html5 css3样式图标制作方法：
1、html代码：
<div id="boxes">
<div id="boxShortcode">border-radius: 40px (shortcode)</div>
<div id="box1">border-top-right-radius: 40px (same on both axis)</div>
<div id="box2">border-top-right-radius: 20px 40px (x <y) </div>
<div id="box3">border-top-right-radius: 40px 20px (x >y) </div>
</div>
2、css样式代码：
#boxes div { margin-bottom: 20pxheight: 50pxpadding-left: 20px }
#boxShortcode {
background: cyan
border-radius: 40px
}
#box1 {
background: red
border-top-right-radius: 40px
}
#box2 {
background: yellow
border-top-right-radius: 20px 40px
}
#box3 {
background: lime
border-top-right-radius: 40px 20px
}
3、运行结果：
HTML5使用link引入外部css<head>
<link rel="stylesheet" type="text/css" href="style.css" />
</head>
style.css/外部css文件名
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/htmlcharset=utf-8" />
<title>无标题文档</title>
<link rel="stylesheet" type="text/css" href="???.css"/>
<!--此为外部链接 css样式作为单独文件存在-->
<style type="text/css">
<!--
-->
</style>
<!--这是直接写在html文件里的css样式-->
</head>
<body>
</body>
</html>
