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老师批语：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>0323作业：CSS四种居中对齐方式</title>
<style type="text/css">
body {
background-image: url(http://www.mi-888.com/php/zuoye/20180323/bg.jpg);
background-repeat: no-repeat;/*背景图不重复*/
background-attachment: fixed;/*背景图像固定*/
background-size:cover;/*背景图铺满全屏*/
}
.box1 {
background-color: pink;
width:200px;
height:200px;
line-height:200px;
text-align: center;
margin-bottom: 10px;
}
.box2 {
background-color: lightblue;
width:200px;
height:200px;
text-align: center;/*水平居中*/
display: table-cell;/*将当前块显示方式改为表格单元格方式*/
vertical-align: middle;/*设置单元格内元素垂直居中*/
}
.box3 {
background-color: orange;
width:200px;
height:200px;
text-align: center;
display: table-cell;
vertical-align: middle;
}
.box3-1 {
background-color:yellow;
width: 100px;
height: 100px;
margin: auto;/*浏览器自动计算*/
line-height: 100px;
text-align: center;
}
.box4 {
background-color:lightgreen;
width: 200px;
height:200px;
text-align: center;
display: table-cell;
vertical-align: bottom;
}
.box4 ul {
padding: 0;
}
.box4 li {
list-style: none;
display: inline;
}
</style>
</head>
<body>
一、单行文本
<div class="box1">
<a href="">PHP中文网</a>
</div>
<hr>
二、多行文本
<div class="box2">
<a href="">PHP中文网</a><br>
<span>www.php.cn</span>
</div>
<hr>
三、嵌套DIV
<div class="box3">
<div class="box3-1">
<a href="">PHP中文网</a>
</div>
</div>
<hr>
四、底部分页导航
<div class="box4">
<ul>
<li><a href="">首页</a></li>
<li><a href="">2</a></li>
<li><a href="">3</a></li>
<li><a href="">4</a></li>
<li><a href="">尾页</a></li>
</ul>
</div>
<hr>
</body>
</html>点击 "运行实例" 按钮查看在线实例
手抄代码：
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