@media only screen and (max-width:500px) {
    .p_online_pad .ipt .ipt_name:nth-child(1), .p_online_pad .ipt .ipt_name:nth-child(2){
        width:100% !important;
        font-size:15px !important;
        line-height:20px !important;
        clear:both !important;
    }

    .p_online_pad .ipt .ipt_name input,.p_online_pad .ipt .ipt_name select{
        width:100%;
        max-width: 100% !important;
        font-size:15px !important;
        line-height:20px !important;
        height:30px;
    }
}