css style control of checkbox will lose after convert to pdf

#28641

As the attached picture, when use checkbox in a row, the height of row became much higher than normal height.
checkbox is “larger” than texts of the document..

<table cellspacing="0px" cellpadding="0px" style="margin-left:20px;" width = "100%">
<tr>
<td>
<span class="cn">请单选</span><span class="en">Select One Option ONLY</span>
</td>
</tr>
<tr>
<td><input type="checkbox"/><span class="cn">单名帐户*</span><span class="en"> Sole A/C</span>
</td>
</tr>
</table>	

How to control the size of checkbox? it seems css style of checkbox will lose after html being converted to pdf. I want the checkbox being displayed same size as texts besides it.