html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

* {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

main {
  background: #20a0ff;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.title {
  color: #fff;
}

h1 {
  font-size: 60px;
  text-align: center;
  margin: 0;
}

h3 {
  font-size: 24px;
  text-align: center;
  margin: 0;
}

p {
  margin: 15px 0;
  text-align: center;
  font-size: 24px;
}

.code {
  margin: 30px 0;
}

.code .wrapper {
  width: 400px;
  height: 380px;
  line-height: 380px;
  text-align: center;
  border: 5px dashed #fff;
}

.code .code-item {
  font-size: 40px;
  color: #fff;
}

.code .code-item.right {
  font-size: 50px;
  color: #67c23a;
}

.code .code-item.wrong {
  font-size: 50px;
  color: #f56c6c;
}

@media screen and (max-width: 414px) {
  h1 {
    font-size: 50px;
  }
  h3, p {
    font-size: 14px;
  }
  .code .wrapper {
    width: 300px;
    height: 280px;
    line-height: 280px;
  }
  .code .code-item {
    font-size: 14px;
  }
  .code .code-item.right {
    font-size: 20px;
  }
  
  .code .code-item.wrong {
    font-size: 20px;
  }
}