.page-faq {
  --faq-gap: clamp(1.25rem, 3.4vw, 2.6rem);
  --faq-index-w: 14rem;
  --faq-answer-bg: var(--paper);
  --faq-paper-ink: var(--paper-ink);
  --faq-paper-link: #A8390A;
  --faq-panel: rgba(16, 31, 60, .78);
  --faq-panel-hover: rgba(27, 46, 82, .9);
  padding-bottom: clamp(3rem, 8vw, 6rem);
  min-width: 0;
}

/* ---------- 页首 ---------- */
.page-faq .faq-head {
  padding-top: clamp(1.5rem, 5vw, 3.5rem);
}

.page-faq .faq-eyebrow {
  display: inline-flex;
  align-items: baseline;
  gap: .5rem;
  margin: clamp(1rem, 3vw, 1.75rem) 0 0;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-title {
  margin: .8rem 0 0;
  max-width: 24ch;
  font-family: var(--font-head);
  font-size: clamp(1.65rem, 4.8vw, 2.9rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.012em;
  color: var(--bright);
}

.page-faq .faq-lede {
  margin: clamp(.9rem, 2.4vw, 1.4rem) 0 0;
  max-width: 62ch;
  font-size: clamp(.94rem, 1.3vw, 1.03rem);
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  margin-top: clamp(1.75rem, 5vw, 3.25rem);
}

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

/* ---------- 主题索引 ---------- */
.page-faq .faq-index {
  min-width: 0;
  -webkit-mask-image: linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 26px), transparent 100%);
  mask-image: linear-gradient(90deg, transparent 0, #000 14px, #000 calc(100% - 26px), transparent 100%);
}

.page-faq .faq-index__label {
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: .4rem;
  margin: 0;
  padding: 0 0 .7rem;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-faq .faq-index__list::-webkit-scrollbar {
  height: 3px;
}

.page-faq .faq-index__list::-webkit-scrollbar-thumb {
  background: var(--line);
}

.page-faq .faq-index__link {
  display: block;
  padding: .5rem .8rem;
  border-bottom: 3px solid var(--line);
  white-space: nowrap;
  font-size: .82rem;
  line-height: 1.45;
  color: var(--mist);
  text-decoration: none;
  scroll-snap-align: start;
  transition: color .2s ease, border-color .2s ease;
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--bright);
  border-bottom-color: var(--orange);
}

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

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 5.5rem;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.25rem, 6vw, 4.5rem);
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group__head {
  padding-left: clamp(.8rem, 2vw, 1.1rem);
  border-left: 4px solid var(--orange);
}

.page-faq .faq-group__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2.5vw, 1.55rem);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -.005em;
  color: var(--bright);
}

.page-faq .faq-group__note {
  margin: .55rem 0 0;
  max-width: 48ch;
  font-size: .91rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-items {
  margin-top: clamp(1rem, 3vw, 1.9rem);
}

.page-faq .faq-items--flat {
  margin-top: 0;
}

.page-faq .faq-item {
  border-top: 1px solid var(--line);
}

.page-faq .faq-item:last-child {
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
  line-height: inherit;
}

.page-faq .faq-q__btn {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) 1.3rem;
  align-items: center;
  gap: .55rem;
  width: 100%;
  padding: 1.05rem .2rem;
  background: none;
  border: 0;
  color: var(--bright);
  font-family: var(--font-head);
  font-size: clamp(.98rem, 1.6vw, 1.1rem);
  font-weight: 600;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color .2s ease;
}

.page-faq .faq-q__btn:hover {
  color: var(--orange-hi);
}

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

.page-faq .faq-q__num {
  font-family: var(--font-mono);
  font-size: .76rem;
  font-feature-settings: "tnum" 1;
  color: var(--orange);
}

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

.page-faq .faq-q__btn .panel-fold__icon {
  justify-self: end;
  color: var(--mist);
}

/* ---------- 答案面板 ---------- */
.page-faq .faq-a {
  margin: 0 0 1.15rem;
  padding: clamp(.85rem, 2.2vw, 1.15rem) clamp(.9rem, 2.4vw, 1.25rem);
  background: var(--faq-answer-bg);
  color: var(--faq-paper-ink);
  border-radius: var(--radius);
  font-size: .93rem;
  line-height: 1.85;
}

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

.page-faq .faq-a p + p {
  margin-top: .55rem;
}

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

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

/* ---------- 分组尾注 ---------- */
.page-faq .faq-tail {
  margin: 1.1rem 0 0;
  font-size: .87rem;
  line-height: 1.8;
  color: var(--mist);
}

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

.page-faq .faq-tail a:hover {
  color: var(--orange-hi);
}

/* ---------- 图文分栏 ---------- */
.page-faq .faq-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.25rem, 3vw, 2rem);
}

.page-faq .faq-figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--deck);
}

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

/* ---------- 后续动作卡 ---------- */
.page-faq .faq-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: clamp(1.2rem, 3vw, 2rem);
}

.page-faq .faq-next__card {
  display: grid;
  gap: .5rem;
  padding: clamp(1.1rem, 3vw, 1.7rem);
  background: var(--faq-panel);
  border: 1px solid var(--line);
  border-left: 4px solid var(--orange);
  border-radius: var(--radius);
  text-decoration: none;
  transition: background-color .22s ease, border-color .22s ease, transform .22s ease;
}

.page-faq .faq-next__card:hover,
.page-faq .faq-next__card:focus-visible {
  background: var(--faq-panel-hover);
  border-left-color: var(--lime);
  transform: translateY(-2px);
}

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

.page-faq .faq-next__kicker {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-faq .faq-next__title {
  font-family: var(--font-head);
  font-size: clamp(1rem, 1.8vw, 1.12rem);
  font-weight: 700;
  line-height: 1.4;
  color: var(--bright);
}

.page-faq .faq-next__desc {
  font-size: .88rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 窄屏约束 ---------- */
@media (max-width: 480px) {
  .page-faq .faq-q__btn {
    grid-template-columns: 2rem minmax(0, 1fr) 1.1rem;
    gap: .45rem;
  }

  .page-faq .faq-figure {
    max-width: 20rem;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-next {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-faq .faq-split--media-left {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-faq .faq-split--media-right {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-faq .faq-split--media-right .faq-items {
    order: 1;
  }

  .page-faq .faq-split--media-right .faq-figure {
    order: 2;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-index {
    position: sticky;
    top: 4.75rem;
    -webkit-mask-image: none;
    mask-image: none;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    gap: .05rem;
    overflow: visible;
    padding-bottom: 0;
    scroll-snap-type: none;
  }

  .page-faq .faq-index__link {
    border-bottom: 0;
    border-left: 3px solid var(--line);
    white-space: normal;
    padding: .55rem .85rem;
    font-size: .85rem;
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    color: var(--bright);
    border-left-color: var(--orange);
    border-bottom-color: transparent;
  }
}

@media (min-width: 1180px) {
  .page-faq .faq-index-w,
  .page-faq {
    --faq-index-w: 15.5rem;
  }

  .page-faq .faq-title {
    max-width: 26ch;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-next__card,
  .page-faq .faq-index__link,
  .page-faq .faq-q__btn {
    transition: none;
  }

  .page-faq .faq-next__card:hover,
  .page-faq .faq-next__card:focus-visible {
    transform: none;
  }
}