.page-faq .crumb-sep {
  margin: 0 .4rem;
  color: var(--muted);
}

/* ============ 首屏 ============ */
.page-faq .faq-hero {
  padding: clamp(1.5rem, 4vw, 2.75rem) 0 clamp(2rem, 5vw, 3.75rem);
  border-bottom: 2px solid var(--edge);
}

.page-faq .faq-switch-note {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin: 1.125rem 0 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .03em;
  color: var(--cyan);
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -.01em;
  color: var(--fg);
  margin: 1rem 0 1.125rem;
  max-width: 15ch;
}

.page-faq .faq-lede {
  max-width: 62ch;
  margin: 0 0 clamp(1.75rem, 4vw, 2.75rem);
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.78;
  color: var(--muted);
}

.page-faq .faq-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: start;
}

/* 问题编号索引 */
.page-faq .faq-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 2px solid var(--cyan-deep);
}

.page-faq .faq-index li {
  border-bottom: 1px solid var(--edge);
}

.page-faq .faq-index a {
  display: flex;
  align-items: baseline;
  gap: .875rem;
  padding: .8rem .25rem;
  color: var(--fg);
  text-decoration: none;
  transition: background var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-faq .faq-index a:hover,
.page-faq .faq-index a:focus-visible {
  background: rgba(0, 229, 208, .09);
  padding-left: .75rem;
}

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

.page-faq .faq-index-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-faq .faq-index-label {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: .01em;
}

/* 首条回答展开卡 */
.page-faq .faq-lead {
  background: var(--card);
  border: 2px solid var(--cyan);
  box-shadow: 8px 8px 0 0 rgba(0, 229, 208, .14);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-lead-mark {
  margin: 0 0 .75rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--alert);
}

.page-faq .faq-lead h2 {
  margin: 0 0 .875rem;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 3.2vw, 1.875rem);
  font-weight: 700;
  line-height: 1.25;
  color: var(--fg);
}

.page-faq .faq-lead p {
  margin: 0 0 .875rem;
  line-height: 1.78;
  color: var(--fg);
}

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

.page-faq .faq-lead a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-lead a:hover {
  color: var(--focus);
}

.page-faq .faq-lead-meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.125rem;
}

/* 首屏图 */
.page-faq .faq-hero-figure {
  margin: clamp(1.75rem, 4vw, 2.75rem) 0 0;
  border: 2px solid var(--edge);
  background: var(--ink-deep);
  overflow: hidden;
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 问答主体 ============ */
.page-faq .faq-body {
  padding: clamp(2.25rem, 6vw, 4.25rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-faq .faq-group {
  margin: 0 0 clamp(2.5rem, 6vw, 4rem);
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group-head {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .35rem 1rem;
  align-items: baseline;
  padding-bottom: .875rem;
  border-bottom: 2px solid var(--cyan-deep);
  margin-bottom: 1.25rem;
}

.page-faq .faq-group-num {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.3rem, 3.4vw, 2rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .01em;
  color: var(--fg);
}

.page-faq .faq-group-note {
  grid-column: 2;
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--muted);
}

/* 分组配图 */
.page-faq .faq-figure {
  margin: 0 0 1.5rem;
  border: 2px solid var(--edge);
  background: var(--ink-deep);
  overflow: hidden;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* 手风琴 */
.page-faq .faq-list {
  border-top: 1px solid var(--edge);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--edge);
  border-left: 3px solid transparent;
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-faq .faq-item[open] {
  border-left-color: var(--alert);
  background: rgba(255, 75, 43, .05);
}

.page-faq .faq-item summary {
  display: flex;
  align-items: baseline;
  gap: .75rem;
  padding: 1rem .75rem 1rem .875rem;
  cursor: pointer;
  list-style: none;
  transition: background var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: rgba(0, 229, 208, .07);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.25rem;
  line-height: 1;
  color: var(--cyan);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--alert);
}

.page-faq .faq-q-num {
  flex: none;
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
  padding-top: .2em;
}

.page-faq .faq-q-text {
  font-family: var(--font-head);
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
  font-weight: 600;
  line-height: 1.42;
  color: var(--fg);
}

.page-faq .faq-a {
  padding: .25rem 1rem 1.375rem 1rem;
  font-size: 1rem;
  line-height: 1.82;
  color: var(--muted);
}

.page-faq .faq-a p {
  margin: 0 0 .75rem;
}

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

.page-faq .faq-a a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-a a:hover {
  color: var(--focus);
}

.page-faq .faq-a .copy-btn {
  margin-top: .5rem;
}

/* ============ 收尾 ============ */
.page-faq .faq-outro {
  background: var(--cyan-deep);
  border-top: 2px solid var(--cyan);
  padding: clamp(2rem, 5vw, 3.25rem) 0;
}

.page-faq .faq-outro-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: center;
}

.page-faq .faq-outro-mark {
  margin: 0 0 .5rem;
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--amber);
}

.page-faq .faq-outro-title {
  margin: 0 0 .625rem;
  font-family: var(--font-head);
  font-size: clamp(1.4rem, 3.6vw, 2.125rem);
  font-weight: 700;
  line-height: 1.22;
  color: var(--paper);
}

.page-faq .faq-outro-text {
  margin: 0;
  line-height: 1.75;
  color: var(--paper);
  opacity: .86;
}

.page-faq .faq-outro-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

/* ============ 响应式 ============ */
@media (min-width: 720px) {
  .page-faq .faq-a {
    padding: .25rem 1.5rem 1.5rem 2.75rem;
  }

  .page-faq .faq-item summary {
    padding: 1.125rem 1.25rem 1.125rem 1.125rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-grid {
    grid-template-columns: minmax(0, .78fr) minmax(0, 1.22fr);
    gap: 2.75rem;
  }

  .page-faq .faq-hero-figure img {
    max-height: 420px;
  }

  .page-faq .faq-figure img {
    max-height: 360px;
  }

  .page-faq .faq-outro-inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, auto);
    gap: 2.5rem;
  }

  .page-faq .faq-outro-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-group-head {
    grid-template-columns: auto 1fr auto;
    align-items: end;
  }

  .page-faq .faq-group-note {
    grid-column: 3;
    align-self: end;
    padding-bottom: .35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}