css3折叠下拉菜单特效代码

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以下是 css3折叠下拉菜单特效代码的示例演示效果:

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部分效果截图:

HTML代码(index.html):

<!DOCTYPE HTML>
<html lang="en-US">
<head>
	<meta charset="UTF-8">
	<title>css3折叠下拉菜单</title>
	<link rel="stylesheet" type="text/css" href="css/base.css" media="all" />
	<style>
body {
	background-color: #f2f2f2;
}		
.box {
	margin-top: 40px;
	height: 85px;
	border-bottom: 5px solid #fff;
	background-color: #0dc2e3;
	background-image: -webkit-linear-gradient(180deg, transparent 55%, #00bfe1 45%);
	background-image: -o-linear-gradient(180deg, transparent 50%, #00bfe1 50%);
	background-image: -ms-linear-gradient(180deg, transparent 50%, #00bfe1 50%);
	background-image: linear-gradient(90deg, transparent 50%, #00bfe1 50%);
	background-size: 30px 30px;
}
.menu {
	width:950px;
	margin: 0 auto;
	-webkit-perspective: 50px;
	-moz-perspective: 50px;
	-ms-perspective: 50px;
	perspective: 50px;
	
}
.menu > li {
    list-style:none;
	display: inline-block;
	padding-top: 48px;
	-webkit-transform-style: preserve-3d;
	-moz-transform-style: preserve-3d;
	-ms-transform-style: preserve-3d;
	transform-style: preserve-3d;
}
.menu > li > a {
	position: relative;
	display: block;
	line-height: 36px;
	color: #fff;
	font-weight: bold;
	font-size: 20px;
	padding: 0 20px;
}
.menu > li:first-child > a:before {
	position: absolute;
	left: 0;
	top: 36px;
	content: '';
	width: 1px;
	height: 1px;
	border-width: 15px 30px;
	border-style: solid;
	border-color: transparent;
	border-top-color: #4bb100;
}
.menu > li:first-child > a:after {
	font-family: 'iconminia';
	font-style: normal;
	speak: none;
	font-weight: normal;
	-webkit-font-smoothing: antialiased;
	font-size: 22px;
	content: "\21";
}
.menu > li:first-child a,
	.menu > li:first-child:hover > a,
	.menu > li:first-child:hover a:hover {
	color: #fff;
	top: 2px;
	height: 36px;
	margin-right: 10px;
	text-shadow: 0 1px 0 #3c8f00;
	border-radius: 5px 5px 0 0;
	box-shadow: 0 1px 0 #a6d980 inset;	
	background-color: #4bb100;
}
.menu > li:hover > a {
	color: #1a89c8;
	text-decoration: none;
	border-radius: 5px 5px 0 0;
	background-color: #fff;
} 
.menu ul {
	position: absolute;
	text-align: left;
	line-height: 40px;
	font-size: 14px;
	width: 200px;
	background-color: #fff;
	-webkit-transition: all 0.3s ease-in;
	-moz-transition: all 0.3s ease-in;
	-ms-transition: all 0.3s ease-in;
	transition: all 0.3s ease-in;
	-webkit-transform-origin: 0px 0px;
 	-moz-transform-origin: 0px 0px;
 	transform-origin: 0px 0px;
 	-webkit-transform: rotateX(-90deg);
 	-moz-transform: rotateX(-80deg);
	transform: rotateX(-90deg);
	-moz-backface-visibility: hidden;
	-webkit-backface-visibility: hidden;
	backface-visibility: hidden;
}
.menu ul a {
	display: block;
	padding: 0 15px 0 10px;
	color: #1a89c8;
}
.menu > li:hover ul {
	display: block;
	-webkit-transform: rotateX(0deg);
	-moz-transform: rotateX(0deg);
	-ms-transform: rotateX(0deg);
	transform: rotateX(0deg);
}
.menu ul a:hover {
	color: #fff;
	text-shadow: 0 1px 0 #1c71a1;
	text-decoration: none;
	background-color: #218bc7;
} 
@font-face {
	font-family: 'iconminia';
	src:url('fonts/iconminia.eot');
	src:url('fonts/iconminia.eot?#iefix') format('embedded-opentype'),
		url('fonts/iconminia.svg#iconminia') format('svg'),
		url('fonts/iconminia.woff') format('woff'),
		url('fonts/iconminia.ttf') format('truetype');
	font-weight: normal;
	font-style: normal;
}
	</style>
</head>
<body>
<div class="page">
	<section class="demo">
		<div class="box">
			<ul class="menu">
				<li><a href="#"></a></li>
				<li><a href="#">About Me</a>
					<ul>
						<li><a href="#">Lorem ipsum dolor</a></li>
						<li><a href="#">Maecenas lacinia sem</a></li>
						<li><a href="#">Suspendisse fringilla</a></li>
					</ul>
				</li>
				<li><a href="#">Portfolio</a>
					<ul>
						<li><a href="#">Lorem ipsum dolor</a></li>
						<li><a href="#">Maecenas dignissim ..</a></li>
						<li><a href="#">Suspendisse fringilla</a></li>
						<li><a href="#">Lorem ipsum dolor</a></li>
						<li><a href="#">Maecenas lacinia sem</a></li>
						<li><a href="#">Suspendisse fringilla</a></li>
					</ul>
				</li>
				<li><a href="#">Clients</a>
					<ul>
						<li><a href="#">Lorem ipsum dolor</a></li>
						<li><a href="#">Maecenas lacinia sem</a></li>
						<li><a href="#">Suspendisse fringilla</a></li>
					</ul>
				</li>
				<li><a href="#">Contact Me</a>
					<ul>
						<li><a href="#">Lorem ipsum dolor</a></li>
						<li><a href="#">Maecenas dignissim ..</a></li>
						<li><a href="#">Suspendisse fringilla</a></li>
					</ul>
				</li>
				<li><a href="#">Support</a></li>
			</ul>
		</div>
	</section><!-- /demo -->
</div>
</body>
</html>

CSS代码(base.css):

@charset "utf-8";@import url("http://www.w3cplus.com/download/reset.css");/* ------------------------------------------------- * common * -------------------------------------------------*/
.page{text-align:left;padding-top:40px;}
.wrap_top_nav{background-color:#333;box-shadow:0 1px 3px rgba(0,0,0,0.25),0 -1px 0 rgba(0,0,0,0.1) inset;height:40px;}
#top_nav{width:1000px;margin:0 auto;position:relative;}
#top_nav a{font-size:16px;line-height:40px;float:left;margin-right:20px;color:#999;text-decoration:none;}
#top_nav a:hover{color:#fff;}
#top_nav li:nth-child(1) a{background-image:url(http://www.w3cplus.com/sites/all/themes/marvin/logo.png);background-position:0 -12px;background-repeat:no-repeat;background-size:68px 60px;padding-left:74px;color:#fff;width:74px;overflow:hidden;}
#read{position:absolute;right:0;top:0;font-family:'����';}
#header{text-align:center;}
#header .white{color:#fff;}
#header .blank{color:#444;}
#header h1{font-size:24px;}
#header h2{font-weight:normal;}
#ad_w3cplus{width:750px;margin:100px auto;text-align:center;}
#ad_w3cplus .grid-ad{float:left;}

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