.page-faq {
  --faq-accent-soft: rgba(139, 0, 0, 0.05);
  --faq-gold-soft: rgba(218, 165, 32, 0.14);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(var(--faq-accent-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-accent-soft) 1px, transparent 1px);
  background-size: 36px 36px;
}

.page-faq__intro {
  padding: clamp(48px, 8vw, 96px) 0 clamp(32px, 5vw, 56px);
  border-bottom: 1px solid var(--color-line);
}

.page-faq__intro-copy {
  max-width: 760px;
}

.page-faq__intro-copy .section-label {
  margin-bottom: 16px;
}

.page-faq__title {
  font-family: var(--font-display);
  font-size: clamp(2.375rem, 6vw, 4.25rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--color-brand);
  margin: 0 0 20px;
  max-width: 12em;
}

.page-faq__lead {
  font-family: var(--font-body);
  font-size: clamp(1rem, 2vw, 1.1875rem);
  line-height: 1.75;
  color: var(--color-muted);
  margin: 0;
  max-width: 46em;
}

.page-faq__intro-grid {
  display: grid;
  gap: 36px;
  margin-top: 44px;
}

.page-faq__quick-index {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--color-line);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow);
}

.page-faq__quick-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 18px 16px;
  background: var(--color-bg);
  text-decoration: none;
  color: var(--color-ink);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq__quick-item:hover {
  background: var(--color-bg-alt);
  color: var(--color-brand);
}

.page-faq__quick-seq {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1;
  color: var(--color-accent);
  background: var(--faq-gold-soft);
  padding: 6px 8px;
  border-left: 2px solid var(--color-accent);
}

.page-faq__quick-name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
}

.page-faq__quick-arrow {
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--color-steel);
  font-size: 0.9375rem;
}

.page-faq__grid {
  display: grid;
  gap: 44px;
}

.page-faq__grid--ios {
  align-items: start;
}

.page-faq__steps {
  list-style: none;
  margin: 36px 0 0;
  padding: 0;
}

.page-faq__step {
  display: flex;
  gap: 20px;
  padding: 26px 0;
  border-bottom: 1px solid var(--color-line);
}

.page-faq__step:first-child {
  border-top: 1px solid var(--color-line);
}

.page-faq__step-seq {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-accent);
  flex: 0 0 auto;
  border-top: 2px solid var(--color-accent);
  padding-top: 6px;
  min-width: 2.5rem;
}

.page-faq__step-title {
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  margin: 0 0 8px;
  color: var(--color-ink);
}

.page-faq__step-desc {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-muted);
  margin: 0 0 10px;
  max-width: 54ch;
}

.page-faq__step-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-steel);
  text-decoration: none;
  border-bottom: 1px solid rgba(75, 110, 140, 0.35);
  transition: color 0.2s ease, border-bottom-color 0.2s ease;
}

.page-faq__step-link:hover {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
}

.page-faq__figure {
  margin: 0;
  align-self: start;
}

.page-faq__frame {
  border: 1px solid var(--color-line);
  background:
    linear-gradient(135deg, rgba(139, 0, 0, 0.05) 25%, transparent 25%) 0 0 / 16px 16px,
    linear-gradient(225deg, rgba(139, 0, 0, 0.05) 25%, transparent 25%) 0 0 / 16px 16px,
    var(--color-bg-alt);
  padding: 14px;
}

.page-faq__frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: contain;
}

.page-faq__figure-cap {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--color-muted);
  margin-top: 10px;
}

.page-faq__section--brand {
  position: relative;
}

.page-faq__section--brand .fold {
  background: rgba(255, 255, 255, 0.045);
  border-color: rgba(255, 255, 255, 0.18);
}

.page-faq__section--brand .fold-header {
  color: var(--color-on-dark);
}

.page-faq__section--brand .fold-index {
  color: var(--color-accent-light);
  background: rgba(232, 197, 107, 0.12);
  border-left-color: var(--color-accent-light);
}

.page-faq__section--brand .fold-header::after {
  color: var(--color-accent-light);
}

.page-faq__section--brand .fold-panel {
  color: rgba(248, 244, 240, 0.88);
}

.page-faq__section--brand .fold-panel a {
  color: var(--color-accent-light);
  border-bottom-color: rgba(232, 197, 107, 0.5);
}

.page-faq__section--brand .section-lead {
  color: rgba(248, 244, 240, 0.75);
}

.page-faq__faq-list {
  margin-top: 44px;
  border-top: 1px solid var(--color-line);
}

.page-faq .fold {
  border: 1px solid var(--color-line);
  border-top: 0;
  background: var(--color-bg);
  transition: background-color 0.2s ease;
}

.page-faq .fold-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 18px;
  cursor: pointer;
  list-style: none;
  text-decoration: none;
}

.page-faq .fold-header::-webkit-details-marker {
  display: none;
}

.page-faq .fold-header::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--color-accent);
  border: 1px solid var(--color-line);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.page-faq .fold[open] > .fold-header::after {
  content: "−";
  background: var(--color-brand);
  border-color: var(--color-brand);
  color: var(--color-on-dark);
}

.page-faq .fold-index {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.05em;
  line-height: 1.4;
  color: var(--color-accent);
  background: var(--faq-gold-soft);
  border-left: 2px solid var(--color-accent);
  padding: 5px 9px;
  flex: 0 0 auto;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-faq .fold-header:hover .fold-index {
  background: rgba(218, 165, 32, 0.24);
}

.page-faq__fold-question {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  margin: 0;
  color: inherit;
  flex: 1 1 auto;
  min-width: 0;
}

.page-faq .fold-panel {
  padding: 6px 20px 24px;
  color: var(--color-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
  border-top: 1px dashed var(--color-line);
}

.page-faq .fold-panel p {
  margin: 0 0 12px;
  max-width: 68ch;
}

.page-faq .fold-panel p:last-child {
  margin-bottom: 0;
}

.page-faq .fold-panel a {
  color: var(--color-steel);
  text-decoration: none;
  border-bottom: 1px solid rgba(75, 110, 140, 0.4);
}

.page-faq .fold-panel a:hover {
  color: var(--color-brand);
  border-bottom-color: var(--color-brand);
}

.page-faq__section--ios {
  background: rgba(75, 110, 140, 0.05);
}

.page-faq__section--service {
  background: var(--color-bg-alt);
}

.page-faq__service-grid {
  display: grid;
  gap: 14px;
  margin-top: 44px;
}

.page-faq__contact-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-brand);
  padding: 24px 22px;
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-faq__contact-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}

.page-faq__contact-title {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin: 0 0 12px;
}

.page-faq__contact-value {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  line-height: 1.55;
  color: var(--color-ink);
  word-break: break-word;
  margin: 0 0 10px;
}

.page-faq__contact-note {
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--color-muted);
  margin: 0;
}

.page-faq__faq-list--service {
  margin-top: 32px;
}

.page-faq__service-more {
  margin-top: 28px;
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.page-faq__service-more a {
  color: var(--color-steel);
  text-decoration: none;
  border-bottom: 1px solid rgba(75, 110, 140, 0.4);
}

.page-faq__section--trust {
  background: var(--color-dark);
}

.page-faq__trust {
  display: flex;
  flex-direction: column;
  gap: 28px;
  align-items: flex-start;
}

.page-faq__section--trust .section-label {
  color: var(--color-accent-light);
}

.page-faq__trust-text {
  font-family: var(--font-body);
  font-size: clamp(1.125rem, 2.4vw, 1.5625rem);
  line-height: 1.7;
  color: var(--color-on-dark);
  margin: 0;
  max-width: 62ch;
}

.page-faq__trust .btn-primary {
  flex: 0 0 auto;
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-dark);
}

.page-faq__trust .btn-primary:hover {
  background: var(--color-accent-light);
  border-color: var(--color-accent-light);
}

@media (min-width: 720px) {
  .page-faq__service-grid {
    grid-template-columns: 1fr 1fr;
  }

  .page-faq .fold-panel {
    padding-left: calc(2rem + 16px);
  }
}

@media (min-width: 960px) {
  .page-faq__intro-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: end;
    gap: clamp(48px, 6vw, 96px);
  }

  .page-faq__grid--newcomer,
  .page-faq__grid--ios {
    grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr);
    gap: clamp(48px, 6vw, 88px);
  }

  .page-faq__grid--ios {
    grid-template-columns: minmax(0, 1.16fr) minmax(280px, 0.84fr);
  }

  .page-faq__grid--newcomer .page-faq__figure {
    margin-top: clamp(40px, 8vw, 96px);
  }

  .page-faq__grid--ios .page-faq__figure {
    margin-top: clamp(60px, 10vw, 120px);
    max-width: 380px;
  }

  .page-faq__trust {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 1100px) {
  .page-faq__service-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}