flex实现一行三列均分宽度布局

平时没怎么用flex布局，有点陌生，调了一个样式出来，这个布局适合很多场景下的应用。
除了实现一行三列均分宽度，还特别设计了一个跨两列，跨三列的样式。
flex实现一行三列均分宽度布局.png

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <title>数据可视化</title>
    <style>
        .box{
            min-width:600px;
            max-width: 2000px;
            border:1px solid #ddd;
            margin:0 auto;
            display: flex;
            flex-flow: row wrap;
        }
        .box .panel{
            flex: 0 0 33.3333%;
        }
        .box .panel.two{
            flex:0 0 66.6666%;
        }
        .box .panel.three{
            flex:0 0 100%;
        }
        .box .panel .item{
            background-color:burlywood;
            display: block;
            text-align: center;
            margin:10px 10px;
            height: 40px;
        }
    </style>
</head>
<body>
<div class="box">
    <div class="panel">
        <div class="item">1</div>
    </div>
    <div class="panel">
        <div class="item">2</div>
    </div>
    <div class="panel">
        <div class="item">3</div>
    </div>
    <div class="panel two">
        <div class="item">4</div>
    </div>
    <div class="panel">
        <div class="item">5</div>
    </div>
    <div class="panel">
        <div class="item">6</div>
    </div>
    <div class="panel two">
        <div class="item">7</div>
    </div>
    <div class="panel three">
        <div class="item">8</div>
    </div>
    <div class="panel">
        <div class="item">9</div>
    </div>
    <div class="panel">
        <div class="item">10</div>
    </div>
</div>
</body>
</html>

董川民