.list-tech-img{}
.list-tech-img ul{overflow:hidden;}
.list-tech-img ul li{width:17%;margin:2% 1.5% 0;float:left;}
.list-tech-img ul li .teac-img{position:relative;padding-top:140%;}
.list-tech-img ul li .teac-img img{position:absolute;width:100%;height:100%;top:0;left:0;right:0;bottom:0;}
.list-tech-img ul li p{overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;line-height:45px;text-align:center;}
    
    @media screen and (max-width: 768px){
    
    .list-tech-img ul li{width:30.33333%;margin:2% 1.5% 0;float:left;}
    
    }
     @media screen and (max-width: 480px){
    
    .list-tech-img ul li{width:47%;margin:2% 1.5% 0;float:left;}
    
    }