.lumen-ad-shell{display:flex;flex-direction:column;align-items:center}
.lumen-ad-skeleton{position:relative;overflow:hidden}
.lumen-ad-skeleton::after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,transparent,rgba(255,255,255,.45),transparent);transform:translateX(-100%);animation:shimmer-overlay 1.8s ease-in-out infinite}
@keyframes shimmer-overlay{100%{transform:translateX(100%)}}