diff --git a/Web/src/styles/rich-content.css b/Web/src/styles/rich-content.css
index a4578ec..2887c6f 100644
--- a/Web/src/styles/rich-content.css
+++ b/Web/src/styles/rich-content.css
@@ -98,18 +98,10 @@
   font-weight: 600;
 }
 
-.rich-html-content th:nth-child(1),
-.rich-html-content td:nth-child(1) {
-  width: 40%;
-}
-
-.rich-html-content th:nth-child(2),
-.rich-html-content td:nth-child(2),
-.rich-html-content th:nth-child(3),
-.rich-html-content td:nth-child(3),
-.rich-html-content th:nth-child(4),
-.rich-html-content td:nth-child(4) {
-  width: 20%;
+/* 通用列宽规则：第一列占 40%，其他列自动平分剩余 60% */
+.rich-html-content th:first-child,
+.rich-html-content td:first-child {
+  width: 30%;
 }
 
 /* 业务特定样式：收入、支出、高亮 */