#section07 a {
  margin-top: 0px;
}

#section07 a span {
  position: absolute;
  top: 0;
  left: 50%;
  width: 24px;
  height: 24px;
  margin-left: -12px;
  border-left: 1px solid #ffffff;
  border-bottom: 1px solid #ffffff;
  -webkit-transform: rotate(-45deg);
  transform: rotate(-45deg);
  -webkit-animation: sdb07 2s infinite;
  animation: sdb07 2s infinite;
  opacity: 0;
  box-sizing: border-box;
}
#section07 a span:nth-of-type(1) {
  -webkit-animation-delay: 0s;
  animation-delay: 0s;
}
#section07 a span:nth-of-type(2) {
  top: 16px;
  -webkit-animation-delay: .15s;
  animation-delay: .15s;
}
#section07 a span:nth-of-type(3) {
  top: 32px;
  -webkit-animation-delay: .3s;
  animation-delay: .3s;
}
@-webkit-keyframes sdb07 {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}
@keyframes sdb07 {
  0% {
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    opacity: 0;
  }
}