/* FAQ 独立分类页：左侧列表可独立滚动，避免条目过多撑高整页 */
.kb-layout {
  grid-template-columns: 300px 1fr;
}

.kb-system-nav {
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 320px);
  padding: 12px 0 0;
  overflow: hidden;
}

.kb-system-nav-title {
  flex: 0 0 auto;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px;
  padding: 0 16px 10px;
  margin: 0;
}

.kb-system-nav-title .faq-side-count {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-gray);
  white-space: nowrap;
}

.faq-side-empty {
  padding: 24px 20px;
  color: var(--text-gray);
  font-size: 13px;
  text-align: center;
}

.faq-cat-list {
  flex: 1 1 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 8px 12px;
  overflow-x: hidden;
  overflow-y: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.faq-cat-list::-webkit-scrollbar {
  width: 6px;
}

.faq-cat-list::-webkit-scrollbar-thumb {
  background: rgba(15, 39, 71, 0.2);
  border-radius: 3px;
}

.faq-cat-btn {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--text-dark);
  font-size: 13px;
  line-height: 1.45;
  padding: 8px 10px;
  border-radius: 8px;
  cursor: pointer;
  text-decoration: none;
}

.faq-cat-name {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-weight: 600;
}

.faq-cat-btn:hover {
  background: rgba(23, 101, 140, 0.06);
  color: var(--primary-blue);
}

.faq-cat-btn.active {
  background: rgba(23, 101, 140, 0.1);
  color: var(--primary-blue);
}

.faq-empty {
  padding: 48px 24px;
  text-align: center;
  color: var(--text-gray);
  font-size: 15px;
  line-height: 1.7;
  background: #fafbfc;
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  margin-top: 8px;
}

.faq-empty strong {
  display: block;
  color: var(--text-dark);
  font-size: 1.15rem;
  margin-bottom: 8px;
}

.faq-case-group {
  margin-bottom: 16px;
}

.faq-case-group__title {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-dark);
}

.faq-case-links {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
}

.faq-case-links li {
  border-top: 1px solid var(--border-color);
}

.faq-case-links li:first-child {
  border-top: 0;
}

.faq-case-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 13px 18px;
  font-size: 14px;
  color: var(--text-dark);
  text-decoration: none;
}

.faq-case-link:hover {
  background: rgba(23, 101, 140, 0.05);
  color: var(--primary-blue);
}

.faq-case-kind {
  display: inline-block;
  margin-right: 8px;
  padding: 1px 6px;
  border-radius: 3px;
  font-size: 11px;
  font-weight: 600;
  vertical-align: middle;
  background: rgba(23, 101, 140, 0.1);
  color: var(--primary-blue);
}

.faq-case-kind--problem {
  background: rgba(180, 136, 44, 0.15);
  color: #9a6b12;
}

.faq-text-detail {
  margin-top: 8px;
  padding: 22px 24px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: #fafbfc;
}

.faq-text-detail__head {
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-color);
}

.faq-text-detail__head h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 10px;
  line-height: 1.45;
}

.faq-text-detail__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.faq-text-tag {
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 4px;
  background: #fff;
  border: 1px solid var(--border-color);
  color: var(--text-gray);
}

.faq-text-article {
  font-size: 15px;
  color: var(--text-gray);
  line-height: 1.9;
}

.faq-text-article p {
  margin: 0 0 1em;
}

.faq-text-article p:last-child {
  margin-bottom: 0;
}

.faq-text-article ol,
.faq-text-article ul {
  margin: 0 0 1em;
  padding-left: 1.4em;
}

.faq-text-article b,
.faq-text-article strong {
  color: var(--text-dark);
  font-weight: 600;
}

.faq-text-back {
  display: inline-block;
  margin-top: 16px;
  padding: 0;
  border: none;
  background: none;
  font-size: 14px;
  color: var(--primary-blue);
  cursor: pointer;
}

.faq-text-back:hover {
  text-decoration: underline;
}

@media (max-width: 991px) {
  .kb-layout {
    grid-template-columns: 1fr;
  }

  .kb-system-nav {
    position: static;
    max-height: min(42vh, 360px);
  }
}