Ethereal Fantasy Portrait with Swans and Golden Hour Light

A highly detailed prompt for generating an ethereal, photorealistic fantasy portrait of a young woman in an elaborate ivory lace ballgown, lying on grass by a dark pond. It emphasizes delicate porcelain skin, long platinum blonde hair spread out like a halo, and a serene pose, surrounded by white swans in soft golden hour light, inspired by Pre-Raphaelite romanticism.