/* ---------- AI + Human ---------- */
.ai-human { background: var(--white); padding: 5.5rem 0; }
.ai-inner { max-width: 1100px; margin: 0 auto; padding: 0 1.5rem; }

.ai-heading {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 2.3vw + 1rem, 2.45rem);
  color: var(--navy-900);
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.2rem;
}

.ai-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.ai-stage {
  flex: 1 1 190px;
  max-width: 220px;
  border-radius: 14px;
  padding: 1.4rem 1.2rem;
  border: 1px solid var(--line);
  background: var(--mist);
}
.ai-stage-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.02rem;
  margin: 0 0 0.8rem;
  color: var(--navy-900);
}
.ai-stage-items { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.45rem; }
.ai-stage-items li {
  font-size: 0.85rem;
  color: var(--navy-500);
  padding-left: 0.9rem;
  position: relative;
}
.ai-stage-items li::before {
  content: '';
  position: absolute;
  left: 0; top: 0.5em;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--green-600);
}

.ai-stage-ai { border-color: rgba(90,160,44,0.35); }
.ai-stage-human { background: var(--navy-700); border-color: var(--navy-700); }
.ai-stage-human .ai-stage-title,
.ai-stage-human .ai-stage-items li { color: var(--white); }
.ai-stage-human .ai-stage-items li::before { background: var(--green-500); }

.ai-stage-client { border-style: dashed; }
.ai-stage-execute {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--green-600);
  border-color: var(--green-600);
}
.ai-stage-execute .ai-stage-title { color: var(--white); margin: 0; }

.ai-arrow {
  display: flex;
  align-items: center;
  color: var(--navy-500);
  flex: 0 0 auto;
}

.ai-caption {
  max-width: 640px;
  margin: 2.8rem auto 0;
  text-align: center;
  font-size: 0.98rem;
  line-height: 1.6;
  color: var(--navy-500);
}

@media (max-width: 860px) {
  .ai-flow { flex-direction: column; align-items: center; }
  .ai-stage { max-width: 320px; width: 100%; }
  .ai-arrow { transform: rotate(90deg); }
}