/* ===== 滚动揭示动效（除 index 外的页面共用） ===== */
/* 仅在 JS 可用时隐藏，避免无脚本环境内容不可见 */
.js .reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity .7s ease, transform .7s cubic-bezier(.16, 1, .3, 1);
    will-change: opacity, transform;
}
.js .reveal.is-visible {
    opacity: 1;
    transform: none;
}

/* 尊重系统“减少动效”偏好 */
@media (prefers-reduced-motion: reduce) {
    .js .reveal {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}