.rtop,.rbottom{display:block; z-index:0}
.rtop *,.rbottom *{display:block;height: 1px;overflow: hidden; z-index:0}
.r1{margin: 0 5px; z-index:0}
.r2{margin: 0 3px; z-index:0}
.r3{margin: 0 2px; z-index:0}
.r4{margin: 0 1px;height: 2px; z-index:0}

.rs1{margin: 0 2px; z-index:0}
.rs2{margin: 0 1px; z-index:0}