浮动与定位4-4自由编程作业提交

麻烦老师看看我做的4-4自由编程作业

以下是代码

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="css/css.css">
</head>
<body>
    <header>
        <div>
            <div class="logo">Career Builder</div>
            <ol>
                <li>HOME</li>
                <li>ABOUT</li>
                <li>GALLERY</li>
                <li>FACILITY</li>
                <li>EVENTS</li>
                <li>CONTACT</li>
            </ol>
        </div>
    </header>
</body>
</html>

* {
    margin: 0;
    padding: 0;
}
ol, ul {
    list-style:none;
}
header {
    width:100%;
    height: 80px;
    background-color: #07cbc9;
}
header div {
    width:1200px;
    margin:0 auto;
    color:white;
    padding:16px 0;
}
header div .logo {
    width:600px;
    float: left;
    font-size:48px;
    font-family:Arial, Helvetica, sans-serif;
    margin-top:-20px;
}
header div ol {
    width:600px;
    float: right;
}
header div ol li {
    float: right;
    width:80px;
    font-size:16px;
    margin-top:16px;
    margin-left:20px;
}