diff --git a/lib/theme/sql_highlight.dart b/lib/theme/sql_highlight.dart
new file mode 100644
index 0000000..4cd1f4c
--- /dev/null
+++ b/lib/theme/sql_highlight.dart
@@ -0,0 +1,162 @@
+/// SQL / DDL 语法高亮的共享层:配色表 + 只读文本的同步 TextSpan 渲染。
+///
+/// 三条约定:
+/// - 配色是中调色、与 [AppPalette] 无关的固定值(明亮近似 SSMS / VS Code Light+,
+///   暗黑近似 VS Code Dark+),因此**不进主题定制弹窗**,也不走 token 取色;
+///   以前它在三个文件里各抄了一份(query_page / table_designer_page /
+///   routine_design_page),改一处漏两处,现在只有这里一份。
+/// - **只读**展示位(详情面板 DDL 页、建库 / 修改库的脚本预览、结构同步脚本)
+///   用 [highlightedSqlSpan] + `SelectableText.rich`:同步出帧,首帧就是彩色,
+///   不存在「先裸文本再等 isolate 回帧」的慢半拍。可编辑处仍走 re_editor 的
+///   `CodeEditor`(它把解析放 isolate,但带行号槽 / 查找栏 / 编辑器外壳,
+///   塞进窄面板过重),两边共用本文件的配色表。
+/// - 解析失败、或解析结果**掉了字符**,一律退回裸文本:高亮是锦上添花,
+///   不能反过来把 DDL 弄没了一截。
+library;
+
+import 'package:flutter/painting.dart';
+import 'package:re_highlight/languages/sql.dart';
+import 'package:re_highlight/re_highlight.dart';
+
+import 'app_theme.dart';
+
+/// 明亮主题配色(键 = re_highlight 的 token scope)
+const Map<String, TextStyle> sqlLightTheme = {
+  'keyword': TextStyle(color: Color(0xff0000ff)),
+  'literal': TextStyle(color: Color(0xff001080)),
+  'name': TextStyle(color: Color(0xff001080)),
+  'attr': TextStyle(color: Color(0xff001080)),
+  'variable': TextStyle(color: Color(0xff001080)),
+  'meta': TextStyle(color: Color(0xff001080)),
+  'string': TextStyle(color: Color(0xffa31515)),
+  'quote': TextStyle(color: Color(0xffa31515)),
+  'regexp': TextStyle(color: Color(0xffa31515)),
+  'comment': TextStyle(color: Color(0xff008000), fontStyle: FontStyle.italic),
+  'doctag': TextStyle(color: Color(0xff800000)),
+  'section': TextStyle(color: Color(0xff800000)),
+  'number': TextStyle(color: Color(0xff098658)),
+  'symbol': TextStyle(color: Color(0xff098658)),
+  'type': TextStyle(color: Color(0xff267f99)),
+  'class-title': TextStyle(color: Color(0xff267f99)),
+  'built_in': TextStyle(color: Color(0xff795e26)),
+  'title': TextStyle(color: Color(0xff795e26)),
+};
+
+/// 暗黑主题配色
+const Map<String, TextStyle> sqlDarkTheme = {
+  'keyword': TextStyle(color: Color(0xff569cd6)),
+  'literal': TextStyle(color: Color(0xff569cd6)),
+  'name': TextStyle(color: Color(0xff9cdcfe)),
+  'attr': TextStyle(color: Color(0xff9cdcfe)),
+  'variable': TextStyle(color: Color(0xff9cdcfe)),
+  'meta': TextStyle(color: Color(0xff9cdcfe)),
+  'string': TextStyle(color: Color(0xffce9178)),
+  'quote': TextStyle(color: Color(0xffce9178)),
+  'regexp': TextStyle(color: Color(0xffd16969)),
+  'comment': TextStyle(color: Color(0xff6a9955), fontStyle: FontStyle.italic),
+  'doctag': TextStyle(color: Color(0xff6a9955)),
+  'section': TextStyle(color: Color(0xff6a9955)),
+  'number': TextStyle(color: Color(0xffb5cea8)),
+  'symbol': TextStyle(color: Color(0xffb5cea8)),
+  'type': TextStyle(color: Color(0xff4ec9b0)),
+  'class-title': TextStyle(color: Color(0xff4ec9b0)),
+  'built_in': TextStyle(color: Color(0xffdcdcaa)),
+  'title': TextStyle(color: Color(0xffdcdcaa)),
+};
+
+/// 交给 `CodeHighlightTheme.theme` 的完整配色:明暗取表 + 覆盖 `root`。
+///
+/// `root` 是 re_editor 给「没命中任何 scope 的裸文本」查的键,不覆盖就会掉回
+/// 它自带的默认色(亮色主题下是深色,反过来也一样),换肤时文字跟着变黑 / 变白。
+Map<String, TextStyle> sqlEditorTheme({
+  required bool isDark,
+  required Color foreground,
+}) =>
+    {
+      ...(isDark ? sqlDarkTheme : sqlLightTheme),
+      'root': TextStyle(color: foreground),
+    };
+
+/// 只读代码文本的统一字体:Consolas 优先、回落 monospace
+/// (与既有脚本预览一致;可编辑的 CodeEditor 用的是 'monospace',不在此列)。
+///
+/// [height] 传 null = 沿用 Flutter 默认行距(各展示位原有的行高不同,
+/// 这里不替它们统一,免得顺手改排版)。
+///
+/// `decoration: none` 是硬性要求——高亮出来的子 span 只带 color,
+/// 一旦哪天脱离 Material 的 DefaultTextStyle 兜底,就会冒出双黄线 / 加粗。
+TextStyle sqlCodeStyle({
+  required Color color,
+  double fontSize = 12,
+  double? height = 1.45,
+}) =>
+    TextStyle(
+      fontFamily: 'Consolas',
+      fontFamilyFallback: const ['monospace'],
+      fontSize: fontSize,
+      height: height,
+      color: color,
+      decoration: TextDecoration.none,
+    );
+
+Highlight? _highlighter;
+
+/// 复用同一个 [Highlight]:langSql 整套语法在首次 `highlight()` 时才编译
+/// (`_compileLanguage` 把结果缓存在 Mode 上),每次新建实例等于白付一遍编译。
+Highlight get _sqlHighlighter =>
+    _highlighter ??= (Highlight()..registerLanguage('sql', langSql));
+
+/// 单条 memo:详情面板 / 脚本预览在 hover、换肤等重建里会反复传同一段文本,
+/// 解析虽然只有毫秒级,但没必要每次 build 都重跑。换文本即失效。
+({String code, bool isDark, TextStyle base})? _lastRequest;
+TextSpan? _lastSpan;
+
+/// 把一段 SQL / DDL 解析成带高亮的 [TextSpan],供 `Text.rich` /
+/// `SelectableText.rich` 直接渲染。
+///
+/// 字体与明暗都从 [palette] 推导:明暗口径沿用全应用既有的「按 background 亮度」
+/// 判法,不走 `Theme.of` —— 定制色板下两者可能不一致。字号 / 行高各展示位不同,
+/// 故仍留参数。
+///
+/// 返回的是**根 span**,兜底字体([sqlCodeStyle])挂在它身上,命中的 scope 子 span
+/// 只带自己的颜色与斜体、字号与字体沿用它——所以调用方直接 `Text.rich(span)` 即可,
+/// **不要再传 `style:`**(传了会被这里的根样式盖掉,反而看不出问题)。
+/// 解析异常或语法不认识时返回纯文本 span,不抛。
+TextSpan highlightedSqlSpan(
+  String code, {
+  required AppPalette palette,
+  double fontSize = 12,
+  double? height = 1.45,
+}) {
+  final isDark = palette.background.computeLuminance() < 0.5;
+  final base = sqlCodeStyle(
+    color: palette.foreground,
+    fontSize: fontSize,
+    height: height,
+  );
+  if (code.isEmpty) return TextSpan(text: code, style: base);
+  final request = (code: code, isDark: isDark, base: base);
+  final cached = _lastSpan;
+  if (cached != null && request == _lastRequest) return cached;
+
+  TextSpan span;
+  try {
+    final renderer = TextSpanRenderer(
+      base,
+      isDark ? sqlDarkTheme : sqlLightTheme,
+    );
+    _sqlHighlighter.highlight(code: code, language: 'sql').render(renderer);
+    final inner = renderer.span;
+    span = inner == null
+        ? TextSpan(text: code, style: base)
+        : TextSpan(style: base, children: [inner]);
+  } catch (_) {
+    span = TextSpan(text: code, style: base);
+  }
+  // 自校验:scope 切分一旦掉了字符(撞上奇怪的字节序列时真会发生),
+  // 宁可整段退回裸文本,也不能让界面上的 DDL 少一截——少的那截没人看得见。
+  if (span.toPlainText() != code) span = TextSpan(text: code, style: base);
+  _lastRequest = request;
+  _lastSpan = span;
+  return span;
+}
diff --git a/lib/widgets/create_database_dialog.dart b/lib/widgets/create_database_dialog.dart
index 75bd76a..5b7a324 100644
--- a/lib/widgets/create_database_dialog.dart
+++ b/lib/widgets/create_database_dialog.dart
@@ -7,6 +7,7 @@ import '../data/create_database_catalog.dart';
 import '../data/db_create_options.dart';
 import '../data/db_data.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 
 /// 校验失败提示的红:与 `mcp_settings_dialog.dart` / `query_page.dart` 同一
 /// 中调色,主题无关(色板里没有语义错误色)。
@@ -614,15 +615,9 @@ class _CreateDatabaseDialogState extends State<CreateDatabaseDialog> {
       ),
       child: SingleChildScrollView(
         padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
-        child: SelectableText(
-          script,
-          style: TextStyle(
-            fontFamily: 'Consolas',
-            fontFamilyFallback: const ['monospace'],
-            fontSize: 12,
-            color: t.foreground,
-            decoration: TextDecoration.none,
-          ),
+        child: SelectableText.rich(
+          // 与详情面板 DDL 页同款高亮;行距沿用这里原本的默认值,不顺手改排版。
+          highlightedSqlSpan(script, palette: t, height: null),
         ),
       ),
     );
diff --git a/lib/widgets/database_edit_dialog.dart b/lib/widgets/database_edit_dialog.dart
index f559b37..5685df5 100644
--- a/lib/widgets/database_edit_dialog.dart
+++ b/lib/widgets/database_edit_dialog.dart
@@ -8,6 +8,7 @@ import '../data/database_edit_catalog.dart';
 import '../data/db_data.dart';
 import '../data/db_edit_options.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 
 /// 校验失败提示的红:与「新建数据库」同一中调色,主题无关(色板里没有语义错误色)。
 const Color _kErrorColor = Color(0xffd93025);
@@ -635,15 +636,9 @@ class _DatabaseEditDialogState extends State<DatabaseEditDialog> {
               ),
               child: SingleChildScrollView(
                 padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 8),
-                child: SelectableText(
-                  script,
-                  style: TextStyle(
-                    fontFamily: 'Consolas',
-                    fontFamilyFallback: const ['monospace'],
-                    fontSize: 12,
-                    color: t.foreground,
-                    decoration: TextDecoration.none,
-                  ),
+                child: SelectableText.rich(
+                  // 与详情面板 DDL 页同款高亮;行距沿用这里原本的默认值,不顺手改排版。
+                  highlightedSqlSpan(script, palette: t, height: null),
                 ),
               ),
             ),
diff --git a/lib/widgets/database_info.dart b/lib/widgets/database_info.dart
index 636af82..1ba49e7 100644
--- a/lib/widgets/database_info.dart
+++ b/lib/widgets/database_info.dart
@@ -11,6 +11,7 @@ import '../data/drivers/kv_driver.dart';
 import '../data/table_design.dart';
 import '../l10n/locale_config.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'object_category_icon.dart';
 
 // 右侧对象详情面板:根据当前选中节点展示不同信息。
@@ -996,15 +997,10 @@ class _DdlText extends StatelessWidget {
           child: SingleChildScrollView(
             padding: const EdgeInsets.fromLTRB(
                 _panePadding, 14, _panePadding, _panePadding),
-            child: Text(
-              sql,
-              style: TextStyle(
-                fontFamily: 'monospace',
-                fontSize: 12,
-                height: 1.45,
-                color: t.foreground,
-              ),
-            ),
+            // 与表设计器「SQL 预览」同款高亮:同步解析出帧,首帧就是彩色,
+            // 不会有「先裸文本、等 isolate 回帧再上色」的慢半拍。
+            // 可划选(局部复制),右上角的整段复制按钮照旧保留。
+            child: SelectableText.rich(highlightedSqlSpan(sql, palette: t)),
           ),
         ),
         Positioned(
diff --git a/lib/widgets/matview_design_page.dart b/lib/widgets/matview_design_page.dart
index c5a3191..37b0e6c 100644
--- a/lib/widgets/matview_design_page.dart
+++ b/lib/widgets/matview_design_page.dart
@@ -10,8 +10,8 @@ import '../data/db_data.dart';
 import '../data/matview_sql.dart';
 import '../l10n/locale_config.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'query_page.dart' show formatSql;
-import 'routine_design_page.dart' show sqlLightTheme, sqlDarkTheme;
 import 'sql_find_bar.dart';
 
 /// 实体化视图设计器(按 Navicat 的实体化视图编辑器还原)。
@@ -1159,10 +1159,7 @@ class _MatViewDesignPageState extends State<MatViewDesignPage> {
           languages: {
             'sql': CodeHighlightThemeMode(mode: langSql),
           },
-          theme: {
-            ...(isDark ? sqlDarkTheme : sqlLightTheme),
-            'root': TextStyle(color: t.foreground),
-          },
+          theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
         ),
       ),
       indicatorBuilder: showLineNumbers
diff --git a/lib/widgets/query_page.dart b/lib/widgets/query_page.dart
index ba07124..aa26e26 100644
--- a/lib/widgets/query_page.dart
+++ b/lib/widgets/query_page.dart
@@ -17,6 +17,7 @@ import '../data/sql_completions.dart';
 import '../data/sql_split.dart';
 import '../l10n/locale_config.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'result_export_dialog.dart';
 import 'sql_find_bar.dart';
 
@@ -1319,10 +1320,7 @@ class _QueryPageState extends State<QueryPage> {
             languages: {
               'sql': CodeHighlightThemeMode(mode: langSql),
             },
-            theme: {
-              ...(isDark ? _sqlDarkTheme : _sqlLightTheme),
-              'root': TextStyle(color: t.foreground),
-            },
+            theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
           ),
         ),
         indicatorBuilder:
@@ -2252,54 +2250,6 @@ String formatSql(String input) {
   return lines.join('\n');
 }
 
-// ────────────────────────────────────────────────────────────
-// SQL 语法高亮配色(re_highlight 主题映射,中调色主题无关)
-// ────────────────────────────────────────────────────────────
-
-/// 明亮主题:近似 SSMS / VS Code Light+(关键字蓝、字符串红、注释绿)
-const Map<String, TextStyle> _sqlLightTheme = {
-  'keyword': TextStyle(color: Color(0xff0000ff)),
-  'literal': TextStyle(color: Color(0xff001080)),
-  'name': TextStyle(color: Color(0xff001080)),
-  'attr': TextStyle(color: Color(0xff001080)),
-  'variable': TextStyle(color: Color(0xff001080)),
-  'meta': TextStyle(color: Color(0xff001080)),
-  'string': TextStyle(color: Color(0xffa31515)),
-  'quote': TextStyle(color: Color(0xffa31515)),
-  'regexp': TextStyle(color: Color(0xffa31515)),
-  'comment': TextStyle(color: Color(0xff008000), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff800000)),
-  'section': TextStyle(color: Color(0xff800000)),
-  'number': TextStyle(color: Color(0xff098658)),
-  'symbol': TextStyle(color: Color(0xff098658)),
-  'type': TextStyle(color: Color(0xff267f99)),
-  'class-title': TextStyle(color: Color(0xff267f99)),
-  'built_in': TextStyle(color: Color(0xff795e26)),
-  'title': TextStyle(color: Color(0xff795e26)),
-};
-
-/// 暗黑主题:近似 VS Code Dark+
-const Map<String, TextStyle> _sqlDarkTheme = {
-  'keyword': TextStyle(color: Color(0xff569cd6)),
-  'literal': TextStyle(color: Color(0xff569cd6)),
-  'name': TextStyle(color: Color(0xff9cdcfe)),
-  'attr': TextStyle(color: Color(0xff9cdcfe)),
-  'variable': TextStyle(color: Color(0xff9cdcfe)),
-  'meta': TextStyle(color: Color(0xff9cdcfe)),
-  'string': TextStyle(color: Color(0xffce9178)),
-  'quote': TextStyle(color: Color(0xffce9178)),
-  'regexp': TextStyle(color: Color(0xffd16969)),
-  'comment': TextStyle(color: Color(0xff6a9955), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff6a9955)),
-  'section': TextStyle(color: Color(0xff6a9955)),
-  'number': TextStyle(color: Color(0xffb5cea8)),
-  'symbol': TextStyle(color: Color(0xffb5cea8)),
-  'type': TextStyle(color: Color(0xff4ec9b0)),
-  'class-title': TextStyle(color: Color(0xff4ec9b0)),
-  'built_in': TextStyle(color: Color(0xffdcdcaa)),
-  'title': TextStyle(color: Color(0xffdcdcaa)),
-};
-
 // ────────────────────────────────────────────────────────────
 // SQL 补全提示面板
 // ────────────────────────────────────────────────────────────
diff --git a/lib/widgets/routine_design_page.dart b/lib/widgets/routine_design_page.dart
index b8495e7..fc9509d 100644
--- a/lib/widgets/routine_design_page.dart
+++ b/lib/widgets/routine_design_page.dart
@@ -6,6 +6,7 @@ import 'package:re_highlight/languages/sql.dart';
 import '../app/app_state.dart';
 import '../data/routine_sql.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'sql_find_bar.dart';
 
 /// 例程设计页:展示并编辑过程 / 函数 / 视图的 CREATE 定义。
@@ -827,10 +828,7 @@ class _RoutineDesignPageState extends State<RoutineDesignPage> {
           languages: {
             'sql': CodeHighlightThemeMode(mode: langSql),
           },
-          theme: {
-            ...(isDark ? sqlDarkTheme : sqlLightTheme),
-            'root': TextStyle(color: t.foreground),
-          },
+          theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
         ),
       ),
       indicatorBuilder:
@@ -906,47 +904,3 @@ class _RoutineDesignPageState extends State<RoutineDesignPage> {
         ),
       );
 }
-
-/// SQL 语法高亮配色(与查询页一致:明亮近似 SSMS / VS Code Light+,
-/// 暗黑近似 VS Code Dark+;中调色主题无关)
-const Map<String, TextStyle> sqlLightTheme = {
-  'keyword': TextStyle(color: Color(0xff0000ff)),
-  'literal': TextStyle(color: Color(0xff001080)),
-  'name': TextStyle(color: Color(0xff001080)),
-  'attr': TextStyle(color: Color(0xff001080)),
-  'variable': TextStyle(color: Color(0xff001080)),
-  'meta': TextStyle(color: Color(0xff001080)),
-  'string': TextStyle(color: Color(0xffa31515)),
-  'quote': TextStyle(color: Color(0xffa31515)),
-  'regexp': TextStyle(color: Color(0xffa31515)),
-  'comment': TextStyle(color: Color(0xff008000), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff800000)),
-  'section': TextStyle(color: Color(0xff800000)),
-  'number': TextStyle(color: Color(0xff098658)),
-  'symbol': TextStyle(color: Color(0xff098658)),
-  'type': TextStyle(color: Color(0xff267f99)),
-  'class-title': TextStyle(color: Color(0xff267f99)),
-  'built_in': TextStyle(color: Color(0xff795e26)),
-  'title': TextStyle(color: Color(0xff795e26)),
-};
-
-const Map<String, TextStyle> sqlDarkTheme = {
-  'keyword': TextStyle(color: Color(0xff569cd6)),
-  'literal': TextStyle(color: Color(0xff569cd6)),
-  'name': TextStyle(color: Color(0xff9cdcfe)),
-  'attr': TextStyle(color: Color(0xff9cdcfe)),
-  'variable': TextStyle(color: Color(0xff9cdcfe)),
-  'meta': TextStyle(color: Color(0xff9cdcfe)),
-  'string': TextStyle(color: Color(0xffce9178)),
-  'quote': TextStyle(color: Color(0xffce9178)),
-  'regexp': TextStyle(color: Color(0xffd16969)),
-  'comment': TextStyle(color: Color(0xff6a9955), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff6a9955)),
-  'section': TextStyle(color: Color(0xff6a9955)),
-  'number': TextStyle(color: Color(0xffb5cea8)),
-  'symbol': TextStyle(color: Color(0xffb5cea8)),
-  'type': TextStyle(color: Color(0xff4ec9b0)),
-  'class-title': TextStyle(color: Color(0xff4ec9b0)),
-  'built_in': TextStyle(color: Color(0xffdcdcaa)),
-  'title': TextStyle(color: Color(0xffdcdcaa)),
-};
diff --git a/lib/widgets/schema_sync_dialog.dart b/lib/widgets/schema_sync_dialog.dart
index 5e27801..81083ff 100644
--- a/lib/widgets/schema_sync_dialog.dart
+++ b/lib/widgets/schema_sync_dialog.dart
@@ -13,6 +13,7 @@ import '../data/db_types.dart';
 import '../data/drivers/db_driver.dart';
 import '../data/schema_sync.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'object_category_icon.dart';
 
 /// 打开「工具 → 结构同步」弹窗。
@@ -1436,18 +1437,20 @@ class _SchemaSyncDialogState extends State<SchemaSyncDialog> {
           Expanded(
             child: SingleChildScrollView(
               padding: const EdgeInsets.all(8),
-              // DDL 和脚本一样要能划选复制。
-              child: SelectableText(
-                showEmpty ? emptyHint : body,
-                style: TextStyle(
-                  fontFamily: 'Consolas',
-                  fontFamilyFallback: const ['monospace'],
-                  fontSize: 12,
-                  height: 1.4,
-                  color: showEmpty ? t.mutedForeground : t.foreground,
-                  decoration: TextDecoration.none,
-                ),
-              ),
+              // DDL 和脚本一样要能划选复制。空提示是文案不是 SQL,
+              // 走高亮解析只会把「（源不存在该对象）」染成怪色,故分支渲染。
+              child: showEmpty
+                  ? SelectableText(
+                      // showEmpty 的定义里已含 emptyHint != null,这里不用再判空。
+                      emptyHint,
+                      style: sqlCodeStyle(
+                        color: t.mutedForeground,
+                        fontSize: 12,
+                        height: 1.4,
+                      ),
+                    )
+                  : SelectableText.rich(
+                      highlightedSqlSpan(body, palette: t, height: 1.4)),
             ),
           ),
         ],
@@ -1523,17 +1526,18 @@ class _SchemaSyncDialogState extends State<SchemaSyncDialog> {
               padding: const EdgeInsets.all(10),
               // 只读但要能划选复制 → SelectableText(不用 Input/Textarea,那会带上
               // 编辑框的面与边框,和这里的「纯文本区」观感不符)。
-              child: SelectableText(
-                script.isEmpty ? '（未勾选任何可部署对象）' : script,
-                style: TextStyle(
-                  fontFamily: 'Consolas',
-                  fontFamilyFallback: const ['monospace'],
-                  fontSize: 12,
-                  height: 1.4,
-                  color: script.isEmpty ? t.mutedForeground : t.foreground,
-                  decoration: TextDecoration.none,
-                ),
-              ),
+              // 空态那行是提示文案,不参与高亮(理由同 _monoCard)。
+              child: script.isEmpty
+                  ? SelectableText(
+                      '（未勾选任何可部署对象）',
+                      style: sqlCodeStyle(
+                        color: t.mutedForeground,
+                        fontSize: 12,
+                        height: 1.4,
+                      ),
+                    )
+                  : SelectableText.rich(
+                      highlightedSqlSpan(script, palette: t, height: 1.4)),
             ),
           ),
         ),
@@ -1771,17 +1775,17 @@ class _DeployPreview extends StatelessWidget {
           ),
           child: SingleChildScrollView(
             padding: const EdgeInsets.all(8),
-            child: Text(
-              script.isEmpty ? '（无）' : script,
-              style: TextStyle(
-                fontFamily: 'Consolas',
-                fontFamilyFallback: const ['monospace'],
-                fontSize: 12,
-                height: 1.4,
-                color: t.foreground,
-                decoration: TextDecoration.none,
-              ),
-            ),
+            child: script.isEmpty
+                ? Text(
+                    '（无）',
+                    style: sqlCodeStyle(
+                      color: t.foreground,
+                      fontSize: 12,
+                      height: 1.4,
+                    ),
+                  )
+                : Text.rich(
+                    highlightedSqlSpan(script, palette: t, height: 1.4)),
           ),
         ),
       ],
diff --git a/lib/widgets/table_designer_page.dart b/lib/widgets/table_designer_page.dart
index 836ecdf..aa9f00f 100644
--- a/lib/widgets/table_designer_page.dart
+++ b/lib/widgets/table_designer_page.dart
@@ -12,6 +12,7 @@ import '../data/db_metadata.dart';
 import '../data/drivers/db_driver.dart';
 import '../data/table_design.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'index_column_picker_dialog.dart';
 import 'sql_find_bar.dart';
 
@@ -2513,10 +2514,7 @@ class _TableDesignerPageState extends State<TableDesignerPage> {
               cursorColor: t.foreground,
               codeTheme: CodeHighlightTheme(
                 languages: {'sql': CodeHighlightThemeMode(mode: langSql)},
-                theme: {
-                  ...(isDark ? _sqlDarkTheme : _sqlLightTheme),
-                  'root': TextStyle(color: t.foreground),
-                },
+                theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
               ),
             ),
             indicatorBuilder:
@@ -3575,46 +3573,3 @@ class _ModelTextareaState extends State<_ModelTextarea> {
     );
   }
 }
-
-// SQL 语法高亮配色(与查询页同款,中调色主题无关)
-const Map<String, TextStyle> _sqlLightTheme = {
-  'keyword': TextStyle(color: Color(0xff0000ff)),
-  'literal': TextStyle(color: Color(0xff001080)),
-  'name': TextStyle(color: Color(0xff001080)),
-  'attr': TextStyle(color: Color(0xff001080)),
-  'variable': TextStyle(color: Color(0xff001080)),
-  'meta': TextStyle(color: Color(0xff001080)),
-  'string': TextStyle(color: Color(0xffa31515)),
-  'quote': TextStyle(color: Color(0xffa31515)),
-  'regexp': TextStyle(color: Color(0xffa31515)),
-  'comment': TextStyle(color: Color(0xff008000), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff800000)),
-  'section': TextStyle(color: Color(0xff800000)),
-  'number': TextStyle(color: Color(0xff098658)),
-  'symbol': TextStyle(color: Color(0xff098658)),
-  'type': TextStyle(color: Color(0xff267f99)),
-  'class-title': TextStyle(color: Color(0xff267f99)),
-  'built_in': TextStyle(color: Color(0xff795e26)),
-  'title': TextStyle(color: Color(0xff795e26)),
-};
-
-const Map<String, TextStyle> _sqlDarkTheme = {
-  'keyword': TextStyle(color: Color(0xff569cd6)),
-  'literal': TextStyle(color: Color(0xff569cd6)),
-  'name': TextStyle(color: Color(0xff9cdcfe)),
-  'attr': TextStyle(color: Color(0xff9cdcfe)),
-  'variable': TextStyle(color: Color(0xff9cdcfe)),
-  'meta': TextStyle(color: Color(0xff9cdcfe)),
-  'string': TextStyle(color: Color(0xffce9178)),
-  'quote': TextStyle(color: Color(0xffce9178)),
-  'regexp': TextStyle(color: Color(0xffd16969)),
-  'comment': TextStyle(color: Color(0xff6a9955), fontStyle: FontStyle.italic),
-  'doctag': TextStyle(color: Color(0xff6a9955)),
-  'section': TextStyle(color: Color(0xff6a9955)),
-  'number': TextStyle(color: Color(0xffb5cea8)),
-  'symbol': TextStyle(color: Color(0xffb5cea8)),
-  'type': TextStyle(color: Color(0xff4ec9b0)),
-  'class-title': TextStyle(color: Color(0xff4ec9b0)),
-  'built_in': TextStyle(color: Color(0xffdcdcaa)),
-  'title': TextStyle(color: Color(0xffdcdcaa)),
-};
diff --git a/lib/widgets/user_design_page.dart b/lib/widgets/user_design_page.dart
index 0540ffe..6ba967b 100644
--- a/lib/widgets/user_design_page.dart
+++ b/lib/widgets/user_design_page.dart
@@ -8,7 +8,7 @@ import '../app/app_state.dart';
 import '../data/user_sql.dart';
 import '../l10n/locale_config.dart';
 import '../theme/app_theme.dart';
-import 'routine_design_page.dart' show sqlDarkTheme, sqlLightTheme;
+import '../theme/sql_highlight.dart';
 import 'sql_find_bar.dart';
 
 /// 用户 / 角色(User & Role)设计页。
@@ -1050,10 +1050,7 @@ class _UserDesignPageState extends State<UserDesignPage> {
           languages: {
             'sql': CodeHighlightThemeMode(mode: langSql),
           },
-          theme: {
-            ...(isDark ? sqlDarkTheme : sqlLightTheme),
-            'root': TextStyle(color: t.foreground),
-          },
+          theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
         ),
       ),
       indicatorBuilder:
diff --git a/lib/widgets/view_design_page.dart b/lib/widgets/view_design_page.dart
index 28390b0..097a63f 100644
--- a/lib/widgets/view_design_page.dart
+++ b/lib/widgets/view_design_page.dart
@@ -9,8 +9,8 @@ import '../app/app_state.dart';
 import '../data/db_data.dart';
 import '../data/routine_sql.dart';
 import '../theme/app_theme.dart';
+import '../theme/sql_highlight.dart';
 import 'query_page.dart' show formatSql;
-import 'routine_design_page.dart' show sqlLightTheme, sqlDarkTheme;
 import 'sql_find_bar.dart';
 import 'view_rule_dialog.dart';
 
@@ -1275,10 +1275,7 @@ class _ViewDesignPageState extends State<ViewDesignPage> {
           languages: {
             'sql': CodeHighlightThemeMode(mode: langSql),
           },
-          theme: {
-            ...(isDark ? sqlDarkTheme : sqlLightTheme),
-            'root': TextStyle(color: t.foreground),
-          },
+          theme: sqlEditorTheme(isDark: isDark, foreground: t.foreground),
         ),
       ),
       indicatorBuilder: showLineNumbers
diff --git a/test/create_database_dialog_test.dart b/test/create_database_dialog_test.dart
index 538b1a7..dba128c 100644
--- a/test/create_database_dialog_test.dart
+++ b/test/create_database_dialog_test.dart
@@ -108,7 +108,9 @@ void main() {
 
     await tester.tap(find.text('SQL 预览'));
     await tester.pumpAndSettle();
-    expect(find.textContaining('CREATE DATABASE "demo"'), findsOneWidget);
+    // 预览区现在是带语法高亮的富文本,finder 必须开 findRichText 才看得见。
+    expect(find.textContaining('CREATE DATABASE "demo"', findRichText: true),
+        findsOneWidget);
     expect(tester.takeException(), isNull);
   });
 
diff --git a/test/database_edit_dialog_test.dart b/test/database_edit_dialog_test.dart
index 9436d20..ad75768 100644
--- a/test/database_edit_dialog_test.dart
+++ b/test/database_edit_dialog_test.dart
@@ -217,7 +217,10 @@ void main() {
     expect(find.text('hstore'), findsOneWidget);
 
     await _showTab(tester, 'SQL 预览');
-    expect(find.textContaining('CREATE EXTENSION IF NOT EXISTS "pg_trgm"'),
+    // SQL 预览区现在是带语法高亮的富文本,finder 必须开 findRichText 才看得见。
+    expect(
+        find.textContaining('CREATE EXTENSION IF NOT EXISTS "pg_trgm"',
+            findRichText: true),
         findsOneWidget);
     expect(tester.takeException(), isNull);
   });
@@ -233,7 +236,8 @@ void main() {
     expect(find.text('hstore'), findsOneWidget);
 
     await _showTab(tester, 'SQL 预览');
-    expect(find.textContaining('DROP EXTENSION IF EXISTS "hstore"'),
+    expect(find.textContaining('DROP EXTENSION IF EXISTS "hstore"',
+            findRichText: true),
         findsOneWidget);
     expect(tester.takeException(), isNull);
   });
@@ -250,7 +254,9 @@ void main() {
     await tester.pumpAndSettle();
 
     await _showTab(tester, 'SQL 预览');
-    expect(find.textContaining('CREATE EXTENSION IF NOT EXISTS "btree_gin"'),
+    expect(
+        find.textContaining('CREATE EXTENSION IF NOT EXISTS "btree_gin"',
+            findRichText: true),
         findsOneWidget);
     expect(tester.takeException(), isNull);
   });
@@ -309,7 +315,8 @@ void main() {
   testWidgets('SQL 预览无改动时显示说明而非空框', (tester) async {
     await _open(tester);
     await _showTab(tester, 'SQL 预览');
-    expect(find.textContaining('没有需要执行的改动'), findsOneWidget);
+    expect(find.textContaining('没有需要执行的改动', findRichText: true),
+        findsOneWidget);
     expect(tester.takeException(), isNull);
   });
 }
diff --git a/test/database_info_detail_test.dart b/test/database_info_detail_test.dart
index d00b66b..4571d35 100644
--- a/test/database_info_detail_test.dart
+++ b/test/database_info_detail_test.dart
@@ -234,8 +234,18 @@ void main() {
       await tester.pump();
 
       expect(driver.lastDefinitionKind, 'table');
-      expect(find.textContaining('CREATE TABLE `bx11_yz_payorder`'),
+      // DDL 页现在是带语法高亮的富文本,finder 必须开 findRichText 才看得见。
+      expect(find.textContaining('CREATE TABLE `bx11_yz_payorder`',
+              findRichText: true),
           findsOneWidget);
+      // 正文可划选(局部复制),按内容定位以免被面板上其它可选文本干扰。
+      final ddlTexts = tester
+          .widgetList<SelectableText>(find.byType(SelectableText))
+          .where((w) => (w.textSpan?.toPlainText() ?? w.data ?? '')
+              .contains('CREATE TABLE'))
+          .toList();
+      expect(ddlTexts, hasLength(1));
+      expect(ddlTexts.single.selectionEnabled, isTrue);
       // 信息页正文此时被 DDL 页替换
       expect(find.text('引擎'), findsNothing);
     });
diff --git a/test/schema_sync_dialog_test.dart b/test/schema_sync_dialog_test.dart
index c9a8fd0..7883910 100644
--- a/test/schema_sync_dialog_test.dart
+++ b/test/schema_sync_dialog_test.dart
@@ -379,13 +379,17 @@ void main() {
     await tester.tap(find.text('v_only_src'));
     await tester.pumpAndSettle();
     expect(find.textContaining('源 · v_only_src'), findsOneWidget);
-    expect(find.textContaining('CREATE VIEW v_only_src'), findsWidgets);
+    // DDL / 脚本区现在是带高亮的富文本,finder 必须开 findRichText 才看得见。
+    expect(find.textContaining('CREATE VIEW v_only_src', findRichText: true),
+        findsWidgets);
 
     // 切到底部「部署脚本」页:拼接勾选对象的语句(删除未勾,不在脚本里)
     await tester.tap(find.text('部署脚本'));
     await tester.pumpAndSettle();
-    expect(find.textContaining('CREATE VIEW v_only_src'), findsWidgets);
-    expect(find.textContaining('DROP VIEW v_only_tgt'), findsNothing);
+    expect(find.textContaining('CREATE VIEW v_only_src', findRichText: true),
+        findsWidgets);
+    expect(find.textContaining('DROP VIEW v_only_tgt', findRichText: true),
+        findsNothing);
 
     // 下一步 → 部署页:目标服务器说明 + 复制脚本 + 部署选项,「开始」可用
     await tester.tap(find.text('下一步'));
@@ -405,7 +409,7 @@ void main() {
     // 执行过程落在消息日志里(部署开始会自动切到这个标签页)
     final logText = tester
         .widgetList<SelectableText>(find.byType(SelectableText))
-        .map((w) => w.data ?? '')
+        .map(_selectablePlainText)
         .join('\n');
     expect(logText, contains('--End--'));
     expect(logText, contains('Result: OK'));
@@ -510,7 +514,7 @@ void main() {
     // 勾了「在消息日志中包含部署查询」→ 日志展开 SQL,成功与失败各记一条
     final logText = tester
         .widgetList<SelectableText>(find.byType(SelectableText))
-        .map((w) => w.data ?? '')
+        .map(_selectablePlainText)
         .join('\n');
     expect(logText, contains('Query:'));
     expect(logText, contains('Result: OK'));
@@ -584,7 +588,7 @@ void main() {
         .textEditingValue
         .selection;
     expect(sel.isCollapsed, isFalse, reason: '脚本应能划出选区');
-    expect(sel.textInside(script.data!), isNotEmpty);
+    expect(sel.textInside(_selectablePlainText(script)), isNotEmpty);
 
     // 消息日志页同样是可划选文本(空态占位亦为 SelectableText)。
     await tester.tap(find.text('消息日志'));
@@ -595,6 +599,11 @@ void main() {
   });
 }
 
+/// 取只读文本区的内容:裸文本走 `data`,带语法高亮的是 `textSpan`
+/// (见 lib/theme/sql_highlight.dart),两者都当成纯字符串看。
+String _selectablePlainText(SelectableText w) =>
+    w.data ?? w.textSpan?.toPlainText() ?? '';
+
 /// 放大测试视口,避免 1040×700 大弹窗被默认 800×600 压扁 / 命中重叠。
 void _bigSurface(WidgetTester tester) {
   tester.view.physicalSize = const Size(1600, 1200);
diff --git a/test/sql_highlight_test.dart b/test/sql_highlight_test.dart
new file mode 100644
index 0000000..13e1433
--- /dev/null
+++ b/test/sql_highlight_test.dart
@@ -0,0 +1,166 @@
+import 'package:flutter/painting.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:daro/theme/app_theme.dart';
+import 'package:daro/theme/sql_highlight.dart';
+
+/// 钉住只读 SQL / DDL 高亮(详情面板 DDL 页、建库改库脚本预览、结构同步脚本)的口径。
+///
+/// 全部离线:不建驱动、不连库,只喂字符串。
+///
+/// 最要紧的一条是**文本无损**——高亮器是在原串上做 scope 切分,
+/// 一旦某个 scope 把字符吃掉,界面上就是「DDL 少了一截」而不会报错。
+void main() {
+  const ddl = "CREATE DATABASE `mysql` /*!140100 DEFAULT CHARACTER SET "
+      "utf8mb4 COLLATE utf8mb4_0900_ai_ci */ /*!80016 DEFAULT "
+      "ENCRYPTION='N' */";
+
+  List<TextSpan> flatten(InlineSpan root) {
+    final out = <TextSpan>[];
+    void walk(InlineSpan span) {
+      if (span is TextSpan) {
+        out.add(span);
+        for (final child in span.children ?? const <InlineSpan>[]) {
+          walk(child);
+        }
+      }
+    }
+
+    walk(root);
+    return out;
+  }
+
+  String plainText(InlineSpan root) =>
+      flatten(root).map((s) => s.text ?? '').join();
+
+  group('文本无损', () {
+    test('真实 MySQL 库 DDL 拼接回来与原文逐字相等', () {
+      final span = highlightedSqlSpan(ddl, palette: AppTheme.light);
+      expect(plainText(span), ddl);
+    });
+
+    test('多语句 / 注释 / 空行也不掉字符', () {
+      const sql = 'CREATE TABLE `t` (\n'
+          '  `id` int NOT NULL AUTO_INCREMENT, -- 主键\n'
+          '  `name` varchar(64) DEFAULT NULL,\n'
+          '  PRIMARY KEY (`id`)\n'
+          ') ENGINE=InnoDB;\n'
+          '\n'
+          "ALTER TABLE `t` ADD COLUMN `c` int COMMENT 'x';";
+      expect(plainText(highlightedSqlSpan(sql, palette: AppTheme.light)), sql);
+    });
+
+    test('空串直接给纯文本 span,不进解析器', () {
+      final span = highlightedSqlSpan('', palette: AppTheme.light);
+      expect(span.toPlainText(), '');
+      expect(span.style, isNotNull);
+    });
+
+    test('语法上说不通的输入只退回裸文本,不抛', () {
+      const junk = "SELECT '未闭合 /* ` ][ \u0000 \u0019 %%% ~~~ ^^^";
+      for (final palette in [AppTheme.light, AppTheme.dark]) {
+        expect(() => highlightedSqlSpan(junk, palette: palette), returnsNormally);
+        expect(plainText(highlightedSqlSpan(junk, palette: palette)), junk,
+            reason: '掉了字符就必须整段退回裸文本,界面不能少一截');
+      }
+    });
+  });
+
+  group('确实上了色', () {
+    test('明亮主题下 CREATE 走 keyword 色', () {
+      final span =
+          highlightedSqlSpan('CREATE TABLE t (a INT)', palette: AppTheme.light);
+      final keyword = sqlLightTheme['keyword']!.color!;
+      // 按「包含」而非「等于」判:语法器可能把 CREATE TABLE 当成一个词组命中。
+      expect(
+        flatten(span).any((s) =>
+            (s.text ?? '').toUpperCase().contains('CREATE') &&
+            s.style?.color == keyword),
+        isTrue,
+        reason: '关键字没上色 = 高亮其实没生效',
+      );
+    });
+
+    test('暗色主题取的是另一张表', () {
+      final span =
+          highlightedSqlSpan('CREATE TABLE t (a INT)', palette: AppTheme.dark);
+      final darkKeyword = sqlDarkTheme['keyword']!.color!;
+      final lightKeyword = sqlLightTheme['keyword']!.color!;
+      expect(darkKeyword, isNot(lightKeyword));
+      expect(
+        flatten(span).any((s) =>
+            (s.text ?? '').toUpperCase().contains('CREATE') &&
+            s.style?.color == darkKeyword),
+        isTrue,
+      );
+    });
+
+    test('注释是斜体', () {
+      final span = highlightedSqlSpan('SELECT 1 -- 备注\n', palette: AppTheme.light);
+      expect(
+        flatten(span)
+            .any((s) => s.style?.fontStyle == FontStyle.italic && s.text != null),
+        isTrue,
+      );
+    });
+  });
+
+  group('字号与字体由根 span 兜底', () {
+    test('根 span 带统一字体,命中的子 span 不各自塞字号', () {
+      final span = highlightedSqlSpan(ddl, palette: AppTheme.light);
+      expect(span.style?.fontFamily, 'Consolas');
+      expect(span.style?.fontSize, 12);
+      expect(span.style?.height, 1.45);
+      expect(span.style?.decoration, TextDecoration.none);
+      // 没命中任何 scope 的文本直接拿兜底样式(它本来就带字号),要看的是命中的那些。
+      final base = sqlCodeStyle(color: AppTheme.light.foreground);
+      final themed = flatten(span)
+          .where((s) => !identical(s, span) && s.style != base)
+          .toList();
+      expect(themed, isNotEmpty);
+      expect(themed.any((s) => s.style?.fontSize != null), isFalse,
+          reason: '子 span 自带字号会盖掉调用方的字号参数');
+    });
+
+    test('fontSize / height 参数能覆盖', () {
+      final span = highlightedSqlSpan(ddl,
+          palette: AppTheme.light, fontSize: 13, height: null);
+      expect(span.style?.fontSize, 13);
+      expect(span.style?.height, isNull, reason: 'null = 沿用默认行距,各展示位不统一');
+      expect(plainText(span), ddl);
+    });
+  });
+
+  group('memo 缓存', () {
+    test('同文本同色板命中同一实例', () {
+      final a = highlightedSqlSpan(ddl, palette: AppTheme.light);
+      final b = highlightedSqlSpan(ddl, palette: AppTheme.light);
+      expect(identical(a, b), isTrue);
+    });
+
+    test('换文本 / 换主题都作废', () {
+      final a = highlightedSqlSpan(ddl, palette: AppTheme.light);
+      expect(identical(a, highlightedSqlSpan('SELECT 1', palette: AppTheme.light)),
+          isFalse);
+      expect(identical(a, highlightedSqlSpan(ddl, palette: AppTheme.dark)), isFalse);
+      expect(
+          identical(a,
+              highlightedSqlSpan(ddl, palette: AppTheme.light, fontSize: 13)),
+          isFalse);
+    });
+  });
+
+  group('配色表只有一份', () {
+    test('明暗两张表的 scope 集合一致', () {
+      expect(sqlDarkTheme.keys.toSet(), sqlLightTheme.keys.toSet());
+    });
+
+    test('sqlEditorTheme 覆盖 root(编辑器兜底前景随主题)', () {
+      final theme =
+          sqlEditorTheme(isDark: false, foreground: AppTheme.light.foreground);
+      expect(theme.length, sqlLightTheme.length + 1);
+      expect(theme['root']!.color, AppTheme.light.foreground);
+      expect(theme['keyword']!.color, sqlLightTheme['keyword']!.color);
+    });
+  });
+}