* {
  padding: 0;
  margin: 0;
}

ul {
  list-style: none;
}

@media screen and (min-width: 750px) {
  .main-min {
    display: none !important;
  }

  body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
    background: url("../img/ks.jpg") no-repeat center #666;
    background-size: cover;
  }

  .main-pc {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    position: relative;
    z-index: 2;
    background: transparent url('../img/pc_bg.png') 50% 50% no-repeat;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
  }

  .mask {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    z-index: 1;
  }

  video {
    width: 100%;
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    filter: brightness(0.9);
  }

  .container {
    width: 85%;
    margin: 0 auto;
  }

  .header {
    display: flex;
    width: 100%;
    justify-content: space-between;
    height: 100px;
    align-items: center;
  }

  .header .logo {
    width: 300px;
    height: 69px;
    background: url("../img/ttt.png") no-repeat;
    background-size: contain;
  }

  .header .sound {
    width: 20px;
    height: 20px;
    background: url('../img/soundpause.png') no-repeat;
    background-size: contain;
    cursor: pointer;
    margin-left: 20px;
  }

  .header .sound.pause {
    width: 20px;
    height: 20px;
    background: url('../img/playicon.png') no-repeat;
    background-size: contain;
    cursor: pointer;
  }

  .text-img {
    width: 520px;
    height: 140px;
    margin-top: 35vh;
    background: url("../img/tttslogan.png") no-repeat;
    background-size: contain;
  }

  .rowBox {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    position: relative;
    z-index: 999;
  }

  .codeBox {
    margin-top: 0px;
    width: 160px;
  }

  .TGBox {
    margin-left: 30px;
    height: 150px;
    overflow: hidden;
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: space-evenly;
  }

  .TGBox img {
    width: 30px;
    height: 30px;
    margin-right: 10px;
    display: inline-block;
    position: relative;
    top: 2px;
  }

  .TGBox .ios-download-btn {
    background: url("../img/ios_new.png") no-repeat;
    background-size: 100%;
    width: 150px;
    height: 50px;
    display: flex;
  }

  .TGBox .and-download-btn {
    background: url("../img/android_new.png") no-repeat;
    background-size: 100%;
    width: 150px;
    height: 50px;
    display: flex;
  }

  .TGBox .creator-download-btn {
    background: url("../img/creator_down.png") no-repeat;
    background-size: 100%;
    width: 150px;
    height: 50px;
    display: flex;
  }


  .TGBox span {
    font-size: 30px;
    color: rgb(255, 255, 255);
    line-height: 32px;
    display: inline-block;
  }

  .TGBox a {
    color: rgb(255, 255, 255);
    text-decoration: none;
  }

  #code {
    width: 100%;
    height: 160px;
    background-color: white;
    padding: 5px;
  }

  .code-text {
    font-size: 14px;
    color: #ffffff;
    text-align: center;
    margin-top: 3px;
  }

  .tip {
    width: 100%;
    text-align: center;
    position: absolute;
    bottom: 20px;
    left: 0;
    color: #ffffff;
    font-size: 14px;
  }

  .background_bg {
    display: none;
  }
}

@media screen and (max-width: 750px) {
  #background_video {
    display: none;
    width: 100%;
    height: 100%;
    background: transparent url('../img/ks.jpg') 50% 50% no-repeat;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
  }

  .background_bg {
    width: 100%;
    background: transparent url('../img/mobilebg.jpg') 50% 50% repeat-y;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
  }

  .main-pc {
    display: none !important;
  }

  body {
    width: 100%;
    height: 100%;
    position: absolute;
    background: rgb(24,16,26);
  }

  .main-min {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
  }

  .logo {
    width: 1.48rem;
    height: 1.48rem;
    background-size: contain;
    margin: 8vh auto 0;
  }

  .mobile-phone-install {
    text-align: center;
  }

  .mobile-phone-install .mobile-install-title {
    color: #fff;
    font-size: 18px;
    margin: 20px auto;
  }

  .mobile-phone-install .mobile-install-content {
    border-radius: 10px;
    margin: 20px;
    padding: 20px;
    background-color: rgba(255, 255, 255, 0.1);
  }

  .mobile-phone-install .mobile-install-content .tab-nav-box {
    font-size: 14px;
    height: 44px;
    display: flex;
    justify-content: center;
  }
  .mobile-phone-install .mobile-install-content .tab-nav-box .item {
    padding: 0 50px;
    cursor: pointer;
    color: #fff;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
  }
  .mobile-phone-install .mobile-install-content .tab-nav-box .item:first-child {
    border-radius: 5px 0 0 5px;
  }
  .mobile-phone-install .mobile-install-content .tab-nav-box .item:last-child {
    border-radius: 0 5px 5px 0;
  }
  .mobile-phone-install .mobile-install-content .tab-nav-box .active {
    color: rgb(26, 26, 26);
    background: rgb(255, 255, 255);
  }
  .mobile-phone-install .mobile-install-content .tab-content-box {
    margin-top: 20px;
    overflow: hidden;
    position: relative;
  }
  .mobile-phone-install .mobile-install-content .tab-content-box .item {
    width: 100%;
    height: auto;
    position: absolute;
    top: 0;
    left: 100%;
    z-index: 1;
    transition: left .3s;
  }
  .mobile-phone-install .mobile-install-content .tab-content-box .active {
    left: 0;
  }
  .mobile-phone-install .mobile-install-content .tab-content-box .item p {
    text-align: left;
    font-size: 14px;
    color: rgb(255, 255, 255);
  }

  .mobile-logo1 {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin: 25px auto;
  }

  .mobile-logo1 img {
    width: 80%;
  }

  .mobile-logo2 img {
    width: 90%;
  }

  .mobile-logo-container {
    display: flex;
    flex-direction: column;
    height: 100%;
  }

  .mobile-logo-container .tip-text {
    text-align: center;
    color: #fff;
    font-size: 10px;
    padding: 20px 15px;
  }

  .mobile-logo-container .flex-box {
    flex: 1;
    align-items: center;
    justify-content: center;
  }

  .mobile-download {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 50px;
  }

  .mobile-download-button {
    width: 130px;
    height: 40px;
    line-height: 40px;
    padding: 10px;
  }

  .join-tg-group {
    width: 200px;
    margin: 0 auto;
  }

  .join-tg-group img {
    width: 100%;
    height: 100%;
  }

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

  .text-img {
    width: 6.8rem;
    height: 1.35rem;
    background-size: contain;
    margin: 4vh auto 0;
  }

  .android-down {
    width: 4rem;
    height: 1.12rem;
    background: url("../img/android_new.png") no-repeat;
    background-size: contain;
    margin: 16vh auto 0;
  }

  .android-down a {
    display: block;
    width: 100%;
    height: 1.12rem;
  }

  .ios-down-liu {
    width: 4rem;
    height: 1.12rem;
    background: url("../img/ios_new.png") no-repeat;
    background-size: contain;
    margin: 16vh auto 0;
  }

  .ios-down-liu a {
    display: block;
    width: 100%;
    height: 1.12rem;
  }

  .min-bg {
    width: 100%;
    height: 100%;
    background-size: cover;
    position: absolute;
    top: 0;
    z-index: -2;
    animation: identifier 30s infinite linear;
  }

  @keyframes identifier {
    0% {
      background-position-x: 0%;
    }

    100% {
      background-position-x: 100%;
    }
  }

  .mask {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    position: absolute;
    top: 0;
    z-index: 0;
  }
}

#background_video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  height: 100%;
  width: 100%;
  z-index: -1;
  filter: brightness(0.8);
}

.background_bg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  object-fit: cover;
  height: 100%;
  width: 100%;
  z-index: -1;
  filter: brightness(0.8);
}

#video_cover {
  position: absolute;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

#overlay {
  top: 0;
  right: 0;
  left: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
}

.tg-btn {
  padding: 0 15px;
  height: 32px;
  opacity: 0.95;
  background: rgb(255, 255, 255, 0.2);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  font-size: 14px;
  text-align: center;
  color: #fff;
  line-height: 32px;
  cursor: pointer;
}

.tg-btn img {
  width: 0;
  vertical-align: middle;
  transition: 0.2s all;
}

.tg-btn:hover img {
  width: 14px;
}