console 命令行工具 X clear
console
<!DOCTYPE html>
<html>

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<meta http-equiv="X-UA-Compatible" content="IE=edge">
	<meta name="format-detection" content="telephone=no">
	<title>系统维护</title>
	<style>
		body {
			color: #666666;
			font-size: 12px;
			font-family: "微软雅黑", Verdana, Arial, Helvetica, sans-serif;
		}

		body,
		div {
			margin: 0;
			padding: 0;
		}

		.no_data {
			text-align: center;
			clear: both;
			background-color: #fafafa;
		}

		.no_dataImg {
			width: 240px;
			padding: 170px 0px 50px 0px;
		}

		.no_dataText {
			text-align: center;
			padding: 0px 0px 90px 0px;
			color: #bebebe;
			font-size: 24px;
			font-weight: bold;
		}

		.width100 {
			width: 100%;
		}
	</style>
</head>

<body>
	<div class="main-style">
		<div class="no_data">
			<img class="no_dataImg" src="https://cdn.jsdelivr.net/gh/cooldev-cn/cdn@latest/20200422231929.gif" alt="暂无数据">
        <div class="no_dataText">
            <p>系统维护中暂时关闭站点</p>
            <p>恢复时间请留意群公告</p>
        </div>
        <img class="width100" src="https://cdn.jsdelivr.net/gh/cooldev-cn/cdn@latest/20200422231946.png" alt="底部">
    </div>
</div>
</body>
</html>