.page-faq {
  --faq-rail: 244px;
}

.page-faq .faq-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(1.75rem, 4vw, 3rem);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 6% 0%, rgba(46, 127, 212, 0.30), transparent 60%),
    radial-gradient(85% 75% at 95% 8%, rgba(53, 230, 210, 0.13), transparent 66%);
}

.page-faq .faq-hero__kicker {
  margin: 0 0 0.8rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-faq .faq-hero h1 {
  margin: 0 0 1rem;
  max-width: 20ch;
  font-size: clamp(2rem, 6.4vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--mist);
}

.page-faq .faq-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(0.98rem, 2.4vw, 1.08rem);
  line-height: 1.8;
  color: var(--mist);
  opacity: 0.82;
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 1.75rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 2rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--slate);
}

.page-faq .faq-hero__meta b {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gold);
}

.page-faq .faq-body {
  padding-block: clamp(2rem, 5vw, 3.5rem);
}

.page-faq .faq-layout {
  display: grid;
  gap: 2.25rem;
  min-width: 0;
}

/* 步骤轨道 */
.page-faq .faq-track {
  min-width: 0;
}

.page-faq .faq-track__title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-track__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.4rem;
  display: flex;
  gap: 0.6rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-track__item {
  flex: 0 0 auto;
}

.page-faq .faq-track__link {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(15, 42, 68, 0.5);
  color: var(--mist);
  font-size: 0.88rem;
  line-height: 1.3;
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 0.25s var(--ease), transform 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-track__node {
  flex: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line-neon);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.64rem;
  color: var(--gold);
}

.page-faq .faq-track__link--done .faq-track__node {
  background: var(--neon);
  border-color: var(--neon);
  color: var(--deep-sea);
  font-weight: 600;
}

.page-faq .faq-track__link:hover,
.page-faq .faq-track__link:focus-visible {
  border-color: var(--line-neon);
  background: rgba(15, 42, 68, 0.72);
  transform: translateY(-2px);
}

/* 问答分组 */
.page-faq .faq-groups {
  min-width: 0;
}

.page-faq .faq-group {
  padding-block: clamp(1.5rem, 4vw, 2.5rem);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 1.25rem);
}

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

.page-faq .faq-group .section__head {
  margin-bottom: 1.4rem;
}

.page-faq .faq-group .section__title {
  font-size: clamp(1.45rem, 4vw, 2.1rem);
  line-height: 1.2;
  color: var(--mist);
}

.page-faq .faq-group .section__lead {
  max-width: 58ch;
  color: var(--slate);
  font-size: 0.96rem;
  line-height: 1.8;
}

.page-faq .faq-figure {
  margin: 0 0 1.5rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: rgba(15, 42, 68, 0.4);
}

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

.page-faq .faq-figure .figure__caption {
  padding: 0.7rem 0.95rem;
  border-top: 1px solid var(--line);
  font-size: 0.78rem;
  color: var(--slate);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.7rem;
  margin: 0;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(10, 13, 18, 0.5);
  transition: border-color 0.25s var(--ease), background-color 0.25s var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 230, 210, 0.32);
}

.page-faq .faq-item[open] {
  border-color: var(--line-neon);
  background: rgba(15, 42, 68, 0.55);
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 1.05rem;
  font-size: 0.98rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--mist);
}

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

.page-faq .faq-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1.25;
  color: var(--neon);
}

.page-faq .faq-item[open] summary::after {
  content: "−";
  color: var(--gold);
}

.page-faq .faq-item summary:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: 2px;
}

.page-faq .faq-item__body {
  padding: 0 1.05rem 1.05rem;
  color: var(--slate);
  font-size: 0.93rem;
  line-height: 1.8;
}

.page-faq .faq-item__body p {
  margin: 0;
}

.page-faq .faq-next {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.8rem;
  padding-bottom: 1px;
  font-size: 0.84rem;
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid var(--line-neon);
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-faq .faq-next:hover,
.page-faq .faq-next:focus-visible {
  color: var(--gold);
  border-bottom-color: rgba(242, 193, 78, 0.5);
}

.page-faq .faq-sub {
  margin: 1.9rem 0 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.16em;
  color: var(--gold);
}

/* 版本数据条 */
.page-faq .faq-stats {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--line);
}

.page-faq .faq-stats .stat {
  padding: 1rem 1.1rem;
  background: rgba(10, 13, 18, 0.62);
}

.page-faq .faq-stats .stat__value {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 600;
  color: var(--gold);
}

.page-faq .faq-stats .stat__label {
  display: block;
  margin-top: 0.3rem;
  font-size: 0.78rem;
  color: var(--slate);
}

/* 尾部联系区 */
.page-faq .faq-group--cta {
  border-top: 1px solid var(--line);
}

.page-faq .faq-cta {
  display: grid;
  gap: 1.25rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
  border: 1px solid var(--line-neon);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 120% at 0% 0%, rgba(46, 127, 212, 0.28), transparent 62%),
    rgba(15, 42, 68, 0.5);
}

.page-faq .faq-cta__title {
  margin: 0;
  font-size: clamp(1.35rem, 3.6vw, 1.95rem);
  line-height: 1.25;
  color: var(--mist);
}

.page-faq .faq-cta__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--slate);
}

.page-faq .faq-cta__grid {
  display: grid;
  gap: 1rem;
}

.page-faq .faq-cta__item {
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-cta__label {
  display: block;
  margin-bottom: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate);
}

.page-faq .faq-cta__value {
  color: var(--mist);
  font-size: 0.95rem;
  line-height: 1.6;
  word-break: break-word;
}

.page-faq .faq-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-faq .faq-note {
  margin: 0;
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--slate);
}

@media (min-width: 760px) {
  .page-faq .faq-cta__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

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

  .page-faq .faq-track__inner {
    position: sticky;
    top: calc(var(--topbar-h) + 1.5rem);
  }

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

  .page-faq .faq-track__item {
    flex: 1 1 auto;
    width: 100%;
  }

  .page-faq .faq-track__link {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1px solid transparent;
    border-left: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    white-space: normal;
  }

  .page-faq .faq-track__link:hover,
  .page-faq .faq-track__link:focus-visible {
    transform: none;
    border-left-color: var(--neon);
    background: rgba(15, 42, 68, 0.45);
  }

  .page-faq .faq-track__link--done {
    border-left-color: var(--gold);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-track__link,
  .page-faq .faq-item,
  .page-faq .faq-next {
    transition: none;
  }

  .page-faq .faq-track__link:hover,
  .page-faq .faq-track__link:focus-visible {
    transform: none;
  }
}