.marquee-container {
    overflow: hidden;
    position: relative;
}
.marquee-content {
    display: inline-block;
    white-space: nowrap;
    animation: marquee 20s linear infinite;
    animation-direction: alternate-reverse;
}
@keyframes marquee {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100%); }
}