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<div class="footer">    <div class="main100 ft"></div>    <div class="main100 foot">        <div class="main bff p_bo_10 c_fff">            <ul class="te_ce m_to_10">                <a href="#" class="m_lere_10 c_fff" rel="nofollow">關於我們</a><span>|</span>            </ul>        </div>    </div></div>

.footer{ position:relative; overflow:hidden;}.ft{ height:75px; background:#fff; opacity:0.3; filter:alpha(opacity=30);}.foot{ height:75px; position:absolute; left:0; top:0; overflow:hidden;}