halo-theme-hao/templates/modules/widgets/aside/toc.html

<!-- 目录 -->
<div class="card-widget" id="card-toc">
    <div class="item-headline">
        <i class="haofont hao-icon-bars"></i>
        <span>文章目录</span>
        <span class="toc-percentage"></span>
    </div>
    <!-- 目录容器 -->
    <div class="toc-content"></div>
</div>