垂直对齐中间文本，不带行高和表格单元格

Question

我有一个带"toggle"-动画的Teaser，可以在JSFiddle或下面看到：

.ax {
    height:60px;
    width:150px;
    background:gold;
}
 .caption {
position: absolute;
    left:0;
  top: 35%;
  overflow: hidden;
  right: 0;
  background-color: rgba(24,88,140,0.7);
  width: 100%;
  height: 52px;
  z-index: 2;
  -o-transition: 500ms;
  -webkit-transition: 500ms;
  -moz-transition: 500ms;
  -ms-transition: 500ms;
  transition: 500ms;
  font-weight: lighter;
  padding: 10px;
  color: #fff;
}
a.link{
  color: #fff;
  overflow: hidden;
  width: 80%;
  margin-bottom: 30px;
  font-weight: lighter;
  font-size: 16px;
  line-height: 22px;
}
 .caption:hover {
  height: 100%;
  top: 0;
}
.box {
    position:relative;    
    width:250px;
    height:200px;
}
/*TABLE CELL METHOD*/
 .caption2 {
     position: absolute;
    left:0;
  top: 35%;
  overflow: hidden;
  right: 0;
  background-color: rgba(24,88,140,0.7);
  width: 100%;
  height: 52px;
  z-index: 2;
  -o-transition: 500ms;
  -webkit-transition: 500ms;
  -moz-transition: 500ms;
  -ms-transition: 500ms;
  transition: 500ms;
  font-weight: lighter;
  padding: 10px;
  color: #fff;
    display:table;
   
}
 .caption2:hover {
  height: 100%;
  top: 0;
}
a.link2{
    display:table-cell;
   vertical-align: middle;
  overflow: hidden;
  width: 80%;
  margin-bottom: 30px;
  font-weight: lighter;
  font-size: 16px;
  line-height: 22px;
}

<div class="box">
<div class="caption">
<a href="#" class="link">Lorem Ipsum blabla bla blahah ipsum lorem blablablahh</a>
<p class="captiontext">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> 
</div>
</div><br><br
<br><br>
    table cell method (div.caption2 display:table and a.link display:table-cell + vertical-algin:middle)
    <br><br>
        
<div class="box">
<div class="caption2">
<a class="link2" href="#">Lorem Ipsum blabla bla blahah ipsum lorem blablablahh</a>
<p class="captiontext">Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> 
</div>
</div>

我想在蓝色框的垂直中心对齐链接。链接可以是单行或两行（最多），但应始终垂直居中。CSS属性lineheight不适用于两行链接，而表（-cell）-方法也不适用（见上文）。

有没有办法在我的盒子里同时居中一行和两行链接？

Answer 1

显示类型"Flexbox"可能对此很有用。将此CSS应用于要居中的子项的父项：

display: flex;
flex-direction: column;
justify-content: center;

Answer 2

要垂直居中任何元素，可以应用以下样式：

.element
{
    position: relative;
    top: 50%;
    transform: translateY(-50%);
}

为了复制当前样式，您必须将表单元格替换为列。这要归功于Sebastian Ekstrom的解决方案。

Answer 3

另一种方法是在伪元素上垂直对齐：

https://codepen.io/darxide/pen/xRmYdQ

<div class="block" style="height: 300px;">
    <div class="centered">
        vertical center
    </div>
</div>

.block:before {
  content: ' ';
  display: inline-block;
  height: 100%; 
  vertical-align: middle;
}
.centered {
  display: inline-block;
  vertical-align: middle;
}