.page-faq {
  --faq-gap: clamp(22px, 4vw, 44px);
  --faq-pad: clamp(28px, 5vw, 64px);
  background:
    linear-gradient(180deg, rgba(7, 26, 47, .96) 0%, rgba(27, 34, 43, .96) 62%, var(--deep) 100%);
  color: var(--ink);
  padding-bottom: clamp(36px, 6vw, 80px);
  overflow-x: hidden;
}

.page-faq a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq a:hover {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

.page-faq .btn {
  border-bottom: 0;
}

.page-faq .crumb {
  margin: 0 0 clamp(18px, 3vw, 30px);
}

.page-faq .crumb a {
  color: var(--muted);
  border-bottom-color: transparent;
}

.page-faq .crumb a:hover {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding: var(--faq-pad) 0 clamp(30px, 5vw, 56px);
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px) 0 0 / 72px 72px,
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px) 0 0 / 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 82%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .95), transparent 82%);
  pointer-events: none;
}

.page-faq .faq-hero-inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-faq .faq-hero-title {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(2rem, 6.4vw, 3.6rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  margin: .12em 0 0;
}

.page-faq .faq-hero-title em {
  font-style: normal;
  color: var(--cyan);
  display: block;
}

.page-faq .faq-hero-lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 46ch;
  color: var(--muted);
}

.page-faq .faq-hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
}

.page-faq .faq-hero-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(20px, 3vw, 28px) 0 0;
}

.page-faq .faq-hero-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--graphite);
  position: relative;
  overflow: hidden;
}

.page-faq .faq-hero-figure::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan) 55%, transparent);
}

.page-faq .faq-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

/* ---------- 分类索引 ---------- */
.page-faq .faq-index {
  padding: clamp(28px, 4.6vw, 52px) 0;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-index-inner {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
}

.page-faq .faq-index-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 18px;
  margin-bottom: 16px;
}

.page-faq .faq-index-title {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(1.2rem, 3vw, 1.55rem);
  margin: 0;
  letter-spacing: -.01em;
}

.page-faq .faq-index-meta {
  margin: 0;
  font-family: var(--ff-mono);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: .04em;
}

.page-faq .faq-index-meta .stat-num {
  color: var(--cyan);
}

.page-faq .faq-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-faq .faq-index-list > li {
  display: flex;
}

.page-faq .faq-index-link {
  flex: 1;
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  background: var(--graphite);
  color: var(--ink);
  border-bottom: 0;
  border-left: 2px solid transparent;
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq .faq-index-link:hover,
.page-faq .faq-index-link:focus-visible {
  background: var(--panel);
  border-left-color: var(--cyan);
  color: var(--ink);
}

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

.page-faq .faq-index-list > li:first-child .faq-index-link {
  border-left-color: var(--orange);
}

.page-faq .faq-index-num {
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: .06em;
}

.page-faq .faq-index-name {
  font-size: 15px;
  font-weight: 600;
}

.page-faq .faq-index-count {
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: 11px;
  color: var(--muted);
  white-space: nowrap;
}

.page-faq .faq-index-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  overflow: hidden;
}

.page-faq .faq-index-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 4;
}

/* ---------- 连续画布 ---------- */
.page-faq .faq-canvas {
  display: grid;
  gap: var(--faq-gap);
  padding: clamp(32px, 5vw, 68px) 0 clamp(28px, 4vw, 52px);
}

.page-faq .faq-rail-title {
  margin: 0 0 12px;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  color: var(--muted);
}

.page-faq .faq-rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.page-faq .faq-rail-link {
  display: block;
  padding: 7px 11px;
  font-size: 13px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease), background var(--fast) var(--ease);
}

.page-faq .faq-rail-link:hover,
.page-faq .faq-rail-link:focus-visible {
  color: var(--ink);
  border-color: var(--line-cyan);
  background: rgba(35, 240, 208, .07);
}

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

/* ---------- 问答组 ---------- */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--bar-h) + 24px);
}

.page-faq .faq-group + .faq-group {
  margin-top: clamp(34px, 5vw, 62px);
  padding-top: clamp(30px, 4.4vw, 52px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-group-num {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-group-title {
  font-family: var(--ff-serif);
  font-weight: 700;
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  letter-spacing: -.01em;
  margin: 0;
}

.page-faq .faq-group-note {
  margin: 10px 0 4px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.page-faq .qa-item {
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .qa-q {
  margin: 0;
  font-size: inherit;
  font-weight: inherit;
}

.page-faq .qa-toggle {
  width: 100%;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 15px 2px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--ink);
  font-family: var(--ff-sans);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  transition: color var(--fast) var(--ease);
}

.page-faq .qa-toggle:hover {
  color: var(--cyan);
}

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

.page-faq .qa-mark {
  flex: 0 0 auto;
  font-family: var(--ff-mono);
  font-size: 11px;
  line-height: 1;
  padding-top: 6px;
  color: var(--orange);
  letter-spacing: .04em;
}

.page-faq .qa-toggle-text {
  flex: 1;
  min-width: 0;
}

.page-faq .qa-plus {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  margin-top: 5px;
}

.page-faq .qa-plus::before,
.page-faq .qa-plus::after {
  content: "";
  position: absolute;
  background: var(--cyan);
  transition: transform var(--mid) var(--ease), opacity var(--mid) var(--ease);
}

.page-faq .qa-plus::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1.5px;
}

.page-faq .qa-plus::after {
  left: 6px;
  top: 0;
  width: 1.5px;
  height: 14px;
}

.page-faq .qa-toggle[aria-expanded="true"] .qa-plus::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-faq .qa-toggle[aria-expanded="true"] {
  color: var(--cyan);
}

.page-faq .qa-body {
  overflow: hidden;
}

.page-faq .qa-inner {
  padding: 0 2px 18px 27px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.75;
}

.page-faq .qa-inner p {
  margin: 0;
}

.page-faq .qa-inner a {
  border-bottom-color: var(--line-cyan);
}

.page-faq .faq-service-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(22px, 3vw, 32px) 0 0;
}

/* ---------- 底部折叠条带 ---------- */
.page-faq .faq-note {
  margin-top: clamp(18px, 3vw, 30px);
  padding-top: clamp(22px, 3.4vw, 36px);
  border-top: 1px solid var(--line);
}

.page-faq .faq-note-fold {
  border: 1px solid var(--line);
  background: var(--graphite);
}

.page-faq .faq-note-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px 14px;
  padding: 14px 16px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  color: var(--ink);
  font-family: var(--ff-sans);
  border-left: 2px solid var(--orange);
  transition: background var(--fast) var(--ease);
}

.page-faq .faq-note-toggle:hover {
  background: var(--panel);
}

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

.page-faq .faq-note-label {
  font-family: var(--ff-mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
}

.page-faq .faq-note-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.page-faq .faq-note-chev {
  margin-left: auto;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform var(--mid) var(--ease), border-color var(--fast) var(--ease);
}

.page-faq .faq-note-toggle[aria-expanded="true"] .faq-note-chev {
  transform: rotate(-135deg);
  border-color: var(--cyan);
}

.page-faq .faq-note-body {
  overflow: hidden;
}

.page-faq .faq-note-inner {
  padding: 4px 16px 18px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-faq .faq-note-inner p {
  margin: 0;
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-faq .faq-index-list {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    align-items: end;
  }

  .page-faq .faq-index-inner {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, .55fr);
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-faq .faq-canvas {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: start;
  }

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--bar-h) + 20px);
  }

  .page-faq .faq-rail-list {
    display: block;
    border-left: 1px solid var(--line);
  }

  .page-faq .faq-rail-list > li + li {
    margin-top: 2px;
  }

  .page-faq .faq-rail-link {
    border: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
    padding: 7px 0 7px 14px;
    white-space: normal;
  }

  .page-faq .faq-rail-link:hover,
  .page-faq .faq-rail-link:focus-visible {
    background: none;
    border-left-color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .qa-plus::before,
  .page-faq .qa-plus::after,
  .page-faq .faq-note-chev,
  .page-faq a,
  .page-faq .qa-toggle,
  .page-faq .faq-index-link,
  .page-faq .faq-rail-link {
    transition: none;
  }
}
<<<END>>>