a-{{ 'exclamation-triangle' if category == 'error' else 'info-circle' }} me-2"></i>
                        {{ message }}
                        <button type="button" class="btn-close" data-bs-dismiss="alert"></button>
                    </div>
                {% endfor %}
            {% endif %}
        {% endwith %}

        {% block content %}{% endblock %}
    </main>

    <!-- 页脚 -->
    <footer class="bg-light mt-5 py-4">
        <div class="container text-center">
            <p class="text-mut