div#thing {
position: absolute;
top: 0px;
z-index: 2;
margin: 0 auto;
}
<div id="thing">
<p>text text text with no fixed size, variable font</p>
</div>
div在顶部,但我不能用<center>
或margin: 0 auto
居中;
https://stackoverflow.com/questions/252856
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