<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="row">
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card"><img class="card-img-top" src="..." alt="Card image cap" />
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block"><a class="card-link" href="#">Card link</a> <a class="card-link" href="#">Another link</a></div>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card"><img class="card-img-top" src="..." alt="Card image cap" />
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block"><a class="card-link" href="#">Card link</a> <a class="card-link" href="#">Another link</a></div>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card"><img class="card-img-top" src="..." alt="Card image cap" />
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block"><a class="card-link" href="#">Card link</a> <a class="card-link" href="#">Another link</a></div>
</div>
</div>
<!-- Add the extra clearfix for only the required viewport -->
<div class="clearfix hidden-sm-up"></div>
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card"><img class="card-img-top" src="..." alt="Card image cap" />
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block"><a class="card-link" href="#">Card link</a> <a class="card-link" href="#">Another link</a></div>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card"><img class="card-img-top" src="..." alt="Card image cap" />
<div class="card-block">
<h4 class="card-title">Card title</h4>
<p class="card-text">Some quick example text to build on the card title and make up the bulk of the card's content.</p>
</div>
<ul class="list-group list-group-flush">
<li class="list-group-item">Cras justo odio</li>
<li class="list-group-item">Dapibus ac facilisis in</li>
<li class="list-group-item">Vestibulum at eros</li>
</ul>
<div class="card-block"><a class="card-link" href="#">Card link</a> <a class="card-link" href="#">Another link</a></div>
</div>
</div>
<div class="col-xs-12 col-sm-12 col-lg-4">
<div class="card style="background-color: #333; border-color: #333;">
<div class="card-block">
<h3 class="card-title">Special title treatment</h3>
<p class="card-text">With supporting text below as a natural lead-in to additional content.</p>
<a href="#" class="btn btn-primary">Go somewhere</a>
</div>
</div>
</div>
</div>