diff --git a/platform/backend/app/models.py b/platform/backend/app/models.py
index 2f071c9..d353372 100644
--- a/platform/backend/app/models.py
+++ b/platform/backend/app/models.py
@@ -946,4 +946,209 @@ class GeoReadinessScore(Base):
             "readability_score": self.readability_score,
             "heading_structure_score": self.heading_structure_score,
             "checked_at": self.checked_at.isoformat() if self.checked_at else None,
+        }
+
+
+class ExternalProduct(Base):
+    """外部推广产品"""
+    __tablename__ = "external_products"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    name = Column(String, nullable=False, comment="产品名称")
+    type = Column(String, nullable=False, comment="类型: website/article/wechat_account/miniprogram")
+    url = Column(String, nullable=True, comment="主URL")
+    domain = Column(String, nullable=True, comment="域名")
+    app_id = Column(String, nullable=True, comment="小程序AppID")
+    account_id = Column(String, nullable=True, comment="公众号ID")
+    description = Column(Text, nullable=True, comment="产品描述")
+    org_id = Column(String, default="default", nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "type": self.type,
+            "url": self.url,
+            "domain": self.domain,
+            "app_id": self.app_id,
+            "account_id": self.account_id,
+            "description": self.description,
+            "org_id": self.org_id,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+class PromotionCampaign(Base):
+    """推广活动"""
+    __tablename__ = "promotion_campaigns"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    name = Column(String, nullable=False, comment="活动名称")
+    product_id = Column(Integer, ForeignKey("external_products.id"), nullable=False)
+    status = Column(String, default="active", comment="状态: active/paused/completed")
+    keywords = Column(JSON, default=list, comment="目标关键词列表")
+    target_engines = Column(JSON, default=list, comment="目标搜索引擎列表")
+    notes = Column(Text, nullable=True, comment="备注")
+    org_id = Column(String, default="default", nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    product = relationship("ExternalProduct", backref="campaigns")
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "name": self.name,
+            "product_id": self.product_id,
+            "status": self.status,
+            "keywords": self.keywords or [],
+            "target_engines": self.target_engines or [],
+            "notes": self.notes,
+            "org_id": self.org_id,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+class CampaignKeyword(Base):
+    """推广关键词"""
+    __tablename__ = "campaign_keywords"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    campaign_id = Column(Integer, ForeignKey("promotion_campaigns.id"), nullable=False)
+    keyword = Column(String, nullable=False, comment="关键词")
+    search_volume = Column(Integer, nullable=True, comment="搜索量")
+    difficulty = Column(Float, nullable=True, comment="竞争难度 0-1")
+    current_rank = Column(Integer, nullable=True, comment="当前排名")
+    target_rank = Column(Integer, nullable=True, comment="目标排名")
+    best_rank = Column(Integer, nullable=True, comment="历史最佳排名")
+    last_checked = Column(DateTime(timezone=True), nullable=True, comment="最后检查时间")
+    org_id = Column(String, default="default", nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    campaign = relationship("PromotionCampaign", backref="campaign_keywords")
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "campaign_id": self.campaign_id,
+            "keyword": self.keyword,
+            "search_volume": self.search_volume,
+            "difficulty": self.difficulty,
+            "current_rank": self.current_rank,
+            "target_rank": self.target_rank,
+            "best_rank": self.best_rank,
+            "last_checked": self.last_checked.isoformat() if self.last_checked else None,
+            "org_id": self.org_id,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
+        }
+
+
+class SEOAudit(Base):
+    """SEO审计报告"""
+    __tablename__ = "seo_audits"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    product_id = Column(Integer, ForeignKey("external_products.id"), nullable=False)
+    audit_type = Column(String, default="full", comment="审计类型: full/quick")
+    overall_score = Column(Float, nullable=True, comment="总分 0-100")
+    meta_score = Column(Float, nullable=True, comment="Meta标签评分")
+    heading_score = Column(Float, nullable=True, comment="标题结构评分")
+    content_score = Column(Float, nullable=True, comment="内容评分")
+    perf_score = Column(Float, nullable=True, comment="性能评分")
+    links_score = Column(Float, nullable=True, comment="链接评分")
+    mobile_score = Column(Float, nullable=True, comment="移动端评分")
+    raw_data = Column(JSON, default=dict, comment="审计详情JSON")
+    page_count = Column(Integer, nullable=True, comment="审计页面数")
+    issues_found = Column(Integer, nullable=True, comment="发现问题数")
+    org_id = Column(String, default="default", nullable=True)
+    checked_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    product = relationship("ExternalProduct", backref="audits")
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "product_id": self.product_id,
+            "audit_type": self.audit_type,
+            "overall_score": self.overall_score,
+            "meta_score": self.meta_score,
+            "heading_score": self.heading_score,
+            "content_score": self.content_score,
+            "perf_score": self.perf_score,
+            "links_score": self.links_score,
+            "mobile_score": self.mobile_score,
+            "page_count": self.page_count,
+            "issues_found": self.issues_found,
+            "org_id": self.org_id,
+            "checked_at": self.checked_at.isoformat() if self.checked_at else None,
+        }
+
+
+class KeywordRanking(Base):
+    """外部关键词多引擎排名"""
+    __tablename__ = "keyword_rankings"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    campaign_id = Column(Integer, ForeignKey("promotion_campaigns.id"), nullable=True)
+    keyword_id = Column(Integer, ForeignKey("campaign_keywords.id"), nullable=True)
+    product_id = Column(Integer, ForeignKey("external_products.id"), nullable=True)
+    keyword = Column(String, nullable=False, comment="关键词")
+    search_engine = Column(String, nullable=False, comment="搜索引擎: baidu/360/sogou/wechat/bing/google")
+    rank = Column(Integer, nullable=True, comment="排名位置")
+    url_found = Column(String, nullable=True, comment="排名URL")
+    org_id = Column(String, default="default", nullable=True)
+    checked_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "campaign_id": self.campaign_id,
+            "keyword_id": self.keyword_id,
+            "product_id": self.product_id,
+            "keyword": self.keyword,
+            "search_engine": self.search_engine,
+            "rank": self.rank,
+            "url_found": self.url_found,
+            "org_id": self.org_id,
+            "checked_at": self.checked_at.isoformat() if self.checked_at else None,
+        }
+
+
+class OptimizationTask(Base):
+    """优化建议任务"""
+    __tablename__ = "optimization_tasks"
+
+    id = Column(Integer, primary_key=True, index=True, autoincrement=True)
+    audit_id = Column(Integer, ForeignKey("seo_audits.id"), nullable=False)
+    product_id = Column(Integer, ForeignKey("external_products.id"), nullable=False)
+    category = Column(String, nullable=False, comment="分类: meta/heading/content/performance/links/mobile/other")
+    severity = Column(String, default="medium", comment="严重度: high/medium/low")
+    issue = Column(Text, nullable=False, comment="问题描述")
+    recommendation = Column(Text, nullable=True, comment="优化建议")
+    status = Column(String, default="open", comment="状态: open/resolved/ignored")
+    org_id = Column(String, default="default", nullable=True)
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())
+
+    audit = relationship("SEOAudit", backref="optimization_tasks")
+
+    def to_dict(self):
+        return {
+            "id": self.id,
+            "audit_id": self.audit_id,
+            "product_id": self.product_id,
+            "category": self.category,
+            "severity": self.severity,
+            "issue": self.issue,
+            "recommendation": self.recommendation,
+            "status": self.status,
+            "org_id": self.org_id,
+            "created_at": self.created_at.isoformat() if self.created_at else None,
+            "updated_at": self.updated_at.isoformat() if self.updated_at else None,
         }
\ No newline at end of file
diff --git a/platform/backend/app/schemas.py b/platform/backend/app/schemas.py
index 5b5f2d2..5c7a403 100644
--- a/platform/backend/app/schemas.py
+++ b/platform/backend/app/schemas.py
@@ -636,3 +636,163 @@ class MenuResponse(MenuBase):
     model_config = ConfigDict(from_attributes=True)
 
 
+# ========== 外部推广模块 ==========
+
+class ExternalProductBase(BaseModel):
+    name: str
+    type: str = "website"
+    url: Optional[str] = None
+    domain: Optional[str] = None
+    app_id: Optional[str] = None
+    account_id: Optional[str] = None
+    description: Optional[str] = None
+
+
+class ExternalProductCreate(ExternalProductBase):
+    pass
+
+
+class ExternalProductUpdate(BaseModel):
+    name: Optional[str] = None
+    type: Optional[str] = None
+    url: Optional[str] = None
+    domain: Optional[str] = None
+    app_id: Optional[str] = None
+    account_id: Optional[str] = None
+    description: Optional[str] = None
+
+
+class ExternalProductResponse(ExternalProductBase):
+    id: int
+    org_id: Optional[str] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class PromotionCampaignBase(BaseModel):
+    name: str
+    product_id: int
+    status: str = "active"
+    keywords: List[str] = []
+    target_engines: List[str] = []
+    notes: Optional[str] = None
+
+
+class PromotionCampaignCreate(PromotionCampaignBase):
+    pass
+
+
+class PromotionCampaignUpdate(BaseModel):
+    name: Optional[str] = None
+    status: Optional[str] = None
+    keywords: Optional[List[str]] = None
+    target_engines: Optional[List[str]] = None
+    notes: Optional[str] = None
+
+
+class PromotionCampaignResponse(PromotionCampaignBase):
+    id: int
+    org_id: Optional[str] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class CampaignKeywordBase(BaseModel):
+    campaign_id: int
+    keyword: str
+    search_volume: Optional[int] = None
+    difficulty: Optional[float] = None
+    current_rank: Optional[int] = None
+    target_rank: Optional[int] = None
+
+
+class CampaignKeywordCreate(CampaignKeywordBase):
+    pass
+
+
+class CampaignKeywordUpdate(BaseModel):
+    search_volume: Optional[int] = None
+    difficulty: Optional[float] = None
+    current_rank: Optional[int] = None
+    target_rank: Optional[int] = None
+
+
+class CampaignKeywordResponse(CampaignKeywordBase):
+    id: int
+    best_rank: Optional[int] = None
+    last_checked: Optional[datetime] = None
+    org_id: Optional[str] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class SEOAuditResponse(BaseModel):
+    id: int
+    product_id: int
+    audit_type: str
+    overall_score: Optional[float] = None
+    meta_score: Optional[float] = None
+    heading_score: Optional[float] = None
+    content_score: Optional[float] = None
+    perf_score: Optional[float] = None
+    links_score: Optional[float] = None
+    mobile_score: Optional[float] = None
+    page_count: Optional[int] = None
+    issues_found: Optional[int] = None
+    org_id: Optional[str] = None
+    checked_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class KeywordRankingResponse(BaseModel):
+    id: int
+    campaign_id: Optional[int] = None
+    keyword_id: Optional[int] = None
+    product_id: Optional[int] = None
+    keyword: str
+    search_engine: str
+    rank: Optional[int] = None
+    url_found: Optional[str] = None
+    org_id: Optional[str] = None
+    checked_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+
+class OptimizationTaskBase(BaseModel):
+    category: str
+    severity: str = "medium"
+    issue: str
+    recommendation: Optional[str] = None
+
+
+class OptimizationTaskCreate(OptimizationTaskBase):
+    audit_id: int
+    product_id: int
+
+
+class OptimizationTaskUpdate(BaseModel):
+    status: Optional[str] = None
+    severity: Optional[str] = None
+    recommendation: Optional[str] = None
+
+
+class OptimizationTaskResponse(OptimizationTaskBase):
+    id: int
+    audit_id: int
+    product_id: int
+    status: str
+    org_id: Optional[str] = None
+    created_at: Optional[datetime] = None
+    updated_at: Optional[datetime] = None
+
+    model_config = ConfigDict(from_attributes=True)
+
+