diff --git a/crates/erp-health/src/dto/banner_dto.rs b/crates/erp-health/src/dto/banner_dto.rs
new file mode 100644
index 0000000..f1620ec
--- /dev/null
+++ b/crates/erp-health/src/dto/banner_dto.rs
@@ -0,0 +1,113 @@
+use serde::{Deserialize, Serialize};
+use utoipa::ToSchema;
+use uuid::Uuid;
+
+use erp_core::sanitize::{sanitize_option, sanitize_string};
+
+// ---------------------------------------------------------------------------
+// 轮播图 DTOs
+// ---------------------------------------------------------------------------
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct BannerResp {
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub media_item_id: Uuid,
+    pub title: Option<String>,
+    pub subtitle: Option<String>,
+    pub link_type: Option<String>,
+    pub link_target: Option<String>,
+    pub sort_order: i32,
+    pub status: String,
+    pub start_time: Option<chrono::DateTime<chrono::Utc>>,
+    pub end_time: Option<chrono::DateTime<chrono::Utc>>,
+    /// 媒体文件访问 URL
+    pub image_url: Option<String>,
+    /// 缩略图 URL
+    pub thumbnail_url: Option<String>,
+    /// 关联的媒体文件是否已被删除
+    pub media_deleted: bool,
+    pub created_at: chrono::DateTime<chrono::Utc>,
+    pub updated_at: chrono::DateTime<chrono::Utc>,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub version: i32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct CreateBannerReq {
+    pub media_item_id: Uuid,
+    pub title: Option<String>,
+    pub subtitle: Option<String>,
+    pub link_type: Option<String>,
+    pub link_target: Option<String>,
+    #[serde(default)]
+    pub sort_order: i32,
+    #[serde(default = "default_active")]
+    pub status: String,
+    pub start_time: Option<chrono::DateTime<chrono::Utc>>,
+    pub end_time: Option<chrono::DateTime<chrono::Utc>>,
+}
+
+fn default_active() -> String {
+    "active".to_string()
+}
+
+impl CreateBannerReq {
+    pub fn sanitize(&mut self) {
+        self.title = sanitize_option(self.title.take());
+        self.subtitle = sanitize_option(self.subtitle.take());
+        if let Some(ref mut v) = self.link_type {
+            *v = sanitize_string(v);
+        }
+        self.link_target = sanitize_option(self.link_target.take());
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct UpdateBannerReq {
+    pub media_item_id: Option<Uuid>,
+    pub title: Option<String>,
+    pub subtitle: Option<String>,
+    pub link_type: Option<String>,
+    pub link_target: Option<String>,
+    pub sort_order: Option<i32>,
+    pub status: Option<String>,
+    pub start_time: Option<chrono::DateTime<chrono::Utc>>,
+    pub end_time: Option<chrono::DateTime<chrono::Utc>>,
+    pub version: i32,
+}
+
+impl UpdateBannerReq {
+    pub fn sanitize(&mut self) {
+        self.title = sanitize_option(self.title.take());
+        self.subtitle = sanitize_option(self.subtitle.take());
+        if let Some(ref mut v) = self.link_type {
+            *v = sanitize_string(v);
+        }
+        self.link_target = sanitize_option(self.link_target.take());
+    }
+}
+
+/// 轮播图排序请求
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct SortBannerReq {
+    pub items: Vec<SortItem>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct SortItem {
+    pub id: Uuid,
+    pub sort_order: i32,
+}
+
+/// 小程序端公开轮播图（精简字段）
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct PublicBannerResp {
+    pub id: Uuid,
+    pub title: Option<String>,
+    pub subtitle: Option<String>,
+    pub image_url: Option<String>,
+    pub link_type: Option<String>,
+    pub link_target: Option<String>,
+}
diff --git a/crates/erp-health/src/dto/media_dto.rs b/crates/erp-health/src/dto/media_dto.rs
new file mode 100644
index 0000000..f9720a6
--- /dev/null
+++ b/crates/erp-health/src/dto/media_dto.rs
@@ -0,0 +1,132 @@
+use serde::{Deserialize, Serialize};
+use utoipa::{IntoParams, ToSchema};
+use uuid::Uuid;
+
+use erp_core::sanitize::{sanitize_option, sanitize_string};
+
+// ---------------------------------------------------------------------------
+// 媒体文件 DTOs
+// ---------------------------------------------------------------------------
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct MediaItemResp {
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub folder_id: Option<Uuid>,
+    pub filename: String,
+    pub storage_path: String,
+    pub thumbnail_path: Option<String>,
+    pub content_type: String,
+    pub file_size: i64,
+    pub width: Option<i32>,
+    pub height: Option<i32>,
+    pub alt_text: Option<String>,
+    pub is_public: bool,
+    pub created_at: chrono::DateTime<chrono::Utc>,
+    pub updated_at: chrono::DateTime<chrono::Utc>,
+    pub created_by: Option<Uuid>,
+    pub updated_by: Option<Uuid>,
+    pub version: i32,
+}
+
+#[derive(Debug, Clone, Deserialize, IntoParams)]
+pub struct MediaListParams {
+    pub page: Option<u64>,
+    pub page_size: Option<u64>,
+    pub folder_id: Option<Uuid>,
+    /// 按内容类型筛选（如 image/png）
+    pub content_type: Option<String>,
+    /// 仅公开资源
+    pub is_public: Option<bool>,
+    /// 关键词搜索（文件名模糊匹配）
+    pub keyword: Option<String>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct UpdateMediaItemReq {
+    pub filename: Option<String>,
+    pub alt_text: Option<String>,
+    pub is_public: Option<bool>,
+    pub folder_id: Option<Uuid>,
+    pub version: i32,
+}
+
+impl UpdateMediaItemReq {
+    pub fn sanitize(&mut self) {
+        if let Some(ref mut v) = self.filename {
+            *v = sanitize_string(v);
+        }
+        self.alt_text = sanitize_option(self.alt_text.take());
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct MoveMediaReq {
+    /// 目标文件夹 ID（None 表示移到根目录）
+    pub folder_id: Option<Uuid>,
+    pub version: i32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct BatchDeleteReq {
+    pub ids: Vec<Uuid>,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct CropReq {
+    pub x: u32,
+    pub y: u32,
+    pub width: u32,
+    pub height: u32,
+    pub version: i32,
+}
+
+// ---------------------------------------------------------------------------
+// 文件夹 DTOs
+// ---------------------------------------------------------------------------
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct FolderResp {
+    pub id: Uuid,
+    pub tenant_id: Uuid,
+    pub name: String,
+    pub parent_id: Option<Uuid>,
+    pub sort_order: i32,
+    /// 子文件夹
+    pub children: Vec<FolderResp>,
+    /// 文件夹内文件数量
+    pub item_count: i64,
+    pub created_at: chrono::DateTime<chrono::Utc>,
+    pub updated_at: chrono::DateTime<chrono::Utc>,
+    pub version: i32,
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct CreateFolderReq {
+    pub name: String,
+    pub parent_id: Option<Uuid>,
+    #[serde(default)]
+    pub sort_order: i32,
+}
+
+impl CreateFolderReq {
+    pub fn sanitize(&mut self) {
+        self.name = sanitize_string(&self.name);
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
+pub struct UpdateFolderReq {
+    pub name: Option<String>,
+    pub parent_id: Option<Uuid>,
+    pub sort_order: Option<i32>,
+    pub version: i32,
+}
+
+impl UpdateFolderReq {
+    pub fn sanitize(&mut self) {
+        if let Some(ref mut v) = self.name {
+            *v = sanitize_string(v);
+        }
+    }
+}
diff --git a/crates/erp-health/src/dto/mod.rs b/crates/erp-health/src/dto/mod.rs
index c6f94be..070395d 100644
--- a/crates/erp-health/src/dto/mod.rs
+++ b/crates/erp-health/src/dto/mod.rs
@@ -1,6 +1,7 @@
 pub mod alert_dto;
 pub mod appointment_dto;
 pub mod article_dto;
+pub mod banner_dto;
 pub mod ble_gateway_dto;
 pub mod care_plan_dto;
 pub mod consent_dto;
@@ -11,6 +12,7 @@ pub mod doctor_dto;
 pub mod follow_up_dto;
 pub mod follow_up_template_dto;
 pub mod health_data_dto;
+pub mod media_dto;
 pub mod medication_record_dto;
 pub mod medication_reminder_dto;
 pub mod patient_dto;
diff --git a/crates/erp-health/src/service/media_service.rs b/crates/erp-health/src/service/media_service.rs
new file mode 100644
index 0000000..4768fc7
--- /dev/null
+++ b/crates/erp-health/src/service/media_service.rs
@@ -0,0 +1,781 @@
+//! 媒体库 Service — 文件上传/CRUD + 缩略图/裁剪 + 文件夹管理
+
+use chrono::Utc;
+use sea_orm::entity::prelude::*;
+use sea_orm::{ActiveValue::Set, QueryOrder, QuerySelect};
+use std::path::{Path, PathBuf};
+use uuid::Uuid;
+
+use erp_core::audit::AuditLog;
+use erp_core::audit_service;
+use erp_core::error::check_version;
+use erp_core::types::PaginatedResponse;
+
+use crate::dto::media_dto::*;
+use crate::entity::{banner, media_folder, media_item};
+use crate::error::{HealthError, HealthResult};
+use crate::state::HealthState;
+
+// ---------------------------------------------------------------------------
+// 媒体文件查询
+// ---------------------------------------------------------------------------
+
+/// 分页查询媒体文件，支持按文件夹/类型/关键词/公开状态筛选
+pub async fn list_media_items(
+    state: &HealthState,
+    tenant_id: Uuid,
+    params: MediaListParams,
+) -> HealthResult<PaginatedResponse<MediaItemResp>> {
+    let page = params.page.unwrap_or(1).max(1);
+    let limit = params.page_size.unwrap_or(20).min(100);
+    let offset = page.saturating_sub(1) * limit;
+
+    let mut query = media_item::Entity::find()
+        .filter(media_item::Column::TenantId.eq(tenant_id))
+        .filter(media_item::Column::DeletedAt.is_null());
+
+    if let Some(fid) = params.folder_id {
+        query = query.filter(media_item::Column::FolderId.eq(fid));
+    }
+    if let Some(ref ct) = params.content_type {
+        query = query.filter(media_item::Column::ContentType.contains(ct));
+    }
+    if let Some(pub_flag) = params.is_public {
+        query = query.filter(media_item::Column::IsPublic.eq(pub_flag));
+    }
+    if let Some(ref kw) = params.keyword {
+        query = query.filter(media_item::Column::Filename.contains(kw));
+    }
+
+    let total = query.clone().count(&state.db).await?;
+
+    let models = query
+        .order_by_desc(media_item::Column::CreatedAt)
+        .offset(offset)
+        .limit(limit)
+        .all(&state.db)
+        .await?;
+
+    let total_pages = total.div_ceil(limit.max(1));
+    let data: Vec<MediaItemResp> = models.into_iter().map(model_to_resp).collect();
+
+    Ok(PaginatedResponse {
+        data,
+        total,
+        page,
+        page_size: limit,
+        total_pages,
+    })
+}
+
+/// 获取单个媒体文件详情
+pub async fn get_media_item(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+) -> HealthResult<MediaItemResp> {
+    let model = find_media_item(state, tenant_id, id).await?;
+    Ok(model_to_resp(model))
+}
+
+// ---------------------------------------------------------------------------
+// 文件上传
+// ---------------------------------------------------------------------------
+
+/// 上传媒体文件：保存到磁盘 → 生成缩略图 → 创建 DB 记录
+#[allow(clippy::too_many_arguments)]
+pub async fn upload_media(
+    state: &HealthState,
+    tenant_id: Uuid,
+    operator_id: Option<Uuid>,
+    file_data: &[u8],
+    filename: &str,
+    content_type: &str,
+    folder_id: Option<Uuid>,
+    is_public: bool,
+    upload_dir: &str,
+) -> HealthResult<MediaItemResp> {
+    let id = Uuid::now_v7();
+    let now = Utc::now();
+
+    // 构造存储路径: {upload_dir}/{tenant_id}/{uuid}.ext
+    let ext = Path::new(filename)
+        .extension()
+        .and_then(|e| e.to_str())
+        .unwrap_or("bin");
+    let relative_path = format!(
+        "{}/{}/{}.{}",
+        upload_dir.trim_end_matches('/'),
+        tenant_id,
+        id,
+        ext
+    );
+    let storage_path = PathBuf::from(&relative_path);
+
+    // 确保目录存在
+    if let Some(parent) = storage_path.parent() {
+        tokio::fs::create_dir_all(parent)
+            .await
+            .map_err(|e| HealthError::Validation(format!("创建上传目录失败: {}", e)))?;
+    }
+
+    // 写入文件
+    tokio::fs::write(&storage_path, file_data)
+        .await
+        .map_err(|e| HealthError::Validation(format!("文件写入失败: {}", e)))?;
+
+    // 读取图片尺寸
+    let (width, height) = read_image_dimensions(&storage_path);
+
+    // 生成缩略图
+    let thumbnail_path = generate_thumbnail_path(&storage_path);
+    if let Some(thumb_dst) = &thumbnail_path {
+        if let Err(e) = std::fs::create_dir_all(thumb_dst.parent().unwrap_or(Path::new("."))) {
+            tracing::warn!("创建缩略图目录失败: {}", e);
+        }
+        if let Err(e) = generate_thumbnail(&storage_path, thumb_dst, 200) {
+            tracing::warn!("生成缩略图失败 (非致命): {}", e);
+        }
+    }
+
+    let model = media_item::ActiveModel {
+        id: Set(id),
+        tenant_id: Set(tenant_id),
+        folder_id: Set(folder_id),
+        filename: Set(filename.to_string()),
+        storage_path: Set(relative_path.clone()),
+        thumbnail_path: Set(thumbnail_path.map(|p| p.to_string_lossy().to_string())),
+        content_type: Set(content_type.to_string()),
+        file_size: Set(file_data.len() as i64),
+        width: Set(width),
+        height: Set(height),
+        alt_text: Set(None),
+        is_public: Set(is_public),
+        created_at: Set(now),
+        updated_at: Set(now),
+        created_by: Set(operator_id),
+        updated_by: Set(operator_id),
+        deleted_at: Set(None),
+        version: Set(1),
+    };
+    let m = model.insert(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(tenant_id, operator_id, "media_item.created", "media_item")
+            .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(model_to_resp(m))
+}
+
+// ---------------------------------------------------------------------------
+// 媒体文件修改
+// ---------------------------------------------------------------------------
+
+/// 更新媒体文件元数据（文件名/alt/公开状态/文件夹），带乐观锁
+pub async fn update_media_item(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    req: UpdateMediaItemReq,
+) -> HealthResult<MediaItemResp> {
+    let model = find_media_item(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(req.version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    let mut active: media_item::ActiveModel = model.into();
+    if let Some(v) = req.filename {
+        active.filename = Set(v);
+    }
+    if let Some(v) = req.alt_text {
+        active.alt_text = Set(Some(v));
+    }
+    if let Some(v) = req.is_public {
+        active.is_public = Set(v);
+    }
+    if let Some(v) = req.folder_id {
+        active.folder_id = Set(Some(v));
+    }
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+
+    let m = active.update(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(tenant_id, operator_id, "media_item.updated", "media_item")
+            .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(model_to_resp(m))
+}
+
+/// 软删除媒体文件：标记 deleted_at + 级联停用关联 banner + 删除磁盘文件
+pub async fn delete_media_item(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    version: i32,
+) -> HealthResult<()> {
+    let model = find_media_item(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    // 软删除
+    let mut active: media_item::ActiveModel = model.clone().into();
+    active.deleted_at = Set(Some(Utc::now()));
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+    active.update(&state.db).await?;
+
+    // 级联：关联的 banner 全部设为 inactive
+    banner::Entity::update_many()
+        .col_expr(banner::Column::Status, Expr::value("inactive"))
+        .filter(banner::Column::MediaItemId.eq(id))
+        .filter(banner::Column::TenantId.eq(tenant_id))
+        .exec(&state.db)
+        .await?;
+
+    // 删除磁盘文件（忽略文件不存在的错误）
+    let storage = PathBuf::from(&model.storage_path);
+    if storage.exists() {
+        let _ = tokio::fs::remove_file(&storage).await;
+    }
+    if let Some(ref thumb) = model.thumbnail_path {
+        let thumb_path = PathBuf::from(thumb);
+        if thumb_path.exists() {
+            let _ = tokio::fs::remove_file(&thumb_path).await;
+        }
+    }
+
+    audit_service::record(
+        AuditLog::new(tenant_id, operator_id, "media_item.deleted", "media_item")
+            .with_resource_id(id),
+        &state.db,
+    )
+    .await;
+
+    Ok(())
+}
+
+/// 批量软删除媒体文件
+pub async fn batch_delete(
+    state: &HealthState,
+    tenant_id: Uuid,
+    operator_id: Option<Uuid>,
+    req: BatchDeleteReq,
+) -> HealthResult<()> {
+    if req.ids.is_empty() {
+        return Ok(());
+    }
+
+    let now = Utc::now();
+
+    media_item::Entity::update_many()
+        .col_expr(media_item::Column::DeletedAt, Expr::value(Some(now)))
+        .col_expr(media_item::Column::UpdatedAt, Expr::value(now))
+        .col_expr(media_item::Column::UpdatedBy, Expr::value(operator_id))
+        .filter(media_item::Column::Id.is_in(req.ids.clone()))
+        .filter(media_item::Column::TenantId.eq(tenant_id))
+        .filter(media_item::Column::DeletedAt.is_null())
+        .exec(&state.db)
+        .await?;
+
+    // 级联：停用关联 banner
+    banner::Entity::update_many()
+        .col_expr(banner::Column::Status, Expr::value("inactive"))
+        .filter(banner::Column::MediaItemId.is_in(req.ids.clone()))
+        .filter(banner::Column::TenantId.eq(tenant_id))
+        .exec(&state.db)
+        .await?;
+
+    audit_service::record(
+        AuditLog::new(
+            tenant_id,
+            operator_id,
+            "media_item.batch_deleted",
+            "media_item",
+        ),
+        &state.db,
+    )
+    .await;
+
+    Ok(())
+}
+
+/// 移动媒体文件到指定文件夹（None 表示根目录）
+pub async fn move_media(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    req: MoveMediaReq,
+) -> HealthResult<MediaItemResp> {
+    let model = find_media_item(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(req.version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    let mut active: media_item::ActiveModel = model.into();
+    active.folder_id = Set(req.folder_id);
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+    let m = active.update(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(tenant_id, operator_id, "media_item.moved", "media_item")
+            .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(model_to_resp(m))
+}
+
+/// 裁剪图片并重新生成缩略图
+pub async fn crop_media(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    req: CropReq,
+) -> HealthResult<MediaItemResp> {
+    let model = find_media_item(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(req.version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    // 裁剪图片
+    let src_path = PathBuf::from(&model.storage_path);
+    let cropped_id = Uuid::now_v7();
+    let ext = src_path
+        .extension()
+        .and_then(|e| e.to_str())
+        .unwrap_or("png");
+    let cropped_relative = format!("uploads/{}/{}.{}", tenant_id, cropped_id, ext);
+    let cropped_path = PathBuf::from(&cropped_relative);
+
+    if let Some(parent) = cropped_path.parent() {
+        tokio::fs::create_dir_all(parent)
+            .await
+            .map_err(|e| HealthError::Validation(format!("创建目录失败: {}", e)))?;
+    }
+
+    crop_image(
+        &src_path,
+        &cropped_path,
+        req.x,
+        req.y,
+        req.width,
+        req.height,
+    )?;
+
+    // 更新尺寸
+    let (new_width, new_height) = read_image_dimensions(&cropped_path);
+
+    // 重新生成缩略图
+    let thumbnail_path = generate_thumbnail_path(&cropped_path);
+    if let Some(thumb_dst) = &thumbnail_path {
+        if let Err(e) = std::fs::create_dir_all(thumb_dst.parent().unwrap_or(Path::new("."))) {
+            tracing::warn!("创建缩略图目录失败: {}", e);
+        }
+        if let Err(e) = generate_thumbnail(&cropped_path, thumb_dst, 200) {
+            tracing::warn!("生成缩略图失败 (非致命): {}", e);
+        }
+    }
+
+    let mut active: media_item::ActiveModel = model.into();
+    active.storage_path = Set(cropped_relative);
+    active.thumbnail_path = Set(thumbnail_path.map(|p| p.to_string_lossy().to_string()));
+    active.width = Set(new_width);
+    active.height = Set(new_height);
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+    let m = active.update(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(tenant_id, operator_id, "media_item.cropped", "media_item")
+            .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(model_to_resp(m))
+}
+
+// ---------------------------------------------------------------------------
+// 图片处理工具函数（同步）
+// ---------------------------------------------------------------------------
+
+/// 中心裁剪 + 缩放生成缩略图
+pub fn generate_thumbnail(src: &Path, dst: &Path, size: u32) -> HealthResult<()> {
+    let mut img = image::open(src).map_err(|e| HealthError::Validation(e.to_string()))?;
+    let (w, h) = (img.width(), img.height());
+    let crop_size = w.min(h);
+    let x = (w - crop_size) / 2;
+    let y = (h - crop_size) / 2;
+    let thumb = img.crop(x, y, crop_size, crop_size).resize_exact(
+        size,
+        size,
+        image::imageops::FilterType::Lanczos3,
+    );
+    thumb
+        .save(dst)
+        .map_err(|e| HealthError::Validation(e.to_string()))?;
+    Ok(())
+}
+
+/// 按指定区域裁剪图片
+pub fn crop_image(src: &Path, dst: &Path, x: u32, y: u32, w: u32, h: u32) -> HealthResult<()> {
+    let mut img = image::open(src).map_err(|e| HealthError::Validation(e.to_string()))?;
+    let cropped = img.crop(x, y, w, h);
+    cropped
+        .save(dst)
+        .map_err(|e| HealthError::Validation(e.to_string()))?;
+    Ok(())
+}
+
+// ---------------------------------------------------------------------------
+// 文件夹管理
+// ---------------------------------------------------------------------------
+
+/// 获取文件夹树形结构（含每个文件夹的文件数量）
+pub async fn list_folders(state: &HealthState, tenant_id: Uuid) -> HealthResult<Vec<FolderResp>> {
+    // 查询所有未删除文件夹
+    let folders = media_folder::Entity::find()
+        .filter(media_folder::Column::TenantId.eq(tenant_id))
+        .filter(media_folder::Column::DeletedAt.is_null())
+        .order_by_asc(media_folder::Column::SortOrder)
+        .order_by_asc(media_folder::Column::CreatedAt)
+        .all(&state.db)
+        .await?;
+
+    // 统计每个文件夹的文件数
+    let folder_ids: Vec<Uuid> = folders.iter().map(|f| f.id).collect();
+    let mut count_map: std::collections::HashMap<Uuid, i64> = std::collections::HashMap::new();
+
+    if !folder_ids.is_empty() {
+        // 逐文件夹计数（SeaORM 没有 GROUP BY count 的便捷方法，用子查询方式）
+        for fid in &folder_ids {
+            let count = media_item::Entity::find()
+                .filter(media_item::Column::TenantId.eq(tenant_id))
+                .filter(media_item::Column::FolderId.eq(*fid))
+                .filter(media_item::Column::DeletedAt.is_null())
+                .count(&state.db)
+                .await?;
+            count_map.insert(*fid, count as i64);
+        }
+    }
+
+    // 构建扁平列表
+    let flat: Vec<FolderResp> = folders
+        .into_iter()
+        .map(|f| FolderResp {
+            id: f.id,
+            tenant_id: f.tenant_id,
+            name: f.name,
+            parent_id: f.parent_id,
+            sort_order: f.sort_order,
+            children: vec![],
+            item_count: count_map.get(&f.id).copied().unwrap_or(0),
+            created_at: f.created_at,
+            updated_at: f.updated_at,
+            version: f.version,
+        })
+        .collect();
+
+    // 组装树形结构
+    Ok(build_folder_tree(flat))
+}
+
+/// 创建文件夹
+pub async fn create_folder(
+    state: &HealthState,
+    tenant_id: Uuid,
+    operator_id: Option<Uuid>,
+    req: CreateFolderReq,
+) -> HealthResult<FolderResp> {
+    let id = Uuid::now_v7();
+    let now = Utc::now();
+
+    let model = media_folder::ActiveModel {
+        id: Set(id),
+        tenant_id: Set(tenant_id),
+        name: Set(req.name),
+        parent_id: Set(req.parent_id),
+        sort_order: Set(req.sort_order),
+        created_at: Set(now),
+        updated_at: Set(now),
+        created_by: Set(operator_id),
+        updated_by: Set(operator_id),
+        deleted_at: Set(None),
+        version: Set(1),
+    };
+    let m = model.insert(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(
+            tenant_id,
+            operator_id,
+            "media_folder.created",
+            "media_folder",
+        )
+        .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(FolderResp {
+        id: m.id,
+        tenant_id: m.tenant_id,
+        name: m.name,
+        parent_id: m.parent_id,
+        sort_order: m.sort_order,
+        children: vec![],
+        item_count: 0,
+        created_at: m.created_at,
+        updated_at: m.updated_at,
+        version: m.version,
+    })
+}
+
+/// 更新文件夹信息（名称/父级/排序），带乐观锁
+pub async fn update_folder(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    req: UpdateFolderReq,
+) -> HealthResult<FolderResp> {
+    let model = find_media_folder(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(req.version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    let mut active: media_folder::ActiveModel = model.into();
+    if let Some(v) = req.name {
+        active.name = Set(v);
+    }
+    if let Some(v) = req.parent_id {
+        active.parent_id = Set(Some(v));
+    }
+    if let Some(v) = req.sort_order {
+        active.sort_order = Set(v);
+    }
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+    let m = active.update(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(
+            tenant_id,
+            operator_id,
+            "media_folder.updated",
+            "media_folder",
+        )
+        .with_resource_id(m.id),
+        &state.db,
+    )
+    .await;
+
+    Ok(FolderResp {
+        id: m.id,
+        tenant_id: m.tenant_id,
+        name: m.name,
+        parent_id: m.parent_id,
+        sort_order: m.sort_order,
+        children: vec![],
+        item_count: 0,
+        created_at: m.created_at,
+        updated_at: m.updated_at,
+        version: m.version,
+    })
+}
+
+/// 删除文件夹（仅当文件夹为空时允许删除）
+pub async fn delete_folder(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+    operator_id: Option<Uuid>,
+    version: i32,
+) -> HealthResult<()> {
+    let model = find_media_folder(state, tenant_id, id).await?;
+    let next_ver =
+        check_version(version, model.version).map_err(|_| HealthError::VersionMismatch)?;
+
+    // 检查是否包含文件
+    let item_count = media_item::Entity::find()
+        .filter(media_item::Column::TenantId.eq(tenant_id))
+        .filter(media_item::Column::FolderId.eq(id))
+        .filter(media_item::Column::DeletedAt.is_null())
+        .count(&state.db)
+        .await?;
+
+    if item_count > 0 {
+        return Err(HealthError::Validation(
+            "文件夹内仍有文件，无法删除".to_string(),
+        ));
+    }
+
+    // 检查是否包含子文件夹
+    let child_count = media_folder::Entity::find()
+        .filter(media_folder::Column::TenantId.eq(tenant_id))
+        .filter(media_folder::Column::ParentId.eq(id))
+        .filter(media_folder::Column::DeletedAt.is_null())
+        .count(&state.db)
+        .await?;
+
+    if child_count > 0 {
+        return Err(HealthError::Validation(
+            "文件夹内仍有子文件夹，无法删除".to_string(),
+        ));
+    }
+
+    // 软删除
+    let mut active: media_folder::ActiveModel = model.into();
+    active.deleted_at = Set(Some(Utc::now()));
+    active.updated_at = Set(Utc::now());
+    active.updated_by = Set(operator_id);
+    active.version = Set(next_ver);
+    active.update(&state.db).await?;
+
+    audit_service::record(
+        AuditLog::new(
+            tenant_id,
+            operator_id,
+            "media_folder.deleted",
+            "media_folder",
+        )
+        .with_resource_id(id),
+        &state.db,
+    )
+    .await;
+
+    Ok(())
+}
+
+// ---------------------------------------------------------------------------
+// 内部辅助函数
+// ---------------------------------------------------------------------------
+
+/// 查找媒体文件（未删除）
+async fn find_media_item(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+) -> HealthResult<media_item::Model> {
+    media_item::Entity::find()
+        .filter(media_item::Column::Id.eq(id))
+        .filter(media_item::Column::TenantId.eq(tenant_id))
+        .filter(media_item::Column::DeletedAt.is_null())
+        .one(&state.db)
+        .await?
+        .ok_or(HealthError::MediaNotFound)
+}
+
+/// 查找文件夹（未删除）
+async fn find_media_folder(
+    state: &HealthState,
+    tenant_id: Uuid,
+    id: Uuid,
+) -> HealthResult<media_folder::Model> {
+    media_folder::Entity::find()
+        .filter(media_folder::Column::Id.eq(id))
+        .filter(media_folder::Column::TenantId.eq(tenant_id))
+        .filter(media_folder::Column::DeletedAt.is_null())
+        .one(&state.db)
+        .await?
+        .ok_or(HealthError::MediaFolderNotFound)
+}
+
+/// 将实体模型转换为 DTO 响应
+fn model_to_resp(m: media_item::Model) -> MediaItemResp {
+    MediaItemResp {
+        id: m.id,
+        tenant_id: m.tenant_id,
+        folder_id: m.folder_id,
+        filename: m.filename,
+        storage_path: m.storage_path,
+        thumbnail_path: m.thumbnail_path,
+        content_type: m.content_type,
+        file_size: m.file_size,
+        width: m.width,
+        height: m.height,
+        alt_text: m.alt_text,
+        is_public: m.is_public,
+        created_at: m.created_at,
+        updated_at: m.updated_at,
+        created_by: m.created_by,
+        updated_by: m.updated_by,
+        version: m.version,
+    }
+}
+
+/// 读取图片文件的宽高（非图片或读取失败返回 None）
+fn read_image_dimensions(path: &Path) -> (Option<i32>, Option<i32>) {
+    image::open(path)
+        .map(|img| (Some(img.width() as i32), Some(img.height() as i32)))
+        .unwrap_or((None, None))
+}
+
+/// 根据存储路径推导缩略图路径（同目录下加 _thumb 后缀）
+fn generate_thumbnail_path(storage_path: &Path) -> Option<PathBuf> {
+    let stem = storage_path.file_stem()?.to_str()?;
+    let ext = storage_path.extension()?.to_str()?;
+    let parent = storage_path.parent()?;
+    Some(parent.join(format!("{}_thumb.{}", stem, ext)))
+}
+
+/// 将扁平文件夹列表组装成树形结构
+fn build_folder_tree(flat: Vec<FolderResp>) -> Vec<FolderResp> {
+    use std::collections::HashMap;
+
+    // id -> (parent_id, index in flat)
+    let mut by_id: HashMap<Uuid, (Option<Uuid>, usize)> = HashMap::new();
+    for (i, f) in flat.iter().enumerate() {
+        by_id.insert(f.id, (f.parent_id, i));
+    }
+
+    // 收集根节点
+    let mut root_ids: Vec<Uuid> = Vec::new();
+    for f in &flat {
+        match f.parent_id {
+            None => root_ids.push(f.id),
+            Some(pid) if !by_id.contains_key(&pid) => root_ids.push(f.id),
+            _ => {}
+        }
+    }
+
+    // 递归构建
+    fn build_children(parent_id: Uuid, flat: &[FolderResp]) -> Vec<FolderResp> {
+        let mut children: Vec<FolderResp> = Vec::new();
+        for f in flat {
+            if f.parent_id == Some(parent_id) {
+                let mut node = f.clone();
+                node.children = build_children(f.id, flat);
+                children.push(node);
+            }
+        }
+        children.sort_by_key(|c| c.sort_order);
+        children
+    }
+
+    let mut result: Vec<FolderResp> = Vec::new();
+    for rid in root_ids {
+        if let Some(&(_, idx)) = by_id.get(&rid) {
+            let mut node = flat[idx].clone();
+            node.children = build_children(rid, &flat);
+            result.push(node);
+        }
+    }
+    result.sort_by_key(|c| c.sort_order);
+    result
+}
diff --git a/crates/erp-health/src/service/mod.rs b/crates/erp-health/src/service/mod.rs
index 17bc2b5..f2d911e 100644
--- a/crates/erp-health/src/service/mod.rs
+++ b/crates/erp-health/src/service/mod.rs
@@ -25,6 +25,7 @@ pub mod follow_up_service;
 pub mod follow_up_template_service;
 pub mod health_data_service;
 pub mod masking;
+pub mod media_service;
 pub mod medication_record_service;
 pub mod medication_reminder_service;
 pub mod patient_service;
diff --git a/crates/erp-server/migration/src/lib.rs b/crates/erp-server/migration/src/lib.rs
index 4988c0c..189e2d1 100644
--- a/crates/erp-server/migration/src/lib.rs
+++ b/crates/erp-server/migration/src/lib.rs
@@ -135,6 +135,9 @@ mod m20260508_000130_fix_operator_permissions_and_nurse_devices;
 mod m20260508_000131_fix_all_role_permissions;
 mod m20260508_000132_fix_doctor_permissions_restore;
 mod m20260510_000133_create_patient_role;
+mod m20260510_000134_create_media_folder;
+mod m20260510_000135_create_media_item;
+mod m20260510_000136_create_banner;
 
 pub struct Migrator;
 
@@ -277,6 +280,9 @@ impl MigratorTrait for Migrator {
             Box::new(m20260508_000131_fix_all_role_permissions::Migration),
             Box::new(m20260508_000132_fix_doctor_permissions_restore::Migration),
             Box::new(m20260510_000133_create_patient_role::Migration),
+            Box::new(m20260510_000134_create_media_folder::Migration),
+            Box::new(m20260510_000135_create_media_item::Migration),
+            Box::new(m20260510_000136_create_banner::Migration),
         ]
     }
 }
diff --git a/crates/erp-server/migration/src/m20260510_000134_create_media_folder.rs b/crates/erp-server/migration/src/m20260510_000134_create_media_folder.rs
new file mode 100644
index 0000000..0279371
--- /dev/null
+++ b/crates/erp-server/migration/src/m20260510_000134_create_media_folder.rs
@@ -0,0 +1,99 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(MediaFolder::Table)
+                    .col(
+                        ColumnDef::new(MediaFolder::Id)
+                            .uuid()
+                            .not_null()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(MediaFolder::TenantId).uuid().not_null())
+                    .col(ColumnDef::new(MediaFolder::Name).string_len(100).not_null())
+                    .col(ColumnDef::new(MediaFolder::ParentId).uuid().null())
+                    .col(
+                        ColumnDef::new(MediaFolder::SortOrder)
+                            .integer()
+                            .not_null()
+                            .default(0),
+                    )
+                    .col(
+                        ColumnDef::new(MediaFolder::CreatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(
+                        ColumnDef::new(MediaFolder::UpdatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(ColumnDef::new(MediaFolder::CreatedBy).uuid().null())
+                    .col(ColumnDef::new(MediaFolder::UpdatedBy).uuid().null())
+                    .col(
+                        ColumnDef::new(MediaFolder::DeletedAt)
+                            .timestamp_with_time_zone()
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(MediaFolder::Version)
+                            .integer()
+                            .not_null()
+                            .default(1),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk_media_folder_parent")
+                            .from(MediaFolder::Table, MediaFolder::ParentId)
+                            .to(MediaFolder::Table, MediaFolder::Id)
+                            .on_delete(ForeignKeyAction::Cascade),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_media_folder_tenant_parent")
+                    .table(MediaFolder::Table)
+                    .col(MediaFolder::TenantId)
+                    .col(MediaFolder::ParentId)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(MediaFolder::Table).to_owned())
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum MediaFolder {
+    Table,
+    Id,
+    TenantId,
+    Name,
+    ParentId,
+    SortOrder,
+    CreatedAt,
+    UpdatedAt,
+    CreatedBy,
+    UpdatedBy,
+    DeletedAt,
+    Version,
+}
diff --git a/crates/erp-server/migration/src/m20260510_000135_create_media_item.rs b/crates/erp-server/migration/src/m20260510_000135_create_media_item.rs
new file mode 100644
index 0000000..9860e96
--- /dev/null
+++ b/crates/erp-server/migration/src/m20260510_000135_create_media_item.rs
@@ -0,0 +1,148 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(MediaItem::Table)
+                    .col(
+                        ColumnDef::new(MediaItem::Id)
+                            .uuid()
+                            .not_null()
+                            .primary_key(),
+                    )
+                    .col(ColumnDef::new(MediaItem::TenantId).uuid().not_null())
+                    .col(ColumnDef::new(MediaItem::FolderId).uuid().null())
+                    .col(
+                        ColumnDef::new(MediaItem::Filename)
+                            .string_len(255)
+                            .not_null(),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::StoragePath)
+                            .string_len(500)
+                            .not_null()
+                            .unique_key(),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::ThumbnailPath)
+                            .string_len(500)
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::ContentType)
+                            .string_len(100)
+                            .not_null(),
+                    )
+                    .col(ColumnDef::new(MediaItem::FileSize).big_integer().not_null())
+                    .col(ColumnDef::new(MediaItem::Width).integer().null())
+                    .col(ColumnDef::new(MediaItem::Height).integer().null())
+                    .col(ColumnDef::new(MediaItem::AltText).string_len(255).null())
+                    .col(
+                        ColumnDef::new(MediaItem::IsPublic)
+                            .boolean()
+                            .not_null()
+                            .default(false),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::CreatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::UpdatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(ColumnDef::new(MediaItem::CreatedBy).uuid().null())
+                    .col(ColumnDef::new(MediaItem::UpdatedBy).uuid().null())
+                    .col(
+                        ColumnDef::new(MediaItem::DeletedAt)
+                            .timestamp_with_time_zone()
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(MediaItem::Version)
+                            .integer()
+                            .not_null()
+                            .default(1),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk_media_item_folder")
+                            .from(MediaItem::Table, MediaItem::FolderId)
+                            .to(MediaFolderRef::Table, MediaFolderRef::Id)
+                            .on_delete(ForeignKeyAction::SetNull),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_media_item_tenant_folder")
+                    .table(MediaItem::Table)
+                    .col(MediaItem::TenantId)
+                    .col(MediaItem::FolderId)
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_media_item_tenant_public")
+                    .table(MediaItem::Table)
+                    .col(MediaItem::TenantId)
+                    .col(MediaItem::IsPublic)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(MediaItem::Table).to_owned())
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum MediaItem {
+    Table,
+    Id,
+    TenantId,
+    FolderId,
+    Filename,
+    StoragePath,
+    ThumbnailPath,
+    ContentType,
+    FileSize,
+    Width,
+    Height,
+    AltText,
+    IsPublic,
+    CreatedAt,
+    UpdatedAt,
+    CreatedBy,
+    UpdatedBy,
+    DeletedAt,
+    Version,
+}
+
+/// 外键引用 media_folder 表
+#[derive(DeriveIden)]
+enum MediaFolderRef {
+    Table,
+    Id,
+}
diff --git a/crates/erp-server/migration/src/m20260510_000136_create_banner.rs b/crates/erp-server/migration/src/m20260510_000136_create_banner.rs
new file mode 100644
index 0000000..ed5a564
--- /dev/null
+++ b/crates/erp-server/migration/src/m20260510_000136_create_banner.rs
@@ -0,0 +1,136 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .create_table(
+                Table::create()
+                    .table(Banner::Table)
+                    .col(ColumnDef::new(Banner::Id).uuid().not_null().primary_key())
+                    .col(ColumnDef::new(Banner::TenantId).uuid().not_null())
+                    .col(ColumnDef::new(Banner::MediaItemId).uuid().not_null())
+                    .col(ColumnDef::new(Banner::Title).string_len(100).null())
+                    .col(ColumnDef::new(Banner::Subtitle).string_len(255).null())
+                    .col(ColumnDef::new(Banner::LinkType).string_len(20).null())
+                    .col(ColumnDef::new(Banner::LinkTarget).string_len(500).null())
+                    .col(
+                        ColumnDef::new(Banner::SortOrder)
+                            .integer()
+                            .not_null()
+                            .default(0),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::Status)
+                            .string_len(20)
+                            .not_null()
+                            .default("active"),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::StartTime)
+                            .timestamp_with_time_zone()
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::EndTime)
+                            .timestamp_with_time_zone()
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::CreatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::UpdatedAt)
+                            .timestamp_with_time_zone()
+                            .not_null()
+                            .default(Expr::current_timestamp()),
+                    )
+                    .col(ColumnDef::new(Banner::CreatedBy).uuid().null())
+                    .col(ColumnDef::new(Banner::UpdatedBy).uuid().null())
+                    .col(
+                        ColumnDef::new(Banner::DeletedAt)
+                            .timestamp_with_time_zone()
+                            .null(),
+                    )
+                    .col(
+                        ColumnDef::new(Banner::Version)
+                            .integer()
+                            .not_null()
+                            .default(1),
+                    )
+                    .foreign_key(
+                        ForeignKey::create()
+                            .name("fk_banner_media_item")
+                            .from(Banner::Table, Banner::MediaItemId)
+                            .to(MediaItemRef::Table, MediaItemRef::Id)
+                            .on_delete(ForeignKeyAction::Restrict),
+                    )
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_banner_tenant_status")
+                    .table(Banner::Table)
+                    .col(Banner::TenantId)
+                    .col(Banner::Status)
+                    .to_owned(),
+            )
+            .await?;
+
+        manager
+            .create_index(
+                Index::create()
+                    .name("idx_banner_sort")
+                    .table(Banner::Table)
+                    .col(Banner::SortOrder)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_table(Table::drop().table(Banner::Table).to_owned())
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum Banner {
+    Table,
+    Id,
+    TenantId,
+    MediaItemId,
+    Title,
+    Subtitle,
+    LinkType,
+    LinkTarget,
+    SortOrder,
+    Status,
+    StartTime,
+    EndTime,
+    CreatedAt,
+    UpdatedAt,
+    CreatedBy,
+    UpdatedBy,
+    DeletedAt,
+    Version,
+}
+
+/// 外键引用 media_item 表
+#[derive(DeriveIden)]
+enum MediaItemRef {
+    Table,
+    Id,
+}