/*margin*/
.mt10 {margin-top:10px;}
.mt20 {margin-top:20px;}
.mt30 {margin-top:30px;}
.mt40 {margin-top:40px;}
.mt50 {margin-top:50px;}
.mt60 {margin-top:60px;}
.mb0 {margin-bottom:0px;}
.mb10 {margin-bottom:10px;}
.mb20 {margin-bottom:20px;}
.mb30 {margin-bottom:30px;}
.mb40 {margin-bottom:40px;}
.mr10 {margin-right:10px;}
.mr20 {margin-right:20px;}
.mr30 {margin-right:30px;}
.mr40 {margin-right:40px;}
.ml10 {margin-left:10px;}
.ml20 {margin-left:20px;}
.ml30 {margin-left:30px;}
.ml40 {margin-left:40px;}



/*color*/
.c_bk {color:#000;}
.c_wh {color:#FFF;}

/*font-size*/
.f15 {font-size:15px;}
.f20 {font-size:20px;}
.f25 {font-size:25px;}
.f30 {font-size:30px;}
.f40 {font-size:40px;}
.f60 {font-size:60px;}