scoring_breakdown:[{"source":"word_of_mouth","score":73.5,"weight":0.5,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"美源发采在京东和天猫累计评价超12万条,口碑两极分化。优点:1)上色速度极快,10分钟即可遮盖白发,适合应急;2)价格低廉,单次成本约15-20元;3)操作简单,无需专业技巧。缺点:1)气味浓烈,氨味明显,部分用户反馈染后头晕;2)染后发质干涩,需配合护发素使用;3)色号单一,自然黑容易染出\"假黑\"效果,不够自然。专业评测(如消费者报道)指出其含氨量较高,不建议敏感头皮长期使用。小红书用户评价多为\"便宜但伤发\",适合偶尔使用或对发质要求不高者。","source_count":4}},{"source":"objective","score":86,"weight":0.1,"confidence":0.7,"details":{"dimension":"safety","rating_avg":4.3,"review_count":120000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":86,"weight":0.25,"confidence":1,"details":{"rating_avg":4.3,"review_count":120000,"source":"product_reviews_aggregate"}},{"source":"expert","score":80.80000000000001,"weight":0.15,"confidence":0.4,"details":{"kol_count":2,"scored_count":2,"matched_count":0,"base_score":82,"weighted_score":80,"sample":[{"source":"B站UP主@染发老司机","quote":"美源发采是速度之王,但味道也是王者级别,建议在通风处使用。"},{"source":"小红书博主@省钱小能手","quote":"十几块钱就能遮白发,还要什么自行车?但记得染后一定要用护发素。"}]}}]