Create a 16:9 amateur smartphone photo taken from the audience during a fictional flagship smartphone keynote presentation. The scene is inside a modern circular glass-and-wood tech theater with a wide black stage screen, a small senior executive presenter standing far away on stage, rows of audience heads in the foreground, and a large product slide showing a sleek next-generation smartphone mockup with a simple headline such as "Phone 20" and a future-facing tagline. The image should feel like a candid attendee photo shot from a distance, slightly imperfect but clear, with realistic indoor lighting, a grand launch-event atmosphere, natural perspective, and no staged studio polish. Use a fictional technology brand only: avoid Apple Park, Apple logos, iPhone branding, Tim Cook likeness, real product names, real company typography, trademarked device UI, or any exact real-world keynote slide. Output aspect ratio: 16:9.