.page-faq {
  --faq-gap: clamp(24px, 4vw, 44px);
  --faq-hair: 1px solid var(--line-soft);
  color: var(--frost);
}

/* ---------- Hero ---------- */

.page-faq .faq-hero {
  position: relative;
  padding: calc(var(--header-h) + 32px) 0 clamp(36px, 6vw, 68px);
  background:
    radial-gradient(92% 74% at 84% 4%, rgba(27, 39, 69, .95) 0%, rgba(7, 14, 31, 0) 64%),
    linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  border-bottom: var(--faq-hair);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line-gold), transparent);
}

.page-faq .faq-hero-grid {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(18px, 3vw, 34px);
}

.page-faq .faq-hero-text {
  min-width: 0;
}

.page-faq .faq-hero-text h1 {
  margin: 14px 0 18px;
  font-size: clamp(32px, 5.4vw, 54px);
  line-height: 1.12;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--frost);
}

.page-faq .faq-lead {
  max-width: 48ch;
  margin: 0;
  font-size: clamp(16px, 1.15vw, 17px);
  line-height: 1.85;
  color: var(--tile);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero-media {
  min-width: 0;
}

/* ---------- Body layout ---------- */

.page-faq .faq-body {
  display: grid;
  gap: clamp(28px, 4vw, 46px);
  padding-top: clamp(36px, 5vw, 64px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-faq .faq-main {
  min-width: 0;
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-faq .faq-index-list a {
  display: block;
  margin-left: -1px;
  padding: 7px 0 7px 14px;
  border-left: 2px solid transparent;
  font-size: 14px;
  line-height: 1.5;
  color: var(--tile-dim);
  text-decoration: none;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-faq .faq-index-list a:hover,
.page-faq .faq-index-list a:focus-visible {
  color: var(--gold);
  border-left-color: var(--gold);
  background: linear-gradient(90deg, rgba(245, 185, 74, .12), transparent 72%);
}

.page-faq .faq-index-list a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- Sections ---------- */

.page-faq .faq-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-faq .faq-main > .faq-section + .faq-section {
  margin-top: clamp(38px, 5vw, 64px);
  padding-top: clamp(30px, 4vw, 48px);
  border-top: var(--faq-hair);
}

.page-faq .faq-section h2 {
  margin: 10px 0 14px;
  font-size: clamp(23px, 3vw, 32px);
  line-height: 1.25;
  font-weight: 800;
  letter-spacing: -0.015em;
  color: var(--frost);
}

.page-faq .faq-intro {
  max-width: 64ch;
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--tile);
}

.page-faq .faq-main p a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .faq-main p a:hover,
.page-faq .faq-main p a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-soft);
}

.page-faq .faq-main p a:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* ---------- Step groups ---------- */

.page-faq .faq-step-groups {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}

.page-faq .step-group {
  padding: 20px 18px 16px;
  background: var(--ink-800);
  border: var(--faq-hair);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.page-faq .step-group h3 {
  margin: 0 0 14px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--gold);
}

.page-faq .step-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .step-list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 12px;
  bottom: 18px;
  width: 1px;
  background: linear-gradient(180deg, var(--line-gold), var(--line-soft) 72%, transparent);
}

.page-faq .step-item {
  position: relative;
}

.page-faq .step-item + .step-item {
  margin-top: 2px;
}

.page-faq .step-item summary {
  position: relative;
  list-style: none;
  padding: 7px 0 7px 34px;
  font-size: 15px;
  line-height: 1.55;
  font-weight: 600;
  color: var(--frost);
  cursor: pointer;
  transition: color .18s var(--ease);
}

.page-faq .step-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .step-item summary:hover {
  color: var(--gold-soft);
}

.page-faq .step-item summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .step-num {
  position: absolute;
  left: 0;
  top: 6px;
  width: 23px;
  height: 23px;
  display: grid;
  place-items: center;
  font-size: 11.5px;
  line-height: 1;
  color: var(--gold);
  background: var(--ink-900);
  border: 1px solid var(--line-gold);
  border-radius: 50%;
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}

.page-faq .step-item details[open] .step-num {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink-900);
}

.page-faq .step-extra {
  margin: 0 0 10px;
  padding-left: 34px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--tile-dim);
}

/* ---------- Records ---------- */

.page-faq .rec-grid {
  display: grid;
  gap: 22px;
  margin-top: 22px;
}

.page-faq .rec-media,
.page-faq .rec-body {
  min-width: 0;
}

.page-faq .rec-points {
  list-style: none;
  margin: 16px 0 18px;
  padding: 0;
}

.page-faq .rec-points li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--tile);
}

.page-faq .rec-points li + li {
  margin-top: 6px;
}

.page-faq .rec-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 9px;
  height: 1px;
  background: var(--gold);
}

.page-faq .rec-points strong {
  color: var(--frost);
  font-weight: 700;
}

.page-faq .rec-filter-label {
  margin: 0 0 12px;
  font-size: 14px;
  color: var(--tile-dim);
}

.page-faq .rec-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 34px;
}

.page-faq .filter-chip {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--gold-soft);
  background: var(--ink-700);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  transition: background .18s var(--ease), border-color .18s var(--ease);
}

.page-faq .filter-chip:hover {
  background: var(--ink-800);
  border-color: var(--gold);
}

.page-faq .filter-chip::after {
  content: attr(data-sample);
  position: absolute;
  left: 0;
  top: 100%;
  margin-top: 8px;
  padding: 5px 9px;
  white-space: nowrap;
  font-size: 12px;
  letter-spacing: .02em;
  color: var(--gold-soft);
  background: var(--ink-900);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  opacity: 0;
  transform: translateY(-4px);
  pointer-events: none;
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.page-faq .filter-chip:hover::after {
  opacity: 1;
  transform: translateY(0);
}

.page-faq .rec-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--tile-dim);
}

/* ---------- Devices ---------- */

.page-faq .bind-meter {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin: 20px 0 24px;
}

.page-faq .bind-cell {
  padding: 10px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  background: var(--ink-700);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
}

.page-faq .device-order {
  counter-reset: faq-do;
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-faq .device-order li {
  counter-increment: faq-do;
  position: relative;
  padding-left: 40px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--tile);
}

.page-faq .device-order li + li {
  margin-top: 10px;
}

.page-faq .device-order li::before {
  content: "0" counter(faq-do);
  position: absolute;
  left: 0;
  top: 2px;
  padding-bottom: 1px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--gold);
  border-bottom: 1px solid var(--line-gold);
}

/* ---------- Checklist ---------- */

.page-faq .checks {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-faq .check {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 0;
  border-bottom: var(--faq-hair);
}

.page-faq .check:first-child {
  border-top: var(--faq-hair);
}

.page-faq .check p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--tile);
}

.page-faq .check-mark {
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1;
  border-radius: 50%;
}

.page-faq .check--pass .check-mark {
  color: var(--signal);
  border: 1px solid rgba(63, 208, 201, .5);
  background: rgba(63, 208, 201, .08);
}

.page-faq .check--alert .check-mark {
  color: var(--brick);
  border: 1px solid rgba(201, 86, 60, .62);
  background: rgba(201, 86, 60, .1);
}

.page-faq .check--alert p {
  color: var(--frost);
}

/* ---------- Q&A ---------- */

.page-faq .qa-list {
  margin-top: 20px;
  border-top: var(--faq-hair);
}

.page-faq .qa-item {
  position: relative;
  border-bottom: var(--faq-hair);
}

.page-faq .qa-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gold);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform .28s var(--ease);
}

.page-faq .qa-item[open]::before {
  transform: scaleY(1);
}

.page-faq .qa-item summary {
  position: relative;
  list-style: none;
  padding: 16px 40px 16px 16px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--frost);
  cursor: pointer;
  transition: color .18s var(--ease), background .18s var(--ease);
}

.page-faq .qa-item summary::-webkit-details-marker {
  display: none;
}

.page-faq .qa-item summary::after {
  content: "+";
  position: absolute;
  right: 12px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--gold);
}

.page-faq .qa-item[open] summary::after {
  content: "–";
}

.page-faq .qa-item summary:hover {
  color: var(--gold-soft);
  background: linear-gradient(90deg, rgba(245, 185, 74, .08), transparent 70%);
}

.page-faq .qa-item summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.page-faq .qa-body {
  padding: 0 16px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--tile);
}

/* ---------- Content entries ---------- */

.page-faq .entry-grid {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
}

.page-faq .entry-card {
  display: block;
  padding: 18px 18px 20px;
  background: var(--ink-800);
  border: var(--faq-hair);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color .2s var(--ease), background .2s var(--ease), transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-faq .entry-card:hover {
  border-color: var(--line-gold);
  background: var(--ink-700);
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.page-faq .entry-card:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.page-faq .entry-no {
  display: block;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--gold);
}

.page-faq .entry-title {
  display: block;
  margin: 9px 0 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--frost);
}

.page-faq .entry-desc {
  display: block;
  font-size: 14px;
  line-height: 1.72;
  color: var(--tile-dim);
}

/* ---------- Help ---------- */

.page-faq .help-panel {
  display: grid;
  gap: 12px;
  margin: 20px 0;
}

.page-faq .help-item {
  padding: 16px 18px;
  background: var(--ink-800);
  border: var(--faq-hair);
  border-left: 2px solid var(--gold);
  border-radius: var(--radius);
}

.page-faq .help-label {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--tile-dim);
}

.page-faq .help-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.5;
  color: var(--gold-soft);
  word-break: break-all;
}

/* ---------- Responsive ---------- */

@media (min-width: 640px) {
  .page-faq .help-panel {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 700px) {
  .page-faq .entry-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}

@media (min-width: 780px) {
  .page-faq .faq-step-groups {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: 1.12fr .88fr;
    align-items: end;
    gap: clamp(28px, 4vw, 56px);
  }

  .page-faq .rec-grid {
    grid-template-columns: .85fr 1.15fr;
    align-items: start;
    gap: 30px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) 218px;
    gap: clamp(36px, 4vw, 60px);
  }

  .page-faq .faq-index {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }

  .page-faq .faq-main {
    grid-column: 1;
    grid-row: 1;
  }
}

@media (max-width: 520px) {
  .page-faq .bind-meter {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 4px;
  }

  .page-faq .bind-cell {
    font-size: 11px;
    padding: 8px 0;
  }

  .page-faq .filter-chip::after {
    white-space: normal;
    width: max-content;
    max-width: 240px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .entry-card,
  .page-faq .filter-chip::after,
  .page-faq .qa-item::before {
    transition: none;
  }

  .page-faq .entry-card:hover {
    transform: none;
  }
}