/* 新增：小乌龟 / 海豹 / 小熊猫 */

.turtle{left:210px;bottom:70px;width:44px;animation:crawl 16s linear infinite}
.seal{right:6px;bottom:104px;width:56px;animation:sealbob 3.8s ease-in-out infinite}
.redpanda{left:72px;bottom:186px;width:54px;animation:catbob 4.2s ease-in-out infinite}
.cow{right:70px;bottom:140px;width:52px;animation:bob 3.5s ease-in-out infinite}

@keyframes sealbob{
  0%,100%{transform:translateY(0) rotate(-2deg)}
  50%{transform:translateY(-8px) rotate(3deg)}
}