Card Tech Draft (卡牌科技抽卡原型)

An experimental prototype that replaces the linear tech tree with a mining-triggered card draft: weighted odds and pity protection decide which technologies you're allowed to research next, while drill heat builds up alongside it and throttles how efficiently that mining converts into progress — deliberately paired with the draft, not meant to be balanced or modded separately. Tuned against Space Age progression; no full gameplay validation performed for either configuration.