文字上下左右居中

 .loginline {
      height: 2px;
      background: #9a0000;
      width: 100%;
      display: flex;
      justify-content: center;
      align-items: center;
    }


  <div class="loginH1">文字<span style="font-size: 18px;line-height: 20px">●</span>文字</div>

div是折行用的，前面前台flex