@keyframes pulse-border {
            0%, 100% { border-color: rgba(99, 102, 241, 0.5); }
            50% { border-color: rgba(99, 102, 241, 1); box-shadow: 0 0 15px rgba(99, 102, 241, 0.3); }
        }
        .hero-img-box { animation: pulse-border 3s infinite; border-width: 4px; }