.col-1, .col-2, .col-3, .col-4{ float:left}
/*======= width =======*/
.main{margin:0 auto; text-align:left; width:780px; }

/*======= header =======*/
#header {height:103px;  background:url(images/top.jpg) no-repeat top center}

#content{ background:url(images/pmcearth.jpg); height:371px}
/*======= index-2.html =======*/
#page2 #content .col-1{ width:404px; border-right:1px solid #bdd0f0}
#page2 #content .col-2{ width:296px; border-left:1px solid #bdd0f0; margin-left:-1px; height:371px}
/*======= index-3.html =======*/
#page3 #content .col-1{ width:220px; border-right:1px solid #bdd0f0}
#page3 #content .col-2{ width:480px; border-left:1px solid #bdd0f0; margin-left:-1px; height:371px}
/*======= index-4.html =======*/
#page4 #content .col-1{ width:300px; margin-right:50px}
#page4 #content .col-2{ width:300px}
/*======= index-5.html =======*/
#page5 #content .col-1{ width:404px; border-right:1px solid #bdd0f0}
#page5 #content .col-2{ width:296px; border-left:1px solid #bdd0f0; margin-left:-1px; height:371px}
#page5 #content .col-3{ width:90px}
#page5 #content .col-4{ width:250px}


/*======= footer =======*/
#footer { height:326px; background:url(images/bot.jpg) no-repeat top }