html {
  font-size: 12px;
  font-family: PingFangSC-Regular,sans-serif;
  line-height: 0px;
}

.app {
  margin: auto;
  width: 100%;
}

#pc {
  display: block;
}

#mobile {
  display: none;
}

nav {
  position: fixed;
  height: 48px;
  top: 0;
  z-index: 999;
  width: 100%;
  background-color: #28A5EC;
  flex: 1;
  padding: 0px 12px;
  display: flex;
  justify-content: center;
  align-items: center;
}

nav .logo {
  width: 200px;
}

.nav-bottom-gap {
  height: 48px;
}

.content1 {
  width: 100%;
  position: relative;
}

.content2 {
  width: 100%;
}

.content3 {
  width: 100%;
}

.content4 {
  width: 100%;
}

#pc .content4 {
  width: 70%;
  position: absolute;
  left: 15%;
}


#pc .downloads {
  width: 100%;
  position: absolute;
  top: 27.5%;
  height: 30%;
  display: flex;
  justify-content: center;
}

#pc .downloads .downloads-inner {
  display: flex;
  justify-content: space-between;
}

#pc .downloads a {
  position: relative;
  width: 17vw;
  height: auto;
}

#pc .downloads a img {
  width: 100%;
  height: auto;
}

#mobile .downloads {
  width: 100%;
  position: absolute;
  top: 55%;
  display: flex;
  justify-content: center;
  align-items: center;
}

#mobile .downloads .app-download-button {
  background-color: #4b9add;
  height: 40px;
  width: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: white;
  border-radius: 10px;
  box-shadow: #4b9add 0px 4px 10px 0px;
  font-size: 1.4rem;
  letter-spacing: 0.5rem;
  text-decoration: unset;
}

#iphone-download-button {
  position: absolute;
  top: 8vw;
  left: 2.5vw;
  width: 12vw;
  height: 3vw;
}

#android-download-button {
  position: absolute;
  top: 8vw;
  left: 2.5vw;
  width: 12vw;
  height: 3vw;
}

.downloads  .tutorial-button {
  position: absolute !important;
  right: 16vw;
  top: 11.5vw;
  background-color: transparent;
  font-size: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.copyrights {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-top: 5rem;
  padding-bottom: 2rem;
}

.copyrights span {
  margin-bottom: 24px;
}

@media screen and (max-width: 768px) {
  #pc {
    display: none;
  }
  #mobile {
    display: block;
  }
}