.mainbox{width:1100px; background:#fff; box-shadow:5px 6px 6px #ddd,-5px 0px 4px #ddd; padding:10px 0; margin:0 auto; margin-bottom:40px;}
.main{padding:0 10px;}
#main_left{width: 265px;float: left;margin: 5px;}
#mainright{width: 780px;float: right;margin: 5px 0 0 5px;}
#tonglan1,#tonglan3{width:85%;overflow:hidden;margin:0 auto;}
#tonglan,#tonglan2,#tonglan4,#tonglan5,#tonglan6,#tonglan5,#tonglan6,#tonglan7,#tonglan8,#tonglan9,#tonglan10,#tonglan11,#tonglan12{width:98%;overflow:hidden;margin:0 auto;}