CSS布局练习

<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Page Title</title>
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" type="text/css" media="screen" href="test7-8.css" />
</head>
<body>
    <header>
        <div id="logo">
            <h2>Logo</h2>
            <div>
                <a>Github</a> <a>Register</a> <a>Login</a>
            </div>
        </div>
    </header>

    <div id="banner">
        <div id="haha">
            <div id="hahaha">
                <div class="click">1</div>
                <div class="click">2</div>
                <div class="click">3</div>
                <div class="click">4</div>
            </div>
        </div>
    </div>
    
    <nav>
        <div>
            <div>HOME</div>
            <div>PROFILE</div>
            <div>ABOUT</div>
        </div>
    </nav>

    <main>
        <div class="flex1">
            <div class="content">This is Content 1</div>
            <div class="content">MaybeContent 2</div>
            <div class="content">Content 3</div>
        </div>
        <div class="flex2">
            <div class="content">Content 4</div>
            <div class="content">Content 5</div>
            <div class="content">Content 6</div>
            <div class="content">Content 7</div>
        </div>
        <div class="flex1">
            <div class="content">Content 8</div>
            <div class="content">Content 9</div>
            <div class="content">Content 10</div>
        </div>
    </main>

    <footer>
        <div>&copy; 2018 ife.baidu.com</div>
    </footer>
</body>
</html>

* {
    font-family: "Microsoft YaHei";
}

header {
    width: 100%;
    background-color: black;
}

#banner {
    background-color: rgb(153, 204, 51);
    width: 100%;
    height: 200px;
}

#haha {
    width: 960px;
    height: 200px;
    margin: 0 auto;
}

#hahaha {
    width: 100px;
    height: 20px;
    float: right;
    display: flex;
    justify-content:center;
    align-items:center;
    margin-top: 175px;
}

.click {
    text-align: center;
    width: 15px;
    height: 20px;
    margin-left: 5px;
    border-left: 1px solid gray;
    border-right: 1px solid gray;
    background-color: rgb(208, 243, 202);
}

footer {
    width: 100%;
    height: 100px;
    background-color: gray;
    text-align: center;
    color: white;
}

nav {
    width: 100%;
    height: 75px;
    border-bottom: 1px solid gray;
}

nav > div {
    width: 960px;
    height: 75px;
    margin: 0 auto; 
    font-size: 0;
}

nav div div {
    display: inline-block;
    border: 1px solid gray;
    border-bottom: none;
    height: 50px;
    width: 100px;
    text-align: center;
    line-height: 50px;
    margin-top: 25px;
    font-size: 16px;
    border-top-left-radius: 1.5em;
    border-top-right-radius: 1.5em;
}

main {
    width: 960px;
    margin: 0 auto;
}

.flex1 {
    display: flex;
    margin-top: 10px;
    margin-bottom: 10px;
    justify-content: space-between;
}

.flex2 {
    display: flex;
    margin-top: 10px;
    margin-bottom: 10px;
    justify-content: space-between;
}

.content {
    text-align: center;
    padding: 80px;
    border: 1px solid gray;
    flex-grow: 1;
}

#logo {
    width: 960px;
    height: 75px;
    margin: 0 auto;
}

header h2 {
    color: white;
    float: left;
}

header > div > div{
    color: white;
    float: right;
}

a {
    text-decoration: underline;
}

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