.message-input-container {
  background: white;
  border-top: 1px solid #f0f0f0;
  padding: 16px 24px;
}

.selected-knowledge-bases {
  margin-bottom: 12px;
  padding: 8px 12px;
  background: #f5f5f5;
  border-radius: 6px;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.message-input-wrapper {
  position: relative;
}

.message-textarea {
  resize: none;
  padding: 12px;
  font-size: 14px;
  line-height: 1.6;
  border-radius: 8px;
  border: 1px solid #d9d9d9;
  transition: all 0.3s;
}

.message-textarea:hover {
  border-color: #40a9ff;
}

.message-textarea:focus {
  border-color: #1890ff;
  box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.1);
}

.message-input-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.message-input-hint {
  margin-top: 8px;
  font-size: 12px;
  color: #8c8c8c;
  display: flex;
  gap: 12px;
}

.kb-hint {
  color: #1890ff;
  font-weight: 500;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .message-input-container {
    padding: 12px 16px;
  }

  .message-input-toolbar {
    flex-wrap: wrap;
    gap: 8px;
  }
}