.section {
  padding: 72px 0;
  scroll-margin-top: calc(var(--header-h) + 12px);
}

.section-hero {
  padding: 32px 0 48px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.hero-grid {
  display: grid;
  gap: 40px;
}

.eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.section-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  font-weight: 700;
  margin-bottom: 16px;
}

.hero-copy .lead {
  margin-bottom: 28px;
  max-width: 42rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-visual {
  position: relative;
}

.product-frame {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: 10px;
  overflow: hidden;
}

.product-frame img {
  width: 100%;
  height: auto;
}

.product-frame-mobile {
  display: none;
}

.section-trust {
  padding: 28px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.trust-title {
  font-weight: 600;
  margin-bottom: 14px;
}

.trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.trust-list li {
  position: relative;
  padding-left: 18px;
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.trust-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 1px;
  background: var(--color-green);
}

.section-problem {
  background: var(--color-surface);
}

.split {
  display: grid;
  gap: 32px;
}

.problem-list {
  margin-top: 20px;
  display: grid;
  gap: 10px;
}

.problem-list li {
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.problem-solution {
  padding: 24px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-blue);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.kicker {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-blue);
  margin-bottom: 8px;
}

.problem-solution h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  margin-bottom: 10px;
}

.problem-solution p {
  color: var(--color-text-muted);
}

.section-benefits {
  background: var(--color-bg);
}

.benefit-grid {
  display: grid;
  gap: 16px;
}

.benefit-card {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 22px 20px;
}

.benefit-card h3 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.benefit-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.section-product {
  background: var(--color-surface);
}

.product-showcase {
  display: grid;
  gap: 16px;
}

.showcase-main,
.showcase-side figure {
  border: 1px solid var(--color-line);
  border-radius: 10px;
  overflow: hidden;
  background: var(--color-bg);
}

.showcase-main img,
.showcase-side img {
  width: 100%;
}

.product-showcase figcaption {
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-line);
  background: var(--color-surface);
}

.showcase-side {
  display: grid;
  gap: 16px;
}

.product-points {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.product-points li {
  display: grid;
  gap: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
}

.product-points strong {
  font-size: 0.95rem;
}

.product-points span {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.section-monetize {
  background: var(--color-bg);
}

.flow {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.flow li {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.flow-label {
  display: block;
  font-weight: 700;
  margin-bottom: 4px;
}

.flow p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

.note {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 720px;
}

.section-how {
  background: var(--color-surface);
}

.steps {
  display: grid;
  gap: 16px;
}

.steps li {
  padding: 8px 0 16px;
  border-bottom: 1px solid var(--color-line);
}

.step-num {
  display: block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-blue);
  margin-bottom: 6px;
}

.steps h3 {
  font-size: 1.1rem;
  margin-bottom: 6px;
}

.steps p {
  color: var(--color-text-muted);
}

.section-segments {
  background: var(--color-bg);
}

.segment-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.segment-grid li {
  padding: 8px 14px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  background: var(--color-surface);
  font-size: 0.92rem;
}

.section-commercial {
  background: var(--color-surface);
  text-align: center;
  border-top: 1px solid var(--color-line);
}

.section-commercial p {
  color: var(--color-text-muted);
  margin: 12px auto 24px;
}

.section-faq {
  background: var(--color-bg);
}

.faq-list {
  display: grid;
  gap: 8px;
}

.faq-list details {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 4px 16px 4px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  padding: 14px 0;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list details p {
  color: var(--color-text-muted);
  padding: 0 0 16px;
}

.section-final {
  background: var(--color-text);
  color: #fff;
  text-align: center;
}

.section-final h2 {
  color: #fff;
}

.section-final p {
  color: rgba(255, 255, 255, 0.78);
  margin: 12px auto 24px;
}

@media screen and (min-width: 768px) {
  .section {
    padding: 88px 0;
  }

  .hero-grid {
    grid-template-columns: 1fr 1.05fr;
    align-items: center;
    gap: 48px;
  }

  .hero-visual {
    min-height: 280px;
  }

  .product-frame-mobile {
    display: block;
    position: absolute;
    width: 28%;
    right: 12px;
    bottom: -18px;
    box-shadow: 0 8px 24px rgba(31, 43, 53, 0.12);
  }

  .split {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: start;
    gap: 48px;
  }

  .benefit-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .benefit-grid li:last-child {
    grid-column: span 2;
  }

  .product-showcase {
    grid-template-columns: 1.4fr 0.8fr;
  }

  .product-points {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px 32px;
  }

  .product-points li {
    border-top: 0;
    padding-top: 0;
  }

  .flow {
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
  }

  .steps {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 32px;
  }

  .steps li {
    border-bottom: 0;
    padding: 0;
  }
}

@media screen and (min-width: 1100px) {
  .benefit-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .benefit-grid li:last-child {
    grid-column: auto;
  }

  .steps {
    grid-template-columns: repeat(4, 1fr);
  }
}