<div class="campos-formulario">
    <div class="form-group">
         [text* your-name class:form-control placeholder "NOME"]
    </div>
    <div class="form-group">
         [email* your-email class:form-control placeholder "SEU E-MAIL"]
    </div>
    <div class="form-group">
         [textarea* your-message class:form-control class:text placeholder "MENSAGEM"]
    </div>
    <div class="form-group">
         [submit class:btn class:btn-success "ENVIAR"]
    </div>
</div>