.main{ width:944px; margin:auto; background-color:#dad6cb}
.l1{ background:url(../images/l5.jpg); width:233px; height:734px; color:#555555}
.l2{ width:437px;}
.l2 ul li{ float:left; width:109px; height:45px; cursor:pointer}
.tab1{ background:url(../images/btn01.jpg) 0 45px}
.tab2{ background:url(../images/btn02.jpg)  0 45px}
.tab3{ background:url(../images/btn03.jpg)  0 45px}
.tab4{ background:url(../images/btn04.jpg)  0 45px}
.xuanzhong{background-position:0px 0px;}
.l3{ width:255px;}
.mb{ background:url(../images/bj.jpg); width:436px; height:690px;}
.mb2{ width:410px; margin:auto; line-height:24px;}
.mb2 a{  color:#555555; font-weight:bold }

.b1{ width:925px; margin:auto; }
.b2{ background:url(../images/b2.jpg); height:447px; line-height:20px; width:924px; }