.code-preview .btn{margin-bottom:6px;margin-right:2px}.bg-img-index-header{background-image:url(../img/bg-index.jpg)}.bg-img-fact{background-image:url(../img/bg-fact.jpg)}.bg-img-purchase{background-image:url(../img/bg-purchase.png)}.bg-img-faq-header,.bg-img-tutorial-header{background-image:url(../img/bg-page.jpg)}