<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<style type="text/css">
button{
background-color: rgb(20, 143, 224);
border: none;
color: white;
padding: 9px 25px;
text-align: center;
text-decoration: none;
display: inline-block;
font-size: 12px;
border-radius: 20px;
margin: 10px 5px 30px 10px;
cursor: pointer;
background-image: linear-gradient(to bottom,rgba(0,0,0,0) 0%,rgba(0,0,0,0.3) 100%);
box-shadow: inset 0 0.3rem 0.2rem rgba(255,255,255,.2), inset 0 -0.3rem 0.2rem rgba(0,0,0,.2), 0 0.2rem 0.4rem rgba(0,0,0,.2);
text-shadow: 0 0.05rem rgba(0,0,0,.8), 0 0.3rem 0.4rem rgba(0,0,0,.2), 0 -0.2rem 0.4rem rgba(255,255,255,.2);
}
</style>
</head>
<body>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
<button type="button">按钮1</button>
</body>
</html>
原文：https://www.cnblogs.com/bearSky/p/14218298.html