.index_one_nn { 
    height: 280px; 
    -moz-transform: translate(-50%, -51%);
    -ms-transform: translate(-50%, -51%);
    -webkit-transform: translate(-50%, -51%);
    transform: translate(-50%, -51%);
}
.index_pro {
    margin-top: 253px;
}
@media(max-width:768px) {
    .banner_nav ul{
        display: block;
    }
    .banner_nav li:nth-child(1){
        width: 100%;margin-bottom: 25px;
    }
    .banner_nav li:nth-child(2), 
    .banner_nav li:nth-child(3){
        float: left;
        width: 50%;
    }
    .index_pro {
        margin-top: 296px;
    }    
    .ft_right input {
        width: 62%;
    }    
    .index_one_nn {
    height: 340px;   
    -moz-transform: translate(-50%, -27%);
    -ms-transform: translate(-50%, -27%);
    -webkit-transform: translate(-50%, -27%);
    transform: translate(-50%, -27%);
        
    }
    .pro_ul li {
        width: 48%; 
        margin: 0 0 9px; 
    }    .banner_nav li h3 { 
        font-size: 14px;
        height: auto;  
    }
    .xs_footer li { 
        font-size: 12px; 
    }    
    .title {
        margin-bottom: 0;
        font-size: 25px;
    }    .n_pro {
        margin-top: 30px;
    }
    .service-bax { 
        margin-top: 10px;
    }
    .adv_content {
        font-size: 13px; 
        margin-top: 6px;
        line-height: 21px;
    }    
    .adv_title {
        font-size: 17px;
        margin-top: 24px;
    }
    .tabs_blist ul {
        display: block;
    }.tabs_blist li {
        float: left;
        width: 33%;
        overflow: hidden;
   }
    .tabs_blist:after{
        content: '';
        clear: both;
        display: block;
    }
   .tabs_blist .tab-teaser-item-headline {
        word-wrap:break-word;
    }
    .n_navbox ul { 
    display: block;
}
}