当流量增长的天花板逐渐见顶，抖音或许也意识到：仅靠短视频已难以支撑其下一阶段的扩张。它必须在既有体系之外，寻找新的内容形态，补上长期缺失的那块拼图。
// 将当前元素的「下一个更大值」存入Map
。体育直播是该领域的重要参考
c14n: Fix type confusion
Robot vacuums are one of the greatest inventions in recent history, and they just keep getting better. Most models these days have self-emptying capacities, smart functions that avoid obstacles, and even pet hair stands no chance against these advanced machines.
当配置变更（Config 对象引用变化）时，WeakMap 的键失效，缓存自动失效。不需要显式清除——这是 WeakMap 的自动 GC 特性，优雅地解决了缓存失效问题。