diff --git a/docs/admin-management.md b/docs/admin-management.md
index 96a5ff4..4ffe870 100644
--- a/docs/admin-management.md
+++ b/docs/admin-management.md
@@ -26,9 +26,11 @@ dotnet user-secrets remove "Bootstrap:SystemAdministrator:Password" --project sr
 
 - `/admin/dashboard`：仅显示当前授权范围内的汇总。
 - `/admin/regions` 与 `/admin/region-import`：系统管理员导入 AreaCity 四级目录；村/社区使用本地确认目录。
-- `/admin/voters` 与 `/admin/voter-import`：按地域维护选民、预校验并确认 Excel 导入。
+- `/admin/voters` 与 `/admin/voter-import`：按地域维护选民、预校验并确认 Excel 导入。选民列表使用每页 50 条的游标分页，并支持省→市→区县→镇街四级级联筛选。
 - `/admin/candidates`：维护候选人资料和服务端允许的状态转换。
 - `/admin/roles`：系统管理员授予地域管理员、计票员或监督员角色。
-- `/admin/counting-stations`：建立辖区计票所，并向已获地域角色的人员分配具体计票所。
+- `/admin/counting-stations`：建立辖区计票所，并向已获地域角色的人员分配具体计票所；列表同样使用游标分页及四级级联筛选。
+
+对应管理 API 提供 `GET /api/admin/voters/cursor` 与 `GET /api/admin/counting-stations/cursor`。`cursor` 只能用于同一组筛选条件；筛选范围、下级地域展开和管理员地域授权均在服务端先行执行。非法游标或跨层级、越权的行政区划参数会返回 `400`，不会放宽数据范围。
 
 管理端用于第二阶段基础资料与授权操作。选举活动、匿名投票、线下双录计票和公开结果将在后续阶段接入相应菜单，且不会通过本阶段页面绕过其规则。
diff --git a/src/ElectionSystem.Api/Common/Pagination/CursorPagedResult.cs b/src/ElectionSystem.Api/Common/Pagination/CursorPagedResult.cs
new file mode 100644
index 0000000..1c078a4
--- /dev/null
+++ b/src/ElectionSystem.Api/Common/Pagination/CursorPagedResult.cs
@@ -0,0 +1,33 @@
+using System.Text;
+using System.Text.Json;
+
+namespace ElectionSystem.Api.Common.Pagination;
+
+/// <summary>Keyset-pagination response. The cursor represents the last item in the current stable ordering.</summary>
+public sealed record CursorPagedResult<T>(IReadOnlyCollection<T> Items, string? NextCursor, bool HasMore, int PageSize);
+
+public static class CursorToken
+{
+    private static readonly JsonSerializerOptions SerializerOptions = new(JsonSerializerDefaults.Web);
+
+    public static string Encode<T>(T value)
+    {
+        var bytes = JsonSerializer.SerializeToUtf8Bytes(value, SerializerOptions);
+        return Convert.ToBase64String(bytes).TrimEnd('=').Replace('+', '-').Replace('/', '_');
+    }
+
+    public static bool TryDecode<T>(string? cursor, out T? value)
+    {
+        value = default;
+        if (string.IsNullOrWhiteSpace(cursor)) return true;
+        try
+        {
+            var normalized = cursor.Replace('-', '+').Replace('_', '/');
+            normalized = normalized.PadRight(normalized.Length + (4 - normalized.Length % 4) % 4, '=');
+            value = JsonSerializer.Deserialize<T>(Convert.FromBase64String(normalized), SerializerOptions);
+            return value is not null;
+        }
+        catch (FormatException) { return false; }
+        catch (JsonException) { return false; }
+    }
+}
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/Candidates.razor b/src/ElectionSystem.Api/Components/Pages/Admin/Candidates.razor
index 53a8f00..6adac70 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/Candidates.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/Candidates.razor
@@ -1,4 +1,5 @@
 @page "/admin/candidates"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/CountingStations.razor b/src/ElectionSystem.Api/Components/Pages/Admin/CountingStations.razor
index bdf62f6..1790224 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/CountingStations.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/CountingStations.razor
@@ -1,16 +1,25 @@
 @page "/admin/counting-stations"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
 @inject RegionScopeService Scope
+@inject RegionCascadeFilterService Cascade
 
 <PageTitle>计票所管理</PageTitle>
-<section class="admin-page"><div class="admin-page__heading"><div><p class="eyebrow">人员与场所 / 计票</p><h1>计票所管理</h1><p>计票员与监督员后续必须再分配到具体计票所，才能参与线下计票。</p></div><button class="admin-button" @onclick="() => creating = !creating">新增计票所</button></div>
-@if (notice is not null) { <div class="admin-alert">@notice</div> } @if (creating) { <EditForm Model="draft" OnValidSubmit="CreateAsync" class="admin-form"><h2>新增计票所</h2><label>计票所代码<input @bind="draft.Code" required /></label><label>名称<input @bind="draft.Name" required /></label><label>所属地区<select @bind="draft.RegionId"><option value="">请选择地区</option>@foreach (var r in regions) { <option value="@r.Id">@r.Name</option> }</select></label><div><button class="admin-button" type="submit">保存</button><button class="admin-link-button" type="button" @onclick="() => creating = false">取消</button></div></EditForm> }
-<div class="admin-table-wrap"><table class="admin-table"><thead><tr><th>代码</th><th>名称</th><th>所属地区</th><th>状态</th></tr></thead><tbody>@if (!loaded) { <tr><td colspan="4">正在加载…</td></tr> } else if (stations.Count == 0) { <tr><td colspan="4" class="admin-empty">暂无计票所。</td></tr> } @foreach (var station in stations) { <tr><td class="admin-mono">@station.Code</td><td>@station.Name</td><td>@station.Region</td><td>@(station.Active ? "启用" : "停用")</td></tr> }</tbody></table></div>
+<section class="admin-page"><div class="admin-page__heading"><div><p class="eyebrow">人员与场所 / 计票</p><h1>计票所管理</h1><p>按四级行政区划筛选；工作人员必须另行分配到具体计票所。</p></div><button class="admin-button" @onclick="() => creating = !creating">新增计票所</button></div>
+@if (notice is not null) { <div class="admin-alert">@notice</div> }
+<div class="admin-filter admin-filter--regions"><label>省<select value="@provinceId" @onchange="SelectProvinceAsync"><option value="">全部省份</option>@foreach (var x in Options(AdministrativeRegionLevel.Province, null)) { <option value="@x.Id">@x.Name</option> }</select></label><label>市<select value="@cityId" @onchange="SelectCityAsync"><option value="">全部城市</option>@foreach (var x in Options(AdministrativeRegionLevel.City, provinceId)) { <option value="@x.Id">@x.Name</option> }</select></label><label>区县<select value="@districtId" @onchange="SelectDistrictAsync"><option value="">全部区县</option>@foreach (var x in Options(AdministrativeRegionLevel.District, cityId)) { <option value="@x.Id">@x.Name</option> }</select></label><label>镇街<select value="@townshipId" @onchange="SelectTownshipAsync"><option value="">全部镇街</option>@foreach (var x in Options(AdministrativeRegionLevel.Township, districtId)) { <option value="@x.Id">@x.Name</option> }</select></label><label>名称或代码<input @bind="keyword" @bind:event="oninput" placeholder="输入后点击查询" /></label><button class="admin-button admin-button--quiet" @onclick="SearchAsync">查询</button></div>
+@if (creating) { <EditForm Model="draft" OnValidSubmit="CreateAsync" class="admin-form"><h2>新增计票所</h2><label>计票所代码<input @bind="draft.Code" required /></label><label>名称<input @bind="draft.Name" required /></label><label>所属地区<select @bind="draft.RegionId"><option value="">请选择地区</option>@foreach (var r in regions) { <option value="@r.Id">@r.Path</option> }</select></label><div><button class="admin-button" type="submit">保存</button><button class="admin-link-button" type="button" @onclick="() => creating = false">取消</button></div></EditForm> }
+<div class="admin-table-wrap"><table class="admin-table"><thead><tr><th>代码</th><th>名称</th><th>所属地区</th><th>状态</th></tr></thead><tbody>@if (!loaded) { <tr><td colspan="4">正在加载…</td></tr> } else if (stations.Count == 0) { <tr><td colspan="4" class="admin-empty">暂无计票所。</td></tr> } @foreach (var station in stations) { <tr><td class="admin-mono">@station.Code</td><td>@station.Name</td><td>@station.Region</td><td>@(station.Active ? "启用" : "停用")</td></tr> }</tbody></table></div><div class="admin-pagination"><button class="admin-link-button" disabled="@(cursorHistory.Count == 0)" @onclick="PreviousAsync">上一页</button><span>每页 @PageSize 条</span><button class="admin-link-button" disabled="@(nextCursor is null)" @onclick="NextAsync">下一页</button></div>
 <EditForm Model="staffDraft" OnValidSubmit="AssignStaffAsync" class="admin-form"><h2>分配计票所工作人员</h2><label>计票所<select @bind="staffDraft.StationId"><option value="">请选择计票所</option>@foreach (var station in stationChoices) { <option value="@station.Id">@station.Name</option> }</select></label><label>用户 ID<input @bind="staffDraft.UserId" placeholder="用户 GUID" required /></label><button class="admin-button" type="submit">分配工作人员</button></EditForm></section>
-@code { [CascadingParameter] private Task<AuthenticationState> AuthenticationStateTask { get; set; } = default!; private HashSet<Guid> scope = []; private bool loaded, creating; private string? notice; private StationDraft draft = new(); private StaffDraft staffDraft = new(); private readonly List<Region> regions = []; private readonly List<StationRow> stations = []; private readonly List<StationChoice> stationChoices = [];
- protected override async Task OnInitializedAsync() { regions.Clear(); stations.Clear(); stationChoices.Clear(); var id = RegionScopeService.GetRequiredUserId((await AuthenticationStateTask).User); scope = await Scope.GetManagedRegionIdsAsync(id, CancellationToken.None); var map = await Db.AdministrativeRegions.Where(x => scope.Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name); regions.AddRange(map.Select(x => new Region(x.Key, x.Value))); var entities = await Db.CountingStations.Where(x => scope.Contains(x.RegionId)).OrderBy(x => x.Code).ToListAsync(); stations.AddRange(entities.Select(x => new StationRow(x.Code, x.Name, map.GetValueOrDefault(x.RegionId, "—"), x.IsActive))); stationChoices.AddRange(entities.Where(x => x.IsActive).Select(x => new StationChoice(x.Id, x.Name))); loaded = true; }
- private async Task CreateAsync() { if (!draft.RegionId.HasValue || !scope.Contains(draft.RegionId.Value)) { notice = "请选择您有权管理的地区。"; return; } if (await Db.CountingStations.AnyAsync(x => x.Code == draft.Code)) { notice = "计票所代码已存在。"; return; } Db.CountingStations.Add(new CountingStation { Code = draft.Code.Trim(), Name = draft.Name.Trim(), RegionId = draft.RegionId.Value }); await Db.SaveChangesAsync(); notice = "计票所已创建。"; creating = false; stations.Clear(); regions.Clear(); await OnInitializedAsync(); }
+@code { private const int PageSize = 50; [CascadingParameter] private Task<AuthenticationState> AuthenticationStateTask { get; set; } = default!; private HashSet<Guid> scope = []; private bool loaded, creating; private string? notice, currentCursor, nextCursor; private string keyword = ""; private Guid? provinceId, cityId, districtId, townshipId; private StationDraft draft = new(); private StaffDraft staffDraft = new(); private readonly List<Region> regions = []; private readonly List<Region> filterRegions = []; private readonly List<StationRow> stations = []; private readonly List<StationChoice> stationChoices = []; private readonly List<string?> cursorHistory = [];
+ protected override async Task OnInitializedAsync() { var id = RegionScopeService.GetRequiredUserId((await AuthenticationStateTask).User); scope = await Scope.GetManagedRegionIdsAsync(id, CancellationToken.None); var all = await Db.AdministrativeRegions.Where(x => scope.Contains(x.Id) && x.IsActive).OrderBy(x => x.Level).ThenBy(x => x.Code).ToListAsync(); regions.AddRange(all.Select(x => new Region(x.Id, x.ParentId, x.Level, x.Name, $"{x.Level}: {x.Name}"))); filterRegions.AddRange(regions); await LoadStationChoicesAsync(); await SearchAsync(); }
+ private IEnumerable<Region> Options(AdministrativeRegionLevel level, Guid? parentId) => filterRegions.Where(x => x.Level == level && (!parentId.HasValue || x.ParentId == parentId)).OrderBy(x => x.Name);
+ private async Task LoadStationChoicesAsync() { var map = await Db.AdministrativeRegions.Where(x => scope.Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name); stationChoices.Clear(); stationChoices.AddRange((await Db.CountingStations.Where(x => scope.Contains(x.RegionId) && x.IsActive).OrderBy(x => x.Code).ToListAsync()).Select(x => new StationChoice(x.Id, $"{x.Code} · {x.Name}（{map.GetValueOrDefault(x.RegionId, "—")}）"))); }
+ private async Task SelectProvinceAsync(ChangeEventArgs e) { provinceId = Parse(e); cityId = districtId = townshipId = null; await SearchAsync(); } private async Task SelectCityAsync(ChangeEventArgs e) { cityId = Parse(e); districtId = townshipId = null; await SearchAsync(); } private async Task SelectDistrictAsync(ChangeEventArgs e) { districtId = Parse(e); townshipId = null; await SearchAsync(); } private async Task SelectTownshipAsync(ChangeEventArgs e) { townshipId = Parse(e); await SearchAsync(); } private static Guid? Parse(ChangeEventArgs e) => Guid.TryParse(e.Value?.ToString(), out var id) ? id : null;
+ private async Task SearchAsync() { currentCursor = null; cursorHistory.Clear(); await LoadAsync(); } private async Task NextAsync() { if (nextCursor is null) return; cursorHistory.Add(currentCursor); currentCursor = nextCursor; await LoadAsync(); } private async Task PreviousAsync() { if (cursorHistory.Count == 0) return; currentCursor = cursorHistory[^1]; cursorHistory.RemoveAt(cursorHistory.Count - 1); await LoadAsync(); }
+ private async Task LoadAsync() { loaded = false; try { var selectedRegions = await Cascade.ResolveAsync(scope, new(provinceId, cityId, districtId, townshipId), CancellationToken.None); var query = Db.CountingStations.Where(x => selectedRegions.Contains(x.RegionId)); if (!string.IsNullOrWhiteSpace(keyword)) query = query.Where(x => x.Code.Contains(keyword) || x.Name.Contains(keyword)); if (!CursorToken.TryDecode<Cursor>(currentCursor, out var token)) throw new InvalidOperationException("分页游标无效，请重新查询。"); if (token is not null) query = query.Where(x => string.Compare(x.Code, token.Code) > 0 || (x.Code == token.Code && x.Id.CompareTo(token.Id) > 0)); var rows = await query.OrderBy(x => x.Code).ThenBy(x => x.Id).Take(PageSize + 1).ToListAsync(); var hasMore = rows.Count > PageSize; if (hasMore) rows.RemoveAt(rows.Count - 1); var map = await Db.AdministrativeRegions.Where(x => rows.Select(y => y.RegionId).Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name); stations.Clear(); stations.AddRange(rows.Select(x => new StationRow(x.Id, x.Code, x.Name, map.GetValueOrDefault(x.RegionId, "—"), x.IsActive))); nextCursor = hasMore && rows.Count > 0 ? CursorToken.Encode(new Cursor(rows[^1].Code, rows[^1].Id)) : null; } catch (ArgumentException e) { notice = e.Message; stations.Clear(); nextCursor = null; } finally { loaded = true; } }
+ private async Task CreateAsync() { if (!draft.RegionId.HasValue || !scope.Contains(draft.RegionId.Value)) { notice = "请选择您有权管理的地区。"; return; } if (await Db.CountingStations.AnyAsync(x => x.Code == draft.Code)) { notice = "计票所代码已存在。"; return; } Db.CountingStations.Add(new CountingStation { Code = draft.Code.Trim(), Name = draft.Name.Trim(), RegionId = draft.RegionId.Value }); await Db.SaveChangesAsync(); notice = "计票所已创建。"; creating = false; draft = new(); await LoadStationChoicesAsync(); await SearchAsync(); }
  private async Task AssignStaffAsync() { if (!staffDraft.StationId.HasValue || !Guid.TryParse(staffDraft.UserId, out var userId)) { notice = "请选择计票所并输入有效用户 ID。"; return; } var station = await Db.CountingStations.FindAsync(staffDraft.StationId); if (station is null || !scope.Contains(station.RegionId)) { notice = "不能管理此计票所。"; return; } if (!await Db.UserRegionalRoleAssignments.AnyAsync(x => x.UserId == userId && x.RegionId == station.RegionId && (x.Role == RegionalRole.CountingStationClerk || x.Role == RegionalRole.Supervisor))) { notice = "用户必须先取得本辖区的计票员或监督员角色。"; return; } if (await Db.UserCountingStationAssignments.AnyAsync(x => x.UserId == userId && x.CountingStationId == station.Id)) { notice = "该用户已分配到此计票所。"; return; } Db.UserCountingStationAssignments.Add(new UserCountingStationAssignment { UserId = userId, CountingStationId = station.Id }); await Db.SaveChangesAsync(); notice = "工作人员已分配。"; staffDraft = new(); }
- private sealed class StationDraft { public string Code { get; set; } = ""; public string Name { get; set; } = ""; public Guid? RegionId { get; set; } } private sealed class StaffDraft { public Guid? StationId { get; set; } public string UserId { get; set; } = ""; } private sealed record Region(Guid Id, string Name); private sealed record StationRow(string Code, string Name, string Region, bool Active); private sealed record StationChoice(Guid Id, string Name); }
+ private sealed class StationDraft { public string Code { get; set; } = ""; public string Name { get; set; } = ""; public Guid? RegionId { get; set; } } private sealed class StaffDraft { public Guid? StationId { get; set; } public string UserId { get; set; } = ""; } private sealed record Region(Guid Id, Guid? ParentId, AdministrativeRegionLevel Level, string Name, string Path); private sealed record StationRow(Guid Id, string Code, string Name, string Region, bool Active); private sealed record StationChoice(Guid Id, string Name); private sealed record Cursor(string Code, Guid Id); }
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/Dashboard.razor b/src/ElectionSystem.Api/Components/Pages/Admin/Dashboard.razor
index 880936d..a5e00a6 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/Dashboard.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/Dashboard.razor
@@ -1,4 +1,5 @@
 @page "/admin/dashboard"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/Regions.razor b/src/ElectionSystem.Api/Components/Pages/Admin/Regions.razor
index 4374417..a21058a 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/Regions.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/Regions.razor
@@ -1,4 +1,5 @@
 @page "/admin/regions"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/Roles.razor b/src/ElectionSystem.Api/Components/Pages/Admin/Roles.razor
index 2ebe6bd..89a9db9 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/Roles.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/Roles.razor
@@ -1,4 +1,5 @@
 @page "/admin/roles"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
diff --git a/src/ElectionSystem.Api/Components/Pages/Admin/Voters.razor b/src/ElectionSystem.Api/Components/Pages/Admin/Voters.razor
index 88ec35a..ef3fe7c 100644
--- a/src/ElectionSystem.Api/Components/Pages/Admin/Voters.razor
+++ b/src/ElectionSystem.Api/Components/Pages/Admin/Voters.razor
@@ -1,27 +1,46 @@
 @page "/admin/voters"
+@rendermode InteractiveServer
 @attribute [Authorize]
 @layout AdminLayout
 @inject ElectionDbContext Db
 @inject RegionScopeService Scope
+@inject RegionCascadeFilterService Cascade
 
 <PageTitle>选民管理</PageTitle>
 <section class="admin-page">
- <div class="admin-page__heading"><div><p class="eyebrow">基础资料 / 选民</p><h1>选民管理</h1><p>只能查询和维护当前辖区及下级地区的选民。</p></div><button class="admin-button" @onclick="ToggleCreate">新增选民</button></div>
+ <div class="admin-page__heading"><div><p class="eyebrow">基础资料 / 选民</p><h1>选民管理</h1><p>按省、市、区县、镇街筛选；结果仅包含当前辖区及下级地区。</p></div><button class="admin-button" @onclick="ToggleCreate">新增选民</button></div>
  @if (message is not null) { <div class="admin-alert">@message</div> }
- <div class="admin-filter"><label>姓名或编号<input @bind="keyword" @bind:event="oninput" placeholder="输入后筛选" /></label><label>状态<select @bind="status"><option value="">全部状态</option><option value="Active">有效</option><option value="Disabled">已停用</option><option value="PendingReview">待审核</option></select></label><button class="admin-button admin-button--quiet" @onclick="LoadAsync">查询</button></div>
+ <div class="admin-filter admin-filter--regions">
+  <label>省<select value="@provinceId" @onchange="SelectProvinceAsync"><option value="">全部省份</option>@foreach (var x in Options(AdministrativeRegionLevel.Province, null)) { <option value="@x.Id">@x.Name</option> }</select></label>
+  <label>市<select value="@cityId" @onchange="SelectCityAsync"><option value="">全部城市</option>@foreach (var x in Options(AdministrativeRegionLevel.City, provinceId)) { <option value="@x.Id">@x.Name</option> }</select></label>
+  <label>区县<select value="@districtId" @onchange="SelectDistrictAsync"><option value="">全部区县</option>@foreach (var x in Options(AdministrativeRegionLevel.District, cityId)) { <option value="@x.Id">@x.Name</option> }</select></label>
+  <label>镇街<select value="@townshipId" @onchange="SelectTownshipAsync"><option value="">全部镇街</option>@foreach (var x in Options(AdministrativeRegionLevel.Township, districtId)) { <option value="@x.Id">@x.Name</option> }</select></label>
+  <label>姓名或编号<input @bind="keyword" @bind:event="oninput" placeholder="输入后点击查询" /></label><label>状态<select @bind="status"><option value="">全部状态</option><option value="Active">有效</option><option value="Disabled">已停用</option><option value="PendingReview">待审核</option></select></label><button class="admin-button admin-button--quiet" @onclick="SearchAsync">查询</button>
+ </div>
  @if (creating) { <EditForm Model="draft" OnValidSubmit="CreateAsync" class="admin-form"><DataAnnotationsValidator /><h2>新增选民</h2><label>选民编号<input @bind="draft.VoterNumber" required maxlength="64" /></label><label>姓名<input @bind="draft.DisplayName" required maxlength="128" /></label><label>行政区划<select @bind="draft.RegionId" required><option value="">请选择辖区</option>@foreach (var region in regions) { <option value="@region.Id">@region.Path</option> }</select></label><div><button class="admin-button" type="submit">保存选民</button><button class="admin-link-button" type="button" @onclick="ToggleCreate">取消</button></div></EditForm> }
- @if (!loaded) { <p class="admin-loading">正在加载选民…</p> } else { <div class="admin-table-wrap"><table class="admin-table"><thead><tr><th>选民编号</th><th>姓名</th><th>所属地区</th><th>状态</th><th>操作</th></tr></thead><tbody>@if (voters.Count == 0) { <tr><td colspan="5" class="admin-empty">当前条件下没有选民。可先从“选民导入”上传名单。</td></tr> } @foreach (var voter in voters) { <tr><td>@voter.VoterNumber</td><td>@voter.DisplayName</td><td>@voter.RegionName</td><td><span class="admin-status @voter.Status">@StatusText(voter.Status)</span></td><td>@if (voter.Status == VoterStatus.Disabled) { <button class="admin-link-button" @onclick="() => SetStatusAsync(voter, VoterStatus.Active)">恢复</button> } else { <button class="admin-link-button admin-link-button--danger" @onclick="() => SetStatusAsync(voter, VoterStatus.Disabled)">停用</button> }</td></tr> }</tbody></table></div> }
+ @if (!loaded) { <p class="admin-loading">正在加载选民…</p> } else { <div class="admin-table-wrap"><table class="admin-table"><thead><tr><th>选民编号</th><th>姓名</th><th>所属地区</th><th>状态</th><th>操作</th></tr></thead><tbody>@if (voters.Count == 0) { <tr><td colspan="5" class="admin-empty">当前条件下没有选民。可先从“选民导入”上传名单。</td></tr> } @foreach (var voter in voters) { <tr><td>@voter.VoterNumber</td><td>@voter.DisplayName</td><td>@voter.RegionName</td><td><span class="admin-status @voter.Status">@StatusText(voter.Status)</span></td><td>@if (voter.Status == VoterStatus.Disabled) { <button class="admin-link-button" @onclick="() => SetStatusAsync(voter, VoterStatus.Active)">恢复</button> } else { <button class="admin-link-button admin-link-button--danger" @onclick="() => SetStatusAsync(voter, VoterStatus.Disabled)">停用</button> }</td></tr> }</tbody></table></div><div class="admin-pagination"><button class="admin-link-button" disabled="@(cursorHistory.Count == 0)" @onclick="PreviousAsync">上一页</button><span>每页 @PageSize 条</span><button class="admin-link-button" disabled="@(nextCursor is null)" @onclick="NextAsync">下一页</button></div> }
 </section>
 @code {
+ private const int PageSize = 50;
  [CascadingParameter] private Task<AuthenticationState> AuthenticationStateTask { get; set; } = default!;
- private readonly List<VoterRow> voters = []; private readonly List<RegionOption> regions = []; private VoterDraft draft = new(); private string keyword = "", status = ""; private bool loaded, creating; private string? message; private HashSet<Guid> managed = [];
- protected override async Task OnInitializedAsync() { await LoadRegionsAsync(); await LoadAsync(); }
- private async Task LoadRegionsAsync() { var id = RegionScopeService.GetRequiredUserId((await AuthenticationStateTask).User); managed = await Scope.GetManagedRegionIdsAsync(id, CancellationToken.None); var all = await Db.AdministrativeRegions.Where(x => managed.Contains(x.Id) && x.IsActive).OrderBy(x => x.Level).ThenBy(x => x.Code).ToListAsync(); foreach (var x in all) regions.Add(new(x.Id, $"{x.Level}: {x.Name}")); }
- private async Task LoadAsync() { var query = Db.Voters.Where(x => managed.Contains(x.RegionId)); if (!string.IsNullOrWhiteSpace(keyword)) query = query.Where(x => x.VoterNumber.Contains(keyword) || x.DisplayName.Contains(keyword)); if (Enum.TryParse<VoterStatus>(status, out var state)) query = query.Where(x => x.Status == state); var names = await Db.AdministrativeRegions.ToDictionaryAsync(x => x.Id, x => x.Name); var rows = await query.OrderBy(x => x.DisplayName).Take(100).Select(x => new { x.Id, x.VoterNumber, x.DisplayName, x.RegionId, x.Status }).ToListAsync(); voters.Clear(); voters.AddRange(rows.Select(x => new VoterRow(x.Id, x.VoterNumber, x.DisplayName, names.GetValueOrDefault(x.RegionId, "—"), x.Status))); loaded = true; }
+ private readonly List<VoterRow> voters = []; private readonly List<RegionOption> regions = []; private readonly List<RegionOption> filterRegions = []; private readonly List<string?> cursorHistory = [];
+ private VoterDraft draft = new(); private string keyword = "", status = ""; private bool loaded, creating; private string? message, currentCursor, nextCursor; private HashSet<Guid> managed = []; private Guid? provinceId, cityId, districtId, townshipId;
+ protected override async Task OnInitializedAsync() { await LoadRegionsAsync(); await SearchAsync(); }
+ private async Task LoadRegionsAsync() { var id = RegionScopeService.GetRequiredUserId((await AuthenticationStateTask).User); managed = await Scope.GetManagedRegionIdsAsync(id, CancellationToken.None); var all = await Db.AdministrativeRegions.Where(x => managed.Contains(x.Id) && x.IsActive).OrderBy(x => x.Level).ThenBy(x => x.Code).ToListAsync(); filterRegions.AddRange(all.Select(x => new RegionOption(x.Id, x.ParentId, x.Level, x.Name, $"{x.Level}: {x.Name}"))); regions.AddRange(filterRegions); }
+ private IEnumerable<RegionOption> Options(AdministrativeRegionLevel level, Guid? parentId) => filterRegions.Where(x => x.Level == level && (!parentId.HasValue || x.ParentId == parentId)).OrderBy(x => x.Name);
+ private async Task SelectProvinceAsync(ChangeEventArgs e) { provinceId = Parse(e); cityId = districtId = townshipId = null; await SearchAsync(); }
+ private async Task SelectCityAsync(ChangeEventArgs e) { cityId = Parse(e); districtId = townshipId = null; await SearchAsync(); }
+ private async Task SelectDistrictAsync(ChangeEventArgs e) { districtId = Parse(e); townshipId = null; await SearchAsync(); }
+ private async Task SelectTownshipAsync(ChangeEventArgs e) { townshipId = Parse(e); await SearchAsync(); }
+ private static Guid? Parse(ChangeEventArgs e) => Guid.TryParse(e.Value?.ToString(), out var id) ? id : null;
+ private async Task SearchAsync() { currentCursor = null; cursorHistory.Clear(); await LoadAsync(); }
+ private async Task NextAsync() { if (nextCursor is null) return; cursorHistory.Add(currentCursor); currentCursor = nextCursor; await LoadAsync(); }
+ private async Task PreviousAsync() { if (cursorHistory.Count == 0) return; currentCursor = cursorHistory[^1]; cursorHistory.RemoveAt(cursorHistory.Count - 1); await LoadAsync(); }
+ private async Task LoadAsync() { loaded = false; try { var selectedRegions = await Cascade.ResolveAsync(managed, new(provinceId, cityId, districtId, townshipId), CancellationToken.None); var query = Db.Voters.Where(x => selectedRegions.Contains(x.RegionId)); if (!string.IsNullOrWhiteSpace(keyword)) query = query.Where(x => x.VoterNumber.Contains(keyword) || x.DisplayName.Contains(keyword)); if (Enum.TryParse<VoterStatus>(status, out var state)) query = query.Where(x => x.Status == state); if (!CursorToken.TryDecode<Cursor>(currentCursor, out var token)) throw new InvalidOperationException("分页游标无效，请重新查询。"); if (token is not null) query = query.Where(x => string.Compare(x.DisplayName, token.DisplayName) > 0 || (x.DisplayName == token.DisplayName && x.Id.CompareTo(token.Id) > 0)); var rows = await query.OrderBy(x => x.DisplayName).ThenBy(x => x.Id).Take(PageSize + 1).Select(x => new { x.Id, x.VoterNumber, x.DisplayName, x.RegionId, x.Status }).ToListAsync(); var hasMore = rows.Count > PageSize; if (hasMore) rows.RemoveAt(rows.Count - 1); var names = await Db.AdministrativeRegions.Where(x => rows.Select(y => y.RegionId).Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name); voters.Clear(); voters.AddRange(rows.Select(x => new VoterRow(x.Id, x.VoterNumber, x.DisplayName, names.GetValueOrDefault(x.RegionId, "—"), x.Status))); nextCursor = hasMore && rows.Count > 0 ? CursorToken.Encode(new Cursor(rows[^1].DisplayName, rows[^1].Id)) : null; } catch (ArgumentException e) { message = e.Message; voters.Clear(); nextCursor = null; } finally { loaded = true; } }
  private void ToggleCreate() { creating = !creating; message = null; }
- private async Task CreateAsync() { if (!draft.RegionId.HasValue || !managed.Contains(draft.RegionId.Value)) { message = "请选择您有权管理的行政区划。"; return; } if (await Db.Voters.AnyAsync(x => x.VoterNumber == draft.VoterNumber)) { message = "选民编号已存在。"; return; } Db.Voters.Add(new VoterProfile { VoterNumber = draft.VoterNumber.Trim(), DisplayName = draft.DisplayName.Trim(), RegionId = draft.RegionId.Value }); await Db.SaveChangesAsync(); draft = new(); creating = false; message = "已新增选民。"; await LoadAsync(); }
+ private async Task CreateAsync() { if (!draft.RegionId.HasValue || !managed.Contains(draft.RegionId.Value)) { message = "请选择您有权管理的行政区划。"; return; } if (await Db.Voters.AnyAsync(x => x.VoterNumber == draft.VoterNumber)) { message = "选民编号已存在。"; return; } Db.Voters.Add(new VoterProfile { VoterNumber = draft.VoterNumber.Trim(), DisplayName = draft.DisplayName.Trim(), RegionId = draft.RegionId.Value }); await Db.SaveChangesAsync(); draft = new(); creating = false; message = "已新增选民。"; await SearchAsync(); }
  private async Task SetStatusAsync(VoterRow voter, VoterStatus target) { var entity = await Db.Voters.FindAsync(voter.Id); if (entity is null || !managed.Contains(entity.RegionId)) { message = "未找到可管理的选民。"; return; } entity.Status = target; entity.DisabledReason = target == VoterStatus.Disabled ? "管理员在管理端停用" : null; entity.UpdatedAtUtc = DateTime.UtcNow; await Db.SaveChangesAsync(); message = target == VoterStatus.Disabled ? "已停用选民。" : "已恢复选民。"; await LoadAsync(); }
  private static string StatusText(VoterStatus value) => value switch { VoterStatus.Active => "有效", VoterStatus.Disabled => "已停用", _ => "待审核" };
  private sealed class VoterDraft { public string VoterNumber { get; set; } = ""; public string DisplayName { get; set; } = ""; public Guid? RegionId { get; set; } }
- private sealed record VoterRow(Guid Id, string VoterNumber, string DisplayName, string RegionName, VoterStatus Status); private sealed record RegionOption(Guid Id, string Path);
+ private sealed record RegionOption(Guid Id, Guid? ParentId, AdministrativeRegionLevel Level, string Name, string Path); private sealed record VoterRow(Guid Id, string VoterNumber, string DisplayName, string RegionName, VoterStatus Status); private sealed record Cursor(string DisplayName, Guid Id);
 }
diff --git a/src/ElectionSystem.Api/Components/_Imports.razor b/src/ElectionSystem.Api/Components/_Imports.razor
index 2959a86..b0b6b4f 100644
--- a/src/ElectionSystem.Api/Components/_Imports.razor
+++ b/src/ElectionSystem.Api/Components/_Imports.razor
@@ -6,6 +6,7 @@
 @using Microsoft.AspNetCore.Components.Authorization
 @using Microsoft.EntityFrameworkCore
 @using ElectionSystem.Api.Infrastructure.Persistence
+@using ElectionSystem.Api.Common.Pagination
 @using ElectionSystem.Api.Modules.Organization
 @using ElectionSystem.Api.Modules.Organization.Domain
 @using ElectionSystem.Api.Modules.Voters.Domain
diff --git a/src/ElectionSystem.Api/Controllers/CountingStationsController.cs b/src/ElectionSystem.Api/Controllers/CountingStationsController.cs
index e1ab44a..8fb5ef8 100644
--- a/src/ElectionSystem.Api/Controllers/CountingStationsController.cs
+++ b/src/ElectionSystem.Api/Controllers/CountingStationsController.cs
@@ -1,3 +1,4 @@
+using ElectionSystem.Api.Common.Pagination;
 using ElectionSystem.Api.Infrastructure.Persistence;
 using ElectionSystem.Api.Modules.Organization.Domain;
 using Microsoft.AspNetCore.Mvc;
@@ -6,7 +7,7 @@ using Microsoft.EntityFrameworkCore;
 namespace ElectionSystem.Api.Controllers;
 
 [Route("api/admin/counting-stations")]
-public sealed class CountingStationsController(ElectionDbContext dbContext, Modules.Organization.RegionScopeService scopeService) : AdministrationControllerBase(scopeService)
+public sealed class CountingStationsController(ElectionDbContext dbContext, Modules.Organization.RegionScopeService scopeService, Modules.Organization.RegionCascadeFilterService cascadeFilterService) : AdministrationControllerBase(scopeService)
 {
     [HttpGet]
     public async Task<ActionResult> List([FromQuery] Guid? regionId, CancellationToken cancellationToken)
@@ -17,6 +18,32 @@ public sealed class CountingStationsController(ElectionDbContext dbContext, Modu
         return Ok(await query.OrderBy(x => x.Code).Select(x => new { x.Id, x.Code, x.Name, x.RegionId, x.IsActive }).ToListAsync(cancellationToken));
     }
 
+    [HttpGet("cursor")]
+    public async Task<ActionResult<CursorPagedResult<object>>> ListCursor(
+        [FromQuery] Guid? provinceId, [FromQuery] Guid? cityId, [FromQuery] Guid? districtId, [FromQuery] Guid? townshipId,
+        [FromQuery] string? keyword, [FromQuery] string? cursor, [FromQuery] int pageSize = 50, CancellationToken cancellationToken = default)
+    {
+        pageSize = Math.Clamp(pageSize, 1, 100);
+        if (!CursorToken.TryDecode<CountingStationCursor>(cursor, out var token)) return BadRequest(new { code = "invalid_cursor", message = "分页游标无效，请重新查询。" });
+        try
+        {
+            var managed = await ScopeService.GetManagedRegionIdsAsync(ActorId, cancellationToken);
+            var regions = await cascadeFilterService.ResolveAsync(managed, new(provinceId, cityId, districtId, townshipId), cancellationToken);
+            var query = dbContext.CountingStations.Where(x => regions.Contains(x.RegionId));
+            if (!string.IsNullOrWhiteSpace(keyword)) query = query.Where(x => x.Code.Contains(keyword) || x.Name.Contains(keyword));
+            if (token is not null) query = query.Where(x => string.Compare(x.Code, token.Code) > 0 || (x.Code == token.Code && x.Id.CompareTo(token.Id) > 0));
+            var rows = await query.OrderBy(x => x.Code).ThenBy(x => x.Id).Take(pageSize + 1)
+                .Select(x => new CountingStationCursorRow(x.Id, x.Code, x.Name, x.RegionId, x.IsActive)).ToListAsync(cancellationToken);
+            var hasMore = rows.Count > pageSize;
+            if (hasMore) rows.RemoveAt(rows.Count - 1);
+            var regionNames = await dbContext.AdministrativeRegions.Where(x => rows.Select(y => y.RegionId).Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name, cancellationToken);
+            var items = rows.Select(x => (object)new { x.Id, x.Code, x.Name, x.RegionId, RegionName = regionNames.GetValueOrDefault(x.RegionId, "—"), x.IsActive }).ToList();
+            var next = hasMore && rows.Count > 0 ? CursorToken.Encode(new CountingStationCursor(rows[^1].Code, rows[^1].Id)) : null;
+            return Ok(new CursorPagedResult<object>(items, next, hasMore, pageSize));
+        }
+        catch (ArgumentException exception) { return BadRequest(new { code = "invalid_region_filter", message = exception.Message }); }
+    }
+
     [HttpPost]
     public async Task<ActionResult> Create(CreateCountingStationRequest request, CancellationToken cancellationToken)
     {
@@ -41,3 +68,5 @@ public sealed class CountingStationsController(ElectionDbContext dbContext, Modu
 
 public sealed record CreateCountingStationRequest(string Code, string Name, Guid RegionId);
 public sealed record AssignCountingStationStaffRequest(Guid UserId);
+public sealed record CountingStationCursor(string Code, Guid Id);
+internal sealed record CountingStationCursorRow(Guid Id, string Code, string Name, Guid RegionId, bool IsActive);
diff --git a/src/ElectionSystem.Api/Controllers/VotersController.cs b/src/ElectionSystem.Api/Controllers/VotersController.cs
index 1e20d8d..867e7bd 100644
--- a/src/ElectionSystem.Api/Controllers/VotersController.cs
+++ b/src/ElectionSystem.Api/Controllers/VotersController.cs
@@ -8,7 +8,7 @@ using Microsoft.EntityFrameworkCore;
 namespace ElectionSystem.Api.Controllers;
 
 [Route("api/admin/voters")]
-public sealed class VotersController(ElectionDbContext dbContext, Modules.Organization.RegionScopeService scopeService, VoterImportService importService) : AdministrationControllerBase(scopeService)
+public sealed class VotersController(ElectionDbContext dbContext, Modules.Organization.RegionScopeService scopeService, Modules.Organization.RegionCascadeFilterService cascadeFilterService, VoterImportService importService) : AdministrationControllerBase(scopeService)
 {
     [HttpGet]
     public async Task<ActionResult<PagedResult<object>>> List([FromQuery] Guid? regionId, [FromQuery] VoterStatus? status, [FromQuery] string? keyword, [FromQuery] int page = 1, [FromQuery] int pageSize = 50, CancellationToken cancellationToken = default)
@@ -24,6 +24,34 @@ public sealed class VotersController(ElectionDbContext dbContext, Modules.Organi
         return Ok(new PagedResult<object>(items, page, pageSize, total));
     }
 
+    [HttpGet("cursor")]
+    public async Task<ActionResult<CursorPagedResult<object>>> ListCursor(
+        [FromQuery] Guid? provinceId, [FromQuery] Guid? cityId, [FromQuery] Guid? districtId, [FromQuery] Guid? townshipId,
+        [FromQuery] VoterStatus? status, [FromQuery] string? keyword, [FromQuery] string? cursor, [FromQuery] int pageSize = 50,
+        CancellationToken cancellationToken = default)
+    {
+        pageSize = Math.Clamp(pageSize, 1, 100);
+        if (!CursorToken.TryDecode<VoterCursor>(cursor, out var token)) return BadRequest(new { code = "invalid_cursor", message = "分页游标无效，请重新查询。" });
+        try
+        {
+            var managed = await ScopeService.GetManagedRegionIdsAsync(ActorId, cancellationToken);
+            var regions = await cascadeFilterService.ResolveAsync(managed, new(provinceId, cityId, districtId, townshipId), cancellationToken);
+            var query = dbContext.Voters.Where(x => regions.Contains(x.RegionId));
+            if (status.HasValue) query = query.Where(x => x.Status == status);
+            if (!string.IsNullOrWhiteSpace(keyword)) query = query.Where(x => x.VoterNumber.Contains(keyword) || x.DisplayName.Contains(keyword));
+            if (token is not null) query = query.Where(x => string.Compare(x.DisplayName, token.DisplayName) > 0 || (x.DisplayName == token.DisplayName && x.Id.CompareTo(token.Id) > 0));
+            var rows = await query.OrderBy(x => x.DisplayName).ThenBy(x => x.Id).Take(pageSize + 1)
+                .Select(x => new VoterCursorRow(x.Id, x.VoterNumber, x.DisplayName, x.RegionId, x.Status, x.DisabledReason, x.UpdatedAtUtc)).ToListAsync(cancellationToken);
+            var hasMore = rows.Count > pageSize;
+            if (hasMore) rows.RemoveAt(rows.Count - 1);
+            var regionNames = await dbContext.AdministrativeRegions.Where(x => rows.Select(y => y.RegionId).Contains(x.Id)).ToDictionaryAsync(x => x.Id, x => x.Name, cancellationToken);
+            var items = rows.Select(x => (object)new { x.Id, x.VoterNumber, x.DisplayName, x.RegionId, RegionName = regionNames.GetValueOrDefault(x.RegionId, "—"), x.Status, x.DisabledReason, x.UpdatedAtUtc }).ToList();
+            var next = hasMore && rows.Count > 0 ? CursorToken.Encode(new VoterCursor(rows[^1].DisplayName, rows[^1].Id)) : null;
+            return Ok(new CursorPagedResult<object>(items, next, hasMore, pageSize));
+        }
+        catch (ArgumentException exception) { return BadRequest(new { code = "invalid_region_filter", message = exception.Message }); }
+    }
+
     [HttpPost]
     public async Task<ActionResult> Create(CreateVoterRequest request, CancellationToken cancellationToken)
     {
@@ -61,3 +89,5 @@ public sealed class VotersController(ElectionDbContext dbContext, Modules.Organi
 
 public sealed record CreateVoterRequest(string VoterNumber, string DisplayName, Guid RegionId);
 public sealed record SetVoterStatusRequest(VoterStatus Status, string? Reason);
+public sealed record VoterCursor(string DisplayName, Guid Id);
+internal sealed record VoterCursorRow(Guid Id, string VoterNumber, string DisplayName, Guid RegionId, VoterStatus Status, string? DisabledReason, DateTime UpdatedAtUtc);
diff --git a/src/ElectionSystem.Api/Modules/Organization/RegionCascadeFilterService.cs b/src/ElectionSystem.Api/Modules/Organization/RegionCascadeFilterService.cs
new file mode 100644
index 0000000..38969a5
--- /dev/null
+++ b/src/ElectionSystem.Api/Modules/Organization/RegionCascadeFilterService.cs
@@ -0,0 +1,60 @@
+using ElectionSystem.Api.Infrastructure.Persistence;
+using ElectionSystem.Api.Modules.Organization.Domain;
+using Microsoft.EntityFrameworkCore;
+
+namespace ElectionSystem.Api.Modules.Organization;
+
+public sealed record AdministrativeRegionFilter(Guid? ProvinceId, Guid? CityId, Guid? DistrictId, Guid? TownshipId);
+
+/// <summary>Validates province-to-township selections and returns the selected subtree intersected with the caller scope.</summary>
+public sealed class RegionCascadeFilterService(ElectionDbContext dbContext)
+{
+    public async Task<HashSet<Guid>> ResolveAsync(HashSet<Guid> managedRegionIds, AdministrativeRegionFilter filter, CancellationToken cancellationToken)
+    {
+        if (managedRegionIds.Count == 0) return [];
+
+        var regions = await dbContext.AdministrativeRegions
+            .Where(x => x.IsActive)
+            .Select(x => new RegionNode(x.Id, x.ParentId, x.Level))
+            .ToListAsync(cancellationToken);
+        var byId = regions.ToDictionary(x => x.Id);
+        Validate(filter.ProvinceId, AdministrativeRegionLevel.Province, byId, managedRegionIds);
+        Validate(filter.CityId, AdministrativeRegionLevel.City, byId, managedRegionIds);
+        Validate(filter.DistrictId, AdministrativeRegionLevel.District, byId, managedRegionIds);
+        Validate(filter.TownshipId, AdministrativeRegionLevel.Township, byId, managedRegionIds);
+        ValidateParent(filter.ProvinceId, filter.CityId, byId);
+        ValidateParent(filter.CityId, filter.DistrictId, byId);
+        ValidateParent(filter.DistrictId, filter.TownshipId, byId);
+
+        var selectedId = filter.TownshipId ?? filter.DistrictId ?? filter.CityId ?? filter.ProvinceId;
+        if (!selectedId.HasValue) return managedRegionIds;
+
+        var children = regions.Where(x => x.ParentId.HasValue)
+            .GroupBy(x => x.ParentId!.Value)
+            .ToDictionary(x => x.Key, x => x.Select(y => y.Id).ToArray());
+        var subtree = new HashSet<Guid> { selectedId.Value };
+        var queue = new Queue<Guid>(subtree);
+        while (queue.TryDequeue(out var parentId) && children.TryGetValue(parentId, out var childIds))
+            foreach (var childId in childIds)
+                if (subtree.Add(childId)) queue.Enqueue(childId);
+
+        subtree.IntersectWith(managedRegionIds);
+        return subtree;
+    }
+
+    private static void Validate(Guid? id, AdministrativeRegionLevel level, IReadOnlyDictionary<Guid, RegionNode> regions, IReadOnlySet<Guid> managed)
+    {
+        if (!id.HasValue) return;
+        if (!managed.Contains(id.Value) || !regions.TryGetValue(id.Value, out var region) || region.Level != level)
+            throw new ArgumentException("行政区划筛选无效或超出当前管理范围。");
+    }
+
+    private static void ValidateParent(Guid? parentId, Guid? childId, IReadOnlyDictionary<Guid, RegionNode> regions)
+    {
+        if (!parentId.HasValue || !childId.HasValue) return;
+        if (!regions.TryGetValue(childId.Value, out var child) || child.ParentId != parentId)
+            throw new ArgumentException("行政区划筛选层级不匹配。");
+    }
+
+    private sealed record RegionNode(Guid Id, Guid? ParentId, AdministrativeRegionLevel Level);
+}
diff --git a/src/ElectionSystem.Api/Program.cs b/src/ElectionSystem.Api/Program.cs
index b28da62..e637b0a 100644
--- a/src/ElectionSystem.Api/Program.cs
+++ b/src/ElectionSystem.Api/Program.cs
@@ -31,6 +31,7 @@ builder.Services.AddExceptionHandler<GlobalExceptionHandler>();
 builder.Services.AddHttpContextAccessor();
 builder.Services.AddScoped<AuditSaveChangesInterceptor>();
 builder.Services.AddScoped<RegionScopeService>();
+builder.Services.AddScoped<RegionCascadeFilterService>();
 builder.Services.AddScoped<AreaCityCatalogImportService>();
 builder.Services.AddScoped<VoterImportService>();
 builder.Services.AddMemoryCache();
diff --git a/src/ElectionSystem.Api/wwwroot/css/site.css b/src/ElectionSystem.Api/wwwroot/css/site.css
index 856290b..d2c39b3 100644
--- a/src/ElectionSystem.Api/wwwroot/css/site.css
+++ b/src/ElectionSystem.Api/wwwroot/css/site.css
@@ -74,3 +74,4 @@ a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid
 .login-page { display: grid; min-height: 100vh; place-items: center; padding: 1.5rem; background: linear-gradient(135deg, #e5eff6 0%, #f4f7fa 55%, #dce9f2 100%); }.login-card { width: min(100%, 27rem); padding: 2.25rem; background: #fff; border-top: .3rem solid #1769aa; box-shadow: 0 1.4rem 3rem rgba(22, 58, 89, .14); }.login-card h1 { margin: 0; font-family: "Noto Serif SC", SimSun, serif; font-size: 2rem; }.login-card > p:not(.eyebrow) { color: #617487; line-height: 1.7; }.login-form { display: grid; gap: 1rem; margin-top: 1.5rem; }.login-form label { display: grid; gap: .4rem; color: #405769; font-size: .86rem; font-weight: 750; }.login-form input:not([type="checkbox"]) { padding: .68rem; border: 1px solid #b9c8d5; font: inherit; }.login-check { display: flex !important; grid-template-columns: auto 1fr; align-items: center; gap: .5rem !important; font-weight: 500 !important; }.login-error { color: #992f2f; font-size: .88rem; }
 .management-document { display: grid; grid-template-rows: auto 1fr auto; min-height: 100vh; background: #eef2f5; }.management-header { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 4.25rem; padding: 0 1.5rem; color: #fff; background: #163a59; }.management-header__brand { display: flex; align-items: baseline; gap: .55rem; color: #fff; text-decoration: none; }.management-header__brand span { padding: .16rem .38rem; color: #163a59; background: #d4e7f5; font-weight: 850; letter-spacing: .08em; }.management-header__brand strong { letter-spacing: .08em; }.management-header__nav { display: flex; align-items: center; gap: 1rem; }.management-header__nav a, .management-header__nav button { color: #d4e7f5; background: transparent; border: 0; font: inherit; font-size: .85rem; text-decoration: none; cursor: pointer; }.management-header__nav form { margin: 0; }.management-footer { padding: 1rem 1.5rem; color: #b8c7d2; background: #23313f; font-size: .78rem; }.management-document .admin-razor-page { width: min(100%, 82rem); margin: 0 auto; padding: clamp(1.5rem, 4vw, 3rem); }.management-document .admin-razor-page > h1 { margin: 0; font-family: "Noto Serif SC", SimSun, serif; font-size: clamp(1.8rem, 3.4vw, 2.6rem); }.management-document .admin-razor-page > p:not(.eyebrow) { max-width: 48rem; color: #617487; line-height: 1.7; }.logout-page { width: min(100% - 2rem, 34rem); margin: 4rem auto; padding: 1.5rem; background: #fff; border-top: .25rem solid #1769aa; }
 @media (max-width: 40rem) { .management-header { align-items: flex-start; flex-direction: column; justify-content: center; padding: .9rem 1rem; }.management-header__nav { width: 100%; justify-content: space-between; }.management-footer { padding: 1rem; }.management-document .admin-razor-page { padding: 1.25rem 1rem; } }
+.admin-filter--regions { align-items: end; }.admin-pagination { display: flex; align-items: center; justify-content: flex-end; gap: 1rem; margin-top: 1rem; color: #596579; font-size: .9rem; }.admin-pagination button:disabled { cursor: not-allowed; opacity: .48; }
diff --git a/tests/ElectionSystem.Api.Tests/PersistenceModelTests.cs b/tests/ElectionSystem.Api.Tests/PersistenceModelTests.cs
index 4242879..2907d23 100644
--- a/tests/ElectionSystem.Api.Tests/PersistenceModelTests.cs
+++ b/tests/ElectionSystem.Api.Tests/PersistenceModelTests.cs
@@ -1,5 +1,6 @@
 using ElectionSystem.Api.Infrastructure.Auditing;
 using ElectionSystem.Api.Infrastructure.Persistence;
+using ElectionSystem.Api.Common.Pagination;
 using ElectionSystem.Api.Modules.Identity.Domain;
 using ElectionSystem.Api.Modules.Organization;
 using ElectionSystem.Api.Modules.Organization.Domain;
@@ -86,4 +87,45 @@ public sealed class PersistenceModelTests
         Assert.NotEqual(PasswordVerificationResult.Failed, hasher.VerifyHashedPassword(user, hash, "Correct-Horse-7!Battery"));
         Assert.Equal(PasswordVerificationResult.Failed, hasher.VerifyHashedPassword(user, hash, "wrong-password"));
     }
+
+    [Fact]
+    public void Cursor_token_round_trips_and_rejects_malformed_values()
+    {
+        var cursor = new TestCursor("张三", Guid.NewGuid());
+
+        var encoded = CursorToken.Encode(cursor);
+
+        Assert.True(CursorToken.TryDecode<TestCursor>(encoded, out var decoded));
+        Assert.Equal(cursor, decoded);
+        Assert.False(CursorToken.TryDecode<TestCursor>("not-a-cursor", out _));
+    }
+
+    [Fact]
+    public async Task Four_level_filter_returns_selected_subtree_and_rejects_cross_branch_selection()
+    {
+        var options = new DbContextOptionsBuilder<ElectionDbContext>().UseInMemoryDatabase(Guid.NewGuid().ToString()).Options;
+        await using var context = new ElectionDbContext(options);
+        var province = Region("11", "省", AdministrativeRegionLevel.Province);
+        var city = Region("1101", "市", AdministrativeRegionLevel.City, province.Id);
+        var district = Region("110101", "区", AdministrativeRegionLevel.District, city.Id);
+        var township = Region("110101001", "镇", AdministrativeRegionLevel.Township, district.Id);
+        var village = Region("110101001001", "村", AdministrativeRegionLevel.Village, township.Id);
+        var otherCity = Region("1201", "另一市", AdministrativeRegionLevel.City, province.Id);
+        context.AddRange(province, city, district, township, village, otherCity);
+        await context.SaveChangesAsync();
+        var service = new RegionCascadeFilterService(context);
+        var scope = new HashSet<Guid> { province.Id, city.Id, district.Id, township.Id, village.Id, otherCity.Id };
+
+        var result = await service.ResolveAsync(scope, new AdministrativeRegionFilter(province.Id, city.Id, district.Id, township.Id), CancellationToken.None);
+
+        Assert.Equal(new[] { township.Id, village.Id }.Order(), result.Order());
+        await Assert.ThrowsAsync<ArgumentException>(() => service.ResolveAsync(scope, new AdministrativeRegionFilter(province.Id, otherCity.Id, district.Id, null), CancellationToken.None));
+    }
+
+    private static AdministrativeRegion Region(string code, string name, AdministrativeRegionLevel level, Guid? parentId = null) => new()
+    {
+        Code = code, Name = name, Level = level, ParentId = parentId, Source = "test", SourceVersion = "test"
+    };
+
+    private sealed record TestCursor(string Name, Guid Id);
 }