Develop an education-oriented 3D interactive demonstration that fully presents the key steps of DNA replication. Users will explore a dark intracellular environment where key molecules are highlighted with fluorescent effects. When the demonstration reaches key checkpoints, users must click the correct molecules/sites to earn points, with feedback displayed in the UI. The camera will traverse along a double-helix path and support an orbit-style viewing mode toggle. Implement with Babylon.js, able to load fairly detailed molecular models (e.g., PDB and glTF), use step-by-step binding/separation animations to recreate pairing and polymerization processes, and provide a stable scoring system and a clean instructional UI.