@media (max-width: 750px) {
  .common-head .header-banner .nav-back {
    font-size: 28px;
  }
  .common-head .header-banner .nav-back .nav-left {
    width: 32px;
    height: 32px;
  }
  .common-head .header-banner .banner-title {
    font-size: 64px;
    line-height: 84px;
    margin: 32px auto;
  }
  .common-head .header-banner .banner-sub-title {
    font-size: 28px;
  }
  .footer-share {
    margin-top: 56px;
    width: 100%;
  }
  .footer-share .footer-text {
    font-size: 28px;
    line-height: 48px;
  }
  .footer-share .share-box > img {
    width: 48px;
    height: 48px;
  }
}