Generate a comprehensive travel itinerary from Nanjing to Changchun, covering flights, accommodation, daily itineraries, attractions, and dining, presented in HTML. 来源：https://prompts.chat/prompts/cmjgtsjhr0001l204ykffrvs2
Builds a day-by-day jet lag plan from flight times and your usual sleep hours. Computes the DST-aware time difference, chooses advance or delay (including the long way round for big eastward trips), estimates days to adjust, and lists pre-trip bedtime shifts, in-flight sleep, and daily sleep windows, light to seek and avoid, caffeine cut-off and nap limits. Flags short trips. Includes a stdlib Python planner with --self-test. 来源：https://prompts.chat/prompts/cmvhsbqp7000nle08uvst5ots
Plans a day hike leg by leg. Estimates time with Naismith's rule and Langmuir's descent corrections, adjusted for terrain, fitness, pack weight and breaks, gives clock times for each leg, checks the finish against sunset and the latest safe start, and works out water to carry between refills and snacks to pack. Flags after-dark finishes, long dry stretches and hard terrain late in the day. Includes a stdlib Python planner with --self-test. 来源：https://prompts.chat/prompts/cmvoxmzkk0001jk08elffowri
