CSS 2-9 基础布局 编程练习题

来源:2-10 编程练习

qq_诶姆_0

2017-08-10 11:57:28

http://climg.mukewang.com/598bd8fc00019bf207000703.jpg

老师,我想问一下,我自己设置的width:461.5为什么在F12里面调试的时候不管用呢?被划掉了。body的宽度是1423,所以我想左右各711.5再减去margin-left后就剩下461.5了。可不知道为什么不行。

<!doctype html>
<html>
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <style type="text/css">
        *{
            margin: 0;
            padding:0;
        }
        .head{
            width: 100%;
            height:100px;
            background: black;
        }
        .photo{
            float:left;
            height: 100px;
        }
        .words{
            
            float:right;
            color: white;
            margin-right: 50px;
        }
        .words span{
            line-height: 100px;
        }
        .foot{
            width: 100%;
            height:100px;
            background: black;
            text-align: center;
        }
        .foot span{
            line-height: 100px;
            color: white;
        }
        .body{
            width: 100%;
            height:800px;
            background-color: #4169e1;
            margin: 0 auto;
        }
        .left{
            width: 461.5;
            height: 600px;
            background-color: yellow;
            float: left;
            padding-top: 200px;
            padding-left: 250px;
            text-align: left;
        }
        .right{
            width:461.5;
            height: 600px;
            background-color: red;
            float: right;
            padding-top: 200px;
            padding-right: 250px;
            text-align: left;
        }
        .list{
            background-color: pink;

        }
        li{
            list-style-type: none;
            line-height: 3em;
        }
    </style>
</head>
<body>
    <div class="head">
        <div class="photo">
            <img src="http://climg.mukewang.com/58c0d2d900016ce303000100.png"/>
        </div>
        <div class="words">
            <span>课程 职业 路径 实战 猿问 手记</span>
        </div>
    </div>
    <div class="body">
        <div class="left">        
            <h1>课程推荐</h1>
                <ul >
                    <li><span class="list">职业路径</span>&nbsp;&nbsp;HTML5与CSS3实现动态网页</li>
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        </div>
        <div class="right">
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        </div>
    </div>
    <div class="foot">
        <span>网站首页   企业合作   人才招聘   联系我们   常见问题   友情链接</span>
    </div>
</body>
</html>


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1回答

小丸子爱吃菜

2017-08-10

要加上单位:px。

祝学习愉快!

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