fancybox缩略图的灵敏填充

http://i.imgur.com/wcw0FN1.png

当我调整视口大小时,缩略图占据了所有12列,但在每一侧都添加了大量填充。这里有一张图片供参考: http://i.imgur.com/2HePovc.png

<div class="col-sm-6  top__767 center__767">
                            <div class="row">
                                <div class="col-sm-12  col-md-6">
                                    <a class="thumbnail fancybox" rel="" href="images/sommerhuse/2.jpg">
                                        <img class="img_wr" alt="" src="images/sommerhuse/2.jpg" />
                                    </a>
                                </div>
                                <div class="col-sm-12  col-md-6">
                                    <h5><strong>Hvide Sande</strong></h5>

                                    <p class="static-height">Minim elit et pariatur aliqua veniam qui fugiat duis ad nostrud occaecat et minim. Do
                                        culpa aliqua do sit mollit ea. Enim laboris laborum qui exercitation irure pariatur
                                        non eiusmod.</p>
                                    <a class="subpage_btn btn_top_offset" href="#">Tryk for at se Mere</a>
                                </div>
                            </div>
                        </div>