.tail-top{ background:url(../images/bg1.jpg) top repeat-x}

.col-1, .col-2, .col-3, .col-4{ float:left}
/*======= width =======*/
#main {	margin: 0 auto;	position: relative;	width: 980px; }

/*======= header =======*/
header {height:486px;  background:url(../images/top.jpg) top center no-repeat}