关于罗马帝国的16:9横版现代几何矢量风格信息图海报，干净的平面矢量插画，带有 bold 几何形状、锐利边缘，调色板严格限制为深红、帝国金、黑…

modern geometric vector style infographic poster in 16:9 horizontal format about the Roman Empire, clean flat vector illustration with bold geometric shapes, sharp edges, and a strictly limited palette of deep red, imperial gold, black and ivory, central illustration rendered as an abstract geometric composition featuring the Colosseum, a laurel wreath, a legionary shield and a simplified map of Roman expansion across Europe and the Mediterranean, information organized into structured timeline bars, map fragments and compact fact panels, strong grid-based layout inspired by premium editorial infographics and modern data journalism, bold sans-serif typography, minimal decorative elements, flat color fills with no gradients, no textures, no photorealism, crisp and scalable vector aesthetic, highly legible and visually striking, high quality, aspect ratio 16:9