.w990index {background:#0C012B url(ban.jpg) center 0 no-repeat; height:573px;}
.w990index .chongyang_ban {width:990px; margin:0 auto; height:573px; position:relative;}
.chongyang_ban a { position:absolute; width:173px; height:200px; bottom:22px; left:0;}
.chongyang_ban a.cy_link { width:990px; height:573px; top:0; left:0;}