/* ===== 打印/存为 PDF 专用样式（AI小店全站共享） =====
   用法：结果区按钮调 window.print()，仅 #printArea 内容参与打印，A4 排版 */
@media print {
  @page { margin: 20mm 18mm; }
  body { background: #fff !important; }
  body * { visibility: hidden !important; }
  #printArea, #printArea * { visibility: visible !important; }
  #printArea {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    color: #000;
    font-size: 13px;
    line-height: 1.8;
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }
  #printArea .print-doc-title {
    text-align: center;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: 1px;
  }
  #printArea h1 { font-size: 19px; margin: 16px 0 8px; }
  #printArea h2 { font-size: 17px; margin: 14px 0 7px; }
  #printArea h3 { font-size: 15px; margin: 12px 0 6px; }
  #printArea h4 { font-size: 14px; margin: 10px 0 5px; }
  #printArea p { margin: 6px 0; }
  #printArea ul, #printArea ol { margin: 6px 0; padding-left: 22px; }
  #printArea li { margin: 3px 0; }
  #printArea hr { border: none; border-top: 1px solid #999; margin: 14px 0; }
  #printArea strong { font-weight: 700; }
  #printArea em { font-style: italic; }
  #printArea blockquote {
    margin: 8px 0; padding: 4px 12px;
    border-left: 3px solid #ccc; color: #333;
  }
  #printArea code { font-size: 12px; }
  #printArea pre {
    white-space: pre-wrap; word-break: break-all;
    font-size: 12px; background: #f5f5f5; padding: 10px; border-radius: 6px;
  }
  #printArea table { border-collapse: collapse; width: 100%; margin: 8px 0; }
  #printArea table td, #printArea table th { border: 1px solid #999; padding: 5px 8px; font-size: 12px; }
  /* 签字栏留白 */
  #printArea .print-sign-space { margin-top: 48px; }
  /* 表格类 AI 输出（如凭证编号行）间距 */
  #printArea p + table { margin-top: 4px; }
}