@margins-set: {
    mgt: margin-top;
    mgb: margin-bottom;
    mgl: margin-left;
    mgr: margin-right;
    mg: margin;
};

@paddings-set: {
    pdt: padding-top;
    pdb: padding-bottom;
    pdl: padding-left;
    pdr: padding-right;
    pd: padding;
};

@steps: range(2, 48, 2);

each(@steps, {

    each(@margins-set, .(@mv, @mk, @mi) {
        .@{mk}_@{value} {
            @{mv}: (@value * 1px)
        }
    })
    each(@paddings-set, .(@pv, @pk, @pi) {
        .@{pk}_@{value} {
            @{pv}: (@value * 1px)
        }
    })
});
// 动态生成12~22单位，步长为1的font-size
each(range(12, 28, 1), {
    .fs_@{value} {
        font-size: (@value * 1px);
    }
});