Введите:
.wpcf7-response-output{display:none}.wpcf7-form img{top:10px;position:relative}.wpcf7-form p{margin:0;padding:0}.wpcf7-form-control.wpcf7-submit.has-spinner.nav-subtitle{background-color:#268bc5;color:#fff;padding:8px 18px;border-radius:3px;border:0}