树木切面精美年轮

An ultra-detailed macro photograph of perfectly concentric tree rings as a minimalist UI background. Smooth wood texture in soft natural tones (beige/amber/ash), radiating from a crisp central core. Seamless gradient transitions between growth layers, enhanced by subtle ambient lighting that creates depth. Hyper-realistic wood grain patterns with zero imperfections, cracks or knots. Top-down perspective with shallow depth of field, rendered in 4K resolution for digital background use