��页</div>
            <div><span class="key">F</span> 全屏切换</div>
            <div><span class="key">T</span> 缩略图</div>
            <div><span class="key">H</span> 显示/隐藏帮助</div>
            <div><span class="key">C</span> 缓存状态</div>
            <div><span class="key">ESC</span> 退出演示</div>
        </div>

        <!-- 缓存状态面板 -->
        <div class="cache-status" id="cacheStatus">
            <h6><i class="fas fa-memory"></i> 缓存状态</h6>
           