html css入门作业

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我是靠谱客的博主传统黑猫，最近开发中收集的这篇文章主要介绍html css入门作业，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

一、将五环（奥运）放在网页中间

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>css练习</title>
	<link rel="stylesheet" type="text/css" href="外部css1.css">
</head>
<body>
    <div class="plat">
    	<div class="a1"></div>
    	<div class="a2"></div>
    	<div class="a3"></div>
    	<div class="a4"></div>
    	<div class="a5"></div>
    </div>



</body>
</html>

*{
	margin: 0;
	padding: 0;
}
.plat{
	position: absolute;
	left: 50%;
	top: 50%;
	margin-left:-190px ;
	margin-top: -93px;

	height: 185px;
	width: 380px;
}
.a1,
.a2,
.a3,
.a4,
.a5{
	position:absolute;
	width: 100px;
	height: 100px;
	border: 10px solid black;
	border-radius: 50%;
}

.a1{
	border-color: red;
	left: 0;
	top: 0;
}
.a2{
	left: 130px;
	top: 0;
    border-color: yellow;
    z-index: 1;

}
.a3{
	left: 260px;
	top: 0;
    border-color: black;
}
.a4{
	left: 195px;
	top: 70px;
    border-color: green;
}
.a5{
	left: 65px;
	top: 70px;
    border-color: blue;
}

两栏布局

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<title>css练习</title>
	<link rel="stylesheet" type="text/css" href="外部css1.css">
</head>
<body>
    <div class="right"></div>
    <div class="left"></div>

</body>
</html>

*{
	margin: 0;
	padding: 0;
}
.right{
	position: absolute;
	width: 500px;
	height: 100px;
	background-color: pink;
	right: 0;
}
.left{
	margin-right: 100px;
	height: 100px;
	width: 500px;
	background-color: black;
}