diff --git a/TeXmacs/misc/themes/liii.css b/TeXmacs/misc/themes/liii.css
index 500c30a6f6f3c2edf829508bb0ed6435ee717810..e0abb8aeefb7c4d49516a671a11dd3b072493cd7 100644
--- a/TeXmacs/misc/themes/liii.css
+++ b/TeXmacs/misc/themes/liii.css
@@ -381,7 +381,52 @@ QDialog QWidget {
 
 QDialog {
   background: #ffffff;
-  border: 1px solid #e0e0e0;
+  border: 1.5px solid #bdbdbd;
+  min-width: 420px;
+  min-height: 180px;
+  padding: 24px 32px 20px 32px;
+}
+
+QDialog QLabel {
+  margin-bottom: 12px;
+}
+
+QDialog QLabel#titleLabel {
+  font-weight: bold;
+  margin-bottom: 8px;
+}
+
+QDialog QDialogButtonBox {
+  qproperty-centerButtons: true;
+  padding-top: 18px;
+  padding-bottom: 2px;
+  spacing: 18px;
+}
+
+QDialog QPushButton {
+  background: #f5f5f5;
+  color: #2c2c2c;
+  border: 1.5px solid #bdbdbd;
+  border-radius: 6px;
+  padding: 7px 18px;
+  min-width: 70px;
+  min-height: 28px;
+  text-decoration: none;
+  margin-left: 8px;
+  margin-right: 8px;
+}
+
+QDialog QPushButton:hover,
+QDialog QPushButton:focus {
+  border: 2px solid #222;
+  color: #222;
+  outline: none;
+}
+
+QDialog QPushButton:disabled {
+  background: #f5f5f5;
+  color: #a0a0a0;
+  border: 1.5px solid #e0e0e0;
 }
 
 /****************************************************************************
diff --git a/devel/202_17.md b/devel/202_17.md
new file mode 100644
index 0000000000000000000000000000000000000000..9d31809bab18070226a5cbb69a2ed1a4158b6a9d
--- /dev/null
+++ b/devel/202_17.md
@@ -0,0 +1,7 @@
+# [202_16] 修改 liii 主题中关于对话框的样式
+
+## 2025/07/15
+
+### What
+
+修改了 TeXmacs/misc/themes/liii.css，增加了对于对话框的样式。