.page-faq {
  --faq-tabs-h: 52px;
  background: var(--c-paper);
  color: var(--c-ink);
}

.page-faq .faq-crumb {
  padding-top: 20px;
  padding-bottom: 4px;
}

/* ---------- 首屏 ---------- */
.page-faq .faq-hero {
  background: var(--c-navy);
  color: #fff;
  padding: 40px 0 48px;
  border-bottom: 3px solid var(--c-green);
}

.page-faq .faq-hero__inner {
  display: grid;
  gap: 28px;
}

.page-faq .faq-hero__title {
  margin: 16px 0 0;
  font-size: clamp(30px, 6vw, var(--fs-xl));
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 20em;
}

.page-faq .faq-hero__sub {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-on-dark);
}

.page-faq .faq-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-faq .faq-hero__rail {
  border: 1px solid var(--line-light);
  border-top: 3px solid var(--c-orange);
  background: var(--c-navy-2);
  padding: 20px 18px 8px;
}

.page-faq .faq-rail__label {
  margin: 0 0 12px;
  font-size: var(--fs-tag);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-orange);
}

.page-faq .faq-rail__list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-faq .faq-rail__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px solid var(--line-light);
}

.page-faq .faq-rail__list li:first-child {
  border-top: 0;
}

.page-faq .faq-rail__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.08em;
  color: var(--c-cyan);
}

.page-faq .faq-rail__list a {
  color: #fff;
  font-size: var(--fs-s);
  line-height: 1.5;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-faq .faq-rail__list a:hover,
.page-faq .faq-rail__list a:focus-visible {
  color: var(--c-orange);
  border-bottom-color: var(--c-orange);
}

/* ---------- 主题标签条 ---------- */
.page-faq .faq-tabs {
  position: sticky;
  top: calc(var(--header-h) + var(--nav-h));
  z-index: 6;
  background: var(--c-paper);
  border-bottom: 1px solid var(--line);
}

.page-faq .faq-tabs__inner {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-faq .faq-tabs__inner::-webkit-scrollbar {
  display: none;
}

.page-faq .faq-tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 14px;
  font-size: var(--fs-s);
  font-weight: 700;
  color: var(--text-soft);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 3px solid transparent;
}

.page-faq .faq-tab:hover,
.page-faq .faq-tab:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-green);
}

.page-faq .faq-tab:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: -2px;
}

/* ---------- 主题分区 ---------- */
.page-faq .faq-topic {
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--line-soft);
  scroll-margin-top: calc(var(--header-h) + var(--nav-h) + var(--faq-tabs-h) + 8px);
}

.page-faq .faq-topic--mist {
  background: var(--c-mist);
}

.page-faq .faq-topic__head {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  align-items: baseline;
  margin-bottom: 24px;
}

.page-faq .faq-topic__num {
  font-family: var(--font-mono);
  font-size: var(--fs-m);
  font-weight: 700;
  line-height: 1;
  color: var(--c-orange);
}

.page-faq .faq-topic__title {
  grid-column: 2;
  margin: 0;
  font-size: clamp(22px, 4.4vw, var(--fs-l));
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-faq .faq-topic__note {
  grid-column: 2;
  margin: 8px 0 0;
  font-size: var(--fs-s);
  line-height: 1.6;
  color: var(--text-soft);
}

.page-faq .faq-topic__split {
  display: grid;
  gap: 24px;
}

.page-faq .faq-topic__main {
  min-width: 0;
}

.page-faq .faq-topic__aside {
  min-width: 0;
}

/* ---------- 折叠问答 ---------- */
.page-faq .faq-q {
  border-left: 2px solid var(--line);
  background: transparent;
  margin: 0 0 2px;
}

.page-faq .faq-q[open] {
  border-left-color: var(--c-green);
  background: rgba(15, 163, 107, 0.05);
}

.page-faq .faq-q__summary {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  min-height: 44px;
  padding: 15px 14px 15px 16px;
  cursor: pointer;
  font-size: var(--fs-body);
  font-weight: 700;
  line-height: 1.5;
  color: var(--c-ink);
  list-style: none;
}

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

.page-faq .faq-q__summary::marker {
  content: "";
}

.page-faq .faq-q__summary::after {
  content: "+";
  margin-left: auto;
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: var(--fs-m);
  line-height: 1;
  color: var(--c-green);
}

.page-faq .faq-q[open] .faq-q__summary::after {
  content: "\2212";
  color: var(--c-orange);
}

.page-faq .faq-q__summary:focus-visible {
  outline: 2px solid var(--c-orange);
  outline-offset: -2px;
}

.page-faq .faq-q__body {
  padding: 0 16px 18px 16px;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-q__body p {
  margin: 0 0 10px;
  max-width: 38em;
}

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

.page-faq .faq-link {
  color: var(--c-green-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 1px solid var(--c-green);
}

.page-faq .faq-link:hover,
.page-faq .faq-link:focus-visible {
  color: var(--c-action);
  border-bottom-color: var(--c-action);
}

/* ---------- 图示 ---------- */
.page-faq .faq-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--c-paper);
}

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

.page-faq .faq-figure__cap {
  padding: 10px 12px;
  border-top: 1px solid var(--line-soft);
  font-size: var(--fs-tag);
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--text-soft);
}

/* ---------- 文档分类 ---------- */
.page-faq .faq-docs {
  margin-top: 32px;
  border-top: 2px solid var(--c-green);
  padding-top: 22px;
}

.page-faq .faq-docs__total {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0 0 16px;
}

.page-faq .faq-docs__num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 6vw, var(--fs-xl));
  font-weight: 700;
  line-height: 1;
  color: var(--c-orange);
}

.page-faq .faq-docs__unit {
  font-size: var(--fs-s);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--text-soft);
}

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

.page-faq .faq-docgrid__item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 4px 12px;
  padding: 15px 16px 17px;
  background: var(--c-paper);
}

.page-faq .faq-docgrid__name {
  font-size: var(--fs-body);
  font-weight: 700;
  line-height: 1.3;
}

.page-faq .faq-docgrid__count {
  font-family: var(--font-mono);
  font-size: var(--fs-m);
  font-weight: 700;
  line-height: 1;
  color: var(--c-green);
}

.page-faq .faq-docgrid__desc {
  grid-column: 1 / -1;
  font-size: var(--fs-tag);
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--text-soft);
}

/* ---------- 侧栏说明牌 ---------- */
.page-faq .faq-note-card {
  border: 1px solid var(--line);
  border-top: 3px solid var(--c-orange);
  background: var(--c-paper);
  padding: 20px 18px;
}

.page-faq .faq-note-card--dark {
  border-color: var(--line-light);
  border-top-color: var(--c-cyan);
  background: var(--c-navy-2);
  color: #fff;
}

.page-faq .faq-note-card__title {
  margin: 0 0 12px;
  font-size: var(--fs-tag);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-orange);
}

.page-faq .faq-note-card--dark .faq-note-card__title {
  color: var(--c-cyan);
}

.page-faq .faq-note-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-note-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-s);
  line-height: 1.75;
  color: var(--text-soft);
}

.page-faq .faq-note-card--dark .faq-note-card__list li {
  color: var(--text-on-dark);
}

.page-faq .faq-note-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--c-green);
}

.page-faq .faq-note-card--dark .faq-note-card__list li::before {
  background: var(--c-orange);
}

/* ---------- 人工支持 ---------- */
.page-faq .faq-final {
  padding: 44px 0 56px;
  background: var(--c-navy);
  color: #fff;
  scroll-margin-top: calc(var(--header-h) + var(--nav-h) + var(--faq-tabs-h) + 8px);
}

.page-faq .faq-final__inner {
  display: grid;
  gap: 26px;
}

.page-faq .faq-final__title {
  margin: 16px 0 0;
  font-size: clamp(22px, 4.6vw, var(--fs-l));
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-faq .faq-final__text {
  margin: 16px 0 0;
  max-width: 36em;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--text-on-dark);
}

.page-faq .faq-final__card {
  border: 1px solid var(--line-light);
  border-left: 3px solid var(--c-green);
  background: var(--c-navy-2);
  padding: 22px 20px;
}

.page-faq .faq-final__card-title {
  margin: 0 0 14px;
  font-size: var(--fs-tag);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--c-orange);
}

.page-faq .faq-final__list {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-faq .faq-final__list li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-s);
  line-height: 1.7;
  color: var(--text-on-dark);
}

.page-faq .faq-final__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 10px;
  height: 2px;
  background: var(--c-green);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-faq .faq-docgrid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-faq .faq-hero {
    padding: 56px 0 60px;
  }

  .page-faq .faq-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(280px, 5fr);
    gap: 48px;
    align-items: start;
  }

  .page-faq .faq-topic {
    padding: 56px 0 60px;
  }

  .page-faq .faq-topic__split {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 420px);
    gap: 36px;
    align-items: start;
  }

  .page-faq .faq-docs {
    margin-top: 40px;
  }

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

  .page-faq .faq-final {
    padding: 60px 0 72px;
  }

  .page-faq .faq-final__inner {
    grid-template-columns: minmax(0, 1.4fr) minmax(300px, 0.9fr);
    gap: 44px;
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-faq .faq-q,
  .page-faq .faq-tab,
  .page-faq .faq-rail__list a {
    transition: none;
  }
}