.index__main {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.index__categories {
  flex: 1;
  background: white;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
}

.index__category__title {
  align-items: center;
  display: flex;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--oc-gray-9);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--primary-9);
}

.index__category__title::before {
  content: "📊";
  font-size: 1.5rem;
}

.index__sidebar {
  flex: 0 0 22rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.index__recentThreads {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
}

.index__recentThreads__thread {
  align-items: flex-start;
  display: flex;
  gap: 0.875rem;
  padding: 0.875rem;
  border-radius: 6px;
  transition: background-color 0.2s ease;
  border-left: 3px solid transparent;
}

.index__recentThreads__thread:hover {
  background-color: var(--oc-gray-0);
  border-left-color: var(--primary-6);
}

.index__recentThreads__thread__info {
  flex: 1;
  font-size: 0.875rem;
  line-height: 1.5;
}

.index__recentThreads__thread__title {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 18rem;
  color: var(--oc-gray-9);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.index__recentThreads__thread__meta {
  color: var(--oc-gray-6);
  font-size: 0.75rem;
}

.index__recentThreads__thread__meta a {
  color: var(--oc-gray-7);
  font-weight: 500;
}

.index__recentThreads__thread__meta a:hover {
  color: var(--primary-7);
}

.index__statistics {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  padding: 1.5rem;
}

.index__statistics__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--oc-gray-9);
  margin-bottom: 0.5rem;
}

.index__statistics__list {
  border-radius: 0.5rem;
  display: flex;
  flex-direction: column;
  font-size: 0.875rem;
  width: 100%;
  gap: 0.75rem;
}

.index__statistics__row {
  align-items: center;
  display: flex;
  justify-content: space-between;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--oc-gray-2);
}

.index__statistics__row:last-child {
  border-bottom: none;
}

.index__statistics__label {
  color: var(--oc-gray-7);
  font-weight: 500;
}

.index__statistics__value {
  color: var(--oc-gray-9);
  font-weight: 600;
  font-size: 1rem;
}

.subcategory__latestThread {
  align-items: flex-start;
  display: flex;
  gap: 0.875rem;
  padding: 0.75rem;
  background: var(--oc-gray-0);
  border-radius: 6px;
  margin-top: 0.5rem;
  border-left: 3px solid var(--primary-5);
}

.subcategory__latestThread__info {
  flex: 1;
  font-size: 0.875rem;
  line-height: 1.5;
}

.subcategory__latestThread__info__title {
  display: block;
  max-width: 20rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--oc-gray-9);
  font-weight: 500;
  margin-bottom: 0.25rem;
}

.subcategory__latestThread__info__meta {
  color: var(--oc-gray-6);
  font-size: 0.75rem;
}

/* 分类表格样式优化 */
.category-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1rem 0;
}

.category-table th {
  background-color: var(--oc-gray-1);
  color: var(--oc-gray-7);
  font-weight: 600;
  padding: 1rem;
  text-align: left;
  border-bottom: 2px solid var(--oc-gray-3);
  font-size: 0.875rem;
}

.category-table td {
  padding: 1rem;
  border-bottom: 1px solid var(--oc-gray-2);
  vertical-align: top;
}

.category-table tr:hover {
  background-color: var(--oc-gray-0);
}

.category-name {
  font-weight: 600;
  color: var(--oc-gray-9);
  font-size: 1rem;
}

.category-description {
  color: var(--oc-gray-7);
  font-size: 0.875rem;
  margin-top: 0.25rem;
  line-height: 1.5;
}

/* 空状态提示 */
.index__empty {
  text-align: center;
  padding: 3rem 2rem;
  color: var(--oc-gray-6);
}

.index__empty__icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
}

.index__empty__text {
  font-size: 1rem;
  margin-bottom: 1rem;
}

.index__empty__action {
  color: var(--primary-7);
  font-weight: 500;
}

/* 响应式优化 */
@media screen and (max-width: 1024px) {
  .index__main {
    flex-direction: column;
    gap: 1.25rem;
  }

  .index__sidebar {
    flex: 1;
    width: 100%;
  }

  .index__recentThreads__thread__title {
    max-width: none;
  }

  .subcategory__latestThread__info__title {
    max-width: none;
  }
}

@media screen and (max-width: 768px) {
  .index__categories,
  .index__recentThreads,
  .index__statistics {
    padding: 1rem;
  }

  .index__category__title {
    font-size: 1.125rem;
    padding-bottom: 0.5rem;
  }

  .category-table th,
  .category-table td {
    padding: 0.75rem 0.5rem;
  }

  .index__recentThreads__thread {
    flex-direction: column;
    gap: 0.5rem;
  }

  .index__statistics__row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
}

/* 动画效果 */
.index__recentThreads__thread,
.subcategory__latestThread {
  transition: all 0.2s ease;
}

.index__recentThreads__thread:active,
.subcategory__latestThread:active {
  transform: translateY(1px);
}