.ellipses-container {
  width: 40rem;
  height: 40rem;
  border-radius: 50%;
  margin: 0 auto;
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 100;
}
.ellipses-container .greeting,
.login-box h2.greeting {
  position: absolute;
  top: 11.6rem;
  left: 50%;
  transform: translateX(-45.5%);
  text-transform: uppercase;
  letter-spacing: 4rem;
  font-size: 2.2rem;
  font-weight: 400;
  color: white;
  font-family: 'Playfair Display', serif;
  font-style: italic;
  text-align: center;
  width: auto;
  padding-left: 2rem; /* 补偿letter-spacing的偏移 */
}
.ellipses-container .greeting:after {
  content: "";
  width: 0.8rem;
  height: 0.3rem;
  border-radius: 50%;
  display: inline-block;
  background-color: #ffffff;
  position: relative;
  top: -3.58rem;
  left: 8.65rem;
}

.ellipses {
  border-radius: 50%;
  position: absolute;
  top: 0;
  border-style: solid;
}

.ellipses__outer--thin {
  width: 100%;
  height: 100%;
  border-width: 1px;
  border-color: rgba(9, 56, 62, 0.1);
  -webkit-animation: ellipsesOrbit 15s ease-in-out infinite;
          animation: ellipsesOrbit 15s ease-in-out infinite;
}
.ellipses__outer--thin:after {
  content: "";
  background-image: url("https://s29.postimg.org/5h0r4ftkn/ellipses_dial.png");
  background-repeat: no-repeat;
  background-position: center;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  position: absolute;
  opacity: 0.15;
}

.ellipses__outer--thick {
  width: 99.5%;
  height: 99.5%;
  border-color: #cacaca transparent;
  border-width: 2px;
  transform: rotate(-45deg);
  -webkit-animation: ellipsesRotate 15s ease-in-out infinite;
          animation: ellipsesRotate 15s ease-in-out infinite;
}

.ellipses__orbit {
  width: 2.5rem;
  height: 2.5rem;
  border-width: 2px;
  border-color: #cacaca;
  top: 5rem;
  right: 6.75rem;
}
.ellipses__orbit:before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  display: inline-block;
  background-color: #cacaca;
  margin: 0 auto;
  left: 0;
  right: 0;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

@-webkit-keyframes ellipsesRotate {
  0% {
    transform: rotate(-45deg);
  }
  100% {
    transform: rotate(-405deg);
  }
}

@keyframes ellipsesRotate {
  0% {
    transform: rotate(-45deg);
  }
  100% {
    transform: rotate(-405deg);
  }
}
@-webkit-keyframes ellipsesOrbit {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}
@keyframes ellipsesOrbit {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(360deg);
  }
}
html {
  height: 100%;
}

.login-box {
  position: absolute;
  top: 68%;
  left: 50%;
  width: 300px;
  padding: 30px;
  transform: translate(-50%, -50%);
  background: transparent;
  box-sizing: border-box;
  box-shadow: none;
  border-radius: 0;
  z-index: 101;
}

.login-box.active {
  background: transparent;
  box-shadow: none;
  border-radius: 0;
}

.login-box h2:not(.greeting) {
  margin: 0 0 30px;
  padding: 0;
  color: #fff;
  text-align: center;
  font-family: 'Montserrat', sans-serif;
}

.input-group {
  position: relative;
  margin-bottom: 30px;
}

.input-group input {
  width: 100%;
  padding: 10px 0;
  font-size: 16px;
  color: #fff;
  margin-bottom: 30px;
  border: none;
  border-bottom: 1px solid #fff;
  outline: none;
  background: transparent;
  font-family: 'Montserrat', sans-serif;
}

.input-group label {
  position: absolute;
  top: 0;
  left: 0;
  padding: 10px 0;
  font-size: 16px;
  color: #fff;
  pointer-events: none;
  transition: .5s;
  font-family: 'Montserrat', sans-serif;
}

.input-group input:focus ~ label,
.input-group input:valid ~ label {
  top: -20px;
  left: 0;
  color: #03e9f4;
  font-size: 12px;
}

.login-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: transparent;
  color: white;
  border: none;
  font-family: 'Montserrat', sans-serif;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 102;
  padding: 0;
  text-decoration: none;
}

.login-btn:hover {
  text-decoration: underline;
  text-decoration-color: white;
}

.login-box {
  transition: all 0.5s ease;
}