Act as a product designer with 5+ years of experience in ergonomic tech accessories. Design a sleek, minimalist phone stand with adjustable angles (15° to 75°) for optimal viewing. Use [MATERIAL: aluminum alloy] for durability, [COLOR: matte black] for a premium look, and include [FEATURE: non-slip silicone pads] to secure devices. The stand should accommodate phones from [SIZE: 4.7 to 6.9 inches] and weigh under [WEIGHT: 200g]. Render the design in a high-end studio setting with soft lighting, showcasing its versatility for desks, nightstands, or travel. Highlight the seamless hinge mechanism and compact foldable design.