div+css居中

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="css/reset.css">
    <style type="text/css">
        html,body{
            100%;
            height:100%;
            position: relative;
            background-color: #7a43b6;
        }
        .container {
            85%;
            height: 85%;
            position: absolute;
            left: 0;
            top: 0;
            right: 0;
            bottom: 0;
            margin: auto;
            background-color: #00b3ee;
        }
        .content{
            85%;
            height:85%;
            position: absolute;
            left: 0;
            top: 0;
            right: 0;
            bottom: 0;
            margin: auto;
            background-color: #4cae4c;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="content"></div>
</div>
</body>
</html>
复制直接运行即可
VR虚拟现实