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Create one HTML file for a luxury smartwatch page using Three.js, Anime.js, and Tailwind. Make a 3D watch model, a dark textured overlay with a round hole showing the watch on beige, and animate the header and big numbers to slide in when the page loads.

Make the page more professional. Replace the static hole with an iris that opens on load. Add a glass dome over the watch face with reflections, improve metal materials, add mouse parallax so the watch rotates with the cursor, and draw time and fitness rings on the watch face.

Turn the single screen into a multi-section scroll site. When the user scrolls, animate the 3D watch to move and rotate to match each section. Keep the 3D canvas and background fixed while text scrolls over them; only the watch moves.

- fixed canvas: position the canvas