.bg_slider{display:none;}
#demo1 {
    display: none;
} .book-lnks{width:960px; float:left;}
.book-lnks ul{float:left; list-style:none;}
.book-lnks ul li{float:left; display:inline-block; border:1px solid red; margin-left:10px;}
.book-lnks ul li img{float:left; display:inline-block; height:100px;}


.copy{font-size:12px;}


#back-to-top a img{
    width:60%;
}

#back-to-top {
  position: fixed;
  bottom: 20px;
  right: 0%;
  float: right !important;
z-index:1000;
}
	#back-to-top a{
		text-align:center;
		text-decoration:none;
		color:#d1d1d1;
		display:block;
		width:80px;
		/*??CSS3??transition?????????????????*/
		-moz-transition:color 1s; 
		-webkit-transition:color 1s;
		-o-transition:color 1s;
	}
	#back-to-top a:hover{
		color:#979797;
	}
	/*#back-to-top a span{
		background:#d1d1d1;
		border-radius:6px;
		display:block;
		height:80px;
		width:80px;
		background:#d1d1d1 url('https://content.onlineagency.com/sites/94729/images/arrow-up.png') no-repeat center center;
		margin-bottom:5px;
		-moz-transition:background 1s;
		-webkit-transition:background 1s;
		-o-transition:background 1s;
	}
	#back-to-top a:hover span{
		background:#979797 url('https://content.onlineagency.com/sites/94729/images/arrow-up.png') no-repeat center center;
	}*/