.pdfconvert_container {
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  flex: 1;
  max-height: 100%;
  overflow: hidden;
}

/* 标签页：与语音 / 翻译一致，按文字宽度排列，不强制三等分铺满 */
.pdfconvert_container .pdfconvert-nav-tabs {
  border-bottom: 2px solid #dee2e6;
}
.pdfconvert_container .pdfconvert-nav-tabs .nav-item {
  flex: 0 0 auto;
}
.pdfconvert_container .pdfconvert-nav-tabs .nav-link {
  width: auto;
  border: none;
  border-bottom: 3px solid transparent;
  border-radius: 0.6rem 0.6rem 0 0;
  padding: 0.65rem 1rem;
  font-size: 1rem;
  font-weight: 600 !important;
  color: #6c757d;
  background: #f8f9fa;
  min-height: 44px;
}
.pdfconvert_container .pdfconvert-nav-tabs .nav-link:hover {
  color: #0d6efd;
  border-bottom-color: rgba(13, 110, 253, 0.3);
}
.pdfconvert_container .pdfconvert-nav-tabs .nav-link.active {
  color: #0d6efd;
  background: #fff;
  border-bottom-color: #0d6efd;
}

/* 标签页内容与下方「文件 + 处理」同一宽度，避免下拉全宽而按钮行更宽导致右缘不齐 */
.pdfconvert_container .pdfconvert-main-inner {
  max-width: 1100px;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  padding-left: 0.75rem;
  padding-right: 0.75rem;
  box-sizing: border-box;
}

.pdfconvert_container .pdf-tab-pane {
  margin: 0;
}

/* 标签单独一行；文件与「处理」同一行仅两控件垂直居中（说明文字单独一行，避免拉高右列导致对不齐） */
@media (min-width: 768px) {
  .pdfconvert_container .pdfconvert-action-label-row {
    margin-bottom: 0.35rem;
  }
  .pdfconvert_container .pdfconvert-action-row {
    align-items: center;
  }
  .pdfconvert_container .pdfconvert-submit-col .pdfconvert-submit-btn {
    width: auto;
    min-width: 7.5rem;
  }
  .pdfconvert_container .pdfconvert-action-hint-row .pdfconvert-action-hint {
    text-align: right;
  }
  /* 与「处理」按钮同高，避免文件框偏矮导致视觉不齐 */
  .pdfconvert_container .pdfconvert-action-row input[type="file"].form-control {
    min-height: 44px;
    line-height: 1.5;
  }
}

/* 字段标签（与翻译/语音可读性一致） */
.pdfconvert_container .pdfconvert-field-label {
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: #495057;
  margin-bottom: 0.35rem;
}

.pdfconvert_container .pdfconvert-hint-bar {
  border-left: 4px solid #dc3545;
  padding-left: 0.75rem;
  line-height: 1.45;
}

/* 文本框、下拉：圆角与边框统一；下拉高度与默认 form-select 一致，不占满整行 */
.pdfconvert_container .form-select,
.pdfconvert_container .form-control {
  border-radius: 8px;
  border: 1px solid #ced4da;
  font-size: 1rem;
}
.pdfconvert_container .pdf-tab-pane select.form-select {
  width: auto;
  max-width: min(100%, 22rem);
  min-height: calc(1.5em + 0.75rem + 2px);
  padding: 0.375rem 2.25rem 0.375rem 0.75rem;
  font-size: 1rem;
  line-height: 1.5;
}
/* 水印行多列布局：下拉仍随列宽铺满 */
.pdfconvert_container #addWatermarkRow select.form-select {
  max-width: 100%;
  width: 100%;
}
/* 设置密码、删除页面页码等：与下拉同最大宽度，不占满整行 */
.pdfconvert_container #password_text,
.pdfconvert_container #nonContinuousIndex,
.pdfconvert_container #continuousStartIndex,
.pdfconvert_container #continuousEndIndex {
  width: 100%;
  max-width: min(100%, 22rem);
}
.pdfconvert_container .form-control:not([type="file"]) {
  min-height: 44px;
  padding: 0.45rem 0.75rem;
}
.pdfconvert_container input[type="file"].form-control {
  padding: 0.5rem 0.75rem;
}
.pdfconvert_container .form-select:focus,
.pdfconvert_container .form-control:focus {
  border-color: rgba(13, 110, 253, 0.55);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.pdfconvert_container .pdfconvert-submit-btn {
  min-height: 44px;
  padding: 0.55rem 1.25rem;
  font-size: 0.95rem;
  width: auto;
}

.pdfconvert_container .btn.btn-success {
  min-height: 44px;
  padding: 0.55rem 1rem;
}

.pdfconvert_container .row {
  row-gap: 0.5rem;
}