/* ============================================================
   app.css — 企业知识库 v1 全局样式
   设计系统 · 布局 · 所有组件样式
   ============================================================ */

/* ── 1. CSS 变量 / 设计令牌 ──────────────────────────────── */
:root {
  --c-primary:        #1A3E6E;
  --c-primary-hover:  #15325A;
  --c-accent:         #2563EB;
  --c-accent-bg:      #EFF6FF;
  --c-accent-border:  #BFDBFE;

  --c-surface:        #FFFFFF;
  --c-surface-2:      #F8FAFC;
  --c-surface-3:      #F1F5F9;

  --c-border:         #E2E8F0;
  --c-border-soft:    #F1F5F9;

  --c-text:           #0F172A;
  --c-text-2:         #334155;
  --c-text-3:         #64748B;
  --c-text-4:         #94A3B8;
  --c-text-inv:       #FFFFFF;

  --c-green:          #059669;
  --c-green-bg:       #ECFDF5;
  --c-green-border:   #A7F3D0;
  --c-amber:          #D97706;
  --c-amber-bg:       #FFFBEB;
  --c-amber-border:   #FDE68A;
  --c-red:            #DC2626;
  --c-red-bg:         #FEF2F2;

  --sidebar-w:        256px;
  --ai-panel-w:       340px;
  --header-h:         52px;
  --radius-sm:        6px;
  --radius-md:        8px;
  --radius-lg:        12px;

  --shadow-sm:        0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:        0 4px 12px rgba(0,0,0,.08);

  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
               "Segoe UI", system-ui, sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, monospace;

  --transition: 0.18s ease;
}
}

/* ── 2. Reset & Base ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 14px; }

body {
  font-family: var(--font-sans);
  background: var(--c-surface-2);
  color: var(--c-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
  height: 100vh;
}

a { color: var(--c-accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

/* ── 3. 根布局（CSS Grid） ──────────────────────────────── */
#kb-app {
  display: grid;
  height: 100vh;
  grid-template-rows: var(--header-h) 1fr;
  grid-template-columns: var(--sidebar-w) 1fr;
  grid-template-areas:
    "header  header"
    "sidebar doc";
}

/* ── 4. Header ──────────────────────────────────────────── */
#kb-header {
  grid-area: header;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  display: flex;
  align-items: center;
  padding: 0 16px 0 0;
  gap: 0;
  z-index: 100;
}

.header-sidebar-slot {
  width: var(--sidebar-w);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  padding: 0 16px;
  border-right: 1px solid var(--c-border);
  height: 100%;
  gap: 10px;
}

.app-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 14px;
  color: var(--c-primary);
}

.logo-mark {
  width: 28px; height: 28px;
  background: var(--c-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  letter-spacing: -0.5px;
  flex-shrink: 0;
}

.logo-badge {
  font-size: 10px;
  font-weight: 600;
  color: var(--c-accent);
  background: var(--c-accent-bg);
  border: 1px solid var(--c-accent-border);
  padding: 1px 6px;
  border-radius: 20px;
  letter-spacing: 0.3px;
}

.header-main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 0 20px;
  height: 100%;
}

.header-breadcrumb {
  display: flex;
  align-items: center;
  gap: 0;
  font-size: 13px;
  color: var(--c-text-3);
}

.hb-sep {
  margin: 0 6px;
  color: var(--c-border);
}

.hb-item:last-child { color: var(--c-text-2); font-weight: 500; }

.header-right {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-icon-btn {
  width: 32px; height: 32px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-text-3);
  transition: background var(--transition), color var(--transition);
}

.header-icon-btn:hover {
  background: var(--c-surface-3);
  color: var(--c-text);
}

.header-divider {
  width: 1px; height: 20px;
  background: var(--c-border);
  margin: 0 4px;
}

.user-area {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 8px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition);
}

.user-area:hover { background: var(--c-surface-3); }

.user-avatar {
  width: 28px; height: 28px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
}

.user-name { font-size: 13px; font-weight: 500; color: var(--c-text-2); }

/* ── 5. Sidebar ─────────────────────────────────────────── */
#kb-sidebar {
  grid-area: sidebar;
  background: var(--c-surface);
  border-right: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* KB 切换器 */
.kb-switcher {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

/* AI知识助手按钮 */
.kb-ai-assistant-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.3);
}

.kb-ai-assistant-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.kb-ai-assistant-btn:active {
  transform: translateY(0);
}

.ai-btn-icon {
  font-size: 16px;
}

.ai-btn-text {
  font-size: 14px;
}

.kb-switcher-tabs {
  display: flex;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 3px;
  gap: 2px;
}

.kb-tab {
  flex: 1;
  padding: 5px 8px;
  border-radius: calc(var(--radius-md) - 2px);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-text-3);
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
  white-space: nowrap;
}

.kb-tab.active {
  background: var(--c-surface);
  color: var(--c-primary);
  font-weight: 600;
  box-shadow: var(--shadow-sm);
}

.kb-tab:not(.active):hover { color: var(--c-text-2); }

.kb-tab.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* 树区域 */
.kb-tree-scroll {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
}

.kb-tree-scroll::-webkit-scrollbar { width: 4px; }
.kb-tree-scroll::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 4px; }

/* 顶级分组 */
.kb-top-level {
  margin-bottom: 4px;
}

.kb-top-level-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
  border-radius: 0;
}

.kb-top-level-header:hover { background: var(--c-surface-2); }

.kb-top-arrow {
  width: 14px; height: 14px;
  color: var(--c-text-4);
  transition: transform var(--transition);
  flex-shrink: 0;
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.kb-top-level.expanded .kb-top-arrow { transform: rotate(90deg); }

.kb-top-icon { font-size: 16px; flex-shrink: 0; }

.kb-top-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text-2);
  letter-spacing: 0.3px;
  flex: 1;
}

/* 顶级分组的子节点容器 */
.kb-top-level-children {
  display: none;
  padding: 2px 0 2px 8px;
}

.kb-top-level.expanded .kb-top-level-children { display: block; }

/* 分类组 */
.kb-category {
  margin-bottom: 2px;
}

.kb-category-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  cursor: pointer;
  user-select: none;
  transition: background var(--transition);
  border-radius: 0;
}

.kb-category-header:hover { background: var(--c-surface-2); }

.kb-cat-arrow {
  width: 14px; height: 14px;
  color: var(--c-text-4);
  transition: transform var(--transition);
  flex-shrink: 0;
  font-size: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.kb-category.expanded .kb-cat-arrow { transform: rotate(90deg); }

.kb-cat-icon { font-size: 14px; flex-shrink: 0; }

.kb-cat-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--c-text-3);
  letter-spacing: 0.3px;
  text-transform: none;
  flex: 1;
}

/* 子节点 */
.kb-category-children {
  display: none;
  padding: 2px 0;
}

.kb-category.expanded .kb-category-children { display: block; }

.kb-leaf {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px 6px 36px;
  cursor: pointer;
  transition: background var(--transition);
  border-radius: 0;
  position: relative;
}

.kb-leaf:hover { background: var(--c-surface-2); }

.kb-leaf.active {
  background: var(--c-accent-bg);
}

.kb-leaf.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0; bottom: 0;
  width: 3px;
  background: var(--c-accent);
  border-radius: 0 2px 2px 0;
}

.kb-leaf-icon { font-size: 13px; flex-shrink: 0; }

.kb-leaf-label {
  font-size: 13px;
  color: var(--c-text-2);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kb-leaf.active .kb-leaf-label {
  color: var(--c-accent);
  font-weight: 600;
}

.kb-leaf-count {
  font-size: 10px;
  color: var(--c-text-4);
  background: var(--c-surface-3);
  padding: 1px 5px;
  border-radius: 10px;
}

.kb-leaf.active .kb-leaf-count {
  background: var(--c-accent-border);
  color: var(--c-accent);
}

/* 侧边栏底部 */
.kb-sidebar-footer {
  border-top: 1px solid var(--c-border);
  padding: 8px 0;
  flex-shrink: 0;
}

.kb-footer-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  font-size: 12.5px;
  color: var(--c-text-3);
  cursor: pointer;
  transition: background var(--transition);
}

.kb-footer-item:hover { background: var(--c-surface-2); color: var(--c-text-2); }

.kb-footer-admin-divider { height: 1px; background: var(--c-border); margin: 4px 12px; }

.kb-admin-entry { text-decoration: none; color: var(--c-text-3); }
.kb-admin-entry:hover { background: var(--c-surface-3) !important; color: var(--c-primary) !important; }

.kb-admin-pill {
  margin-left: auto;
  font-size: 10px;
  font-weight: 700;
  background: var(--c-primary);
  color: #fff;
  padding: 2px 7px;
  border-radius: 20px;
  letter-spacing: 0.2px;
}

.kb-footer-icon { font-size: 13px; }

/* ── 6. 文档阅读区 ──────────────────────────────────────── */
#kb-document {
  grid-area: doc;
  background: var(--c-surface-2);
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

#kb-document::-webkit-scrollbar { width: 6px; }
#kb-document::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 4px; }

/* 欢迎屏 */
.doc-welcome {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 40px 24px;
  text-align: center;
}

.doc-welcome-icon { font-size: 48px; margin-bottom: 16px; opacity: 0.6; }
.doc-welcome-title { font-size: 18px; font-weight: 700; color: var(--c-primary); margin-bottom: 8px; }
.doc-welcome-sub { font-size: 13.5px; color: var(--c-text-3); max-width: 360px; line-height: 1.7; margin-bottom: 28px; }

.doc-welcome-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  width: 100%;
  max-width: 560px;
}

.doc-welcome-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition);
  text-align: left;
}

.doc-welcome-card:hover {
  border-color: var(--c-accent-border);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.doc-wc-icon { font-size: 22px; margin-bottom: 8px; }
.doc-wc-title { font-size: 12.5px; font-weight: 600; color: var(--c-text); margin-bottom: 4px; }
.doc-wc-desc { font-size: 11px; color: var(--c-text-3); line-height: 1.5; }

/* 文档容器 */
.doc-main {
  display: none;
  flex-direction: column;
  min-height: 100%;
}

.doc-main.visible { display: flex; }

/* 文档顶部 meta 区 */
.doc-topbar {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  padding: 20px 28px 16px;
  flex-shrink: 0;
}

.doc-breadcrumb {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--c-text-4);
  margin-bottom: 10px;
}

.doc-breadcrumb span:last-child { color: var(--c-text-3); }
.doc-breadcrumb .sep { color: var(--c-border); }

.doc-title {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1.3;
  margin-bottom: 4px;
}

.doc-subtitle {
  font-size: 13px;
  color: var(--c-text-3);
  margin-bottom: 12px;
}

.doc-meta-row {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.doc-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: var(--c-text-3);
}

.doc-meta-icon { font-size: 12px; }

.doc-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.doc-status-badge.published {
  background: var(--c-green-bg);
  color: var(--c-green);
  border: 1px solid var(--c-green-border);
}

/* 文档标签 */
.doc-tag-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 12px 28px;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border-soft);
}

.doc-tag {
  font-size: 11.5px;
  padding: 3px 10px;
  background: var(--c-surface-3);
  color: var(--c-text-3);
  border-radius: 20px;
  border: 1px solid var(--c-border);
}

/* 文档主体 */
.doc-content-layout {
  display: flex;
  flex: 1;
  gap: 0;
}

/* TOC (目录) */
.doc-toc {
  width: 180px;
  flex-shrink: 0;
  padding: 20px 0 20px 16px;
  position: sticky;
  top: 0;
  align-self: flex-start;
}

.doc-toc-title {
  font-size: 11px;
  font-weight: 700;
  color: var(--c-text-4);
  letter-spacing: 0.8px;
  text-transform: uppercase;
  margin-bottom: 10px;
  padding-left: 10px;
}

.doc-toc-item {
  display: block;
  padding: 5px 10px;
  font-size: 12.5px;
  color: var(--c-text-3);
  border-left: 2px solid var(--c-border);
  transition: all var(--transition);
  cursor: pointer;
  line-height: 1.4;
}

.doc-toc-item:hover { color: var(--c-accent); border-left-color: var(--c-accent-border); }
.doc-toc-item.active { color: var(--c-accent); border-left-color: var(--c-accent); font-weight: 600; }

/* 正文内容区 */
.doc-body-wrap {
  flex: 1;
  padding: 24px 28px 48px;
  max-width: 720px;
  min-width: 0;
}

/* 富文本排版 */
.doc-body h2 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-primary);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--c-border-soft);
  line-height: 1.4;
}

.doc-body h2:first-child { margin-top: 0; }

.doc-body h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-text);
  margin: 24px 0 10px;
}

.doc-body p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--c-text-2);
  margin-bottom: 14px;
}

.doc-body ul, .doc-body ol {
  margin: 8px 0 16px 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--c-text-2);
}

.doc-body li { margin-bottom: 4px; }

.doc-body strong { color: var(--c-text); font-weight: 600; }

/* ── 7. 文서内部知识组件 ──────────────────────────────── */

/* Callout 提示块 */
.kb-callout {
  border-left: 3px solid;
  padding: 12px 16px;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin: 16px 0;
}

.kb-callout-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.5px;
  margin-bottom: 4px;
  text-transform: uppercase;
}

.kb-callout-text { font-size: 13.5px; line-height: 1.7; }

.kb-callout--blue { background: var(--c-accent-bg); border-color: var(--c-accent); }
.kb-callout--blue .kb-callout-label { color: var(--c-accent); }
.kb-callout--blue .kb-callout-text { color: var(--c-text-2); }

.kb-callout--green { background: var(--c-green-bg); border-color: var(--c-green); }
.kb-callout--green .kb-callout-label { color: var(--c-green); }
.kb-callout--green .kb-callout-text { color: var(--c-text-2); }

.kb-callout--amber { background: var(--c-amber-bg); border-color: var(--c-amber); }
.kb-callout--amber .kb-callout-label { color: var(--c-amber); }
.kb-callout--amber .kb-callout-text { color: var(--c-text-2); }

/* 信息网格 */
.kb-info-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 16px 0;
  background: var(--c-border);
}

.kb-info-item {
  background: var(--c-surface);
  padding: 10px 14px;
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.kb-info-key { font-size: 12px; color: var(--c-text-3); width: 100px; flex-shrink: 0; }
.kb-info-val { font-size: 13.5px; color: var(--c-text); font-weight: 500; }

/* 指标卡片 */
.kb-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.kb-metric {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  text-align: center;
}

.kb-metric-num {
  font-size: 22px;
  font-weight: 800;
  color: var(--c-primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.kb-metric-label { font-size: 11.5px; color: var(--c-text-3); }

/* 时间线 */
.kb-timeline { margin: 16px 0; display: flex; flex-direction: column; gap: 0; }

.kb-timeline-item {
  display: flex;
  gap: 16px;
  padding-bottom: 20px;
  position: relative;
}

.kb-timeline-item::before {
  content: '';
  position: absolute;
  left: 80px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--c-border);
}

.kb-timeline-item:last-child::before { display: none; }

.kb-timeline-period {
  width: 80px;
  flex-shrink: 0;
  font-size: 11.5px;
  font-weight: 700;
  color: var(--c-accent);
  padding-top: 2px;
  text-align: right;
}

.kb-timeline-item--current .kb-timeline-period { color: var(--c-green); }

.kb-timeline-body {
  flex: 1;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.7;
  position: relative;
}

.kb-timeline-item--current .kb-timeline-body {
  border-color: var(--c-accent-border);
  background: var(--c-accent-bg);
}

.kb-timeline-body strong { display: block; color: var(--c-text); margin-bottom: 4px; }
.kb-timeline-body p { margin: 0; }

/* 三大相信 */
.kb-belief-list { display: flex; flex-direction: column; gap: 10px; margin: 12px 0; }

.kb-belief {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 14px;
  font-size: 13.5px;
  color: var(--c-text-2);
  line-height: 1.7;
}

.kb-belief-num {
  width: 28px; height: 28px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 2px;
}

.kb-belief strong { color: var(--c-text); display: block; margin-bottom: 4px; }

/* 角色卡片 */
.kb-role-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 16px 0;
}

.kb-role-card {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 14px;
}

.kb-role-card--wide { grid-column: 1 / -1; }

.kb-role-icon {
  width: 28px; height: 28px;
  background: var(--c-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 800;
  margin-bottom: 10px;
}

.kb-role-title { font-size: 13.5px; font-weight: 700; color: var(--c-text); margin-bottom: 6px; }
.kb-role-desc { font-size: 12.5px; color: var(--c-text-3); line-height: 1.65; }

/* 验收节点 */
.kb-acceptance-list { display: flex; flex-direction: column; gap: 8px; margin: 16px 0; }

.kb-acceptance-item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.kb-acceptance-num {
  width: 28px; height: 28px;
  background: var(--c-accent);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
  flex-shrink: 0;
  margin-top: 2px;
}

.kb-acceptance-body {
  flex: 1;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 12px 14px;
}

.kb-acceptance-title {
  font-size: 13.5px;
  font-weight: 700;
  color: var(--c-text);
  margin-bottom: 5px;
}

.kb-acceptance-desc { font-size: 13px; color: var(--c-text-3); line-height: 1.65; }

/* 错题库条目 */
.kb-qa-item {
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 14px 0;
}

.kb-qa-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--c-surface-3);
  border-bottom: 1px solid var(--c-border);
}

.kb-qa-title { font-size: 13px; font-weight: 600; color: var(--c-text); }

.kb-qa-tag {
  font-size: 10.5px;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 20px;
}

.kb-qa-tag--red { background: var(--c-red-bg); color: var(--c-red); }
.kb-qa-tag--yellow { background: var(--c-amber-bg); color: var(--c-amber); }

.kb-qa-body { padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; }

.kb-qa-row { display: flex; gap: 10px; font-size: 13px; line-height: 1.65; }

.kb-qa-key {
  width: 72px;
  flex-shrink: 0;
  color: var(--c-text-3);
  font-weight: 600;
  font-size: 12px;
  padding-top: 1px;
}

.kb-qa-val { flex: 1; color: var(--c-text-2); }

/* 表格 */
.kb-table-wrap { overflow-x: auto; margin: 16px 0; }

.kb-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.kb-table th {
  background: var(--c-surface-2);
  padding: 9px 14px;
  text-align: left;
  font-weight: 600;
  color: var(--c-text);
  border: 1px solid var(--c-border);
  white-space: nowrap;
}

.kb-table td {
  padding: 9px 14px;
  border: 1px solid var(--c-border);
  color: var(--c-text-2);
  line-height: 1.5;
}

.kb-table tr:nth-child(even) td { background: var(--c-surface-2); }

/* 关联文档 */
.doc-related {
  padding: 16px 28px;
  border-top: 1px solid var(--c-border);
  background: var(--c-surface);
}

.doc-related-title {
  font-size: 12px;
  font-weight: 700;
  color: var(--c-text-4);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.doc-related-list { display: flex; gap: 8px; flex-wrap: wrap; }

.doc-related-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  font-size: 12.5px;
  color: var(--c-text-3);
  cursor: pointer;
  background: var(--c-surface);
  transition: all var(--transition);
}

.doc-related-item:hover {
  border-color: var(--c-accent-border);
  color: var(--c-accent);
  background: var(--c-accent-bg);
}

/* ── 8. AI 问答面板 ─────────────────────────────────────── */
#kb-ai-panel {
  grid-area: ai;
  background: var(--c-surface);
  border-left: 1px solid var(--c-border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* 面板头部 */
.ai-panel-header {
  padding: 14px 16px 12px;
  border-bottom: 1px solid var(--c-border);
  flex-shrink: 0;
}

.ai-panel-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-text);
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 8px;
}

.ai-title-icon {
  width: 20px; height: 20px;
  background: var(--c-primary);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: #fff;
}

/* 全库检索徽章 */
.ai-kb-badge {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 10px;
  background: var(--c-green-bg);
  border: 1px solid var(--c-green-border);
  border-radius: var(--radius-md);
  font-size: 12px;
  color: #1a6644;
}

.ai-kb-icon  { font-size: 13px; flex-shrink: 0; }
.ai-kb-text  { flex: 1; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.ai-kb-count {
  font-size: 10.5px;
  background: rgba(255,255,255,0.7);
  border: 1px solid var(--c-green-border);
  color: var(--c-green);
  padding: 1px 7px;
  border-radius: 20px;
  font-weight: 600;
  flex-shrink: 0;
}
.ai-context-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--c-green);
  flex-shrink: 0;
  animation: kbPulse 2.4s infinite;
}

@keyframes kbPulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.35; }
}

/* 正在浏览提示（仅展示，不限制检索范围） */
.ai-viewing-pill {
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: 20px;
  font-size: 11px;
  color: var(--c-text-3);
  margin-top: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 快捷功能按钮 */
.ai-quick-actions {
  padding: 12px 12px 10px;
  border-bottom: 1px solid var(--c-border-soft);
  flex-shrink: 0;
}

.ai-qa-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--c-text-4);
  letter-spacing: 0.5px;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.ai-qa-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ai-qa-btn {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border: 1px solid var(--c-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--c-text-2);
  background: var(--c-surface);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.ai-qa-btn:hover {
  border-color: var(--c-accent-border);
  color: var(--c-accent);
  background: var(--c-accent-bg);
}

.ai-qa-btn-icon { font-size: 12px; }

/* 对话区 */
.ai-messages {
  flex: 1;
  overflow-y: auto;
  padding: 14px 12px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.ai-messages::-webkit-scrollbar { width: 4px; }
.ai-messages::-webkit-scrollbar-thumb { background: var(--c-border); border-radius: 4px; }

.ai-msg {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.ai-msg.user { align-items: flex-end; }
.ai-msg.bot  { align-items: flex-start; }

.ai-msg-bubble {
  max-width: 92%;
  padding: 9px 13px;
  border-radius: 12px;
  font-size: 13px;
  line-height: 1.65;
}

.ai-msg.user .ai-msg-bubble {
  background: var(--c-primary);
  color: #fff;
  border-radius: 12px 12px 3px 12px;
}

.ai-msg.bot .ai-msg-bubble {
  background: var(--c-surface-2);
  color: var(--c-text-2);
  border: 1px solid var(--c-border);
  border-radius: 12px 12px 12px 3px;
}

.ai-msg-source {
  font-size: 11px;
  color: var(--c-text-4);
  display: flex;
  align-items: center;
  gap: 3px;
  cursor: pointer;
  padding: 0 2px;
}

.ai-msg-source:hover { color: var(--c-accent); }

/* AI 反馈按钮 */
.ai-msg-feedback {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
  position: relative;
}

.ai-rating-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.ai-rating-btn:hover:not(:disabled) {
  border-color: var(--c-accent);
  background: var(--c-accent-bg);
  transform: scale(1.15);
}

.ai-rating-btn.active {
  border-color: #F59E0B;
  background: #FFFBEB;
}

.ai-rating-btn:disabled {
  cursor: not-allowed;
}

.ai-rating-icon {
  font-size: 18px;
  line-height: 1;
  color: #D1D5DB;
  transition: color 0.2s ease;
}

.ai-rating-btn:hover:not(:disabled) .ai-rating-icon {
  color: #F59E0B;
}

.ai-rating-btn.active .ai-rating-icon {
  color: #F59E0B;
}

.ai-feedback-thanks {
  font-size: 12px;
  color: var(--c-green);
  margin-left: 8px;
  animation: fadeIn 0.3s ease;
}

/* ── 问题标签反馈（低分展开） ──────────────────────── */
.ai-feedback-tags {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed #e4e7ed;
  animation: fadeIn 0.3s ease;
  width: 100%;
}

.ai-feedback-tags-label {
  font-size: 12px;
  color: #909399;
}

.ai-feedback-tags-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.ai-feedback-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 6px 12px;
  font-size: 12px;
  color: #606266;
  background: #f5f7fa;
  border: 1px solid #dcdfe6;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.ai-feedback-tag:hover:not(:disabled) {
  border-color: var(--c-accent);
  background: var(--c-accent-bg);
  color: var(--c-accent);
}

.ai-feedback-tag.active {
  border-color: var(--c-accent);
  background: var(--c-accent-bg);
  color: var(--c-accent);
  font-weight: 500;
}

.ai-feedback-tag:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.ai-feedback-detail-wrap {
  display: flex;
  flex-direction: row;
  align-items: flex-end;
  gap: 8px;
  margin-top: 4px;
  animation: fadeIn 0.3s ease;
}

.ai-feedback-detail-input {
  flex: 1;
  min-width: 0;
  padding: 8px 12px;
  font-size: 13px;
  color: #303133;
  background: #f5f7fa;
  border: 1px solid #dcdfe6;
  border-radius: 8px;
  resize: none;
  outline: none;
  transition: border-color 0.2s;
  box-sizing: border-box;
}

.ai-feedback-detail-input:focus {
  border-color: var(--c-accent);
}

.ai-feedback-detail-submit {
  flex-shrink: 0;
  padding: 8px 16px;
  font-size: 12px;
  color: white;
  background: var(--c-accent);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: opacity 0.2s;
}

.ai-feedback-detail-submit:hover:not(:disabled) {
  opacity: 0.85;
}

.ai-feedback-detail-submit:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 旧的反馈按钮样式（保留用于其他页面） */
.ai-feedback-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--c-border);
  background: var(--c-surface);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
  padding: 0;
}

.ai-feedback-btn:hover:not(:disabled) {
  border-color: var(--c-accent);
  background: var(--c-accent-bg);
  transform: scale(1.1);
}

.ai-feedback-btn.active {
  border-color: var(--c-accent);
  background: var(--c-accent);
}

.ai-feedback-btn.active .ai-feedback-icon {
  filter: grayscale(0) brightness(2);
}

.ai-feedback-btn:disabled {
  cursor: not-allowed;
  opacity: 0.5;
}

.ai-feedback-icon {
  font-size: 16px;
  line-height: 1;
  filter: grayscale(1);
  transition: filter 0.2s ease;
}

.ai-feedback-btn:hover:not(:disabled) .ai-feedback-icon {
  filter: grayscale(0);
}

/* 打字指示器 */
.ai-typing {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 11px 14px;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: 12px 12px 12px 3px;
  width: fit-content;
}

.ai-dot {
  width: 5px; height: 5px;
  background: var(--c-text-4);
  border-radius: 50%;
  animation: kbBounce 1.2s infinite ease-in-out;
}

.ai-dot:nth-child(2) { animation-delay: .15s; }
.ai-dot:nth-child(3) { animation-delay: .30s; }

@keyframes kbBounce {
  0%, 60%, 100% { transform: translateY(0); }
  30% { transform: translateY(-4px); }
}

/* AI 输入区 */
.ai-input-area {
  padding: 10px 12px;
  border-top: 1px solid var(--c-border);
  flex-shrink: 0;
}

.ai-input-bar {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: 8px 10px;
  background: var(--c-surface-2);
  transition: border-color var(--transition);
}

.ai-input-bar:focus-within { border-color: var(--c-accent-border); background: var(--c-surface); }

.ai-input-bar textarea {
  flex: 1;
  border: none;
  background: transparent;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--c-text);
  resize: none;
  outline: none;
  line-height: 1.5;
  max-height: 90px;
  min-height: 20px;
}

.ai-input-bar textarea::placeholder { color: var(--c-text-4); }

.ai-send-btn {
  width: 30px; height: 30px;
  background: var(--c-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 14px;
  cursor: pointer;
  transition: background var(--transition);
}

.ai-send-btn:hover { background: var(--c-primary-hover); }

.ai-input-hint {
  font-size: 11px;
  color: var(--c-text-4);
  margin-top: 6px;
  text-align: center;
}

/* ── 9. 富文本格式（AI 回复 markdown） ─────────────────── */
.ai-msg-bubble strong { font-weight: 700; }
.ai-msg-bubble.bot-formatted { white-space: pre-wrap; }

/* ── 10. 工具类 ─────────────────────────────────────────── */
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* ── 文档列表样式 ──────────────────────────────────────── */
.doc-list-container {
  padding: 40px;
  max-width: 900px;
  margin: 0 auto;
}

.doc-list-container h2 {
  font-size: 28px;
  font-weight: 600;
  color: var(--c-text);
  margin: 0 0 8px;
}

.doc-list-desc {
  color: var(--c-text-3);
  font-size: 14px;
  margin: 0 0 32px;
}

.doc-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.doc-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
}

.doc-item:hover {
  border-color: var(--c-accent);
  background: var(--c-accent-bg);
  box-shadow: var(--shadow-sm);
}

.doc-item-icon {
  font-size: 32px;
  flex-shrink: 0;
}

.doc-item-content {
  flex: 1;
  min-width: 0;
}

.doc-item-title {
  font-size: 16px;
  font-weight: 500;
  color: var(--c-text);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.doc-item-meta {
  font-size: 13px;
  color: var(--c-text-3);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── 销转案例库状态徽章样式 ──────────────────────────────── */
.status-following {
  background: #e1f3d8;
  color: #67c23a;
}

.status-signed {
  background: #d9ecff;
  color: #409eff;
}

.status-lost {
  background: #fef0f0;
  color: #f56c6c;
}

.status-pending {
  background: #fdf6ec;
  color: #e6a23c;
}

.case-card-mini {
  background: white;
  border: 1px solid #e4e7ed;
  border-radius: 12px;
  padding: 20px;
  cursor: pointer;
  transition: all 0.3s;
}

.case-card-mini:hover {
  border-color: #409eff;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* ── 数据统计页面样式 ──────────────────────────────── */
.statistics-container {
  padding: 24px;
  background: #f5f7fa;
  min-height: calc(100vh - 60px);
}

.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  gap: 16px;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #e4e7ed;
  border-top-color: #409eff;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-state p {
  color: #909399;
  font-size: 14px;
}

.statistics-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.summary-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 8px;
}

.summary-card {
  background: white;
  border-radius: 8px;
  padding: 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
}

.summary-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.summary-card .card-icon {
  font-size: 36px;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  flex-shrink: 0;
}

.summary-card:nth-child(1) .card-icon {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.summary-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.summary-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.summary-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.summary-card .card-content {
  flex: 1;
}

.summary-card .card-label {
  font-size: 14px;
  color: #909399;
  margin-bottom: 8px;
}

.summary-card .card-value {
  font-size: 28px;
  font-weight: 600;
  color: #303133;
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.chart-card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  overflow: hidden;
}

.chart-card-full {
  grid-column: 1 / -1;
}

.chart-header {
  padding: 20px 24px;
  border-bottom: 1px solid #ebeef5;
}

.chart-title {
  font-size: 16px;
  font-weight: 600;
  color: #303133;
  margin: 0;
}

.chart-body {
  padding: 20px;
}

.chart {
  width: 100%;
  height: 350px;
}

.chart-card-full .chart {
  height: 400px;
}

@media (max-width: 1400px) {
  .summary-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 1024px) {
  .charts-grid {
    grid-template-columns: 1fr;
  }

  .summary-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .statistics-container {
    padding: 16px;
  }

  .summary-cards {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .summary-card {
    padding: 16px;
  }

  .summary-card .card-icon {
    width: 48px;
    height: 48px;
    font-size: 28px;
  }

  .summary-card .card-value {
    font-size: 24px;
  }

  .charts-grid {
    gap: 16px;
  }

  .chart {
    height: 300px;
  }

  .chart-card-full .chart {
    height: 350px;
  }
}
  box-shadow: 0 4px 16px rgba(64, 158, 255, 0.15);
  transform: translateY(-2px);
}