dom结构
<body>
<div class="container">
<div class="item">头条</div>
<div class="item">推荐</div>
<div class="item">新闻</div>
<div class="item">娱乐</div>
<div class="item">财经</div>
<div class="item">军事</div>
<div class="item">汽车</div>
<div class="item">体育</div>
</div>
</body>
css：
.container{
padding:20px 10px;
background:green;
display:flex;
justify-content:space-between;
flex-wrap:wrap;
}
.item{
border:1px solid #000;
background:#fff;
margin-bottom:10px;
text-align:center;
padding:5px 0;
box-sizing:border-box;
width:23%;
}
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