@alifd/next/lib/cascader/rtl.scss

#{$cascader-prefix}[dir="rtl"] {
    #{$cascader-prefix} {
        &-menu-wrapper {
            float: right;
            border-left: none;
            border-right: $cascader-menu-border;
            &:first-child {
                border-right: none;
            }
        }

        &-menu {
            &.#{$css-prefix}has-right-border {
                border-right: none;
                border-left: $cascader-menu-border;
            }

            &-icon-right {
                right: auto;
                left: 10px;
            }
        }
    }
}