video-shuoshan/web/src/components/AmbientBackground.tsx

import { useEffect, useRef } from 'react';

export function AmbientBackground() {
  const glowRef = useRef<HTMLDivElement>(null);

  useEffect(() => {
    const el = glowRef.current;
    if (!el) return;

    let rafId: number;
    let targetX = 50;
    let targetY = 50;
    let currentX = 50;
    let currentY = 50;

    const handleMouseMove = (e: MouseEvent) => {
      targetX = (e.clientX / window.innerWidth) * 100;
      targetY = (e.clientY / window.innerHeight) * 100;
    };

    const animate = () => {
      currentX += (targetX - currentX) * 0.08;
      currentY += (targetY - currentY) * 0.08;
      el.style.setProperty('--mouse-x', `${currentX}%`);
      el.style.setProperty('--mouse-y', `${currentY}%`);
      rafId = requestAnimationFrame(animate);
    };

    window.addEventListener('mousemove', handleMouseMove, { passive: true });
    rafId = requestAnimationFrame(animate);

    return () => {
      window.removeEventListener('mousemove', handleMouseMove);
      cancelAnimationFrame(rafId);
    };
  }, []);

  return (
    <>
      <div className="aurora-bg" aria-hidden="true">
        <div className="aurora-blob-3" />
      </div>
      <div className="grid-pattern" aria-hidden="true" />
      <div className="noise-overlay" aria-hidden="true" />
      <div ref={glowRef} className="cursor-glow" aria-hidden="true" />
    </>
  );
}