/* ==========================================================================
   ad-ops-agent 知识库样式 (M2 S3)
   沿用 main.css 的 CSS 变量(蓝主色 + dark mode + WCAG AA)
   风格:Linear / Notion · 卡片化 · 16-24px 间距 · 8-12px 圆角
   ========================================================================== */

/* ==========================================================================
   主页:知识库入口卡(渐变蓝紫,跟 S4 进度卡同高,放最显眼位置)
   ========================================================================== */

.kb-entry-card {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  text-decoration: none;
  color: #fff;
  background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  padding: var(--space-lg) var(--space-xl);
  margin-bottom: var(--space-lg);
  box-shadow: var(--shadow-md);
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
  position: relative;
  overflow: hidden;
}

.kb-entry-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(
    circle at top right,
    rgba(255, 255, 255, 0.15) 0%,
    transparent 60%
  );
  pointer-events: none;
}

.kb-entry-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255, 255, 255, 0.2);
  text-decoration: none;
  color: #fff;
}

.kb-entry-icon {
  font-size: 48px;
  line-height: 1;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.15));
}

.kb-entry-content {
  flex: 1;
  min-width: 0;
}

.kb-entry-content h3 {
  margin: 0 0 4px 0;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
}

.kb-entry-content p {
  margin: 0 0 6px 0;
  font-size: 0.875rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.92);
}

.kb-entry-content p strong {
  color: #fff;
  font-weight: 700;
  font-size: 1.125rem;
  padding: 0 2px;
}

.kb-entry-tags {
  font-size: 0.75rem !important;
  color: rgba(255, 255, 255, 0.7) !important;
  letter-spacing: 0.3px;
  margin-top: 4px !important;
}

.kb-entry-arrow {
  font-size: 32px;
  opacity: 0.7;
  flex-shrink: 0;
  transition: transform 0.2s, opacity 0.2s;
}

.kb-entry-card:hover .kb-entry-arrow {
  transform: translateX(4px);
  opacity: 1;
}

/* 媒体分布小条(可选,显示在入口卡里) */
.kb-entry-stats {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 10px;
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.85);
}

.kb-entry-stat {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 12px;
  font-weight: 500;
}

/* ==========================================================================
   知识库 badge(媒体 / 维度 / 行业)
   用品牌识别色,S2 报告 §6.3 建议
   ========================================================================== */

.kb-badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.2px;
  white-space: nowrap;
}

/* 媒体品牌色(亮色) */
.kb-badge-media-巨量 { background: #000000; color: #fff; }
.kb-badge-media-百度 { background: #2932e1; color: #fff; }
.kb-badge-media-腾讯 { background: #007bff; color: #fff; }
.kb-badge-media-快手 { background: #ff4906; color: #fff; }

/* 维度(灰色) */
.kb-badge-dimension {
  background: #6b7280;
  color: #fff;
}

/* 行业(暖色) */
.kb-badge-industry {
  background: #f59e0b;
  color: #000;
}

[data-bs-theme="dark"] .kb-badge-industry {
  background: #fbbf24;
  color: #000;
}

/* source_type 小标 */
.kb-badge-source {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-weight: 500;
}

/* ==========================================================================
   chip 筛选(媒体 / 维度 / 行业)
   ========================================================================== */

.kb-chip-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
}

.kb-chip-group-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-right: 4px;
  min-width: 36px;
}

.kb-chip {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 16px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-card);
  color: var(--color-text);
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  margin: 0;
  user-select: none;
  transition: all 0.2s;
  line-height: 1.5;
}

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

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

/* 媒体 chip 选中时用品牌色(更直观) */
.kb-chip.kb-chip-media.active[data-value="巨量"] { background: #000000; border-color: #000000; }
.kb-chip.kb-chip-media.active[data-value="百度"] { background: #2932e1; border-color: #2932e1; }
.kb-chip.kb-chip-media.active[data-value="腾讯"] { background: #007bff; border-color: #007bff; }
.kb-chip.kb-chip-media.active[data-value="快手"] { background: #ff4906; border-color: #ff4906; }

/* ==========================================================================
   知识卡片(列表页)
   ========================================================================== */

.kb-card-modern {
  display: block;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  transition: all 0.2s;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  position: relative;
}

.kb-card-modern:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: var(--color-primary);
  text-decoration: none;
  color: inherit;
}

.kb-card-badges {
  display: flex;
  gap: 6px;
  margin-bottom: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.kb-card-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-text);
  margin: 0 0 8px 0;
  line-height: 1.4;
}

.kb-card-content-preview {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 10px;
}

.kb-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.kb-card-tags {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
  flex: 1;
  min-width: 0;
}

.kb-card-tag {
  display: inline-block;
  padding: 1px 8px;
  background: var(--color-bg-hover);
  color: var(--color-text-muted);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
}

.kb-card-source-link {
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.75rem;
  font-weight: 500;
  white-space: nowrap;
  margin-left: 8px;
}

.kb-card-source-link:hover {
  text-decoration: underline;
}

/* 加载状态 spinner 容器 */
.kb-list-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xl);
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

/* 结果计数 */
.kb-list-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-md);
  font-size: 0.8125rem;
  color: var(--color-text-muted);
}

.kb-list-meta-count {
  font-weight: 500;
}

.kb-list-meta-count strong {
  color: var(--color-primary);
  font-weight: 700;
}

/* ==========================================================================
   列表页布局(左侧 sidebar 筛选)
   ========================================================================== */

.kb-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.kb-sidebar {
  position: sticky;
  top: calc(56px + var(--space-md)); /* navbar 高 + 间距 */
  align-self: start;
  max-height: calc(100vh - 56px - var(--space-md) - var(--space-md));
  overflow-y: auto;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.kb-sidebar-title {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin: 0 0 var(--space-sm) 0;
}

.kb-sidebar-section {
  margin-bottom: var(--space-lg);
}

.kb-sidebar-section:last-child {
  margin-bottom: 0;
}

.kb-sidebar-search {
  width: 100%;
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 9px 12px 9px 36px;
  font-size: 0.875rem;
  font-family: inherit;
  transition: border-color 0.2s, box-shadow 0.2s;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%236b7280' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'><circle cx='11' cy='11' r='8'/><line x1='21' y1='21' x2='16.65' y2='16.65'/></svg>");
  background-repeat: no-repeat;
  background-position: 12px center;
}

.kb-sidebar-search:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-soft);
}

.kb-reset-btn {
  width: 100%;
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.kb-reset-btn:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

/* 移动端 */
@media (max-width: 768px) {
  .kb-layout {
    grid-template-columns: 1fr;
  }
  .kb-sidebar {
    position: static;
    max-height: none;
  }
}

/* ==========================================================================
   详情页布局
   ========================================================================== */

.kb-detail-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.kb-meta-sticky {
  position: sticky;
  top: calc(56px + var(--space-md));
  align-self: start;
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
}

.kb-meta-section {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.kb-meta-section:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.kb-meta-label {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 6px;
}

.kb-meta-value {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.5;
  word-break: break-word;
}

.kb-meta-value a {
  color: var(--color-primary);
  text-decoration: none;
  word-break: break-all;
}

.kb-meta-value a:hover {
  text-decoration: underline;
}

.kb-meta-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  align-items: center;
}

.kb-meta-tag-cloud {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.kb-meta-tag {
  display: inline-block;
  padding: 2px 8px;
  background: var(--color-bg-hover);
  color: var(--color-text-muted);
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 500;
}

/* 详情页正文区 */
.kb-detail-main {
  min-width: 0;
}

.kb-detail-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-md) 0;
  line-height: 1.4;
}

.kb-detail-toolbar {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  align-items: center;
  flex-wrap: wrap;
}

.kb-copy-btn {
  background: var(--color-bg-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 12px;
  font-size: 0.8125rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.kb-copy-btn:hover {
  background: var(--color-bg-hover);
  border-color: var(--color-border-strong);
}

.kb-copy-btn.copied {
  background: var(--color-success);
  color: #fff;
  border-color: var(--color-success);
}

.kb-detail-content {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  line-height: 1.8;
  font-size: 0.9375rem;
  color: var(--color-text);
  white-space: pre-wrap;
  word-wrap: break-word;
  word-break: break-word;
}

/* 上下篇导航 */
.kb-prev-next {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.kb-prev-next-item {
  display: block;
  padding: var(--space-md);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  color: inherit;
  transition: all 0.2s;
}

.kb-prev-next-item:hover {
  border-color: var(--color-primary);
  text-decoration: none;
  color: inherit;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.kb-prev-next-item.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.kb-prev-next-label {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
}

.kb-prev-next-title {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}

.kb-prev-next-item.next {
  text-align: right;
}

@media (max-width: 768px) {
  .kb-detail-layout {
    grid-template-columns: 1fr;
  }
  .kb-meta-sticky {
    position: static;
  }
  .kb-prev-next {
    grid-template-columns: 1fr;
  }
  .kb-prev-next-item.next {
    text-align: left;
  }
}

/* ==========================================================================
   面包屑 / 顶栏返回区
   ========================================================================== */

.kb-back-bar {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
  color: var(--color-text-muted);
}

.kb-back-link {
  color: var(--color-text-muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
}

.kb-back-link:hover {
  background: var(--color-bg-hover);
  color: var(--color-text);
  text-decoration: none;
}

.kb-back-sep {
  color: var(--color-border-strong);
}