html,
body {
  height: 100%;
}

body {
  max-height: 100%;
  background-image: url('1080.png');
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

main {
  height: 100%;
}

.mycontainer {
  display: flex;
  align-items: start;
  flex-direction: column;
  height: 100%;
  margin: 0 auto;
  width: 100%;
}

.logo {
  height: auto;
  width: 314px;
  margin-left: 100px;
  margin-top: auto;
  margin-bottom: calc(30vh + 120px);
}

.centered-div {
  position: absolute;
  width: 314px;
  height: 125px;
  bottom: 30vh;
  left: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  /* transform: scale(0.4); */
}

.top-left, .top-right {
  position: absolute;
  top: 0;
  width: 155px;
  height: 63px;

}

.top-left {
  left: 0;
}

.top-right {
  right: 0;
}

.bottom-center {
  align-self: center;
  width: 210px;
  height: 55px;
}

/* 移动端样式，放在全局作用域，兼容所有浏览器 */
@media (max-width: 600px) {
  body {
    background-image: url('bg.png');
  }
  .mycontainer {
    align-items: center;
  }
  .logo {
    height: 20vh;
    margin-left: 0;
    margin-top: 5vh;
    width: auto;
  }
  .centered-div {
    bottom: auto;
    top: 25vh;
    left: auto;
  }
}