在向下滚动内容时如何固定导航菜单（辅助菜单）？

Question

我在页面上有一个主菜单，然后在标题部分下有另一个菜单，用于对页面的不同部分进行分类。我想将此辅助菜单固定在适当的位置，以便在我滚动时它保持在适当的位置（页面顶部。问题是我的主菜单也已经固定在页面顶部，所以我没有确定是否可行。

我尝试将其固定到位，但是文本会滚动浏览，如果我将其固定到页面顶部，它将消失。

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我希望菜单固定在主菜单下方。有可能吗？