.about{
  --headline-size:clamp(34px,4.6vw,60px);
  --nav-align:flex-start;
}
.about-intro{
  margin:0;
  font-size:var(--headline-size);
  line-height:1.1;
  letter-spacing:-.045em;
  text-wrap:pretty;
}
.about-sentence{display:block}
.about-sentence+.about-sentence{margin-top:.55em}
.about-intro .motion-line{display:block;white-space:nowrap}