* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
}

body {
  font-family: "Helvetica", "Arial", sans-serif;
  color: #444444;
  font-size: 9pt;
  background-color: #fafafa;
}

#root {
  width: 100vw;
  height: 100vh;
}
#canvas {
  width: 100vw;
  height: 100vh;
  border: 1px solid black;
}

.arrows {
  width: 60px;
  height: 72px;
  position: absolute;
  left: 50%;
  margin-left: -30px;
  cursor: pointer;
}

.arrows-up {
  top: 20px;
  transform: rotateX(173deg);
}

.arrows-down {
  bottom: 20px;
}

.arrows path {
  stroke: #2994d1;
  fill: transparent;
  stroke-width: 1px;
  animation: arrow 2s infinite;
  -webkit-animation: arrow 2s infinite;
}

@keyframes arrow {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  80% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

@-webkit-keyframes arrow /*Safari and Chrome*/ {
  0% {
    opacity: 0;
  }
  40% {
    opacity: 1;
  }
  80% {
    opacity: 0;
  }
  100% {
    opacity: 0;
  }
}

.arrows path.a1 {
  animation-delay: -1s;
  -webkit-animation-delay: -1s; /* Safari 和 Chrome */
}

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

.animation {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 100vw;
  height: 100vh;
  opacity: 1;
  animation: an 4s linear;
  animation-delay: 0.5s;
  animation-fill-mode: forwards;
  background: #000003;
  transform: translate(-50%, -50%);
}

.contacts-link {
  width: 100px;
  height: 20px;
  display: block;
  position: absolute;
  top: 0px;
  left: 0px;
}

#tg-link {
  width: 480px;
}
#email-link {
  width: 310px;
}