<!DOCTYPE html>
<html>
<head>
    <title> {% block title %}繼承demo page{% endblock %} </title>
</head>
    <body>

        {% block context_main %}
            <div><font color="#FF0000">這是主體內容（繼承demo示範用）</font></div>
        {% endblock %}

    </body>
</html>
