.main{width:890px; margin:0 auto; text-align:left;}

/*=========page_1===========*/
#page_1 .col_1{width:271px;}
#page_1 .mid{width:42px;}
#page_1 .col_2{width:502px;}
/*========//page_1===========*/

/*=========page_2===========*/
#page_2 .col_1{width:502px;}
#page_2 .mid{width:42px;}
#page_2 .col_2{width:272px;}
/*========//page_2===========*/

/*=========page_3===========*/
#page_3 .col_1{width:271px;}
#page_3 .mid{width:44px;}
#page_3 .col_2{width:499px;}
/*========//page_3===========*/

/*=========page_4===========*/
#page_4 .col_1{width:271px;}
#page_4 .mid{width:44px;}
#page_4 .col_2{width:499px;}
/*========//page_4===========*/