.page-faq {
  --faq-rail-w: 236px;
  --faq-gap: clamp(1.25rem, 2.6vw, 2.5rem);
  color: var(--mist);
  padding-block: clamp(1.5rem, 3.4vw, 2.5rem) clamp(3rem, 7vw, 6rem);
}

/* ---------- 首屏 ---------- */
.page-faq .faq-intro {
  display: grid;
  gap: 1rem;
  padding-bottom: clamp(1.75rem, 3.5vw, 2.75rem);
  border-bottom: 1px solid var(--line-strong);
}

.page-faq .faq-intro__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7vw, 3.6rem);
  line-height: 1.06;
  letter-spacing: 0.015em;
  color: var(--mist);
  max-width: 16ch;
}

.page-faq .faq-intro__split {
  display: grid;
  gap: 1.15rem;
}

.page-faq .faq-intro__lede {
  margin: 0;
  font-size: clamp(1rem, 1.7vw, 1.125rem);
  line-height: 1.85;
  color: var(--soft-text);
  max-width: 60ch;
}

.page-faq .faq-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 0.7rem;
  padding: 0.5rem 0 0.5rem 0.85rem;
  border-left: 2px solid var(--line-cyan);
  background: linear-gradient(90deg, var(--halo-cyan), transparent 72%);
}

.page-faq .faq-fact__num {
  color: var(--cyan);
  font-size: 1.02rem;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.page-faq .faq-fact__text {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--soft-text);
}

.page-faq .faq-intro__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

/* ---------- 主体骨架 ---------- */
.page-faq .faq-layout {
  display: grid;
  gap: var(--faq-gap);
  margin-top: clamp(2rem, 4vw, 3rem);
}

.page-faq .faq-rail {
  display: grid;
  gap: 0.75rem;
  align-content: start;
  padding: 1rem 1.05rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(14, 42, 64, 0.72), rgba(7, 26, 43, 0.46));
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-rail__label {
  margin: 0;
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-rail__nav {
  display: grid;
  gap: 0.1rem;
}

.page-faq .faq-rail__nav a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.55rem;
  align-items: baseline;
  padding: 0.42rem 0.5rem;
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--soft-text);
  text-decoration: none;
  border-left: 2px solid transparent;
  border-radius: var(--radius);
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease;
}

.page-faq .faq-rail__nav a .mono {
  color: var(--steel);
  font-size: 0.72rem;
}

.page-faq .faq-rail__nav a:hover,
.page-faq .faq-rail__nav a:focus-visible {
  color: var(--cyan);
  border-left-color: var(--cyan);
  background: var(--halo-cyan);
}

.page-faq .faq-rail__nav a:hover .mono,
.page-faq .faq-rail__nav a:focus-visible .mono {
  color: var(--cyan);
}

.page-faq .faq-rail__link--sub {
  padding-left: 1.5rem !important;
  font-size: 0.82rem !important;
}

.page-faq .faq-rail__hint {
  margin: 0;
  padding-top: 0.65rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  line-height: 1.65;
  color: var(--faint-text);
}

.page-faq .faq-content {
  display: grid;
  gap: clamp(2.25rem, 4.5vw, 3.75rem);
  min-width: 0;
}

.page-faq .faq-block {
  display: grid;
  gap: 1.3rem;
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  min-width: 0;
}

/* ---------- 图 ---------- */
.page-faq .faq-figure {
  margin: 0;
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  object-fit: cover;
}

.page-faq .faq-figure__caption {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--faint-text);
}

/* ---------- 四步卡 ---------- */
.page-faq .faq-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.8rem;
}

.page-faq .faq-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.6rem 1rem;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-left: 2px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(160deg, rgba(14, 42, 64, 0.58), rgba(7, 26, 43, 0.32));
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.page-faq .faq-step:hover,
.page-faq .faq-step:focus-within {
  border-left-color: var(--cyan);
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

.page-faq .faq-step__num {
  grid-column: 1;
  grid-row: 1;
  font-size: 1.5rem;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--signal);
}

.page-faq .faq-step__body {
  grid-column: 2;
  min-width: 0;
}

.page-faq .faq-step > .tag {
  grid-column: 2;
  justify-self: start;
}

.page-faq .faq-step__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.page-faq .faq-step__lead {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--soft-text);
}

.page-faq .faq-step__more {
  margin-top: 0.6rem;
}

.page-faq .faq-step__more summary {
  list-style: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

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

.page-faq .faq-step__more summary::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1;
  color: var(--steel);
  transition: color 0.18s ease;
}

.page-faq .faq-step__more[open] summary::before {
  content: "–";
  color: var(--cyan);
}

.page-faq .faq-step__more summary:hover {
  color: var(--mist);
}

.page-faq .faq-step__more ul {
  margin: 0.55rem 0 0;
  padding: 0 0 0 1.05rem;
  display: grid;
  gap: 0.35rem;
}

.page-faq .faq-step__more li {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--soft-text);
}

/* ---------- 提醒条 ---------- */
.page-faq .faq-caution {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  align-items: baseline;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(255, 106, 61, 0.38);
  border-radius: var(--radius);
  background: var(--halo-signal);
}

.page-faq .faq-caution__mark {
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--signal);
}

.page-faq .faq-caution p {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.75;
  color: var(--soft-text);
}

/* ---------- 问答 ---------- */
.page-faq .faq-groups {
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1fr);
}

.page-faq .faq-group {
  display: grid;
  gap: 0.7rem;
  align-content: start;
  padding: 1.05rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(14, 42, 64, 0.38);
  scroll-margin-top: calc(var(--header-h) + 1.25rem);
  min-width: 0;
}

.page-faq .faq-group__title {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-size: 1rem;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-faq .faq-group__title .mono {
  display: inline-grid;
  place-items: center;
  width: 1.55rem;
  height: 1.55rem;
  font-size: 0.75rem;
  color: var(--ink-900);
  background: var(--cyan);
  border-radius: var(--radius);
}

.page-faq .faq-list {
  display: grid;
  gap: 0.55rem;
}

.page-faq .faq-item {
  border-top: 1px solid var(--line);
  padding-top: 0.55rem;
}

.page-faq .faq-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-faq .faq-item summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: center;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--mist);
  transition: color 0.18s ease;
}

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

.page-faq .faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1;
  color: var(--steel);
  transition: color 0.18s ease;
}

.page-faq .faq-item summary:hover {
  color: var(--cyan);
}

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

.page-faq .faq-item[open] summary::after {
  content: "–";
  color: var(--cyan);
}

.page-faq .faq-item__body {
  padding: 0.55rem 0 0.3rem;
}

.page-faq .faq-item__body p {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--soft-text);
}

.page-faq .faq-item__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 常用资料 ---------- */
.page-faq .faq-library {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

.page-faq .faq-library__card {
  display: grid;
  gap: 0.8rem;
  align-content: start;
}

.page-faq .faq-library__card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2.4vw, 1.5rem);
  letter-spacing: 0.03em;
}

.page-faq .faq-library__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.45rem;
}

.page-faq .faq-library__list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.7rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px dashed rgba(43, 33, 24, 0.2);
}

.page-faq .faq-library__list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-library__code {
  font-size: 0.72rem;
  color: rgba(43, 33, 24, 0.55);
}

.page-faq .faq-library__name {
  font-size: 0.9rem;
  color: var(--brown);
}

.page-faq .faq-library__count {
  font-size: 0.72rem;
  color: rgba(43, 33, 24, 0.7);
}

.page-faq .faq-library__note {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(43, 33, 24, 0.78);
}

.page-faq .faq-library__card .btn {
  justify-self: start;
}

/* ---------- 联系支持 ---------- */
.page-faq .faq-contact {
  display: grid;
  gap: 1.25rem;
  align-items: start;
}

.page-faq .faq-contact__panel {
  display: grid;
  gap: 0.85rem;
  align-content: start;
}

.page-faq .faq-contact__panel-title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-faq .faq-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
  counter-reset: faqflow;
}

.page-faq .faq-flow li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--soft-text);
}

.page-faq .faq-flow li::before {
  counter-increment: faqflow;
  content: counter(faqflow, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--signal);
}

.page-faq .faq-contact__panel-note {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.75;
  color: var(--faint-text);
}

.page-faq .faq-contact__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.page-faq .faq-contact__card {
  display: grid;
  gap: 0.85rem;
  padding: 1.2rem 1.15rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(165deg, rgba(18, 57, 84, 0.85), rgba(4, 16, 26, 0.78));
  box-shadow: var(--shadow-soft);
}

.page-faq .faq-contact__row {
  display: grid;
  gap: 0.18rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--line);
  min-width: 0;
}

.page-faq .faq-contact__row:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-faq .faq-contact__label {
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-faq .faq-contact__value {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-faq .faq-contact__hint {
  font-size: 0.78rem;
  line-height: 1.6;
  color: var(--faint-text);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem 1.1rem;
  }
}

@media (min-width: 900px) {
  .page-faq .faq-intro__split {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    align-items: start;
    column-gap: var(--faq-gap);
  }

  .page-faq .faq-library {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    column-gap: var(--faq-gap);
  }

  .page-faq .faq-contact {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: var(--faq-gap);
  }
}

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

  .page-faq .faq-rail {
    position: sticky;
    top: calc(var(--header-h) + 1.25rem);
  }

  .page-faq .faq-step {
    padding: 1.15rem 1.25rem;
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-groups {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem 1.35rem;
  }

  .page-faq .faq-intro__title {
    max-width: 20ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-step,
  .page-faq .faq-rail__nav a,
  .page-faq .faq-item summary {
    transition: none;
  }

  .page-faq .faq-step:hover,
  .page-faq .faq-step:focus-within {
    transform: none;
  }
}
<<<END>>>