.page-faq {
  --faq-rail-w: 232px;
  --faq-ink-soft: rgba(255, 255, 255, .76);
  --faq-hair: rgba(143, 166, 184, .28);
}

/* ---------- 面包屑下的首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 34px 0 44px;
  color: var(--c-white);
  background:
    radial-gradient(125% 92% at 88% 6%, rgba(23, 224, 200, .17) 0%, transparent 58%),
    linear-gradient(155deg, var(--c-deep) 0%, #05203A 58%, var(--c-navy) 100%);
}

.page-faq .faq-hero__grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 56px 56px;
}

.page-faq .faq-hero__trail {
  position: absolute;
  right: -10%;
  top: 34%;
  width: 54%;
  height: 3px;
  z-index: 0;
  pointer-events: none;
  transform: rotate(-13deg);
  transform-origin: right center;
  background: linear-gradient(90deg, transparent, rgba(23, 224, 200, .85));
}

.page-faq .faq-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 30px;
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-size: clamp(29px, 7.6vw, 62px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -.025em;
}

.page-faq .faq-hero__lead {
  margin: 18px 0 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
  clip-path: var(--cut-md);
}

.page-faq .faq-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 15px 13px;
  background: rgba(4, 28, 51, .74);
}

.page-faq .faq-stat__num {
  font-size: var(--fs-28);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
}

.page-faq .faq-stat__label {
  font-size: var(--fs-12);
  letter-spacing: .04em;
  color: var(--c-steel);
}

/* ---------- 问答主体 ---------- */
.page-faq .faq-body {
  padding: 30px 0 58px;
  background: var(--c-paper);
}

.page-faq .faq-body__grid {
  display: block;
}

.page-faq .faq-rail {
  margin-bottom: 26px;
}

.page-faq .faq-rail__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.page-faq .faq-rail .anchor-nav__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-rail .anchor-nav__list::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-rail .anchor-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-line);
  background: var(--c-white);
  color: var(--c-navy);
  font-size: var(--fs-14);
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
  transition:
    color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-rail .anchor-nav__link:hover {
  border-color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  color: var(--c-deep);
}

.page-faq .faq-rail .anchor-nav__link[aria-current="true"] {
  background: var(--c-deep);
  border-color: var(--c-deep);
  border-left-color: var(--c-cyan);
  color: var(--c-cyan);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group {
  margin: 0 0 40px;
  scroll-margin-top: 84px;
}

.page-faq .faq-group:last-child {
  margin-bottom: 0;
}

.page-faq .faq-group__head {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--c-deep);
}

.page-faq .faq-group__kicker {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--c-cyan-dark);
}

.page-faq .faq-group__title {
  margin: 0;
  font-size: clamp(21px, 4.6vw, 28px);
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--c-deep);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-item {
  margin-top: 10px;
  background: var(--c-white);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-line);
  clip-path: var(--cut-sm);
  transition:
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-item:hover {
  border-color: var(--c-cyan);
}

.page-faq .faq-item[open] {
  border-color: var(--c-cyan);
  border-left-color: var(--c-cyan);
  background: var(--c-white);
}

.page-faq .faq-item__q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-navy);
  transition: color var(--dur) var(--ease);
}

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

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

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

.page-faq .faq-item__num {
  flex: none;
  padding-top: 3px;
  font-size: var(--fs-14);
  letter-spacing: .05em;
  color: var(--c-steel);
  transition: color var(--dur) var(--ease);
}

.page-faq .faq-item[open] .faq-item__num {
  color: var(--c-cyan-dark);
}

.page-faq .faq-item__text {
  flex: 1 1 auto;
}

.page-faq .faq-item__icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
}

.page-faq .faq-item__icon::before,
.page-faq .faq-item__icon::after {
  content: "";
  position: absolute;
  background: var(--c-steel);
  transition:
    transform var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-faq .faq-item__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-item__icon::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-item__icon::before,
.page-faq .faq-item[open] .faq-item__icon::after {
  background: var(--c-cyan-dark);
}

.page-faq .faq-item[open] .faq-item__icon::after {
  transform: scaleY(0);
}

.page-faq .faq-item__a {
  padding: 0 18px 18px 50px;
  color: var(--c-navy);
  font-size: var(--fs-16);
  line-height: 1.75;
}

.page-faq .faq-item__a p {
  margin: 0;
  max-width: 38em;
}

/* ---------- 插图 ---------- */
.page-faq .faq-figure {
  margin: 18px 0 0;
}

.page-faq .faq-figure img,
.page-faq .faq-help__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-faq .faq-figure .media-frame__caption,
.page-faq .faq-help__figure .media-frame__caption {
  margin-top: 8px;
  font-size: var(--fs-12);
  line-height: 1.6;
  color: var(--c-steel);
}

/* ---------- 底部联系区 ---------- */
.page-faq .faq-help {
  position: relative;
  overflow: hidden;
  padding: 42px 0 52px;
  color: var(--c-white);
  background:
    radial-gradient(95% 125% at 10% 6%, rgba(255, 122, 41, .14) 0%, transparent 55%),
    linear-gradient(150deg, var(--c-navy) 0%, var(--c-deep) 100%);
}

.page-faq .faq-help__grid {
  display: grid;
  gap: 30px;
}

.page-faq .faq-help__title {
  margin: 12px 0 0;
  font-size: clamp(23px, 5.2vw, 36px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -.02em;
}

.page-faq .faq-help__text > p {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--faq-ink-soft);
}

.page-faq .faq-help__contact {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  background: var(--faq-hair);
  border: 1px solid var(--faq-hair);
  clip-path: var(--cut-md);
}

.page-faq .faq-help__contact li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  padding: 12px 16px;
  background: rgba(4, 28, 51, .55);
  font-size: var(--fs-14);
  line-height: 1.6;
}

.page-faq .faq-help__contact .u-mono {
  flex: none;
  min-width: 52px;
  font-size: var(--fs-12);
  letter-spacing: .12em;
  color: var(--c-cyan);
}

.page-faq .faq-help__contact li span:last-child {
  overflow-wrap: anywhere;
}

.page-faq .faq-help__actions {
  margin-top: 24px;
}

.page-faq .faq-help__figure {
  margin: 0;
  border: 1px solid var(--faq-hair);
  clip-path: var(--cut-md);
}

.page-faq .faq-help__figure .media-frame__caption {
  margin: 0;
  padding: 10px 14px;
  background: rgba(4, 28, 51, .6);
  color: var(--c-steel);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-hero {
    padding: 46px 0 56px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 1.6fr) minmax(250px, .8fr);
    align-items: end;
    gap: 44px;
  }

  .page-faq .faq-item__a {
    padding-left: 54px;
  }
}

@media (min-width: 1000px) {
  .page-faq .faq-body {
    padding: 44px 0 72px;
  }

  .page-faq .faq-body__grid {
    display: grid;
    grid-template-columns: var(--faq-rail-w) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: 88px;
    margin-bottom: 0;
  }

  .page-faq .faq-rail .anchor-nav__list {
    flex-direction: column;
    gap: 4px;
    padding-bottom: 0;
    overflow: visible;
  }

  .page-faq .faq-rail .anchor-nav__link {
    display: flex;
    white-space: normal;
  }

  .page-faq .faq-help {
    padding: 60px 0 68px;
  }

  .page-faq .faq-help__grid {
    grid-template-columns: minmax(0, 1fr) minmax(300px, .82fr);
    gap: 56px;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .page-faq .faq-stat__num {
    font-size: var(--fs-20);
  }

  .page-faq .faq-item__a {
    padding-left: 18px;
  }

  .page-faq .faq-item__q {
    gap: 10px;
    padding: 14px 14px;
    font-size: 15px;
  }
}
</main>