.page-faq {
  --faq-rule: #E1E9F1;
  --faq-ink-soft: #263F5C;
  background: var(--white);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  background-color: var(--ink);
  background-image: radial-gradient(115% 85% at 88% 0%, rgba(36, 214, 232, 0.18), transparent 62%),
                    radial-gradient(90% 70% at 0% 100%, rgba(14, 42, 71, 0.9), transparent 70%);
  color: var(--white);
  overflow: hidden;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--signal));
  opacity: 0.85;
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 2.2rem;
  padding-top: clamp(1.6rem, 5vw, 2.8rem);
  padding-bottom: clamp(2.4rem, 7vw, 4.2rem);
}

.page-faq .faq-hero__lead .breadcrumb {
  margin-bottom: 1.4rem;
}

.page-faq .faq-hero__eyebrow {
  color: var(--cyan);
  letter-spacing: 0.2em;
}

.page-faq .faq-hero__title {
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(3.2rem, 15vw, 7.6rem);
  line-height: 0.9;
  letter-spacing: -0.02em;
  margin: 0.5rem 0 1.1rem;
  color: var(--white);
}

.page-faq .faq-hero__lede {
  max-width: 36rem;
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.86;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-faq .faq-hero__side {
  border-top: 1px solid var(--hair);
  padding-top: 1.1rem;
}

.page-faq .faq-hero__side-title {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-soft);
}

.page-faq .faq-hero__index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-faq .faq-hero__index a {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--hair);
  color: var(--white);
  font-size: 0.94rem;
  text-decoration: none;
  transition: color 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.page-faq .faq-hero__index a:hover,
.page-faq .faq-hero__index a:focus-visible {
  color: var(--cyan);
  padding-left: 0.35rem;
}

.page-faq .faq-hero__index .mono {
  color: var(--cyan-soft);
  font-size: 0.74rem;
}

.page-faq .faq-hero__hint {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--paper);
  opacity: 0.62;
}

/* ---------- 三步引导 ---------- */
.page-faq .faq-steps {
  background: var(--paper);
  padding-top: clamp(2.4rem, 7vw, 4.2rem);
  padding-bottom: clamp(2.4rem, 7vw, 4.2rem);
}

.page-faq .faq-steps__head {
  max-width: 46rem;
}

.page-faq .faq-steps__head h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.65rem, 5vw, 2.5rem);
  line-height: 1.16;
  letter-spacing: -0.01em;
  margin: 0.5rem 0 0.8rem;
  color: var(--ink);
}

.page-faq .faq-steps__head p {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.85;
  color: var(--stone);
}

.page-faq .faq-steps__list {
  list-style: none;
  margin: 1.9rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-faq .faq-step {
  position: relative;
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 1.5rem 1.2rem 1.3rem;
}

.page-faq .faq-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 1.2rem;
  width: 32px;
  height: 3px;
  background: var(--signal);
  border-radius: 0 0 3px 3px;
}

.page-faq .faq-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.55rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--deep);
}

.page-faq .faq-step h3 {
  margin: 0.35rem 0 0.55rem;
  font-size: 1.06rem;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .faq-step p {
  margin: 0 0 0.95rem;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--stone);
}

.page-faq .faq-step a {
  display: inline-block;
  font-size: 0.84rem;
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 2px;
}

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

.page-faq .faq-steps__figure {
  margin: 1.8rem 0 0;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--hair-cyan);
  background: linear-gradient(135deg, var(--abyss), var(--deep));
}

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

.page-faq .media-frame__caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--abyss);
  margin: 0;
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  background: var(--white);
  padding-top: clamp(2.2rem, 6vw, 3.6rem);
  padding-bottom: clamp(2.6rem, 7vw, 4.4rem);
}

.page-faq .faq-body__grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-toc {
  border-bottom: 1px solid var(--mist);
  padding-bottom: 1rem;
}

.page-faq .faq-toc__list {
  list-style: none;
  margin: 0.6rem 0 0;
  padding: 0 0 0.5rem;
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
}

.page-faq .faq-toc__list a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  white-space: nowrap;
  padding: 0.55rem 0.85rem;
  border: 1px solid var(--mist);
  border-radius: 999px;
  background: var(--paper);
  font-size: 0.84rem;
  color: var(--deep);
  text-decoration: none;
  transition: border-color 0.18s var(--ease), background 0.18s var(--ease);
}

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

.page-faq .faq-toc__list .mono {
  font-size: 0.72rem;
  color: var(--stone);
}

.page-faq .faq-toc__note {
  margin: 0.9rem 0 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--stone);
}

.page-faq .faq-toc__note a {
  color: var(--deep);
  border-bottom: 1px solid var(--cyan);
  text-decoration: none;
}

.page-faq .faq-group + .faq-group {
  margin-top: 2.8rem;
}

.page-faq .faq-group__head {
  border-top: 2px solid var(--ink);
  padding-top: 0.9rem;
  margin-bottom: 0.9rem;
}

.page-faq .faq-group__no {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--stone);
}

.page-faq .faq-group__head h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.4rem, 4.4vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: 0;
  margin: 0.3rem 0 0.35rem;
  color: var(--ink);
}

.page-faq .faq-group__head p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--stone);
}

.page-faq .faq-qa {
  border-bottom: 1px solid var(--faq-rule);
  border-left: 2px solid transparent;
  padding-left: 0.85rem;
  transition: border-left-color 0.2s var(--ease);
}

.page-faq .faq-qa[open] {
  border-left-color: var(--signal);
}

.page-faq .faq-qa summary {
  display: flex;
  align-items: flex-start;
  gap: 0.85rem;
  padding: 1.05rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
}

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

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

.page-faq .faq-qa__mark {
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-top: 0.42rem;
}

.page-faq .faq-qa__mark::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 2px;
  background: var(--deep);
  transform: translateY(-50%);
}

.page-faq .faq-qa__mark::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--deep);
  transform: translateX(-50%);
  transition: transform 0.18s var(--ease), opacity 0.18s var(--ease);
}

.page-faq .faq-qa[open] .faq-qa__mark::after {
  transform: translateX(-50%) scaleY(0);
  opacity: 0;
}

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

.page-faq .faq-qa__a {
  padding: 0 0 1.3rem 1.98rem;
  max-width: 62ch;
}

.page-faq .faq-qa__a p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.86;
  color: var(--faq-ink-soft);
}

.page-faq .faq-qa__a a {
  color: var(--deep);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
}

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

/* ---------- 延伸入口 ---------- */
.page-faq .faq-links {
  margin-top: 2.6rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--mist);
  display: grid;
  gap: 0.8rem;
}

.page-faq .faq-links a {
  display: block;
  padding: 1.05rem 1.15rem;
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--stone);
  font-size: 0.86rem;
  line-height: 1.72;
  text-decoration: none;
  transition: transform 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-links a:hover,
.page-faq .faq-links a:focus-visible {
  border-color: var(--cyan);
  transform: translateY(-2px);
}

.page-faq .faq-links .mono {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--stone);
  margin-bottom: 0.3rem;
}

.page-faq .faq-links strong {
  display: block;
  font-size: 1rem;
  color: var(--ink);
  margin-bottom: 0.2rem;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-support {
  background-color: var(--abyss);
  background-image: radial-gradient(90% 80% at 100% 0%, rgba(36, 214, 232, 0.14), transparent 62%);
  color: var(--white);
  padding-top: clamp(2.4rem, 7vw, 4.2rem);
  padding-bottom: clamp(2.4rem, 7vw, 4.2rem);
}

.page-faq .faq-support__grid {
  display: grid;
  gap: 2rem;
}

.page-faq .faq-support__copy .eyebrow {
  color: var(--cyan-soft);
}

.page-faq .faq-support__copy h2 {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.6rem, 5vw, 2.4rem);
  line-height: 1.18;
  margin: 0.5rem 0 0.8rem;
  color: var(--white);
}

.page-faq .faq-support__lede {
  margin: 0;
  max-width: 34rem;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.82;
}

.page-faq .faq-support__list {
  list-style: none;
  margin: 1.5rem 0 1.6rem;
  padding: 0;
  display: grid;
}

.page-faq .faq-support__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--hair);
  font-size: 0.92rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-support__list .mono {
  flex: 0 0 auto;
  font-size: 0.72rem;
  color: var(--cyan-soft);
  padding-top: 0.16rem;
}

.page-faq .faq-support__contact {
  margin: 0 0 1.4rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.9;
  word-break: break-word;
}

.page-faq .faq-support__contact a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(36, 214, 232, 0.45);
}

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

.page-faq .faq-support__figure {
  margin: 0;
  aspect-ratio: 2 / 1;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--hair-cyan);
  background: linear-gradient(135deg, var(--ink), var(--deep));
}

.page-faq .faq-support__figure .media-frame__caption {
  background: var(--ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-faq .faq-steps__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-faq .faq-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 2.4rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: end;
    gap: 3rem;
  }

  .page-faq .faq-hero__side {
    padding-bottom: 0.4rem;
  }

  .page-faq .faq-body__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 3.2rem;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 7rem;
    border-bottom: 0;
    padding-bottom: 0;
  }

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

  .page-faq .faq-toc__list a {
    border: 0;
    border-bottom: 1px solid var(--mist);
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    padding: 0.78rem 0 0.78rem 0.55rem;
    font-size: 0.94rem;
    white-space: normal;
    transition: border-left-color 0.2s var(--ease), padding-left 0.2s var(--ease), color 0.2s var(--ease);
  }

  .page-faq .faq-toc__list a:hover,
  .page-faq .faq-toc__list a:focus-visible {
    border-left-color: var(--signal);
    background: transparent;
    padding-left: 0.85rem;
  }

  .page-faq .faq-support__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    align-items: start;
    gap: 3rem;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 3.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-hero__index a,
  .page-faq .faq-step a,
  .page-faq .faq-toc__list a,
  .page-faq .faq-links a,
  .page-faq .faq-qa__mark::after,
  .page-faq .faq-qa {
    transition: none;
  }

  .page-faq .faq-links a:hover {
    transform: none;
  }
}