.page-faq {
  --faq-sidebar: 264px;
  --faq-card-bg: rgba(26, 58, 110, 0.5);
  position: relative;
  font-family: var(--font-body);
  color: var(--text);
  overflow-x: hidden;
}

.page-faq *,
.page-faq *::before,
.page-faq *::after {
  box-sizing: border-box;
}

.page-faq a:focus-visible,
.page-faq summary:focus-visible,
.page-faq .copy-chip:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* hero */
.page-faq__hero {
  position: relative;
  margin-top: calc(var(--header-h) * -1);
  padding: calc(var(--header-h) + 56px) 20px 48px;
  background: linear-gradient(120deg, #0b1d3a 0%, #142c54 55%, #1a3a6e 100%);
  overflow: hidden;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.page-faq__hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
}

.page-faq__hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--purple) 60%, transparent 100%);
  opacity: 0.8;
}

.page-faq__hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-faq__hero-copy {
  min-width: 0;
}

.page-faq__hero-title {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.025em;
}

.page-faq__hero-lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-faq__hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-faq__hero-img {
  width: 260px;
  max-width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.32);
  object-fit: cover;
  justify-self: center;
}

/* main layout */
.page-faq__layout {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 36px 20px 72px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

/* sidebar */
.page-faq__sidebar {
  background: linear-gradient(180deg, rgba(26, 58, 110, 0.55), rgba(16, 24, 40, 0.74));
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 18px;
}

.page-faq__sidebar-title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.page-faq__cat-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-faq__cat-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid transparent;
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
}

.page-faq__cat-item:hover {
  background: rgba(166, 77, 244, 0.14);
  border-color: rgba(166, 77, 244, 0.32);
  transform: translateX(3px);
}

.page-faq__cat-icon {
  flex: none;
  color: var(--purple);
  transition: color 0.25s ease;
}

.page-faq__cat-item:hover .page-faq__cat-icon {
  color: var(--accent);
}

.page-faq__sidebar-related {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.page-faq__sidebar-subtitle {
  margin: 0;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--purple);
}

.page-faq__related-link {
  color: var(--text-dim);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.22);
  transition: color 0.25s ease, border-bottom-color 0.25s ease;
}

.page-faq__related-link:hover {
  color: var(--text);
  border-bottom-color: var(--accent);
}

/* content */
.page-faq__content {
  min-width: 0;
}

.page-faq__section {
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-faq__section-head {
  margin-bottom: 8px;
}

.page-faq__section-title {
  margin: 10px 0 8px;
  font-family: var(--font-head);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.page-faq__section-desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-dim);
}

/* groups */
.page-faq__group {
  scroll-margin-top: calc(var(--header-h) + 24px);
  margin-top: 30px;
}

.page-faq__group-title {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 21px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

.page-faq__group-title::after {
  content: "";
  height: 1px;
  flex: 1;
  min-width: 40px;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.24), transparent);
}

.page-faq__group-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 34px;
  padding: 0 9px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--accent), var(--purple));
  color: #ffffff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

/* accordion */
.page-faq__item {
  margin-bottom: 12px;
  background: var(--faq-card-bg);
  border: 1px solid var(--border);
  border-left: 3px solid transparent;
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.page-faq__item[open] {
  border-color: rgba(166, 77, 244, 0.6);
  border-left-color: var(--purple);
  background: rgba(26, 58, 110, 0.72);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

.page-faq__item-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.45;
  cursor: pointer;
  list-style: none;
  color: var(--text);
}

.page-faq__item-head::-webkit-details-marker {
  display: none;
}

.page-faq__item-head::marker {
  content: "";
}

.page-faq__item-head::after {
  content: "+";
  flex: none;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 106, 0, 0.18);
  color: var(--accent);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  transition: transform 0.35s ease, background 0.3s ease, color 0.3s ease;
}

.page-faq__item[open] .page-faq__item-head::after {
  transform: rotate(45deg);
  background: rgba(166, 77, 244, 0.26);
  color: var(--purple);
}

.page-faq__item-body {
  padding: 0 20px 20px;
  color: var(--text-dim);
  font-size: 16px;
  line-height: 1.78;
}

.page-faq__item-body p {
  margin: 0 0 10px;
}

.page-faq__item-body p:last-child {
  margin-bottom: 0;
}

.page-faq__inline-link {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq__inline-link:hover {
  color: var(--purple);
}

/* feedback */
.page-faq__feedback {
  margin-top: 46px;
}

.page-faq__feedback-frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 28px 24px;
  border-radius: 18px;
  border: 1px solid rgba(166, 77, 244, 0.32);
  background:
    radial-gradient(circle at 82% 24%, rgba(166, 77, 244, 0.24) 0%, transparent 48%),
    radial-gradient(circle at 6% 92%, rgba(255, 106, 0, 0.2) 0%, transparent 42%),
    linear-gradient(135deg, #1a3a6e 0%, #0b1d3a 60%, #101828 100%);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
  overflow: hidden;
}

.page-faq__feedback-frame::before,
.page-faq__feedback-frame::after {
  content: "";
  position: absolute;
  width: 46px;
  height: 46px;
  pointer-events: none;
  z-index: 2;
}

.page-faq__feedback-frame::before {
  top: 12px;
  left: 12px;
  border-top: 2px solid var(--accent);
  border-left: 2px solid var(--accent);
}

.page-faq__feedback-frame::after {
  right: 12px;
  bottom: 12px;
  border-right: 2px solid var(--purple);
  border-bottom: 2px solid var(--purple);
}

.page-faq__feedback-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 14px;
}

.page-faq__feedback-title {
  margin: 4px 0 0;
  font-family: var(--font-head);
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.16;
}

.page-faq__feedback-desc {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dim);
  max-width: 52ch;
}

.page-faq__feedback-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.page-faq__feedback-actions .btn {
  min-width: 0;
}

.page-faq__feedback-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 30px;
  margin-top: 10px;
  padding-top: 16px;
  border-top: 1px dashed rgba(255, 255, 255, 0.18);
  width: 100%;
}

.page-faq__stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-faq__stat-item .stat-number {
  font-family: var(--font-head);
  font-size: 28px;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--accent);
}

.page-faq__stat-item .stat-label {
  font-size: 13px;
  line-height: 1.4;
  color: var(--text-faint);
}

.page-faq__feedback-img {
  width: 100%;
  max-width: 600px;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.28);
  object-fit: cover;
}

/* contact */
.page-faq__contact {
  margin-top: 48px;
}

.page-faq__contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 20px;
}

.page-faq__contact-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background: rgba(16, 24, 40, 0.62);
  border: 1px solid var(--border);
  border-radius: 14px;
  transition: border-color 0.3s ease, transform 0.25s ease;
}

.page-faq__contact-card:hover {
  border-color: rgba(255, 106, 0, 0.5);
  transform: translateY(-2px);
}

.page-faq__contact-label {
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.page-faq__contact-card .copy-chip {
  margin-top: 2px;
}

.page-faq__contact-use {
  margin: 2px 0 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text-faint);
}

.page-faq__contact-note {
  margin: 20px 0 0;
  padding: 14px 16px;
  border-left: 3px solid var(--purple);
  border-radius: 0 10px 10px 0;
  background: rgba(166, 77, 244, 0.08);
  color: var(--text-dim);
  font-size: 14px;
  line-height: 1.75;
}

/* media queries */
@media (min-width: 640px) {
  .page-faq__contact-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 768px) {
  .page-faq__hero {
    padding: calc(var(--header-h) + 64px) 32px 56px;
  }

  .page-faq__hero-inner {
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
  }

  .page-faq__hero-img {
    width: 300px;
    justify-self: end;
  }

  .page-faq__cat-nav {
    flex-direction: column;
    flex-wrap: nowrap;
  }

  .page-faq__cat-item {
    width: 100%;
  }

  .page-faq__layout {
    padding: 44px 32px 80px;
  }

  .page-faq__feedback-frame {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    padding: 32px 28px;
  }

  .page-faq__feedback-img {
    justify-self: end;
  }
}

@media (min-width: 1024px) {
  .page-faq__layout {
    grid-template-columns: var(--faq-sidebar) minmax(0, 1fr);
    align-items: start;
    gap: 36px;
  }

  .page-faq__sidebar {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq__cat-item,
  .page-faq__contact-card,
  .page-faq__item,
  .page-faq__item-head::after,
  .page-faq__item[open] .page-faq__item-head::after {
    transition: none;
  }
}