ブラウザ内でNode.js即実行！WebContainer入門

Create a landing page that introduces WebContainer — a technology that runs Node.js entirely in the browser. The design should be modern, techy, and feature a live code editor preview that demonstrates a simple Node.js script executing inside a web browser. Use Swiper for a smooth sliding explanation of how it works, GSAP for subtle entrance animations, and AOS for scroll-based reveals. The page should visually convey "zero setup, instant execution" with a dark theme, gradient accents, and a concise hero section. Include a working mock code editor that shows a WebContainer terminal output.