.ad-banner {
    background-color: #ffd700;
    overflow: hidden;
    white-space: nowrap;
    box-sizing: border-box;
}

.ad-banner-text {
    display: inline-block;
    padding-left: 100%;
    animation: scroll-left 15s linear infinite;
    font-weight: bold;
    font-size: 18px;
}

@keyframes scroll-left {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-100%);
    }
}