light 对应font-weight值为100~300,
regular对应font-weight值为400,
medium对应font-weight值为500,
bold一般对应600或700,
black对应font-weight值为800,
ultrablack对应font-weight值为900
light 对应font-weight值为100~300,
regular对应font-weight值为400,
medium对应font-weight值为500,
bold一般对应600或700,
black对应font-weight值为800,
ultrablack对应font-weight值为900