scoring_breakdown:[{"source":"word_of_mouth","score":88.6,"weight":0.25,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"京东好评率97%,评论超31万条,用户称赞\"性价比无敌\"和\"续航惊人\"。专业评测(如\"耳机大家坛\")认为W820NB在300元价位降噪表现超出预期,但音质细节和声场不如高端产品。徒步场景中,用户反馈\"戴一天都不累,续航够用一周\"。缺点:头梁塑料感较强,长时间使用可能有轻微异响;无防水设计,下雨天需注意。小红书博主\"穷游的阿杰\"说:\"徒步旅行必备,便宜耐造,丢了也不心疼。\"适合预算敏感、追求实用性的用户。","source_count":4}},{"source":"objective","score":92,"weight":0.35,"confidence":0.7,"details":{"dimension":"battery","rating_avg":4.6,"review_count":310000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":92,"weight":0.3,"confidence":1,"details":{"rating_avg":4.6,"review_count":310000,"source":"product_reviews_aggregate"}},{"source":"expert","score":82,"weight":0.1,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"sample":["\"300块能买到这样的降噪和续航,漫步者真的是良心国货。\"——数码博主@科技美学","\"徒步时戴它,从日出听到日落,还有电。\"——小红书博主@徒步小王子"]}}]