代碼
<link rel="stylesheet" href="css/style.css">
<title>微信導(dǎo)航欄</title>
</head>
<body>
<div class="nav">
<ul>
<li><a href="#">
<span>首頁</span>
</a></li>
<li><a href="#">
<span>幫助與反饋</span>
</a></li>
<li><a href="#">
<span>公眾平臺(tái)</span>
</a></li>
<li><a href="#">
<span>開放平臺(tái)</span>
</a></li>
<li><a href="#">
<span>微信支付</span>
</a></li>
<li><a href="#">
<span>微信廣告</span>
</a></li>
<li><a href="#">
<span>表情開放平臺(tái)</span>
</a></li>
<li><a href="#">
<span>微信網(wǎng)頁版</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;
}
結(jié)果
image.png
代碼
<link rel="stylesheet" href="css/style.css">
<title>偽元素選擇器</title>
</head>
<body>
<div>是</div>
div::before {
content: "楚喬";
background-color: pink;
border:1px solid red;
width: 100px;
height: 100px;
display: block;
/*類選擇惕稻，偽類選擇器都是選區(qū)對(duì)象*/
/*偽元素選擇器本質(zhì)是插入一個(gè)元素（標(biāo)簽 盒子） 只不過是行內(nèi)元素span a*/
}
div::after {
content: "宇文玥的";
display: block;
width: 50px;
height: 50px;
border: 1px solid skyblue;
}
結(jié)果
image.png
代碼
<link rel="stylesheet" href="css/style.css">
<title>鼠標(biāo)經(jīng)過顯示邊框</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;/*子絕父相*/
}
div:hover::before {/*鼠標(biāo)經(jīng)過之后，前面加個(gè)為偽元素*/
content: "";
width: 100%;
height: 100%;
border: 10px solid rgba(255, 255, 255, .4);
display: block;/*偽元素屬于行內(nèi)元素*/
position: absolute;/*要偽元素不占位拘央，就用絕對(duì)定位*/
top: 0;
left: 0;
box-sizing:border-box;/*把padding和border都算入width里面*/
}
結(jié)果
image.png
代碼
<link rel="stylesheet" href="css/style.css">
<title>過渡</title>
</head>
<body>
<div>小米</div>
div {
width: 200px;
height: 100px;
background-color: pink;
color: green;
/* transition:要過度的屬性 花費(fèi)時(shí)間 運(yùn)動(dòng)曲線 何時(shí)開始*/
/* transition: width 3s ease-in 3s, height 0.3s ease-in 1s;*/
/* transition 過度的意思养渴，這句話寫到div里面而不是hover里面*/
/* transition: all 0.6s; 所有屬性都變化用all 就可以了 后面兩個(gè)屬性可以省略*/
transition:all 5s;
}
div:hover {
background-color: green;
color: pink;
}
結(jié)果
image.png
