.page {
  overflow: hidden;
}

.hero-section,
.sub-hero {
  padding: 100px 0 72px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  align-items: center;
  gap: 54px;
}

.hero-copy h1,
.sub-hero h1 {
  max-width: 780px;
  font-size: 42px; /* iOS 13.0-13.3 兜底：不支持 clamp() */
  font-size: clamp(42px, 7vw, 82px);
  line-height: 0.98;
  letter-spacing: -0.06em;
}

.hero-desc,
.sub-hero p:last-child {
  max-width: 650px;
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

/* [gap-fallback:iOS13] .hero-actions（wrap 场景用均分法） */
.hero-actions > * { margin: 7px; }
@supports (inset-inline: 0) {
  .hero-actions { gap: 14px; }
  .hero-actions > * { margin: 0; }
}

.feature-section,
.workflow-section {
  padding: 70px 0 100px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.feature-card,
.workflow-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow-card);
}

.feature-card {
  min-height: 260px;
  padding: 28px;
}

.feature-index {
  display: inline-flex;
  margin-bottom: 36px;
  color: var(--color-primary);
  font-weight: 800;
}

.feature-card h3,
.workflow-item h3 {
  margin-bottom: 12px;
  font-size: 24px;
  line-height: 1.2;
}

.feature-card p,
.workflow-item p {
  color: var(--color-muted);
}

.workflow-list {
  display: grid;
  gap: 18px;
}

.workflow-item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 22px;
  padding: 24px;
}

.workflow-item > span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #03131a;
  font-weight: 900;
}

@media (max-width: 900px) {
  .hero-grid,
  .feature-grid {
    grid-template-columns: 1fr;
  }
}