/* 滚动进入动画的初始与结束状态 */
[data-reveal] { opacity: 0; transform: translateY(40px); transition: opacity .7s ease-out, transform .7s ease-out; }
[data-reveal].revealed { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    [data-reveal] { opacity: 1; transform: none; transition: none; }
}