渐变文字显现

Create a large headline with a scroll-driven gradient text reveal. The text should start dim or transparent and become fully visible as the user scrolls, with a gradient "light" moving across the letters. Use background-clip: text, a long animated gradient background, and tie the background-position to scroll progress (CSS scroll-driven animation or JS). Use a dark background and a bold sans-serif font. Use Tailwind CSS.

创建一个带滚动驱动渐变文字显现的大标题。文字应从暗淡或透明开始，随用户滚动逐渐完全可见，一道渐变"光"扫过字母。使用 background-clip: text、长动画渐变背景，并将 background-position 与滚动进度绑定（CSS 滚动驱动动画或 JS）。使用深色背景和粗体无衬线字体。使用 Tailwind CSS。