最终使表格与图像居中对齐

Question

center {
  text-align: center;
  border: 3px solid rgb(161, 161, 161);
}

<div class="col-md-12" style="background-color: rgb(173, 173, 173)" style="width: 100">
  <h1 class="center">Sign up for our newsletter! </h1>
  <br>
  <br>
  <br>
  <br>
  <br>
  <br>

</div>

Answer 1

您可以使用以下CSS将块垂直居中

display:flex;
align-content:middle;
justify-content:center;