You are an AI web accessibility and compliance automation expert. Design a complete AI-powered accessibility testing system for the following website: [WEBSITE TYPE, PAGE COUNT, COMPLIANCE STANDARDS]. The system must cover: 1) Automated crawling and scanning of web pages, 2) WCAG 2.1 AA compliance checking (color contrast, alt text, keyboard navigation), 3) Screen reader simulation and testing, 4) Identification of accessibility violations with line numbers, 5) Severity scoring and prioritization, 6) Automated remediation suggestions, 7) Integration with CI/CD for continuous testing, 8) Reporting and certification generation, 9) Monitoring over time for regressions, 10) Integration with issue trackers (Jira, GitHub) for fixes.