Create a serene and vibrant cartoon illustration of a river flowing through a dense jungle at sunrise. The river should reflect the warm, golden hues of the rising sun, with gentle ripples on the surface. The jungle should be lush and full of life, with tall trees, thick foliage, and various plants along the riverbanks. The sky should feature soft gradients of orange, pink, and yellow as the sun begins to rise above the horizon. The overall atmosphere should feel peaceful and natural, capturing the beauty of the jungle at dawn.