【CSS】How to implement the opening animation that applies the effect of turning on a CRT TV when accessing the page using @keyframes to the full window size（Demo page）

body {
  background: #000;
}

.content {
  overflow: hidden;
  background: #fff;
}

.wrap p {
  text-align: center;
  margin: 0 auto;
  padding: 150px 0 0;
}

.show {
  background: #000;
}

.show .content {
  position: fixed;
  top: 50%;
  left: 50%;
  width: 100%;
  height: 100%;
  overflow: hidden;
  transform: translate3d(-50%, -50%, 0) scale(1, 0);
  backface-visibility: hidden;
  animation: show-anime 0.2s;
  animation-fill-mode: forwards;
  animation-delay: 0.3s;
}

@keyframes show-anime {
  0% {
      transform: translate3d(-50%, -50%, 0) scale(1, 0);
  }
  1% {
      transform: translate3d(-50%, -50%, 0) scale(1, 0.001);
  }
  10% {
      transform: translate3d(-50%, -50%, 0) scale(1, 0.001);
  }
  35% {
      transform: translate3d(-50%, -50%, 0) scale(0.5, 0.003);
  }
  100% {
      transform: translate3d(-50%, -50%, 0) scale(1, 1);
  }
}
@media screen and (max-width:640px){
  .wrap p {
    text-align: left;
  }
}
  

$(window).on('load', function(){
  $("body").addClass("show");
  setTimeout(function(){
   $("body").removeClass("show");
  },1000);
});