<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <p>big world</p> <br><br> <h2><span>Bu bir denemedir.</span></h2> <p>this is some content other</p> </div> </div>

h2 { width: 100%; text-align: center; border-bottom: 1px solid #000; line-height: 0.1em; margin: 10px 0 20px; } h2 span { background:#fff; padding:0 10px; }