@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideIn {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes qrBounce {
  0%, 20%, 50%, 80%, 100% {
    transform: translateY(0);
  }
  40% {
    transform: translateY(-30px);
  }
  60% {
    transform: translateY(-15px);
  }
}

.header {
  flex: 0 0 auto;
  height: 72px;
  background-color: #386DF6;
  animation: slideIn 1s ease-out;
}

.header .box {
  display: flex;
  align-items: center;
  max-width: 910px;
  width: 100%;
  margin: 0 auto;
}

.header .logo {
  height: 72px;
}

.header .logo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.header .title {
  font-size: 18px;
  color: #fff;
}

.footer {
  flex: 0 0 auto;
  height: 72px;
  background-color: #222222;
  animation: fadeIn 2s ease-in;
}
.footer .box {
  display: flex;
  justify-content: center;
  align-items: center;
  column-gap: 16px;
  max-width: 910px;
  height: 100%;
  margin: 0 auto;
  color: #B7B7B7;
  font-size: 12px;
}
.footer .copyright {
  color: #666;
}

.main {
  flex: 1 1 100%;
  overflow: hidden;
}

.main .box {
  display: flex;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  max-width: 910px;
  height: 100%;
  padding: 5px 0;
  margin: 0 auto;
  overflow: hidden;
}
.main .photo {
  flex: 1 1 70%;
  height: 85%;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: auto;
  animation: fadeIn 1.5s ease-in;
}
.main .photo img {
  border-radius: 12px;
  box-shadow: 0 0 4px #ddd;
  height: 100%;
  max-height: 600px;
}
.main .intro {
  flex: 1 1 35%;
  width: 100%;
  min-width: 200px;
  display: flex;
  flex-direction: column;
  animation: fadeIn 2s ease-in;
}
.main .intro .desc {
  text-align: center;
  font-size: 18px;
  color: #212121;
  font-weight: bold;
  line-height: 2;
}
.main .intro .qr img {
  display: block;
  width: 100%;
  max-width: 200px;
  margin: 40px auto;
  animation: qrBounce 2s infinite;
}

.main .intro .mini{
    text-align: center;
}

@media (max-width: 768px) {
  .header {
    position: sticky;
    left: 0;
    top: 0;
  }
  .main {
    overflow: visible;
  }
  .main .box {
    flex-direction: column-reverse;
    row-gap: 20px;
  }
  .main .photo {
    width: 100%;
  }
  .main .intro {
    flex-direction: column-reverse;
  }
  .main .intro img {
    margin-top: 0;
    margin-bottom: 20px;
  }
  .footer .box {
    flex-direction: column;
    row-gap: 4px;
  }
}

.title {
  font-size: 24px;
  font-weight: bold;
  color: #386DF6;
  text-align: center;
  /* margin: 2px 0; */
  animation: fadeIn 2s ease-in-out;
}