SOURCE

<div class="container">
    <div class="center">
        <div class="inner">双飞翼布局</div>
    </div>
    <div class="left"></div>
    <div class="right"></div>
</div>

.container {
    min-width: 600px
}

.center {
    width: 100%;
    height: 500px;
    background: yellowgreen;
    float: left;
}

.center .inner {
    margin: 0 200px
}

.left {
    width: 200px;
    height: 400px;
    float: left;
    background: lightblue;
    margin-left: -100%;
}

.right {
    width: 200px;
    height: 400px;
    float: left;
    background: lightcoral;
    margin-left: -200px;
}