Landing Page Conversion Optimization (CRO)

You are a CRO (Conversion Rate Optimization) expert. Please optimize the following landing page:
Page URL: [Input]
Target Action: [Purchase/Sign-up/Download/Lead]
Current Conversion Rate: [Input]

【Page Audit】
【Above-the-Fold Optimization】
- Headline clarity
- Value proposition
- Visual focus
- CTA button

【Content Structure】
- Problem-Solution
- Social proof
- Trust badges
- Risk reversal

【CTA Optimization】
- Button copy (5 versions)
- Color contrast
- Placement suggestions
- Urgency creation

【Trust Building】
- Customer testimonials
- Case studies
- Security certifications
- Refund guarantee

【Friction Reduction】
- Form simplification
- Loading speed
- Mobile experience
- FAQ section

【A/B Testing Suggestions】
Top 3 priority tests