#nav .sub-menu {
    margin-bottom: 10px;
    display: none;
    margin-left: 15px;
}

#nav .active .sub-menu { display: block; }
#nav > li > a.sub { border-bottom: 1px solid #ccc; padding-bottom: 5px; margin-bottom: 10px !important; }
#nav > li { position: relative; }
#nav > li > .expand {
    position: absolute;
    top: 0;
    right: 0;
}
#nav .sub-menu a { color: #888; font-weight: 500; }