CSS图片垂直居中

<div class="imgWrap">
  <div class="align-middle">
	<a href="/"><img class="logo" src="./images/logo.png" alt="Terwer"/></a>
  </div>
</div>

/**
* 图片居中
*/
#header .imgWrap .align-middle {
  height: 75px;
  text-align: center;
}
#header .imgWrap .align-middle:before {
  content: " ";
  display: inline-block;
  vertical-align: middle;
  height: 100%;
}

#header .imgWrap .logo {
  display: inline-block;
  max-height: 40px;
}