页面布局

需要制作出如下图片的效果：
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        body{
            margin: 0 auto;
        }
        .left{
            float: left;
        }
        .right{
            float: right;
        }
        .pg-header{
            height: 48px;
            background-color: #2459a2;
            color:white;
            line-height: 48px;
        }
        .pg-header .logo{
             200px;
            background-color:green;
            text-align: center;
        }
        .pg-header .user{
             160px;
            background-color: palegreen;
            height: 48px;
        }
        .pg-header .user .b{
            top: 48px;
            right: 95px;
            background-color: green;
            z-index: 20;
             160px;
            display: none;
        }
        .pg-header .user:hover .b{
            display: block;
        }
        .pg-header .user:hover{
            background-color: red;
        }
        .pg-header .user .b a{
            display: block;
        }
        .pg-content .menu{
            position: fixed;
            top: 48px;
            left: 0;
            bottom: 0;
            background-color: #dddddd;
             200px;

        }
        .pg-content .content{
            position: fixed;
            top: 48px;
            right: 0;
            bottom: 0;
            left: 200px;
            background-color:blue;
            overflow: auto;
            z-index: 10;

        }
    </style>
</head>
<body>
    <div class="pg-header">
        <div class="logo left">LOGO</div>
        <div class="user right" style="position: relative">
            <a>
                <img style=" 40px;height: 40px;margin-top: 4px;border-radius: 50%;" src="4.jpg">
            </a>
            <div class="b" style="position: absolute">
                <a>我的资料</a>
                <a>退出</a>
            </div>
        </div>
    </div>
    <div class="pg-content">
        <div class="menu"></div>
        <div class="content">
            <div style="height: 5000px">fdsa</div>
        </div>
    </div>
</body>
</html>