<!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>Document</title>
<style>
body{
font-size: 30px;
}
// 伪类选择器
ul li:nth-child(2n) {
color: blueviolet;
}
// (:)伪类+(::)伪元素选择器
ul li:nth-child(2n)::before {
content: "";
width: 300px;
height: 140px;
display: inline-block;
background-image: url(./跑车.png);
background-size: cover;
z-index: 100;
margin-right: 20px;
}
ul li:nth-child(2n-1) {
color: green;
}
ul li:nth-child(2n-1)::after {
content: '9';
color: red;
}
// 属性选择器
input[type=text] {
border: 2px solid red;
}
input[type=password] {
border: 2px solid green;
}
</style>
</head>
<body>
<input type="text">
<input type="password">
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ul>
</body>
</html>
