.rtop,.rbottom{display:block}
.rtop *,.rbottom *{display:block;height: 1px;overflow: hidden}
.r1{margin: 0 6px}
.r2{margin: 0 3px}
.r3{margin: 0 2px}
.r4{margin: 0 0;height: 18px}

.rs1{margin: 0 2px}
.rs2{margin: 0 1px}