平台原始字段（来自 API 响应或 CSV 导入）：
{
"add_time": "2025-03-07 10:33:18",
"barcode": "",
"biz_type": 1,
"cates": [
{
"cate_id": 0
}
],
"chain_store_sync": false,
"cost_price": "",
"fx": 0,
"fx_fee_rate": "0.0",
"h5Url": "https://weidian.com/item.html?itemID=7411127383",
"imgs": [
"https://si.geilicdn.com/pcdecorate1790250396-10d1000001956e7c8abd0a21146b_1000_1413.jpg?w=480&h=480&cp=1"
],
"istop": 0,
"item_desc": "【漫农语侬】漫享生活礼（春）购买即可免费体验田间非遗活动DIY掐丝珐琅（参加活动扫描海报二维码报名咨询）",
"item_name": "【漫农语侬】漫享生活礼（春）购买即可免费体验田间非遗活动DIY掐丝珐琅（参加活动扫描海报二维码报名咨询）",
"itemid": "7411127383",
"merchant_code": "",
"price": "128.00",
"self_create": true,
"seller_id": "1867168977",
"skus": [],
"sold": 7,
"status": 2,
"stock": 93,
"thumb_imgs": [
"https://si.geilicdn.com/pcdecorate1790250396-10d1000001956e7c8abd0a21146b_1000_1413.jpg?w=110&h=110&cp=1"
],
"tiaohuo_item": false,
"update_time": "2025-04-29 11:01:21"
}