文本渲染控制模板和示例提示

```json
{
  "scene": "极简科技海报，带渐变背景",
  "text_elements": [
    {
      "text": "{argument name=\"headline text\" default=\"AI 革命 2025\"}",
      "position": "居中，上方三分之一处",
      "font_style": "粗体，未来感无衬线字体，发光效果",
      "size": "大标题"
    },
    {
      "text": "{argument name=\"subtitle text\" default=\"未来已来\"}",
      "position": "居中，下方三分之一处",
      "font_style": "优雅手写体，较小的副标题",
      "size": "较小的副标题"
    }
  ]
}
```

---

**Original English:**
{
  "scene": "minimalist tech poster with gradient background",
  "text_elements": [
    {
      "text": "{argument name="headline text" default="AI Revolution 2025"}",
      "position": "center, upper third",
      "font_style": "bold, futuristic sans-serif, glowing effect",
      "size": "large headline"
    },
    {
      "text": "{argument name="subtitle text" default="The future is now"}",
      "position": "center, lower third",
      "font_style": "elegant script, smaller subtitle"
    }
  ]
}