媒体查询

例如：

@media (min-width:750px) and (max-width:1920px){

   ._td_box>tr>th:nth-child(1){

        width: 60vw;

    }

    ._td_box>tr>th:nth-child(2){

        width: 40vw;

    }

}

 

 

 

来源：https://www.cnblogs.com/dongyuezhuang/p/11641548.html