          <iframe srcdoc="{{ slide.html_content | e }}" title="Slide {{ loop.index }}"></iframe>
                <div class="thumbnail-number">{{ loop.index }}</div>
            </div>
            {% endfor %}
        </div>

        <!-- 键盘快捷键提示 -->
        <div class="keyboard-hints" id="keyboardHints">
            <h6><i class="fas fa-keyboard"></i> 快捷键</h6>
            <div><span class="key">←/→</span> 上一页/下一页</div>
            <div><span class="key">Space</span> 下�