.page-faq {
  --faq-shift: 16px;
  --faq-line: var(--rock);
  background-color: var(--arena-base);
  color: var(--chalk);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: 1.5rem 0 3rem;
  border-bottom: 3px solid var(--rock);
  background:
    radial-gradient(1100px 380px at 82% -10%, rgba(255, 77, 28, 0.16), transparent 65%),
    radial-gradient(760px 320px at 8% 8%, rgba(34, 211, 238, 0.1), transparent 70%),
    var(--arena-base);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 45, 51, 0.85) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 45, 51, 0.7) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.5;
  pointer-events: none;
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
}

.page-faq .faq-hero .container {
  position: relative;
  z-index: 1;
}

.page-faq .breadcrumb {
  margin-bottom: 1.75rem;
}

.page-faq .breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--alloy);
}

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

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

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

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

.page-faq .faq-hero__copy {
  max-width: 44rem;
}

.page-faq .faq-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 6vw, 3.35rem);
  line-height: 1.2;
  letter-spacing: 0.02em;
  margin: 0.75rem 0 1.1rem;
  text-shadow: 5px 5px 0 rgba(255, 77, 28, 0.22);
}

.page-faq .faq-hero .lead {
  font-size: 1rem;
  line-height: 1.8;
  color: #d7d1c7;
  max-width: 38rem;
  margin: 0 0 1.6rem;
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.2rem;
}

.page-faq .faq-hero__meta {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--alloy);
  margin: 0;
  padding-left: 0.9rem;
  border-left: 3px solid var(--lime);
}

.page-faq .faq-hero__figure {
  margin: 0;
  border: 2px solid var(--rock);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-hero__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1400 / 600;
}

.page-faq .faq-hero__figure figcaption {
  padding: 0.85rem 1rem;
  border-top: 2px solid var(--rock);
  font-size: 13px;
  line-height: 1.65;
  color: var(--alloy);
}

/* ---------- 章节通用 ---------- */
.page-faq .section {
  padding: 3rem 0;
}

.page-faq .faq-index {
  background: var(--arena-base);
}

.page-faq .section-head {
  margin-bottom: 1.8rem;
}

.page-faq .eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
  margin: 0 0 0.6rem;
}

.page-faq .section-title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.3rem, 4.2vw, 1.9rem);
  letter-spacing: 0.06em;
  line-height: 1.35;
  margin: 0 0 0.85rem;
  color: var(--chalk);
}

.page-faq .faq-index__lead,
.page-faq .faq-group__intro,
.page-faq .faq-contact .lead {
  font-size: 15px;
  line-height: 1.75;
  color: var(--alloy);
  max-width: 46rem;
  margin: 0;
}

/* ---------- 类别刻度条 ---------- */
.page-faq .faq-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.6rem;
  margin-bottom: 2rem;
  border: 2px solid var(--rock);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-scale__item {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.55rem 0.85rem;
  font-size: 14px;
  color: var(--chalk);
  text-decoration: none;
  border: 2px solid transparent;
  background: rgba(42, 45, 51, 0.5);
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-scale__item em {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--alloy);
}

.page-faq .faq-scale__item:hover,
.page-faq .faq-scale__item:focus-visible {
  border-color: var(--cyan);
  background: rgba(34, 211, 238, 0.08);
}

.page-faq .faq-scale__dot {
  width: 9px;
  height: 9px;
  display: inline-block;
  flex: none;
}

.page-faq .faq-scale__dot--moss { background: var(--moss); }
.page-faq .faq-scale__dot--terracotta { background: var(--terracotta); }
.page-faq .faq-scale__dot--alloy { background: var(--alloy); }

/* ---------- 总览索引 ---------- */
.page-faq .faq-index__body {
  display: grid;
  gap: 1.75rem;
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.page-faq .faq-index__list a {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 0.85rem;
  text-decoration: none;
  color: var(--chalk);
  font-size: 14.5px;
  line-height: 1.5;
  border: 2px solid var(--rock);
  background: var(--panel);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.page-faq .faq-index__num {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--lime);
}

.page-faq .faq-index__cat {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.4rem;
  color: var(--alloy);
  border: 1px solid var(--rock);
}

.page-faq .faq-index__figure {
  margin: 0;
  border: 2px solid var(--rock);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
}

.page-faq .faq-index__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 1000 / 700;
}

.page-faq .faq-index__figure figcaption {
  padding: 0.8rem 1rem;
  border-top: 2px solid var(--rock);
  font-size: 13px;
  line-height: 1.65;
  color: var(--alloy);
}

/* ---------- 分组与卡片 ---------- */
.page-faq .faq-group {
  border-top: 3px solid var(--rock);
  background: linear-gradient(180deg, rgba(23, 25, 29, 0.65), transparent 60%);
}

.page-faq .faq-group__head {
  margin-bottom: 2rem;
  padding-left: 0.9rem;
  border-left: 3px solid var(--terracotta);
}

.page-faq .faq-group__head .eyebrow {
  color: var(--terracotta);
}

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

.page-faq .faq-card {
  border: 2px solid var(--rock);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  scroll-margin-top: 6rem;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.page-faq .faq-card[open] {
  border-color: var(--orange);
}

.page-faq .faq-card:target {
  border-color: var(--cyan);
  outline: 2px solid rgba(34, 211, 238, 0.35);
}

.page-faq .faq-card__summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.9rem;
  padding: 1rem 1rem 1rem 0.85rem;
  cursor: pointer;
  list-style: none;
}

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

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

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

.page-faq .faq-card__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 7vw, 40px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--lime);
}

.page-faq .faq-card__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 15.5px;
  line-height: 1.5;
  letter-spacing: 0.02em;
  margin: 0;
  color: var(--chalk);
}

.page-faq .faq-card__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding: 0.2rem 0.45rem;
  white-space: nowrap;
  color: var(--chalk);
}

.page-faq .faq-card__tag--moss { background: var(--moss); }
.page-faq .faq-card__tag--terracotta { background: var(--terracotta); }
.page-faq .faq-card__tag--alloy { background: #3a4048; color: var(--chalk); }

.page-faq .faq-card__body {
  padding: 0 1rem 1.15rem 1rem;
  border-top: 2px solid var(--rock);
}

.page-faq .faq-card__body p {
  margin: 0.95rem 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: #d9d3c9;
}

.page-faq .faq-card__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.5);
}

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

/* ---------- 联系区 ---------- */
.page-faq .faq-contact {
  border-top: 3px solid var(--rock);
  padding-bottom: 4rem;
}

.page-faq .faq-contact__inner {
  display: grid;
  gap: 1.75rem;
}

.page-faq .faq-contact .lead {
  margin-top: 0.4rem;
}

.page-faq .faq-contact__points {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
  font-size: 14.5px;
  line-height: 1.7;
  color: #d9d3c9;
}

.page-faq .faq-contact__points li {
  padding-left: 0.9rem;
  border-left: 2px solid var(--rock);
}

.page-faq .faq-contact__points a {
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 14px;
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 211, 238, 0.5);
}

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

.page-faq .faq-contact__panel {
  border: 2px solid var(--rock);
  background: var(--panel);
  box-shadow: var(--shadow-hard);
  padding: 1.25rem 1.15rem 1.35rem;
}

.page-faq .faq-contact__panel-title {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 15px;
  letter-spacing: 0.08em;
  margin: 0 0 1rem;
  color: var(--chalk);
}

.page-faq .faq-contact__steps {
  list-style: none;
  margin: 0 0 1.25rem;
  padding: 0;
  display: grid;
  gap: 0.75rem;
}

.page-faq .faq-contact__steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.7rem;
  align-items: start;
  font-size: 14px;
  line-height: 1.65;
  color: #d9d3c9;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--rock);
}

.page-faq .faq-contact__steps li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact__step {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  color: var(--arena-base);
  background: var(--lime);
  width: 1.5rem;
  height: 1.5rem;
  display: inline-grid;
  place-items: center;
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1rem;
}

.page-faq .faq-contact__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--alloy);
  padding-left: 0.8rem;
  border-left: 3px solid var(--moss);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-hero {
    padding-top: 2rem;
  }

  .page-faq .section {
    padding: 4rem 0;
  }

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

  .page-faq .faq-stack {
    gap: 1.25rem;
  }

  .page-faq .faq-card__summary {
    padding: 1.15rem 1.15rem 1.15rem 1rem;
  }

  .page-faq .faq-card__title {
    font-size: 16.5px;
  }
}

/* ---------- 桌面：双列错位 ---------- */
@media (min-width: 960px) {
  .page-faq .faq-hero {
    padding: 2.25rem 0 4rem;
  }

  .page-faq .faq-hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 3rem;
  }

  .page-faq .faq-hero__figure {
    margin-top: 0.5rem;
  }

  .page-faq .faq-index__body {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 2.5rem;
  }

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

  .page-faq .faq-stack {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.75rem 2.5rem;
    padding: 0 1rem 0.5rem;
  }

  .page-faq .faq-card:nth-child(odd) {
    transform: translateX(calc(var(--faq-shift) * -1));
  }

  .page-faq .faq-card:nth-child(even) {
    transform: translateX(var(--faq-shift));
    margin-top: 2rem;
  }

  .page-faq .faq-card:hover,
  .page-faq .faq-card:focus-within {
    transform: translateY(-2px);
  }

  .page-faq .faq-card:nth-child(odd):hover,
  .page-faq .faq-card:nth-child(odd):focus-within {
    transform: translateX(calc(var(--faq-shift) * -1)) translateY(-2px);
  }

  .page-faq .faq-card:nth-child(even):hover,
  .page-faq .faq-card:nth-child(even):focus-within {
    transform: translateX(var(--faq-shift)) translateY(-2px);
  }

  .page-faq .faq-contact__inner {
    grid-template-columns: 5fr 7fr;
    gap: 3rem;
    align-items: start;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-hero__grid {
    grid-template-columns: 6fr 6fr;
  }

  .page-faq .faq-index__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-card,
  .page-faq .faq-card:hover,
  .page-faq .faq-card:focus-within,
  .page-faq .faq-index__list a,
  .page-faq .faq-scale__item {
    transition: none;
    transform: none;
  }
}