diff --git a/backend/app/services/llm/enrichment.py b/backend/app/services/llm/enrichment.py
index 9d80ec7..bef0456 100644
--- a/backend/app/services/llm/enrichment.py
+++ b/backend/app/services/llm/enrichment.py
@@ -8,7 +8,7 @@
 
 排版容器 CSS(固定,不再让用户改):
 - 字体: system-ui 字体栈
-- 字号: 17px
+- 字号: 19px(2026-06 调大,从 17 → 19,提升阅读舒适度)
 - 行高: 1.7
 - 颜色: #3e3e3e
 - 段落: margin-bottom 1.5em(自动空一行);class 名固定为 diary-para
@@ -49,7 +49,7 @@ ARTICLE_BODY_FONT_FAMILY = (
     "system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, "
     "'Helvetica Neue', sans-serif"
 )
-ARTICLE_BODY_FONT_SIZE = "17px"
+ARTICLE_BODY_FONT_SIZE = "19px"
 ARTICLE_BODY_LINE_HEIGHT = "1.7"
 ARTICLE_BODY_COLOR = "#3e3e3e"
 ARTICLE_BODY_P_MARGIN_BOTTOM = "1.5em"
diff --git a/frontend/src/style.css b/frontend/src/style.css
index 3763d7f..f0aceb3 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -107,8 +107,8 @@ h3 { font-size: 18px; font-weight: 700; line-height: 1.4; }
   h3 { font-size: 17px; line-height: 1.45; }
 
   /* 文章正文:行高微调(屏幕窄,行高再松一点) */
-  .article-body { font-size: 16px; line-height: 1.8; }
-  .diary-para { font-size: 16px; line-height: 1.8; }
+  .article-body { font-size: 18px; line-height: 1.85; }
+  .diary-para { font-size: 18px; line-height: 1.85; }
 
   /* 评论钩子字号微调 */
   .commentary-box { font-size: 13px; padding: 10px 12px; }
@@ -132,8 +132,8 @@ h3 { font-size: 18px; font-weight: 700; line-height: 1.4; }
     padding: 10px 12px !important;
   }
   h1 { font-size: 20px; }
-  .article-body { font-size: 15.5px; }
-  .diary-para { font-size: 15.5px; }
+  .article-body { font-size: 17px; }
+  .diary-para { font-size: 17px; }
 }
 
 /* 工具类:手机端隐藏侧栏相关装饰 */
@@ -170,11 +170,12 @@ h3 { font-size: 18px; font-weight: 700; line-height: 1.4; }
  * 后端 enrichment 也会在容器 div 上内联同样的属性;这里做兜底,
  * 万一 inline style 被 sanitizer 剥掉,样式仍生效。
  * 与 backend/app/services/llm/enrichment.py 里的常量保持一致。
+ * 2026-06 字号从 17px 调到 19px,提升阅读舒适度
  */
 .article-body {
   font-family: var(--font-sans);
-  font-size: 17px;
-  line-height: 1.7;
+  font-size: 19px;
+  line-height: 1.75;
   color: var(--color-letter);
 }
 .article-body p {
@@ -187,9 +188,9 @@ h3 { font-size: 18px; font-weight: 700; line-height: 1.4; }
 /* ===== 排版段落(.diary-para)兜底规则 ===== */
 .diary-para {
   margin: 0 0 1.5em 0;
-  line-height: 1.7;
+  line-height: 1.75;
   color: var(--color-letter);
-  font-size: 17px;
+  font-size: 19px;
 }
 .diary-para:last-child {
   margin-bottom: 0;