后面的样式会覆盖前面相同的样式
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style type="text/css">
.box {
color: red;
font-size: 40px;
}
.box1 {
color: green;
}
</style>
</head>
<body>
<div class="box box1">
层叠样式
</div>
</body>
</html>