使用 : after与：befor伪类画贯穿线

<div class="box">    用以上社交帐号直接登录</div>

<style>    .box{        width: ;<!--自定义-->        height: ;<!--自定义-->        text-align:center;        background-color:red;        position: relative;    }    .box::before{        content: "";        width: 40px; <!--自定义-->        border-top: 1px solid #ededed;        display: block;        position: absolute;        top: 8px;        left: 0;    }    .box::after{        content: "";        width: 40px; <!--自定义-->        border-top: 1px solid #ededed;        display: block;        position: absolute;        top: 8px;        right: 0;    }</style>