.zhongbu{width:96%;padding:0}.zhongbu .zhongbu_zuo{width:100%}.nrk .nrk_z .nrk_z_user{width:20%}.nrk .nrk_z .nrk_z_neirong{width:80%}.pmk_da_show{display:none}.pmk_sj_show{display:block}