Tidal Fantasy Bay with Sea Arches and Ancient Watchtowers

Generate a high-quality original concept art of a coastal fantasy game scene with an ultra-wide horizontal aspect ratio of approximately 21:9. It adopts a semi-realistic cinematic painting style, with an overall bright and vast atmosphere. The main colors are sky blue, sea grayish blue, warm golden rock walls, moss green, and wetland brown, presenting a serene, ancient, and slightly mysterious coastal exploration atmosphere. No obvious game HUD is added. The scene is set in a White Cliff Bay after the tide has receded. The foreground is a wide intertidal zone, with the ground covered in moist silt, gravel, seagrass, puddles and shallow tidal ditches, and local water surfaces reflecting the sky and cliffs. The foreground on the left is a tall white sea-eroded cliff covered with green plants. The surface of the rock face has obvious weathered textures, longitudinal cracks, moss and hanging vines. The bottom is shaded by dark shrubs and shadows, enhancing the spatial layers. Three huge warm yellow sea-eroded rock columns are distributed in the medium and distant view. The top of the highest central rock platform is covered with grassland, low trees and the remains of an original ancient coastal watchtower, including a circular stone tower, broken walls, dilapidated watchtowers and narrow mountain paths. The building is small in scale and is designed to highlight the grandeur of the cliff. On the right, two independent rock columns rise from the shallow sea. The farthest one forms a huge natural arch. The arch hole runs through the rock mass, and through the opening, one can see the distant sea and sky. The rock face, illuminated by the setting sun, presents a soft golden highlight, while the backlit area retains a cold grey shadow. In the middle of the bay, there is a simple tidal fishing ground, composed of a large number of slender wooden stakes, rope nets, bamboo frames and floating markers, extending along the shallow water area to the distance. Several original wooden fishing boats were moored in the shallowly area, and one of them, carrying three fishermen, slowly approached the shore. Several original coastal residents in coarse cloaks and waterproof boots were arranged along the shore. Some were carrying fishing nets, some were leading small pack animals, and some were checking the fishing tools in the tidal ditch. The characters are kept in a small proportion and their movements are natural, which is used to enhance the scale of the environment and the sense of daily life. The sky is vast, with large areas of pale blue and off-white clouds spreading out in a conceptual painting style. A flock of white seabirds fly by in the upper left corner. The light comes from the warm sunlight on the lower right side, creating golden reflections on the rock walls, grass and shallow water surfaces, while the tidal flat shadows maintain a cool bluish-gray tone. The distant view incorporates a light sea fog, air perspective and soft halos, gradually fading the rock columns layer by layer and enhancing the depth. Overall, it emphasizes vast sea-eroded landforms, natural stone arches, white cliffs, tidal wetlands, ancient watchtowers, fishing boat stakes, coastal residents' activities, soft volumetric light and epic environmental scales. The composition guides the line of sight through the tidal flats and fishing boats from the shaded cliff on the left, and finally lands on the natural arch and the open sea on the right. The scene resembles the coastal area concept design of a high-budget original fantasy open-world game.