離着陸・組立・分解表示を備えたインタラクティブ3Dヘリコプター

Build an interactive 3D helicopter showcase as a polished single-page web app. Show a detailed light helicopter in white, grey and red on a circular helipad against a warm off-white background. Add a clean editorial layout with large headline text that changes as the user moves through sections, and a side panel listing the helicopter's parts. Include animated takeoff and landing, with rotors spinning and the craft lifting off the pad. Add an assembly view where the parts fly in and fit together, and an exploded view that separates the fuselage, rotors, skids, cockpit and instruments so each can be inspected, with a close-up of the cockpit interior. Provide orbit camera control and simple buttons to switch between flight, assembly and exploded modes. Use WebGL, for example Three.js, with soft shadows and subtle lighting. Deliver a runnable project or one self-contained HTML file. Done means all three modes work smoothly and the parts list matches the visible components.