.nav-ul>li{position:relative;}
/* 二级下拉菜单，利用li自带pr(position:relative)定位 */
.nav-submenu{
    position:absolute;
    left:0;
    top:100%;
    min-width:170px;
    background:#ffffff;
    box-shadow:0 3px 14px rgba(0,0,0,0.14);
    z-index:9999;
    display:none;
    list-style:none;
    margin:0;
    padding:0;}
.nav-submenu li{
    float:none;
    border-bottom:1px solid #f1f3f6;}
.nav-submenu li a{
    display:block;
    height:auto !important;
    line-height:42px;
    padding:0 16px;
    color:#333333 !important;
    white-space:nowrap;
    text-decoration:none;}
.nav-submenu li a:hover{
    background:#eaf2fc;
    color:#0059b3 !important;}
/* hover父li显示二级菜单 */
.nav-ul>li.pr:hover .nav-submenu{
    display:block;}
.recentUpdates-cover img{ height:145px;}