.page-faq {
  --faq-radius: 16px;
  --faq-shadow: 0 24px 60px -32px rgba(0, 0, 0, 0.65);
  --faq-glow: 0 0 0 1px rgba(53, 242, 208, 0.35), 0 0 28px -6px rgba(53, 242, 208, 0.35);
  padding-bottom: 32px;
}

/* ---------- 面包屑 ---------- */
.page-faq .faq-crumb-wrap {
  padding-top: 24px;
  padding-bottom: 8px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: 24px;
}

.page-faq .faq-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: end;
}

.page-faq .faq-hero__text h1 {
  font-size: clamp(38px, 6.4vw, 88px);
  line-height: 0.98;
  margin: 12px 0 20px;
  letter-spacing: -0.02em;
}

.page-faq .faq-hero__text .bt-lead {
  max-width: 62ch;
}

.page-faq .faq-hero__aside {
  display: flex;
  justify-content: flex-start;
  padding-bottom: 6px;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1fr) 120px;
    gap: 48px;
  }

  .page-faq .faq-hero__aside {
    justify-content: flex-end;
    align-items: flex-end;
  }
}

/* ---------- 快速入口 ---------- */
.page-faq .faq-quick-section {
  background: var(--pitch-800);
  border-top: 1px solid var(--line-600);
  border-bottom: 1px solid var(--line-600);
}

.page-faq .faq-quick__layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}

.page-faq .faq-quick__intro {
  color: var(--mist-400);
  font-size: 16px;
  line-height: 1.75;
  margin: 12px 0 28px;
  max-width: 56ch;
}

.page-faq .faq-quick {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-faq .faq-quick__card {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "num desc"
    "go go";
  column-gap: 18px;
  row-gap: 6px;
  padding: 22px 20px;
  background: var(--pitch-700);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-m);
  text-decoration: none;
  color: inherit;
  transition: border-color 160ms ease, transform 160ms ease, background-color 160ms ease;
}

.page-faq .faq-quick__card:hover,
.page-faq .faq-quick__card:focus-visible {
  border-color: var(--cyan-400);
  background: var(--pitch-900);
  transform: translateY(-2px);
}

.page-faq .faq-quick__num {
  grid-area: num;
  font-size: 26px;
  line-height: 1;
  color: var(--cyan-400);
  letter-spacing: 0.04em;
}

.page-faq .faq-quick__title {
  grid-area: title;
  font-size: 17px;
  font-weight: 700;
  color: var(--mist-100);
  align-self: center;
}

.page-faq .faq-quick__desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.6;
  color: var(--mist-400);
}

.page-faq .faq-quick__go {
  grid-area: go;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-600);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist-600);
  transition: color 160ms ease;
}

.page-faq .faq-quick__card:hover .faq-quick__go,
.page-faq .faq-quick__card:focus-visible .faq-quick__go {
  color: var(--cyan-400);
}

.page-faq .faq-quick__figure {
  margin: 0;
}

.page-faq .faq-quick__figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 220px;
  object-fit: cover;
  border-radius: var(--radius-l);
  border: 1px solid var(--line-600);
}

@media (min-width: 700px) {
  .page-faq .faq-quick {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .page-faq .faq-quick__layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 64px;
  }
}

/* ---------- 问题分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 96px;
}

.page-faq .faq-group__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-faq .faq-group__head {
  position: relative;
}

.page-faq .faq-group__index {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
  padding-bottom: 10px;
}

.page-faq .faq-group__head h2 {
  margin: 0 0 12px;
}

.page-faq .faq-group__note {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist-400);
  max-width: 38ch;
}

@media (min-width: 920px) {
  .page-faq .faq-group__grid {
    grid-template-columns: minmax(220px, 300px) minmax(0, 1fr);
    gap: 64px;
    align-items: start;
  }

  .page-faq .faq-group__head {
    position: sticky;
    top: 104px;
  }
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  border-top: 1px solid var(--line-600);
}

.page-faq .faq-item {
  position: relative;
  border-bottom: 1px solid var(--line-600);
  transition: background-color 200ms ease;
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background-color 200ms ease;
}

.page-faq .faq-item[open] {
  background: var(--pitch-800);
}

.page-faq .faq-item[open]::before {
  background: var(--cyan-400);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 20px 20px 22px;
  cursor: pointer;
  list-style: none;
  transition: padding-left 200ms ease, color 160ms ease;
}

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

.page-faq .faq-item[open] .faq-q {
  padding-left: 30px;
}

.page-faq .faq-q__text {
  margin: 0;
  font-size: 17px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--mist-100);
  letter-spacing: 0.01em;
}

.page-faq .faq-q__icon {
  flex: none;
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}

.page-faq .faq-q__icon::before,
.page-faq .faq-q__icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--mist-400);
  transition: transform 200ms ease, background-color 160ms ease;
}

.page-faq .faq-q__icon::before {
  width: 14px;
  height: 1.5px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-q__icon::after {
  width: 1.5px;
  height: 14px;
  transform: translate(-50%, -50%);
}

.page-faq .faq-item[open] .faq-q__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
}

.page-faq .faq-q:hover .faq-q__icon::before,
.page-faq .faq-q:hover .faq-q__icon::after {
  background: var(--cyan-400);
}

.page-faq .faq-a {
  padding: 0 20px 24px 30px;
}

.page-faq .faq-a p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist-400);
  max-width: 68ch;
}

.page-faq .faq-a a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 208, 0.4);
  transition: border-color 160ms ease, color 160ms ease;
}

.page-faq .faq-a a:hover,
.page-faq .faq-a a:focus-visible {
  color: var(--mist-100);
  border-bottom-color: var(--mist-100);
}

@media (min-width: 700px) {
  .page-faq .faq-q {
    padding: 24px 24px 24px 26px;
  }

  .page-faq .faq-q__text {
    font-size: 18px;
  }

  .page-faq .faq-item[open] .faq-q {
    padding-left: 34px;
  }

  .page-faq .faq-a {
    padding: 0 24px 28px 34px;
  }

  .page-faq .faq-a p {
    font-size: 16px;
  }
}

/* ---------- 横向图片带 ---------- */
.page-faq .faq-band {
  position: relative;
  margin: 0;
  border-top: 1px solid var(--line-600);
  border-bottom: 1px solid var(--line-600);
  background: var(--pitch-800);
  overflow: hidden;
}

.page-faq .faq-band img {
  display: block;
  width: 100%;
  height: clamp(180px, 34vw, 380px);
  object-fit: cover;
  opacity: 0.72;
}

.page-faq .faq-band__cap {
  position: absolute;
  right: 18px;
  bottom: 18px;
  writing-mode: horizontal-tb;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--mist-400);
  background: rgba(7, 12, 10, 0.7);
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--line-600);
}

@media (min-width: 900px) {
  .page-faq .faq-band__cap {
    right: auto;
    left: 32px;
    bottom: 28px;
    writing-mode: vertical-rl;
    padding: 14px 6px;
    border-radius: 999px;
  }
}

/* ---------- 联系区块 ---------- */
.page-faq .faq-contact {
  padding-top: 72px;
}

.page-faq .faq-contact__box {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding: 32px 24px;
  background: var(--pitch-700);
  border: 1px solid var(--line-600);
  border-radius: var(--radius-l);
  box-shadow: var(--faq-shadow);
}

.page-faq .faq-contact__text h2 {
  margin: 10px 0 14px;
}

.page-faq .faq-contact__text p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist-400);
  max-width: 62ch;
}

.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-faq .faq-copy {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  padding: 8px 8px 8px 16px;
  background: var(--pitch-900);
  border: 1px solid var(--line-600);
  border-radius: 999px;
  transition: box-shadow 160ms ease, border-color 160ms ease;
}

.page-faq .faq-copy[data-copied] {
  border-color: var(--cyan-400);
  box-shadow: var(--faq-glow);
}

.page-faq .faq-copy__value {
  font-size: 13.5px;
  color: var(--mist-100);
  word-break: break-all;
}

.page-faq .faq-copy__btn {
  padding: 8px 16px;
  font-size: 13px;
}

.page-faq .faq-contact__actions .bt-btn[href] {
  text-decoration: none;
}

@media (min-width: 860px) {
  .page-faq .faq-contact__box {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: center;
    gap: 56px;
    padding: 48px 44px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-quick__card,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-copy,
  .page-faq .faq-q__icon::before,
  .page-faq .faq-q__icon::after {
    transition-duration: 0ms;
  }
}
</main>