%;
  background-color: rgba(230,190,190,0.5);

  border-radius: 140px;        /* CSS3草案 */  
  -webkit-border-radius: 140px;    /* Safari,Google Chrome用 */  
  -moz-border-radius: 140px;   /* Firefox用 */ 

  /* color: #fff; */
  text-align: center;
  /*text-shadow: 0 1px 2px rgba(0, 0, 0, .6); */
}
.modal-body{
	max-height: 300px;
	overflow-y: scroll;
	font-size:1.0em;
}
::-webkit-scrollbar {
    -webkit-appearance: none;
    width: 7px;
}
::-webkit-scrollbar-thumb {
    border-radius: 4px;
    background-color: rgba(0,0,0,.5);
    box-shadow: 0 0 1px rgba(255,255,255,.5);
}