Enchanted Forest Portal Banner

Create a cinematic wide promotional banner for {argument name="product name" default="GPT Image 2"} set in a dark enchanted forest at night. The scene shows one massive ancient tree trunk on the right with a hollow opening transformed into one glowing circular orange portal; through the portal is a misty blue mountain valley under stormy clouds. Surround the portal with warm sparks and amber rim light reflecting on twisted roots, wet stones, moss, and the forest floor. The left side should remain darker with tall tree silhouettes, blue fog, and negative space for typography. Add exactly 2 visible text elements in the lower-left corner: a large white headline reading “{argument name="headline text" default="GPT Image 2"}” and a smaller white subtitle below reading “{argument name="subtitle text" default="Now on Blyth AI"}”. Use a 16:9 landscape canvas, high-contrast teal-and-orange color grading, photorealistic fantasy environment, volumetric mist, shallow depth of field, dramatic cinematic lighting, crisp readable typography, no extra logos, no watermark, and no additional text.