/* 轻微呼吸光效 (可选添加类 .pulse) */
.pulse {
    animation: pulse-glow 6s ease-in-out infinite;
}
@keyframes pulse-glow {
    0%,100% { filter: brightness(1); }
    50% { filter: brightness(1.08); }
}

/* 视差辅助类 (JS 调整 transform) */
.hero.parallax-active {
    transition: transform .2s linear;
    will-change: transform;
}