body {
            font-family: Arial, sans-serif;
            background-color: #f4f4f9;
            padding: 20px;
        }
        .marquee {
            overflow: hidden;
            white-space: nowrap;
            box-sizing: border-box;
        }
        .marquee-content {
            display: inline-block;
            animation: marquee 10s linear infinite;
        }
        @keyframes marquee {
            0% { transform: translateX(100%); }
            100% { transform: translateX(-100%); }
        }