diff --git a/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/DateSegment.java b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/DateSegment.java
new file mode 100644
index 00000000..382fd548
--- /dev/null
+++ b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/DateSegment.java
@@ -0,0 +1,20 @@
+package cn.code.nl.module.base.service.codegen.dto;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 日期段配置
+ *
+ * @author zhouz
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class DateSegment extends SegmentConfig {
+
+    /**
+     * 日期格式，如 "yyyyMMdd"、"yyyyMM"、"yyyy"
+     */
+    private String format;
+
+}
diff --git a/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/PrefixSegment.java b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/PrefixSegment.java
new file mode 100644
index 00000000..cd61a833
--- /dev/null
+++ b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/PrefixSegment.java
@@ -0,0 +1,20 @@
+package cn.code.nl.module.base.service.codegen.dto;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 固定前缀段配置
+ *
+ * @author zhouz
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class PrefixSegment extends SegmentConfig {
+
+    /**
+     * 固定前缀值，如 "ORD"
+     */
+    private String value;
+
+}
diff --git a/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SegmentConfig.java b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SegmentConfig.java
new file mode 100644
index 00000000..495bbf56
--- /dev/null
+++ b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SegmentConfig.java
@@ -0,0 +1,26 @@
+package cn.code.nl.module.base.service.codegen.dto;
+
+import com.fasterxml.jackson.annotation.JsonSubTypes;
+import com.fasterxml.jackson.annotation.JsonTypeInfo;
+import lombok.Data;
+
+/**
+ * 分段配置基类，使用 Jackson 多态序列化/反序列化
+ *
+ * @author zhouz
+ */
+@Data
+@JsonTypeInfo(use = JsonTypeInfo.Id.NAME, property = "type")
+@JsonSubTypes({
+    @JsonSubTypes.Type(value = PrefixSegment.class, name = "PREFIX"),
+    @JsonSubTypes.Type(value = DateSegment.class, name = "DATE"),
+    @JsonSubTypes.Type(value = SequenceSegment.class, name = "SEQUENCE")
+})
+public abstract class SegmentConfig {
+
+    /**
+     * 段类型：PREFIX / DATE / SEQUENCE
+     */
+    private String type;
+
+}
diff --git a/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SequenceSegment.java b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SequenceSegment.java
new file mode 100644
index 00000000..0b0d6057
--- /dev/null
+++ b/nl-module-base/nl-module-base-server/src/main/java/cn/code/nl/module/base/service/codegen/dto/SequenceSegment.java
@@ -0,0 +1,40 @@
+package cn.code.nl.module.base.service.codegen.dto;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 流水序号段配置
+ *
+ * @author zhouz
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class SequenceSegment extends SegmentConfig {
+
+    /**
+     * 重置维度：DAY / MONTH / YEAR / GLOBAL
+     */
+    private String resetBy;
+
+    /**
+     * 起始值，默认 1
+     */
+    private Long startAt;
+
+    /**
+     * 补位后的总长度，如 4 → 0001
+     */
+    private Integer paddingLen;
+
+    /**
+     * 补位字符，默认 "0"
+     */
+    private String paddingChar;
+
+    /**
+     * 序号最大值上限
+     */
+    private Long maxValue;
+
+}