@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; }
}