.about-navigation .navigation_item{
      position: relative;
      padding: 0 40px 0 20px;
      height: 60px;
      line-height: 60px;
      width: 180px;
      background: #fff;
      overflow: hidden;
}
.about-navigation .navigation_item.navigation_item_line{
      border-bottom: 1px solid #D8D8D8;
}
.list_dt_icon{
      position: absolute;
      right: 10px;
      top: 24px;
      display: block;
      width: 15px;
      height: 15px;
      background: url("/themes/mall/jd2014/styles/default/images/about_tyfon/arrow_hide.png") no-repeat;
      background-size: contain;
      cursor: pointer;
}
#open .list_dt_icon{
      background: url("/themes/mall/jd2014/styles/default/images/about_tyfon/arrow_show.png") no-repeat;
      background-size: contain;
      cursor: pointer;
}
.about-navigation  .navigation_item_top .title{
      font-size: 20px;
      color: #333333;
      font-weight: bold;
}
.about-navigation  .navigation_item_bottom{
      width: 180px;
      background: #fff;
      overflow: hidden;
      display: none;
}
.about-navigation .navigation_item_bottom  a{
      border-left: 2px solid transparent;
      display: inline-block;
      width: 100%;
      height: 50px;
      line-height: 50px;  
}
.about-navigation .navigation_item_bottom  p.text{
      color:  #337ab7;
      margin: 0;
      padding-left: 30px;
      font-size: 16px;
}
.about-navigation  .navigation_item_bottom a:hover,.about-navigation .navigation_item_bottom a.active{
      background:#F9F9F9;
      color: #337ab7;
      cursor: pointer;
      border-left: 2px solid #337ab7;
}