.feature-page-shell {
  gap: 22px;
}

.feature-topbar {
  position: sticky;
  top: 18px;
  z-index: 20;
}

.feature-nav {
  gap: 12px;
}

.feature-home-link {
  color: var(--muted);
  text-decoration: none;
  transition: color 180ms ease;
}

.feature-home-link:hover,
.feature-home-link[aria-current="page"] {
  color: var(--text-strong);
}

.feature-page-main {
  display: grid;
  gap: 18px;
}

.feature-hero,
.feature-section,
.feature-cta {
  padding: 28px;
  border-radius: 22px;
}

.feature-breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 22px;
  color: var(--muted);
  font-size: 0.92rem;
}

.feature-breadcrumbs a {
  color: inherit;
  text-decoration: none;
}

.feature-breadcrumbs a:hover {
  color: var(--text-strong);
}

.feature-breadcrumb-sep {
  opacity: 0.5;
}

.feature-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(360px, 0.98fr);
  gap: 22px;
  align-items: start;
}

.feature-hero-copy h1,
.feature-section-copy h2,
.feature-cta-copy h2 {
  margin: 10px 0 14px;
  color: var(--text-strong);
  font-size: clamp(2rem, 3.2vw, 3rem);
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.feature-section-copy h2,
.feature-cta-copy h2 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
}

.feature-lead,
.feature-hero-media p,
.feature-step-card p,
.feature-detail-card p,
.feature-faq-card p,
.feature-point-list li,
.feature-cta-copy p {
  color: var(--muted);
  line-height: 1.7;
}

.feature-check-list {
  margin-top: 22px;
}

.feature-check-list li {
  font-size: 0.98rem;
}

.feature-actions {
  margin-top: 24px;
}

.feature-hero-media {
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.05);
}

.feature-hero-media img {
  width: 100%;
  display: block;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.feature-hero-media figcaption {
  margin-top: 16px;
}

.feature-hero-media strong {
  display: block;
  color: var(--text-strong);
  font-size: 1rem;
  margin-bottom: 8px;
}

.feature-detail-grid,
.feature-step-grid,
.feature-faq-grid,
.feature-related-grid {
  display: grid;
  gap: 14px;
}

.feature-detail-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-step-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-faq-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-related-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: 20px;
}

.feature-detail-card,
.feature-step-card,
.feature-faq-card,
.feature-related-link {
  padding: 18px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.feature-step-card {
  position: relative;
  padding-top: 20px;
}

.feature-step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  margin-bottom: 14px;
  border-radius: 999px;
  border: 1px solid rgba(83, 193, 129, 0.24);
  background: rgba(83, 193, 129, 0.1);
  color: var(--text-strong);
  font-family: var(--mono);
  font-size: 0.86rem;
  font-weight: 700;
}

.feature-step-card h3,
.feature-faq-card h3,
.feature-related-link strong {
  margin: 0 0 10px;
  color: var(--text-strong);
  font-size: 1.06rem;
  letter-spacing: -0.03em;
}

.feature-two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.feature-point-list {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 12px;
}

.feature-related-link {
  display: grid;
  gap: 8px;
  color: inherit;
  text-decoration: none;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.feature-related-link span {
  color: var(--muted);
  font-size: 0.92rem;
}

.feature-related-link:hover {
  border-color: rgba(83, 193, 129, 0.22);
  background: rgba(83, 193, 129, 0.08);
  transform: translateY(-2px);
}

.feature-footer {
  margin-top: 0;
}

html[data-theme="light"] .feature-hero-media,
html[data-theme="light"] .feature-detail-card,
html[data-theme="light"] .feature-step-card,
html[data-theme="light"] .feature-faq-card,
html[data-theme="light"] .feature-related-link {
  background: rgba(255, 255, 255, 0.88);
}

html[data-theme="light"] .feature-step-index {
  background: rgba(83, 193, 129, 0.12);
}

@media (max-width: 1100px) {
  .feature-hero-grid,
  .feature-two-column,
  .feature-detail-grid,
  .feature-step-grid,
  .feature-faq-grid,
  .feature-related-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .feature-topbar {
    position: static;
  }

  .feature-hero,
  .feature-section,
  .feature-cta {
    padding: 22px;
    border-radius: 18px;
  }

  .feature-nav {
    display: none;
  }

  .feature-check-list {
    margin-top: 18px;
  }
}