console
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Layout</title>
<style media="screen">
html * {
padding: 0;
margin: 0;
}
.layout article div {
min-height: 150px;
color: #ffffff;
}
.layout.flexbox .left-center-right{
display: flex;
}
.layout.flexbox .left {
width: 300px;
background: red;
}
.layout.flexbox .center {
background: yellow;
flex: 1;
color: #000000;
}
.layout.flexbox .right {
width: 300px;
background: blue;
}
</style>
</head>
<body>
<!--flexbox -->
<section class="layout flexbox">
<article class="left-center-right">
<div class="left">left</div>
<div class="center">
center
</div>
<div class="right">right</div>
</article>
</section>
</body>
</html>