体验效果：
http://hovertree.com/texiao/css3/44/
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>