.page-faq {
  --faq-index-w: 232px;
  --faq-gap: clamp(1.75rem, 4vw, 3.5rem);
  --faq-radius: 0;
  background: var(--ink);
  color: var(--white);
  font-family: var(--font);
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--border);
  padding: clamp(1.5rem, 4vw, 2.25rem) 0 clamp(2rem, 5vw, 3.5rem);
  background:
    radial-gradient(120% 140% at 88% -25%, rgba(53, 242, 226, 0.15), transparent 58%),
    radial-gradient(90% 120% at -8% 6%, rgba(255, 90, 54, 0.11), transparent 55%),
    var(--ink);
}

.page-faq .faq-hero__glyph {
  position: absolute;
  right: -0.06em;
  top: -0.32em;
  font: 900 clamp(13rem, 42vw, 28rem) / 1 var(--font);
  letter-spacing: -0.05em;
  color: var(--panel);
  opacity: 0.6;
  pointer-events: none;
  user-select: none;
}

.page-faq .breadcrumb {
  position: relative;
  z-index: 1;
  font-size: 0.78rem;
  color: var(--mist);
  margin-bottom: clamp(1.5rem, 4vw, 2.5rem);
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-faq .breadcrumb__list li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--line);
}

.page-faq .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
}

.page-faq .breadcrumb a:hover,
.page-faq .breadcrumb a:focus-visible {
  color: var(--cyan);
}

.page-faq .breadcrumb__current {
  color: var(--white);
}

.page-faq .faq-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.5rem);
}

.page-faq .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan);
  margin: 0 0 0.9rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
}

.page-faq h1 {
  margin: 0 0 1.1rem;
  font-size: clamp(2rem, 6.4vw, 4rem);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--white);
}

.page-faq .lede {
  margin: 0;
  max-width: 60ch;
  font-size: clamp(0.95rem, 1.6vw, 1.0625rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .tag {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  font-size: 0.8125rem;
  line-height: 1.4;
  text-decoration: none;
  color: var(--mist);
  border: 1px solid var(--line);
  background: rgba(10, 23, 48, 0.7);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background var(--speed) var(--ease);
}

.page-faq .tag:hover,
.page-faq .tag:focus-visible {
  color: var(--white);
  border-color: var(--cyan);
}

.page-faq .tag--cyan {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
  font-weight: 700;
}

.page-faq .tag--cyan:hover,
.page-faq .tag--cyan:focus-visible {
  color: var(--ink);
  background: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

.page-faq .tag--flame {
  color: var(--white);
  background: var(--flame);
  border-color: var(--flame);
  font-weight: 700;
}

.page-faq .tag--flame:hover,
.page-faq .tag--flame:focus-visible {
  color: var(--white);
  background: #ff7355;
  border-color: #ff7355;
}

.page-faq .faq-facts {
  display: grid;
  gap: 0;
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-faq .faq-facts__item {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-facts dt {
  font-size: 0.8125rem;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-faq .faq-facts dd {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--white);
  font-weight: 700;
}

.page-faq .faq-facts .mono {
  color: var(--cyan);
  font-size: 1.0625rem;
}

/* ---------- 主体布局 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--faq-gap);
  padding-top: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-index__title {
  margin: 0 0 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-index__list {
  display: flex;
  gap: 0.4rem;
  margin: 0;
  padding: 0 0 0.5rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

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

.page-faq .faq-index__link {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.6rem 0.85rem;
  white-space: nowrap;
  font-size: 0.875rem;
  text-decoration: none;
  color: var(--mist);
  border: 1px solid var(--line);
  border-left: 2px solid var(--line);
  background: rgba(10, 23, 48, 0.6);
  transition: color var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background var(--speed) var(--ease);
}

.page-faq .faq-index__link .mono {
  font-size: 0.75rem;
  color: var(--line);
  transition: color var(--speed) var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  color: var(--white);
  border-color: var(--line);
  border-left-color: var(--cyan);
  background: rgba(53, 242, 226, 0.08);
}

.page-faq .faq-index__link:hover .mono,
.page-faq .faq-index__link:focus-visible .mono {
  color: var(--cyan);
}

.page-faq .faq-index__note {
  margin: 0.85rem 0 0;
  font-size: 0.8125rem;
  color: var(--mist);
  line-height: 1.7;
}

.page-faq .faq-index__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 226, 0.4);
}

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

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: 6rem;
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--cyan);
}

.page-faq .faq-group__num {
  font-size: 0.875rem;
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-faq h2.faq-group__title {
  margin: 0;
  font-size: clamp(1.25rem, 3.2vw, 1.9rem);
  font-weight: 900;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--white);
}

.page-faq .faq-group__desc {
  margin: 0.9rem 0 1.25rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 68ch;
}

.page-faq .faq-group__desc a,
.page-faq .faq-related a,
.page-faq .qa__a a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 226, 0.35);
}

.page-faq .faq-group__desc a:hover,
.page-faq .faq-related a:hover,
.page-faq .qa__a a:hover,
.page-faq .faq-group__desc a:focus-visible,
.page-faq .faq-related a:focus-visible,
.page-faq .qa__a a:focus-visible {
  border-bottom-color: var(--cyan);
  color: var(--cyan-soft);
}

/* ---------- 折叠条目 ---------- */
.page-faq .qa {
  border-top: 1px solid var(--line);
  background: transparent;
  transition: background var(--speed) var(--ease);
}

.page-faq .qa:last-of-type {
  border-bottom: 1px solid var(--line);
}

.page-faq .qa[open] {
  background: rgba(18, 41, 77, 0.32);
}

.page-faq .qa__q {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.1rem 0.25rem;
  cursor: pointer;
  list-style: none;
  transition: color var(--speed) var(--ease);
}

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

.page-faq .qa__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

.page-faq .qa__num {
  flex: 0 0 auto;
  padding-top: 0.28rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--mist);
  transition: color var(--speed) var(--ease);
}

.page-faq .qa__title {
  flex: 1 1 auto;
  min-width: 0;
  font-size: clamp(0.9688rem, 2.2vw, 1.0625rem);
  font-weight: 700;
  line-height: 1.55;
  color: var(--white);
}

.page-faq .qa__icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.85rem;
  height: 1.85rem;
  margin-top: 0.1rem;
  color: var(--cyan);
  border: 1px solid var(--line);
  transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease),
    background var(--speed) var(--ease);
}

.page-faq .qa[open] .qa__icon {
  transform: rotate(180deg);
  border-color: var(--cyan);
  background: rgba(53, 242, 226, 0.12);
}

.page-faq .qa[open] .qa__num {
  color: var(--cyan);
}

.page-faq .qa__q:hover .qa__title {
  color: var(--cyan-soft);
}

.page-faq .qa__a {
  padding: 0 0.25rem 1.35rem;
  color: var(--mist);
  font-size: 0.9375rem;
  line-height: 1.85;
}

.page-faq .qa__a p {
  margin: 0;
  max-width: 70ch;
}

/* ---------- 配图 ---------- */
.page-faq .faq-media {
  margin: 1.5rem 0 0;
}

.page-faq .media__frame {
  border: 1px solid var(--line);
  background: var(--cabin);
  overflow: hidden;
}

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

.page-faq .media__caption {
  display: block;
  margin-top: 0.65rem;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-faq .faq-related {
  margin: 1.5rem 0 0;
  font-size: 0.875rem;
  color: var(--mist);
}

/* ---------- 联系卡片 ---------- */
.page-faq .support-card {
  display: grid;
  gap: 1.25rem;
  margin-top: 1.75rem;
  padding: clamp(1.25rem, 3vw, 1.75rem);
  background: linear-gradient(155deg, var(--cabin), var(--panel));
  border: 1px solid var(--line);
  border-left: 3px solid var(--flame);
}

.page-faq .support-card__label {
  margin: 0 0 0.35rem;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--flame);
}

.page-faq .support-card__value {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  word-break: break-word;
}

.page-faq .support-card__value a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 226, 0.4);
}

.page-faq .support-card__value a:hover,
.page-faq .support-card__value a:focus-visible {
  color: var(--cyan-soft);
  border-bottom-color: var(--cyan-soft);
}

.page-faq .support-card__hint {
  margin: 0;
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-faq .qa__a {
    padding-left: 2.6rem;
  }

  .page-faq .qa__q {
    padding: 1.2rem 0.5rem;
  }

  .page-faq .support-card {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.5fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-index-w) minmax(0, 1fr);
    gap: clamp(2rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: 6rem;
    align-self: start;
  }

  .page-faq .faq-index__list {
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
    gap: 0.35rem;
  }

  .page-faq .faq-index__link {
    white-space: normal;
    width: 100%;
    padding: 0.65rem 0.85rem;
    background: transparent;
    border: 0;
    border-left: 2px solid var(--line);
  }

  .page-faq .faq-index__link:hover,
  .page-faq .faq-index__link:focus-visible {
    background: rgba(53, 242, 226, 0.07);
  }

  .page-faq .faq-media {
    margin-top: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .tag,
  .page-faq .qa,
  .page-faq .qa__icon,
  .page-faq .qa__num,
  .page-faq .faq-index__link {
    transition: none;
  }
}
<<<END>>>