.page-faq {
  --faq-gap: clamp(20px, 4vw, 44px);
  position: relative;
  background:
    radial-gradient(900px 480px at 84% -8%, rgba(53, 224, 214, .10), transparent 62%),
    linear-gradient(180deg, var(--bd-deep) 0%, var(--bd-midnight) 100%);
  color: var(--bd-white);
  padding-bottom: clamp(56px, 8vw, 110px);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  padding-top: clamp(24px, 4vw, 52px);
}

.page-faq .bd-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(18px, 3vw, 30px);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bd-grey);
}
.page-faq .bd-crumbs a {
  color: var(--bd-grey);
  text-decoration: none;
  transition: color .16s var(--bd-ease);
}
.page-faq .bd-crumbs a:hover,
.page-faq .bd-crumbs a:focus-visible {
  color: var(--bd-cyan);
}

.page-faq .faq-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--faq-gap);
}

.page-faq .faq-hero__title {
  margin: 10px 0 0;
  font-size: clamp(32px, 8vw, 62px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.015em;
}

.page-faq .faq-hero__lede {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: rgba(244, 247, 251, .8);
}
.page-faq .faq-hero__hint {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--bd-line);
  font-family: var(--bd-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--bd-grey);
}

.page-faq .faq-hero__media {
  position: relative;
  margin: clamp(26px, 4vw, 46px) 0 0;
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  overflow: hidden;
  background: var(--bd-panel);
}
.page-faq .faq-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    repeating-linear-gradient(90deg, rgba(30, 53, 87, .5) 0 1px, transparent 1px 76px),
    linear-gradient(180deg, rgba(7, 11, 20, 0) 42%, rgba(7, 11, 20, .88) 100%);
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(28px, 5vw, 64px);
  }
  .page-faq .faq-hero__title {
    font-size: clamp(44px, 5.2vw, 74px);
  }
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  margin-top: clamp(30px, 4.4vw, 56px);
}
.page-faq .faq-index__wrap {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--bd-line);
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  overflow: hidden;
}
.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  gap: 9px;
  padding: 15px 16px;
  background: var(--bd-midnight);
  color: var(--bd-white);
  font-size: 14.5px;
  text-decoration: none;
  transition: background .16s var(--bd-ease), color .16s var(--bd-ease);
}
.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--bd-panel);
  color: var(--bd-cyan);
}
.page-faq .faq-index__no {
  font-family: var(--bd-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--bd-orange);
}

@media (min-width: 780px) {
  .page-faq .faq-index__wrap {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 分组 ---------- */
.page-faq .faq-group,
.page-faq .faq-more {
  scroll-margin-top: 92px;
}

.page-faq .faq-group {
  margin-top: clamp(34px, 5.5vw, 64px);
  padding-top: clamp(38px, 6vw, 72px);
  border-top: 1px solid var(--bd-line);
}

.page-faq .faq-group__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: clamp(22px, 3.2vw, 36px);
}
.page-faq .faq-group__no {
  margin: 0;
  font-family: var(--bd-mono);
  font-size: clamp(38px, 6.5vw, 60px);
  font-weight: 700;
  line-height: .9;
  letter-spacing: -.03em;
  color: rgba(53, 224, 214, .34);
}
.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 30px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.01em;
}
.page-faq .faq-group__desc {
  margin: 9px 0 0;
  max-width: 42em;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--bd-grey);
}

@media (min-width: 880px) {
  .page-faq .faq-group__head {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: clamp(22px, 3.5vw, 44px);
    align-items: start;
  }
}

/* ---------- 问答条目 ---------- */
.page-faq .faq-item {
  margin-bottom: 10px;
  background: var(--bd-panel);
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  transition: border-color .16s var(--bd-ease);
}
.page-faq .faq-item:last-child {
  margin-bottom: 0;
}
.page-faq .faq-item:hover {
  border-color: rgba(53, 224, 214, .38);
}
.page-faq .faq-item[open] {
  border-color: rgba(53, 224, 214, .42);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: clamp(14px, 2vw, 18px) clamp(16px, 2.4vw, 22px);
  cursor: pointer;
  list-style: none;
  font-size: clamp(15px, 1.7vw, 16.5px);
  font-weight: 500;
  line-height: 1.56;
  transition: color .16s var(--bd-ease);
}
.page-faq .faq-item__q::-webkit-details-marker {
  display: none;
}
.page-faq .faq-item__q:hover {
  color: var(--bd-cyan);
}
.page-faq .faq-item__q:focus-visible {
  outline: 2px solid var(--bd-cyan);
  outline-offset: -2px;
}

.page-faq .faq-item__no {
  flex: 0 0 auto;
  min-width: 26px;
  padding-top: 3px;
  font-family: var(--bd-mono);
  font-size: 11.5px;
  letter-spacing: .1em;
  color: var(--bd-grey);
}
.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 4px;
}
.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--bd-cyan);
  transition: transform .22s var(--bd-ease), opacity .22s var(--bd-ease);
}
.page-faq .faq-item__icon::before {
  left: 0;
  top: 7px;
  width: 16px;
  height: 1.5px;
}
.page-faq .faq-item__icon::after {
  left: 7px;
  top: 0;
  width: 1.5px;
  height: 16px;
}
.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  margin: 0 clamp(16px, 2.4vw, 22px) clamp(16px, 2.4vw, 20px);
  padding: 14px 16px;
  border-left: 2px solid var(--bd-cyan);
  border-radius: 0 var(--bd-radius) var(--bd-radius) 0;
  background: var(--bd-glass);
  color: rgba(244, 247, 251, .82);
  font-size: 15px;
  line-height: 1.8;
}
.page-faq .faq-item__a p {
  margin: 0;
}
.page-faq .faq-item__a p + p {
  margin-top: 10px;
}

.page-faq .faq-item__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--bd-line);
}
.page-faq .faq-item__links a {
  padding-bottom: 1px;
  border-bottom: 1px solid rgba(53, 224, 214, .35);
  color: var(--bd-cyan);
  font-size: 14px;
  text-decoration: none;
}
.page-faq .faq-item__links a:hover,
.page-faq .faq-item__links a:focus-visible {
  border-bottom-color: var(--bd-cyan);
  color: var(--bd-white);
}

.page-faq .faq-item--key {
  background:
    linear-gradient(180deg, rgba(53, 224, 214, .09), rgba(53, 224, 214, 0) 52%),
    var(--bd-panel);
  border-color: rgba(53, 224, 214, .45);
}
.page-faq .faq-item--key .faq-item__no {
  color: var(--bd-orange);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  margin: clamp(20px, 3vw, 30px) 0 0;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  background: var(--bd-midnight);
}
.page-faq .faq-figure figcaption {
  margin-top: 10px;
  font-family: var(--bd-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--bd-grey);
}

/* ---------- 联络分组 ---------- */
.page-faq .faq-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
.page-faq .faq-contact__card {
  padding: clamp(18px, 2.4vw, 24px);
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  background: var(--bd-glass);
  transition: transform .16s var(--bd-ease), border-color .16s var(--bd-ease);
}
.page-faq .faq-contact__card:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 224, 214, .42);
}
.page-faq .faq-contact__label {
  margin: 0 0 10px;
  font-family: var(--bd-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--bd-grey);
}
.page-faq .faq-contact__value {
  margin: 0;
  font-size: clamp(15px, 1.7vw, 16.5px);
  line-height: 1.6;
  color: var(--bd-white);
  word-break: break-word;
}
.page-faq .faq-contact__note {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--bd-grey);
}
.page-faq .faq-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

@media (min-width: 760px) {
  .page-faq .faq-contact__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 相关页面 ---------- */
.page-faq .faq-more {
  margin-top: clamp(48px, 7vw, 90px);
  padding-top: clamp(30px, 4vw, 50px);
  border-top: 1px solid var(--bd-line);
}
.page-faq .faq-more__links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 18px;
  background: var(--bd-line);
  border: 1px solid var(--bd-line);
  border-radius: var(--bd-radius);
  overflow: hidden;
}
.page-faq .faq-more__link {
  display: block;
  padding: 18px 20px;
  background: var(--bd-panel);
  color: var(--bd-white);
  text-decoration: none;
  transition: background .16s var(--bd-ease);
}
.page-faq .faq-more__link:hover,
.page-faq .faq-more__link:focus-visible {
  background:
    linear-gradient(180deg, rgba(53, 224, 214, .12), rgba(53, 224, 214, .02)),
    var(--bd-panel);
}
.page-faq .faq-more__title {
  display: block;
  font-size: 16px;
  font-weight: 600;
}
.page-faq .faq-more__desc {
  display: block;
  margin-top: 7px;
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--bd-grey);
}

@media (min-width: 760px) {
  .page-faq .faq-more__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__icon::before,
  .page-faq .faq-item__icon::after,
  .page-faq .faq-contact__card {
    transition: none;
  }
  .page-faq .faq-contact__card:hover {
    transform: none;
  }
}
</main>