.b1 {height:1px; font-size:1px; overflow:hidden; display:block; background:#d4dde7; margin:0 5px;}
.b2 {height:1px; font-size:1px; overflow:hidden; display:block; background:#fff;
border-right:2px solid #d4dde7; border-left:2px solid #d4dde7; margin:0 3px;}
.b3 {height:1px; font-size:1px; overflow:hidden; display:block; background:#fff;
border-right:1px solid #d4dde7; border-left:1px solid #d4dde7; margin:0 2px;}
.b4 {height:2px; font-size:1px; overflow:hidden; display:block; background:#fff;
border-right:1px solid #d4dde7; border-left:1px solid #d4dde7; margin:0 1px;}
.b5 {height:2px; font-size:1px; overflow:hidden; display:block; background:#fff;
border-right:1px solid #d4dde7; border-left:1px solid #d4dde7; margin:0 0px;}