#steam_box {
  z-index: -3;
  pointer-events: none;
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
}
@media (max-width: 768px) {
#steam_box {
overflow: hidden;
}
}
#steam_box > img {
  position: absolute;
  width: 300vw;
  animation: scale_anime 5s linear infinite;
}
#steam_box > img:nth-of-type(1) {
  animation-delay: -0.5s;
}
#steam_box > img:nth-of-type(2) {
  animation-delay: -1s;
}
#steam_box > img:nth-of-type(3) {
  animation-delay: -1.5s;
}
#steam_box > img:nth-of-type(4) {
  animation-delay: -2s;
}
#steam_box > img:nth-of-type(5) {
  animation-delay: -2.5s;
}
#steam_box > img:nth-of-type(6) {
  animation-delay: -3s;
}
#steam_box > img:nth-of-type(7) {
  animation-delay: -3.5s;
}
#steam_box > img:nth-of-type(8) {
  animation-delay: -4s;
}
#steam_box > img:nth-of-type(9) {
  animation-delay: -4.5s;
}
#steam_box > img:nth-of-type(10) {
  animation-delay: -5s;
}
#steam_box > img:nth-of-type(11) {
  animation-delay: -5.5s;
}
#steam_box > img:nth-of-type(12) {
  animation-delay: -6s;
}
#steam_box > img:nth-of-type(13) {
  animation-delay: -6.5s;
}
#steam_box > img:nth-of-type(14) {
  animation-delay: -7s;
}
#steam_box > img:nth-of-type(15) {
  animation-delay: -7.5s;
}
#steam_box > img:nth-of-type(16) {
  animation-delay: -8s;
}
#steam_box > img:nth-of-type(17) {
  animation-delay: -8.5s;
}
#steam_box > img:nth-of-type(18) {
  animation-delay: -9s;
}
#steam_box > img:nth-of-type(19) {
  animation-delay: -9.5s;
}
#steam_box > img:nth-of-type(20) {
  animation-delay: -10s;
}
#steam_box > img:nth-of-type(21) {
  animation-delay: -10.5s;
}
#steam_box > img:nth-of-type(22) {
  animation-delay: -11s;
}
#steam_box > img:nth-of-type(23) {
  animation-delay: -11.5s;
}
#steam_box > img:nth-of-type(24) {
  animation-delay: -12s;
}
#steam_box > img:nth-of-type(25) {
  animation-delay: -12.5s;
}
#steam_box > img:nth-of-type(26) {
  animation-delay: -13s;
}
#steam_box > img:nth-of-type(27) {
  animation-delay: -13.5s;
}
#steam_box > img:nth-of-type(28) {
  animation-delay: -14s;
}
#steam_box > img:nth-of-type(29) {
  animation-delay: -14.5s;
}
#steam_box > img:nth-of-type(30) {
  animation-delay: -15s;
}
#steam_box > img:nth-of-type(31) {
  animation-delay: -15.5s;
}
#steam_box > img:nth-of-type(32) {
  animation-delay: -16s;
}
#steam_box > img:nth-of-type(33) {
  animation-delay: -16.5s;
}
#steam_box > img:nth-of-type(34) {
  animation-delay: -17s;
}
#steam_box > img:nth-of-type(35) {
  animation-delay: -17.5s;
}
#steam_box > img:nth-of-type(36) {
  animation-delay: -18s;
}
#steam_box > img:nth-of-type(37) {
  animation-delay: -18.5s;
}
#steam_box > img:nth-of-type(38) {
  animation-delay: -19s;
}
#steam_box > img:nth-of-type(39) {
  animation-delay: -19.5s;
}
#steam_box > img:nth-of-type(40) {
  animation-delay: -20s;
}
#steam_box > img:nth-of-type(41) {
  animation-delay: -20.5s;
}
#steam_box > img:nth-of-type(42) {
  animation-delay: -21s;
}
#steam_box > img:nth-of-type(43) {
  animation-delay: -21.5s;
}
#steam_box > img:nth-of-type(44) {
  animation-delay: -22s;
}
#steam_box > img:nth-of-type(45) {
  animation-delay: -22.5s;
}
#steam_box > img:nth-of-type(46) {
  animation-delay: -23s;
}
#steam_box > img:nth-of-type(47) {
  animation-delay: -23.5s;
}
#steam_box > img:nth-of-type(48) {
  animation-delay: -24s;
}
#steam_box > img:nth-of-type(49) {
  animation-delay: -24.5s;
}
#steam_box > img:nth-of-type(50) {
  animation-delay: -25s;
}

@keyframes scale_anime {
  0% {
    opacity: 0;
    transform: scale(1);
  }
  10% {
    opacity: .2;
  }
  50% {
    opacity: 1;
  }
  90% {
    opacity: .2;
  }
  100% {
    opacity: 0;
    transform: scale(4);
  }
}