:root{
    --bg:#f4f5f7;
    --paper:#fff;
    --text:#202124;
    --muted:#6b7280;
    --line:#d8dde4;
    --soft:#f7f8fa;
    --strong:#111827;
    --accent:#3559e0;
    --shadow:0 14px 34px rgba(0,0,0,.08);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"Microsoft YaHei",Arial,sans-serif;
    line-height:1.75;
  }
  .app{
    max-width:1400px;
    margin:0 auto;
    padding:18px 20px 50px;
  }
  .toolbar{
    position:sticky;
    top:0;
    z-index:50;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:12px 14px;
    margin-bottom:20px;
    background:rgba(255,255,255,.96);
    border:1px solid var(--line);
    box-shadow:0 8px 24px rgba(0,0,0,.05);
    backdrop-filter:blur(10px);
  }
  .toolbar-title{
    display:flex;
    align-items:center;
    gap:12px;
    min-width:0;
  }
  .toolbar-title h1{
    margin:0;
    font-size:17px;
    font-weight:700;
    white-space:nowrap;
  }
  .save-state{
    color:var(--muted);
    font-size:12px;
    white-space:nowrap;
  }
  .toolbar-actions{
    display:flex;
    flex-wrap:wrap;
    justify-content:flex-end;
    gap:8px;
  }
  button,.file-btn{
    appearance:none;
    border:1px solid var(--line);
    background:#fff;
    color:#222;
    padding:8px 12px;
    font:inherit;
    font-size:13px;
    line-height:1.2;
    cursor:pointer;
    transition:.15s ease;
  }
  button:hover,.file-btn:hover{border-color:#aeb6c2;background:#fafafa}
  button.primary{background:var(--strong);color:#fff;border-color:var(--strong)}
  button.primary:hover{opacity:.9}
  button.danger{color:#b42318}
  .file-btn input{display:none}

  .paper{
    width:100%;
    max-width:980px;
    margin:0 auto;
    background:var(--paper);
    box-shadow:none;
    border:1px solid #e5e7eb;
    padding:46px 58px 56px;
  }

  .doc-title{
    margin:0;
    text-align:center;
    font-family:"Microsoft YaHei",Arial,sans-serif;
    font-size:29px;
    letter-spacing:.16em;
    font-weight:700;
  }
  .doc-subtitle{
    margin:5px 0 26px;
    text-align:center;
    color:var(--muted);
    font-size:13px;
  }
  .contract-meta{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px 24px;
    margin:0 0 22px;
    padding-bottom:16px;
    border-bottom:1px solid var(--line);
  }
  .meta-item,.inline-field{
    display:flex;
    align-items:center;
    gap:8px;
    min-width:0;
  }
  .contract-meta .full-row{
    grid-column:1 / -1;
  }
  .label{
    flex:none;
    color:#374151;
    font-weight:600;
  }

  input[type="text"],input[type="tel"],input[type="email"],input[type="number"],input[type="date"],
  select,textarea{
    width:100%;
    min-width:0;
    color:var(--text);
    background:#fafbfc;
    border:1px solid #d9dee5;
    border-radius:3px;
    padding:6px 8px;
    font:inherit;
    font-size:14px;
    outline:none;
  }
  input:focus,select:focus,textarea:focus{
    border-color:#96a5d6;
    background:#fff;
    box-shadow:0 0 0 2px rgba(53,89,224,.08);
  }
  textarea{
    resize:vertical;
    min-height:42px;
  }
  textarea[data-key="special.notes"] {
    overflow-y: hidden;
    resize: none;
  }
  .special-notes-print{
    display:none;
    white-space:pre-wrap;
    word-break:break-word;
  }
  .field-print-mirror{
    display:none;
    white-space:pre-wrap;
    overflow-wrap:anywhere;
    word-break:break-word;
  }
  .input-line{
    background:transparent!important;
    border:0!important;
    border-bottom:1px solid #9aa2ad!important;
    border-radius:0!important;
    padding:2px 4px!important;
    box-shadow:none!important;
  }
  .party-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:18px;
    margin:18px 0 24px;
  }
  .party-card{
    border:1px solid var(--line);
    padding:14px 16px 12px;
  }
  .party-card h3{
    margin:0 0 10px;
    font-size:15px;
  }
  .form-row{
    display:grid;
    grid-template-columns:150px 1fr;
    gap:10px;
    align-items:center;
    margin:6px 0;
  }

  .intro{
    text-indent:2em;
    margin:0 0 18px;
  }
  .clause{
    margin:24px 0 0;
  }
  .clause h2{
    margin:0 0 9px;
    padding-bottom:6px;
    border-bottom:1px solid #e6e8eb;
    font-family:"Microsoft YaHei",Arial,sans-serif;
    font-size:20px;
    font-weight:700;
  }
  .clause ol{
    margin:0;
    padding-left:1.5em;
  }
  .clause li{
    margin:7px 0;
    padding-left:.25em;
  }
  .editable-number{
    display:inline-block;
    width:72px!important;
    margin:0 3px;
    text-align:center;
    vertical-align:baseline;
  }

  .amount-box{
    border:1px solid var(--line);
    background:var(--soft);
    padding:12px 14px;
    margin:10px 0;
  }
  .amount-grid{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:10px 18px;
  }
  .amount-note{
    grid-template-columns:94px 1fr;
    align-items:start;
  }
  .amount-note label{
    padding-top:7px;
    font-weight: bold;
  }
  #depositRate{
    width:64px!important;
    flex:0 0 64px;
    text-align:center;
  }
  .amount-note{
    column-gap:8px;
  }
  .amount-note textarea{
    color:var(--text);
    line-height:1.55;
    text-align:left;
  }
  .field-help{
    display:block;
    margin-top:5px;
    color:var(--muted);
    font-size:12px;
  }

  .signature{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:38px;
    margin-top:30px;
    padding-top:18px;
    border-top:1px solid var(--line);
  }
  .sign-box{
    min-height:180px;
  }
  .sign-box h3{
    margin:0 0 14px;
    font-size:15px;
  }
  .sign-line{
    display:grid;
    grid-template-columns:125px 1fr;
    gap:8px;
    align-items:center;
    margin:9px 0;
  }

  .attachment{
    margin-top:52px;
    padding-top:34px;
    border-top:2px solid #222;
  }
  .attachment-title{
    text-align:center;
    font-family:"Microsoft YaHei",Arial,sans-serif;
    font-size:24px;
    margin:0 0 24px;
  }
  .section-title{
    margin:24px 0 10px;
    font-size:17px;
    font-weight:700;
  }
  table{
    width:100%;
    border-collapse:collapse;
    table-layout:fixed;
    font-size:14px;
  }
  th,td{
    border:1px solid #aeb4bc;
    padding:8px 9px;
    vertical-align:middle;
    word-break:break-word;
  }
  th{
    background:#f5f6f8;
    font-weight:700;
    text-align:center;
  }
  td input,td select,td textarea{
    border:1px;
    background:transparent;
    padding:2px 3px;
  }
  .project-info th{width:22%}
  .project-info td{width:78%}
  .page-table th:nth-child(1){width:8%}
  .page-table th:nth-child(2){width:24%}
  .page-table th:nth-child(3){width:46%}
  .page-table th:nth-child(4){width:22%}

  .checks{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:6px 10px;
    margin:8px 0 12px;
    padding:10px 12px;
    border:1px solid var(--line);
    background:#fafbfc;
  }
  .check{
    display:flex;
    align-items:center;
    gap:7px;
    min-height:28px;
    padding:2px 4px;
  }
  .check input{width:auto}
  .note{
    color:var(--muted);
    font-size:12px;
  }
  .attachment-sign{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:20px;
    margin-top:10px;
  }

  .attachment textarea{
    min-height:42px;
  }
  .attachment .note{
    margin-top:6px!important;
    margin-bottom:4px!important;
  }

  .preview-mode .toolbar .edit-only{display:none!important}
  .preview-mode input,
  .preview-mode textarea,
  .preview-mode select{
    pointer-events:none;
    background:transparent!important;
    border-color:transparent!important;
    box-shadow:none!important;
  }
  .preview-mode .input-line{
    border-bottom-color:#888!important;
  }
  .preview-mode .checks input{pointer-events:none}
  .preview-mode .paper{box-shadow:none}

  .screen-tip{
    max-width:980px;
    margin:0 auto 12px;
    color:var(--muted);
    font-size:12px;
    text-align:right;
  }

  @media (max-width:900px){
    .app{padding:10px 10px 36px}
    .toolbar{position:static;align-items:flex-start;flex-direction:column}
    .toolbar-actions{justify-content:flex-start}
    .paper{padding:30px 24px}
    .party-grid,.signature,.attachment-sign,.amount-grid,.contract-meta{grid-template-columns:1fr}
    .checks{grid-template-columns:1fr 1fr}
  }
  @media (max-width:600px){
    .paper{padding:24px 16px}
    .doc-title{font-size:24px}
    .checks{grid-template-columns:1fr}
    .form-row{grid-template-columns:1fr;gap:4px}
    table{font-size:13px}
    th,td{padding:6px}
    .page-table{table-layout:auto}
  }

  @page{
    size:A4;
    margin:15mm 16mm 16mm;
  }
  @media print{
    html,body{background:#fff}
    *,*::before,*::after{
      box-shadow:none!important;
      -webkit-box-shadow:none!important;
      text-shadow:none!important;
      filter:none!important;
      background-image:none!important;
    }
    body{font-size:9.6pt;line-height:1.48}
    .app{max-width:none;padding:0;margin:0}
    .toolbar,.screen-tip,.no-print{display:none!important}
    .paper{
      max-width:none;
      width:auto;
      margin:0;
      padding:0;
      border:0;
      box-shadow:none;
    }
    .doc-title{font-size:18pt}
    .doc-subtitle{font-size:9pt;margin-bottom:16px}
    .clause{margin-top:10px}
    .clause h2{font-size:20px;margin-bottom:3px;padding-bottom:3px}
    .clause li{margin:2px 0}
    input,textarea,select{
      border:0!important;
      box-shadow:none!important;
      background:transparent!important;
      padding:0!important;
      color:#000!important;
      -webkit-appearance:none;
      appearance:none;
    }
    input::-webkit-calendar-picker-indicator,
    input::-webkit-inner-spin-button,
    input::-webkit-outer-spin-button{
      display:none!important;
      -webkit-appearance:none!important;
    }
    .input-line{border-bottom:1px solid #777!important}
    textarea{resize:none;overflow:visible}
    textarea[data-key="special.notes"]{display:none!important}
    .special-notes-print{
      display:block!important;
      white-space:pre-wrap!important;
      word-break:break-word!important;
      line-height:1.48!important;
      margin:0!important;
      padding:0!important;
      color:#000!important;
    }
    .project-info [data-key="project.languages"],
    .project-info [data-key="project.references"]{
      display:none!important;
    }
    .project-info .field-print-mirror{
      display:block!important;
      width:100%!important;
      margin:0!important;
      padding:0!important;
      color:#000!important;
      white-space:pre-wrap!important;
      overflow-wrap:anywhere!important;
      word-break:break-word!important;
      line-height:1.42!important;
    }
    .project-info td:has([data-key="project.workDays2"]){
      white-space:nowrap;
    }
    .project-info [data-key="project.workDays2"]{
      width:52px!important;
      min-width:52px!important;
      max-width:52px!important;
      text-align:center!important;
    }
    .project-info [data-key="project.revisionRounds2"],
    .project-info [data-key="project.warrantyDays2"]{
      width:44px!important;
      min-width:44px!important;
      max-width:44px!important;
      text-align:center!important;
    }
    .party-card,.amount-box{break-inside:avoid}
    .party-grid,.signature,.attachment-sign{break-inside:avoid}
    .attachment{break-before:page;margin-top:0;padding-top:0;border-top:0}
    .party-grid{margin:10px 0 14px;gap:12px}
    .party-card{padding:9px 11px 7px}
    .form-row{margin:3px 0}
    .contract-meta{margin-bottom:12px;padding-bottom:10px}
    .signature{margin-top:18px;padding-top:10px;gap:24px}
    .sign-box{min-height:125px}
    .sign-line{margin:5px 0}
    .section-title{margin:14px 0 6px;font-size:10.5pt}
    th,td{padding:5px 6px}
    .attachment-title{font-size:15pt;margin-bottom:14px}
    .checks{gap:4px 10px;margin:5px 0 7px}

    .attachment .checks{
      grid-template-columns:repeat(3,1fr)!important;
      gap:0!important;
      border:1px solid #bfc4ca;
      padding:0!important;
      margin:5px 0 7px!important;
    }
    .attachment .check{
      min-height:28px;
      padding:4px 8px;
      border-right:1px solid #d8dce1;
      border-bottom:1px solid #d8dce1;
      display:flex;
      align-items:center;
      gap:5px;
    }
    .attachment .check:nth-child(3n){
      border-right:0;
    }
    .attachment .check:nth-last-child(-n+3){
      border-bottom:0;
    }
    .attachment .check:has(input:not(:checked)){
      display:none!important;
    }
    .attachment .check input[type="checkbox"]{
      display:none!important;
    }
    .attachment .check:has(input:checked)::before{
      content:"✓";
      font-weight:700;
      margin-right:2px;
    }
    .amount-box{padding:8px 10px;margin:6px 0}
    #depositRate{
      width:42px!important;
      min-width:42px!important;
      max-width:42px!important;
      flex:0 0 42px!important;
      text-align:center!important;
    }
    .amount-box .inline-field{
      justify-content:flex-start!important;
    }
    .amount-box .inline-field > span:last-child{
      flex:0 0 auto!important;
      margin-left:2px!important;
    }
    .amount-note{
      grid-template-columns:80px minmax(0,1fr)!important;
      column-gap:4px!important;
      margin-top:5px!important;
      align-items:start!important;
    }
    .amount-note label{
      padding-top:0!important;
      color:#000!important;
      font-weight:700!important;
      line-height:1.48!important;
    }
    .amount-note textarea{
      color:#000!important;
      font-size:9.6pt!important;
      line-height:1.48!important;
      margin:0!important;
      padding:0!important;
      text-indent:0!important;
      vertical-align:top!important;
    }
    .field-help{font-size:8.5pt!important;margin-top:2px!important}

    .clause h2{
      break-after:avoid-page;
      page-break-after:avoid;
    }
    .clause h2 + ol,
    .clause h2 + p{
      break-before:avoid-page;
      page-break-before:avoid;
    }
    .clause li{
      orphans:2;
      widows:2;
    }
    .signature .sign-line{
      grid-template-columns:125px 1fr;
    }
    .attachment-sign{
      margin-top:12px;
      gap:24px;
    }
    .attachment-sign .sign-line{
      margin:3px 0;
      grid-template-columns:85px 1fr;
    }
    .attachment p{
      margin-top:6px!important;
      margin-bottom:4px!important;
    }
    .attachment textarea{
      height:auto!important;
      min-height:0!important;
      line-height:1.35!important;
    }
    .attachment .note{
      margin-top:4px!important;
      margin-bottom:3px!important;
    }
    .attachment-sign{
      margin-top:6px!important;
      gap:18px!important;
    }
    .attachment-sign .sign-line{
      margin:2px 0!important;
    }

    .attachment-sign,
    .attachment-sign *,
    .attachment-sign input{
      background:transparent!important;
      background-color:transparent!important;
      box-shadow:none!important;
      -webkit-box-shadow:none!important;
    }
    .paper{
      border-color:#e2e2e2;
    }
    table{break-inside:auto}
    tr{break-inside:avoid;break-after:auto}
    thead{display:table-header-group}
    .page-table input{min-width:0}
  }


/* v1.2.0 print refinements: attachment payment + confirmation spacing */
@media print {
  .project-info [data-key="payment.total2"] {
    width: 72px !important;
    min-width: 72px !important;
    max-width: 72px !important;
    margin: 0 2px !important;
    text-align: left !important;
  }

  .project-info [data-key="payment.method"] {
    width: 170px !important;
    min-width: 170px !important;
    max-width: 170px !important;
    margin-left: 4px !important;
  }

  .attachment .note + p {
    margin-top: 14px !important;
    margin-bottom: 8px !important;
  }

  .attachment-sign {
    margin-top: 10px !important;
  }
}


/* v1.2.0 payment print final alignment */
@media print {
  .project-info td:has([data-key="payment.total2"]) {
    white-space: nowrap;
  }

  .project-info [data-key="payment.total2"] {
    width: 58px !important;
    min-width: 58px !important;
    max-width: 58px !important;
    margin: 0 !important;
    text-align: left !important;
  }

  .project-info [data-key="payment.method"] {
    width: 145px !important;
    min-width: 145px !important;
    max-width: 145px !important;
    margin-left: 2px !important;
  }
}


/* v1.2.0 attachment title final style */
.attachment-title {
  font-size: 20px !important;
  font-weight: 700 !important;
}

@media print {
  .attachment-title {
    font-size: 20px !important;
    font-weight: 700 !important;
  }
}


/* v1.2.0 attachment confirmation two-column print */
@media print {
  .attachment-sign {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 24px !important;
    align-items: start !important;
    margin-top: 12px !important;
    break-inside: avoid !important;
  }

  .attachment-sign > div {
    min-width: 0 !important;
  }

  .attachment-sign .sign-line {
    grid-template-columns: 62px 1fr !important;
    gap: 6px !important;
    margin: 6px 0 !important;
  }
}


/* v1.2.0 final main signature print layout */
@media print {
  .signature {
    display: grid !important;
    grid-template-columns: 1fr 1fr !important;
    gap: 32px !important;
    align-items: start !important;
    break-inside: avoid !important;
  }

  .signature .sign-line {
    grid-template-columns: 72px 1fr !important;
    gap: 8px !important;
  }
}