<html>
<head>
<style>
*{
padding:0;
margin:0;
}
div.dropdown-submenu{
position:relative;
width:200px;
}
div.dropdown-submenu ul{
list-style: none;
background-color:deepskyblue;
font-size:20px;
}
div.dropdown-submenu li{
position:relative;
border:2px solid black;
}
div.dropdown-submenu a{
display:block;
text-decoration:none;
padding:10px;
color:black;
}
div.dropdown-submenu li:hover > a{
background:black;
color:deepskyblue;
}
div.dropdown-submenu ul ul{
position:absolute;
top:0;
width:100%;
visibility:hidden;
}
div.dropdown-submenu li:hover > ul{
left:100%;
visibility:visible;
}
</style>
</head>
<body>
<h2>Example for CSS Vertical drop-down with sub menu</h2><br>
<div class="dropdown-submenu">
<ul>
<li><a href="">Home</a></li>
<li>
<a href="#">Services ►</a>
<ul>
<li>
<a href="#">Logo Design ►</a>
<ul>
<li><a href="#">WordMarks</a></li>
<li><a href="#">Pictorial Marks</a></li>
<li><a href="#">Monograms Logos</a></li>
<li><a href="#">Abstract Logos</a></li>
</ul>
</li>
<li>
<a href="#">Digital Marketing ►</a>
<ul>
<li><a href="#">Social Media</a></li>
<li><a href="#">SEO</a></li>
<li><a href="#">Content</a></li>
<li><a href="#">Email</a></li>
</ul>
</li>
<li><a href="#">Web Development</a></li>
</ul>
</li>
<li><a href="">Blog</a></li>
<li><a href="">About Us</a></li>
</ul>
</div>
</body>
</html>