style(CompetitiveAnalysisCard): 移除卡片边框

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/views/Company/components/CompanyOverview/DeepAnalysisTab/components/CompetitiveAnalysisCard.tsx

@@ -42,8 +42,6 @@ import type { ComprehensiveData, CompetitivePosition } from '../types';
 // 样式常量 - 避免每次渲染创建新对象
 const CARD_STYLES = {
   bg: 'transparent',
-  border: '1px solid',
-  borderColor: 'yellow.600',
   shadow: 'md',
 } as const;