HTML 练习实现鼠标移到用户图像展示更多信息

<!doctype html>
<html lang="en">
<head>
    <meta charset="utf-8">
    <title>title</title>
    <style>
        body{
            margin: 0;
        }

        .right{
            float: right;
        }

        .pg-header{
            height: 48px;
            line-height: 48px;
            background-color: #303a40;
            color: white;
        }

        .pg-header .logo{
            float: left;
            width: 200px;
            text-align: center;
        }

        .pg-header .user{
            padding: 0 20px;
            height: 48px;
            position: relative;
        }

        .pg-header .user:hover{
            background-color: #425a66;
        }

        .pg-header .user .a{
            height: 48px;
        }

        .pg-header .user .a img{
            width: 40px;
            height: 40px;
            margin-top: 4px;
            border-radius: 50%;
        }

        .pg-header .user .more{
            width: 200px;
            border: 1px solid darkgreen;
            position: absolute;
            top: 48px;
            right: 20px;
            background-color: #c0c0c0;
            display: none;
            z-index: 9999;
        }

        .pg-header .user:hover .more{
            display: block;
        }

        .pg-header .user .more a{
            display: block;
        }

        .pg-body .body-menu{
            position: absolute;
            top: 50px;
            bottom: 0;
            left: 0;
            width: 200px;
            border: 1px solid #336699;
        }

        .pg-body .body-content{
            position: absolute;
            top: 50px;
            bottom: 0;
            left: 210px;
            right: 0;
            border: 1px solid #336699;
            overflow: auto;
            z-index: 10;
        }

    </style>
</head>
<body>
<div class="pg-header">
    <div class="logo">hello python</div>

    <div class="user right" style="position: relative">
        <div class="a">
            <img src="1.jpg">
        </div>
        <div class="more">
            <a>我的信息</a>
            <a>注销</a>
        </div>
    </div>
</div>
<div class="pg-body">
    <div class="body-menu"></div>
    <div class="body-content">
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
        <p>klvchen</p><p>klvchen</p><p>klvchen</p>
    </div>

</div>
</body>
</html>