Vertical align cannot align the picture and text vertically

  problem ：

Use vertical-align: middle; You can't center the picture and text vertically .

In this way HTML For example ：

<div class="footer">
    <div class="wrapper">
      <div class="top">
        <ul>
          <li>
            <!--  Add labels through pseudo elements , Implement the wizard diagram  -->
            <span> I'm Gru </span>
          </li>  
        </ul>
      </div>
    </div>
</div>

Solution steps ：

1. Use vertical-align: middle; You can't center the picture and text vertically , The text is above .

/*  Tags added by pseudo elements    inline  */
.footer .top li::before {
  /* 1. Not centered  */
  vertical-align: middle;
}

2. Use line-height , At this time, the picture is lower .

.footer .top li {
  /* 2. Add line height , Picture down  */
  line-height: 58px;
  height: 58px;
}

3. Try positioning , Let the picture and the text be at the same starting point , Then add margin-left Move back a distance .

.footer .top li {
  position: relative;
}

/*  Tags added by pseudo elements    inline  */
.footer .top li::before {
  /* 3. Absolute positioning  */
  position: absolute;
  top: 0;
  left: 0;
}

.footer .top li span {
  /* 3. Then adjust the position.  */
  margin-left: 77px;
}

  summary ：

Positioning may cause a chain reaction , So when adjusting , it is to be noted that , When is the parent , Which children are included under the parent , Wait a series （ At present, there is no in-depth discussion ）.