#scroll {
    position:fixed;
    right:16px;
    bottom:72px; /* 高度*/
    cursor:pointer;
    width:20px;
    height:45px;

    background-color: #D619E8;
    text-indent:-9999px;
    display:none;

    -webkit-border-radius:5px;
    -moz-border-radius:5px;
    border-radius-top:5px;
}
	@media only screen and (orientation: landscape) {
#scroll {
   bottom:5px;
  }
}

#scroll span {
    position:absolute;
    top:45%;
    left:50%;
    margin-left:-8px;
    margin-top:-12px;
    height:0;
    width:0;
    border:8px solid transparent;
    border-bottom-color:#ffffff;
}
#scroll span:before {
     display:block;
    content:'';
    border-width:8px 8px 8px 8px;
    border-style:solid;
    border-color:transparent transparent #ff4d4d transparent;
    
    /* 定位 */
    position:relative;
    right:8px;
    top:-35px;
		
	}
#scroll:hover {
    background-color:red;
    opacity:1;
    filter:"alpha(opacity=100)";
    -ms-filter:"alpha(opacity=100)";
}