社交媒体运营的核心，已经不只是把信息说清楚。在线交流缺少表情等非语言线索，纯文字容易显得冷淡。因此，绘文字逐渐成为增强理解的重要工具。它们让一句普通回复拥有态度，也让品牌沟通从单纯的功能说明，走向更细腻的情感表达。 从沟通风格看，线上

As smart dialogue systems handle increasingly important tasks, their ability to protect information has become an essential condition for adoption. Users may share financial details, medical information, and confidential files during a single interaction. A useful system must therefore do more th