.rk_nav
        {
            padding: 20px 0 10px 0;
            border-bottom: 1px dashed #e5e5e5;
        }
        
        .rk_main
        {
            overflow: hidden;
            padding-bottom: 20px;
            border-bottom: solid 1px #e5e5e5;
        }
        
        .rk_main h3
        {
            text-align: center;
            font-weight: normal;
            padding-bottom: 40px;
            margin-bottom: 16px;
            clear: both;
            border-bottom: solid 1px #e5e5e5;
            font-size: 26px;
        }
        
        .rk_detail
        {
            padding: 30px 25px 0;
            width: 670px;
            font-size: 14px;
            color: #999999;
        }
        .rk_l
        {
            float: left;
        }
        .rk_detail li
        {
            margin-bottom: 20px;
        }
        .rk_r
        {
            float: right;
        }
        .rk_price
        {
            font-weight: normal;
            font-size: 20px;
            color: #fd8123;
        }
        .rk_btns
        {
            clear: both;
            text-align: center;
            padding-top: 50px;
        }
        
        .buy_btn
        {
            display: inline-block;
            width: 140px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            font-size: 18px;
            color: #ffffff !important;
            background-color: #fd9e23;
            box-shadow: 0px 4px 4px 0px rgba(253, 129, 35, 0.35);
            border-radius: 20px;
        }
        .lx_btn
        {
            width: 138px;
            height: 38px;
            line-height: 38px;
            border-radius: 20px;
            display: inline-block;
            color: #2590d7 !important;
            font-size: 18px;
            border: solid 1px #2590d7;
            margin: 0 0 0 80px;
        }
        .ks_btn
        {
            display: inline-block;
            width: 140px;
            height: 40px;
            line-height: 40px;
            text-align: center;
            font-size: 18px;
            color: #ffffff !important;
            background-color: #2590d7;
            box-shadow: 0px 3px 3px 0px rgba(79, 174, 235, 0.29);
            border-radius: 20px;
        }
        .rk_intro
        {
            width: 314px;
            height: 246px !important;
            font-size: 14px;
            line-height: 30px;
            box-sizing: border-box;
            padding: 10px 20px 50px;
            background-color: #f2f7fa;
            overflow-y: auto;
        }
        .rk_intro > h4:before, .rk_hot_paper > h3:before
        {
            width: 4px;
            height: 24px;
            left: 0;
            top: 0;
            bottom: 0;
            margin: auto;
            position: absolute;
            content: '';
            background-color: #2590d7;
        }
        .rk_intro > h4, .rk_hot_paper > h3
        {
            position: relative;
            line-height: initial;
            margin-bottom: 10px;
            padding-left: 16px;
            font-size: 18px;
            font-weight: normal;
        }
        
        .rk_hot_paper li
        {
            display: list-item;
            text-align: -webkit-match-parent;
            float: left;
            width: 33%;
            white-space: nowrap;
            text-overflow: ellipsis;
            -o-text-overflow: ellipsis;
            overflow: hidden;
            list-style-position: outside;
            line-height: 40px;
        }
        
@media screen and (max-width: 700px) 
{
   .rk_nav
   {
      padding: 0px 0 10px 0;
      border-bottom: 1px dashed #e5e5e5;
   }
   .rk_main h3
   {
            padding-bottom: 10px;
            margin-bottom: 6px;
            font-size: 16px;
    }
    .rk_detail
    {
            padding: 0px;
            width: 100%;
    }  
    .rk_btns
        {
            padding-top: 1px;
        } 
        
    .lx_btn
        {
            width: auto;
            height: 30px;
            line-height: 30px;
            padding:0px 15px;
            font-size: 14px;
            margin: 0 0 0 20px;
        }
        .ks_btn
        {
            width: auto;
            height: 30px;
            line-height: 30px;
            padding:0px 15px;
            font-size: 14px;
        }
        
        .rk_intro
        {
            clear:both;
            float:none !important;
            width: 100%;
            font-size:12px;
        }
         .rk_intro > h4, .rk_hot_paper > h3
         {
             font-size:14px;
         }
        .rk_l
        {
            margin-bottom:15px;
        }
}