天气系统示意图

Create a polished meteorology infographic showing a mid-latitude cyclone system from a top-down synoptic view. Use a cool palette of ocean blue, cloud white, storm gray, crimson, and cobalt, with smooth contour lines and crisp symbols. Include pressure isobars, cloud bands, warm and cold fronts, arrows for wind direction, and rainfall zones. Add clear in-image text: "Mid-Latitude Cyclone", "Low Pressure 984 hPa", "Warm Front", "Cold Front", and "Occluded Front". Include city labels "Northport", "Elmside", and "Cedar Bay" for context, plus a legend reading "Rain", "Snow", and "Thunderstorm". Show temperature markers "8 C", "14 C", and "21 C" in different air masses. The composition should be educational and publication-ready, with sharp labels, clean hierarchy, accurate diagram conventions, and strong visual readability suitable for a textbook or science exhibit panel.