style.css

html,
html>body {
  margin: 0px;
  padding: 0px;
  height: 100%;
  width: 100%;
}

body {
  font-family: Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.8em;
  text-shadow: 0 0 1px rgba(255, 255, 255, 0.1);
  background: #fff;
}

img {
  border-width: 0px;
}

a {
  color: #000;
  text-decoration: none;
  outline: none;
  border: none;
}

.list,
.list li,
.list-left li {
  list-style: none;
  list-style-type: none;
  margin: 0px;
  padding: 0px;
}

.pos-f {
  position: fixed;
}

.left-100 {
  width: 100%;
  height: 100%;
}

.blur #DonateText,
.blur #donateBox,
.blur #github {
  -webkit-filter: blur(3px);
  filter: blur(3px);
}

.tr3 {
  transition: all .3s;
}

#DonateText {
  position: fixed;
  font-size: 12px;
  width: 70px;
  height: 70px;
  line-height: 70px;
  color: #fff;
  background: #ffd886 url(images/Like.svg) no-repeat center 10px;
  background-size: 20px;
  border-radius: 35px;
  text-align: center;
  left: calc(50% - 120px);
  top: calc(50% - 60px);
  z-index: -1;
  transform: rotateZ(-15deg);
}

#donateBox {
  left: calc(50% - 150px);
  top: calc(50% - 15px);
  background-color: #fff;
  border: 1px solid #ddd;
  border-radius: 6px;
  width: 299px;
  height: 28px;
  float: left;
  z-index: 1;
}

#donateBox li {
  width: 74px;
  float: left;
  text-align: center;
  border-left: 1px solid #ddd;
  background: no-repeat center center;
  background-color: rgba(204, 217, 220, 0.1);
  background-size: 45px;
  transition: all .3s;
  cursor: pointer;
  overflow: hidden;
  line-height: 600px;
  height: 28px;
  -webkit-filter: grayscale(1);
  filter: grayscale(1);
  opacity: 0.5;
}

#donateBox li:hover {
  background-color: rgba(204, 217, 220, 0.3);
  -webkit-filter: grayscale(0);
  filter: grayscale(0);
  opacity: 1;
}

#donateBox>li:first-child {
  border-width: 0;
}

#donateBox a {
  display: block;
}

#donateBox #PayPal {
  background-image: url(images/PayPal.svg);
}

#donateBox>#QQPay {
  background-image: url(images/QQPay.png);
  line-height: 28px;
}

#donateBox>#QQPay:hover {
  overflow: visible;
}

#donateBox #AliPay {
  background-image: url(images/AliPay.svg);
}

#donateBox #WeChat {
  background-image: url(images/WeChat.svg);
}

#QRBox {
  top: 0;
  left: 0;
  z-index: 1;
  background-color: rgba(255, 255, 255, 0.3);
  display: none;
  perspective: 400px;
}

#MainBox {
  cursor: pointer;
  position: absolute;
  text-align: center;
  width: 200px;
  height: 200px;
  left: calc(50% - 100px);
  top: calc(50% - 100px);
  background: #fff no-repeat center center;
  background-size: 190px;
  border-radius: 6px;
  box-shadow: 0px 2px 7px rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: all 1s ease-in-out;
  transform-style: preserve-3d;
  transform-origin: center center;
  overflow: hidden;
}

#github {
  width: 24px;
  height: 24px;
  left: calc(50% + 135px);
  top: calc(50% - 30px);
  background: no-repeat center center url(images/Github.svg);
  background-size: contain;
  opacity: 0.3;
  transform: rotateZ(15deg);
}

#MainBox.showQR {
  animation-name: showQR;
  animation-duration: 3s;
  animation-timing-function: ease-in-out;
  animation-delay: 300ms;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
  -webkit-animation: showQR 3s ease-in-out 300ms 1 normal forwards;
  animation: showQR 3s ease-in-out 300ms 1 normal forwards;
}

@keyframes showQR {
  from {
    transform: rotateX(90deg);
  }

  8% {
    opacity: 1;
    transform: rotateX(-60deg);
  }

  18% {
    opacity: 1;
    transform: rotateX(40deg);
  }

  34% {
    opacity: 1;
    transform: rotateX(-28deg);
  }

  44% {
    opacity: 1;
    transform: rotateX(18deg);
  }

  58% {
    opacity: 1;
    transform: rotateX(-12deg);
  }

  72% {
    opacity: 1;
    transform: rotateX(9deg);
  }

  88% {
    opacity: 1;
    transform: rotateX(-5deg);
  }

  96% {
    opacity: 1;
    transform: rotateX(2deg);
  }

  to {
    opacity: 1;
  }
}

#MainBox.hideQR {
  opacity: 1;
  animation-name: hideQR;
  animation-duration: 0.5s;
  animation-timing-function: ease-in-out;
  animation-iteration-count: 1;
  animation-fill-mode: forwards;
  -webkit-animation: hideQR 0.5s ease-in-out 0s 1 normal forwards;
  animation: hideQR 0.5s ease-in-out 0s 1 normal forwards;
}

@keyframes hideQR {
  from {}

  20%,
  50% {
    transform: scale(1.08, 1.08);
    opacity: 1;
  }

  to {
    opacity: 0;
    transform: rotateZ(40deg) scale(0.6, 0.6);
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }

  to {
    opacity: 1;
  }
}

#QRBox.fadeIn {
  display: block;
  animation: fadeIn 300ms;
}

@keyframes fadeOut {
  from {
    opacity: 1;
  }

  to {
    opacity: 0;
  }
}

#QRBox.fadeOut {
  display: block;
  animation: fadeOut 300ms;
}