CSS樣式無法覆蓋樣式的解決方案
<style>
 .aaa h3{
  color:#FF0000;
  font-size:50px;
 }
 .bbb h3{
  color:#0AFF00
      
 }
</style>
<div class=”aaa”>
    <div class=”bbb”>
        <h3>test</h3>
    </div>
</div>
改用id
<style>
 .aaa .bbb h3{
  color:#FF0000;
  font-size:50px;
 }
 #ccc h3{
  color:#0AFF00
 }
</style>
<div class=”aaa”>
    <div class=”bbb” id=”ccc”>
        <h3>test</h3>
    </div>
</div>
延伸閱讀
http://stackoverflow.com/questions/9956467/overriding-styles-without-important