.rtop, .rbottom {
    display: block
    }
.rtop *, .rbottom * {
    display: block;
    height: 1px;
    overflow: hidden
    }
.r1 {
    margin: 0 5px
    }
.r2 {
    margin: 0 3px
    }
.r3 {
    margin: 0 2px
    }
.r4 {
    margin: 0 1px;
    height: 0
    }
.rs1 {
    margin: 0 2px
    }
.rs2 {
    margin: 0 1px
    }