.wpb_tabs .ui-widget-content { 
  border:0;
  background:none;
  color:#b1b1b1 !important;
  font-family: inherit !important; 
  font-size: inherit !important;
}

.wpb_tabs .ui-widget-header {
  border: none;
  background: none;
}

.wpb_tabs .ui-state-default, .wpb_tabs .ui-widget-content .wpb_tabs .ui-state-default, .wpb_tabs .ui-widget-header .ui-state-default {
  border: none;
  background: none;
}