银色条纹形状效果图；不要表现出形式或任何风格

我正试图用以下模板呈现一个表单：

function FacebookForm($fbFields) {
        $actions = new FieldSet(
            new FormAction('doFaceBookForm', 'Register')
        );
        $memberfields = singleton('XEUser')->getMemberFormFields();
        $fields = new FieldSet();
        $reqFields = array();
        foreach($fbFields as $key => $value){
            switch($value){
                case 'Gender':
                    $fields->push($memberfields->fieldByName('Gender'));
                    $reqFields[] = 'Gender';
                    break;
                case 'DateOfBirth':
                    $fields->push($memberfields->fieldByName('DateOfBirth'));
                    $reqFields[] = 'DateOfBirth';
                    break;
            }
        }
        $validator = new RequiredFields($reqFields);
        $form = new Form($this, 'FaceBookForm', $fields, $actions,$validator);
        $form->disableSecurityToken();
        return $form->renderWith(array('FacebookController','Page'));
        //return $form;
    }

当我只return $form时，我的表单出现在默认的contentController.ss中，所以我创建了一个新模板并添加了return $form->renderWith(array('FacebookController','Page'));。当我这样做时，我会得到页面中应该有的所有内容，但根本没有应用任何样式，表单甚至不会出现。这是我的FacebookController模板：

<div id="left">
    <h2>Thankyou for signing up with your Facebook account</h2>
    <p>The following details could not be obtained from your Facebook account, please enter them now.</p>
    $form
</div>
<div id="right">
</div>

有人能说明这件事吗？