打字动画每次都会停在设定的字符数处。如果我延长声明，它就会中断。如果我缩短语句，它会继续执行，直到达到设定的字符数。我知道我必须更改步数 (50)，但这并不是真正停止的数字，它停止于 28。

@import url('https://fonts.googleapis.com/css2?family=Courier+Prime&family=Source+Code+Pro:wght@200&display=swap');
html {
  min-height: 100%;
  overflow: hidden;
}

body {
  height: calc(100vh - 8em);
  padding: 0;
  margin: 0;
  color: #FFF;
  font-family: 'Courier Prime', monospace;
  background-color: rgb(0, 0, 0);
}

.video-bg {
  position: absolute;
  top: 0;
  left: 0;
  min-width: 100%;
  min-height: 100%;
  opacity: .5;
}

.line {
  position: relative;
  top: 75%;
  width: 24em;
  margin: auto;
  border-right: 2px solid #FFF;
  font-size: 18px;
  text-align: center;
  white-space: nowrap;
  overflow: hidden;
  transform: translateY(-50);
}

.anim-typewriter {
  animation: typewriter 5s steps(50) 1s 1 normal both, blinkTextCursor 750ms steps(40) infinite normal;
}

@keyframes typewriter {
  from {
    width: 0;
  }
  to {
    width: 16em;
  }
}

@keyframes blinkTextCursor {
  from {
    border-right-color: transparent;
  }
  to {
    border-right-color: rgb(155, 211, 71);
  }
}

<p class="line anim-typewriter">Under construction...</p>