/* PDF 工具 */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 36px 16px;
    text-align: center;
    cursor: pointer;
    background: var(--surface-2);
    transition: all 0.2s;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
}
.upload-zone .upload-icon { font-size: 42px; color: #94a3b8; margin-bottom: 10px; }
.preview-list { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.preview-thumb {
    width: 72px; height: 72px;
    border-radius: 8px;
    border: 1px solid var(--border);
    object-fit: cover;
    background: #fff;
}
.pdf-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}
.pdf-info-item {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 14px;
    text-align: center;
}
.pdf-info-item .label { font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.pdf-info-item .value { font-size: 18px; font-weight: 700; color: var(--text); }
.download-row { margin-top: 14px; text-align: center; }
@media (max-width: 575px) {
    .pdf-info-grid { grid-template-columns: 1fr; }
}