.page-faq {
  --faq-no-w: 34px;
  --faq-radius: 22px;
  background: var(--abyss);
  color: var(--mist);
  padding-bottom: clamp(56px, 7vw, 110px);
}

.page-faq .faq-crumbs {
  padding-top: clamp(16px, 2.6vw, 28px);
}

/* ---------- 首屏 ---------- */

.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero__inner {
  max-width: 62rem;
  padding-top: clamp(20px, 3.4vw, 42px);
}

.page-faq .faq-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(14px, 2vw, 22px);
  padding: 6px 16px;
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-pill);
  background: var(--cyan-soft);
  font-family: var(--font-num);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-faq .faq-hero__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -.015em;
  color: var(--mist);
  overflow-wrap: break-word;
}

.page-faq .faq-hero__lead {
  margin: clamp(16px, 2.4vw, 24px) 0 0;
  max-width: 44rem;
  font-size: clamp(15.5px, 1.35vw, 17px);
  line-height: 1.78;
  color: var(--mist-soft);
}

.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 30px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  list-style: none;
  font-size: 13.5px;
  color: var(--steel);
}

.page-faq .faq-hero__facts li {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}

.page-faq .faq-hero__facts .num {
  font-family: var(--font-num);
  font-weight: 700;
  font-size: 23px;
  color: var(--orange);
  letter-spacing: -.01em;
}

.page-faq .faq-hero__media {
  position: relative;
  margin: clamp(26px, 4vw, 46px) 0 0;
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-faq .faq-hero__media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    linear-gradient(112deg, rgba(6, 26, 46, .82) 0%, rgba(6, 26, 46, .16) 52%, rgba(61, 242, 210, .16) 100%);
}

/* ---------- 主体两栏 ---------- */

.page-faq .faq-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3.2vw, 38px);
  padding-top: clamp(38px, 5.6vw, 80px);
}

.page-faq .faq-index,
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-index__label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--steel);
  white-space: nowrap;
}

.page-faq .faq-index__bar {
  display: block;
  width: 36px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 47, .12));
}

.page-faq .faq-index__count {
  color: var(--orange);
  font-weight: 700;
  font-size: 15px;
}

.page-faq .faq-index__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-faq .faq-index__list > li {
  flex: 0 0 auto;
}

.page-faq .faq-index__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 15px;
  border: 1px solid var(--steel-line);
  border-radius: var(--radius-pill);
  background: rgba(13, 43, 74, .6);
  color: var(--steel);
  font-size: 13.5px;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color .2s var(--ease), color .2s var(--ease), background .2s var(--ease);
}

.page-faq .faq-index__link .num {
  font-family: var(--font-num);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible,
.page-faq .faq-index__link[aria-current="true"] {
  border-color: var(--cyan);
  background: var(--cyan-soft);
  color: var(--mist);
  outline: none;
}

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(34px, 4.4vw, 56px);
  scroll-margin-top: 88px;
}

.page-faq .faq-group:first-child {
  padding-top: 0;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--cyan-line);
}

.page-faq .faq-group__no {
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--cyan);
  padding: 4px 11px;
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-pill);
  background: var(--cyan-soft);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 3vw, 30px);
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-faq .faq-group__meta {
  margin-left: auto;
  font-family: var(--font-num);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--steel);
}

/* ---------- 问答条目 ---------- */

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

.page-faq .faq-item {
  border-bottom: 1px solid var(--steel-line);
}

.page-faq .faq-item > summary {
  display: grid;
  grid-template-columns: var(--faq-no-w) minmax(0, 1fr) 24px;
  align-items: start;
  gap: 12px;
  padding: clamp(15px, 1.9vw, 20px) 0;
  cursor: pointer;
  list-style: none;
}

.page-faq .faq-item > summary::-webkit-details-marker {
  display: none;
}

.page-faq .faq-item > summary::marker {
  content: "";
}

.page-faq .faq-item__no {
  padding-top: 4px;
  font-family: var(--font-num);
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--cyan);
}

.page-faq .faq-item__text {
  font-size: clamp(15.5px, 1.32vw, 16.5px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--mist);
  transition: color .2s var(--ease);
}

.page-faq .faq-item > summary:hover .faq-item__text {
  color: var(--cyan);
}

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

.page-faq .faq-item__mark::before,
.page-faq .faq-item__mark::after {
  content: "";
  position: absolute;
  inset: 0;
  margin: auto;
  border-radius: 2px;
  background: var(--cyan);
  transition: transform .24s var(--ease), opacity .24s var(--ease), background .22s var(--ease);
}

.page-faq .faq-item__mark::before {
  width: 10px;
  height: 1.5px;
}

.page-faq .faq-item__mark::after {
  width: 1.5px;
  height: 10px;
}

.page-faq .faq-item[open] > summary .faq-item__mark {
  border-color: rgba(255, 122, 47, .6);
  background: rgba(255, 122, 47, .14);
}

.page-faq .faq-item[open] > summary .faq-item__mark::before {
  background: var(--orange);
}

.page-faq .faq-item[open] > summary .faq-item__mark::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-item__a {
  padding: 0 0 clamp(16px, 2vw, 22px) calc(var(--faq-no-w) + 12px);
  animation: faq-reveal .28s var(--ease);
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.page-faq .faq-steps {
  counter-reset: step;
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-steps > li {
  counter-increment: step;
  position: relative;
  padding-left: 27px;
  font-size: clamp(14.5px, 1.22vw, 15.5px);
  line-height: 1.74;
  color: var(--mist-soft);
}

.page-faq .faq-steps > li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: .3em;
  width: 18px;
  height: 18px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 122, 47, .42);
  border-radius: 50%;
  font-family: var(--font-num);
  font-size: 10.5px;
  font-weight: 700;
  color: var(--orange);
}

.page-faq .faq-more {
  display: inline-block;
  margin-top: 13px;
  padding-bottom: 1px;
  border-bottom: 1px solid var(--cyan-line);
  color: var(--cyan);
  font-size: 13.5px;
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-faq .faq-more:hover,
.page-faq .faq-more:focus-visible {
  border-bottom-color: var(--cyan);
  color: var(--mist);
  outline: none;
}

.page-faq .faq-group__media {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  border: 1px solid var(--steel-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

/* ---------- 收束条 ---------- */

.page-faq .faq-outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: clamp(42px, 5.4vw, 76px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--cyan-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(118deg, rgba(13, 43, 74, .92) 0%, rgba(27, 76, 99, .34) 100%);
}

.page-faq .faq-outro__text {
  margin: 0;
  max-width: 46rem;
  font-size: 15px;
  line-height: 1.72;
  color: var(--mist-soft);
}

/* ---------- 窄屏收敛 ---------- */

@media (max-width: 639px) {
  .page-faq {
    --faq-no-w: 26px;
  }

  .page-faq .faq-item > summary {
    gap: 10px;
  }

  .page-faq .faq-group__meta {
    margin-left: 0;
  }

  .page-faq .faq-hero__facts {
    gap: 6px 20px;
  }

  .page-faq .faq-hero__facts .num {
    font-size: 20px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    grid-template-columns: 214px minmax(0, 1fr);
    gap: clamp(34px, 4.4vw, 72px);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 92px;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }

  .page-faq .faq-index__link {
    width: 100%;
    justify-content: flex-start;
    padding: 10px 14px;
    border-radius: var(--radius-md);
  }
}

@media (min-width: 1440px) {
  .page-faq .faq-hero__inner {
    max-width: 68rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item__a {
    animation: none;
  }

  .page-faq .faq-item__mark::before,
  .page-faq .faq-item__mark::after,
  .page-faq .faq-item__text,
  .page-faq .faq-index__link,
  .page-faq .faq-more {
    transition: none;
  }
}