css考核点整理（六）-水平居中定位的几种方式

•  定宽   

text-align: center
父容器position：relative；子容器 position:absolute;left:50%; margin-left: 宽度/2

.Center-Container {
  position: relative;
}

.Absolute-Center {
  width: 50%;
  height: 50%;
  overflow: auto;
  margin: auto;
  position: absolute;
  top: 0; left: 0; bottom: 0; right: 0;
}

• 不定宽

display:inline-block; vertical-align:middle;

 参考文章

http://blog.csdn.net/freshlover/article/details/11579669