头歌：CSS id选择器
第1关 CSS id选择器
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>ID选择器</title>
<style type="text/css">
/* 元素选择器 */
html {
background-color: #F0F0F0;
}
header {
padding: 40px;
background-color: white;
}
footer {
margin-top: 20px;
font-size: 0.6em;
color: grey;
}
/* 类选择器 */
.main {
margin: 10px;
}
.newsSection {
margin-top: 20px;
padding: 20px;
background-color: white;
}
/* ********** BEIGN ********** */
#chosen {
color: red;
font-weight: bold;
}
#news {
color: blue;
font-weight: bold;
}
#finance {
color: olive;
font-weight: bold;
}
#think {
color: green;
font-weight: bold;
}
#life {
color: orange;
font-weight: bold;
}
/*选择menu元素下的li子元素*/
#menu li {
float: left;
width: 70px;
font-size: 1.2em;
font-weight: lighter;
}
/*选择menu元素下的li子元素和li下得a子元素*/
#menu li, li a {
list-style: none;
text-decoration: none;
}
/* ********** END ********** */
</style>
</head>
<body>
<div class="main">
<!-- ********** BEGIN ********** -->
<header id=menu >
<!-- ********** END ********** -->
<li><a href="#chosen">精选</a></li>
<li><a href="#news">时事</a></li>
<li><a href="#finance">财政</a></li>
<li><a href="#think">思想</a></li>
<li><a href="#life">生活</a></li>
</header>
<div class="newsSection">
<section >
<h2 id="chosen">精选</h2>
<li>精选新闻1</li>
<li>精选新闻2</li>
<li>精选新闻3</li>
</section>
<section>
<h2 id="news">时事</h2>
<li>时事新闻1</li>
<li>时事新闻2</li>
<li>时事新闻3</li>
</section>
<section>
<h2 id="finance">财政</h2>
<li>财政新闻1</li>
<li>财政新闻2</li>
<li>财政新闻3</li>
</section>
<section>
<h2 id="think">思想</h2>
<li>思想新闻1</li>
<li>思想新闻2</li>
<li>思想新闻3</li>
</section>
<section>
<h2 id="life">生活</h2>
<li>生活新闻1</li>
<li>生活新闻2</li>
<li>生活新闻3</li>
</section>
</div>
<footer>Copyright (c) News Copyright Holder All Rights Reserved.</footer>
</div>
</body>
</html>