qzm · December 8, 2016 14:29 · qzm · Dec 8, 2016
diff --git a/popup.html b/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>Document</title>
    <style>
        .popup {
            /* 垂直，水平居中 */
            position: absolute;
            top: 50%;
            left: 50%;
            margin-left: -150px;
            margin-top: -60px;
            /* 样式 */
            border: 1px #CCC solid;
            border-radius: 5px;
            box-shadow: 5px 5px 5px #DDD;
            width: 300px
        }

        .popup-header,
        .popup-body {
            padding: 5px 10px;
        }

        .popup-header {
            font-size: 24px;
            background-color: #EEE;
            border-radius: 5px 5px 0 0;
            font-weight: bold;
            border-bottom: 1px #CCC solid;
        }

        .popup-triangl-frent,
        .popup-triangl-back {
            position: absolute;
            left: 130px;
            height: 0;
            width: 0;
            border-width: 15px;
            border-style: solid;
        }

        .popup-triangl-back {
            top: -30px;
            border-color: transparent transparent #CCC transparent;
        }

        .popup-triangl-frent {
            top: -28px;
            border-color: transparent transparent #eee transparent;
        }
    </style>
 </head>

 <body>
    <div class="popup">
        <div class="popup-header">
            <div>Title</div>
        </div>
        <div class="popup-body">
            <p>Paragraph</p>
            <p>Paragraph</p>
            <p>Paragraph</p>
        </div>
        <div class="popup-triangl-back"></div>
        <div class="popup-triangl-frent"></div>
    </div>
 </body>

 </html>