Create a surreal portrait of a woman with her head gracefully tilted back against a pristine white background. Her hair cascades in exaggerated, fluid lines, and her features are artistically enhanced, capturing a sense of dreamlike elegance. The woman's skin has a luminous glow, enhancing her ethereal presence. Use a palette of soft pastel shades to envelop the scene in a serene, otherworldly atmosphere. The portrait should exhibit photorealistic qualities, rendered in 4K UHD, with intricate detailing that captures the raw beauty of the composition.