.logo-container {
    position: absolute;
    left: 120px;
    top: 109px;
    z-index: 2000;
    width: 120px;
    height: 50px;
    background: url('../images/company-logo.png') no-repeat center/contain;
    /* background-color: blue; */
    transition: 0.3s;
    z-index: 10001;
}
/* 手机端 */
@media (max-width: 576px) {
  .box { width: 100%; }
}

/* 平板 */
@media (min-width: 577px) and (max-width: 992px) {
  .box { width: 50%; }
}

/* 桌面端 */
@media (min-width: 993px) {
  .box { width: 25%; }
}