.page-faq {
  --faq-rail: 244px;
  display: block;
  background: var(--ink);
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 3.2rem) 0 3rem;
  background:
    radial-gradient(120% 100% at 90% -10%, rgba(124, 92, 255, 0.24), transparent 58%),
    radial-gradient(90% 90% at 0% 110%, rgba(34, 224, 214, 0.16), transparent 62%),
    var(--ink);
}

.page-faq .faq-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(42, 53, 96, 0.42) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 53, 96, 0.42) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(to bottom, #000 22%, transparent 92%);
  mask-image: linear-gradient(to bottom, #000 22%, transparent 92%);
}

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

.page-faq .faq-eyebrow {
  margin: 1.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-title {
  margin: 0.75rem 0 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.9rem, 5.4vw, 3.4rem);
  line-height: 1.14;
  letter-spacing: -0.006em;
  color: var(--white);
}

.page-faq .faq-lede {
  margin: 1.15rem 0 0;
  max-width: 62ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 0.7rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-quick li {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--line);
  background: rgba(20, 27, 58, 0.62);
  font-size: 0.82rem;
  color: var(--muted);
}

.page-faq .faq-quick .mono {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--cyan);
}

/* ---------- 主体网格 ---------- */
.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 2.2rem;
  padding-top: 2.6rem;
  padding-bottom: 4.5rem;
}

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

/* ---------- 主题索引 ---------- */
.page-faq .faq-rail-title {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0 0 0.4rem;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-faq .faq-rail-list > .index-item {
  flex: 0 0 auto;
}

.page-faq .faq-rail-list .index-rail-link {
  display: flex;
  align-items: baseline;
  gap: 0.55rem;
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--text);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-rail-list .index-num {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-faq .faq-rail-list .index-rail-link:hover {
  color: var(--white);
  border-color: var(--cyan-line);
}

.page-faq .faq-rail-list .index-rail-link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-faq .faq-rail-list .index-rail-link[aria-current="true"] .index-num {
  color: rgba(11, 16, 38, 0.62);
}

/* ---------- 展开全部 ---------- */
.page-faq .faq-tools {
  display: flex;
  justify-content: flex-end;
  margin: 0 0 1.7rem;
}

.page-faq .faq-tools .accordion-all {
  padding: 0.5rem 0.95rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: transparent;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease), background-color 0.18s var(--ease);
}

.page-faq .faq-tools .accordion-all:hover,
.page-faq .faq-tools .accordion-all:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan-line);
  background: var(--cyan-wash);
}

/* ---------- 问答分组 ---------- */
.page-faq .faq-group {
  --accent: var(--cyan);
  position: relative;
  margin: 0 0 3rem;
  padding-top: 1.7rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group--view { --accent: var(--violet); }
.page-faq .faq-group--rank { --accent: var(--gold); }
.page-faq .faq-group--record { --accent: var(--magenta); }
.page-faq .faq-group--device { --accent: var(--felt); }
.page-faq .faq-group--service { --accent: var(--cyan); }

.page-faq .faq-group::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 68px;
  height: 2px;
  background: var(--accent);
}

.page-faq .faq-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.85rem;
  margin-bottom: 1.25rem;
}

.page-faq .faq-group-index {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--fs-section);
  line-height: 1.2;
  color: var(--white);
}

.page-faq .faq-group-note {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--muted);
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-accordion {
  display: block;
}

.page-faq .faq-item {
  margin-bottom: 0.6rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  background: transparent;
  transition: background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-faq .faq-item:hover {
  background: rgba(20, 27, 58, 0.55);
  border-top-color: var(--cyan-line);
  border-right-color: var(--cyan-line);
  border-bottom-color: var(--cyan-line);
}

.page-faq .faq-item:has(.faq-q[aria-expanded="true"]) {
  background: rgba(20, 27, 58, 0.92);
  border-top-color: var(--cyan-line);
  border-right-color: var(--cyan-line);
  border-bottom-color: var(--cyan-line);
}

.page-faq .faq-q-wrap {
  margin: 0;
}

.page-faq .faq-q {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.05rem 1.15rem;
  border: 0;
  background: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  text-align: left;
  cursor: pointer;
  transition: color 0.18s var(--ease);
}

.page-faq .faq-q:focus-visible {
  outline: 1px solid var(--cyan);
  outline-offset: -2px;
}

.page-faq .faq-q-mark {
  position: relative;
  flex: 0 0 auto;
  width: 13px;
  height: 13px;
  margin-top: 0.36rem;
}

.page-faq .faq-q-mark::before,
.page-faq .faq-q-mark::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-faq .faq-q-mark::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 1px;
  transform: translateY(-50%);
}

.page-faq .faq-q-mark::after {
  top: 0;
  left: 50%;
  width: 1px;
  height: 100%;
  transform: translateX(-50%);
}

.page-faq .faq-q[aria-expanded="true"] .faq-q-mark::after {
  opacity: 0;
  transform: translateX(-50%) scaleY(0);
}

.page-faq .faq-a {
  padding: 0 1.15rem 1.2rem;
  border-top: 1px dashed rgba(42, 53, 96, 0.72);
}

.page-faq .faq-a p {
  margin: 0.95rem 0 0;
  max-width: 68ch;
  font-size: 0.94rem;
  line-height: 1.82;
  color: var(--text);
}

.page-faq .faq-num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.94em;
  letter-spacing: 0.01em;
  color: var(--cyan);
}

.page-faq .faq-group--rank .faq-num {
  color: var(--gold);
}

/* ---------- 配图 ---------- */
.page-faq .faq-figure {
  position: relative;
  margin: 1.4rem 0 1.2rem;
  border: 1px solid var(--line);
  background: var(--panel-2);
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-faq .faq-figure .media-cap {
  display: block;
  padding: 0.65rem 0.9rem;
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 分组底部跳转 ---------- */
.page-faq .faq-group-foot {
  display: flex;
  justify-content: flex-end;
  margin-top: 1rem;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line);
}

.page-faq .faq-group-foot .link {
  font-size: 0.83rem;
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-faq .faq-group-foot .link:hover,
.page-faq .faq-group-foot .link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan-line);
}

/* ---------- 结尾提示 ---------- */
.page-faq .faq-outro {
  margin-top: 0.4rem;
  padding: 1.3rem 1.35rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--violet);
  background: linear-gradient(120deg, rgba(124, 92, 255, 0.13), transparent 66%);
}

.page-faq .faq-outro p {
  margin: 0;
  max-width: 62ch;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-outro .faq-outro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1.2rem;
  margin-top: 0.9rem;
}

.page-faq .faq-outro-links .link {
  font-size: 0.83rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-faq .faq-outro-links .link:hover,
.page-faq .faq-outro-links .link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--cyan-line);
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 760px) {
  .page-faq .faq-hero {
    padding: calc(var(--header-h) + 4.2rem) 0 3.6rem;
  }

  .page-faq .faq-lede {
    font-size: 1.05rem;
  }

  .page-faq .faq-q {
    padding: 1.15rem 1.4rem;
    font-size: 1.03rem;
  }

  .page-faq .faq-a {
    padding: 0 1.4rem 1.3rem;
  }

  .page-faq .faq-a p {
    font-size: 0.96rem;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-layout {
    grid-template-columns: var(--faq-rail) minmax(0, 1fr);
    gap: clamp(2.2rem, 4vw, 4rem);
    padding-top: 3.4rem;
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.6rem);
  }

  .page-faq .faq-rail-list {
    display: block;
    overflow: visible;
    padding: 0;
  }

  .page-faq .faq-rail-list > .index-item + .index-item {
    margin-top: 0.1rem;
  }

  .page-faq .faq-rail-list .index-rail-link {
    border: 0;
    border-left: 1px solid var(--line);
    padding: 0.52rem 0.4rem 0.52rem 0.9rem;
    white-space: normal;
  }

  .page-faq .faq-rail-list .index-rail-link:hover {
    color: var(--white);
    border-left-color: var(--cyan-line);
    background: transparent;
  }

  .page-faq .faq-rail-list .index-rail-link[aria-current="true"] {
    color: var(--cyan);
    background: linear-gradient(90deg, rgba(34, 224, 214, 0.14), transparent 72%);
    border-left-color: var(--cyan);
  }

  .page-faq .faq-rail-list .index-rail-link[aria-current="true"] .index-num {
    color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail-list .index-rail-link,
  .page-faq .faq-tools .accordion-all,
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-q-mark::before,
  .page-faq .faq-q-mark::after,
  .page-faq .faq-group-foot .link,
  .page-faq .faq-outro-links .link {
    transition: none;
  }
}