1:
<div style="width:100%;height:500px">
</div>
2:
<div style="width:200px;height:100px;position:absolute;top:50%;left:50%;margin-top:-100px;margin-left:-100px">
</div>solve: Center the text horizontally and vertically (to ensure normal line wrapping, so you can"t use line-height)
horizontal center: text-align: center;
Vertical center:
div {
display: table-cell;
vertical-align: middle;
}here has a set of centered methods and demo.
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o ...
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