<html lang="en">
<head>
<meta charset="UTF-8">
<title>TEST</title>
<style>
.h100{
height: 100px;
}
.gra{background: linear-gradient(#fb3 20%, #58a 80%);}
#.gra{background: linear-gradient(#fb3 20%, #58a 30%,#ccc 50%);}
#.gra{background: linear-gradient(#fb3 50%, #58a 50%);background-size: 100% 20px;}
</style>
</head>
<body>
去掉代码中“#”可以看到变化
<div class="h100 gra"></div>
</body>
</html>