双飞翼布局的实现方式:

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>双飞翼布局</title>
    <style>
        .container {
            margin: 0;
            padding: 0;
        }
        .container div {
            float: left;
        }
        .main {
            height: 100px;
            width: 100%;
            background: pink;
        }
        .left {
            width: 200px;
            height: 100px;
            margin-left: -100%;
            background: lightyellow;
        }
        .right {
            width: 300px;
            height: 100px;
            margin-left: -300px;
            background: #a8dbff;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="main"></div>
    <div class="left"></div>
    <div class="right"></div>
</div>
</body>
</html>