Bootstrap使元素看起来像标题

<!DOCTYPE html>
<html>
   <head>
      <title>Bootstrap Example</title>
      <link href = /bootstrap/css/bootstrap.min.css rel = stylesheet>
      <script src = /scripts/jquery.min.js></script>
      <script src = /bootstrap/js/bootstrap.min.js></script>
   </head>
   <body>
      <div class = container>
         <h1>Planet</h1>
         <h2>Earth</h2>
         <h3>Asia</h3>
         <h4>India</h4>
         <h5>Hyderabad</h5>
         <h6>Madhapur</h6>
      </div>
   </body>
</html>

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