代码
<link rel="stylesheet" href="css/style.css">
<title>微信导航栏</title>
</head>
<body>
<div class="nav">
<ul>
<li><a href="#">
<span>首页</span>
</a></li>
<li><a href="#">
<span>帮助与反馈</span>
</a></li>
<li><a href="#">
<span>公众平台</span>
</a></li>
<li><a href="#">
<span>开放平台</span>
</a></li>
<li><a href="#">
<span>微信支付</span>
</a></li>
<li><a href="#">
<span>微信广告</span>
</a></li>
<li><a href="#">
<span>表情开放平台</span>
</a></li>
<li><a href="#">
<span>微信网页版</span>
</a></li>
</ul>
</div>
* {
margin: 0;
padding: 0;
}
ul {
list-style: none;
}
body {
background: url(../images/3S9sFMD.jpg) repeat-x;
}
.nav {
height: 75px;
}
.nav li {
float: left;
margin: 0 10px;
padding-top: 21px;
}
.nav li a {
display: block;
height: 33px;
background:url("../images/lTcb_ve.png") no-repeat;
color: #ffffff;
font-size: 14px;
line-height: 33px;
padding-left: 15px;
text-decoration: none;
}
/*.nav li a:hover {*/
/* background-image:url("");*/
/*}*/
.nav li a span {
display: block;
line-height: 33px;
background: url("../images/lTcb_ve.png") no-repeat right center;
padding-right: 15px;
}
结果
image.png
代码
<link rel="stylesheet" href="css/style.css">
<title>伪元素选择器</title>
</head>
<body>
<div>是</div>
div::before {
content: "楚乔";
background-color: pink;
border:1px solid red;
width: 100px;
height: 100px;
display: block;
/*类选择，伪类选择器都是选区对象*/
/*伪元素选择器本质是插入一个元素（标签 盒子） 只不过是行内元素span a*/
}
div::after {
content: "宇文玥的";
display: block;
width: 50px;
height: 50px;
border: 1px solid skyblue;
}
结果
image.png
代码
<link rel="stylesheet" href="css/style.css">
<title>鼠标经过显示边框</title>
</head>
<body>
<div><img src="images/timg.jpg" width="296" height="180" alt=""></div>
<div><img src="images/timg.jpg" width="296" height="180" alt=""></div>
<div><img src="images/timg.jpg" width="296" height="180" alt=""></div>
div {
width: 296px;
height: 180px;
margin: 20px auto;
position: relative;/*子绝父相*/
}
div:hover::before {/*鼠标经过之后，前面加个为伪元素*/
content: "";
width: 100%;
height: 100%;
border: 10px solid rgba(255, 255, 255, .4);
display: block;/*伪元素属于行内元素*/
position: absolute;/*要伪元素不占位，就用绝对定位*/
top: 0;
left: 0;
box-sizing:border-box;/*把padding和border都算入width里面*/
}
结果
image.png
代码
<link rel="stylesheet" href="css/style.css">
<title>过渡</title>
</head>
<body>
<div>小米</div>
div {
width: 200px;
height: 100px;
background-color: pink;
color: green;
/* transition:要过度的属性 花费时间 运动曲线 何时开始*/
/* transition: width 3s ease-in 3s, height 0.3s ease-in 1s;*/
/* transition 过度的意思，这句话写到div里面而不是hover里面*/
/* transition: all 0.6s; 所有属性都变化用all 就可以了 后面两个属性可以省略*/
transition:all 5s;
}
div:hover {
background-color: green;
color: pink;
}
结果
image.png
