史诗奇幻机甲轻小说封面

Create a dramatic Japanese light-novel cover illustration for a fantasy mecha isekai story. Vertical poster composition with a huge heroic humanoid robot dominating the center foreground, viewed from a slightly low angle to make it monumental. The robot is sleek and ornate, with white and silver armor, rich gold trim, glowing cyan energy lines, a radiant emerald-green core in the chest, a crown-like crest on the helmet, and a long royal blue cape with gold edging. Behind its back spread multiple crystalline energy wings, about 8 large translucent green shards fanning out symmetrically like luminous blades. In its left hand it holds a long fantasy-tech spear with a blue glowing blade and gold mechanical detailing. At the robot’s feet are 2 human characters: on the left, a red-haired fantasy heroine with very long braided hair, leather-and-fabric adventurer clothing, and a determined expression, looking up at the robot; on the right, a young male protagonist with short dark hair in a fantasy tunic and cloak, reaching one hand up toward the giant machine in awe and urgency, seen mostly from behind. The setting is an epic ruined sci-fi fantasy world with towering gothic spires, broken city structures, drifting smoke, dramatic clouds, and a sky filled with stars, planets, streaks of lightning, and 8 small flying warships scattered in the distance. Highly polished anime key visual style, ultra-detailed, cinematic lighting, intense contrast, blue-green-gold color palette, heroic atmosphere, intricate mechanical rendering, fantasy worldbuilding, premium game or novel cover finish. Add large Japanese title typography at the top: 《{argument name="tagline text" default="本格異世界SFロボット戦記"}》 above a massive metallic logo reading {argument name="series title" default="ASTRAIA"}, with a smaller Japanese subtitle line beneath it. Add a large dramatic Japanese catchphrase at the bottom in glowing white and gold text over 2 lines: {argument name="bottom catchphrase" default="乗って！ユウキ！ その叫びが、世界の運命を決めた！"}. Keep the overall design dense, premium, and readable as a commercial cover, with the central robot as the unmistakable focal point.

创作一张极具戏剧性的日式轻小说封面插画，主题为奇幻机甲异世界故事。采用竖版海报构图，画面中心前景由一台巨大的英雄式人形机器人占据，采用略微仰视的视角，彰显其宏伟感。机器人造型流畅且华丽，身披白银色装甲，饰有丰富的金色镶边，流淌着青色能量线条，胸口镶嵌着璀璨的翡翠绿核心，头盔上带有皇冠状饰物，背部垂下一条镶金边的皇家蓝长披风。其身后展开多片晶体能量翼，约 8 片巨大的半透明绿色碎片如发光刀刃般对称扇形排开。左手持有一柄长款奇幻科技长枪，枪刃散发着蓝色光芒，并带有金色机械细节。机器人脚下站着 2 位人类角色：左侧是一位红发奇幻女主角，留着极长的辫子，身穿皮革与布料拼接的冒险者服装，神情坚定，正仰望着机器人；右侧是一位短发黑发的年轻男主角，身穿奇幻束腰外衣和斗篷，正满怀敬畏与急切地向巨型机甲伸出一只手，主要以背影示人。背景设定为一个史诗般的废墟科幻奇幻世界，耸立着哥特式尖塔，建筑残骸遍布，烟雾缭绕，云层壮观，天空中点缀着繁星、行星、闪电轨迹，远处散布着 8 艘小型飞行战舰。采用高精度的动漫主视觉风格，细节极致，电影级光影，对比强烈，采用蓝、绿、金配色，氛围英雄气概十足，机械渲染细腻，充满奇幻世界观，呈现出高级游戏或小说封面的质感。在顶部添加醒目的日文标题排版：在巨大的金属质感 Logo {argument name="series title" default="ASTRAIA"} 上方添加《{argument name="tagline text" default="本格異世界SFロボット戦記"}》，下方配有一行较小的日文副标题。在底部添加一行醒目且充满戏剧性的日文宣传语，以发光的白金字体分 2 行显示：{argument name="bottom catchphrase" default="乗って！ユウキ！ その叫びが、世界の運命を決めた！"}。整体设计保持紧凑、高级且易读，符合商业封面标准，并确保中央机器人成为绝对的视觉焦点。