// rank_tier = medal*10 + star (1=Herald…7=Divine, 8=Immortal)
// 每星步长:Herald~Ancient 每星=154,Divine 每星=200,Immortal ≥5620
band(rt): if rt==80 -> "5620+"
Divine: 4620+(star-1)*200 ~ 4620+star*200
其余: (med-1)*770+(star-1)*154 ~ (med-1)*770+star*154
// 例 rt=14 -> Herald 4 -> 462 – 616