<section class="content">
    <div class="row">
        <div class="col-xs-12">
                <div class="box box-success">
                    <h1 class="text-center">FAÇA SEU UPGRADE!</h1>
                </div>
        </div>
</div>
</section>

<script src="<?= $assets ?>plugins/jQuery/jQuery-2.1.4.min.js" type="text/javascript"></script>
<script src="<?= $assets ?>bootstrap/js/bootstrap.min.js" type="text/javascript"></script>