.page-faq {
  --faq-hair: rgba(200, 214, 226, .18);
  --faq-hair-strong: rgba(200, 214, 226, .34);
  --faq-num-bg: rgba(216, 165, 65, .13);
  --faq-rail-w: 252px;
  padding-bottom: clamp(40px, 6vw, 88px);
  color: var(--c-ondark);
}

/* ---------- 面包屑 ---------- */
.page-faq .breadcrumbs {
  margin-bottom: clamp(18px, 2.6vw, 30px);
}
.page-faq .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--c-muted);
}
.page-faq .breadcrumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(200, 214, 226, .38);
}
.page-faq .breadcrumbs a {
  color: var(--c-ondark);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .breadcrumbs a:hover,
.page-faq .breadcrumbs a:focus-visible {
  color: var(--c-gold);
  border-bottom-color: var(--c-gold);
}
.page-faq .breadcrumbs [aria-current="page"] {
  color: var(--c-gold);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 4px;
}
.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -34px;
  right: -2%;
  width: min(380px, 44%);
  height: 168px;
  background: linear-gradient(118deg, rgba(20, 69, 110, .72), rgba(63, 208, 201, .08));
  clip-path: polygon(18% 0, 100% 0, 82% 100%, 0 100%);
  pointer-events: none;
  z-index: 0;
  display: none;
}
.page-faq .faq-hero > * {
  position: relative;
  z-index: 1;
}
.page-faq .faq-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(32px, 5.4vw, 60px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--c-head);
  max-width: 16em;
}
.page-faq .faq-hero__lead {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(15.5px, 1.6vw, 17.5px);
  line-height: 1.78;
  color: var(--c-ondark);
}
.page-faq .faq-hero__facts {
  display: flex;
  flex-wrap: wrap;
  row-gap: 12px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}
.page-faq .faq-hero__facts li {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding-right: clamp(16px, 2.4vw, 28px);
  margin-right: clamp(16px, 2.4vw, 28px);
  border-right: 1px solid var(--faq-hair);
}
.page-faq .faq-hero__facts li:last-child {
  border-right: 0;
  margin-right: 0;
  padding-right: 0;
}
.page-faq .faq-hero__k {
  font-family: var(--font-data);
  font-size: clamp(19px, 2.2vw, 24px);
  font-variant-numeric: tabular-nums;
  color: var(--c-gold);
  letter-spacing: -.01em;
}
.page-faq .faq-hero__u {
  font-size: 13px;
  color: var(--c-muted);
}

/* ---------- 首屏图 ---------- */
.page-faq .faq-hero__media {
  margin: clamp(24px, 4vw, 44px) 0 0;
  border: 1px solid var(--faq-hair);
  background: var(--c-night);
  overflow: hidden;
}
.page-faq .faq-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.72) contrast(1.06);
}
.page-faq .faq-hero__media .media__cap {
  display: block;
  padding: 12px 16px;
  border-top: 1px solid var(--faq-hair);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 分组索引 ---------- */
.page-faq .faq-index {
  display: flex;
  gap: 8px;
  margin-top: clamp(26px, 4vw, 44px);
  padding: 12px 0;
  overflow-x: auto;
  border-top: 1px solid var(--faq-hair);
  border-bottom: 1px solid var(--faq-hair);
  scrollbar-width: none;
}
.page-faq .faq-index::-webkit-scrollbar {
  display: none;
}
.page-faq .faq-index__item {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--faq-hair);
  color: var(--c-ondark);
  text-decoration: none;
  font-size: 14px;
  line-height: 1;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), color .18s var(--ease);
}
.page-faq .faq-index__item:hover,
.page-faq .faq-index__item:focus-visible {
  background: var(--c-blue);
  border-color: var(--c-gold);
  color: var(--c-paper);
}
.page-faq .faq-index__num {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--c-gold);
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  padding-top: clamp(28px, 4vw, 52px);
  align-items: start;
}
.page-faq .faq-main {
  min-width: 0;
}

/* ---------- 问句索引轨道 ---------- */
.page-faq .faq-side {
  display: none;
}
.page-faq .faq-rail__title {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-muted);
}
.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
}
.page-faq .faq-rail__link {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: 10px;
  align-items: center;
  padding: 7px 0;
  color: var(--c-muted);
  text-decoration: none;
  font-size: 13.5px;
  line-height: 1.45;
  transition: color .18s var(--ease);
}
.page-faq .faq-rail__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1px solid var(--faq-hair-strong);
  background: transparent;
  transition: background-color .18s var(--ease), border-color .18s var(--ease), transform .18s var(--ease);
}
.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible,
.page-faq .faq-rail__link.is-active {
  color: var(--c-paper);
}
.page-faq .faq-rail__link:hover .faq-rail__dot,
.page-faq .faq-rail__link:focus-visible .faq-rail__dot,
.page-faq .faq-rail__link.is-active .faq-rail__dot {
  background: var(--c-gold);
  border-color: var(--c-gold);
  transform: scale(1.3);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 20px);
  padding-bottom: clamp(26px, 3.6vw, 46px);
  border-bottom: 1px solid var(--faq-hair);
}
.page-faq .faq-group + .faq-group {
  padding-top: clamp(26px, 3.6vw, 46px);
}
.page-faq .faq-group__head {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: clamp(14px, 2vw, 22px);
}
.page-faq .faq-group__mark {
  flex: 0 0 auto;
  width: 4px;
  height: 38px;
  margin-top: 3px;
  background: var(--c-gold);
}
.page-faq .faq-group__kicker {
  display: block;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--c-gold);
  margin-bottom: 6px;
}
.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 30px);
  line-height: 1.2;
  letter-spacing: -.015em;
  color: var(--c-head);
}

/* ---------- 折叠问答 ---------- */
.page-faq .qa {
  border-left: 2px solid rgba(200, 214, 226, .26);
  padding-left: clamp(12px, 1.6vw, 18px);
  border-top: 1px solid var(--faq-hair);
  transition: border-left-color .22s var(--ease);
}
.page-faq .qa:first-of-type {
  border-top: 0;
}
.page-faq .qa[open] {
  border-left-color: var(--c-gold);
}
.page-faq .qa__q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: start;
  padding: 15px 0;
  cursor: pointer;
  list-style: none;
  font-size: clamp(15.5px, 1.5vw, 17.5px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-head);
  transition: color .18s var(--ease);
}
.page-faq .qa__q::-webkit-details-marker {
  display: none;
}
.page-faq .qa__q:hover,
.page-faq .qa__q:focus-visible {
  color: var(--c-gold);
}
.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 3px;
}
.page-faq .qa__icon {
  position: relative;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--faq-hair-strong);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}
.page-faq .qa__icon::before,
.page-faq .qa__icon::after {
  content: "";
  position: absolute;
  background: var(--c-ondark);
  transition: background-color .18s var(--ease), transform .2s var(--ease), opacity .2s var(--ease);
}
.page-faq .qa__icon::before {
  left: 3px;
  right: 3px;
  top: calc(50% - .5px);
  height: 1px;
}
.page-faq .qa__icon::after {
  top: 3px;
  bottom: 3px;
  left: calc(50% - .5px);
  width: 1px;
}
.page-faq .qa[open] .qa__icon {
  border-color: var(--c-gold);
  background: var(--faq-num-bg);
}
.page-faq .qa[open] .qa__icon::before {
  background: var(--c-gold);
}
.page-faq .qa[open] .qa__icon::after {
  transform: scaleY(0);
  opacity: 0;
}
.page-faq .qa__a {
  padding: 0 0 clamp(16px, 2vw, 22px);
}
.page-faq .qa__a p {
  margin: 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ondark);
}
.page-faq .qa__a p + p {
  margin-top: 10px;
}
.page-faq .fx {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  font-size: .93em;
  color: var(--c-gold);
  background: var(--faq-num-bg);
  border-bottom: 1px solid rgba(216, 165, 65, .42);
  padding: 1px 5px;
  white-space: nowrap;
}
.page-faq .faq-link {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 208, 201, .4);
  transition: color .18s var(--ease), border-color .18s var(--ease);
}
.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--c-paper);
  border-bottom-color: var(--c-gold);
}

/* ---------- 组内插图 ---------- */
.page-faq .faq-figure {
  margin: 0 0 clamp(16px, 2.4vw, 26px);
  border: 1px solid var(--faq-hair);
  background: var(--c-night);
  overflow: hidden;
}
.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  filter: saturate(.68) contrast(1.05);
}
.page-faq .faq-figure .media__cap {
  display: block;
  padding: 11px 15px;
  border-top: 1px solid var(--faq-hair);
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-muted);
}

/* ---------- 人工通道 ---------- */
.page-faq .faq-help {
  position: relative;
  scroll-margin-top: calc(var(--bar-h) + 20px);
  margin-top: clamp(36px, 5.4vw, 72px);
  border: 1px solid var(--faq-hair-strong);
  border-top: 3px solid var(--c-gold);
  background:
    radial-gradient(120% 140% at 100% 0%, rgba(242, 106, 75, .16), transparent 58%),
    linear-gradient(135deg, rgba(20, 69, 110, .84), rgba(11, 27, 43, .94));
  padding: clamp(26px, 4vw, 52px);
  overflow: hidden;
}
.page-faq .faq-help__mark {
  position: absolute;
  top: 0;
  right: clamp(20px, 4vw, 56px);
  width: 1px;
  height: clamp(48px, 8vw, 92px);
  background: linear-gradient(180deg, var(--c-coral), transparent);
  pointer-events: none;
}
.page-faq .faq-help__body {
  position: relative;
  z-index: 1;
}
.page-faq .faq-help__kicker {
  display: block;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--c-gold);
  margin-bottom: 10px;
}
.page-faq .faq-help__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.18;
  letter-spacing: -.015em;
  color: var(--c-head);
}
.page-faq .faq-help__lead {
  margin: 16px 0 0;
  max-width: 40em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--c-ondark);
}
.page-faq .faq-help__contact {
  display: grid;
  gap: 12px;
  margin: clamp(20px, 3vw, 30px) 0 0;
}
.page-faq .faq-help__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
}
.page-faq .faq-help__row dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-muted);
}
.page-faq .faq-help__row dd {
  margin: 0;
}
.page-faq .faq-help__mono {
  font-family: var(--font-data);
  font-size: clamp(14.5px, 1.7vw, 17px);
  font-variant-numeric: tabular-nums;
  color: var(--c-paper);
  border-bottom: 1px solid rgba(216, 165, 65, .5);
  padding-bottom: 2px;
}
.page-faq .faq-help__meter {
  display: grid;
  grid-template-columns: 9px minmax(0, 1fr) 9px;
  align-items: center;
  gap: 0;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
}
.page-faq .faq-help__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--c-gold);
  background: var(--c-ink);
}
.page-faq .faq-help__dot--end {
  border-color: var(--c-coral);
  background: var(--c-coral);
}
.page-faq .faq-help__bar {
  display: block;
  height: 1px;
  background: linear-gradient(90deg, var(--c-gold), var(--c-coral));
}
.page-faq .faq-help__scale {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 8px;
  font-family: var(--font-data);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--c-muted);
}
.page-faq .faq-help__cta {
  margin: clamp(22px, 3vw, 32px) 0 0;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 768px) {
  .page-faq .faq-hero::before {
    display: block;
  }
  .page-faq .faq-help__contact {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 32px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(0, 1fr) var(--faq-rail-w);
  }
  .page-faq .faq-side {
    display: block;
  }
  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 24px);
    padding-left: 18px;
    border-left: 1px solid var(--faq-hair-strong);
  }
}

@media (min-width: 1280px) {
  .page-faq .faq-group__head {
    gap: 18px;
  }
  .page-faq .qa {
    padding-left: 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq *,
  .page-faq *::before,
  .page-faq *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}
</main>