1. 实例演示伪类选择器: 结构伪类与状态伪类
a、图片演示效果
b、伪类选择器html代码
<!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>伪类CSS-状态伪类</title>
<link rel="stylesheet" href="wcss.css">
</head>
<body>
<ul class="list">
<li class="num">tou0</li>
<li>tou1</li>
<li>tou2</li>
<li>tou3</li>
<li>tou4</li>
<li>tou5</li>
<li>tou6</li>
<li>tou7</li>
</ul>
<form action="">
<fieldset>
<legend>用户注册:</legend>
<label for="name">用户名:</label>
<input type="text" id="name">
<br>
<label for="gend">性别:
<input type="radio" value="男" checked>男
<input type="radio" alue="女">女
</label>
<!---提示-->
<br>
<label for="tips">警告</label> <br>
<input type="text" id="uname" value="一旦注册禁止修改!" style="border:none">
<hr>
<legend>用户注册:</legend>
<label for="name">用户名:<input type="text"></label>
<br><br>
<button>提交</button>
</fieldset>
</form>
<style>
button{
height:30px;
width:100px;
border:none;
background: rgb(110, 110, 180);
}
button:hover {background: rgb(189, 81, 81);
cursor: pointer;
}
input:focus{background: #fae;}
</style>
</body>
</html>
c、CSS代码
/*
.list > li.num{color:blanchedalmond}
.list > li:nth-of-type(3){background: rgb(167, 101, 101);}
.list > li:nth-of-type(7){background: rgb(32, 180, 52);}
.list > li:nth-of-type(5){background: rgb(89, 16, 148);}
/*
an+b
n,b参数从0开始递增
若不+b,则n从0开始递增
**/
.list > li:nth-of-type(1n+3){background: rgb(89, 16, 148);}
.list > li:nth-of-type(-n+3){background: rgb(8, 127, 156);}
.list > li:nth-of-type(n){background: rgb(153, 134, 134);}
.list > li:nth-of-type(2n){background: rgb(153, 134, 134);}
.list > li:nth-of-type(2n+1){background: rgb(153, 134, 134);}
.list > li:nth-last-of-type(-n+1){background: rgb(70, 6, 6);}
.list > li:first-of-type{background: rgb(163, 85, 85);}
.list > li:last-of-type{background: rgb(243, 13, 13);}
2. 实例演示盒模型常用属性
a、图片显示效果
b、盒模型html代码演示
<!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>盒子模型</title>
</head>
<body>
<div class=box>box</div>
<style>
.box{
width:200px;
height: 100px;
background: rgb(146, 77, 77);
border: 5px dashed #666;
padding: 10px 10px;
margin:20px;
text-align: center;
line-height: 100px;
font-size: 22px;
color: red;
box-sizing: border-box;
}
</style>
</body>
</html>