.slider{margin:0;overflow:hidden;z-index:9;width:100%}.slider ul,.slider li{list-style-type:none;margin:0;padding:0}.slider ul{width:9999px}.slider ul li{list-style-type:none;float:left;margin-bottom:20px;width:700px}.slider .nav{bottom:20px;left:0;text-align:center;position:absolute;width:100%}.slider .nav span{background:none;border:1px solid #fff;border-radius:8px;box-shadow:0 1px 2px #000;cursor:pointer;display:inline-block;height:16px;margin:0 8px 0 0;opacity:.9;overflow:hidden;width:16px}.slider .nav span.on{background:#fff}