.page-faq {
  background:
    radial-gradient(1200px 560px at 8% -12%, rgba(53, 245, 200, 0.10), transparent 62%),
    radial-gradient(900px 460px at 94% 0%, rgba(255, 162, 58, 0.07), transparent 58%),
    var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-faq .faq-shell {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 var(--gutter) clamp(64px, 9vw, 104px);
}

/* ---------- 页首 ---------- */

.page-faq .faq-intro {
  padding: clamp(24px, 5vw, 52px) 0 clamp(24px, 4vw, 40px);
  max-width: 66ch;
}

.page-faq .faq-intro__eyebrow {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mint);
}

.page-faq .faq-intro__title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 5.4vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-intro__lead {
  margin: 0;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

/* ---------- 问题索引 ---------- */

.page-faq .faq-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 49, 42, 0.72), rgba(8, 23, 18, 0.86));
  overflow: hidden;
  margin-bottom: clamp(40px, 7vw, 76px);
}

.page-faq .faq-index__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index__headtitle {
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--ink-dim);
}

.page-faq .faq-index__headmeta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-faq .faq-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.page-faq .faq-index__cell {
  min-width: 0;
}

.page-faq .faq-index__link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding: 16px 14px;
  background: var(--bg-deep);
  color: var(--ink);
  text-decoration: none;
  transition: background 160ms var(--ease), color 160ms var(--ease);
}

.page-faq .faq-index__link:hover,
.page-faq .faq-index__link:focus-visible {
  background: var(--panel);
  color: var(--mint);
}

.page-faq .faq-index__name {
  font-size: 0.92rem;
  font-weight: 500;
  line-height: 1.4;
}

.page-faq .faq-index__count {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-dim);
}

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

/* ---------- 分组 ---------- */

.page-faq .faq-group {
  padding-top: clamp(36px, 6vw, 68px);
  scroll-margin-top: 110px;
}

.page-faq .faq-group__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: clamp(20px, 3vw, 30px);
}

.page-faq .faq-group__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-group__count {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--amber);
  white-space: nowrap;
}

/* ---------- 插图 ---------- */

.page-faq .faq-figure {
  position: relative;
  margin: 0 0 clamp(24px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-deep);
  overflow: hidden;
}

.page-faq .faq-figure--band {
  margin: clamp(36px, 6vw, 68px) 0 0;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.06);
}

.page-faq .faq-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 245, 200, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 245, 200, 0.07) 1px, transparent 1px);
  background-size: 72px 72px;
  mix-blend-mode: screen;
}

.page-faq .faq-figure__caption {
  padding: 12px 16px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--ink-dim);
}

/* ---------- 折叠条目 ---------- */

.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.page-faq .faq-item {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(18, 49, 42, 0.55), rgba(8, 23, 18, 0.72));
  overflow: hidden;
  transition: border-color 180ms var(--ease);
}

.page-faq .faq-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--mint);
  opacity: 0;
  transition: opacity 180ms var(--ease);
}

.page-faq .faq-item:hover {
  border-color: rgba(53, 245, 200, 0.4);
}

.page-faq .faq-item[open] {
  border-color: rgba(53, 245, 200, 0.5);
}

.page-faq .faq-item[open]::before {
  opacity: 1;
}

.page-faq .faq-item__q {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 20px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
  transition: color 160ms var(--ease);
}

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

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

.page-faq .faq-item__q:hover {
  color: var(--mint);
}

.page-faq .faq-item__q::after {
  content: "+";
  margin-left: auto;
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1;
  color: var(--mint);
}

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

.page-faq .faq-item__idx {
  flex: none;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--amber-deep);
}

.page-faq .faq-item[open] .faq-item__idx {
  color: var(--amber);
}

.page-faq .faq-item__text {
  min-width: 0;
}

.page-faq .faq-item__a {
  padding: 0 20px 20px 52px;
  font-size: 0.95rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

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

.page-faq .faq-item[open] .faq-item__a {
  animation: faq-reveal 240ms var(--ease);
}

.page-faq .faq-item__a a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-faq .faq-item__a a:hover {
  color: var(--mint-soft);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-size: 0.92em;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

/* ---------- 收尾 ---------- */

.page-faq .faq-outro {
  margin-top: clamp(44px, 7vw, 80px);
  padding: clamp(24px, 4vw, 40px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(600px 260px at 0% 0%, rgba(53, 245, 200, 0.12), transparent 70%),
    linear-gradient(180deg, rgba(18, 49, 42, 0.8), rgba(8, 23, 18, 0.9));
}

.page-faq .faq-outro__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--ink);
}

.page-faq .faq-outro__text {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--ink-dim);
}

.page-faq .faq-outro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@keyframes faq-reveal {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-faq .faq-index__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }

  .page-faq .faq-index__link {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
    padding: 20px 18px;
  }

  .page-faq .faq-item__q {
    padding: 18px 24px;
  }

  .page-faq .faq-item__a {
    padding: 0 24px 22px 60px;
  }
}

@media (min-width: 1024px) {
  .page-faq .faq-intro {
    padding-top: clamp(40px, 6vw, 72px);
  }

  .page-faq .faq-figure--band {
    max-width: 100%;
  }
}

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

  .page-faq .faq-item[open] .faq-item__a {
    animation: none;
  }
}