这是使用CSS3制作的一个圆形按钮。效果看起来很简单，其实制作也非常的简单的，主要就是径向渐变的运用，以及@font-face实现的ICON效果，当然其中也离开不其他属性的点缀效果，比如说box-shadow制作的阴影，transition制作的动画效果等。

代码中所需要的fonts我已经以附件的形式上传了，下载下来，fonts目录和代码页面 平级，这样就没有问题了。不要放错位置哦

<!DOCTYPE HTML>

<html lang="en-US">
<head>
    <meta charset="UTF-8">
    <title>精美的圆形按钮效果</title>
<style>
body {
    margin-top:100px;
    padding-left:100px;
   
}
.demo {
    width: 400px;
    text-align: center;
    margin:80px auto 0;
}
.button {
    cursor:pointer;
    position: relative;
    font-size: 0;
    width: 100px;
    height: 100px;
    text-align: center;
    margin-right: 50px;
    border-radius: 50%;
    border:none;
    box-shadow: 0 2px 5px rgba(0,0,0,.4);
    background: -webkit-linear-gradient(top,#fff,#d5dbe1);
    background: -moz-linear-gradient(top,#fff,#d5dbe1);
    background: -ms-linear-gradient(top,#fff,#d5dbe1);
    background: -o-linear-gradient(top,#fff,#d5dbe1);
    linear-gradient(top,#fff,#d5dbe1);
    -webkit-transition: all .13s ease-out;
       -moz-transition: all .13s ease-out;
         -o-transition: all .13s ease-out;
            transition: all .13s ease-out;
}
.button:after {
    display: inline-block;
    font-family: 'icomoon';
    font-size: 24px;
    color: #bdc0c1;
    content: attr(data-icon);
    speak: none;
    font-weight: normal;
    -webkit-font-smoothing: antialiased;
    width: 64px;
    line-height: 64px;
    margin: 10px;
    border-radius: 32px;
    border: 1px solid #efefef;
    box-shadow: -1px 0 0 #dbdcdd,1px 0 0 #dbdcdd,0 1px 0 #d0d1d2,0 0 8px #fff;
    background: -webkit-linear-gradient(top left,#fcfcfc 50%,#dfe4e8);
}
.button:first-child:after {
    content: "\21";
}
.button:last-child:after {
    content: "\25";
}
.button:hover:after {
    color: #19a6e4;
    box-shadow: 0 1px 3px #d7d8d9 inset;
    background: -webkit-radial-gradient(#dbeef8 ,#f2f4f6 50%);
}
.button:active {
    top: 3px;
    box-shadow: 0 1px 3px #d7d8d9 inset;
}
@font-face {
    font-family: 'icomoon';
    url('fonts /icomoon.eot');
    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;
}
</style>
</head>
<body>
<div class="page">
<div class="buttons">
    <button type="button" class="button">twitter</button>
    <button type="button" class="button">github</button>
</div>
    </section>
    <section id="ad_w3cplus">
        <div class="grid-ad">
        <script type="text/javascript">
/*250*250，*/
var cpro_id = "u1089145";
</script>
<script src="http://cpro.baidustatic.com/cpro/ui/c.js" type="text/javascript"></script>
        </div>
        <div class="grid-ad">
        <script type="text/javascript">
/*250*250，*/
var cpro_id = "u1089141";
</script>
<script src="http://cpro.baidustatic.com/cpro/ui/c.js" type="text/javascript"></script>
        </div>
        <div class="grid-ad">
        <script type="text/javascript">
/*250*250，*/
var cpro_id = "u1086065";
</script>
<script src="http://cpro.baidustatic.com/cpro/ui/c.js" type="text/javascript"></script>
        </div>
        <p><script type="text/javascript">
var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://");
document.write(unescape("%3Cscript src='" + _bdhmProtocol + "hm.baidu.com/h.js%3F177319b798978621f83845b12c86fa29' type='text/javascript'%3E%3C/script%3E"));
</script>
</p>
    </section>
</div>
</body>
</html>