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.m_banner{ background:#fff;height:255px; position:relative;width:100%;min-width:975px;}
.m_banner .banner{height:255px;width:100%; position:absolute;top:0;left:0; background-position:center top;}
.banner_ctrl{ height:100px;width:960px;position:absolute;top:50%;left:50%;margin:-50px 0 0 -480px;z-index:2;}
.banner_ctrl a{ display:block;width:30px;height:100px; background:url(../img/banner_ctrl.png) no-repeat; position:absolute; opacity:.1;filter: alpha(opacity=10);
-moz-opacity:0.1;}
.banner_ctrl a.prev{left:0px;}
.banner_ctrl a.next{right:0px; background-position:-30px 0;}
.m_banner .banner .main_c{ position:relative;z-index:10;height:388px;}

.nr img{ width:100%}