@media (max-width: 750px) {
  html {
    min-width: 100%;
    font-size: 10vw;
  }

  body {
    min-width: inherit;
    overflow: hidden;
  }

  .download {
    top: 0;
    height: 100vh;
    align-items: center;
    width: 90%;
  }

  .download .download-left {
    width: 100%;
  }

  .download-right {
    display: none;
  }

  .download-mobile {
    display: block;
    width: 40%;
  }

  .download-mobile img {
    width: 100%;
  }

  .download-left .group {
    margin: .53rem 0;
  }

  .download-text .box-tip h4 {
    font-size: .26rem;
  }

  .download-text .box-tip h4 {
    font-size: .48rem;
  }

  .download .download-left h1 {
    font-size: 1rem;
  }

  .download .download-left h3 {
    font-size: .5rem;
  }

  .download .btn-img img {
    width: 100%;
    height: inherit;
  }

  .download-text .box-tip {
    margin-bottom: 0.4rem;
  }

  .download-text .box-tip p {
    width: 100%;
    font-size: .35rem;
    max-width: 248px;
  }
  .install_dow {
    width: 100%;
    height: calc(100% - 35px);
    top: auto;
  }

  .install_nav {
    width: 100%;
    margin: 0;
  }

  .install_box {
    position: absolute;
    top: 44px;
    display: flex;
    height: 100%;
    height: calc(100% - 44px);
    overflow: auto;
  }

  .install_con>li {
    width: 50%;
  }
}