Know the Mountain Before the Mountain Knows You 进山之前，先读懂山
22 free, offline-ready safety tools for mountain microclimate, thunderstorms, flash floods, fire danger, UV, altitude cold and trip planning — no sign-up, works with no signal. 22 个免费、可离线使用的安全工具：山地微气候、雷暴、山洪、火险、紫外线、高海拔低温与行程规划——无需注册，无信号也能用。
Private & offline 隐私保护，可离线
No tracking pixels and no external API calls. Every calculation runs on your own device; only your language choice and starred tools are kept in this browser's localStorage. 无追踪代码，也不调用任何外部 API。所有计算都在你的设备上完成；仅语言偏好与星标收藏保存在当前浏览器的 localStorage 中。
Free forever — all 22 tools 永久免费——22 个工具
Every calculator is free with unlimited use today: no trial, no paywall, no sign-up. A membership may be added later, but the current 22 tools stay free. 当前每个计算器都免费且无限次使用：无试用期、无付费墙、无需注册。未来或增加会员，但现有 22 个工具会一直免费。