div,body,p,span,form,input,ul,li,a,i,select,textarea,img{margin:0;padding:0;}
img{border:none}
input{border:none}
a{text-decoration: none;color:#333}
a:link{text-decoration:none;}
*:focus{outline: none}
ul{list-style: none}
i,em{font-style: normal}
h1,h2,h3,h4,h5,h6{font-weight: normal;margin:0;padding:0;}
textarea{resize:none}
.l_float{float: left}
.r_float{float: right}
.clear{clear: both}
.hide{display: none!important;}
body{font-family: 微软雅黑, Arial;font-size:14px;overflow-x: hidden}

.product_main{

    border-bottom: 1px solid #cccccc;
}
.product_nav{
    padding-left:15%;
    /*width:80%;*/
    /*margin:0 auto;*/
}
.product_nav>li{
    margin-top: 20px;
    width:220px;
    float: left;
    line-height:60px;
}
.logo_xsj{
    padding-left: 20px;
    padding-top: 5px;
}
.product_list{
    display: block;
    text-align: center;
    border:1px solid #fff;
    cursor: pointer;
    position: relative;
}
.product_nav .product_list ul{
    position: absolute;
    border: 1px solid #cccccc;
    width:100%;
    background: #fff;
    z-index: 999;
}
.product_nav .product_list ul li a{
    display: block;
    line-height:36px;
    text-align: left;
    font-size:16px;
    color:#666;
    padding:0 20%;
}
.product_nav .product_list ul li a:hover{
    background: #ccc;
}
.product_nav .product_list .product_current{
    background: #ccc;
}
.product_list>span{
    float: right;
    color:#e6e6e6;
    font-size:20px;
}

@media screen and (max-width: 1024px){
    .product_nav > li{
        width:200px;
    }
    .product_content_l > div img{
        height:257px;
    }
}

@media screen and (max-width: 768px) {
    .product_nav > li {
        width: 220px;
    }
    .two{
        display: none;
    }
}