.portfolio { padding-bottom:0; }
.about-footer { margin-top:40px; position:relative; z-index:1; }
.about-landscape {
  width:100%;
  height:clamp(240px,34vw,520px);
  margin-top:-12px;
  background:url("assets/river-white.png") center bottom / contain no-repeat;
  mask-image:linear-gradient(to bottom,transparent,#000 14%,#000 88%,transparent);
  pointer-events:none;
}
@media(max-width:600px) {
  .about-landscape { height:clamp(140px,34vw,230px); margin-top:0; }
}