.page-faq {
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-faq .page-faq__crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: 32px 0 40px;
  border-bottom: 1px solid var(--steel);
  background:
    radial-gradient(120% 150% at 8% 0%, rgba(18, 217, 196, 0.09) 0%, rgba(6, 18, 31, 0) 58%),
    radial-gradient(90% 120% at 92% 100%, rgba(59, 245, 166, 0.07) 0%, rgba(6, 18, 31, 0) 60%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 48, 72, 0.85) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 48, 72, 0.85) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.45;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 82%);
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(52px, 15vw, 132px);
  line-height: 0.9;
  letter-spacing: -0.01em;
  color: var(--text);
  transform: skewX(-2deg);
  transform-origin: left bottom;
  text-shadow: 0 0 42px rgba(59, 245, 166, 0.16);
}

.page-faq .faq-hero__lede {
  max-width: 68ch;
  margin: 20px 0 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-hero__ghost {
  position: absolute;
  right: -8px;
  bottom: -28px;
  font-size: clamp(72px, 18vw, 190px);
  line-height: 1;
  color: rgba(42, 79, 107, 0.28);
  letter-spacing: -0.04em;
  pointer-events: none;
  user-select: none;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  padding: 32px 0 64px;
}

.page-faq .faq-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

/* ---------- 左侧分类索引 ---------- */
.page-faq .faq-rail__fig {
  margin: 0 0 18px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-rail__media {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 3 / 2;
  filter: saturate(0.92) contrast(1.04);
}

.page-faq .faq-rail__title {
  margin: 0 0 10px;
  font-family: var(--font-head);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  padding: 7px 12px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.4;
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-faq .faq-rail__link .num {
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--text);
  border-color: var(--turf);
}

.page-faq .faq-rail__link.is-active {
  color: var(--ink-900);
  border-color: var(--turf);
  background: var(--turf);
}

.page-faq .faq-rail__link.is-active .num {
  color: var(--ink-900);
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-stream {
  min-width: 0;
}

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

.page-faq .faq-group + .faq-group {
  margin-top: 44px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--steel);
}

.page-faq .faq-group__no {
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--turf);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, 28px);
  letter-spacing: 0.02em;
  color: var(--text);
}

.page-faq .faq-group__meta {
  margin: 0 0 0 auto;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-group__list {
  margin-top: 4px;
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-bottom: 1px solid rgba(42, 79, 107, 0.7);
}

.page-faq .qa__q {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 18px;
  align-items: start;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .qa__q:hover .qa__text,
.page-faq .qa__q:focus-visible .qa__text {
  color: var(--turf);
}

.page-faq .qa__idx {
  font-size: 13px;
  line-height: 1.9;
  color: var(--cyan);
  letter-spacing: 0.06em;
}

.page-faq .qa__text {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text);
  transition: color var(--dur) var(--ease);
}

.page-faq .qa__sign {
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 8px;
  justify-self: end;
}

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

.page-faq .qa__sign::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .qa__sign::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .qa[open] .qa__sign::after {
  transform: scaleY(0);
}

.page-faq .qa[open] .qa__sign::before {
  background: var(--turf);
}

.page-faq .qa__a {
  position: relative;
  padding: 0 0 22px 52px;
}

.page-faq .qa__a::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 4px;
  width: 3px;
  height: 40px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--signal), var(--turf));
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
}

.page-faq .qa[open] .qa__a::before {
  opacity: 1;
}

.page-faq .qa__a p {
  margin: 0;
  font-size: 15px;
  line-height: 2;
  color: var(--muted);
}

.page-faq .qa__a p strong {
  color: var(--text);
  font-weight: 600;
}

/* ---------- 时间线配图 ---------- */
.page-faq .faq-timeline {
  margin: 20px 0 4px;
  border: 1px solid var(--steel);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-800);
}

.page-faq .faq-timeline .frame__media {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
}

.page-faq .faq-timeline .frame__caption {
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
  border-top: 1px solid var(--steel);
}

/* ---------- 兜底面板 ---------- */
.page-faq .faq-group--cta .faq-group__head {
  margin-bottom: 18px;
}

.page-faq .faq-cta {
  background: var(--ink-800);
}

.page-faq .faq-cta__body {
  padding-top: 22px;
  padding-bottom: 22px;
}

.page-faq .faq-cta__text {
  max-width: 62ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.page-faq .faq-contact {
  margin-top: 24px;
}

.page-faq .faq-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 12px;
  padding: 12px 0;
  border-top: 1px solid var(--steel);
}

.page-faq .faq-contact__label {
  grid-column: 1 / -1;
  font-family: var(--font-head);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-faq .faq-contact__value {
  min-width: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-faq .faq-copy {
  padding: 5px 12px;
  font-size: 12px;
  line-height: 1.4;
}

.page-faq .faq-copy.is-done {
  border-color: var(--turf);
  color: var(--turf);
}

.page-faq .faq-cta__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--steel);
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 窄屏收敛 ---------- */
@media (max-width: 479px) {
  .page-faq .faq-hero__title {
    font-size: clamp(44px, 17vw, 68px);
  }

  .page-faq .qa__q {
    grid-template-columns: 30px minmax(0, 1fr) 16px;
    gap: 8px;
  }

  .page-faq .qa__a {
    padding-left: 38px;
  }

  .page-faq .qa__a::before {
    left: 6px;
  }

  .page-faq .faq-group__meta {
    display: none;
  }
}

/* ---------- 桌面：左侧固定索引 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 56px 0 64px;
  }

  .page-faq .faq-body {
    padding: 56px 0 96px;
  }

  .page-faq .faq-shell {
    grid-template-columns: 248px minmax(0, 1fr);
    gap: 56px;
    align-items: start;
  }

  .page-faq .faq-rail__inner {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    padding-right: 4px;
  }

  .page-faq .faq-rail__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 2px;
    border-left: 1px solid var(--steel);
  }

  .page-faq .faq-rail__link {
    border: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
    margin-left: -1px;
    padding: 9px 12px;
    font-size: 14px;
    background: transparent;
  }

  .page-faq .faq-rail__link:hover,
  .page-faq .faq-rail__link:focus-visible {
    border-left-color: var(--cyan);
    background: rgba(18, 217, 196, 0.06);
  }

  .page-faq .faq-rail__link.is-active {
    border-left-color: var(--turf);
    background: linear-gradient(90deg, rgba(59, 245, 166, 0.14), rgba(59, 245, 166, 0) 78%);
    color: var(--text);
  }

  .page-faq .faq-rail__link.is-active .num {
    color: var(--turf);
  }

  .page-faq .qa__a {
    padding-right: 40px;
  }

  .page-faq .faq-contact__row {
    grid-template-columns: 96px minmax(0, 1fr) auto;
  }

  .page-faq .faq-contact__label {
    grid-column: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa__q,
  .page-faq .qa__text,
  .page-faq .qa__sign::before,
  .page-faq .qa__sign::after,
  .page-faq .qa__a::before,
  .page-faq .faq-rail__link {
    transition: none;
  }
}