Generate a highly detailed HD image of a fantastical, densely packed 19th-century retrofuturistic steampunk city at twilight. Depict a dazzling sky with moon and stars against deep blacks and navy blues, contrasted by vibrant yellows, pinks, purples, and reds. Include intricate mechanical details, towering whimsical buildings, city clocks, families shopping, ducks in a moonlit pond, human silhouettes in the windows, and cats in alleyways. Use an alcohol ink style for a whimsical, surreal, and mesmerizing effect.