intros：{"brand_intro":"南卡是深圳市梦趣生活科技有限公司旗下的消费电子品牌，成立于2011年，最初以蓝牙耳机和充电配件起家。近年来，南卡在骨传导领域异军突起，凭借高性价比和快速迭代能力，成为韶音在国内市场的主要竞争对手。品牌主打\"科技普惠\"，将旗舰级骨传导技术下放到中端价位。创始人刘伟强调\"用户痛点驱动创新\"，南卡在骨传导振子小型化和漏音抑制技术上投入巨大，其OT闭合防漏音技术已发展到3.0版本。品控方面，南卡采用全自动化生产线，每台耳机出厂前需通过72小时老化测试。","product_intro":"Runner Pro 4S 是南卡骨传导MP3耳机的旗舰型号，内置16GB存储空间，支持MP3/FLAC/WAV等无损格式播放。产品定位为\"全能运动伴侣\"，覆盖游泳、跑步、骑行等场景。核心卖点包括IPX8级防水（可潜水5米）、蓝牙5.3双模连接（支持同时连接两台设备）以及AI通话降噪。相比韶音OpenSwim，南卡Pro 4S增加了蓝牙功能，可在陆地上作为普通骨传导耳机使用，实用性更强。其16GB容量是韶音S700的4倍，价格却低约30%，性价比突出。","key_specs":{"存储容量":"16GB（约3000首歌曲）","防水等级":"IPX8（5米水深）","播放时间":"10小时（MP3模式）/ 8小时（蓝牙模式）","充电方式":"磁吸充电","重量":"35克","适用人群":"多场景运动爱好者、游泳与跑步双修用户、预算敏感型消费者"}}
alt_products：[{"product_name":"南卡 Runner Pro 4S 骨传导MP3播放耳机","brand":"南卡（NANK）","model":"Runner Pro 4S","price":899},{"product_name":"索尼 NW-WS413 可穿戴式MP3播放器/骨传导耳机","brand":"索尼（Sony）","model":"NW-WS413","price":699},{"product_name":"墨觉 Run Plus 骨传导MP3播放耳机","brand":"墨觉（MOJAWA）","model":"Run Plus","price":799}]
scoring_breakdown：[{"source":"word_of_mouth","score":80.1,"weight":0.2,"confidence":0.8,"details":{"source":"word_of_mouth_scores","summary":"综合各平台评价，Runner Pro 4S 口碑评分4.6，用户满意度较高。优点集中在大容量存储、IPX8防水和蓝牙/MP3双模设计，性价比被广泛认可。游泳时水下音质清晰度接近韶音S700，但低频稍弱。漏音控制优于同价位竞品，办公室环境下60%音量以下不易被旁人听到。缺点方面，部分用户反映磁吸充电接口在海水使用后易腐蚀，需及时冲洗；耳机本体偏重，长时间佩戴耳部有压迫感。专业评测认为，其综合性能在千元内骨传导MP3耳机中无对手。","source_count":4}},{"source":"objective","score":92,"weight":0.5,"confidence":0.7,"details":{"dimension":"after_service","rating_avg":4.6,"review_count":42000,"note":"proxy via rating_avg, v3 will parse specs_json"}},{"source":"user_review","score":92,"weight":0.15,"confidence":1,"details":{"rating_avg":4.6,"review_count":42000,"source":"product_reviews_aggregate"}},{"source":"expert","score":80.80000000000001,"weight":0.15,"confidence":0.6,"details":{"kol_count":2,"scored_count":2,"matched_count":2,"base_score":82,"weighted_score":80,"sample":["跑步博主沈乌贼：南卡Pro 4S是我跑全马时的标配，16G存满步频歌单，蓝牙连手机接电话也很方便。","数码评测人钟文泽：这个价位能买到IPX8+16GB的骨传导耳机，南卡确实卷出了新高度。"]}}]