.page-faq {
  --faq-rail-w: 240px;
  --faq-group: var(--flag-blue);
  padding-bottom: clamp(48px, 8vw, 96px);
}

/* 首屏 */
.page-faq .faq-hero {
  padding-block: clamp(20px, 3.4vw, 40px) clamp(26px, 4vw, 46px);
  border-bottom: 1px solid var(--line-soft);
}

.page-faq .faq-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-size: clamp(30px, 7vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.page-faq .faq-hero__lead {
  margin: 16px 0 0;
  max-width: 60ch;
  font-size: clamp(14px, 1.6vw, 16px);
  line-height: 1.9;
  color: var(--mist);
}

.page-faq .faq-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-faq .faq-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-mid);
  border-left: 1px solid var(--line-mid);
}

.page-faq .faq-stat {
  padding: 14px 16px;
  border-right: 1px solid var(--line-mid);
  border-bottom: 1px solid var(--line-mid);
}

.page-faq .faq-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 800;
  line-height: 1.1;
  color: var(--cold);
}

.page-faq .faq-stat__label {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-faq .faq-flags {
  display: flex;
  gap: 3px;
  height: 4px;
  margin-top: 30px;
}

.page-faq .faq-flags__bar {
  flex: 1;
  border-radius: 1px;
}

.page-faq .faq-flags__bar--blue { background: var(--flag-blue); }
.page-faq .faq-flags__bar--white { background: var(--snow); }
.page-faq .faq-flags__bar--red { background: var(--signal-red); }
.page-faq .faq-flags__bar--green { background: var(--teal); }
.page-faq .faq-flags__bar--yellow { background: var(--amber); }

/* 布局 */
.page-faq .faq-layout {
  display: grid;
  gap: clamp(24px, 3vw, 44px);
  padding-top: clamp(26px, 4vw, 48px);
}

/* 左侧索引 */
.page-faq .faq-rail {
  border: 1px solid var(--line-mid);
  padding: 16px 16px 18px;
  background:
    linear-gradient(180deg, rgba(59, 130, 246, 0.12), rgba(11, 27, 51, 0) 70%);
}

.page-faq .faq-rail__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 2px;
}

.page-faq .faq-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 8px;
  border-left: 2px solid transparent;
  color: var(--mist);
  font-size: 14px;
  line-height: 1.5;
  text-decoration: none;
  transition: color 200ms var(--ease), background-color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-faq .faq-rail__link:hover,
.page-faq .faq-rail__link:focus-visible {
  color: var(--snow);
  border-left-color: var(--flag-blue);
  background: rgba(59, 130, 246, 0.1);
}

.page-faq .faq-rail__index {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--flag-blue);
}

.page-faq .faq-rail__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line-soft);
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* 分组 */
.page-faq .faq-group {
  scroll-margin-top: calc(var(--header-h) + 20px);
  padding-bottom: clamp(26px, 4vw, 42px);
}

.page-faq .faq-group + .faq-group {
  border-top: 1px solid var(--line-soft);
  padding-top: clamp(24px, 4vw, 40px);
}

.page-faq .faq-group--blue { --faq-group: var(--flag-blue); }
.page-faq .faq-group--teal { --faq-group: var(--teal); }
.page-faq .faq-group--red { --faq-group: var(--signal-red); }
.page-faq .faq-group--amber { --faq-group: var(--amber); }
.page-faq .faq-group--cold { --faq-group: var(--cold); }
.page-faq .faq-group--mist { --faq-group: var(--mist); }

.page-faq .faq-group__head {
  padding-left: 16px;
  border-left: 3px solid var(--faq-group);
  margin-bottom: 16px;
}

.page-faq .faq-group__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--faq-group);
}

.page-faq .faq-group__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.2vw, 27px);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--snow);
}

.page-faq .faq-group__sub {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* 标签带 */
.page-faq .faq-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}

/* 手风琴 */
.page-faq .faq-item {
  border: 1px solid var(--line-soft);
  border-left: 3px solid transparent;
  background: rgba(5, 11, 20, 0.38);
  margin-bottom: 10px;
  transition: border-color 220ms var(--ease), background-color 220ms var(--ease);
}

.page-faq .faq-item[open] {
  border-color: rgba(199, 211, 224, 0.3);
  border-left-color: var(--faq-group);
  background: rgba(5, 11, 20, 0.62);
}

.page-faq .faq-item > summary {
  list-style: none;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
  cursor: pointer;
  padding: 15px 16px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--snow);
}

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

.page-faq .faq-item > summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--faq-group);
  transition: transform 260ms var(--ease);
}

.page-faq .faq-item[open] > summary::after {
  content: "–";
}

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

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

.page-faq .faq-item__body {
  padding: 13px 16px 16px;
  border-top: 1px dashed var(--line-soft);
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

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

.page-faq .faq-inline-link {
  color: var(--cold);
  text-decoration: underline;
  text-decoration-color: rgba(221, 243, 255, 0.4);
  text-underline-offset: 3px;
}

.page-faq .faq-inline-link:hover {
  text-decoration-color: var(--cold);
}

/* 图文 */
.page-faq .faq-figure {
  margin: 16px 0 0;
  padding: 8px;
  border: 1px solid var(--line-mid);
  background: var(--paper);
}

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

.page-faq .faq-figure figcaption {
  padding: 8px 2px 2px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--night);
}

/* 尾部入口 */
.page-faq .faq-more {
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid var(--line-mid);
  background:
    linear-gradient(120deg, rgba(59, 130, 246, 0.16), rgba(24, 169, 153, 0.08) 58%, rgba(11, 27, 51, 0) 100%);
}

.page-faq .faq-more__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3vw, 25px);
  font-weight: 800;
  color: var(--snow);
}

.page-faq .faq-more__text {
  margin: 10px 0 0;
  max-width: 56ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-faq .faq-more__links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.page-faq .faq-chip {
  display: inline-block;
  padding: 8px 14px;
  border: 1px solid var(--line-mid);
  font-size: 13.5px;
  line-height: 1.4;
  color: var(--snow);
  text-decoration: none;
  transition: background-color 200ms var(--ease), border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-faq .faq-chip:hover,
.page-faq .faq-chip:focus-visible {
  background: rgba(59, 130, 246, 0.16);
  border-color: var(--flag-blue);
  color: var(--cold);
}

/* 平板与桌面 */
@media (min-width: 768px) {
  .page-faq .faq-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-faq .faq-item > summary {
    padding: 17px 20px;
    font-size: 15.5px;
  }

  .page-faq .faq-item__body {
    padding: 15px 20px 18px;
  }
}

@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) + 16px);
  }

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

  .page-faq .faq-figure {
    max-width: 560px;
  }
}

@media (min-width: 1200px) {
  .page-faq {
    --faq-rail-w: 264px;
  }

  .page-faq .faq-item__body {
    padding-right: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-rail__link,
  .page-faq .faq-item,
  .page-faq .faq-chip,
  .page-faq .faq-item > summary::after {
    transition: none;
  }
}
<<<PAGE_CSS_END>>>