Proliferation of digital interactions has underscored the critical need for robust, privacy-preserving, and secure identity management systems. Traditional centralized identity models, while prevalent, are increasingly vulnerable to data breaches and identity theft, and face an existential threat from the advent of quantum computing. This paper proposes a Quantum-Resilient Decentralized Identity (QR-DID) platform, an innovative framework that integrates Decentralized Identifiers (DIDs) with Post-Quantum Cryptography (PQC), blockchain technology, and AI-driven behavioral analytics. The QR-DID platform empowers users with self-sovereign control over their digital identities and verifiable credentials, ensuring long-term security against quantum attacks, enhancing privacy through selective disclosure, and providing adaptive, real-time threat detection. We detail the architectural design, the synergistic integration of these advanced technologies, and the end-to-end operational flow, demonstrating a pathway to a more secure, private, and resilient digital trust ecosystem.