CSS3清新下滑菜單

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<style></style>
<title>CSS3下滑菜單 4</title>
<style>
body {
    background:#eee;
    margin:0;
    padding:0;
    font-family: "Trebuchet MS",Arial,Helvetica,sans-serif;
}
.example {
    position:relative;
    background:#fff url(/jscss/demoimg/201306/background.jpg);
    width:520px;
    height:382px;
    border:1px #000 solid;
    margin:20px auto;
    padding:15px;
    border-radius:3px;
    -moz-border-radius:3px;
    -webkit-border-radius:3px;
}
.nav,.nav ul {
    list-style:none;
    margin:0;
    padding:0;
}
.nav {
    position:relative;
}
.nav ul {
    height:0;
    left:0;
    overflow:hidden;
    position:absolute;
    top:46px;
}
.nav li {
    float:left;
    position:relative;
}
.nav li a {
    -moz-transition:0.5s;
    -o-transition:0.5s;
    -webkit-transition:0.5s;
    background-color:#7770B4;
    border:1px solid #6E67A6;
    color:#FFF;
    display:block;
    font-size:16px;
    line-height:35px;
    padding:5px 20px;
    text-decoration:none;
    transition:0.5s;
}
.nav li:hover > a {
    background:#8CCA33;
    border-color:#6E67A6;
    color:#fff;
}
.nav li:hover ul.subs {
    height:auto;
    width:180px;
}
.nav ul li {
    -moz-transition:0.5s;
    -o-transition:0.5s;
    -webkit-transition:0.5s;
    opacity:0;
    transition:0.5s;
    width:100%;
}
.nav li ul li {
    -moz-transition-delay:0s;
    -o-transition-delay:0s;
    -webkit-transition-delay:0s;
    transition-delay:0s;
}
.nav li:hover ul li {
    opacity:1;
    -moz-transition-delay:0.5s;
    -o-transition-delay:0.5s;
    -webkit-transition-delay:0.5s;
    transition-delay:0.5s;
}
.nav ul li a {
    background:#7770B4;
    border-color:#6E67A6;
    color:#fff;
    line-height:1px;
    -moz-transition:1.5s;
    -o-transition:1.5s;
    -webkit-transition:1.5s;
    transition:1.5s;
}
.nav li:hover ul li a {
    line-height:35px;
}
.nav ul li a:hover {
    background:#8CCA33;
    background-image: -webkit-gradient(linear, 0% 0%, 0% 95%, from(rgba(255, 255, 255, 0.5)), to(rgba(255, 255, 255, 0)));
    background-image: -moz-linear-gradient(-90deg, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0));
    background-image: -o-linear-gradient(-90deg,rgba(255,255,255,0.5),rgba(255,255,25,0));
}
</style>
</head>
<body>
<div class="example">
    <ul class="nav">
        <li><a href="/">Home</a></li>
        <li><a href="/">Tutorials</a>
            <ul class="subs">
                <li><a href="/">HTML / CSS</a></li>
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                <li><a href="/">HTML / CSS</a></li>
            </ul>
        </li>
        <li><a href="/">Resources</a>
            <ul class="subs">
                <li><a href="/">PHP</a></li>
                <li><a href="/">MySQL</a></li>
                <li><a href="/">XSLT</a></li>
                <li><a href="/">Ajax</a></li>
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            </ul>
        </li>
        <li><a href="/">About</a></li>
        <li><a href="/">Back</a></li>
    </ul>
    <div style="clear:both"></div>
</div>
</body>
</html>


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