总结：
理解：float、 position在实战中的应用
实例
*{margin: 0;padding: 0;}
li{list-style: none; float: left;}
a{color: #000;text-decoration: none;}
.clear{clear: both;}
.mr{margin-right: 10px;}
.mt{margin-top: 20px;}
.r{float: right;}
.l{float: left;}
.contents{
width: 1540px;
margin: 0 auto;
}
.content{
width: 100%;
margin-top: 20px;
}
.contentul{line-height: 70px;}
small{color: #ccc;}
.hot-tv img{
width: 210px;
height: 320px;
}
.tab li{margin-left: 25px;}
.bigshow img{
width: 420px;
height: 320px;
}
.tv-tab img{
width: 210px;
height: 120px;
}
.tv-tab{
width: 1100px
}
.tv-tab li{margin:0 5px 30px;}
/*轮播模块*/
.header{
position: relative;
width: 100%;
height: 520px;
background: #072439;
}
.pic-show{
margin: 0 auto;
width: 1540px;
height: 520px;
background: url(../images/y1.jpg) no-repeat;
}
.bg{
background: url(../images/y.png);
width: 100%;
height:100%;
position: absolute;top: 0;left:0;
z-index: 999;
}
.head_r{position: absolute;top: 100px;z-index: 1000;right: 60px;}
.head_r_menu{
width: 190px;
padding: 0 15px;
background: rgba(0,0,0,0.5);
}
.head_r_menu a{
display: block;
line-height: 25px;
font-size: 14px;
padding: 15px 0;
color:rgba(254,254,254,0.5);
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
border-bottom: 1px solid rgba(174,147,147,0.4);
}
.head_r_menu a:hover{olor: #fff;}
.head_r_menu a:hover span{
font-size: 20px;display: block;color: #fff;
}
/*头部导航*/
.header_ul{
position: fixed;top:0;left: 70px; z-index: 1000;
}
.logo form{width: 500px;height: 40px;position: relative;left: 400px; display: inline-block;}
.logo input{width: 480px;height: 40px;border-radius: 100px; border: none;
background:rgba(234,234,243,0.5);
outline: none;
padding-left: 20px;
color:#fff;
}
.logo button {width: 90px;height: 40px;
border-top-right-radius:30px;
border-bottom-right-radius:30px;
background:#b30702;
border: none;
color: #fff;
position: absolute;top:0;right: 0;
}
.menu_li li{
position: relative;
padding: 0 10px;
text-align: center;
font-size: 12px;
}
.menu_li a,i{color: rgba(234,234,234,0.5);}
.menu_li i{font-size: 18px;}
.menu_li li:hover a{color: #48ADF2;}
.menu_li li:hover I{color: #48ADF2;}
.menu_li .box{
position: absolute; top:80px;right: -10px;
background: #fff;
padding: 20px;
display: none;
}
.menu_li p{color: #ccc;font-size: 16px; text-align: center;}
.menu_li button{
background: #2798ff;
color: #fff;
border:none;
height: 36px;width: 240px;
border-radius: 30px;
margin-top:15px;
}
.menu_li li:hover .box{display: block;}
.arrow{
width: 0;height: 7px;border: 7px solid;
border-color: transparent transparent #fff transparent;
position: absolute;top:-20px; right:30px;
}
.voltage li{width: 200px;font-size: 15px}
.voltage a {padding-right: 35px;color: #6D7076;}
.b_r{
border-right: 2px solid #f2f2f2;
height: 40px;
display: inline-block;
float:left;
margin-top: 2px;
margin-right: 35px;
}
li.hoc{
width: 110px;
padding: 0 10px;
}
li.hoc i{color: #666;font-size: 10px;}
.hot a{padding: 0;color: #666;}实例
<!DOCTYPE html>
<html>
<head>
<title>优酷-这世界很酷</title>
<link rel="icon" type="image/x-icon" href="static/images/1.ico">
<link rel="stylesheet" type="text/css" href="static/css/style.css">
<link rel="stylesheet" type="text/css" href="static/font-awesome/css/font-awesome.min.css">
</head>
<body>
<div class="header">
<!-- 轮播模块 -->
<div class="pic-show">
<div class="bg"></div>
<div class="contents head_r">
<div class="head_r_menu r">
<a href=""><span>2019两会闭幕 :</span>全程回顾解读热点</a>
<a href=""><span>以团之名 :</span>6进3公演神仙舞台</a>
<a href=""><span>都挺好:</span>明玉报复抄解气!</a>
<a href=""><span>以团之名 :</span>6进3公演神仙舞台</a>
<a href=""><span>这!就是原则 :</span>全程回顾解读热点</a>
<a href=""><span>这!就是原则 :</span>全程回顾解读热点</a>
<a href="" style="border: none;"><span>重耳传奇 : </span>王龙华王艳母子温馨团聚</a>
</div>
</div>
</div>
</div>
<!-- 顶部搜索导航 -->
<div class="contents header_ul">
<div class="logo l mt">
<a href=""><img src="static/images/logo.png" ></a>
<form action="" method="" >
<input type="text" name="">
<button>全网搜</button>
</form>
</div>
<ul class="menu_li r mt">
<li><i class="fa fa-bank" style="color: #c4a25a"></i><br><a href="" style="color: #c4a25a">VIP</a></li>
<li><i class="fa fa-feed"></i><br><a href="">订阅</a></li>
<li><i class="fa fa-clock-o"></i><br><a href="">记录</a></li>
<li><i class="fa fa-arrow-up"></i><br><a href="">上传</a></li>
<li><i class="fa fa-television"></i><br><a href="">客户端</a></li>
<li><a href=""><img src="static/images/80.png" width="30px" ></a>
<div class="box">
<span class="arrow"></span>
<p >登陆使用更多功能</p>
<button>登陆/注册</button>
</div>
</li>
</ul>
</div>
<div class="clear"></div>
</div>
<!-- header结束 -->
<div class="contents">
<div class="content">
<ul class="voltage">
<li><a href="">剧集</a><a href="">电影</a><a href="">综艺</a><a href="">动漫</a><a href="">娱乐</a><a href="">生活</a></li>
<span class="b_r"></span>
<li><a href="">剧集</a><a href="">电影</a><a href="">综艺</a><a href="">动漫</a><a href="">娱乐</a><a href="">生活</a></li>
<span class="b_r"></span>
<li><a href="">剧集</a><a href="">电影</a><a href="">综艺</a><a href="">动漫</a><a href="">娱乐</a><a href="">生活</a></li>
<span class="b_r"></span>
<li><a href="">剧集</a><a href="">电影</a><a href="">综艺</a><a href="">动漫</a><a href="">娱乐</a><a href="">生活</a></li>
<span class="b_r"></span>
<li style="width: 80px;"><a href="">娱乐</a><br><a href="">生活</a></li>
<span class="b_r"></span>
<li class="hoc"><i class="fa fa-feed"></i><br><a href="">优酷片库</a></li>
<li class="hoc"><i class="fa fa-bar-chart"></i><br><a href="">排行指数</a></li>
<li class="hoc"><i class="fa fa-angellist"></i><br><a href="">大鱼号精选</a></li>
<li class="hoc"><i class="fa fa-desktop"></i><br><a href="">下载应用</a></li>
</ul>
</div>
<div class="clear"></div>
</div>
<div class="contents">
<div class="content">
<div class="contentul">
<h2>正在热播</h2>
</div>
<ul class="hot-tv">
<li >
<a href="">
<img src="static/images\a.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/b.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/c.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/d.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/e.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/f.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li class="mr">
<a href="">
<img src="static/images/g.jpg"><br>
<span>雪地娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
</ul>
<div class="clear"></div>
</div>
<div class="content">
<h2 class="l">剧集 ></h2>
<ul class="tab">
<li class="l" style="margin-top: 5px; "><a href="">最新</a></LI>
<li class="l" style="margin-top: 5px; "><a href="">大陆剧</a></LI>
<li class="l" style="margin-top: 5px; "><a href="">台剧</a></LI>
<li class="l" style="margin-top: 5px; "><a href="">日剧</a></LI>
</ul>
<div class="clear"></div>
<div class="tv_show">
<div class="bigshow l ">
<a href="">
<img src="static/images/tv.jpg"> <br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</div>
<ul class="tv-tab l">
<li>
<a href="">
<img src="static/images/tv1.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv2.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv3.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv4.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv5.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv1.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv2.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv3.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv4.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
<li>
<a href="">
<img src="static/images/tv5.jpg"><br>
<span>娘子军</span>
</a><br>
<small>邱胜翊王笛演革命虐恋</small>
</li>
</ul>
</div>
</div>
</div>
</body>
</html>
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