.page-faq {
  --faq-axis-w: 104px;
  --faq-line: rgba(36, 75, 92, 0.85);
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
}

@media (min-width: 900px) {
  .page-faq {
    --faq-axis-w: 132px;
  }
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(1.5rem, 4vw, 2.75rem) clamp(2.5rem, 6vw, 4.5rem);
}

.page-faq .faq-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 96px 96px;
  opacity: 0.22;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 88%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), transparent 88%);
}

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

.page-faq .faq-hero__title {
  margin: 0.6rem 0 0;
  max-width: 22ch;
}

.page-faq .faq-hero__lead {
  margin: 1rem 0 0;
  max-width: 60ch;
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  line-height: 1.8;
  color: var(--text);
}

.page-faq .faq-hero__meta {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 0.6rem;
  font-size: 0.72rem;
  letter-spacing: 0.02em;
}

.page-faq .faq-hero__meta li {
  border: 1px solid var(--faq-line);
  background: var(--surface);
  color: var(--sage);
  padding: 0.3rem 0.55rem;
}

.page-faq .faq-hero__figure {
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
}

.page-faq .faq-hero__figure .frame-figure__media {
  aspect-ratio: 7 / 4;
}

/* ---------- 对照板 ---------- */
.page-faq .faq-compare-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 1.25rem;
  margin-top: clamp(2rem, 5vw, 3rem);
}

.page-faq .faq-compare-head__title {
  margin: 0;
}

.page-faq .faq-compare-head__hint {
  margin: 0;
  font-size: 0.72rem;
  color: var(--amber);
  letter-spacing: 0.04em;
}

.page-faq .faq-compare {
  display: grid;
  grid-template-columns: 1fr;
  margin-top: clamp(1.1rem, 3vw, 1.75rem);
  border: 1px solid var(--faq-line);
  background: var(--surface);
  box-shadow: var(--shadow-hard);
}

@media (min-width: 900px) {
  .page-faq .faq-compare {
    grid-template-columns: 1fr var(--faq-axis-w) 1fr;
  }
}

.page-faq .faq-side {
  padding: clamp(1.1rem, 2.5vw, 1.75rem);
  transition: background-color var(--dur) var(--ease);
}

.page-faq .faq-side--old {
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-side:focus {
  outline: none;
}

.page-faq .faq-side:focus-visible {
  outline: 2px solid var(--signal-cyan);
  outline-offset: -3px;
  background: var(--surface-raised);
}

.page-faq .faq-side:focus-within {
  background: var(--surface-raised);
}

@media (min-width: 900px) {
  .page-faq .faq-side--old {
    border-bottom: 0;
    border-right: 1px solid var(--faq-line);
  }
}

.page-faq .faq-side__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.4rem 0.65rem;
}

.page-faq .faq-side__id {
  font-size: 0.7rem;
  color: var(--sage);
  letter-spacing: 0.02em;
}

.page-faq .faq-side__name {
  margin: 0.75rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.6vw, 1.45rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-faq .faq-list {
  display: grid;
  grid-template-columns: minmax(4.25rem, 5.25rem) 1fr;
  gap: 0 0.75rem;
  margin: 1rem 0 0;
  padding: 0;
}

.page-faq .faq-list dt,
.page-faq .faq-list dd {
  padding: 0.6rem 0;
  border-top: 1px dashed var(--line-soft);
}

.page-faq .faq-list dt:first-of-type,
.page-faq .faq-list dd:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-list dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--sage);
  letter-spacing: 0.02em;
}

.page-faq .faq-list dd {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--text);
}

.page-faq .faq-side--old .faq-list dt {
  color: var(--amber);
}

.page-faq .faq-side--new .faq-list dt {
  color: var(--signal-cyan);
}

/* 中间刻度轴 */
.page-faq .faq-axis {
  position: relative;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-around;
  gap: 0.5rem;
  padding: 0.85rem 0.9rem;
  background: var(--ink-950);
  border-top: 1px solid var(--faq-line);
  border-bottom: 1px solid var(--faq-line);
}

.page-faq .faq-axis::before {
  content: "";
  position: absolute;
  left: 1.5rem;
  right: 1.5rem;
  top: 50%;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), var(--signal-cyan));
  opacity: 0.5;
}

@media (min-width: 900px) {
  .page-faq .faq-axis {
    flex-direction: column;
    justify-content: center;
    padding: 1rem 0.4rem;
    border-top: 0;
    border-bottom: 0;
    border-left: 1px solid var(--faq-line);
    border-right: 1px solid var(--faq-line);
  }

  .page-faq .faq-axis::before {
    left: 50%;
    right: auto;
    top: 2.25rem;
    bottom: 2.25rem;
    width: 1px;
    height: auto;
    background: linear-gradient(180deg, var(--amber), var(--signal-cyan));
  }
}

.page-faq .faq-axis__node {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  min-width: 4.5rem;
  padding: 0.35rem 0.5rem;
  text-align: center;
  background: var(--ink-950);
  border: 1px solid var(--faq-line);
}

.page-faq .faq-axis__no {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-faq .faq-axis__no--cyan {
  color: var(--signal-cyan);
}

.page-faq .faq-axis__label {
  font-size: 0.66rem;
  line-height: 1.25;
  color: var(--text-dim);
}

.page-faq .faq-compare__note {
  margin: 1.25rem 0 0;
  max-width: 62ch;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 切换说明 ---------- */
.page-faq .faq-switch .grid-12 {
  align-items: start;
  gap: clamp(1.5rem, 4vw, 2.5rem) 0;
}

.page-faq .faq-switch__title {
  margin: 0.4rem 0 0;
}

.page-faq .faq-switch__lead {
  margin: 1rem 0 0;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-steps {
  display: grid;
  gap: 0.7rem;
  margin-top: clamp(1.25rem, 3vw, 1.75rem);
}

.page-faq .faq-step {
  border: 1px solid var(--faq-line);
  background: var(--surface);
}

.page-faq .faq-step summary {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.85rem 1rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .faq-step summary:hover {
  background: var(--surface-raised);
}

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

.page-faq .faq-step[open] summary {
  background: var(--surface-raised);
}

.page-faq .faq-step__no {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--signal-cyan);
  padding-top: 0.25rem;
  letter-spacing: 0.06em;
}

.page-faq .faq-step__q {
  flex: 1;
  font-size: 0.94rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-step__body {
  padding: 0 1rem 1rem 2.85rem;
}

.page-faq .faq-step__body p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-mark {
  position: relative;
  flex: 0 0 auto;
  width: 0.8rem;
  height: 0.8rem;
  margin-top: 0.4rem;
}

.page-faq .faq-mark::before,
.page-faq .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--sage);
  transition: transform var(--dur) var(--ease);
}

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

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

.page-faq details[open] .faq-mark::after {
  transform: scaleY(0);
}

.page-faq .faq-switch__foot {
  margin: 1.25rem 0 0;
  font-size: 0.86rem;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-faq .faq-switch__figure {
  margin: 0;
}

.page-faq .faq-switch__figure .frame-figure__media {
  aspect-ratio: 10 / 7;
}

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

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--frost);
  border-bottom-color: var(--signal-cyan);
  outline: none;
}

/* ---------- 首次访问路径 ---------- */
.page-faq .faq-start__title {
  margin: 0.4rem 0 0;
}

.page-faq .faq-start__lead {
  margin: 1rem 0 0;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-path {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.75rem;
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  padding: 0;
}

@media (min-width: 820px) {
  .page-faq .faq-path {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.page-faq .faq-path__item {
  position: relative;
  display: grid;
  gap: 0.4rem;
  padding: 1.1rem 1.1rem 1.25rem;
  border: 1px solid var(--faq-line);
  background: var(--surface);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-faq .faq-path__item:hover {
  border-color: var(--line-signal);
  box-shadow: 4px 4px 0 -1px rgba(7, 17, 28, 0.95), 4px 4px 0 0 var(--grid-blue);
}

.page-faq .faq-path__item::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1.3rem;
  width: 0.5rem;
  height: 0.5rem;
  border-top: 1px solid var(--signal-cyan);
  border-right: 1px solid var(--signal-cyan);
  transform: translateX(-50%) rotate(135deg);
}

.page-faq .faq-path__item:last-child::after {
  display: none;
}

@media (min-width: 820px) {
  .page-faq .faq-path__item::after {
    left: auto;
    right: -1.35rem;
    top: 50%;
    bottom: auto;
    transform: translateY(-50%) rotate(45deg);
  }
}

.page-faq .faq-path__no {
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--signal-cyan);
}

.page-faq .faq-path__name {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--text);
}

.page-faq .faq-path__item p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 问答 ---------- */
.page-faq .faq-answers__title {
  margin: 0.4rem 0 0;
}

.page-faq .faq-group {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
}

.page-faq .faq-group__title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--sage);
}

.page-faq .faq-group__title::before {
  content: "";
  width: 1.5rem;
  height: 2px;
  background: var(--signal-cyan);
}

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

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

.page-faq .faq-item summary {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 0.25rem;
  cursor: pointer;
  list-style: none;
  transition: background-color var(--dur) var(--ease);
}

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

.page-faq .faq-item summary:hover {
  background: var(--surface);
}

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

.page-faq .faq-item__q {
  flex: 1;
  font-size: 0.96rem;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text);
}

.page-faq .faq-item__a {
  padding: 0 0.25rem 1.1rem;
  max-width: 72ch;
}

.page-faq .faq-item__a p {
  margin: 0;
  font-size: 0.89rem;
  line-height: 1.85;
  color: var(--mist);
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-support {
  display: grid;
  gap: 1.5rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--faq-line);
  background: var(--surface-raised);
  box-shadow: var(--shadow-hard);
}

@media (min-width: 860px) {
  .page-faq .faq-support {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: 2rem;
  }
}

.page-faq .faq-support__title {
  margin: 0.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.3;
  color: var(--text);
}

.page-faq .faq-support__text {
  margin: 0.85rem 0 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--text);
}

.page-faq .faq-support__note {
  margin: 0.75rem 0 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--sage);
}

.page-faq .faq-support__chips {
  display: grid;
  gap: 0.85rem;
  justify-items: start;
}

.page-faq .chip-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.page-faq .faq-support__time {
  margin: 0;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--amber);
}

.page-faq .faq-support__btn {
  margin-top: 0.15rem;
}

.page-faq .faq-help__foot {
  margin: clamp(1.5rem, 4vw, 2rem) 0 0;
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--text-dim);
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-link,
  .page-faq .faq-side,
  .page-faq .faq-step summary,
  .page-faq .faq-item summary,
  .page-faq .faq-path__item,
  .page-faq .faq-mark::before,
  .page-faq .faq-mark::after {
    transition: none;
  }
}
<<<END>>>