Epic Fantasy Mecha Light Novel Cover

Create a highly dramatic Japanese light novel cover illustration themed around a fantasy mecha isekai story. The poster will be in a vertical format, with a massive, heroic humanoid robot dominating the foreground from a slightly upward angle to emphasize its grandeur. The robot's design is sleek and ornate, clad in silver armor with rich gold trim, flowing blue energy lines, a dazzling emerald core embedded in its chest, a crown-like ornament on its helmet, and a long, royal blue cape with gold trim draped down its back. Behind it unfolds multiple crystalline energy wings, approximately eight large, translucent green fragments arranged symmetrically in a fan shape like glowing blades. In its left hand, it holds a long, fantastical technological spear with a blue-glowing blade adorned with gold mechanical details. Two human characters stand at the robot's feet: on the left is a red-haired fantasy heroine with extremely long braids, dressed in an adventurer's outfit made of leather and fabric, her expression resolute as she gazes up at the robot; on the right is a short-haired, dark-haired young male protagonist, wearing a fantasy tunic and cloak, extending a hand towards the giant mech with awe and eagerness, primarily shown from behind. The background is set in an epic, ruined sci-fi fantasy world, with towering Gothic spires, scattered architectural ruins, swirling smoke, spectacular clouds, and the sky dotted with stars, planets, and lightning trails, with eight small flying warships scattered in the distance. It employs a high-precision anime-style visual style, with exquisite details, cinematic lighting and strong contrasts, using a blue, green, and gold color scheme, creating a heroic atmosphere, with delicate mechanical rendering, full of fantasy worldview, presenting the quality of a high-end game or novel cover. A striking Japanese title is added at the top: a large metallic logo.{argument name="series title" default="ASTRAIA"} Add above{argument name="tagline text" default="A full-fledged other-world sci-fi robot war chronicle"} Below this is a smaller Japanese subtitle. At the bottom, a striking and dramatic Japanese tagline is displayed in two lines in a glowing platinum font:{argument name="bottom catchphrase" default="Get on! Yuuki! That cry determined the fate of the world!"} The overall design remains compact, sophisticated, and easy to read, meeting business cover standards and ensuring the central robot becomes the absolute visual focus.