@media (min-width: 320px) {
  html {
    font-size: 32px;
  }
}
@media (min-width: 360px) {
  html {
    font-size: 36px;
  }
}
@media (min-width: 375px) {
  html {
    font-size: 37.5px;
  }
}
@media (min-width: 384px) {
  html {
    font-size: 38.4px;
  }
}
@media (min-width: 400px) {
  html {
    font-size: 40px;
  }
}
@media (min-width: 414px) {
  html {
    font-size: 41.4px;
  }
}
@media (min-width: 424px) {
  html {
    font-size: 42.4px;
  }
}
@media (min-width: 480px) {
  html {
    font-size: 48px;
  }
}
@media (min-width: 540px) {
  html {
    font-size: 54px;
  }
}

@media (min-width: 720px) {
  html {
    font-size: 72px;
  }
}
@media (min-width: 750px) {
  html {
    font-size: 75px;
  }
}
@media screen and (max-width: 750px) {
  .nav .menu-ctrol {
    display: block;
  }
  .nav .menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 1;
    padding-top: 1.2rem;
    width: 100%;
    background-color: #000000;
  }
  .nav .menu a {
    display: block;
    float: initial;
    line-height: 3;
    margin: 0;
    padding: 0 0.24rem;
  }
  .nav .menu a:focus {
    background-color: #333;
  }
  .nav .menu .menu-close-btn {
    display: block;
    position: absolute;
    right: 0.4267rem;
    top: 0.3067rem;
    width: 0.6667rem;
  }
  .nav .menu .menu-close-btn img {
    width: 100%;
  }
  .banner p:nth-child(1) {
    color: #ffffff;
    font-size: 0.6933rem;
    line-height: 1.0667rem;
    white-space: nowrap;
    text-align: left;
  }
  .banner p:nth-child(2) {
    color: #ffffff;
    font-size: 0.3933rem;
    line-height: 1.0667rem;
    white-space: nowrap;
    text-align: left;
  }
  
  .banner .content .desc {
    margin-top: 0;
    white-space: initial;
    font-size: 0.2667rem;
  }
  .demo {
    width: 100%;
    padding: 0 0.2667rem 1.0667rem;
    box-sizing: border-box;
  }
  .demo .video1,
  .demo .video2,
  .demo .video3 {
    width: 100%;
    height: initial;
    font-size: 0;
  }
  .demo .video1 {
    position: relative;
    height: 5.3333rem !important;
    overflow: hidden;
    border-radius: 0.2rem;
  }
  .demo .video1 img {
    width: initial;
    height: 100%;
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
  }
  .demo .video2 {
    margin-bottom: 0.4rem;
    margin-right: 0;
  }
  .do ul li {
    width: 100%;
    margin-bottom: 0.4rem;
  }
  .customers ul li {
    width: 100%;
    margin-bottom: 0.4rem;
  }

  .superiority ul li {
    width: 100%;
    padding: 0 1rem;
    box-sizing: border-box;
  }
  .stars ul li {
    width: 100%;
    padding: 0 1rem;
    box-sizing: border-box;
  }
  .goalv p {
    width: 100%;
    padding: 0 0.5rem;
    box-sizing: border-box;
  }
  .footer {
    height: initial;
    // display: block;
  }
  .footer .footer-en-title,
  .footer .footer-title {
    text-align: center;
  }
  .footer p {
    padding-left: 0.2rem;
    box-sizing: border-box;
  }
  .footer p img {
    margin-right: 0.1rem !important;
  }
  .footer .address {
    margin-top: 1rem;
  }
  .footer .content .qrcode {
    // padding-left: 1rem;
    top: 3.2rem;
    right: 0.2rem;
  }
  .footer .beian {
    margin-top: 1rem;
    position: relative;
    line-height: 1.6;
  }
  .footer .beian a {
    display: block;
  }
  .play-video-container {
    background-color: #000000;
  }
  .play-video-container .close {
    margin-left: 4rem;
    top: 0.4rem;
  }
  .play-video-container .close::after,
  .play-video-container .close::before {
    height: 0.05rem;
    background-color: #fff;
  }
  .do ul,
  .customers ul,
  .superiority ul,
  .stars ul,
  .share .content,
  .solution .club-container,
  .footer .content {
    width: 100%;
  }
  .min-width {
    width: 100%;
    min-width: initial;
  }
  ul {
    padding-left: 0;
  }
}