多级下拉 W3.CSS

Question

我想知道 w3.css 是否支持多级下拉？

<div class="w3-top">
            <div class="w3-bar w3-black w3-card">    
                <a class="w3-bar-item w3-button w3-padding-large w3-hide-medium w3-hide-large w3-right" href="javascript:void(0)" onclick="toggleScreensizeNav()" title="Toggle Navigation Menu"><i class="fa fa-bars"></i></a>
                <a href="#" class="w3-bar-item"><img class="w3-center" src="/img/logo.png" alt="LOGO" height="30"></a>
                <a href="#" class="w3-bar-item w3-button w3-padding-large w3-hover-cyan">HOME</a>         
                <div class="w3-dropdown-hover w3-hide-small">
                    <button class="w3-padding-large w3-button w3-hover-cyan ">DROPDOWN<i class="fa fa-caret-down"></i></button>     
                    <div class="w3-dropdown-content w3-bar-block w3-card-2 w3-animate-opacity">
                        <a href="#" class="w3-bar-item w3-button">First Dropdown Link</a> 
                        <a href="#" class="w3-bar-item w3-button w3-hover-cyan">Second Dropdown Link</a>   
                        <a href="#" class="w3-bar-item w3-button w3-hover-cyan">This should open another Dropdown</a>
                    </div>
                </div>     
            </div>
        </div>

结果：

这就是我目前所拥有的。如果我尝试将下拉块复制并粘贴到应该打开另一个下拉列表的第三个链接中，它只会始终显示，而不仅仅是在我开始悬停链接时。我还想如果新的下拉菜单可以向右打开。

这是我尝试过的：

<div class="w3-top">
            <div class="w3-bar w3-black w3-card">    
                <a class="w3-bar-item w3-button w3-padding-large w3-hide-medium w3-hide-large w3-right" href="javascript:void(0)" onclick="toggleScreensizeNav()" title="Toggle Navigation Menu"><i class="fa fa-bars"></i></a>
                <a href="#" class="w3-bar-item"><img class="w3-center" src="/img/logo.png" alt="LOGO" height="30"></a>
                <a href="#" class="w3-bar-item w3-button w3-padding-large w3-hover-cyan">HOME</a>         
                <div class="w3-dropdown-hover w3-hide-small">
                    <button class="w3-padding-large w3-button w3-hover-cyan ">DROPDOWN<i class="fa fa-caret-down"></i></button>     
                    <div class="w3-dropdown-content w3-bar-block w3-card-2 w3-animate-opacity">
                        <a href="#" class="w3-bar-item w3-button">First Dropdown Link</a> 
                        <a href="#" class="w3-bar-item w3-button w3-hover-cyan">Second Dropdown Link</a>   
                        <div class="w3-dropdown-hover w3-hide-small">
                            <button class="w3-padding-large w3-button w3-hover-cyan ">This should open another Dropdown<i class="fa fa-caret-right"></i></button>     
                            <div class="w3-dropdown-content w3-bar-block w3-card-2 w3-animate-opacity">
                                <a href="#" class="w3-bar-item w3-button">1st Link</a> 
                                <a href="#" class="w3-bar-item w3-button w3-hover-cyan">2nd Link</a>   
                            </div>
                        </div>     
                    </div>
                </div>     
            </div>
        </div>

结果：

我现在正在使用 w3.css。到目前为止，它满足了我所需要的一切。任何想法我可以添加到 css 中，即第二个下拉列表将起作用并且在悬停第一个下拉列表时尚未显示？