fix(docx): apply the default paragraph style to pStyle-less paragraphs

crates/office2pdf/src/parser/docx_style_tests.rs

@@ -300,3 +300,45 @@ fn test_direct_jc_center_applied_to_paragraph() {
 
     assert_eq!(para.style.alignment, Some(Alignment::Center));
 }
+
+#[test]
+fn test_default_paragraph_style_applies_without_pstyle() {
+    // w:default="1" marks the style that paragraphs without an explicit
+    // pStyle inherit (issue #288): its spacing must survive the cascade.
+    let mut normal = docx_rs::Style::new("Normal", docx_rs::StyleType::Paragraph)
+        .name("Normal")
+        .size(24)
+        .line_spacing(
+            docx_rs::LineSpacing::new()
+                .after(160)
+                .line(360)
+                .line_rule(docx_rs::LineSpacingType::Auto),
+        );
+    normal.default = true;
+
+    let data = build_docx_bytes_with_styles(
+        vec![docx_rs::Paragraph::new().add_run(docx_rs::Run::new().add_text("본문 문단"))],
+        vec![normal],
+    );
+
+    let parser = DocxParser;
+    let (doc, _warnings) = parser.parse(&data, &ConvertOptions::default()).unwrap();
+
+    let Page::Flow(flow) = &doc.pages[0] else {
+        panic!("expected flow page");
+    };
+    let Block::Paragraph(paragraph) = flow
+        .content
+        .iter()
+        .find(|b| matches!(b, Block::Paragraph(_)))
+        .expect("paragraph")
+    else {
+        unreachable!()
+    };
+    assert_eq!(
+        paragraph.style.space_after,
+        Some(8.0),
+        "default style spacing (160 twips = 8pt) must apply to pStyle-less paragraphs"
+    );
+    assert_eq!(paragraph.runs[0].style.font_size, Some(12.0));
+}

crates/office2pdf/src/parser/docx_styles.rs

@@ -94,6 +94,27 @@ pub(super) fn build_style_map(styles: &docx_rs::Styles) -> StyleMap {
         }
     }
 
+    // Paragraphs without an explicit pStyle inherit the default paragraph
+    // style (w:default="1", normally "Normal"), not just the bare document
+    // defaults — fold it into the synthetic doc-default entry so its spacing,
+    // line spacing, and text properties survive the cascade (issue #288).
+    let default_paragraph_style_id: Option<String> = styles
+        .styles
+        .iter()
+        .find(|style| style.default && style.style_type == docx_rs::StyleType::Paragraph)
+        .map(|style| style.style_id.clone());
+    if let Some(style_id) = default_paragraph_style_id
+        && let Some(default_style) = map.get(&style_id)
+    {
+        let merged = ResolvedStyle {
+            text: default_style.text.clone(),
+            paragraph: default_style.paragraph.clone(),
+            paragraph_tab_overrides: default_style.paragraph_tab_overrides.clone(),
+            heading_level: None,
+        };
+        map.insert(DOC_DEFAULT_STYLE_ID.to_string(), merged);
+    }
+
     map
 }