popup.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>NETWORK-PLUS</title>
    <style>
        .popup-box {
            width: 300px;
            padding: 10px;
            background: #fff;
        }
        p {
            font-size: 14px;
        }
        p span {
            display: inline-block;
            background-color: #fff5f5;
            color: #ff502c;
            font-size: 14px;
            padding: .065em .4em;
            border-radius: 2px;;
            margin: 0 3px;
        }
    </style>
</head>
<body>
    <div class="popup-box">
        <p>windows系统请按<span>F12</span>进入开发者页面</p>
        <p>Mac OS系统请按<span>option</span>+<span>command</span>+<span>i</span>进入开发者页面</p>
        <p>进入后选择<span>Network PLUS</span>选项卡开始调试</p>
    </div>
</body>
</html>