Is Sui built on Ethereum?

Excuse me, could you please clarify if Sui is indeed a project that has been developed on top of the Ethereum blockchain? I'm curious to know if Sui leverages the security, decentralization, and smart contract capabilities of Ethereum, or if it has pursued an entirely different approach to building its blockchain platform. Understanding this would greatly aid in assessing Sui's unique selling points and how it fits into the broader cryptocurrency and finance landscape. Thank you for your time.