圣杯布局和双飞翼布局

<div id="header">header</div>
    <div id="container">
        <div id="center" class="colomu"></div>
        <div id="left" class="colomu"></div>
        <div id="right" class="colomu"></div>
</div>
 <div id="footer">footer</div>

body{
            min-width: 550px;
        }
        #header,#footer{
            height: 50px;
            background-color: aqua;
            text-align: center;
        }
        #container {
            padding-left: 200px;
            padding-right: 150px;
            height: 100px;
        }
        #container .colomu{
            float: left;
        }
        #center{
            /* left被挤到了下一行 */
            width: 100%;
            background-color: blueviolet;
            height: 100px;
        }
        #left{
            /* margin的百分比是相对于父元素说的，margin-left=-100%相当于距离conter元素的右边框200px */
            width: 200px;
            height: 100px;
            margin-left: -100%;
            background-color: aquamarine;
            position: relative;
            right: 200px;
        }
        #right{
            width: 150px;
            height: 100px;
            background-color: aquamarine;
            margin-right: -150px;
        }
        #footer{
            clear: both;
        }

 <div id="header">header</div>
    <div id="container" class="column">
        <div id="center">center</div>
    </div>
    <div id="left" class="column">left</div>
    <div id="right" class="column">right</div>
    <div id="footer">footer</div>

 body {
            min-width: 500px;
        }

        div {
            height: 100px;
        }

        #header,
        #footer {
            background-color: aquamarine;
        }

        #container {
            width: 100%;
        }

        .column {
            float: left;
        }

        #center {
            margin-left: 200px;
            margin-right: 150px;
            background-color: blueviolet;
        }

        #left {
            width: 200px;
            background-color: aqua;
            margin-left: -100%;
        }

        #right {
            width: 150px;
            background-color: aqua;
            margin-left: -150px;
        }


        #footer {
            clear: both;
        }