代码如下
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>简单网页01</title>
<!-- 有时间加小图标(叫这?) -->
<link type="text/css" rel="stylesheet" href="./css/index.css">
</head>
<body>
<div id="main">
<div id="login">
<h2>登录(Login)</h2>
<input type="text" >
<input type="text" >
<button>登录</button>
</div>
</div>
</body>
</html>
*{
padding: 0;
margin: 0;
box-sizing: border-box;
}
#main{
position: relative;
width: 100%;
height: 100%;
background-color: aqua;
}
#login{
position: absolute;
width: 400px;
height:300px;
top:40%;
left:40%;
}
把width和height改成具体元素就可以了。不知道为什么,先埋坑,以后填。
*{
padding: 0;
margin: 0;
box-sizing: border-box;
}
#main{
position: relative;
width: 1000px;
height: 500px;
background-color: aqua;
}
#login{
position: absolute;
width: 400px;
height:300px;
top:40%;
left:40%;
}