.sanyuansu-box {
  width: 90vh;
  height: 90vh;
  background-size: cover;
  /* background-color: aqua; */
  display: flex;
  flex-direction: column;
  justify-content: space-around;
  align-items: center;
  position: relative;
}
.circle-arrow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-20deg);
  width: 90%;
  opacity: 0;
  animation: arrowShow 1s ease 1s forwards;
}

@keyframes arrowShow {
  to {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(0deg);
  }
}
.sys-top {
  position: absolute;
  top: 10%;
  left: 50%;
  transform: translate(-50%, -50%) translateY(20px);
  width: 20%;
  opacity: 0;
  animation: sysTopShow 1s ease 1s forwards;
}

@keyframes sysTopShow {
  to {
    opacity: 1;
    transform: translate(-50%, -50%) translateY(0);
  }
}
.sys-bottom {
  position: absolute;
  bottom: 3%;
  left: 50%;
transform: translate(-50%, -50%) translateY(-20px);
  width: 40%;
  opacity: 0;
  animation: sysBottomShow 1s ease 1s forwards;
}

@keyframes sysBottomShow {
  to {
    opacity: 1;
    transform: translate(-50%, -50%) translateY(0);
  }
}
.sys-text {
  position: absolute;
  font-family: PingFangSC, PingFang SC;
  font-weight: 400;
  font-size: 0.8vw;
  color: #000000;
  line-height: 24px;
  text-align: center;
  opacity: 0;
  animation: fadeIn 1s ease 1s forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
  }
}
.sys-left-text {
  top: 35%;
  left: 12%;
}
.sys-right-text {
  top: 35%;
  right: 12%;
}
.sys-bottom-text {
  bottom: 15%;
  left: 46%;
}
.red-ball {
  position: absolute;
  top: 42%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 35%;
  animation: ballMove 6s ease-in-out infinite;
}

.blue-ball {
  display: block;
  position: absolute;
  top: 60%;
  left: 63%;
  transform: translate(-50%, -50%);
  width: 35%;
  animation: ballMove 6s ease-in-out infinite 0.5s;
}

@keyframes ballMove {
  0% {
    transform: translate(-50%, -50%) translate(0, 0);
  }
  25% {
    transform: translate(-50%, -50%) translate(10px, -8px);
  }
  50% {
    transform: translate(-50%, -50%) translate(-8px, 10px);
  }
  75% {
    transform: translate(-50%, -50%) translate(5px, 5px);
  }
  100% {
    transform: translate(-50%, -50%) translate(0, 0);
  }
}
.puple-ball {
  position: absolute;
  top: 60%;
  left: 39%;
  transform: translate(-50%, -50%);
  width: 35%;
  animation: ballMove 6s ease-in-out infinite 1s;
}