.expertise-hero { min-height: 65vh; }
.expertise-intro { padding: var(--spacing-v) 0; }
.expertise-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}
.expertise-intro-text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 20px;
}
.expertise-intro-img {
  aspect-ratio: 4/3;
  background: var(--color-light);
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: sticky;
  top: 90px;
}

/* Processus expertise (orange accent, gray bg) */
.expertise-processus {
  background: var(--color-secondary);
  padding: var(--spacing-v) 0;
}
.expertise-processus .section__title { margin-bottom: 64px; }
.expertise-steps {
  position: relative;
  padding-left: 88px;
}
.expertise-steps::before {
  content: '';
  position: absolute;
  left: 52px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--color-accent);
  opacity: 0.4;
}
.expertise-step {
  position: relative;
  margin-bottom: 56px;
}
.expertise-step:last-child { margin-bottom: 0; }
.expertise-step__number {
  position: absolute;
  left: -88px;
  top: 0;
  width: 40px;
  text-align: right;
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 300;
  color: var(--color-accent);
  line-height: 1;
}
.expertise-step__title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.expertise-step__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text);
  max-width: 560px;
}

.expertise-steps-wrap { max-width: 640px; margin: 0 auto; }

@media (max-width: 768px) {
  .expertise-intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .expertise-intro-img  { position: relative; top: 0; aspect-ratio: 16 / 9; }

  .expertise-steps      { padding-left: 56px; }
  .expertise-steps::before { left: 32px; }
  .expertise-step__number  { left: -56px; width: 24px; font-size: 20px; }
}