请教2-6视频的m-bottom中img03左浮动时掉了下去，为什么没有实现效果呢？
我后来设置了另一个class=img3
.main .middle .m-bottom .img3{
transform: translate(320px, -310px)
}
按照这个css代码img03浮上去，为什么我按照老师的视频里的代码打的，为什么会出现这种情况呢？我是哪一步骤没做好？请老师指导一下，万分感谢！！
正在回答
同学你好，是因为同学第二个图片部分占据的宽度较大，我们可以按f12查看下控制台：
第二列实际占据的宽度为350px。是因为同学的标签嵌套错了，把第三张图片放到了第二张里，所以布局就乱掉了。修改参考：
再将下方的translate去掉，按顺序自动排列就可以：
如果我的回答帮助到了你，欢迎采纳，祝学习愉快~
<!DOCTYPE html>
<html>
<head>
<title>CSS网页布局</title>
<meta charset="utf-8">
<style type="text/css" >
*{
padding: 0;
margin:0;
}
.header{
width:100%;
height:100px;
}
.header img{
width: 300px;
height:85px;
padding-left: 100px;
padding-top: 8px;
}
.header .logo{
float:left;
}
.header .nav{
float: right;
}
.header .nav ul {
padding-right: 100px;
}
.header .nav ul li{
float: left;
list-style: none;
width:80px;
height: 100px;
line-height: 100px;
font-size: 15px;
font-weight: bold;
color:#7d7d7d;
}
.main .top{
width:100%;
height: 600px;
}
.main .top img{
width:100%;
height: 600px;
}
.main .topLayer{
position: absolute;
top: 100px;
left: 0;
background-color: #000;
width:100%;
height:600px;
opacity: 0.5;
}
.main .topLayer-top{
width: 500px;
height: 300px;
/*background-color: blue; 去掉蓝色背景*/
position: absolute;
top: 400px;
margin-top: -150px;
z-index: 2;
right:50%;
margin-right:-250px;
}
.main .topLayer-top .word{
padding-top: 100px;
color:#fff;
font-size: 45px;
font-weight: bolder;
text-align: center;
font-family: "微软雅黑";
}
.main .topLayer-top button{
width:200px;
height:60px;
margin-top: 50px;
color:#fff;
background-color: #F5704F;
font-family: "微软雅黑";
text-align: center;
font-weight: bolder;
font-size: 14px;
border-radius:8px;
margin-left:150px;
}
.main .middle{
width:1000px;
margin:0 auto;
}
.main .middle .m-top .commen{
float:left;
width:33.3%;
padding-top: 50px;
text-align: center;
}
.main .middle .m-top .commen img{
width:100px;
height:100px;
}
.main .middle .m-top .commen .comm{
font-size: 20px;
color:#7D7C7F;
font-weight: bold;
padding-top: 20px;
}
.main .middle .m-middle{
font-size: 22px;
color:#E19796;
font-weight: bold;
padding-top: 50px;
font-style: italic;
text-align: center;
padding-bottom: 50px;
}
.main .middle .m-bottom{
width: 990px;
margin:0 auto;
}
.main .middle .m-bottom .m-com{
padding:10px;
float: left;
text-align: center;
font-size: 20px;
font-weight: bold;
}
.main .middle .m-bottom .m-com img{
width:310px;
height:260px;
}
.main .middle .m-bottom .img3{
transform: translate(340px, -348px)
}
.main .middle .m-bottom .m-com .des1{
color:#7D7C7F;
padding-top: 20px;
}
.main .middle .m-bottom .m-com .des2{
color:#BDBDBC;
padding-top: 10px;
}
.main .bottom{
background-color: #F9F9F9;
transform: translate(12px, -300px)
}
.main .bottom .content{
width:1000px;
margin: 0 auto;
}
.main .bottom .content .title{
text-align: center;
font-size: 20px;
font-weight: bold;
color: #7D7C7F;
font-family: "微软雅黑";
padding-bottom: 50px;
}
.main .bottom .content .pic-content dl{
float: left;
width: 470px;
margin: 10px 12px;
}
.main .bottom .content .pic-content dl img{
width: 470px;
height: 460px;
}
.main .bottom .content .pic-content dl .word{
padding-top: 20px;
font-size: 20px;
font-weight: bold;
color: #7D7C7F;
padding-bottom: 50px;
}
.footer{
width: 100%;
height: 100px;
background-color: #292C35;
color: #ffffff;
text-align: center;
line-height: 100px;
font-family: "微软雅黑";
font-size: 15px;
}
</style>
</head>
<body>
<!--header-->
<div class="header">
<div class="logo">
<img src="image/logo.png" alt="pic">
</div>
<div class="nav">
<ul>
<li>首页</li>
<li>图片</li>
<li>视频</li>
<li>手记</li>
</ul>
</div>
</div>
<!--main container-->
<div class="main">
<div class="top">
<img src="image/1.jpeg" />
</div>
<!--topLayer-->
<div class="topLayer"></div>
<div class="topLayer-top">
<div class="word">MY BEAUTIFUL LIFE</div>
<button>LOOK MORE ></button>
</div>
<div class="middle">
<div class="m-top">
<div class="commen weibo">
<img src="image/weibo.png">
<div class="comm">MICROBLOG</div>
</div>
<div class="commen weixin">
<img src="image/weixin.png">
<div class="comm">WECHAT</div>
</div>
<div class="commen qq">
<img src="image/QQ.png">
<div class="comm">QQ</div>
</div>
</div>
<div style="clear:both;"></div>
<div class="m-middle">
"I want to give good things to record down,<br/>after recall will be very beautiful."
</div>
<div class="m-bottom">
<div class="m-com">
<img src="image/03-01.jpg" />
<div class="des1">Cool Image</div>
<div class="des2">Record The Picture</div>
</div>
<div class="m-com">
<img src="image/03-02.jpg" />
<div class="des1">Great Picture</div>
<div class="des2">Record The Picture</div>
<div class="m-com img3">
<img src="image/03-03.jpg" />
<div class="des1">Cool Image</div>
<div class="des2">Record The <span>Picture</span></div>
</div>
</div>
<div style="clear:both;"></div>
<div class="bottom">
<div class="content">
<div class="title">FROM THE PHOTO ALBUM</div>
<div class="pic-content">
<dl>
<dt>
<img src="image/04-01.jpg" />
</dt>
<dd class="word">Life is like a book, just read more and more refined, more write more carefully. When read, mind open, all things have been indifferent to heart. Life is the precipitation.</dd>
</dl>
<dl class="img4">
<dt>
<img src="image/04-02.jpg">
</dt>
<dd class="word">Life is like a cup of tea, let people lead a person to endless aftertastes. You again good taste, it will always have a different taste, different people will have different taste more.</dd>
</dl>
</div>
<div style="clear: both;">
</div>
</div>
</div>
<div style="clear:both;"></div>
<!--footer-->
<div class="footer">© 2016 imooc.com 京ICP备13046642号</div>
</body>
</html>
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