/* 页脚心跳动画 */
  #heartbeat {
    color: red;
    animation: iconAnimate 1s ease-in-out infinite;
  }
  @-moz-keyframes iconAnimate {
    0%,
    100% {
      transform: scale(1);
    }
    10%,
    30% {
      transform: scale(0.9);
    }
    20%,
    40%,
    60%,
    80% {
      transform: scale(1.1);
    }
    50%,
    70% {
      transform: scale(1.1);
    }
  }
  @-webkit-keyframes iconAnimate {
    0%,
    100% {
      transform: scale(1);
    }
    10%,
    30% {
      transform: scale(0.9);
    }
    20%,
    40%,
    60%,
    80% {
      transform: scale(1.1);
    }
    50%,
    70% {
      transform: scale(1.1);
    }
  }
  @-o-keyframes iconAnimate {
    0%,
    100% {
      transform: scale(1);
    }
    10%,
    30% {
      transform: scale(0.9);
    }
    20%,
    40%,
    60%,
    80% {
      transform: scale(1.1);
    }
    50%,
    70% {
      transform: scale(1.1);
    }
  }
  @keyframes iconAnimate {
    0%,
    100% {
      transform: scale(1);
    }
    10%,
    30% {
      transform: scale(0.9);
    }
    20%,
    40%,
    60%,
    80% {
      transform: scale(1.1);
    }
    50%,
    70% {
      transform: scale(1.1);
    }
  }