```json
{
"summary

```json
{
"summary": "优化后的JSON结构保持了原有布局构建器的核心功能，针对前端开发者群体调整了表述方式，加入更专业的技术参数说明，同时确保与原始数据结构完全兼容。",
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"bgClasses": "bg-fill-width",
"overlay": "",
"classes": "",
"id": "",
"bg": {
"img": {
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"classes": "object-fit",
"alt": ""
},
"classes": "bg-fill-width",
"overlay": ""
},
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"vertical": "center",
"animate": {
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},
"trigger": {
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"onLeave": "none",
"onEnterBack": "none",
"onLeaveBack": "none",
"start": "top 90%",
"end": "top 40%"
}
},
"type": "layout-builder",
"elements": [
{
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"sm": 12,
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"lg": 6
},
"horizontal": "start",
"vertical": "stretch",
"gap": {
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},
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"classes": "object-fit"
},
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},
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"style": {
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},
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},
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"onEnterBack": "none",
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"start": "top 90%",
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}
},
"layoutAlign": "start start",
"elements": []
},
{
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},
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},
"bg": {
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},
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"classes": "bg-fill-width"
},
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},
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}
},
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}
]
}
}
```