/* ── 知识库整体布局 ── */
.kb-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  flex-direction: column;
}

.kb-topbar {
  display: flex;
  align-items: center;
  padding: 10px 14px;
  flex-shrink: 0;
}

.kb-inner {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── 左侧导航 ── */
.kb-sidebar {
  width: 260px;
  min-width: 260px;
  background: #f9f9f9;
  border-right: 1px solid #e8e8e8;
  display: flex;
  flex-direction: column;
  padding: 16px 8px;
  gap: 12px;
}

.kb-sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
}

.kb-title {
  font-size: 16px;
  font-weight: 600;
}

.kb-new-btn {
  background: #0d0d0d;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-new-btn:hover { background: #333; }

.kb-search {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 8px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: #fff;
  margin: 0 4px;
  transition: border-color 0.15s;
}
.kb-search:focus { border-color: #aaa; }

.kb-nav { display: flex; flex-direction: column; gap: 2px; }

.kb-group-label {
  font-size: 12px;
  color: #6b6b6b;
  padding: 8px 12px 4px;
}

.kb-nav-item {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 14px;
  transition: background 0.15s;
}
.kb-nav-item:hover { background: #f0f0f0; }
.kb-nav-item.active { background: #ececec; }

.kb-nav-icon { color: #6b6b6b; font-size: 14px; }
.kb-nav-label { flex: 1; }

.kb-nav-count {
  font-size: 12px;
  color: #6b6b6b;
  background: #e8e8e8;
  border-radius: 10px;
  padding: 1px 7px;
  min-width: 20px;
  text-align: center;
}
.kb-nav-count:empty { display: none; }

/* ── 右侧主区 ── */
.kb-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  height: 100vh;
}

/* 列表和详情外层容器 */
#viewList {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
}

#viewDetail {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

#viewForm {
  flex: 1;
  overflow-y: auto;
  padding: 32px 40px;
}

.kb-main-header { margin-bottom: 20px; }
.kb-main-title { font-size: 20px; font-weight: 600; }

/* ── 列表 ── */
.kb-list { display: flex; flex-direction: column; gap: 10px; }

.kb-card {
  border: 1px solid #e8e8e8;
  border-radius: 12px;
  padding: 16px 20px;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s;
  background: #fff;
}
.kb-card:hover { background: #fafafa; border-color: #d0d0d0; }

.kb-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 6px;
}

.kb-card-title { font-size: 15px; font-weight: 500; flex: 1; }

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

.kb-tag {
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 6px;
  background: #f0f0f0;
  color: #444;
  white-space: nowrap;
}
.kb-tag.category { background: #e8f0fe; color: #1a56db; }

.kb-card-meta {
  font-size: 13px;
  color: #6b6b6b;
  display: flex;
  align-items: center;
  gap: 8px;
}
.kb-card-date-short { display: none; }

.kb-card-preview {
  font-size: 13px;
  color: #6b6b6b;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 500px;
}

/* ── 详情 ── */
.kb-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 32px 40px 0;
  flex-shrink: 0;
}

.kb-back-btn {
  border: none;
  background: none;
  cursor: pointer;
  font-size: 14px;
  color: #6b6b6b;
  padding: 4px 8px;
  border-radius: 6px;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-back-btn:hover { background: #f0f0f0; color: #0d0d0d; }

.kb-detail-title { font-size: 20px; font-weight: 600; flex: 1; }

.kb-detail-actions { display: flex; gap: 8px; }

.kb-edit-btn {
  border: 1px solid #0d0d0d;
  background: #fff;
  color: #0d0d0d;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-edit-btn:hover { background: #f5f5f5; }

.kb-delete-btn {
  border: 1px solid #dc2626;
  background: #fff;
  color: #dc2626;
  border-radius: 8px;
  padding: 6px 14px;
  font-size: 13px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-delete-btn:hover { background: #fef2f2; }

.kb-detail-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 40px 16px;
  font-size: 13px;
  color: #b0b0b0;
  flex-shrink: 0;
  border-bottom: 1px solid #f0f0f0;
}

.kb-detail-body {
  display: flex;
  gap: 32px;
  align-items: flex-start;
  flex: 1;
  overflow-y: auto;
  padding: 24px 40px 40px;
}

/* ── 目录 ── */
.kb-toc {
  min-width: 140px;
  max-width: 160px;
  position: sticky;
  top: 0;
  font-size: 13px;
  color: #6b6b6b;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.kb-toc:empty { display: none; }
.kb-toc-label { font-weight: 500; color: #0d0d0d; margin-bottom: 4px; font-size: 12px; }
.kb-toc a { color: #6b6b6b; text-decoration: none; transition: color 0.15s; display: block; padding: 2px 0 2px 10px; border-left: 2px solid transparent; }
.kb-toc a:hover { color: #0d0d0d; }
.kb-toc a.active { color: #0d0d0d; font-weight: 500; border-left-color: #0d0d0d; }
.kb-toc a.toc-h3 { padding-left: 20px; font-size: 12px; color: #9b9b9b; }

/* ── Markdown 内容渲染 ── */
.kb-content { flex: 1; font-size: 16px; line-height: 1.8; }
.kb-content h1 { font-size: 20px; font-weight: 600; margin: 0 0 16px; }
.kb-content h2 { font-size: 17px; font-weight: 600; margin: 24px 0 10px; }
.kb-content h3 { font-size: 15px; font-weight: 600; margin: 16px 0 8px; }
.kb-content p { margin: 0 0 12px; }
.kb-content ul, .kb-content ol { padding-left: 20px; margin: 0 0 12px; }
.kb-content li { margin-bottom: 4px; }
.kb-content code { background: #f4f4f4; border-radius: 4px; padding: 2px 6px; font-size: 13px; }
.kb-content pre { background: #f4f4f4; border-radius: 8px; padding: 16px; overflow-x: auto; margin: 0 0 12px; }
.kb-content pre code { background: none; padding: 0; }
.kb-content strong { font-weight: 600; }
.kb-content hr { border: none; border-top: 1px solid #e8e8e8; margin: 20px 0; }
.kb-content table { border-collapse: collapse; width: 100%; margin-bottom: 12px; }
.kb-content th, .kb-content td { border: 1px solid #e8e8e8; padding: 8px 12px; font-size: 14px; }
.kb-content th { background: #f9f9f9; font-weight: 500; }

/* ── 表单 ── */
.kb-form { display: flex; flex-direction: column; gap: 14px; max-width: 800px; }

.kb-form-input {
  font-size: 20px;
  font-weight: 500;
  border: none;
  border-bottom: 1px solid #e0e0e0;
  padding: 8px 0;
  outline: none;
  font-family: inherit;
  background: transparent;
  color: #0d0d0d;
}
.kb-form-input:focus { border-bottom-color: #aaa; }

.kb-form-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.kb-form-row label { font-size: 13px; color: #6b6b6b; }

.kb-form-select {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  background: #fff;
  cursor: pointer;
}

.kb-form-tags {
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  flex: 1;
}
.kb-form-tags:focus { border-color: #aaa; }

.kb-form-hint { font-size: 13px; color: #6b6b6b; margin: 0; }

.kb-form-textarea {
  border: 1px solid #e0e0e0;
  border-radius: 12px;
  padding: 14px 16px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  resize: vertical;
  min-height: 360px;
  line-height: 1.7;
  color: #0d0d0d;
}
.kb-form-textarea:focus { border-color: #aaa; }

.kb-form-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.kb-cancel-btn {
  border: 1px solid #e0e0e0;
  background: #fff;
  color: #0d0d0d;
  border-radius: 8px;
  padding: 8px 20px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-cancel-btn:hover { background: #f5f5f5; }

.kb-save-btn {
  background: #0d0d0d;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 8px 20px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.kb-save-btn:hover { background: #333; }

.kb-empty {
  text-align: center;
  color: #6b6b6b;
  font-size: 14px;
  padding: 60px 0;
}

/* ── 分类管理 ── */
.kb-nav-item {
  position: relative;
}
.kb-nav-item .kb-nav-actions {
  display: none;
  gap: 2px;
  margin-left: auto;
}
.kb-nav-item:hover .kb-nav-actions {
  display: flex;
}
.kb-nav-actions button {
  border: none;
  background: none;
  cursor: pointer;
  color: #999;
  font-size: 13px;
  padding: 2px 4px;
  border-radius: 4px;
  line-height: 1;
  font-family: inherit;
  transition: background 0.12s, color 0.12s;
}
.kb-nav-actions button:hover {
  background: #e0e0e0;
  color: #0d0d0d;
}

.kb-public-badge {
  font-size: 11px;
  margin-right: 3px;
  opacity: 0.7;
}

.kb-nav-sub {
  padding-left: 32px;
}

.kb-nav-arrow {
  font-size: 12px;
  color: #999;
  cursor: pointer;
  width: 14px;
  display: inline-block;
  text-align: center;
  transition: transform 0.15s;
  flex-shrink: 0;
}
.kb-nav-arrow.collapsed {
  transform: rotate(-90deg);
}
.kb-nav-arrow.invisible {
  visibility: hidden;
  pointer-events: none;
}

.kb-nav-add {
  margin-top: 4px;
  padding: 7px 12px;
  font-size: 13px;
  color: #999;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.15s, color 0.15s;
}
.kb-nav-add:hover {
  background: #f0f0f0;
  color: #0d0d0d;
}

/* ── 自定义弹窗 ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.modal-box {
  background: #fff;
  border-radius: 14px;
  padding: 28px 28px 20px;
  width: 340px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.modal-title {
  font-size: 15px;
  font-weight: 600;
  color: #0d0d0d;
}
.modal-body input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 14px;
  font-family: inherit;
  outline: none;
  color: #0d0d0d;
  transition: border-color 0.15s;
}
.modal-body input:focus { border-color: #C96442; }
.modal-body .modal-msg {
  font-size: 14px;
  color: #444;
  line-height: 1.6;
}
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.modal-cancel {
  border: 1px solid #e0e0e0;
  background: #fff;
  color: #0d0d0d;
  border-radius: 8px;
  padding: 7px 18px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.15s;
}
.modal-cancel:hover { background: #f5f5f5; }
.modal-confirm {
  background: #0d0d0d;
  color: #fff;
  border: none;
  border-radius: 8px;
  padding: 7px 18px;
  font-size: 14px;
  cursor: pointer;
  font-family: inherit;
  transition: opacity 0.15s;
}
.modal-confirm:hover { opacity: 0.82; }
.modal-confirm.danger {
  background: #dc2626;
}

/* ── 移动端适配 ── */
@media (max-width: 768px) {
  .kb-sidebar {
    position: fixed;
    top: 0; left: 0;
    height: 100vh;
    z-index: 200;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    width: 280px !important;
    min-width: 280px !important;
  }

  .kb-sidebar.mobile-open {
    transform: translateX(0);
  }

  .kb-main { width: 100%; }

  .kb-detail {
    position: fixed;
    inset: 0;
    z-index: 150;
    width: 100% !important;
  }

  .kb-card-grid {
    grid-template-columns: 1fr !important;
  }
}

/* ── 手机端分类列表层 ── */
.kb-mobile-cats { display: none; }

@media (max-width: 768px) {

  /* 隐藏电脑端左侧导航 */
  .kb-sidebar { display: none !important; }

  /* 手机端分类列表 */
  .kb-mobile-cats {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    top: 48px;
    bottom: 56px;
    background: #fff;
    z-index: 100;
    overflow-y: auto;
  }

  .kb-mobile-cats.hidden { display: none; }

  .kb-mobile-cats-header {
    display: none;
  }

  .kb-mobile-cats-title {
    font-size: 22px;
    font-weight: 700;
    color: #0d0d0d;
  }

  .kb-mobile-cats-add {
    border: none;
    background: none;
    color: #c96442;
    font-size: 15px;
    font-family: inherit;
    cursor: pointer;
    padding: 4px 0;
  }

  .kb-mobile-cats-body {
    padding: 12px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .kb-mobile-cat-group {
    background: #fff;
    border: 1px solid #e8e8e8;
    border-radius: 14px;
    overflow: hidden;
  }

  .kb-mobile-cat-item {
    display: flex;
    align-items: center;
    padding: 13px 16px;
    cursor: pointer;
    border-bottom: 1px solid #f0f0f0;
    transition: background 0.12s;
  }

  .kb-mobile-cat-item:last-child { border-bottom: none; }
  .kb-mobile-cat-item:hover { background: #f9f9f9; }

  .kb-mobile-cat-label { flex: 1; font-size: 15px; color: #0d0d0d; }
  .kb-mobile-cat-count { font-size: 13px; color: #aaa; margin-right: 8px; }
  .kb-mobile-cat-arrow { color: #ccc; font-size: 16px; }

  .kb-mobile-cat-actions {
    display: flex;
    gap: 12px;
    margin-right: 8px;
  }

  .kb-mobile-cat-actions button {
    border: none;
    background: none;
    color: #aaa;
    font-size: 14px;
    cursor: pointer;
    padding: 2px;
  }

  .kb-mobile-cat-sub {
    padding-left: 32px;
    background: #fafafa;
  }

  /* 手机端主内容区顶部加返回按钮 */
  .kb-mobile-back {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid #f0f0f0;
    gap: 8px;
    flex-shrink: 0;
  }

  .kb-mobile-back-btn {
    border: none;
    background: none;
    color: #c96442;
    font-size: 15px;
    font-family: inherit;
    cursor: pointer;
    padding: 4px 8px 4px 0;
  }

  .kb-mobile-back-title {
    font-size: 16px;
    font-weight: 600;
    color: #0d0d0d;
  }

  /* 新增按钮在手机端放右上角 */
  .kb-main-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-right: 16px;
  }
}

/* ── 手机端悬浮目录按钮 & 抽屉 ── */
.kb-toc-fab {
  display: none;
  position: fixed;
  right: 20px;
  bottom: 80px;
  background: #0d0d0d;
  color: #fff;
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 14px;
  font-family: inherit;
  cursor: pointer;
  z-index: 200;
  box-shadow: 0 2px 12px rgba(0,0,0,0.18);
}
.kb-toc-drawer {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 300;
}
.kb-toc-drawer.open { display: block; }
.kb-toc-drawer-mask {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.3);
}
.kb-toc-drawer-panel {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: #fff;
  border-radius: 16px 16px 0 0;
  padding: 20px 24px 40px;
  max-height: 60vh;
  overflow-y: auto;
  transform: translateY(100%);
  transition: transform 0.25s ease;
}
.kb-toc-drawer.open .kb-toc-drawer-panel { transform: translateY(0); }
.kb-toc-drawer-title { font-size: 14px; font-weight: 600; color: #0d0d0d; margin-bottom: 14px; }
.kb-toc-drawer-list a {
  display: block;
  padding: 10px 0;
  font-size: 15px;
  color: #333;
  text-decoration: none;
  border-bottom: 1px solid #f0f0f0;
}
.kb-toc-drawer-list a.toc-h3 { padding-left: 16px; font-size: 14px; color: #6b6b6b; }
.kb-toc-drawer-list a:last-child { border-bottom: none; }

@media (max-width: 768px) {
  .kb-toc { display: none !important; }
  .kb-toc-fab { display: block; }
  .kb-back-btn { display: none; }
  .kb-main-title { display: none; }
  .kb-main-header { display: none; }
  #viewList { padding: 12px 16px; }
  #viewForm { padding: 16px 16px; }

  /* 卡片手机端：标题占满宽度，标签换行显示 */
  .kb-card-top {
    flex-direction: column;
    gap: 8px;
  }
  .kb-card-title {
    font-size: 15px;
    line-height: 1.5;
    white-space: normal;
  }
  .kb-card-tags { flex-wrap: wrap; }

  /* 日期简化显示：手机只显示月-日 */
  .kb-card-date-full { display: none; }
  .kb-card-date-short { display: inline; white-space: nowrap; }
  .kb-card-meta { font-size: 12px; }
  .kb-card-preview { max-width: 100%; font-size: 13px; }
}

/* 分页 */
.kb-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 24px 0 16px;
  flex-wrap: wrap;
}
.kb-pager-btn {
  padding: 6px 12px;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  background: #fff;
  font-size: 13px;
  color: #333;
  cursor: pointer;
  transition: all 0.15s;
}
.kb-pager-btn:hover:not(:disabled) { background: #f0f0f0; }
.kb-pager-btn.active { background: #0d0d0d; color: #fff; border-color: #0d0d0d; }
.kb-pager-btn:disabled { opacity: 0.35; cursor: default; }
.kb-pager-ellipsis { font-size: 13px; color: #aaa; padding: 0 4px; }