.pintro { background: var(--c-light); padding: var(--sec-pad) 0; }
.pintro__grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: stretch;
}

.pintro__aside { display: flex; flex-direction: column; }
.pintro__title {
  margin: 0;
  font-family: var(--f-body);
  font-weight: 500;
  text-transform: none;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.12;
  letter-spacing: 0;
  color: var(--c-dark);
}
.pintro__media { margin-top: clamp(1.75rem, 3.5vw, 2.75rem); }
.pintro__media img { width: 100%; height: auto; display: block; }
.pintro__note {
  margin: 0;
  padding-top: clamp(2.4rem, 4.5vw, 3.5rem);
  max-width: 34ch;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--c-body);
}

.acc__item {
  border-top: 1px solid var(--c-line);
  transition: background var(--dur) var(--ease);
}
.acc__item:first-child { border-top: none; }
.acc__head {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem;
  padding: clamp(1.1rem, 2.6vh, 1.7rem) 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  color: var(--c-dark);
}
.acc__title {
  font-family: var(--f-display);
  font-weight: 600;
  font-size: clamp(1.5rem, 2.6vw, 2rem);
  line-height: 1.05;
  color: inherit;
}

.acc__icon { position: relative; width: 22px; height: 22px; flex: none; color: inherit; }
.acc__icon::before, .acc__icon::after {
  content: ''; position: absolute; background: currentColor;
}
.acc__icon::before { left: 0; right: 0; top: 50%; height: 2px; margin-top: -1px; }
.acc__icon::after {
  top: 0; bottom: 0; left: 50%; width: 2px; margin-left: -1px;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.acc__item.is-open .acc__icon::after { opacity: 0; transform: scaleY(0); }

.acc__panel {
  overflow: hidden;
  max-height: 0;
  opacity: 0;
  transition: max-height 0.45s var(--ease), opacity 0.35s var(--ease);
}

.acc__item.is-open .acc__panel { max-height: 34rem; opacity: 1; }
.acc__sub {
  margin: 0 0 0.75rem;
  font-family: var(--f-body);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0;
  color: var(--c-primary);
}
.acc__body {
  margin: 0 0 clamp(1.2rem, 3vh, 1.75rem);
  max-width: 60ch;
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  line-height: 1.6;
  color: var(--c-body);
}

.acc__item.is-open .acc__sub { color: var(--c-primary); }

@media (max-width: 960px) {
  .pintro__grid { grid-template-columns: 1fr; gap: clamp(2rem, 7vw, 3rem); align-items: start; }
  .pintro__note { margin-top: clamp(1.25rem, 4vw, 2rem); }
}

.pf-aem { transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), visibility 0.4s var(--ease); }
.pf-aem.is-tucked { opacity: 0; visibility: hidden; transform: translateY(-8px); pointer-events: none; }
.pwhy { background: var(--c-light); }

@media (min-width: 1021px) {
  .portfolio--hero-handoff { position: relative; z-index: 2; }
  .portfolio--hero-handoff.is-hero-handoff .portfolio__sticky { overflow: visible; }
  .portfolio--hero-handoff .portfolio__stage--desktop .portfolio__frame {
    transform: translate3d(0, var(--portfolio-hero-shift, 0px), 0);
    will-change: transform;
  }
  .portfolio--hero-handoff .portfolio__head,
  .portfolio--hero-handoff .portfolio__toggle {
    opacity: 1;
    visibility: visible;
    transform: none;
    transition: opacity 0.4s var(--ease), transform 0.4s var(--ease), visibility 0.4s var(--ease);
  }
  .portfolio--hero-handoff.is-hero-handoff .portfolio__head,
  .portfolio--hero-handoff.is-hero-handoff .portfolio__toggle {
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    pointer-events: none;
  }
}

.portfolio-backtotop {
  position: fixed;
  right: clamp(1rem, 3vw, 2rem);
  bottom: clamp(1rem, 3vw, 2rem);
  z-index: 60;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  background: var(--c-medium);
  color: var(--c-light);
  box-shadow: 0 6px 20px rgba(24, 15, 20, 0.22);
  opacity: 0;
  transform: translateY(12px) scale(0.9);
  pointer-events: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.portfolio-backtotop.is-visible { opacity: 1; transform: none; pointer-events: auto; }
.portfolio-backtotop:hover { background: var(--c-primary); }
.portfolio-backtotop svg { width: 22px; height: 22px; transform: rotate(-90deg); }
@media (prefers-reduced-motion: reduce) {
  .portfolio-backtotop { transition: opacity var(--dur) var(--ease); transform: none; }
  .portfolio-backtotop.is-visible { transform: none; }
}