.page-faq {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  padding-top: calc(var(--header-h) + clamp(18px, 4vw, 34px));
  padding-bottom: clamp(56px, 9vw, 104px);
  overflow-x: hidden;
}

.page-faq .faq-inner {
  width: 100%;
  max-width: var(--shell-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- breadcrumb ---------- */
.page-faq .breadcrumb {
  max-width: var(--shell-max);
  margin: 0 auto clamp(20px, 4vw, 34px);
  padding: 0 var(--gutter);
}
.page-faq .breadcrumb ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-2);
}
.page-faq .breadcrumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--line);
}
.page-faq .breadcrumb a {
  color: var(--ink-2);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-faq .breadcrumb a:hover {
  color: var(--ink);
  border-bottom-color: var(--summer);
}

/* ---------- masthead ---------- */
.page-faq .faq-masthead {
  position: relative;
  padding-bottom: clamp(32px, 6vw, 56px);
  border-bottom: 1px solid var(--line);
}
.page-faq .faq-masthead::after {
  content: "";
  position: absolute;
  left: var(--gutter);
  bottom: -1px;
  width: min(220px, 40%);
  height: 2px;
  background: linear-gradient(90deg, var(--spring), var(--summer), var(--autumn), var(--winter));
}
.page-faq .faq-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--summer-ink);
}
.page-faq .faq-title {
  margin: 0 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 60px);
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--ink);
  max-width: 18em;
}
.page-faq .faq-lead {
  margin: 0 0 clamp(26px, 5vw, 38px);
  max-width: 44em;
  font-size: clamp(15px, 2.1vw, 17px);
  line-height: 1.9;
  color: var(--ink-2);
}

.page-faq .faq-stats {
  list-style: none;
  margin: 0 0 clamp(24px, 4vw, 34px);
  padding: 0;
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.page-faq .faq-stat {
  min-width: 0;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--summer);
  border-radius: 2px;
}
.page-faq .faq-stat:nth-child(1) { border-left-color: var(--spring); }
.page-faq .faq-stat:nth-child(2) { border-left-color: var(--summer); }
.page-faq .faq-stat:nth-child(3) { border-left-color: var(--autumn); }
.page-faq .faq-stat-num {
  display: block;
  font-size: clamp(26px, 5vw, 34px);
  line-height: 1.1;
  color: var(--ink);
  letter-spacing: -.02em;
}
.page-faq .faq-stat-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-2);
}

.page-faq .faq-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.page-faq .faq-jump-link {
  display: inline-block;
  padding: 7px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-2);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
  transition: color 160ms var(--ease), border-color 160ms var(--ease), background 160ms var(--ease);
}
.page-faq .faq-jump-link:hover,
.page-faq .faq-jump-link:focus-visible {
  color: var(--paper);
  background: var(--summer-ink);
  border-color: var(--summer-ink);
}

/* ---------- section frame ---------- */
.page-faq .faq-section {
  padding-top: clamp(44px, 8vw, 78px);
}
.page-faq .faq-head {
  display: grid;
  gap: 12px;
  margin-bottom: clamp(26px, 5vw, 40px);
}
.page-faq .section-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mark);
}
.page-faq .faq-head-text h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 4.2vw, 32px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-faq .faq-head-text p {
  margin: 0;
  max-width: 46em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-2);
}

/* ---------- topics ---------- */
.page-faq .topic-split {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
  grid-template-columns: 1fr;
}

.page-faq .topic-index {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-top: 3px solid var(--summer);
  padding: 18px 18px 14px;
}
.page-faq .topic-index-title {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--ink-2);
}
.page-faq .topic-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}
.page-faq .idx-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) auto;
  align-items: center;
  gap: 8px;
  padding: 9px 8px;
  border-radius: 2px;
  transition: background 160ms var(--ease);
}
.page-faq .idx-item:hover { background: rgba(91, 143, 168, .08); }
.page-faq .idx-num {
  font-size: 11px;
  letter-spacing: .06em;
  color: var(--ink-2);
}
.page-faq .idx-item a {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}
.page-faq .idx-item a:hover { border-bottom-color: currentColor; }
.page-faq .idx-count {
  font-size: 11px;
  color: var(--ink-2);
}
.page-faq .idx-spring { box-shadow: inset 3px 0 0 var(--spring); }
.page-faq .idx-summer { box-shadow: inset 3px 0 0 var(--summer); }
.page-faq .idx-autumn { box-shadow: inset 3px 0 0 var(--autumn); }
.page-faq .idx-winter { box-shadow: inset 3px 0 0 var(--winter); }

.page-faq .topic-detail { min-width: 0; }
.page-faq .topic-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
.page-faq .topic-card {
  min-width: 0;
  padding: 16px 18px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  box-shadow: var(--shadow-soft);
}
.page-faq .topic-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}
.page-faq .topic-card h3::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}
.page-faq .topic-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .t-spring h3::before { background: var(--spring); }
.page-faq .t-summer h3::before { background: var(--summer); }
.page-faq .t-autumn h3::before { background: var(--autumn); }
.page-faq .t-winter h3::before { background: var(--winter); }
.page-faq .t-spring { border-top: 2px solid rgba(217, 140, 154, .5); }
.page-faq .t-summer { border-top: 2px solid rgba(91, 143, 168, .5); }
.page-faq .t-autumn { border-top: 2px solid rgba(208, 138, 78, .5); }
.page-faq .t-winter { border-top: 2px solid rgba(127, 166, 160, .55); }

.page-faq .topic-figure { margin: clamp(20px, 4vw, 28px) 0 0; }
.page-faq .media-frame {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line-soft);
}
.page-faq .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-faq .media-frame--wide img { aspect-ratio: 2 / 1; }
.page-faq .media-caption {
  display: block;
  padding: 9px 12px;
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-2);
  border-top: 1px solid var(--line-soft);
  background: var(--paper);
}

/* ---------- answers ---------- */
.page-faq .faq-section--answers .faq-head-text h2 { color: var(--ink); }
.page-faq .qa-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: 1fr;
}
.page-faq .qa-item {
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
  transition: border-color 160ms var(--ease);
}
.page-faq .qa-item[open] {
  border-color: var(--line);
  box-shadow: var(--shadow-soft);
}
.page-faq .qa-item summary {
  position: relative;
  padding: 15px 44px 15px 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}
.page-faq .qa-item summary::-webkit-details-marker { display: none; }
.page-faq .qa-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--summer-ink);
  transition: transform 180ms var(--ease);
}
.page-faq .qa-item[open] summary::after { content: "−"; }
.page-faq .qa-item summary:focus-visible {
  outline: 2px solid var(--mark);
  outline-offset: -2px;
}
.page-faq .qa-body {
  padding: 0 16px 16px;
  border-top: 1px solid var(--line-soft);
}
.page-faq .qa-body p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}
.page-faq .qa-body p:first-child {
  color: var(--ink);
  font-weight: 600;
}
.page-faq .qa-link {
  display: inline-block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--autumn-ink);
  text-decoration: none;
  border-bottom: 1px solid var(--autumn);
  padding-bottom: 1px;
}
.page-faq .qa-link:hover { color: var(--mark); border-bottom-color: var(--mark); }

/* ---------- updates ---------- */
.page-faq .version-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: 1fr;
}
.page-faq .version-card {
  min-width: 0;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-radius: 2px;
}
.page-faq .version-card--current { border-top: 3px solid var(--mark); }
.page-faq .version-card--prev {
  border-top: 3px solid var(--winter);
  background: rgba(127, 166, 160, .06);
}
.page-faq .version-card-head {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.page-faq .v-tag {
  display: inline-block;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: .08em;
  border-radius: 2px;
}
.page-faq .v-tag--now {
  background: var(--mark);
  color: var(--paper);
}
.page-faq .v-tag--old {
  background: transparent;
  color: var(--winter-ink);
  border: 1px solid var(--winter);
}
.page-faq .v-name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}
.page-faq .v-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}
.page-faq .v-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-2);
}
.page-faq .v-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 6px;
  height: 1px;
  background: var(--line);
}
.page-faq .version-card--current .v-list li::before { background: var(--mark); }

.page-faq .diff-strip {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-faq .diff-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 12px 4px;
  border-bottom: 1px dashed var(--line-soft);
}
.page-faq .diff-row:last-child { border-bottom: 0; }
.page-faq .diff-key {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}
.page-faq .diff-from {
  font-size: 12px;
  color: var(--ink-2);
  text-decoration: line-through;
  text-decoration-color: var(--line);
}
.page-faq .diff-arrow {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--line);
}
.page-faq .diff-to {
  font-size: 12px;
  color: var(--mark);
  letter-spacing: .02em;
}

.page-faq .update-foot {
  display: grid;
  gap: clamp(16px, 3vw, 24px);
  grid-template-columns: 1fr;
  margin-top: clamp(22px, 4vw, 32px);
  align-items: center;
}
.page-faq .update-figure { margin: 0; }
.page-faq .update-actions p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-2);
}
.page-faq .update-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- support ---------- */
.page-faq .support-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: 1fr;
}
.page-faq .support-card {
  min-width: 0;
  padding: 20px;
  background: var(--paper);
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--spring);
  border-radius: 2px;
}
.page-faq .support-card:nth-child(2) { border-left-color: var(--summer); }
.page-faq .support-card:nth-child(3) { border-left-color: var(--autumn); }
.page-faq .support-key {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--ink-2);
}
.page-faq .support-val {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  word-break: break-word;
}
.page-faq .support-val a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}
.page-faq .support-val a:hover {
  color: var(--mark);
  border-bottom-color: var(--mark);
}
.page-faq .support-desc {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-2);
}

.page-faq .support-foot {
  margin-top: clamp(20px, 4vw, 30px);
  padding-top: clamp(18px, 3vw, 24px);
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  justify-content: space-between;
}
.page-faq .support-foot p {
  margin: 0;
  max-width: 40em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-2);
}

/* ---------- buttons (scoped tweaks) ---------- */
.page-faq .btn {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  display: inline-block;
  padding: 11px 22px;
  border-radius: 2px;
  border: 1px solid transparent;
  transition: background 160ms var(--ease), color 160ms var(--ease), border-color 160ms var(--ease);
}
.page-faq .btn--solid {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}
.page-faq .btn--solid:hover {
  background: var(--mark);
  border-color: var(--mark);
}
.page-faq .btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.page-faq .btn--ghost:hover {
  border-color: var(--summer);
  color: var(--summer-ink);
}

/* ---------- reveal ---------- */
.page-faq [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 300ms var(--ease), transform 300ms var(--ease);
}
.page-faq [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- responsive ---------- */
@media (min-width: 620px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }
  .page-faq .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .support-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-faq .diff-row {
    grid-template-columns: minmax(120px, 0.8fr) minmax(0, 1fr) 24px minmax(0, 1.2fr);
    align-items: center;
    gap: 10px;
  }
}

@media (min-width: 860px) {
  .page-faq .faq-head {
    grid-template-columns: 64px minmax(0, 1fr);
    align-items: start;
    gap: 20px;
  }
  .page-faq .qa-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
  .page-faq .version-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }
  .page-faq .update-foot {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  }
  .page-faq .support-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .page-faq .topic-split {
    grid-template-columns: minmax(240px, 300px) minmax(0, 1fr);
    align-items: start;
    gap: 32px;
  }
  .page-faq .topic-index {
    position: sticky;
    top: calc(var(--header-h) + 20px);
  }
  .page-faq .topic-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  .page-faq .qa-item summary::after,
  .page-faq .faq-jump-link,
  .page-faq .btn {
    transition: none;
  }
}