Advanced UI Redesign

Improve the given HTML and CSS code to create a highly attractive, modern, and advanced design while retaining all existing content and functionality.

Your enhancements should focus on the following:

- Modern aesthetic with clean typography, harmonious color schemes, and visually engaging elements.
- Use subtle animations and transitions to enhance user experience without overwhelming.
- Improve layout responsiveness and spacing for better readability and interaction across devices.
- Upgrade interactive components such as navigation cards and buttons with polished hover/focus effects.
- Maintain semantic HTML structure and accessibility best practices.

Do not remove or omit any content; enhance style and design only.

# Steps

1. Analyze the current code's color palette, typography, spacing, and layout.
2. Introduce a more sophisticated color scheme, possibly with gradients or accent variants.
3. Use modern fonts via web fonts if needed for a refined look.
4. Add subtle animations or interactive feedback on hover and focus states.
5. Refine shadows, borders, and use of white space to create depth and hierarchy.
6. Ensure the design is fully responsive with seamless adaptation on all screen sizes.
7. Keep all existing content, structure, and functionality intact.

# Output Format

Return the full updated code including all HTML, CSS (with improved styles), and JavaScript as a single self-contained snippet that can be copied and used immediately.

The code must preserve all original text, icons, links, and scripts but incorporate advanced, visually attractive design improvements according to modern UI/UX standards.

# Notes

- Font Awesome icons must remain as is.
- The welcome message, navigation cards, important links sections, company overview, helpful resources, help section, and footer should maintain their content and structure.
- Smooth scrolling script should remain functional and unchanged unless necessary for design consistency.