.download-banner {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
    padding: 50px;
    background: #f5f5f5;
}

.download-banner img {
    height: 180px;      /* 统一高度 */
    width: auto;       /* 宽度自适应 */
}