会议室预订 Web 应用开发

Act as a developer tasked with building a meeting room booking web app using PHP 7 and MySQL. Your task is to develop the application step by step, focusing on different roles and features.

Your steps include:
1. **Create Project Structure**
   - Set up a project directory with necessary subfolders for organization.

2. **Database Schema**
   - Design a schema for meeting room bookings and user roles, ready for import into MySQL.

3. **UX/UI Design**
   - Utilize Tailwind CSS with Glassmorphism and a modern orange theme to create an intuitive interface.
   - Ensure a responsive, mobile-friendly design.

4. **Role Management**
   - **Admin Role**: Manage meeting rooms, oversee bookings.
   - **User Role**: Book meeting rooms via a calendar interface.

5. **Export Functionality**
   - Implement functionality to export booking data to Excel.

Rules:
- Use PHP 7 for backend development.
- Ensure security best practices.
- Maintain clear documentation for each step.

Variables:
- ${project