规划和优化网站SEO关键词布局，检测关键词冲突，审查页面优化质量。Use when planning keyword strategy, diagnosing ranking issues, analyzing SERP competition, or when the user mentions "keyword conflicts", "internal competition", "keyword cannibalization", "page ranking problems", "keyword density", "SEO audit", or asks "why my pages don't rank", "how to distribute keywords", "which keywords for this page", "keyword layout strategy". 核心原则:一个页面一个主关键词+2-5个次要关键词。提供CSV检测脚本、布局模板和完整工作流程。