圣杯布局

<!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>圣杯布局</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        body {
            min-width: 600px;
        }

        header,
        footer {
            text-align: center;
            width: 100%;
            background-color: #bbbbbb;
        }

        .text {
            text-align: center;
            line-height: 200px;
            font-size: 40px;
            color: #fff;
        }

        .bd {
            overflow: hidden;
            padding: 0 200px 0 200px;
        }

        .main {
            float: left;
            width: 100%;
            height: 200px;
            background-color: #ddd;
        }

        .left {
            /* opacity: 0.5; */
            float: left;
            width: 200px;
            height: 200px;
            background-color: #da4242;
            /* 产生布局效果的属性 */
            margin-left: -100%;
            position: relative;
            left: -200px;
        }

        .right {
            /* opacity: 0.5; */
            float: left;
            width: 200px;
            height: 200px;
            background-color: #4ddef1;
            /* 产生布局效果的属性 */
            margin-left: -200px;
            position: relative;
            left: 200px;
        }
    </style>
</head>

<body>
    <header>圣杯布局</header>
    <div class="bd">
        <div class="main text">
            main
        </div>
        <div class="left text">
            left
        </div>
        <div class="right text">
            right
        </div>
    </div>
    <footer>footer</footer>
</body>

</html>

双飞翼布局

<!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>双飞翼布局</title>
    <style>
        * {
            padding: 0;
            margin: 0;
        }

        header,
        footer {
            text-align: center;
            width: 100%;
            background-color: #bbbbbb;
        }

        .text {
            text-align: center;
            line-height: 200px;
            font-size: 40px;
            color: #fff;
        }

        .bd {
            overflow: hidden;
        }

        .main {
            float: left;
            width: 100%;
            height: 200px;
            background-color: #ddd;
        }

        .main-content {
            margin: 0 200px;
        }

        .left {
            float: left;
            width: 200px;
            height: 200px;
            background-color: #da4242;
            /* 产生布局效果的属性 */
            margin-left: -100%;
        }

        .right {
            float: left;
            width: 200px;
            height: 200px;
            background-color: #4ddef1;
            /* 产生布局效果的属性 */
            margin-left: -200px;
        }
    </style>
</head>

<body>
    <header>双飞翼布局</header>
    <div class="bd">
        <div class="main text">
            <div class="main-content">main</div>
        </div>
        <div class="left text">
            left
        </div>
        <div class="right text">
            right
        </div>
    </div>
    <footer>footer</footer>
</body>

</html>