   <!DOCTYPE html>
   <html lang="zh">
   <head>
       <meta charset="UTF-8">
       <title>{% block title %}{% endblock %}-IWB</title>
       <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}">
       <link rel="stylesheet" href="{{ url_for('static', filename='bootstrap/bootstrap.css') }}"></link>
       {% block head %}{% endblock %}
   </head>
   <body>
       <div class="container">
           {% block content %}{% endblock %}
       </div>
       <script src="{{ url_for('static', filename='jquery.js') }}"></script>
       <script src="{{ url_for('static', filename='bootstrap/bootstrap.js') }}"></script>
       <script src="{{ url_for('static', filename='utils.js') }}"></script>
       {% block scripts %}{% endblock %}
   </body>
   </html>
