Ethereal Sunset Serenity

A highly realistic vertical beach portrait, 3:4 aspect ratio. An adult woman kneels in shallow seawater and wet sand at sunset, wearing a black thin-strap triangle bikini. Both the top and bottom are wet and close to the body, with small blue-black reflective highlights. She faces the camera from the front, kneeling with both knees in the shallow water, upper body slightly lifted, one hand supporting her from behind on the wet sand and water surface, shoulders relaxed, with a quiet paused posture.  She has deep black or dark brown-black medium-length wet hair, slightly separated by seawater and sea breeze, with one strand falling beside her face. Her makeup is natural and transparent, inspired by East Asian seaside fashion beauty: light base makeup, subtle eyeliner, soft under-eye detail, and nude-pink lips. Her expression is quiet and slightly absent-minded, eyes softly looking toward the camera, no obvious smile, as if caught for one second between the sea wind and the sunset.  Her skin tone is light warm ivory to natural fair, with visible skin on the face, neck, shoulders, collarbones, upper chest, arms, waist, abdomen, hip sides, thighs, and knees. The skin should look truly damp with seawater, as if it would feel cool, soft, smooth, and slightly sandy, with small water droplets remaining; avoid plastic airbrushed skin. The sunset shines from behind her head, creating strong backlight. A vertical golden reflection path stretches across the ocean behind her, and reflected water light softly fills the front of her body from below. Warm golden highlights appear along the shoulders, chest, arms, and thighs, while the front of the face and body remains softly gray, low-contrast, and slightly underexposed due to backlight.  The background is an evening shoreline with a golden-orange sea, white foam waves, shallow tidewater, reflective wet sand, and gentle distant waves. The image should feel like a real travel snapshot taken with a phone or compact camera, not a studio shoot. Keep slight grain, old digital camera texture, backlight flare, partially overexposed water highlights, and natural uneven exposure. The camera is slightly above chest-to-face height, looking down gently; the subject is centered slightly low in the frame, with the sun behind her head near the upper center. Moderate depth of field: the subject is relatively clear, while the distant waves are softly blurred. The overall mood is quiet, humid, warm, and emotionally residual, like the end of a day being taken away by the ocean.