contact form button missing on mobile

Hello friends, I need help with my contact form button. I am using contact form 7, and the submit button missing on mobile. please tell me how to fix it. thanks.
here is my css code:

/* top border on dropdown */
.fusion-main-menu .sub-menu { border-top: 1px solid #ffffff; }

/* Center footer widgets on mobile */
@media only screen and (max-width: 800px) {
.fusion-footer #text-4 .fusion-button-wrapper.fusion-alignright { float: none; margin: 0; }
.fusion-footer #social_links-widget-2 .fusion-social-networks.boxed-icons { text-align: center;}
.fusion-footer .widget .fusion-social-networks.boxed-icons .fusion-social-network-icon:last-child { margin-right: 0;}
.fusion-footer #text-4 { text-align: center; }
.fusion-footer .fusion-columns .fusion-column { margin-bottom: 25px;}
}

.wpcf7-submit{background:#000!important;color:#fff!important;}
.wpcf7-submit:hover{border:1px solid #00afee!important;color:#00afee!important;background:#fff!important;}

The page I need help with: [log in to see the link]