背景透明而字不透明

<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">关于我们</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;}