用僞元素畫線

<style type="text/css">
    .or{
        width: 450px;
        text-align: center;
        position: relative;
    }
    .or:before,.or:after{
        content: '';
        position: absolute;
        width: 200px;
        height: 1px;
        background: #ccc;
        top: 50%;
        transform: translateY(-50%);
    }
    .or:before{
        left: 0;
    }
    .or:after{
        right: 0;
    }
</style>
<p class="or">or</p>