#main {margin:0 auto; width:950px; text-align:left;}


.col_1, .col_2, .col_3, .col_box_1, .col_box_2{ float:left;}

#header, #content, #footer {width:950px}


/*======= index-2.html =======*/
#page3 #content .col_1{width:720px; margin-top:40px;}
#page3 #content .col_2{width:230px; margin-top:40px;}
/*=========================*/