/* ===== Dashboard 风格知识库 ===== */

/* 全局 */
:root {
  --kb-primary: #1976D2;
  --kb-primary-light: #42A5F5;
  --kb-primary-dark: #1565C0;
  --kb-bg: #f5f5f5;
  --kb-card-bg: #ffffff;
  --kb-text: #333333;
  --kb-text-secondary: #666666;
  --kb-border: #e0e0e0;
  --kb-radius: 12px;
  --kb-shadow: 0 2px 8px rgba(0,0,0,0.08);
  --kb-shadow-hover: 0 6px 20px rgba(0,0,0,0.12);
  --kb-tag-concepts: #1976D2;
  --kb-tag-entities: #388E3C;
  --kb-tag-sources: #F57C00;
  --kb-tag-syntheses: #7B1FA2;
}

/* 首页容器 */
.kb-dashboard {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* 问候语区域 */
.kb-greeting {
  margin-bottom: 28px;
}

.kb-greeting h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--kb-text);
  margin: 0 0 8px 0;
}

.kb-greeting p {
  font-size: 15px;
  color: var(--kb-text-secondary);
  margin: 0;
}

/* 搜索框 */
.kb-search {
  margin-bottom: 24px;
}

.kb-search input {
  width: 100%;
  max-width: 600px;
  padding: 12px 20px;
  border: 2px solid var(--kb-border);
  border-radius: 24px;
  font-size: 15px;
  background: var(--kb-card-bg);
  color: var(--kb-text);
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  box-sizing: border-box;
}

.kb-search input:focus {
  border-color: var(--kb-primary);
  box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

.kb-search input::placeholder {
  color: #999;
}

/* 筛选标签 */
.kb-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.kb-filter-btn {
  padding: 6px 16px;
  border: 1.5px solid var(--kb-border);
  border-radius: 20px;
  background: var(--kb-card-bg);
  color: var(--kb-text-secondary);
  font-size: 13px;
  cursor: pointer;
  transition: all 0.2s;
  user-select: none;
}

.kb-filter-btn:hover {
  border-color: var(--kb-primary);
  color: var(--kb-primary);
}

.kb-filter-btn.active {
  background: var(--kb-primary);
  color: #fff;
  border-color: var(--kb-primary);
}

/* 卡片网格 */
.kb-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

/* 卡片 */
.kb-card {
  background: var(--kb-card-bg);
  border-radius: var(--kb-radius);
  box-shadow: var(--kb-shadow);
  padding: 20px;
  transition: transform 0.2s, box-shadow 0.2s;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  border: 1px solid transparent;
}

.kb-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--kb-shadow-hover);
  border-color: var(--kb-primary-light);
}

.kb-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 10px;
}

.kb-card-category {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 8px;
  border-radius: 4px;
  color: #fff;
  flex-shrink: 0;
}

.kb-card-category.concepts { background: var(--kb-tag-concepts); }
.kb-card-category.entities { background: var(--kb-tag-entities); }
.kb-card-category.sources { background: var(--kb-tag-sources); }
.kb-card-category.syntheses { background: var(--kb-tag-syntheses); }

.kb-card-rating {
  font-size: 14px;
  font-weight: 700;
  color: var(--kb-primary);
  background: rgba(25, 118, 210, 0.08);
  padding: 2px 8px;
  border-radius: 6px;
  flex-shrink: 0;
}

.kb-card-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--kb-text);
  margin: 0 0 8px 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-desc {
  font-size: 13px;
  color: var(--kb-text-secondary);
  line-height: 1.6;
  margin-bottom: 14px;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.kb-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.kb-card-tag {
  font-size: 11px;
  color: var(--kb-text-secondary);
  background: #f0f0f0;
  padding: 2px 8px;
  border-radius: 10px;
}

.kb-card-date {
  font-size: 11px;
  color: #999;
  margin-top: 8px;
}

/* 统计栏 */
.kb-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.kb-stat {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--kb-text-secondary);
}

.kb-stat-num {
  font-size: 22px;
  font-weight: 700;
  color: var(--kb-text);
}

/* 侧边栏标签云 */
.kb-sidebar-tags {
  padding: 8px 0;
}

.kb-sidebar-tag {
  display: inline-block;
  padding: 3px 10px;
  margin: 3px;
  border-radius: 12px;
  font-size: 12px;
  background: #f0f0f0;
  color: var(--kb-text-secondary);
  text-decoration: none;
  transition: all 0.2s;
  cursor: pointer;
}

.kb-sidebar-tag:hover {
  background: var(--kb-primary);
  color: #fff;
}

/* 无结果 */
.kb-no-results {
  text-align: center;
  padding: 60px 20px;
  color: var(--kb-text-secondary);
  font-size: 16px;
  grid-column: 1 / -1;
}

/* ===== 响应式 ===== */

/* 平板 ≤1024px */
@media (max-width: 1024px) {
  .kb-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 手机 ≤768px */
@media (max-width: 768px) {
  .kb-dashboard {
    padding: 12px;
  }

  .kb-greeting h1 {
    font-size: 22px;
  }

  .kb-cards {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .kb-card {
    padding: 16px;
  }

  .kb-card-title {
    font-size: 15px;
  }

  .kb-card-desc {
    -webkit-line-clamp: 2;
  }

  .kb-stats {
    gap: 16px;
  }

  .kb-filter-btn {
    font-size: 12px;
    padding: 5px 12px;
  }
}

/* 小手机 ≤480px */
@media (max-width: 480px) {
  .kb-greeting h1 {
    font-size: 20px;
  }

  .kb-card-tag {
    font-size: 10px;
    padding: 1px 6px;
  }

  .kb-stats {
    gap: 12px;
  }

  .kb-stat-num {
    font-size: 18px;
  }
}

/* 隐藏首页默认内容 */
.kb-dashboard ~ .md-content__inner {
  display: none;
}

/* 排序按钮 */
.kb-sort-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-size: 13px;
  color: var(--kb-text-secondary);
}

.kb-sort-btn {
  padding: 4px 12px;
  border: 1px solid var(--kb-border);
  border-radius: 6px;
  background: transparent;
  color: var(--kb-text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
}

.kb-sort-btn:hover,
.kb-sort-btn.active {
  background: var(--kb-primary);
  color: #fff;
  border-color: var(--kb-primary);
}