Check and fix:
- Does the keyboard work? — Tab through one by one; all buttons can be operated with the keyboard
- Can screen readers read it? — Images have text descriptions, forms have labels
- Are the colors clearly visible? — Is the contrast between text and background sufficient
- Is the focus correct? — When a popup opens, focus is locked inside it; when it closes, focus returns to its original position
After fixing, tell the user: "Accessibility optimization done. Now you can browse the entire website using the Tab key on the keyboard, screen readers can correctly read out the content, and the color contrast has also been adjusted—users with poor eyesight can see clearly too."