径向渐变出现在中心。您可以尝试运行以下代码以在CSS3中实现径向渐变-
<html>
<head>
<style>
#grad1 {
height: 100px;
width: 550px;
background: -webkit-radial-gradient(red 5%, green 15%, pink 60%);
background: -o-radial-gradient(red 5%, green 15%, pink 60%);
background: -moz-radial-gradient(red 5%, green 15%, pink 60%);
background: radial-gradient(red 5%, green 15%, pink 60%);
}
</style>
</head>
<body>
<div id = "grad1"></div>
</body>
</html>