.page-faq {
  background: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 6vw, 56px) 0 clamp(40px, 7vw, 88px);
  background: linear-gradient(158deg, var(--night) 0%, var(--ink) 68%);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  top: -18%;
  right: -12%;
  width: min(760px, 86vw);
  height: min(540px, 66vw);
  background: linear-gradient(142deg, var(--neon-a22) 0%, rgba(52, 227, 190, 0) 64%);
  clip-path: polygon(22% 0, 100% 0, 100% 74%, 0 100%);
  pointer-events: none;
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--turf-deep) 0 26px,
    var(--turf-mid) 26px 34px
  );
  opacity: 0.7;
}

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

.page-faq .faq-title {
  margin: 16px 0 18px;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.page-faq .faq-lead {
  max-width: 60ch;
  margin: 0;
  color: var(--paper);
  opacity: 0.88;
}

.page-faq .faq-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 32px;
  margin: 34px 0 0;
  padding: 20px 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-faq .faq-stats li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--muted);
}

.page-faq .faq-stats .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--data-yellow);
  letter-spacing: -0.02em;
}

/* ---------- 分类导航 ---------- */
.page-faq .faq-cats {
  position: relative;
  overflow: hidden;
  background: var(--night);
}

.page-faq .faq-cats-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-faq .faq-cats-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
}

.page-faq .faq-cats::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(180deg, rgba(4, 18, 14, 0.72) 0%, rgba(10, 35, 28, 0.9) 100%);
  pointer-events: none;
}

.page-faq .faq-cats-inner {
  position: relative;
  z-index: 2;
}

.page-faq .faq-cats-title {
  margin: 10px 0 26px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-cat-grid {
  gap: 16px;
}

.page-faq .faq-cat {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  background: rgba(238, 245, 241, 0.06);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--d-fast) var(--ease), transform var(--d-fast) var(--ease),
    background var(--d-fast) var(--ease);
}

.page-faq .faq-cat:hover,
.page-faq .faq-cat:focus-visible {
  border-color: var(--neon-a38);
  background: var(--neon-a10);
  transform: translateY(-2px);
}

.page-faq .faq-cat-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--neon-a10);
  color: var(--neon);
}

.page-faq .faq-cat-name {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-faq .faq-cat-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-faq .faq-cat-count {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  color: var(--data-yellow);
}

/* ---------- 主体两栏 ---------- */
.page-faq .faq-body {
  background: var(--night);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
}

.page-faq .faq-index {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--turf-deep);
}

.page-faq .faq-index-title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
}

.page-faq .faq-index-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-index-list li + li {
  border-top: 1px solid var(--line);
}

.page-faq .faq-index-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 4px;
  color: var(--paper);
  text-decoration: none;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: color var(--d-fast) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  color: var(--neon);
}

.page-faq .faq-index-count {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.75rem;
  color: var(--muted);
}

.page-faq .faq-index-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 分组 ---------- */
.page-faq .faq-group + .faq-group {
  margin-top: clamp(40px, 6vw, 72px);
}

.page-faq .band {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 8px 0;
  margin-bottom: 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-faq .band-index {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--data-yellow);
}

.page-faq .band-label {
  font-size: 0.8125rem;
  letter-spacing: 0.12em;
  color: var(--neon);
}

.page-faq .band-rule {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: repeating-linear-gradient(
    90deg,
    var(--turf-deep) 0 16px,
    var(--turf-mid) 16px 20px
  );
}

.page-faq .faq-group-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-group-intro {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--muted);
}

.page-faq .faq-group-figure {
  margin: 0 0 26px;
}

.page-faq .faq-group-figure .figure-media {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
}

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

.page-faq .faq-group-figure .figure-cap {
  margin-top: 10px;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 手风琴 ---------- */
.page-faq .faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-faq .faq-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--turf-mid);
  border-radius: var(--radius-sm);
  background: var(--turf-deep);
  transition: background var(--d-fast) var(--ease), border-color var(--d-fast) var(--ease);
}

.page-faq .faq-item[open] {
  background: var(--night);
  border-left-color: var(--neon);
  border-top-color: var(--line-strong);
  border-right-color: var(--line-strong);
  border-bottom-color: var(--line-strong);
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.65;
}

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

.page-faq .faq-q:focus-visible {
  outline: 2px solid var(--neon);
  outline-offset: -2px;
  border-radius: var(--radius-sm);
}

.page-faq .faq-q-num {
  flex: 0 0 auto;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--data-yellow);
}

.page-faq .faq-q-text {
  flex: 1 1 auto;
}

.page-faq .faq-toggle {
  position: relative;
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  margin-top: 8px;
  margin-left: auto;
}

.page-faq .faq-toggle::before,
.page-faq .faq-toggle::after {
  content: "";
  position: absolute;
  background: var(--neon);
  border-radius: 2px;
  transition: transform var(--d-fast) var(--ease), opacity var(--d-fast) var(--ease);
}

.page-faq .faq-toggle::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 2px;
}

.page-faq .faq-toggle::after {
  left: 6px;
  top: 0;
  width: 2px;
  height: 14px;
}

.page-faq .faq-item[open] .faq-toggle::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .faq-a {
  padding: 0 18px 18px 46px;
}

.page-faq .faq-a p {
  margin: 0 0 14px;
  max-width: 48em;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.88;
}

.page-faq .faq-item[open] .faq-a {
  animation: faqFade var(--d-block) var(--ease) both;
}

@keyframes faqFade {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-faq .faq-jump {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 15px;
  border: 1px solid var(--neon-a22);
  border-radius: var(--radius-pill);
  background: var(--neon-a10);
  color: var(--neon-soft);
  font-size: 0.8125rem;
  text-decoration: none;
  transition: border-color var(--d-fast) var(--ease), color var(--d-fast) var(--ease),
    transform var(--d-fast) var(--ease);
}

.page-faq .faq-jump::after {
  content: "→";
  font-family: var(--font-mono);
}

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

/* ---------- 下一步 ---------- */
.page-faq .faq-next {
  background: var(--ink);
}

.page-faq .faq-next-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 4vw, 44px);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, var(--red-deep) 0%, var(--night) 58%);
}

.page-faq .faq-next-title {
  margin: 10px 0 14px;
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.page-faq .faq-next-text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.88;
}

.page-faq .faq-next-ways {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-next-ways li {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-k {
  flex: 0 0 auto;
  min-width: 72px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--neon);
  padding-top: 3px;
}

.page-faq .faq-v {
  flex: 1 1 200px;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-faq .faq-v.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-faq .faq-next-links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.page-faq .faq-next-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 20px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: rgba(238, 245, 241, 0.06);
  color: var(--paper);
  text-decoration: none;
  transition: border-color var(--d-fast) var(--ease), transform var(--d-fast) var(--ease),
    background var(--d-fast) var(--ease);
}

.page-faq .faq-next-link:hover,
.page-faq .faq-next-link:focus-visible {
  border-color: var(--neon-a38);
  background: var(--neon-a10);
  transform: translateY(-2px);
}

.page-faq .faq-next-link-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--neon);
}

.page-faq .faq-next-link-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
}

.page-faq .faq-next-link-desc {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-a {
    padding-left: 54px;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: minmax(220px, 268px) minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-index {
    position: sticky;
    top: calc(var(--nav-drop) + 20px);
  }

  .page-faq .faq-next-card {
    grid-template-columns: minmax(0, 1fr) minmax(260px, 320px);
    align-items: start;
  }
}

@media (max-width: 560px) {
  .page-faq .faq-stats {
    gap: 10px 20px;
  }

  .page-faq .faq-stats .num {
    font-size: 1.375rem;
  }

  .page-faq .faq-q {
    gap: 10px;
    padding: 14px 14px;
    font-size: 0.9375rem;
  }

  .page-faq .faq-a {
    padding: 0 14px 16px 14px;
  }

  .page-faq .faq-next-card {
    padding: 20px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item[open] .faq-a {
    animation: none;
  }

  .page-faq .faq-cat,
  .page-faq .faq-jump,
  .page-faq .faq-next-link {
    transition: opacity var(--d-fast) linear;
  }

  .page-faq .faq-cat:hover,
  .page-faq .faq-jump:hover,
  .page-faq .faq-next-link:hover {
    transform: none;
  }

  .page-faq .faq-toggle::before,
  .page-faq .faq-toggle::after {
    transition: none;
  }
}