.nzsidebar{z-index: 9999;position: fixed;right: 30px;bottom: 10px;line-height: 38px;text-align: center;cursor: pointer;font-size: 20px;}
.nzsidebar a{color:#fff;}
.nzsidebar .back-top {width: 40px;height: 40px;-webkit-transition: all 400ms linear 0ms;-ms-transition: all 400ms linear 0ms;-o-transition: all 400ms linear 0ms;transition: all 400ms linear 0ms;filter:alpha(opacity=0);-moz-opacity:0;-khtml-opacity: 0;opacity: 0;}
.nzsidebar .item{width: 40px;height: 40px;-webkit-transition: all 400ms linear 0ms;-ms-transition: all 400ms linear 0ms;-o-transition: all 400ms linear 0ms;transition: all 400ms linear 0ms; filter:alpha(opacity=40);-moz-opacity:0.4;-khtml-opacity: 0.4;opacity: 0.4;}
.nzsidebar .back-top.show {opacity: 0.4;padding-top: 0;}
.nzsidebar .back-top:hover , .nzsidebar .item:hover, .nzsidebar .back-top.show:hover{filter:alpha(opacity=80);-moz-opacity:0.8;-khtml-opacity: 0.8;opacity: 0.8;}
.item_content{font-size:14px;height:40px;line-height:40px;padding:0 15px;background-color: #000;color: #fff;position:absolute;z-index:99999;text-align: center;display:none;-moz-opacity:0.8;-khtml-opacity: 0.8;opacity: 0.8;}