.page-faq {
  --faq-toc-w: 236px;
  --faq-rail: 2px;
  --faq-gap-item: 32px;
  background-color: var(--c-ink);
  color: var(--c-text);
}

.page-faq img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  position: relative;
  padding-top: 36px;
  background-image:
    radial-gradient(120% 90% at 88% 0%, rgba(79, 227, 208, 0.10), transparent 58%),
    radial-gradient(90% 90% at -10% 100%, rgba(255, 106, 26, 0.09), transparent 55%),
    linear-gradient(180deg, var(--c-night) 0%, var(--c-ink) 78%);
  background-repeat: no-repeat;
}

.page-faq .faq-hero-shell {
  position: relative;
}

.page-faq .faq-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 6.2vw, 72px);
  line-height: 1.08;
  letter-spacing: 0.005em;
  margin: 16px 0 0;
  max-width: 16em;
  color: var(--c-text);
}

.page-faq .faq-lede {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--c-text-dim);
}

.page-faq .faq-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px 16px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--c-slate);
}

.page-faq .faq-metric {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-faq .faq-metric-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(38px, 8vw, var(--fs-64));
  line-height: 0.92;
  letter-spacing: -0.01em;
  color: var(--c-text);
}

.page-faq .faq-metric-num--orange {
  color: var(--c-orange);
}

.page-faq .faq-metric-num--cyan {
  color: var(--c-cyan);
}

.page-faq .faq-metric-label {
  font-size: var(--fs-12);
  letter-spacing: 0.06em;
  color: var(--c-muted);
}

.page-faq .faq-hero-media {
  margin: 44px 0 0;
}

.page-faq .faq-hero-media img {
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
}

.page-faq .faq-hero-media .media-caption {
  margin-top: 10px;
  font-size: var(--fs-12);
  color: var(--c-muted);
}

/* ---------- 正文区 ---------- */
.page-faq .faq-body {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-faq .faq-filter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--c-slate);
}

.page-faq .faq-filter-label {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--c-muted);
  text-transform: none;
}

.page-faq .faq-filter-input {
  width: 100%;
  max-width: 420px;
  padding: 12px 14px;
  background-color: var(--c-night);
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
  color: var(--c-text);
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.5;
}

.page-faq .faq-filter-input::placeholder {
  color: var(--c-muted);
}

.page-faq .faq-filter-input:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

.page-faq .faq-filter-note {
  margin: 0;
  font-size: var(--fs-12);
  color: var(--c-muted);
}

.page-faq .faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  margin-top: 36px;
}

/* ---------- 左侧主题目录 ---------- */
.page-faq .faq-toc {
  padding-top: 14px;
  border-top: 1px solid var(--c-slate);
}

.page-faq .faq-toc-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-faq .faq-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
}

.page-faq .faq-toc-list li {
  min-width: 0;
}

.page-faq .faq-toc-list a {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  color: var(--c-text-dim);
  text-decoration: none;
  font-size: var(--fs-14);
  line-height: 1.4;
  transition: color var(--dur-tap) var(--ease);
}

.page-faq .faq-toc-num {
  font-size: var(--fs-12);
  color: var(--c-muted);
}

.page-faq .faq-toc-list a:hover,
.page-faq .faq-toc-list a:focus-visible {
  color: var(--c-cyan);
}

.page-faq .faq-toc-list a.is-active {
  color: var(--c-orange);
}

.page-faq .faq-toc-list a.is-active .faq-toc-num {
  color: var(--c-orange);
}

/* ---------- 问答流 ---------- */
.page-faq .faq-flow {
  min-width: 0;
}

.page-faq .faq-group + .faq-group {
  margin-top: 56px;
}

.page-faq .faq-group-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 14px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--c-slate);
}

.page-faq .faq-group-index {
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  background-image: var(--grad-brand);
  background-repeat: no-repeat;
  background-size: 100% 2px;
  background-position: 0 100%;
}

.page-faq .faq-group-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 3.4vw, var(--fs-28));
  line-height: 1.25;
  color: var(--c-text);
}

.page-faq .faq-group-count {
  margin-left: auto;
  font-size: var(--fs-12);
  color: var(--c-muted);
  white-space: nowrap;
}

.page-faq .faq-list {
  display: block;
}

.page-faq .faq-item {
  border-left: var(--faq-rail) solid var(--c-slate);
  padding-left: 14px;
  transition: border-color var(--dur-tap) var(--ease);
}

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

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

.page-faq .faq-q {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: 14px;
  padding: 20px 0 14px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-16);
  line-height: 1.5;
  color: var(--c-text);
  transition: color var(--dur-tap) var(--ease);
}

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

.page-faq .faq-q::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: var(--fs-20);
  line-height: 1;
  font-weight: 400;
  color: var(--c-muted);
  padding-top: 2px;
}

.page-faq .faq-item[open] > .faq-q::after {
  content: "−";
  color: var(--c-cyan);
}

.page-faq .faq-q:hover,
.page-faq .faq-q:focus-visible {
  color: var(--c-cyan);
}

.page-faq .faq-a {
  padding: 0 0 22px;
}

.page-faq .faq-a p {
  margin: 0;
  max-width: 68ch;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--c-text-dim);
}

.page-faq .faq-field {
  display: inline-block;
  margin: 0 4px 2px 0;
  padding: 1px 6px;
  font-size: 0.86em;
  line-height: 1.6;
  color: var(--c-text);
  background-color: rgba(79, 227, 208, 0.10);
  border-bottom: 1px solid rgba(79, 227, 208, 0.40);
  border-radius: 2px;
}

/* ---------- 兜底联络 ---------- */
.page-faq .faq-contact {
  background-color: var(--c-moss);
  border-top: 1px solid var(--c-slate);
  padding-top: 56px;
  padding-bottom: 64px;
}

.page-faq .faq-contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
}

.page-faq .faq-contact-media {
  margin: 0;
  max-width: 420px;
}

.page-faq .faq-contact-media img {
  width: 100%;
  object-fit: cover;
  border: 1px solid var(--c-slate);
  border-radius: var(--radius);
}

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

.page-faq .faq-contact-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(24px, 4vw, var(--fs-40));
  line-height: 1.15;
  color: var(--c-text);
}

.page-faq .faq-contact-lede {
  margin: 18px 0 0;
  max-width: 60ch;
  font-size: var(--fs-16);
  line-height: 1.78;
  color: var(--c-text-dim);
}

.page-faq .faq-channels {
  margin: 28px 0 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-faq .faq-channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 16px;
  padding-top: 14px;
  border-top: 1px solid rgba(233, 238, 235, 0.16);
}

.page-faq .faq-channel dt {
  grid-column: 1 / -1;
}

.page-faq .faq-channel dd {
  margin: 0;
  min-width: 0;
  overflow-wrap: anywhere;
  font-size: var(--fs-14);
  color: var(--c-text);
}

.page-faq .faq-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- 窄屏微调 ---------- */
@media (max-width: 419px) {
  .page-faq .faq-metrics {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .page-faq .faq-metric {
    flex-direction: row;
    align-items: baseline;
    gap: 12px;
  }

  .page-faq .faq-metric-num {
    font-size: var(--fs-40);
  }
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding-top: 52px;
  }

  .page-faq .faq-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-faq .faq-body {
    padding-top: 64px;
    padding-bottom: 96px;
  }

  .page-faq .faq-layout {
    grid-template-columns: var(--faq-toc-w) minmax(0, 1fr);
    gap: 72px;
    margin-top: 48px;
    align-items: start;
  }

  .page-faq .faq-toc {
    position: sticky;
    top: 84px;
  }

  .page-faq .faq-toc-list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 2px;
  }

  .page-faq .faq-toc-list a {
    display: flex;
    width: 100%;
    padding: 10px 0;
    border-bottom: 1px solid var(--c-slate);
  }

  .page-faq .faq-item {
    padding-left: 20px;
  }

  .page-faq .faq-q {
    font-size: var(--fs-20);
    padding: 24px 0 16px;
  }

  .page-faq .faq-group + .faq-group {
    margin-top: 72px;
  }

  .page-faq .faq-contact {
    padding-top: 88px;
    padding-bottom: 88px;
  }

  .page-faq .faq-contact-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 64px;
    align-items: center;
  }

  .page-faq .faq-contact-media {
    max-width: none;
  }

  .page-faq .faq-channels {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (min-width: 1200px) {
  .page-faq .faq-layout {
    gap: 88px;
  }

  .page-faq .faq-contact-grid {
    gap: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-item,
  .page-faq .faq-q,
  .page-faq .faq-toc-list a {
    transition: none;
  }
}
<<<END>>>