CSS3如何完成全景图的动画效果（附代码）

完整CSS代码：

.panorama {
  width: 300px;
  height: 300px;
  background-image: url(http://7vilbi.com1.z0.glb.clouddn.com/blog/6608185829213862083.jpg);
  background-size: auto 100%;
  cursor: pointer;
  animation: panorama 10s linear infinite alternate;
  animation-play-state: paused;
}

.panorama:hover,
.panorama:focus {
  animation-play-state: running;
}

@keyframes panorama {
  to {
    background-position: 100% 0;
  }
}