What is Polymesh built on?

Could you elaborate on the underlying infrastructure that Polymesh is constructed upon? I'm particularly interested in understanding the technological foundations that support its functionality. Is it based on a traditional blockchain architecture? Or does it employ a unique approach that sets it apart from other platforms? Additionally, are there any specific features or components that are integral to the Polymesh ecosystem and contribute to its overall efficiency and scalability? I'd appreciate a concise yet comprehensive description of the technological backbone that powers Polymesh.