代码如下：
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>纯CSS3圆形主菜单展开特效 - 何问起</title><base target="_blank" />
<link href="http://hovertree.com/texiao/css3/44/css/bootstrap.min.css" rel="stylesheet">
<link href="http://hovertree.com/texiao/css3/44/css/font-awesome.min.css" rel="stylesheet">
<link rel="stylesheet" type="text/css" href="http://hovertree.com/texiao/css3/44/css/hewenqi.css">
<style type="text/css">
.demo{
padding: 2em 0;
transform: translate3d(0, 0, 0);
}
.navbar{
width: 150px;
height: 150px;
line-height: 150px;
border-radius: 50%;
background: #fff;
margin: 70px auto;
position: relative;
cursor: pointer;
text-align: center;
font-size: 1.75em;
font-weight: bold;
color: #99b977;
transition: 0.24s 0.2s;
}
.navbar:hover{
background: rgba(255, 255, 255, 0.75);
}
.navbar .menu{
list-style: none;
padding: 0;
margin: 0;
position: absolute;
top: -75px;
left: -75px;
border: 150px solid transparent;
cursor: default;
border-radius: 50%;
transform: scale(0);
transition: transform 1.4s 0.07s;
z-index: -1;
}
.navbar:hover .menu{
transition: transform 0.4s 0.08s, z-index 0s 0.5s;
transform: scale(1);
z-index: 1;
}
.navbar .menu li{
position: absolute;
top: -100px;
left: -100px;
transform-origin: 100px 100px;
transition: all 0.5s 0.1s;
}
.navbar:hover .menu li{
transition: all 0.6s;
}
.navbar .menu li a{
width: 45px;
height: 45px;
line-height: 45px;
border-radius: 50%;
background: #fff;
position: absolute;
font-size: 60%;
color: #99b977;
transition: 0.6s;
}
.navbar:hover .menu li:nth-child(1){
transition-delay: 0.02s;
transform: rotate(85deg);
}
.navbar:hover .menu li:nth-child(1) a{
transition-delay: 0.04s;
transform: rotate(635deg);
}
.navbar:hover .menu li:nth-child(2){
transition-delay: 0.04s;
transform: rotate(125deg);
}
.navbar:hover .menu li:nth-child(2) a{
transition-delay: 0.08s;
transform: rotate(595deg);
}
.navbar:hover .menu li:nth-child(3){
transition-delay: 0.06s;
transform: rotate(165deg);
}
.navbar:hover .menu li:nth-child(3) a{
transition-delay: 0.12s;
transform: rotate(555deg);
}
.navbar:hover .menu li:nth-child(4){
transition-delay: 0.08s;
transform: rotate(205deg);
}
.navbar:hover .menu li:nth-child(4) a{
transition-delay: 0.16s;
transform: rotate(515deg);
}
.navbar:hover .menu li:nth-child(5){
transition-delay: 0.1s;
transform: rotate(245deg);
}
.navbar:hover .menu li:nth-child(5) a{
transition-delay: 0.2s;
transform: rotate(475deg);
}
.navbar:hover .menu li:nth-child(6){
transition-delay: 0.12s;
transform: rotate(285deg);
}
.navbar:hover .menu li:nth-child(6) a{
transition-delay: 0.24s;
transform: rotate(435deg);
}
.navbar:hover .menu li:nth-child(7){
transition-delay: 0.14s;
transform: rotate(325deg);
}
.navbar:hover .menu li:nth-child(7) a{
transition-delay: 0.28s;
transform: rotate(395deg);
}
.navbar:hover .menu li:nth-child(8){
transition-delay: 0.16s;
transform: rotate(365deg);
}
.navbar:hover .menu li:nth-child(8) a{
transition-delay: 0.32s;
transform: rotate(355deg);
}
.navbar:hover .menu li:nth-child(9){
transition-delay: 0.18s;
transform: rotate(405deg);
}
.navbar:hover .menu li:nth-child(9) a{
transition-delay: 0.36s;
transform: rotate(315deg);
}
</style>
</head>
<body>
<div class="demo">
<div class="container">
<div class="row">
<div class="col-md-12">
<div class="navbar">主菜单
<ul class="menu">
<li><a href="http://hovertree.com/h/bjaf/hpv2kwl1.htm" class="fa fa-facebook"></a></li>
<li><a href="http://hovertree.com/h/bjag/mej790la.htm" class="fa fa-google-plus"></a></li>
<li><a href="http://hovertree.com/h/bjaf/28bhvmmu.htm" class="fa fa-twitter"></a></li>
<li><a href="http://hovertree.com/h/bjag/ajaxmvc.htm" class="fa fa-linkedin"></a></li>
<li><a href="http://hovertree.com/h/bjag/o46xlsnm.htm" class="fa fa-pinterest"></a></li>
<li><a href="http://hovertree.com/h/bjag/toiq32dh.htm" class="fa fa-rss"></a></li>
<li><a href="http://hovertree.com/h/bjaf/aqm3qaed.htm" class="fa fa-instagram"></a></li>
<li><a href="http://hovertree.com/h/bjaf/c2c0k0tf.htm" class="fa fa-skype"></a></li>
<li><a href="http://hovertree.com/h/bjaf/ati6k7yk.htm" class="fa fa-github"></a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
<div style="text-align:center;margin:50px 0; font:normal 14px/24px 'MicroSoft YaHei';">
<p>适用浏览器：支持CSS3的浏览器</p>
<p>来源：<a href="http://hovertree.com/" target="_blank">何问起</a></p>
</div>
</body>
</html>特效推荐：
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