flex 水平平分布局

效果

 

HTML

    <ul class="box">
        <li class="b-title">标题一</li>
        <li class="b-title">标题二</li>
        <li class="b-title">标题三</li>
    </ul>

 

CSS

        .box {
            display: flex;
        }

        .b-title {
            flex: 1;
            border: 1px solid red;
            height: 80px;
            display: flex;
            align-items: center;
            justify-content: center;
        }