CSS只在Safari内部工作？

Question

我已尝试使用此地图标记：Codepen Map marker CSS only。 但是当我尝试在外部样式表中定义样式时，它在Safari中不起作用。

这里是CSS Codepen CSS-Stylesheet：

.pin {
  width: 30px;
  height: 30px;
  border-radius: 50% 50% 50% 0;
  background: #89849b;
  position: absolute;
  transform: rotate(-45deg);
  left: 50%;
  top: 50%;
  margin: -20px 0 0 -20px;
}
.pin:after {
  content: "";
  width: 14px;
  height: 14px;
  margin: 8px 0 0 8px;
  background: white;
  position: absolute;
  border-radius: 50%;
}

.bounce {
  animation-name: bounce;
  animation-fill-mode: both;
  animation-duration: 1s;
}

.pulse {
  background: rgba(0, 0, 0, 0.2);
  border-radius: 50%;
  height: 14px;
  width: 14px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin: 11px 0px 0px -12px;
  transform: rotateX(55deg);
  z-index: -2;
}
.pulse:after {
  content: "";
  border-radius: 50%;
  height: 40px;
  width: 40px;
  position: absolute;
  margin: -13px 0 0 -13px;
  animation: pulsate 1s ease-out;
  animation-iteration-count: infinite;
  opacity: 0;
  box-shadow: 0 0 1px 2px #89849b;
  animation-delay: 1.1s;
}

@keyframes pulsate {
  0% {
    transform: scale(0.1, 0.1);
    opacity: 0;
  }

  50% {
    opacity: 1;
  }

  100% {
    transform: scale(1.2, 1.2);
    opacity: 0;
  }
}
@keyframes bounce {
  0% {
    opacity: 0;
    transform: translateY(-2000px) rotate(-45deg);
  }

  60% {
    opacity: 1;
    transform: translateY(30px) rotate(-45deg);
  }

  80% {
    transform: translateY(-10px) rotate(-45deg);
  }

  100% {
    transform: translateY(0) rotate(-45deg);
  }
}

出了什么问题？非常感谢！