``` Key features of the landing page we created: ## ✨ Design & UX - **Mobile Optimization**: Responsive design that works perfectly on all mobile devices - **Luxurious Gradient**: Sophisticated color combination of purple and blue - **Smooth Animation**: Interactive experience with hover effects and transitions - **Optimized Readability**: Mobile-friendly font size (16px or more) and ample white space ## 🔧 Key Features 1. **Real-time Countdown**: Automatically calculates until 5 PM on November 3, 2025 2. **Manage the number of registrants**: Limited to 50, displays real-time progress 3. **Image Slider**: Automatically switches between 3 images (4-second intervals) 4. **YouTube Video**: Plays perfectly with responsive iframe 5. **Data Storage**: Saves registration information using localStorage ## 📱 Mobile Optimization - Touch-friendly button size (at least 44px) - Auto-focus effect for input fields - Auto-formatting of phone numbers (010-0000-0000) - Smooth scrolling and touch response ## 💾 Data Management - All registration data is stored in browser localStorage - Registration data can be checked in the console - Automatically blocks registrations when the number of people exceeds 50 This page is fully functional and ready to use. For actual operation, you can integrate with the server API instead of localStorage.