.page-faq {
  --faq-pad: clamp(1.15rem, 3.6vw, 2.5rem);
  --faq-answers: 900px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: calc(var(--mca-header-h) + clamp(2.25rem, 6vw, 4.5rem));
  padding-bottom: clamp(2rem, 5vw, 4rem);
  overflow: hidden;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -14%;
  width: min(620px, 78vw);
  aspect-ratio: 1;
  background: radial-gradient(circle at 40% 40%, var(--mca-cyan-glass), transparent 68%);
  pointer-events: none;
  filter: blur(10px);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  bottom: -6%;
  left: -10%;
  width: min(420px, 60vw);
  aspect-ratio: 1.4;
  background: radial-gradient(ellipse at center, rgba(255, 200, 87, .13), transparent 70%);
  pointer-events: none;
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.page-faq .faq-hero__lead h1 {
  margin: 0.6rem 0 0;
  font-size: clamp(2rem, 7.5vw, 4.1rem);
  line-height: 1.06;
  letter-spacing: -0.01em;
  max-width: 18ch;
}

.page-faq .faq-hero__lead .mca-lead {
  margin-top: 1rem;
  max-width: 52ch;
}

.page-faq .faq-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.page-faq .faq-hero__media {
  margin: 0;
  border-radius: var(--mca-radius-xl);
  overflow: hidden;
  border: 1px solid var(--mca-line);
  box-shadow: 0 30px 70px -40px rgba(0, 229, 199, .45);
}

.page-faq .faq-hero__media .mca-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  position: sticky;
  top: var(--mca-header-h);
  z-index: 6;
  background: linear-gradient(180deg, rgba(7, 11, 16, .97), rgba(7, 11, 16, .84));
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-top: 1px solid var(--mca-line-soft);
  border-bottom: 1px solid var(--mca-line-soft);
}

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

.page-faq .faq-index__label {
  flex: 0 0 auto;
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mca-mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0.75rem 0;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

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

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--mca-line);
  border-radius: var(--mca-pill);
  font-size: 0.85rem;
  color: var(--mca-glass);
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .25s var(--mca-ease), background .25s var(--mca-ease), color .25s var(--mca-ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  border-color: var(--mca-cyan);
  color: var(--mca-cyan);
  background: rgba(0, 229, 199, .07);
}

.page-faq .faq-index__num {
  font-size: 0.7rem;
  color: var(--mca-cyan);
  opacity: .85;
}

/* ---------- 分类区块 ---------- */
.page-faq .faq-block {
  position: relative;
  scroll-margin-top: calc(var(--mca-header-h) + 72px);
}

.page-faq .faq-block--alt::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(21, 27, 34, .72), rgba(7, 11, 16, 0));
  pointer-events: none;
}

.page-faq .faq-block__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
}

.page-faq .faq-block__head h2 {
  margin: 0.55rem 0 0;
  font-size: clamp(1.5rem, 4.6vw, 2.3rem);
  line-height: 1.15;
  max-width: 20ch;
}

.page-faq .faq-block__intro {
  margin: 0.85rem 0 0;
  color: var(--mca-mist);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 34ch;
}

.page-faq .faq-block__note {
  position: relative;
  margin-top: clamp(1.25rem, 3vw, 2rem);
  max-width: 62ch;
}

.page-faq .faq-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.25rem, 3.4vw, 2.25rem);
}

.page-faq .faq-block__media {
  margin: 0;
  border-radius: var(--mca-radius-lg);
  overflow: hidden;
  border: 1px solid var(--mca-line);
  background: var(--mca-graphite);
}

.page-faq .faq-block__media .mca-media__img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
  max-width: var(--faq-answers);
}

.page-faq .faq-item {
  border: 1px solid var(--mca-line);
  border-radius: var(--mca-radius-md);
  background: linear-gradient(180deg, rgba(21, 27, 34, .92), rgba(7, 11, 16, .92));
  transition: border-color .28s var(--mca-ease), box-shadow .28s var(--mca-ease), transform .28s var(--mca-ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(0, 229, 199, .45);
  transform: translateY(-1px);
}

.page-faq .faq-item[open] {
  border-color: rgba(0, 229, 199, .6);
  box-shadow: 0 22px 48px -34px rgba(0, 229, 199, .6);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.05rem var(--faq-pad);
  cursor: pointer;
  list-style: none;
  font-family: var(--mca-font-head);
  font-size: 1.06rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.45;
  color: var(--mca-glass);
  transition: color .25s var(--mca-ease);
}

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

.page-faq .faq-item__q::marker {
  content: "";
}

.page-faq .faq-item__q:hover,
.page-faq .faq-item__q:focus-visible {
  color: var(--mca-cyan);
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 22px;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  border: 1px solid var(--mca-line);
  border-radius: 50%;
  transition: border-color .28s var(--mca-ease), background .28s var(--mca-ease);
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  top: 50%;
  height: 1.5px;
  background: var(--mca-cyan);
  transform: translateY(-50%);
  transition: transform .3s var(--mca-ease), opacity .3s var(--mca-ease);
}

.page-faq .faq-item__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.page-faq .faq-item[open] .faq-item__icon {
  border-color: var(--mca-cyan);
  background: rgba(0, 229, 199, .12);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: translateY(-50%) rotate(0deg);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 var(--faq-pad) 1.15rem;
  border-top: 1px solid var(--mca-line-soft);
  margin-top: -1px;
}

.page-faq .faq-item__a p {
  margin: 0.9rem 0 0;
  color: var(--mca-mist);
  font-size: 0.95rem;
  line-height: 1.75;
  max-width: 68ch;
}

.page-faq .faq-item__a a {
  color: var(--mca-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 199, .4);
  transition: border-color .25s var(--mca-ease);
}

.page-faq .faq-item__a a:hover,
.page-faq .faq-item__a a:focus-visible {
  border-color: var(--mca-cyan);
}

/* ---------- 收尾 ---------- */
.page-faq .faq-block--closing {
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
}

.page-faq .faq-closing {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.35rem;
  padding: clamp(1.5rem, 4.5vw, 2.75rem);
  border: 1px solid var(--mca-line);
  border-radius: var(--mca-radius-xl);
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 200, 87, .14), transparent 58%),
    radial-gradient(circle at 0% 100%, var(--mca-cyan-glass), transparent 62%),
    var(--mca-graphite);
  overflow: hidden;
}

.page-faq .faq-closing__text h2 {
  margin: 0.5rem 0 0;
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  line-height: 1.15;
  max-width: 22ch;
}

.page-faq .faq-closing__text p {
  margin: 0.75rem 0 0;
  color: var(--mca-mist);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 46ch;
}

.page-faq .faq-closing__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.page-faq .faq-closing__actions .mca-cta,
.page-faq .faq-closing__actions .mca-btn {
  text-decoration: none;
}

.page-faq .faq-closing__meta {
  font-size: 0.78rem;
  color: var(--mca-mist);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.5rem);
  }

  .page-faq .faq-hero__media {
    transform: translateY(1.25rem) rotate(-0.6deg);
  }

  .page-faq .faq-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-faq .faq-block__media {
    position: sticky;
    top: calc(var(--mca-header-h) + 96px);
  }

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

  .page-faq .faq-closing__meta {
    grid-column: 1 / -1;
    padding-top: 0.9rem;
    border-top: 1px solid var(--mca-line-soft);
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-block__inner {
    grid-template-columns: minmax(230px, 0.66fr) minmax(0, 1.7fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .page-faq .faq-block__head {
    position: sticky;
    top: calc(var(--mca-header-h) + 96px);
    align-self: start;
  }

  .page-faq .faq-block__note {
    margin-left: calc(230px + clamp(2.5rem, 5vw, 4.5rem));
  }
}

@media (max-width: 520px) {
  .page-faq .faq-index__label {
    display: none;
  }

  .page-faq .faq-index__list {
    padding: 0.65rem 0;
  }

  .page-faq .faq-item__q {
    font-size: 0.98rem;
  }

  .page-faq .faq-closing__actions .mca-cta,
  .page-faq .faq-closing__actions .mca-btn {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

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

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

  .page-faq .faq-hero__media {
    transform: none;
  }
}