/*右侧悬浮导航*/
.float{width:111px;height:504px;position:fixed;left:50%;_position:absolute;display:none;overflow:hidden;margin-left:515px; z-index:50}/*left50%确保页面中间，左边距515大于页面内容的一半，确保在内容整体右侧外*/
.float a{display:block;text-indent:-9999px;overflow:hidden;height:42px; background:url(../images/a.png) no-repeat;-webkit-transition:background 0.2s ease}
.float .an_1:hover{background-position:-111px 0}
.float .an_2{background-position:-222px 0}
.float .an_2:hover{background-position:-333px 0}
.float .an_3{background-position:-444px 0}
.float .an_3:hover{background-position:-555px 0}
.float .an_4{background-position:-666px 0}
.float .an_4:hover{background-position:-777px 0}
.float .an_5{background-position:-888px 0}
.float .an_5:hover{background-position:-999px 0}
.float .an_6{background-position:-1110px 0}
.float .an_6:hover{background-position:-1221px 0}
.float .an_7{background-position:-1332px 0}
.float .an_7:hover{background-position:-1443px 0}
.float .an_8{background-position:-1554px 0}
.float .an_8:hover{background-position:-1665px 0}
.float .an_9{background-position:-1776px 0}
.float .an_9:hover{background-position:-1887px 0}