.page-faq {
  --faq-hair: rgba(167, 176, 192, 0.28);
  --faq-hair-paper: rgba(16, 20, 24, 0.14);
  --faq-glow: rgba(14, 124, 134, 0.07);
  --faq-warm-glow: rgba(242, 106, 61, 0.09);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  background-color: var(--c-indigo);
  color: var(--tx-dark);
  padding-block: clamp(1.5rem, 3vw, 2.25rem) clamp(2rem, 4vw, 3.5rem);
  border-bottom: 1px solid var(--faq-hair);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--faq-hair) 1px, transparent 1px),
    linear-gradient(90deg, var(--faq-hair) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.45;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 88%);
}

.page-faq .faq-hero > .wrap {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero .breadcrumb__list {
  margin-bottom: clamp(1.5rem, 3vw, 2.5rem);
}

.page-faq .faq-hero .breadcrumb__link {
  color: var(--tx-dark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-faq .faq-hero .breadcrumb__link:hover,
.page-faq .faq-hero .breadcrumb__link:focus-visible {
  color: var(--c-lake-light);
  border-bottom-color: var(--c-lake-light);
}

.page-faq .faq-hero .breadcrumb__sep,
.page-faq .faq-hero .breadcrumb__item--current {
  color: var(--tx-muted-dark);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
}

.page-faq .faq-hero__eyebrow {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--c-lake-light);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0.6rem 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.35rem, 7vw, 4.6rem);
  line-height: 1.04;
  letter-spacing: -0.01em;
  color: var(--tx-dark-strong);
}

.page-faq .faq-hero__lede {
  margin: 1.25rem 0 0;
  max-width: 56ch;
  font-size: clamp(1rem, 1.4vw, 1.125rem);
  line-height: 1.85;
  color: var(--tx-dark);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-faq .faq-hero__media {
  margin: 0;
  border-left: 3px solid var(--c-sunset);
  background-color: var(--c-panel);
}

.page-faq .faq-hero__media .media__caption {
  color: var(--tx-muted-dark);
}

.page-faq .faq-steps {
  list-style: none;
  margin: clamp(2rem, 4vw, 3.25rem) 0 0;
  padding: clamp(1.25rem, 2.5vw, 1.75rem) 0 0;
  border-top: 1px solid var(--faq-hair);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-faq .faq-steps__item {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  min-width: 0;
}

.page-faq .faq-steps__idx {
  flex: none;
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-sunset);
}

.page-faq .faq-steps__txt {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--tx-dark);
}

/* ---------- 问答主体 ---------- */

.page-faq .faq-body {
  background-color: var(--c-warm);
  color: var(--tx-paper);
  padding-block: clamp(2.5rem, 6vw, 5rem);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 4vw, 3.25rem);
}

.page-faq .faq-index {
  align-self: start;
}

.page-faq .faq-index__title {
  margin: 0 0 0.9rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--faq-hair-paper);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  color: var(--tx-muted-paper);
  text-transform: uppercase;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.7rem 0.9rem;
  border: 1px solid var(--faq-hair-paper);
  border-left: 3px solid transparent;
  background-color: transparent;
  color: var(--tx-paper);
  font-size: 0.9375rem;
  line-height: 1.5;
  text-decoration: none;
  transition:
    border-color var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    color var(--dur) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-left-color: var(--c-lake);
  background-color: var(--faq-glow);
  color: var(--c-lake);
}

.page-faq .faq-index__link[aria-current="true"] {
  border-left-color: var(--c-sunset);
  background-color: var(--faq-warm-glow);
  color: var(--c-indigo);
  font-weight: 600;
}

.page-faq .faq-index__num {
  flex: none;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--c-lake);
}

.page-faq .faq-index__note {
  margin: 1.1rem 0 0;
  padding-left: 0.9rem;
  border-left: 1px solid var(--faq-hair-paper);
  font-size: 0.8125rem;
  line-height: 1.75;
  color: var(--tx-muted-paper);
}

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

.page-faq .faq-group {
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
  scroll-margin-top: calc(var(--status-h) + 1.5rem);
}

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

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.35rem 0.9rem;
  align-items: baseline;
  padding-bottom: 1.1rem;
  border-bottom: 2px solid var(--c-indigo);
}

.page-faq .faq-group__idx {
  font-size: 0.8125rem;
  letter-spacing: 0.14em;
  color: var(--c-sunset);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.4rem, 2.5vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: 0.005em;
  color: var(--c-indigo);
}

.page-faq .faq-group__desc {
  grid-column: 2;
  margin: 0.5rem 0 0;
  max-width: 62ch;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--tx-muted-paper);
}

.page-faq .faq-item {
  border-bottom: 1px solid var(--faq-hair-paper);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 1.15rem 0.25rem 1.15rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.6;
  color: var(--c-indigo);
  transition: color var(--dur) var(--ease);
}

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

.page-faq .faq-item__q:hover {
  color: var(--c-lake);
}

.page-faq .faq-item__sign {
  position: relative;
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.28rem;
  color: var(--c-lake);
}

.page-faq .faq-item__sign::before,
.page-faq .faq-item__sign::after {
  content: "";
  position: absolute;
  background-color: currentColor;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}

.page-faq .faq-item__sign::before {
  left: 0;
  top: 50%;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.page-faq .faq-item__sign::after {
  left: 50%;
  top: 0;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-item[open] .faq-item__sign::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

.page-faq .faq-item[open] .faq-item__q {
  color: var(--c-lake);
}

.page-faq .faq-item__a {
  padding: 0 0 1.5rem 2.05rem;
  max-width: 70ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--tx-paper);
}

.page-faq .faq-item__a p {
  margin: 0 0 0.8rem;
}

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

.page-faq .faq-item__a a {
  color: var(--c-lake);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  color: var(--c-sunset);
}

.page-faq .faq-figure {
  margin: 0 0 clamp(2.5rem, 5vw, 4rem);
  border: 1px solid var(--faq-hair-paper);
  background-color: var(--c-indigo);
}

.page-faq .faq-figure .media__caption {
  color: var(--tx-muted-dark);
}

/* ---------- 收尾 ---------- */

.page-faq .faq-closing {
  background-color: var(--c-indigo);
  color: var(--tx-dark);
  padding-block: clamp(2.5rem, 5vw, 4rem);
  border-top: 1px solid var(--faq-hair);
}

.page-faq .faq-closing__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 3vw, 2.5rem);
  align-items: center;
  border: 1px solid var(--faq-hair);
  border-left: 4px solid var(--c-sunset);
  background-color: var(--c-panel);
  padding: clamp(1.5rem, 3.5vw, 2.75rem);
}

.page-faq .faq-closing__eyebrow {
  margin: 0 0 0.7rem;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--c-lake-light);
}

.page-faq .faq-closing__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.35rem, 2.6vw, 2rem);
  line-height: 1.25;
  color: var(--tx-dark-strong);
}

.page-faq .faq-closing__lede {
  margin: 0.9rem 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--tx-dark);
}

.page-faq .faq-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

/* ---------- 响应式 ---------- */

@media (max-width: 959px) {
  .page-faq .faq-index__list {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
    -webkit-overflow-scrolling: touch;
  }

  .page-faq .faq-index__list > li {
    flex: none;
  }

  .page-faq .faq-index__link {
    white-space: nowrap;
    border-left-width: 1px;
    border-bottom: 3px solid transparent;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    border-left-color: var(--faq-hair-paper);
    border-bottom-color: var(--c-lake);
  }

  .page-faq .faq-index__link[aria-current="true"] {
    border-left-color: var(--faq-hair-paper);
    border-bottom-color: var(--c-sunset);
  }

  .page-faq .faq-index__note {
    margin-top: 0.85rem;
  }
}

@media (min-width: 720px) {
  .page-faq .faq-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(1rem, 2.5vw, 2rem);
  }

  .page-faq .faq-steps__item + .faq-steps__item {
    padding-left: clamp(1rem, 2.5vw, 2rem);
    border-left: 1px solid var(--faq-hair);
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-closing__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

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

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 232px) minmax(0, 1fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--status-h) + 2rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-index__link,
  .page-faq .faq-item__q,
  .page-faq .faq-item__sign::before,
  .page-faq .faq-item__sign::after {
    transition: none;
  }
}