<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
.auth-wrap {
position: fixed;
top: 0;
right: 0;
left: 0;
bottom: 0;
z-index: 99999;
background: rgba(0, 0, 0, 0.3);
text-align: center;
}
.auth-wrap::after {
content: "";
display: inline-block;
height: 100%;
0;
vertical-align: middle;
}
.message-box {
display: inline-block;
420px;
height: 300px;
vertical-align: middle;
background-color: #fff;
border-radius: 4px;
border: 1px solid #ebeef5;
font-size: 18px;
box-shadow: 0 2px 12px 0 rgb(0 0 0 / 10%);
text-align: left;
overflow: hidden;
backface-visibility: hidden;
}
</style>
</head>
<body>
<div class="auth-wrap">
<div class="message-box"></div>
</div>
</body>
</html>
