平台原始字段（来自 API 响应或 CSV 导入）：
{
"add_time": "2025-03-18 11:15:49",
"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=7426953637",
"imgs": [
"https://si.geilicdn.com/pcitem1790250396-13fd00000195a1f8706f0a2395d6_1080_721.jpg?w=480&h=480&cp=1"
],
"istop": 0,
"item_desc": "「漫四季」半日营活动三次卡（可多人使用）",
"item_name": "「漫四季」半日营活动三次卡（可多人使用）",
"itemid": "7426953637",
"merchant_code": "",
"price": "235.00",
"self_create": true,
"seller_id": "1867168977",
"skus": [],
"sold": 4,
"status": 1,
"stock": 196,
"thumb_imgs": [
"https://si.geilicdn.com/pcitem1790250396-13fd00000195a1f8706f0a2395d6_1080_721.jpg?w=110&h=110&cp=1"
],
"tiaohuo_item": false,
"update_time": "2025-03-18 11:58:35"
}