<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>优先级和权重</title>
</head>
<body>
<h1 class="title test" id="active today">hello</h1>
<div class="col-md-3 vip">Boottrap</div><style>div.col-md-3.vip{border: solid red;}div.col-md-3 {border: solid #002;}body h1.title.test#active#today{color: darkorange;}body h1.title{color: red;}body h1{color: darkblue;}h1{color: darkgreen;}/* 权重计算 *//* id数量，class数量，标签数量 */</style></body></html>
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