@default-space: {
top: 12;
bottom: 12;
left:12;
right:12;
};
.margin(@space,@index) when (@index>0){
@value:~'@{index}px';
.mg-@{space}-@{index}{
margin-@{space}:@value;
}
}
.padding(@space,@index) when (@index>0){
@value:~'@{index}px';
.pd-@{space}-@{index}{
padding-@{space}:@value;
}
}
each(@default-space, {
.margin(@key,@value);
.padding(@key,@value);
});











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