/* ---------- 采购知识智能助手 ---------- */

.knowledge-layout {
  display: grid;
  grid-template-columns: minmax(260px, 300px) minmax(0, 1fr) minmax(260px, 300px);
  gap: 16px;
  align-items: stretch;
  min-height: calc(100vh - 200px);
}

.knowledge-col {
  display: flex;
  flex-direction: column;
  min-height: 0;
  margin: 0;
}

.knowledge-col__head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
  flex-shrink: 0;
}

.knowledge-col__head h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

.knowledge-col__body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 12px 14px;
}

/* 制度列表 */
.kb-doc {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--canvas);
  margin-bottom: 8px;
  overflow: hidden;
}

.kb-doc.is-open {
  border-color: rgba(20, 97, 198, 0.35);
}

.kb-doc__btn {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  padding: 10px 12px;
  border: 0;
  background: transparent;
  cursor: pointer;
  text-align: left;
  font-family: var(--sans);
  color: var(--ink);
}

.kb-doc__btn:hover {
  background: var(--surface);
}

.kb-doc__title {
  font-size: 13px;
  font-weight: 600;
  line-height: 1.4;
}

.kb-doc__meta {
  font-size: 11.5px;
  color: var(--ink-faint);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}

.kb-doc__chunks {
  border-top: 1px solid var(--border);
  padding: 6px 8px 8px;
  background: var(--surface);
  display: none;
}

.kb-doc.is-open .kb-doc__chunks {
  display: block;
}

.kb-chunk {
  width: 100%;
  display: block;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 7px 8px;
  border-radius: var(--radius-tag);
  cursor: pointer;
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-soft);
  line-height: 1.45;
}

.kb-chunk:hover,
.kb-chunk.is-active {
  background: var(--accent-soft);
  color: var(--brand-700);
}

.kb-chunk__art {
  font-weight: 600;
  color: var(--ink);
  margin-right: 4px;
}

.kb-chunk.is-active .kb-chunk__art {
  color: var(--brand-700);
}

/* 对话区 */
.knowledge-chat {
  display: flex;
  flex-direction: column;
  min-height: 520px;
  max-height: calc(100vh - 200px);
}

.knowledge-chat__messages {
  flex: 1;
  min-height: 200px;
  overflow: auto;
  padding: 16px 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  background: var(--canvas);
}

.knowledge-empty {
  margin: auto;
  max-width: 420px;
  text-align: center;
  color: var(--ink-faint);
  padding: 24px 12px;
}

.knowledge-empty__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-soft);
  margin: 0 0 8px;
}

.knowledge-empty__desc {
  font-size: 13px;
  line-height: 1.6;
  margin: 0 0 16px;
}

.knowledge-suggest {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
}

.knowledge-msg {
  max-width: min(100%, 640px);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.knowledge-msg--user {
  align-self: flex-end;
}

.knowledge-msg--assistant {
  align-self: flex-start;
  width: 100%;
  max-width: 100%;
}

.knowledge-msg__role {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-faint);
  padding: 0 4px;
}

.knowledge-msg--user .knowledge-msg__role {
  text-align: right;
}

.knowledge-msg__bubble {
  border-radius: var(--radius);
  padding: 10px 14px;
  font-size: 14px;
  line-height: 1.65;
  border: 1px solid var(--border);
}

.knowledge-msg--user .knowledge-msg__bubble {
  background: var(--navy-900);
  border-color: var(--navy-900);
  color: #fff;
}

.knowledge-msg--assistant .knowledge-msg__bubble {
  background: var(--surface);
  color: var(--ink-soft);
}

.knowledge-msg__bubble .ai-panel__text p {
  margin: 0 0 0.7em;
}

.knowledge-msg__bubble .ai-panel__text p:last-child {
  margin-bottom: 0;
}

.knowledge-msg__meta {
  font-size: 11.5px;
  color: var(--ink-faint);
  padding: 0 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
}

.knowledge-msg__meta .tag {
  font-size: 11px;
}

.knowledge-composer {
  border-top: 1px solid var(--border);
  padding: 12px 14px 14px;
  background: var(--surface-2);
  flex-shrink: 0;
}

.knowledge-composer__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
}

.knowledge-composer__row {
  display: flex;
  gap: 10px;
  align-items: flex-end;
}

.knowledge-composer__input {
  flex: 1;
  min-width: 0;
  font-family: var(--sans);
  font-size: 14px;
  color: var(--ink);
  background: var(--canvas);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  min-height: 44px;
  max-height: 120px;
  resize: vertical;
  line-height: 1.5;
}

.knowledge-composer__input:focus {
  outline: none;
  border-color: var(--brand-600);
  box-shadow: 0 0 0 3px rgba(20, 97, 198, 0.14);
}

.knowledge-composer__actions {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}

.knowledge-composer__hint {
  margin: 8px 0 0;
  font-size: 11.5px;
  color: var(--ink-faint);
  line-height: 1.45;
}

/* 出处面板 */
.knowledge-sources__list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.knowledge-source {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--canvas);
  padding: 10px 12px;
}

.knowledge-source.is-highlight {
  border-color: rgba(20, 97, 198, 0.4);
  box-shadow: 0 0 0 2px rgba(20, 97, 198, 0.08);
}

.knowledge-source__cite {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.4;
  margin-bottom: 4px;
}

.knowledge-source__score {
  font-size: 11px;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

.knowledge-source__text {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.55;
  max-height: 7.5em;
  overflow: auto;
}

.knowledge-source-empty {
  font-size: 13px;
  color: var(--ink-faint);
  line-height: 1.55;
  padding: 8px 2px;
}

.knowledge-preview {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--border);
}

.knowledge-preview__label {
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-faint);
  margin-bottom: 6px;
}

.knowledge-preview__body {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.6;
  white-space: pre-wrap;
}

/* 工具条 */
.knowledge-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 14px;
}

.knowledge-toolbar .ai-panel__key-toggle {
  margin: 0;
}

.knowledge-mode {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12.5px;
  color: var(--ink-soft);
}

.knowledge-mode input {
  accent-color: var(--brand-600);
}

@media (max-width: 1100px) {
  .knowledge-layout {
    grid-template-columns: 1fr;
  }

  .knowledge-chat {
    max-height: none;
    min-height: 480px;
  }

  .knowledge-col--sources {
    order: 3;
  }

  .knowledge-col--lib {
    order: 2;
    max-height: 320px;
  }

  .knowledge-col--chat {
    order: 1;
  }

  .kb-hint-desktop {
    display: none;
  }

  .knowledge-composer__chips .ai-chip {
    min-height: 36px;
    padding: 6px 12px;
  }
}