I want you to act as a web developer and please write some code for me to create a countdown timer for the website.

I want you to act as a web developer and please write some code for me to create a countdown timer for the website.
Design Style: Utilize the “digital card flip” or “neon light” style. The background should be dark (e.g., #121212), while the digits should be bright (e.g., white or the brand’s primary color).
Layout structure:
The countdown timer is divided into four main sections: days, hours, minutes, and seconds.
Each block consists of a large display area for numbers and a small label text (such as “Days,” “Hours”).
Use colons (:) or slashes (/) as separators between blocks, and add a subtle pulse animation effect.
Numeric style: Numerals are displayed using monospaced font (Monospace) to ensure consistent width and greater visual stability.