.page-faq {
  --faq-rail-w: 16rem;
  --faq-gap: clamp(1.25rem, 3vw, 2.75rem);
  background: var(--c-night);
  color: var(--c-chalk);
}

.page-faq .faq-crumb {
  padding-top: 1.25rem;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--c-line);
  background:
    radial-gradient(120% 90% at 85% 0%, rgba(43, 233, 200, 0.10), transparent 60%),
    var(--c-night);
  padding: clamp(2rem, 6vw, 4.5rem) 0 clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.28;
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: clamp(4rem, 14vw, 9rem);
  background: var(--c-gold);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--faq-gap);
  align-items: end;
}

.page-faq .faq-hero__kicker {
  color: var(--c-accent);
}

.page-faq .faq-hero__title {
  margin: 0.75rem 0 1rem;
  font-size: clamp(2rem, 6vw, 4rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--c-chalk);
}

.page-faq .faq-hero__lead {
  max-width: 38em;
  color: var(--c-chalk);
  opacity: 0.92;
}

.page-faq .faq-hero__meta {
  margin: 1.25rem 0 0;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  border-top: 1px solid var(--c-line);
  padding-top: 0.75rem;
}

.page-faq .faq-hero__media {
  margin: 0;
  border: 1px solid var(--c-line);
  position: relative;
}

.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, rgba(11, 43, 34, 0.55), rgba(6, 21, 18, 0.2));
  pointer-events: none;
}

.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.86);
}

.page-faq .faq-hero__media .cdx-figure__caption {
  display: block;
  padding: 0.6rem 0.75rem;
  border-top: 1px solid var(--c-line);
  background: var(--c-stand);
  color: var(--c-muted);
  font-size: 0.75rem;
  line-height: 1.6;
}

/* ---------- 规模速览 ---------- */
.page-faq .faq-stats {
  background: var(--c-stand);
  border-bottom: 1px solid var(--c-line);
}

.page-faq .faq-stats__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.5rem;
  padding-top: 1.25rem;
  padding-bottom: 1.25rem;
}

.page-faq .faq-stats__item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  border-left: 2px solid var(--c-turf);
  padding-left: 0.75rem;
}

.page-faq .faq-stats__num {
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  font-weight: 700;
  color: var(--c-warn);
  letter-spacing: 0.02em;
}

.page-faq .faq-stats__label {
  font-size: 0.8125rem;
  color: var(--c-muted);
}

/* ---------- 左右分栏 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(3rem, 7vw, 5.5rem);
}

.page-faq .faq-rail__kicker {
  color: var(--c-gold);
  margin: 0;
}

.page-faq .faq-rail__list,
.page-faq .faq-rail__group ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .faq-rail__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.page-faq .faq-rail__group ul {
  display: none;
}

.page-faq .faq-rail__topic {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  color: var(--c-chalk);
  text-decoration: none;
  border: 1px solid var(--c-line);
  padding: 0.4rem 0.6rem;
  transition: border-color var(--cdx-dur) var(--cdx-ease), color var(--cdx-dur) var(--cdx-ease);
}

.page-faq .faq-rail__topic:hover,
.page-faq .faq-rail__topic:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ---------- 问题区块 ---------- */
.page-faq .faq-block + .faq-block {
  margin-top: clamp(2.25rem, 5vw, 3.5rem);
}

.page-faq .faq-block__head {
  border-top: 2px solid var(--c-turf);
  padding-top: 1rem;
  margin-bottom: 1rem;
}

.page-faq .faq-block__kicker {
  color: var(--c-accent-2);
  margin: 0 0 0.5rem;
}

.page-faq .faq-block__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.25;
  color: var(--c-chalk);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-item {
  border: 1px solid var(--c-line);
  background: var(--c-stand);
  margin-top: 0.75rem;
  transition: border-color var(--cdx-dur) var(--cdx-ease), transform var(--cdx-dur) var(--cdx-ease);
}

.page-faq .faq-item:hover {
  border-color: var(--c-accent-2);
  transform: translateY(-2px);
}

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

.page-faq .faq-item:target {
  border-color: var(--c-gold);
  box-shadow: inset 3px 0 0 var(--c-gold);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-chalk);
}

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

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

.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: -2px;
}

.page-faq .faq-item__num {
  flex: none;
  font-size: 0.8125rem;
  color: var(--c-gold);
}

.page-faq .faq-item__text {
  min-width: 0;
  transition: color var(--cdx-dur) var(--cdx-ease);
}

.page-faq .faq-item__arrow {
  flex: none;
  margin-left: auto;
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--c-accent);
  border-bottom: 2px solid var(--c-accent);
  transform: rotate(45deg);
  transition: transform var(--cdx-dur) var(--cdx-ease);
}

.page-faq .faq-item[open] .faq-item__arrow {
  transform: rotate(225deg);
}

.page-faq .faq-item__a {
  border-top: 1px solid var(--c-line);
  padding: 0.9rem 1.1rem 1.15rem;
}

.page-faq .faq-item__p {
  margin: 0;
  max-width: 42ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--c-chalk);
  opacity: 0.9;
}

.page-faq .faq-item__p + .faq-item__p {
  margin-top: 0.6rem;
}

.page-faq .faq-fields {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.85rem 0 0;
  padding: 0;
}

.page-faq .faq-field {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.02em;
  color: var(--c-accent);
  border: 1px solid var(--c-line);
  background: var(--c-night);
  padding: 0.2rem 0.45rem;
}

.page-faq .faq-figure {
  margin: 1.5rem 0 0;
  border: 1px solid var(--c-line);
  background: var(--c-stand);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.88);
}

.page-faq .faq-figure .cdx-figure__caption {
  display: block;
  padding: 0.6rem 0.75rem;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: 0.75rem;
  line-height: 1.6;
}

/* ---------- 收尾 ---------- */
.page-faq .faq-cta {
  border-top: 1px solid var(--c-line);
  background:
    linear-gradient(120deg, rgba(227, 178, 60, 0.10), transparent 55%),
    var(--c-stand);
}

.page-faq .faq-cta__inner {
  display: grid;
  gap: 1.5rem;
  padding-top: clamp(2rem, 5vw, 3.25rem);
  padding-bottom: clamp(2.25rem, 5vw, 3.5rem);
}

.page-faq .faq-cta__kicker {
  color: var(--c-gold);
  margin: 0 0 0.5rem;
}

.page-faq .faq-cta__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.35rem, 3.4vw, 2rem);
  line-height: 1.25;
  color: var(--c-chalk);
}

.page-faq .faq-cta__text {
  margin: 0;
  color: var(--c-muted);
}

.page-faq .faq-cta__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
}

.page-faq .faq-cta__link {
  font-size: 0.875rem;
  color: var(--c-chalk);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 0.15rem;
}

.page-faq .faq-cta__link:hover,
.page-faq .faq-cta__link:focus-visible {
  color: var(--c-accent);
  border-bottom-color: var(--c-accent);
}

/* ---------- 桌面 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-stats__inner {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-cta__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-faq .faq-hero__media {
    margin-bottom: 0.25rem;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 7.5rem;
    align-self: start;
    max-height: calc(100vh - 9rem);
    overflow-y: auto;
    border-left: 1px solid var(--c-line);
    padding-left: 1.1rem;
    padding-right: 0.5rem;
  }

  .page-faq .faq-rail__list {
    display: block;
    margin-top: 1rem;
  }

  .page-faq .faq-rail__group + .faq-rail__group {
    margin-top: 1.5rem;
  }

  .page-faq .faq-rail__topic {
    display: block;
    border: 0;
    border-bottom: 1px solid var(--c-line);
    padding: 0 0 0.5rem;
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--c-accent);
  }

  .page-faq .faq-rail__group ul {
    display: block;
    margin-top: 0.65rem;
  }

  .page-faq .faq-rail__group li + li {
    margin-top: 0.4rem;
  }

  .page-faq .faq-rail__group li a {
    display: flex;
    gap: 0.5rem;
    font-size: 0.8125rem;
    line-height: 1.5;
    color: var(--c-muted);
    text-decoration: none;
  }

  .page-faq .faq-rail__group li a:hover,
  .page-faq .faq-rail__group li a:focus-visible {
    color: var(--c-accent);
  }

  .page-faq .faq-rail__no {
    flex: none;
    font-size: 0.75rem;
    color: var(--c-accent-2);
  }

  .page-faq .faq-item__q {
    padding: 1.1rem 1.4rem;
  }

  .page-faq .faq-item__a {
    padding: 1rem 1.4rem 1.35rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-item__arrow,
  .page-faq .faq-item__text {
    transition: none;
  }

  .page-faq .faq-item:hover {
    transform: none;
  }
}