今天要分享的这款菜单是基于CSS3的下拉菜单，功能非常强大，下拉菜单中不仅拥有背景色渐变的菜单项，而且还带有分享按钮的菜单项，为了让菜单更加美观，每一个菜单项都带有非常漂亮的小图标，而且在下拉菜单中还有鼠标滑过缩进的动画特效，具体可以点击DEMO查看。

接下来我们来具体解说一下实现这款CSS3下拉菜单原理和过程，代码主要是HTML和CSS。

首先是HTML代码，主要是两部分，左侧的下拉菜单项和右侧的分享按钮菜单，分别用了一个ul li列表：

<ul class=”menu-function”>
<li>
<a href=”" title=”">CATEGORIES</a>
<ul class=”dropdown-menu categories”>
<li><a href=”" title=”">Design</a></li>
<li><a href=”" title=”">Freebies</a></li>
<li><a href=”" title=”">Tutorials</a></li>
<li><a href=”" title=”">Coding</a></li>
<li><a href=”" title=”">Inspiration</a></li>
<li><a href=”" title=”">WordPress</a></li>
<li><a href=”" title=”">Resources</a></li>
</ul>
</li>
<li><a href=”" title=”">SHOP</a></li>
<li id=”search”>
<a href=”#search” title=”">SEARCH</a>
</li>
<li id=”search-hidden”>
<input type=”text” name=”" id=”"><a href=”#search-hidden” title=”"></a>
</li>
</ul>
<ul class=”menu-share”>
<li>
<a href=”" title=”">FOLLOW US</a>
<ul class=”dropdown-menu follow”>
<li><a href=”" title=”">RSS</a></li>
<li><a href=”" title=”">Twitter</a></li>
<li><a href=”" title=”">Facebook</a></li>
<li><a href=”" title=”">Google+</a></li>
<li><a href=”" title=”">Dribbble</a></li>
</ul>
</li>
<li>
<a href=”" title=”">SHARE</a>
<ul class=”dropdown-menu share”>
<li><a href=”" title=”">Facebook</a></li>
<li><a href=”" title=”">Twitter</a></li>
<li><a href=”" title=”">Google+</a></li>
</ul>
</li>
</ul>

这个ul结构支撑了下拉菜单的基本骨架，应该还算普通。

接下来是CSS3代码，是实现这款CSS3下拉菜单的关键：

.page-menu-wrapper > ul > li {
position: relative;
float: left;
border-left: 1px solid #3d61a2;
border-right: 1px solid #3d61a2;
margin-right: -1px;
}
.menu-function {
float: left;
}
.menu-share {
float: right;
}
.page-menu-wrapper > .menu-function > li:first-child {
border-left: none;
}
.page-menu-wrapper > .menu-share > li:last-child {
border-right: none;
}
.page-menu-wrapper a {
position: relative;
display: block;
padding: 0 15px;
transition: all .3s ease-out;
}
.page-menu-wrapper > ul > li:hover > a {
color: #3d61a2;
background-color: #fff;
}
.page-menu-wrapper > ul > li:hover .dropdown-menu {
display: block;
}
.dropdown-menu {
display: none;
position: absolute;
width: 260px;
font-size: 18px;
font-weight: bold;
text-align: left;
background-color: #fff;
}
.dropdown-menu.categories a {
color: #000;
}
.dropdown-menu.categories a:hover {
color: #5bc4be;
margin-left: 10px;
}
#search:target a[href="#search"] {
display: none;
}
#search:target ~ #search-hidden {
display: block;
}
#search-hidden {
display: none;
padding: 0 5px;
background-color: #fff;
}
#search-hidden input {
border: none;
line-height: 24px;
width: 180px;
}
#search-hidden a {
float: right;
padding: 0;
width: 20px;
height: 45px;
}
#search-hidden a:before {
content: “\7d”;
left: 0;
color: #446cb3;
}
.menu-function > li > a,.menu-share > li > a {
padding-left: 40px;
}
.page-menu-wrapper a:before {
position: absolute;
left: 15px;
font-family: ‘icomoon’;
font-style: normal;
speak: none;
font-weight: normal;
font-smoothing: antialiased;
font-size: 18px;
vertical-align: middle;
}
.menu-function > li:nth-child(1) > a:before {
content: “\e048″;
}
.menu-function > li:nth-child(2) > a:before {
content: “\3b”;
}
.menu-function > li:nth-child(3) > a:before {
content: “\7d”;
}
.menu-share > li:nth-child(1) > a:before {
content: “\e0a2″;
}
.menu-share > li:nth-child(2) > a:before {
content: “\e05b”;
}
/*follow*/
.dropdown-menu.follow {
width: 223px;
}
.dropdown-menu.follow a {
padding-left: 35px;
font-size: 14px;
}
.dropdown-menu.follow a:before {
left: 10px;
}
.dropdown-menu.follow li:nth-child(1) a:before {
content: “\e0a5″;
}
.dropdown-menu.follow li:nth-child(2) a:before {
content: “\e0a2″;
}
.dropdown-menu.follow li:nth-child(3) a:before {
content: “\e04c”;
}
.dropdown-menu.follow li:nth-child(4) a:before {
content: “\e022″;
}
.dropdown-menu.follow li:nth-child(5) a:before {
content: “\e03d”;
}
.dropdown-menu.follow li:nth-child(1) a {
color: #ffaa31;
}
.dropdown-menu.follow li:nth-child(2) a {
color: #07beed;
}
.dropdown-menu.follow li:nth-child(3) a {
color: #314d91;
}
.dropdown-menu.follow li:nth-child(4) a {
color: #2d2d2d;
}
.dropdown-menu.follow li:nth-child(5) a {
color: #e84788;
}
.dropdown-menu.follow li:nth-child(1):hover {
background-color: #ffaa31;
}
.dropdown-menu.follow li:nth-child(2):hover {
background-color: #07beed;
}
.dropdown-menu.follow li:nth-child(3):hover {
background-color: #314d91;
}
.dropdown-menu.follow li:nth-child(4):hover {
background-color: #2d2d2d;
}
.dropdown-menu.follow li:nth-child(5):hover {
background-color: #e84788;
}
.dropdown-menu.follow li:hover a {
color: #fff;
margin-left: 10px;
}
.dropdown-menu.share {
width: 120px;
right:0;
}
.dropdown-menu.share a {
margin: 10px;
line-height: 26px;
font-size: 12px;
padding-left: 20px;
border: 1px solid #cbcbcb;
border-radius: 2px;
color: #4c4c4c;
background-color: #efefef;
}
.dropdown-menu.share a:hover {
background-color: #fff;
}
.dropdown-menu.share li a:before {
font-size: 12px;
left: 5px;
}
.dropdown-menu.share li:nth-child(1) a:before {
content: “\e04c”;
color: #314d91;
}
.dropdown-menu.share li:nth-child(2) a:before {
content: “\e0a2″;
color: #07beed;
}
.dropdown-menu.share li:nth-child(3) a:before {
content: “\e022″;
color: #2d2d2d;
}
@font-face {
font-family: ‘icomoon’;
src:url(‘fonts/icomoon.eot’);
src:url(‘fonts/icomoon.eot?#iefix’) format(‘embedded-opentype’),
url(‘fonts/icomoon.svg#icomoon’) format(‘svg’),
url(‘fonts/icomoon.woff’) format(‘woff’),
url(‘fonts/icomoon.ttf’) format(‘truetype’);
font-weight: normal;
font-style: normal;
}

代码比较复杂，建议下载源代码研究。

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