diff --git a/AGENTS.md b/AGENTS.md
index 66b1930..a0b5aef 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -34,6 +34,12 @@
 - 非 `testing` 环境关账受 `AGENT_SETTLEMENT_ALLOW_PRODUCTION_CLOSE`（默认 `true`）控制；预发可设为 `false` 门禁。
 - 占成账单聚合必须读注单**快照**（`share_snapshot`），禁止按当前 `agent_profiles` 重算历史。
 
+## 接入站点与超管
+
+- 超管身份：`admin_users.is_super_admin`；**禁止**经 `admin_user_site_roles` 绑站；全库仅一名（DB partial unique index）。
+- 零站点：`admin_sites` 可为 0；`defaultAdminSiteId()` 无站返回 null；超管仍可登录；需站点的写操作用 `requireDefaultAdminSiteId()` 抛 `no_integration_site`。
+- 删接入站：DELETE API/UI；默认站亦可删（含最后一个）；仅删除仅绑 `site_admin_{code}` 的自动账号，**不得**删超管。
+
 ## Learned Workspace Facts
 
 - 期号 `close_time` / `draw_time` 以 UTC 存储与比较；后台展示转浏览器本地时区，创建/编辑表单提交前须转回 UTC。
diff --git a/app/Console/Commands/PurgeAgentDataCommand.php b/app/Console/Commands/PurgeAgentDataCommand.php
new file mode 100644
index 0000000..cb61789
--- /dev/null
+++ b/app/Console/Commands/PurgeAgentDataCommand.php
@@ -0,0 +1,147 @@
+<?php
+
+namespace App\Console\Commands;
+
+use App\Models\AgentNode;
+use App\Services\Agent\AgentNodeService;
+use Illuminate\Console\Command;
+use Illuminate\Support\Facades\DB;
+
+/**
+ * 清空信用占成盘代理业务数据，并删除所有非根代理节点（保留各站点 depth=0 根节点）。
+ *
+ * 不删：期号、注单、钱包玩家、站点财务账号。
+ */
+final class PurgeAgentDataCommand extends Command
+{
+    protected $signature = 'lottery:purge-agent-data
+                            {--dry-run : 只预览，不写入}
+                            {--force : 跳过交互确认（危险）}';
+
+    protected $description = '清空代理账期/授信流水，删除全部非根代理（保留站点根节点）';
+
+    public function handle(AgentNodeService $agentNodeService): int
+    {
+        $dryRun = (bool) $this->option('dry-run');
+        $force = (bool) $this->option('force');
+
+        $connection = (string) config('database.default');
+        $database = (string) config('database.connections.'.$connection.'.database');
+        $environment = (string) config('app.env');
+
+        $nonRootAgents = AgentNode::query()
+            ->where('depth', '>', 0)
+            ->orderByDesc('depth')
+            ->orderByDesc('id')
+            ->get();
+
+        $nonRootIds = $nonRootAgents->pluck('id')->map(static fn ($id): int => (int) $id)->all();
+
+        $rootBySite = DB::table('agent_nodes')
+            ->where('depth', 0)
+            ->get(['id', 'admin_site_id'])
+            ->groupBy('admin_site_id')
+            ->map(static fn ($rows) => (int) $rows->first()->id);
+
+        $playersToReassign = $nonRootIds === []
+            ? 0
+            : (int) DB::table('players')->whereIn('agent_node_id', $nonRootIds)->count();
+
+        $metrics = [
+            ['Database', $connection.' / '.$database],
+            ['Environment', $environment],
+            ['Non-root agents', (string) count($nonRootIds)],
+            ['Players to reassign to root', (string) $playersToReassign],
+            ['settlement_periods', (string) DB::table('settlement_periods')->count()],
+            ['settlement_bills', (string) DB::table('settlement_bills')->count()],
+            ['payment_records', (string) DB::table('payment_records')->count()],
+            ['settlement_adjustments', (string) DB::table('settlement_adjustments')->count()],
+            ['rebate_records', (string) DB::table('rebate_records')->count()],
+            ['share_ledger', (string) DB::table('share_ledger')->count()],
+            ['credit_ledger', (string) DB::table('credit_ledger')->count()],
+            ['agent_delegation_grants', (string) DB::table('agent_delegation_grants')->count()],
+        ];
+
+        $this->table(['Metric', 'Value'], $metrics);
+
+        if ($nonRootAgents->isNotEmpty()) {
+            $this->line('Non-root agents to delete:');
+            foreach ($nonRootAgents as $node) {
+                $this->line(sprintf(
+                    '  - #%d depth=%d %s (%s)',
+                    (int) $node->id,
+                    (int) $node->depth,
+                    (string) $node->code,
+                    (string) $node->name,
+                ));
+            }
+        }
+
+        if ($dryRun) {
+            $this->info('Dry run only — no changes written.');
+
+            return self::SUCCESS;
+        }
+
+        if (! $force && ! $this->confirm('This permanently deletes agent settlement data and non-root agents. Continue?', false)) {
+            $this->warn('Aborted.');
+
+            return self::FAILURE;
+        }
+
+        DB::transaction(function () use ($agentNodeService, $nonRootAgents, $nonRootIds, $rootBySite): void {
+            DB::table('settlement_adjustments')->delete();
+            DB::table('payment_records')->delete();
+            DB::table('rebate_allocations')->delete();
+            DB::table('rebate_records')->delete();
+            DB::table('share_ledger')->delete();
+            DB::table('settlement_bills')->delete();
+            DB::table('settlement_periods')->delete();
+            DB::table('credit_ledger')->delete();
+
+            DB::table('player_credit_accounts')->update([
+                'used_credit' => 0,
+                'frozen_credit' => 0,
+                'updated_at' => now(),
+            ]);
+
+            DB::table('agent_profiles')->update([
+                'allocated_credit' => 0,
+                'used_credit' => 0,
+                'updated_at' => now(),
+            ]);
+
+            if ($nonRootIds !== []) {
+                DB::table('agent_delegation_grants')
+                    ->whereIn('parent_agent_id', $nonRootIds)
+                    ->orWhereIn('child_agent_id', $nonRootIds)
+                    ->delete();
+
+                $players = DB::table('players')
+                    ->whereIn('agent_node_id', $nonRootIds)
+                    ->get(['id', 'agent_node_id', 'site_code']);
+
+                foreach ($players as $player) {
+                    $agentNodeId = (int) $player->agent_node_id;
+                    $siteId = (int) (DB::table('agent_nodes')->where('id', $agentNodeId)->value('admin_site_id') ?? 0);
+                    $rootId = $rootBySite->get($siteId);
+                    if ($rootId === null) {
+                        continue;
+                    }
+
+                    DB::table('players')
+                        ->where('id', (int) $player->id)
+                        ->update(['agent_node_id' => $rootId]);
+                }
+
+                foreach ($nonRootAgents as $node) {
+                    $agentNodeService->destroy($node);
+                }
+            }
+        });
+
+        $this->info('Agent settlement data cleared; non-root agents removed. Root nodes kept.');
+
+        return self::SUCCESS;
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/Admin/Integration/AdminIntegrationSiteDestroyController.php b/app/Http/Controllers/Api/V1/Admin/Integration/AdminIntegrationSiteDestroyController.php
new file mode 100644
index 0000000..2004501
--- /dev/null
+++ b/app/Http/Controllers/Api/V1/Admin/Integration/AdminIntegrationSiteDestroyController.php
@@ -0,0 +1,49 @@
+<?php
+
+namespace App\Http\Controllers\Api\V1\Admin\Integration;
+
+use App\Models\AdminSite;
+use App\Support\ApiMessage;
+use App\Support\ApiResponse;
+use App\Lottery\ErrorCode;
+use Illuminate\Http\Request;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
+use App\Services\AuditLogger;
+use App\Services\Integration\IntegrationSiteService;
+use App\Support\AdminIntegrationSiteAccess;
+use App\Support\AdminIntegrationSitePresenter;
+use App\Http\Middleware\RecordAdminApiAudit;
+
+final class AdminIntegrationSiteDestroyController extends Controller
+{
+    public function __invoke(
+        Request $request,
+        AdminSite $admin_site,
+        IntegrationSiteService $service,
+    ): JsonResponse {
+        $admin = $request->lotteryAdmin();
+        abort_if($admin === null, 401);
+
+        if (! AdminIntegrationSiteAccess::canAccess($admin, $admin_site)) {
+            return ApiMessage::errorResponse($request, 'admin.site_delete_denied', ErrorCode::AdminForbidden->value, null, 403);
+        }
+
+        $before = AdminIntegrationSitePresenter::detail($admin_site);
+        $service->destroy($admin_site);
+
+        AuditLogger::recordForAdmin(
+            $admin,
+            $request,
+            moduleCode: 'integration',
+            actionCode: 'destroy',
+            targetType: 'admin_site',
+            targetId: (string) $before['id'],
+            beforeJson: $before,
+            afterJson: null,
+        );
+        $request->attributes->set(RecordAdminApiAudit::ATTRIBUTE_AUDIT_RECORDED, true);
+
+        return ApiResponse::success(null);
+    }
+}
diff --git a/app/Http/Controllers/Api/V1/Admin/User/AdminUserDestroyController.php b/app/Http/Controllers/Api/V1/Admin/User/AdminUserDestroyController.php
index 4b1cc2a..32aa838 100644
--- a/app/Http/Controllers/Api/V1/Admin/User/AdminUserDestroyController.php
+++ b/app/Http/Controllers/Api/V1/Admin/User/AdminUserDestroyController.php
@@ -26,11 +26,10 @@ final class AdminUserDestroyController extends Controller
             return ApiMessage::errorResponse($request, 'admin.user_cannot_delete_self', ErrorCode::ValidationFailed->value, null, 422);
         }
 
-        $admin_user->load('roles');
         if ($admin_user->isSuperAdmin()) {
             $hasOther = AdminUser::query()
                 ->whereKeyNot($admin_user->getKey())
-                ->whereHas('roles', static fn ($q) => $q->where('admin_roles.slug', AdminUser::ROLE_SUPER_ADMIN))
+                ->where('is_super_admin', true)
                 ->exists();
             if (! $hasOther) {
                 return ApiMessage::errorResponse($request, 'admin.user_cannot_delete_last_super_admin', ErrorCode::ValidationFailed->value, null, 422);
diff --git a/app/Http/Controllers/Api/V1/Admin/User/AdminUserPermissionSyncController.php b/app/Http/Controllers/Api/V1/Admin/User/AdminUserPermissionSyncController.php
index 5f8a1d9..fccc2da 100644
--- a/app/Http/Controllers/Api/V1/Admin/User/AdminUserPermissionSyncController.php
+++ b/app/Http/Controllers/Api/V1/Admin/User/AdminUserPermissionSyncController.php
@@ -25,7 +25,7 @@ final class AdminUserPermissionSyncController extends Controller
             (array) ($input['permissions'] ?? $input['permission_slugs'] ?? []),
             static fn ($v) => is_string($v) && $v !== '',
         )));
-        $siteId = AdminUser::defaultAdminSiteId();
+        $siteId = AdminUser::requireDefaultAdminSiteId();
 
         $codes = [];
         foreach ($slugs as $slug) {
diff --git a/app/Http/Requests/Admin/AdminAgentLineStoreRequest.php b/app/Http/Requests/Admin/AdminAgentLineStoreRequest.php
index 7e116a8..4a5cce3 100644
--- a/app/Http/Requests/Admin/AdminAgentLineStoreRequest.php
+++ b/app/Http/Requests/Admin/AdminAgentLineStoreRequest.php
@@ -40,7 +40,7 @@ final class AdminAgentLineStoreRequest extends ApiFormRequest
     {
         return [
             'site_code' => ['required', 'string', 'max:64', 'regex:/^[a-z0-9][a-z0-9_-]*$/', Rule::exists('admin_sites', 'code')],
-            'code' => ['required', 'string', 'max:64', 'regex:/^[a-z0-9][a-z0-9_-]*$/', Rule::unique('agent_nodes', 'code')],
+            'code' => ['sometimes', 'nullable', 'string', 'max:64', 'regex:/^[a-z0-9][a-z0-9_-]*$/', Rule::unique('agent_nodes', 'code')],
             'name' => ['required', 'string', 'max:128'],
             'username' => ['required', 'string', 'max:64', Rule::unique('admin_users', 'username')],
             'password' => ['required', 'string', 'min:8', 'max:128'],
diff --git a/app/Models/AdminUser.php b/app/Models/AdminUser.php
index f13dff0..183b0ba 100644
--- a/app/Models/AdminUser.php
+++ b/app/Models/AdminUser.php
@@ -29,6 +29,7 @@ final class AdminUser extends Authenticatable
         'email',
         'password',
         'status',
+        'is_super_admin',
     ];
 
     protected $hidden = [
@@ -42,27 +43,40 @@ final class AdminUser extends Authenticatable
             'email_verified_at' => 'datetime',
             'last_login_at' => 'datetime',
             'password' => 'hashed',
+            'is_super_admin' => 'boolean',
         ];
     }
 
-    public static function defaultAdminSiteId(): int
+    public static function defaultAdminSiteId(): ?int
     {
         static $cached = null;
-        if ($cached !== null) {
+        static $resolved = false;
+        if ($resolved) {
             return $cached;
         }
+        $resolved = true;
+
         $id = DB::table('admin_sites')->where('is_default', true)->value('id');
         if ($id === null) {
             $id = DB::table('admin_sites')->orderBy('id')->value('id');
         }
-        if ($id === null) {
-            throw new \RuntimeException('No admin_sites row found.');
-        }
-        $cached = (int) $id;
+        $cached = $id !== null ? (int) $id : null;
 
         return $cached;
     }
 
+    public static function requireDefaultAdminSiteId(): int
+    {
+        $siteId = self::requireDefaultAdminSiteId();
+        if ($siteId === null) {
+            throw ValidationException::withMessages([
+                'admin_site_id' => [__('admin.no_integration_site')],
+            ]);
+        }
+
+        return $siteId;
+    }
+
     /**
      * 用户在各站点上的角色（多站点 RBAC）。
      *
@@ -188,7 +202,7 @@ final class AdminUser extends Authenticatable
 
     public function syncRoleSlugsForDefaultSite(array $slugs): void
     {
-        $siteId = self::defaultAdminSiteId();
+        $siteId = self::requireDefaultAdminSiteId();
         $slugs = array_values(array_unique($slugs));
         $roleIds = DB::table('admin_roles')
             ->whereIn('slug', $slugs)
@@ -225,7 +239,7 @@ final class AdminUser extends Authenticatable
      */
     public function syncSystemRoleSlugs(array $slugs): void
     {
-        $this->syncSystemRoleSlugsForSite(self::defaultAdminSiteId(), $slugs);
+        $this->syncSystemRoleSlugsForSite(self::requireDefaultAdminSiteId(), $slugs);
     }
 
     /**
@@ -236,6 +250,8 @@ final class AdminUser extends Authenticatable
     public function syncSystemRoleSlugsForSite(int $siteId, array $slugs): void
     {
         $slugs = array_values(array_unique($slugs));
+        \App\Support\SuperAdminAccount::assertNotSiteRoleAssignment($slugs);
+
         $roleIds = DB::table('admin_roles')
             ->where('scope_type', AdminRole::SCOPE_SYSTEM)
             ->whereIn('slug', $slugs)
@@ -269,11 +285,7 @@ final class AdminUser extends Authenticatable
 
     public function isSuperAdmin(): bool
     {
-        if ($this->relationLoaded('roles')) {
-            return $this->roles->contains('slug', self::ROLE_SUPER_ADMIN);
-        }
-
-        return $this->roles()->where('admin_roles.slug', self::ROLE_SUPER_ADMIN)->exists();
+        return (bool) $this->is_super_admin;
     }
 
     public function primaryAgentNodeId(): ?int
@@ -348,16 +360,25 @@ final class AdminUser extends Authenticatable
      */
     public function directMenuActionPermissionCodes(): array
     {
+        if ($this->isSuperAdmin()) {
+            return [];
+        }
+
         $siteId = self::defaultAdminSiteId();
-        $rows = DB::table('admin_user_menu_actions as uma')
+        $query = DB::table('admin_user_menu_actions as uma')
             ->join('admin_menu_actions as ma', 'ma.id', '=', 'uma.menu_action_id')
             ->where('uma.admin_user_id', $this->id)
-            ->where(function ($q) use ($siteId): void {
+            ->where('ma.status', 1);
+
+        if ($siteId !== null) {
+            $query->where(function ($q) use ($siteId): void {
                 $q->where('uma.site_id', $siteId)->orWhereNull('uma.site_id');
-            })
-            ->where('ma.status', 1)
-            ->pluck('ma.permission_code')
-            ->all();
+            });
+        } else {
+            $query->whereNull('uma.site_id');
+        }
+
+        $rows = $query->pluck('ma.permission_code')->all();
 
         $out = [];
         foreach ($rows as $code) {
@@ -485,11 +506,17 @@ final class AdminUser extends Authenticatable
     {
         $this->loadMissing('roles');
 
-        return $this->roles
+        $slugs = $this->roles
             ->pluck('slug')
             ->filter(static fn ($slug): bool => is_string($slug) && $slug !== '')
             ->unique()
             ->values()
             ->all();
+
+        if ($this->isSuperAdmin()) {
+            $slugs = array_values(array_unique(array_merge([self::ROLE_SUPER_ADMIN], $slugs)));
+        }
+
+        return $slugs;
     }
 }
diff --git a/app/Services/Admin/AdminDashboardSnapshotBuilder.php b/app/Services/Admin/AdminDashboardSnapshotBuilder.php
index aaab989..dbf002b 100644
--- a/app/Services/Admin/AdminDashboardSnapshotBuilder.php
+++ b/app/Services/Admin/AdminDashboardSnapshotBuilder.php
@@ -17,6 +17,7 @@ use App\Support\AdminDataScope;
 use App\Support\AdminScopeContext;
 use App\Support\AdminAgentScope;
 use App\Support\AdminScopeContextResolver;
+use App\Support\SitePlatformRole;
 use Illuminate\Database\Eloquent\Builder as EloquentBuilder;
 
 /**
@@ -30,6 +31,7 @@ final class AdminDashboardSnapshotBuilder
         private readonly DrawHallSnapshotBuilder $hallSnapshot,
         private readonly AdminReportQueryService $reportQuery,
         private readonly AgentDashboardOverviewBuilder $agentOverview,
+        private readonly SiteDashboardOverviewBuilder $siteOverview,
     ) {}
 
     /** @return array<string, mixed> */
@@ -57,10 +59,13 @@ final class AdminDashboardSnapshotBuilder
                 'wallet_transfer_view' => $canWallet,
             ],
             'agent_overview' => null,
+            'site_overview' => null,
         ];
 
         if ($admin->primaryAgentNode() !== null) {
             $out['agent_overview'] = $this->agentOverview->build($admin);
+        } elseif (SitePlatformRole::userHasSiteAdminRole($admin)) {
+            $out['site_overview'] = $this->siteOverview->build($admin, $scope);
         }
 
         if ($canDraw) {
diff --git a/app/Services/Admin/SiteDashboardOverviewBuilder.php b/app/Services/Admin/SiteDashboardOverviewBuilder.php
new file mode 100644
index 0000000..99d89ec
--- /dev/null
+++ b/app/Services/Admin/SiteDashboardOverviewBuilder.php
@@ -0,0 +1,137 @@
+<?php
+
+namespace App\Services\Admin;
+
+use App\Models\AdminSite;
+use App\Models\AdminUser;
+use App\Models\AgentNode;
+use App\Models\Player;
+use App\Support\AdminScopeContext;
+use App\Support\AdminScopeContextResolver;
+use Carbon\Carbon;
+use Illuminate\Support\Facades\DB;
+
+/** 站点管理员仪表盘：站点规模、今日/近 7 日经营、待结账单摘要。 */
+final class SiteDashboardOverviewBuilder
+{
+    public function __construct(
+        private readonly AdminReportQueryService $reportQuery,
+    ) {}
+
+    /**
+     * @return array<string, mixed>|null
+     */
+    public function build(AdminUser $admin, AdminScopeContext $scope): ?array
+    {
+        if (! $admin->hasPermissionCode('dashboard.view')) {
+            return null;
+        }
+
+        $site = $this->resolvePrimarySite($admin);
+        if ($site === null) {
+            return null;
+        }
+
+        $siteId = (int) $site->id;
+        $siteCode = (string) $site->code;
+        $agentNodeIds = AgentNode::query()
+            ->where('admin_site_id', $siteId)
+            ->pluck('id')
+            ->map(static fn ($id): int => (int) $id)
+            ->all();
+
+        $playerCount = (int) Player::query()->where('site_code', $siteCode)->count();
+        $today = now()->toDateString();
+        $sevenDayFrom = now()->subDays(6)->toDateString();
+        $scoped = AdminScopeContextResolver::fromValues(
+            $admin,
+            requestedSiteCode: $siteCode,
+        );
+        $todayTotals = $this->reportQuery->periodFinanceTotals($today, $today, $scoped);
+        $sevenDayTotals = $this->reportQuery->periodFinanceTotals($sevenDayFrom, $today, $scoped);
+        $currencyCode = $this->reportQuery->resolvePeriodCurrencyCode($today, $today, $scoped)
+            ?? $this->reportQuery->resolvePeriodCurrencyCode($sevenDayFrom, $today, $scoped);
+        $todayActivity = $this->todayActivityStats($siteCode, $today);
+        $pendingBills = $this->pendingBillStats($siteId);
+        $topAgentToday = $this->topAgentToday($scoped, $today);
+
+        return [
+            'admin_site_id' => $siteId,
+            'site_code' => $siteCode,
+            'site_name' => (string) $site->name,
+            'agent_count' => count($agentNodeIds),
+            'player_count' => $playerCount,
+            'active_player_count_today' => $todayActivity['player_count'],
+            'bet_order_count_today' => $todayActivity['order_count'],
+            'today_bet_minor' => $todayTotals['total_bet_minor'],
+            'today_payout_minor' => $todayTotals['total_payout_minor'],
+            'today_profit_minor' => $todayTotals['approx_house_gross_minor'],
+            'seven_day_bet_minor' => $sevenDayTotals['total_bet_minor'],
+            'seven_day_payout_minor' => $sevenDayTotals['total_payout_minor'],
+            'seven_day_profit_minor' => $sevenDayTotals['approx_house_gross_minor'],
+            'profit_scope' => 'house_gross',
+            'currency_code' => $currencyCode,
+            'pending_bill_count' => $pendingBills['count'],
+            'pending_unpaid_minor' => $pendingBills['unpaid_minor'],
+            'latest_bet_at' => $todayActivity['latest_bet_at'],
+            'top_agent_today' => $topAgentToday,
+        ];
+    }
+
+    private function resolvePrimarySite(AdminUser $admin): ?AdminSite
+    {
+        $siteIds = $admin->accessibleAdminSiteIds();
+        if ($siteIds === null || $siteIds === []) {
+            return null;
+        }
+
+        return AdminSite::query()
+            ->where('id', (int) $siteIds[0])
+            ->first();
+    }
+
+    /**
+     * @return array{player_count: int, order_count: int, latest_bet_at: ?string}
+     */
+    private function todayActivityStats(string $siteCode, string $today): array
+    {
+        $base = DB::table('ticket_orders as o')
+            ->join('players as p', 'p.id', '=', 'o.player_id')
+            ->where('p.site_code', $siteCode)
+            ->whereDate('o.created_at', $today);
+
+        $latestBetAt = (clone $base)->max('o.created_at');
+
+        return [
+            'player_count' => (int) (clone $base)->distinct('o.player_id')->count('o.player_id'),
+            'order_count' => (int) (clone $base)->count(),
+            'latest_bet_at' => $latestBetAt !== null ? Carbon::parse((string) $latestBetAt)->toIso8601String() : null,
+        ];
+    }
+
+    /**
+     * @return array{count: int, unpaid_minor: int}
+     */
+    private function pendingBillStats(int $siteId): array
+    {
+        $query = DB::table('settlement_bills as sb')
+            ->join('settlement_periods as sp', 'sp.id', '=', 'sb.settlement_period_id')
+            ->where('sp.admin_site_id', $siteId)
+            ->whereIn('sb.status', ['pending', 'pending_confirm', 'partial']);
+
+        return [
+            'count' => (int) $query->count(),
+            'unpaid_minor' => (int) $query->sum('sb.unpaid_amount'),
+        ];
+    }
+
+    /**
+     * @return array<string, mixed>|null
+     */
+    private function topAgentToday(AdminScopeContext $scope, string $today): ?array
+    {
+        $rows = $this->reportQuery->agentRankingRows($today, $today, null, 1, $scope);
+
+        return $rows[0] ?? null;
+    }
+}
diff --git a/app/Services/Agent/AgentSiteProvisioningService.php b/app/Services/Agent/AgentSiteProvisioningService.php
index 44e99e9..062dc0f 100644
--- a/app/Services/Agent/AgentSiteProvisioningService.php
+++ b/app/Services/Agent/AgentSiteProvisioningService.php
@@ -16,10 +16,33 @@ final class AgentSiteProvisioningService
         private readonly AgentProfileService $agentProfileService,
     ) {}
 
+    /**
+     * Generate a unique agent code based on site code and counter.
+     * Format: {site_code}-agent-{counter}
+     */
+    private function generateUniqueAgentCode(int $siteId): string
+    {
+        $site = AdminSite::query()->find($siteId);
+        if ($site === null) {
+            throw new \RuntimeException('Site not found');
+        }
+
+        $prefix = strtolower(trim($site->code));
+        $counter = 1;
+
+        while (true) {
+            $code = sprintf('%s-agent-%d', $prefix, $counter);
+            if (!AgentNode::query()->where('code', $code)->exists()) {
+                return $code;
+            }
+            $counter++;
+        }
+    }
+
     /**
      * 在已存在的接入站点上创建一级代理（根节点）及后台登录账号。
      *
-     * @param  array<string, mixed>  $payload  site_code, code, name, username, password, email?, status?, profile fields
+     * @param  array<string, mixed>  $payload  site_code, code?, name, username, password, email?, status?, profile fields
      * @return array{site: AdminSite, agent_node: AgentNode}
      */
     public function createRootAgent(AdminUser $actor, array $payload): array
@@ -32,10 +55,9 @@ final class AgentSiteProvisioningService
         $email = isset($payload['email']) ? trim((string) $payload['email']) : null;
         $status = (int) ($payload['status'] ?? 1);
 
-        if ($siteCode === '' || $code === '' || $name === '' || $username === '' || $password === '') {
+        if ($siteCode === '' || $name === '' || $username === '' || $password === '') {
             throw ValidationException::withMessages([
                 'site_code' => $siteCode === '' ? ['required'] : [],
-                'code' => $code === '' ? ['required'] : [],
                 'name' => $name === '' ? ['required'] : [],
                 'username' => $username === '' ? ['required'] : [],
                 'password' => $password === '' ? ['required'] : [],
@@ -47,8 +69,13 @@ final class AgentSiteProvisioningService
             throw ValidationException::withMessages(['site_code' => ['exists']]);
         }
 
-        if (AgentNode::query()->where('code', $code)->exists()) {
-            throw ValidationException::withMessages(['code' => ['unique']]);
+        // Auto-generate code if not provided
+        if ($code === '') {
+            $code = $this->generateUniqueAgentCode($site->id);
+        } else {
+            if (AgentNode::query()->where('code', $code)->exists()) {
+                throw ValidationException::withMessages(['code' => ['unique']]);
+            }
         }
 
         if (AdminUser::query()->where('username', $username)->exists()) {
diff --git a/app/Services/Integration/IntegrationSiteService.php b/app/Services/Integration/IntegrationSiteService.php
index 2e8f43c..23d80e8 100644
--- a/app/Services/Integration/IntegrationSiteService.php
+++ b/app/Services/Integration/IntegrationSiteService.php
@@ -5,26 +5,14 @@ namespace App\Services\Integration;
 use App\Models\AdminSite;
 use App\Models\AdminRole;
 use App\Models\AdminUser;
-use App\Support\AdminPermissionInheritance;
+use App\Models\Player;
+use App\Support\SitePlatformRole;
 use Illuminate\Support\Str;
 use Illuminate\Validation\ValidationException;
 use Illuminate\Support\Facades\DB;
 
 final class IntegrationSiteService
 {
-    /** @var list<string> */
-    private const SITE_ADMIN_PERMISSION_SLUGS = [
-        'prd.agent.manage',
-        'prd.agent.profile.manage',
-        'prd.agent.user.manage',
-        'prd.agent.role.manage',
-        'prd.users.manage',
-        'prd.tickets.view',
-        'prd.report.view',
-        'prd.settlement.agent.view',
-        'prd.settlement.agent.manage',
-    ];
-
     public function __construct(
         private readonly PartnerSiteConfigResolver $configResolver,
     ) {}
@@ -59,7 +47,7 @@ final class IntegrationSiteService
                 'wallet_api_key_encrypted' => encrypt($secrets['wallet_api_key']),
             ]);
 
-            $role = $this->createSiteAdminRole($site);
+            $role = SitePlatformRole::resolve();
             $adminUser = $this->createSiteAdminUser($site, $role, $adminAccount);
 
             return [
@@ -108,6 +96,79 @@ final class IntegrationSiteService
         return $site->fresh();
     }
 
+    /**
+     * @return array{site: AdminSite, secrets: array{sso_jwt_secret: string, wallet_api_key: string}}
+     */
+    public function destroy(AdminSite $site): void
+    {
+        $siteCode = (string) $site->code;
+        $siteId = (int) $site->id;
+        $siteAdminRoleId = SitePlatformRole::resolve()->id;
+
+        if (AdminSite::query()->count() <= 1) {
+            $fallbackSiteId = null;
+        } else {
+            $fallbackSiteId = (int) AdminSite::query()
+                ->where('id', '!=', $siteId)
+                ->orderBy('id')
+                ->value('id');
+        }
+
+        DB::transaction(function () use ($site, $siteCode, $siteId, $siteAdminRoleId, $fallbackSiteId): void {
+            $superRoleId = AdminRole::query()
+                ->where('slug', AdminUser::ROLE_SUPER_ADMIN)
+                ->value('id');
+
+            $platformBindings = DB::table('admin_user_site_roles')
+                ->where('site_id', $siteId)
+                ->when($siteAdminRoleId !== null, static fn ($query) => $query->where('role_id', '!=', $siteAdminRoleId))
+                ->when($superRoleId !== null, static fn ($query) => $query->where('role_id', '!=', $superRoleId))
+                ->get(['admin_user_id', 'role_id', 'granted_at']);
+
+            foreach ($platformBindings as $binding) {
+                if ($fallbackSiteId === null) {
+                    continue;
+                }
+
+                DB::table('admin_user_site_roles')->updateOrInsert(
+                    [
+                        'admin_user_id' => (int) $binding->admin_user_id,
+                        'site_id' => $fallbackSiteId,
+                        'role_id' => (int) $binding->role_id,
+                    ],
+                    ['granted_at' => $binding->granted_at ?? now()],
+                );
+            }
+
+            Player::query()->where('site_code', $siteCode)->delete();
+
+            if ($siteAdminRoleId !== null) {
+                $siteAdminUserIds = DB::table('admin_user_site_roles')
+                    ->where('site_id', $siteId)
+                    ->where('role_id', $siteAdminRoleId)
+                    ->pluck('admin_user_id');
+
+                foreach ($siteAdminUserIds as $userId) {
+                    $bindings = DB::table('admin_user_site_roles')
+                        ->where('admin_user_id', $userId)
+                        ->get(['site_id', 'role_id']);
+
+                    $onlyAutoSiteAdmin = $bindings->count() === 1
+                        && (int) $bindings[0]->site_id === $siteId
+                        && (int) $bindings[0]->role_id === (int) $siteAdminRoleId;
+
+                    if ($onlyAutoSiteAdmin) {
+                        AdminUser::query()->where('id', $userId)->delete();
+                    }
+                }
+            }
+
+            $site->delete();
+        });
+
+        $this->configResolver->forgetCache($siteCode);
+    }
+
     /**
      * @return array{site: AdminSite, secrets: array{sso_jwt_secret: string, wallet_api_key: string}}
      */
@@ -147,26 +208,6 @@ final class IntegrationSiteService
         return $trimmed === '' ? null : $trimmed;
     }
 
-    private function createSiteAdminRole(AdminSite $site): AdminRole
-    {
-        $slug = sprintf('site_admin_%s', (string) $site->code);
-        $role = AdminRole::query()->create([
-            'slug' => $slug,
-            'name' => sprintf('%s 站点后台管理员', (string) $site->name),
-            'description' => sprintf('自动创建：站点 %s (%s) 后台管理账号专用角色', (string) $site->name, (string) $site->code),
-            'status' => 1,
-            'is_system' => true,
-            'sort_order' => 900,
-            'scope_type' => AdminRole::SCOPE_SYSTEM,
-        ]);
-
-        $role->syncLegacyPermissionSlugs(
-            AdminPermissionInheritance::expand(self::SITE_ADMIN_PERMISSION_SLUGS),
-        );
-
-        return $role;
-    }
-
     /**
      * @param  array{username: string, nickname: string, password: string, email?: string|null}  $adminAccount
      */
@@ -191,7 +232,7 @@ final class IntegrationSiteService
             'status' => 0,
         ]);
 
-        $user->syncSystemRoleSlugsForSite((int) $site->id, [(string) $role->slug]);
+        $user->syncSystemRoleSlugsForSite((int) $site->id, [SitePlatformRole::SLUG]);
 
         return $user;
     }
diff --git a/app/Services/Wallet/PlayerLedgerLogsService.php b/app/Services/Wallet/PlayerLedgerLogsService.php
index 1f02e1e..d5d74ca 100644
--- a/app/Services/Wallet/PlayerLedgerLogsService.php
+++ b/app/Services/Wallet/PlayerLedgerLogsService.php
@@ -31,12 +31,14 @@ final class PlayerLedgerLogsService
         'prize' => ['settle_payout', 'prize', 'jackpot_manual_payout'],
     ];
 
-    /** PRD 对外类型 → credit_ledger.reason */
+    /** PRD 对外类型 → credit_ledger.reason（信用盘不用钱包「派彩」口径） */
     private const CREDIT_TYPE_TO_REASON = [
         'bet' => ['bet_hold', 'game_settlement_loss'],
         'reversal' => ['bet_hold_release'],
         'refund' => ['settlement_confirm'],
-        'prize' => ['game_settlement_win', 'settlement_payout'],
+        'win_credit' => ['game_settlement_win'],
+        'credit_release' => ['game_settlement_win', 'settlement_confirm', 'bet_hold_release'],
+        'bill_settlement' => ['settlement_payout'],
         'transfer_in' => [],
         'transfer_out' => [],
     ];
@@ -413,8 +415,18 @@ final class PlayerLedgerLogsService
         $items = $paginator->getCollection()
             ->map(function (object $row) use (&$runningMinor, $player, $currency): array {
                 $amount = (int) $row->amount;
-                $formatted = $this->formatPlayerCreditRow($row, $player, $currency, $runningMinor);
-                $runningMinor -= $amount;
+                $reason = (string) $row->reason;
+                $affectsBalance = $this->creditReasonAffectsAvailableBalance($reason);
+                $formatted = $this->formatPlayerCreditRow(
+                    $row,
+                    $player,
+                    $currency,
+                    $affectsBalance ? $runningMinor : null,
+                    $affectsBalance,
+                );
+                if ($affectsBalance) {
+                    $runningMinor -= $amount;
+                }
 
                 return $formatted;
             })
@@ -530,24 +542,30 @@ final class PlayerLedgerLogsService
         object $row,
         Player $player,
         string $currency,
-        int $balanceAfterMinor,
+        ?int $balanceAfterMinor,
+        ?bool $affectsAvailableBalance = null,
     ): array {
         $amount = (int) $row->amount;
         $amountAbs = abs($amount);
-        $publicType = $this->creditReasonToPublicType((string) $row->reason);
+        $reason = (string) $row->reason;
+        $publicType = $this->creditReasonToPublicType($reason);
+        $affectsBalance = $affectsAvailableBalance ?? $this->creditReasonAffectsAvailableBalance($reason);
 
         return [
             'log_id' => 'CL-'.$row->id,
             'type' => $publicType,
-            'biz_type' => (string) $row->reason,
+            'biz_type' => $reason,
             'amount' => $amount,
             'amount_formatted' => CurrencyFormatter::fromMinor($amountAbs),
             'amount_abs' => $amountAbs,
             'amount_abs_formatted' => CurrencyFormatter::fromMinor($amountAbs),
             'direction' => $amount >= 0 ? 'in' : 'out',
             'currency_code' => $currency,
-            'balance_after' => $balanceAfterMinor,
-            'balance_after_formatted' => CurrencyFormatter::fromMinor($balanceAfterMinor),
+            'balance_after' => $affectsBalance ? $balanceAfterMinor : null,
+            'balance_after_formatted' => $affectsBalance && $balanceAfterMinor !== null
+                ? CurrencyFormatter::fromMinor($balanceAfterMinor)
+                : null,
+            'affects_available_credit' => $affectsBalance,
             'ref_id' => $this->creditRefLabel($row),
             'idempotent_key' => null,
             'external_ref_no' => null,
@@ -560,6 +578,12 @@ final class PlayerLedgerLogsService
         ];
     }
 
+    /** 账期收付记账不改变 player_credit_accounts，不参与可用信用倒推。 */
+    private function creditReasonAffectsAvailableBalance(string $reason): bool
+    {
+        return $reason !== 'settlement_payout';
+    }
+
     /**
      * @return array<string, mixed>
      */
@@ -611,7 +635,8 @@ final class PlayerLedgerLogsService
             'bet_hold', 'game_settlement_loss' => 'bet',
             'bet_hold_release' => 'reversal',
             'settlement_confirm' => 'refund',
-            'game_settlement_win', 'settlement_payout' => 'prize',
+            'game_settlement_win' => 'win_credit',
+            'settlement_payout' => 'bill_settlement',
             default => $reason,
         };
     }
diff --git a/app/Support/AdminAgentNodeAccess.php b/app/Support/AdminAgentNodeAccess.php
index b1951b0..c093c84 100644
--- a/app/Support/AdminAgentNodeAccess.php
+++ b/app/Support/AdminAgentNodeAccess.php
@@ -23,6 +23,22 @@ final class AdminAgentNodeAccess
                 ?? AdminSite::query()->orderBy('id')->value('id'));
         }
 
+        // Check if admin is a platform account (bound via admin_user_site_roles)
+        $accessibleSiteIds = $admin->accessibleAdminSiteIds();
+        if ($accessibleSiteIds !== null) {
+            // Platform account (site admin)
+            if ($requestedSiteId !== null && $requestedSiteId > 0) {
+                if (in_array($requestedSiteId, $accessibleSiteIds, true)) {
+                    return $requestedSiteId;
+                }
+                return null;
+            }
+
+            // Return first accessible site if no specific site requested
+            return $accessibleSiteIds[0] ?? null;
+        }
+
+        // Agent account (bound via agent node)
         $actor = AdminAgentScope::primaryAgentNode($admin);
         if ($actor === null) {
             return null;
diff --git a/app/Support/AdminAgentScope.php b/app/Support/AdminAgentScope.php
index 3fdb5fd..f321623 100644
--- a/app/Support/AdminAgentScope.php
+++ b/app/Support/AdminAgentScope.php
@@ -32,6 +32,14 @@ final class AdminAgentScope
             return true;
         }
 
+        // Check if admin is a platform account (bound via admin_user_site_roles)
+        $accessibleSiteIds = $admin->accessibleAdminSiteIds();
+        if ($accessibleSiteIds !== null) {
+            // Platform account (site admin) can see all nodes in the site
+            return in_array((int) $node->admin_site_id, $accessibleSiteIds, true);
+        }
+
+        // Agent account (bound via agent node)
         $actor = self::primaryAgentNode($admin);
         if ($actor === null) {
             return false;
@@ -90,6 +98,14 @@ final class AdminAgentScope
             return false;
         }
 
+        // Check if admin is a platform account (bound via admin_user_site_roles)
+        $accessibleSiteIds = $admin->accessibleAdminSiteIds();
+        if ($accessibleSiteIds !== null) {
+            // Platform account (site admin) can edit all nodes in the site
+            return in_array((int) $node->admin_site_id, $accessibleSiteIds, true);
+        }
+
+        // Agent account (bound via agent node)
         $actor = self::primaryAgentNode($admin);
         if ($actor === null) {
             return false;
@@ -115,6 +131,17 @@ final class AdminAgentScope
             return $query;
         }
 
+        // Check if admin is a platform account (bound via admin_user_site_roles)
+        $accessibleSiteIds = $admin->accessibleAdminSiteIds();
+        if ($accessibleSiteIds !== null) {
+            // Platform account (site admin) can see all nodes in the site
+            if (in_array($adminSiteId, $accessibleSiteIds, true)) {
+                return $query;
+            }
+            return $query->whereRaw('0 = 1');
+        }
+
+        // Agent account (bound via agent node)
         $actor = self::primaryAgentNode($admin);
         if ($actor === null || (int) $actor->admin_site_id !== $adminSiteId) {
             return $query->whereRaw('0 = 1');
diff --git a/app/Support/AdminAuthProfile.php b/app/Support/AdminAuthProfile.php
index d0a11db..986130b 100644
--- a/app/Support/AdminAuthProfile.php
+++ b/app/Support/AdminAuthProfile.php
@@ -38,6 +38,7 @@ final class AdminAuthProfile
      *     can_create_child_agent: bool,
      *     can_create_player: bool
      *   },
+     *   site: ?array{id: int, code: string, name: string},
      *   is_super_admin: bool,
      *   operational_permissions: list<string>,
      *   delegation_ceiling: list<string>,
@@ -58,6 +59,7 @@ final class AdminAuthProfile
             'permissions' => $permissionSlugs,
             'navigation' => AdminAuthorizationRegistry::visibleNavigationItems($permissionSlugs, $fresh),
             'agent' => $agent,
+            'site' => self::siteContext($fresh),
             'is_super_admin' => $fresh->isSuperAdmin(),
             'operational_permissions' => $permissionSlugs,
             'delegation_ceiling' => AgentDelegationAuthorization::delegationLegacySlugsForAdminUser($fresh),
@@ -71,19 +73,32 @@ final class AdminAuthProfile
     }
 
     /**
-     * @return array{
-     *   id: int,
-     *   admin_site_id: int,
-     *   admin_site_name: string,
-     *   site_code: string,
-     *   path: string,
-     *   code: string,
-     *   name: string,
-     *   depth: int,
-     *   can_create_child_agent: bool,
-     *   can_create_player: bool
-     * }|null
+     * @return array{id: int, code: string, name: string}|null
      */
+    private static function siteContext(AdminUser $admin): ?array
+    {
+        if ($admin->isSuperAdmin() || $admin->primaryAgentNode() !== null) {
+            return null;
+        }
+
+        if (! SitePlatformRole::userHasSiteAdminRole($admin)) {
+            return null;
+        }
+
+        $sites = AdminUserSiteBindingPresenter::accessibleSitesFor($admin);
+        if ($sites === []) {
+            return null;
+        }
+
+        $site = $sites[0];
+
+        return [
+            'id' => (int) $site['id'],
+            'code' => (string) $site['code'],
+            'name' => (string) $site['name'],
+        ];
+    }
+
     private static function agentContext(AdminUser $admin): ?array
     {
         if ($admin->isSuperAdmin()) {
diff --git a/app/Support/AdminAuthorizationRegistry.php b/app/Support/AdminAuthorizationRegistry.php
index f44ef0e..9effc5d 100644
--- a/app/Support/AdminAuthorizationRegistry.php
+++ b/app/Support/AdminAuthorizationRegistry.php
@@ -462,7 +462,7 @@ final class AdminAuthorizationRegistry
             ['code' => 'admin.settlement-reports.summary', 'module_code' => 'settlement', 'name' => '代理结算报表摘要', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/settlement-reports/summary', 'route_name' => 'api.v1.admin.settlement-reports.summary', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'permission_codes' => ['settlement.agent.view', 'settlement.agent.manage'], 'legacy_permission_slugs' => ['prd.settlement.agent.view', 'prd.settlement.agent.manage']],
             ['code' => 'admin.settlement-reports.show', 'module_code' => 'settlement', 'name' => '信用占成盘报表', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/settlement-reports', 'route_name' => 'api.v1.admin.settlement-reports.show', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'permission_codes' => ['settlement.agent.view', 'settlement.agent.manage'], 'legacy_permission_slugs' => ['prd.settlement.agent.view', 'prd.settlement.agent.manage']],
 
-            ['code' => 'admin.play-types.index', 'module_code' => 'config', 'name' => '玩法类型列表', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/play-types', 'route_name' => 'api.v1.admin.play-types.index', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'legacy_permission_slugs' => ['prd.play_switch.manage', 'prd.odds.manage', 'prd.odds.view', 'prd.rebate.manage', 'prd.rebate.view']],
+            ['code' => 'admin.play-types.index', 'module_code' => 'config', 'name' => '玩法类型列表', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/play-types', 'route_name' => 'api.v1.admin.play-types.index', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'legacy_permission_slugs' => ['prd.play_switch.manage', 'prd.odds.manage', 'prd.odds.view', 'prd.rebate.manage', 'prd.rebate.view', 'prd.report.view', 'prd.dashboard.view']],
             ['code' => 'admin.play-types.patch', 'module_code' => 'config', 'name' => '玩法类型切换', 'http_method' => 'PATCH', 'uri_pattern' => '/api/v1/admin/play-types/{play_code}', 'route_name' => 'api.v1.admin.play-types.patch', 'auth_mode' => 'permission_required', 'is_audit_required' => true, 'legacy_permission_slugs' => ['prd.play_switch.manage']],
             ['code' => 'admin.config.play-versions.index', 'module_code' => 'config', 'name' => '玩法版本列表', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/config/play-versions', 'route_name' => 'api.v1.admin.config.play-versions.index', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'legacy_permission_slugs' => ['prd.play_switch.manage', 'prd.odds.manage', 'prd.odds.view']],
             ['code' => 'admin.config.play-versions.show', 'module_code' => 'config', 'name' => '玩法版本详情', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/config/play-versions/{id}', 'route_name' => 'api.v1.admin.config.play-versions.show', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'legacy_permission_slugs' => ['prd.play_switch.manage', 'prd.odds.manage', 'prd.odds.view']],
@@ -494,6 +494,7 @@ final class AdminAuthorizationRegistry
             ['code' => 'admin.integration-sites.store', 'module_code' => 'integration', 'name' => '创建接入站点', 'http_method' => 'POST', 'uri_pattern' => '/api/v1/admin/integration-sites', 'route_name' => 'api.v1.admin.integration-sites.store', 'auth_mode' => 'permission_required', 'is_audit_required' => true, 'permission_codes' => ['integration.site.manage']],
             ['code' => 'admin.integration-sites.show', 'module_code' => 'integration', 'name' => '接入站点详情', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}', 'route_name' => 'api.v1.admin.integration-sites.show', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'permission_codes' => ['integration.site.view', 'integration.site.manage']],
             ['code' => 'admin.integration-sites.update', 'module_code' => 'integration', 'name' => '更新接入站点', 'http_method' => 'PUT', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}', 'route_name' => 'api.v1.admin.integration-sites.update', 'auth_mode' => 'permission_required', 'is_audit_required' => true, 'permission_codes' => ['integration.site.manage']],
+            ['code' => 'admin.integration-sites.destroy', 'module_code' => 'integration', 'name' => '删除接入站点', 'http_method' => 'DELETE', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}', 'route_name' => 'api.v1.admin.integration-sites.destroy', 'auth_mode' => 'permission_required', 'is_audit_required' => true, 'permission_codes' => ['integration.site.manage']],
             ['code' => 'admin.integration-sites.rotate-secrets', 'module_code' => 'integration', 'name' => '重置接入密钥', 'http_method' => 'POST', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}/rotate-secrets', 'route_name' => 'api.v1.admin.integration-sites.rotate-secrets', 'auth_mode' => 'permission_required', 'is_audit_required' => true, 'permission_codes' => ['integration.site.manage']],
             ['code' => 'admin.integration-sites.connectivity-test', 'module_code' => 'integration', 'name' => '接入站点联通检测', 'http_method' => 'POST', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}/connectivity-test', 'route_name' => 'api.v1.admin.integration-sites.connectivity-test', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'permission_codes' => ['integration.site.view', 'integration.site.manage']],
             ['code' => 'admin.integration-sites.export', 'module_code' => 'integration', 'name' => '导出接入参数表', 'http_method' => 'GET', 'uri_pattern' => '/api/v1/admin/integration-sites/{admin_site}/export', 'route_name' => 'api.v1.admin.integration-sites.export', 'auth_mode' => 'permission_required', 'is_audit_required' => false, 'permission_codes' => ['integration.site.view', 'integration.site.manage']],
diff --git a/app/Support/AdminIntegrationSitePresenter.php b/app/Support/AdminIntegrationSitePresenter.php
index c27e849..f45f73d 100644
--- a/app/Support/AdminIntegrationSitePresenter.php
+++ b/app/Support/AdminIntegrationSitePresenter.php
@@ -29,6 +29,7 @@ final class AdminIntegrationSitePresenter
             'wallet_api_key_masked' => is_string($site->wallet_api_key_encrypted) && $site->wallet_api_key_encrypted !== ''
                 ? '••••••••'
                 : null,
+            'is_default' => (bool) $site->is_default,
             'updated_at' => $site->updated_at?->toIso8601String(),
         ];
     }
@@ -38,16 +39,16 @@ final class AdminIntegrationSitePresenter
      */
     public static function detail(AdminSite $site): array
     {
-        return array_merge(self::listItem($site), [
+        return [
+            ...self::listItem($site),
             'wallet_debit_path' => (string) $site->wallet_debit_path,
             'wallet_credit_path' => (string) $site->wallet_credit_path,
             'wallet_balance_path' => (string) $site->wallet_balance_path,
             'iframe_allowed_origins' => $site->iframe_allowed_origins ?? [],
             'lottery_h5_base_url' => $site->lottery_h5_base_url,
             'notes' => $site->notes,
-            'is_default' => (bool) $site->is_default,
             'created_at' => $site->created_at?->toIso8601String(),
-        ]);
+        ];
     }
 
     /**
diff --git a/app/Support/PlatformSystemRoles.php b/app/Support/PlatformSystemRoles.php
index 1f3fce0..4903620 100644
--- a/app/Support/PlatformSystemRoles.php
+++ b/app/Support/PlatformSystemRoles.php
@@ -11,10 +11,12 @@ final class PlatformSystemRoles
 
     public const SLUG_AGENT = 'agent';
 
+    public const SLUG_SITE_ADMIN = SitePlatformRole::SLUG;
+
     /** @return list<string> */
     public static function fixedSlugs(): array
     {
-        return [self::SLUG_SUPER_ADMIN, self::SLUG_AGENT];
+        return [self::SLUG_SUPER_ADMIN, self::SLUG_SITE_ADMIN, self::SLUG_AGENT];
     }
 
     public static function isFixedSlug(string $slug): bool
@@ -49,6 +51,7 @@ final class PlatformSystemRoles
     public static function ensureAll(): void
     {
         self::ensureSuperAdminRole();
+        SiteAdminDefaultRolePermissions::ensurePlatformSiteAdminRole();
         AgentDefaultRolePermissions::ensurePlatformAgentRole();
     }
 }
diff --git a/app/Support/SiteAdminDefaultRolePermissions.php b/app/Support/SiteAdminDefaultRolePermissions.php
new file mode 100644
index 0000000..b0cf2ba
--- /dev/null
+++ b/app/Support/SiteAdminDefaultRolePermissions.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace App\Support;
+
+use App\Models\AdminRole;
+
+/**
+ * 平台「站点管理员」系统角色（slug=site_admin）的默认 prd.* 模板。
+ * 接入站点创建时自动绑定；权限可在「平台角色管理」调整。
+ */
+final class SiteAdminDefaultRolePermissions
+{
+    /** @var list<string> */
+    private const TEMPLATE_SLUGS = [
+        'prd.dashboard.view',
+        'prd.agent.view',
+        'prd.agent.manage',
+        'prd.agent.role.view',
+        'prd.agent.role.manage',
+        'prd.agent.user.view',
+        'prd.agent.user.manage',
+        'prd.agent.profile.manage',
+        'prd.users.manage',
+        'prd.tickets.view',
+        'prd.report.view',
+        'prd.settlement.agent.view',
+        'prd.settlement.agent.manage',
+        'prd.integration.view',
+    ];
+
+    /**
+     * @return list<string>
+     */
+    public static function templateSlugs(): array
+    {
+        return self::TEMPLATE_SLUGS;
+    }
+
+    public static function ensurePlatformSiteAdminRole(): AdminRole
+    {
+        $role = AdminRole::query()->updateOrCreate(
+            [
+                'slug' => SitePlatformRole::SLUG,
+                'scope_type' => AdminRole::SCOPE_SYSTEM,
+            ],
+            [
+                'code' => SitePlatformRole::SLUG,
+                'name' => '站点管理员',
+                'description' => '接入站点后台默认权限（代理/玩家/结算运营 + 站点仪表盘）',
+                'status' => 1,
+                'is_system' => true,
+                'sort_order' => 40,
+                'owner_agent_id' => null,
+                'delegated_from_role_id' => null,
+            ],
+        );
+
+        $role->syncLegacyPermissionSlugs(
+            AdminPermissionInheritance::expand(self::TEMPLATE_SLUGS),
+        );
+
+        return $role->fresh() ?? $role;
+    }
+}
diff --git a/app/Support/SitePlatformRole.php b/app/Support/SitePlatformRole.php
new file mode 100644
index 0000000..59b48a5
--- /dev/null
+++ b/app/Support/SitePlatformRole.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace App\Support;
+
+use App\Models\AdminRole;
+use App\Models\AdminUser;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Validation\ValidationException;
+
+/** 接入站点后台账号统一使用平台系统角色 slug=site_admin。 */
+final class SitePlatformRole
+{
+    public const SLUG = 'site_admin';
+
+    public static function resolve(): AdminRole
+    {
+        return SiteAdminDefaultRolePermissions::ensurePlatformSiteAdminRole();
+    }
+
+    public static function id(): int
+    {
+        return (int) self::resolve()->id;
+    }
+
+    public static function idOrFail(): int
+    {
+        $id = (int) (AdminRole::query()
+            ->where('scope_type', AdminRole::SCOPE_SYSTEM)
+            ->where('slug', self::SLUG)
+            ->where('status', 1)
+            ->value('id') ?? 0);
+
+        if ($id <= 0) {
+            throw ValidationException::withMessages([
+                'role' => ['platform_site_admin_role_missing: run php artisan lottery:admin-auth-sync'],
+            ]);
+        }
+
+        return $id;
+    }
+
+    public static function userHasSiteAdminRole(AdminUser $user): bool
+    {
+        if ($user->isSuperAdmin() || $user->hasPrimaryAgentBinding()) {
+            return false;
+        }
+
+        return DB::table('admin_user_site_roles as usr')
+            ->join('admin_roles as r', 'r.id', '=', 'usr.role_id')
+            ->where('usr.admin_user_id', $user->id)
+            ->where('r.slug', self::SLUG)
+            ->exists();
+    }
+}
diff --git a/app/Support/SuperAdminAccount.php b/app/Support/SuperAdminAccount.php
new file mode 100644
index 0000000..612de51
--- /dev/null
+++ b/app/Support/SuperAdminAccount.php
@@ -0,0 +1,63 @@
+<?php
+
+namespace App\Support;
+
+use App\Models\AdminUser;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Validation\ValidationException;
+
+/** 平台唯一超级管理员账号（不绑定站点）。 */
+final class SuperAdminAccount
+{
+    public static function assign(AdminUser $user): AdminUser
+    {
+        return DB::transaction(function () use ($user): AdminUser {
+            DB::table('admin_users')
+                ->where('id', '!=', $user->id)
+                ->update(['is_super_admin' => false]);
+
+            $user->forceFill(['is_super_admin' => true])->save();
+
+            self::removeLegacySiteRoleBinding((int) $user->id);
+
+            return $user->fresh() ?? $user;
+        });
+    }
+
+    public static function revoke(AdminUser $user): AdminUser
+    {
+        $user->forceFill(['is_super_admin' => false])->save();
+
+        return $user->fresh() ?? $user;
+    }
+
+    public static function count(): int
+    {
+        return (int) AdminUser::query()->where('is_super_admin', true)->count();
+    }
+
+    public static function assertNotSiteRoleAssignment(array $roleSlugs): void
+    {
+        if (in_array(AdminUser::ROLE_SUPER_ADMIN, $roleSlugs, true)) {
+            throw ValidationException::withMessages([
+                'role_slugs' => [__('admin.super_admin_not_site_role')],
+            ]);
+        }
+    }
+
+    private static function removeLegacySiteRoleBinding(int $userId): void
+    {
+        $superRoleId = DB::table('admin_roles')
+            ->where('slug', AdminUser::ROLE_SUPER_ADMIN)
+            ->value('id');
+
+        if ($superRoleId === null) {
+            return;
+        }
+
+        DB::table('admin_user_site_roles')
+            ->where('admin_user_id', $userId)
+            ->where('role_id', $superRoleId)
+            ->delete();
+    }
+}
diff --git a/database/migrations/2026_06_12_120000_add_is_super_admin_to_admin_users.php b/database/migrations/2026_06_12_120000_add_is_super_admin_to_admin_users.php
new file mode 100644
index 0000000..0b7723b
--- /dev/null
+++ b/database/migrations/2026_06_12_120000_add_is_super_admin_to_admin_users.php
@@ -0,0 +1,67 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::table('admin_users', function (Blueprint $table): void {
+            $table->boolean('is_super_admin')->default(false)->after('status');
+        });
+
+        $superRoleId = DB::table('admin_roles')->where('slug', 'super_admin')->value('id');
+        if ($superRoleId !== null) {
+            $superUserIds = DB::table('admin_user_site_roles')
+                ->where('role_id', $superRoleId)
+                ->distinct()
+                ->pluck('admin_user_id');
+
+            foreach ($superUserIds as $userId) {
+                DB::table('admin_users')
+                    ->where('id', $userId)
+                    ->update(['is_super_admin' => true]);
+            }
+
+            DB::table('admin_user_site_roles')
+                ->where('role_id', $superRoleId)
+                ->delete();
+        }
+
+        // 仅允许一名超管：若历史数据误绑多名，保留最小 id。
+        $superAdminIds = DB::table('admin_users')
+            ->where('is_super_admin', true)
+            ->orderBy('id')
+            ->pluck('id');
+
+        if ($superAdminIds->count() > 1) {
+            $keepId = (int) $superAdminIds->first();
+            DB::table('admin_users')
+                ->where('is_super_admin', true)
+                ->where('id', '!=', $keepId)
+                ->update(['is_super_admin' => false]);
+        }
+
+        $driver = Schema::getConnection()->getDriverName();
+        if ($driver === 'pgsql') {
+            DB::statement('CREATE UNIQUE INDEX admin_users_single_super_admin ON admin_users (is_super_admin) WHERE is_super_admin = true');
+        } elseif ($driver === 'sqlite') {
+            DB::statement('CREATE UNIQUE INDEX admin_users_single_super_admin ON admin_users (is_super_admin) WHERE is_super_admin = 1');
+        }
+    }
+
+    public function down(): void
+    {
+        $driver = Schema::getConnection()->getDriverName();
+        if (in_array($driver, ['pgsql', 'sqlite'], true)) {
+            DB::statement('DROP INDEX IF EXISTS admin_users_single_super_admin');
+        }
+
+        Schema::table('admin_users', function (Blueprint $table): void {
+            $table->dropColumn('is_super_admin');
+        });
+    }
+};
diff --git a/database/migrations/2026_06_12_140000_seed_platform_site_admin_role.php b/database/migrations/2026_06_12_140000_seed_platform_site_admin_role.php
new file mode 100644
index 0000000..333cf7d
--- /dev/null
+++ b/database/migrations/2026_06_12_140000_seed_platform_site_admin_role.php
@@ -0,0 +1,47 @@
+<?php
+
+use App\Models\AdminRole;
+use App\Support\SiteAdminDefaultRolePermissions;
+use App\Support\SitePlatformRole;
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        SiteAdminDefaultRolePermissions::ensurePlatformSiteAdminRole();
+        $platformRoleId = SitePlatformRole::id();
+
+        $legacyRoles = AdminRole::query()
+            ->where('scope_type', AdminRole::SCOPE_SYSTEM)
+            ->where('slug', 'like', 'site_admin_%')
+            ->where('slug', '<>', SitePlatformRole::SLUG)
+            ->get(['id', 'slug']);
+
+        foreach ($legacyRoles as $legacy) {
+            $bindings = DB::table('admin_user_site_roles')
+                ->where('role_id', $legacy->id)
+                ->get(['admin_user_id', 'site_id', 'granted_at']);
+
+            foreach ($bindings as $binding) {
+                DB::table('admin_user_site_roles')->updateOrInsert(
+                    [
+                        'admin_user_id' => (int) $binding->admin_user_id,
+                        'site_id' => (int) $binding->site_id,
+                        'role_id' => $platformRoleId,
+                    ],
+                    ['granted_at' => $binding->granted_at ?? now()],
+                );
+            }
+
+            DB::table('admin_user_site_roles')->where('role_id', $legacy->id)->delete();
+            AdminRole::query()->where('id', $legacy->id)->delete();
+        }
+    }
+
+    public function down(): void
+    {
+        // 不回滚 per-site 角色拆分；仅保留平台 site_admin 角色。
+    }
+};
diff --git a/database/seeders/AdminRbacAndUserSeeder.php b/database/seeders/AdminRbacAndUserSeeder.php
index de7d9e0..2723a88 100644
--- a/database/seeders/AdminRbacAndUserSeeder.php
+++ b/database/seeders/AdminRbacAndUserSeeder.php
@@ -7,6 +7,7 @@ use Illuminate\Database\Seeder;
 use App\Support\AdminAgentPermissionMenuActionSync;
 use App\Support\AdminDrawPermissionMenuActionSync;
 use App\Support\PlatformSystemRoles;
+use App\Support\SuperAdminAccount;
 
 /**
  * 后台 RBAC：平台固定角色 super_admin / agent。
@@ -22,8 +23,6 @@ final class AdminRbacAndUserSeeder extends Seeder
 
         PlatformSystemRoles::ensureAll();
 
-        $super = PlatformSystemRoles::ensureSuperAdminRole();
-
         $username = 'admin';
         AdminUser::query()->updateOrCreate(
             ['username' => $username],
@@ -37,13 +36,6 @@ final class AdminRbacAndUserSeeder extends Seeder
 
         /** @var AdminUser $admin */
         $admin = AdminUser::query()->where('username', $username)->firstOrFail();
-        $siteId = AdminUser::defaultAdminSiteId();
-        $superId = (int) $super->getKey();
-        $admin->roles()->sync([
-            $superId => [
-                'site_id' => $siteId,
-                'granted_at' => now(),
-            ],
-        ]);
+        SuperAdminAccount::assign($admin);
     }
 }
diff --git a/docs/admin-rbac.md b/docs/admin-rbac.md
index 729a311..f20a894 100644
--- a/docs/admin-rbac.md
+++ b/docs/admin-rbac.md
@@ -70,7 +70,7 @@ php artisan lottery:admin-auth-audit          # 仅体检：受保护路由是
 
 ### 路径 B：平台运营账号（单站）
 
-1. 平台 **角色管理** 仅有两个内置角色：**超级管理员**（自动拥有全部 `prd.*`，随 `lottery:admin-auth-sync` 补齐）与 **代理**（经营主账号默认模板，可在此调整 `prd.*`）。若需更细的平台运营分工，请使用不同平台账号并绑定 **代理** 角色后按需收窄权限；勿授予 `prd.agent-line.provision`、全站接入密钥类权限。
+1. 平台 **角色管理** 有三个内置角色：**超级管理员**（平台唯一账号，`admin_users.is_super_admin`，不绑定站点，自动拥有全部 `prd.*`）、**站点管理员**（`slug=site_admin`，接入站点自动创建的后台账号默认角色，含站点仪表盘 + 代理/玩家/结算运营）、**代理**（经营主账号默认模板）。若需更细的平台运营分工，可在「平台账号」上绑定 **站点管理员** 或 **代理** 后按需收窄权限；勿授予 `prd.agent-line.provision`、全站接入密钥类权限。
 2. **系统 → 平台账号 → 新建**：填写账号信息，**选择目标站点**（`admin_site_id`），勾选上一步角色。
 3. 对方登录后仅见绑定站点数据；`auth/me.accessible_sites` 列出可访问站点（单站时一项）。
 
diff --git a/lang/en/admin.php b/lang/en/admin.php
index 9bcba97..80f09d9 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -11,6 +11,10 @@ return [
     'site_access_denied' => 'You do not have access to this site.',
     'site_rotate_denied' => 'You cannot rotate secrets for this site.',
     'site_update_denied' => 'You cannot modify this site.',
+    'site_delete_denied' => 'You cannot delete this site.',
+    'integration_site_default_delete_denied' => 'The default site cannot be deleted.',
+    'integration_site_last_delete_denied' => 'At least one integration site must remain; the last site cannot be deleted.',
+    'no_integration_site' => 'Create an integration site first.',
     'site_player_access_denied' => 'You do not have access to players under this site.',
     'player_create_site_forbidden' => 'You cannot create players under this site.',
     'player_create_agent_required' => 'A player must belong to an agent node. Choose a valid site with an agent root, or sign in with an agent-bound account.',
@@ -39,6 +43,7 @@ return [
     'user_cannot_delete_self' => 'Cannot delete your own account.',
     'user_cannot_delete_last_super_admin' => 'Cannot delete the last super admin.',
     'super_admin_only_for_roles' => 'Only super admins can manage roles.',
+    'super_admin_not_site_role' => 'Super admin is a single platform account and cannot be assigned as a site role.',
     'route_name_missing_for_permission' => 'Admin route is missing a route name for permission checks.',
     'api_resource_not_configured' => 'Admin API resource is not configured: :route',
     'api_resource_no_permission_binding' => 'Admin API resource has no permission binding: :code',
diff --git a/lang/ne/admin.php b/lang/ne/admin.php
index 4de0576..eed3d5e 100644
--- a/lang/ne/admin.php
+++ b/lang/ne/admin.php
@@ -11,6 +11,10 @@ return [
     'site_access_denied' => 'यो साइटमा पहुँच छैन।',
     'site_rotate_denied' => 'यो साइटको गोप्यियता परिवर्तन गर्न मिल्दैन।',
     'site_update_denied' => 'यो साइट सम्पादन गर्न मिल्दैन।',
+    'site_delete_denied' => 'यो साइट मेटाउन मिल्दैन।',
+    'integration_site_default_delete_denied' => 'पूर्वनिर्धारित साइट मेटाउन मिल्दैन।',
+    'integration_site_last_delete_denied' => 'कम्तीमा एउटा इन्टिग्रेशन साइट राख्नुपर्छ; अन्तिम साइट मेटाउन मिल्दैन।',
+    'no_integration_site' => 'पहिले इन्टिग्रेशन साइट सिर्जना गर्नुहोस्।',
     'site_player_access_denied' => 'यो साइटका खेलाडीहरूमा पहुँच छैन।',
     'player_create_site_forbidden' => 'यो साइटमा खेलाडी सिर्जना गर्न मिल्दैन।',
     'player_create_agent_required' => 'खेलाडी एजेन्ट नोडमा हुनुपर्छ: मान्य साइट (एजेन्ट रुट सहित) छान्नुहोस्, वा एजेन्ट खाताबाट साइन इन गर्नुहोस्।',
@@ -39,6 +43,7 @@ return [
     'user_cannot_delete_self' => 'आफ्नै खाता मेटाउन मिल्दैन।',
     'user_cannot_delete_last_super_admin' => 'अन्तिम सुपर एडमिन मेटाउन मिल्दैन।',
     'super_admin_only_for_roles' => 'भूमिका व्यवस्थापन केवल सुपर एडमिनले गर्न सक्छ।',
+    'super_admin_not_site_role' => 'सुपर एडमिन एक मात्र प्लेटफर्म खाता हो; साइट भूमिकाको रूपमा назнач गर्न मिल्दैन।',
     'route_name_missing_for_permission' => 'एडमिन रुटमा route name छैन, अनुमति जाँच गर्न सकिँदैन।',
     'api_resource_not_configured' => 'एडमिन API स्रोत कन्फिग गरिएको छैन: :route',
     'api_resource_no_permission_binding' => 'एडमिन API स्रोतमा अनुमति बाइन्डिङ छैन: :code',
diff --git a/lang/zh/admin.php b/lang/zh/admin.php
index d2e659b..0b36c4b 100644
--- a/lang/zh/admin.php
+++ b/lang/zh/admin.php
@@ -11,6 +11,10 @@ return [
     'site_access_denied' => '无权访问该站点。',
     'site_rotate_denied' => '无权操作该站点。',
     'site_update_denied' => '无权修改该站点。',
+    'site_delete_denied' => '无权删除该站点。',
+    'integration_site_default_delete_denied' => '默认站点不可删除。',
+    'integration_site_last_delete_denied' => '至少保留一个接入站点，无法删除最后一个站点。',
+    'no_integration_site' => '请先创建接入站点。',
     'site_player_access_denied' => '无权访问该站点下的玩家。',
     'integration_site_store_deprecated' => '请先在「平台配置 → 接入站点」创建站点，再在「代理配置 → 创建一级代理」绑定一级代理。',
     'player_create_site_forbidden' => '无权在该站点下创建玩家。',
@@ -41,6 +45,7 @@ return [
     'user_cannot_delete_self' => '不能删除当前登录账号。',
     'user_cannot_delete_last_super_admin' => '不能删除最后一个超级管理员。',
     'super_admin_only_for_roles' => '仅超级管理员可管理角色。',
+    'super_admin_not_site_role' => '超级管理员为平台唯一账号，不能通过站点角色分配。',
     'route_name_missing_for_permission' => '后台路由缺少 route name，无法执行资源鉴权。',
     'api_resource_not_configured' => '后台 API 资源未配置：:route',
     'api_resource_no_permission_binding' => '后台 API 资源未绑定权限动作：:code',
diff --git a/routes/api/v1/admin/integration.php b/routes/api/v1/admin/integration.php
index 20b4967..b3af864 100644
--- a/routes/api/v1/admin/integration.php
+++ b/routes/api/v1/admin/integration.php
@@ -9,6 +9,7 @@ use App\Http\Controllers\Api\V1\Admin\Integration\AdminIntegrationSiteRotateSecr
 use App\Http\Controllers\Api\V1\Admin\Integration\AdminIntegrationSiteConnectivityTestController;
 use App\Http\Controllers\Api\V1\Admin\Integration\AdminIntegrationSiteExportController;
 use App\Http\Controllers\Api\V1\Admin\Integration\AdminIntegrationSiteSecretsController;
+use App\Http\Controllers\Api\V1\Admin\Integration\AdminIntegrationSiteDestroyController;
 
 Route::middleware('admin.api-resource')
     ->group(function (): void {
@@ -20,6 +21,8 @@ Route::middleware('admin.api-resource')
             ->name('api.v1.admin.integration-sites.show');
         Route::put('integration-sites/{admin_site}', AdminIntegrationSiteUpdateController::class)
             ->name('api.v1.admin.integration-sites.update');
+        Route::delete('integration-sites/{admin_site}', AdminIntegrationSiteDestroyController::class)
+            ->name('api.v1.admin.integration-sites.destroy');
         Route::post('integration-sites/{admin_site}/rotate-secrets', AdminIntegrationSiteRotateSecretsController::class)
             ->name('api.v1.admin.integration-sites.rotate-secrets');
         Route::post('integration-sites/{admin_site}/connectivity-test', AdminIntegrationSiteConnectivityTestController::class)
diff --git a/tests/Feature/AdminAuthLoginTest.php b/tests/Feature/AdminAuthLoginTest.php
index 5bcb922..c83c4c9 100644
--- a/tests/Feature/AdminAuthLoginTest.php
+++ b/tests/Feature/AdminAuthLoginTest.php
@@ -21,33 +21,7 @@ test('admin auth me returns current admin profile', function () {
         'email' => null,
         'password' => 'secret-strong',
         'status' => 0,
-    ]);
-
-    $roleId = DB::table('admin_roles')->insertGetId([
-        'code' => 'super_admin',
-        'slug' => 'super_admin',
-        'name' => '超级管理员',
-        'description' => null,
-        'status' => 1,
-        'is_system' => true,
-        'sort_order' => 0,
-        'created_at' => now(),
-        'updated_at' => now(),
-    ]);
-    $siteId = DB::table('admin_sites')->insertGetId([
-        'code' => 'default',
-        'name' => '默认站点',
-        'is_default' => true,
-        'status' => 1,
-        'created_at' => now(),
-        'updated_at' => now(),
-    ]);
-
-    DB::table('admin_user_site_roles')->insert([
-        'admin_user_id' => $admin->id,
-        'site_id' => $siteId,
-        'role_id' => $roleId,
-        'granted_at' => now(),
+        'is_super_admin' => true,
     ]);
 
     $token = $admin->createToken('admin-api', ['*'], now()->addDay())->plainTextToken;
diff --git a/tests/Feature/AdminIntegrationSiteApiTest.php b/tests/Feature/AdminIntegrationSiteApiTest.php
index 794a800..e33d797 100644
--- a/tests/Feature/AdminIntegrationSiteApiTest.php
+++ b/tests/Feature/AdminIntegrationSiteApiTest.php
@@ -447,3 +447,97 @@ test('wallet_api_url rejects private ip with path', function (): void {
         ->assertStatus(422)
         ->assertJsonPath('data.errors.wallet_api_url.0', 'wallet_api_url 必须是 https 的公开域名根地址，并拒绝 localhost/内网 IP 与带路径/查询的地址。');
 });
+
+test('super admin can delete integration site and cleanup related data', function (): void {
+    $token = integrationAdminToken();
+
+    $create = $this->withHeader('Authorization', 'Bearer '.$token)
+        ->postJson('/api/v1/admin/integration-sites', [
+            'code' => 'partner-del',
+            'name' => 'Partner Delete Me',
+            'admin_account' => [
+                'username' => 'partner_del_admin',
+                'nickname' => 'Partner Del Admin',
+                'password' => 'secret-strong',
+            ],
+        ])
+        ->assertCreated();
+
+    $id = (int) $create->json('data.id');
+
+    Player::query()->create([
+        'site_code' => 'partner-del',
+        'site_player_id' => '90001',
+        'username' => 'partner_del_player',
+        'nickname' => 'Partner Del Player',
+        'default_currency' => 'NPR',
+        'status' => 1,
+    ]);
+
+    $this->withHeader('Authorization', 'Bearer '.$token)
+        ->deleteJson('/api/v1/admin/integration-sites/'.$id)
+        ->assertOk()
+        ->assertJsonPath('code', 0);
+
+    expect(AdminSite::query()->where('code', 'partner-del')->exists())->toBeFalse();
+    expect(Player::query()->where('site_code', 'partner-del')->exists())->toBeFalse();
+    expect(AdminUser::query()->where('username', 'partner_del_admin')->exists())->toBeFalse();
+    expect(DB::table('admin_roles')->where('slug', 'site_admin')->exists())->toBeTrue();
+    expect(DB::table('admin_roles')->where('slug', 'site_admin_partner-del')->exists())->toBeFalse();
+
+    expect(
+        AuditLog::query()
+            ->where('module_code', 'integration')
+            ->where('action_code', 'destroy')
+            ->where('target_id', (string) $id)
+            ->exists()
+    )->toBeTrue();
+});
+
+test('super admin can delete default integration site when another site exists', function (): void {
+    $token = integrationAdminToken();
+
+    $this->withHeader('Authorization', 'Bearer '.$token)
+        ->postJson('/api/v1/admin/integration-sites', [
+            'code' => 'partner-keep',
+            'name' => 'Partner Keep',
+            'admin_account' => [
+                'username' => 'partner_keep_admin',
+                'nickname' => 'Partner Keep Admin',
+                'password' => 'secret-strong',
+            ],
+        ])
+        ->assertCreated();
+
+    $defaultSite = AdminSite::query()->where('is_default', true)->firstOrFail();
+    $defaultSiteId = (int) $defaultSite->id;
+    $superAdminId = (int) AdminUser::query()->where('username', 'integration_admin')->value('id');
+
+    $this->withHeader('Authorization', 'Bearer '.$token)
+        ->deleteJson('/api/v1/admin/integration-sites/'.$defaultSiteId)
+        ->assertOk()
+        ->assertJsonPath('code', 0);
+
+    expect(AdminSite::query()->where('id', $defaultSiteId)->exists())->toBeFalse();
+    expect(AdminUser::query()->where('id', $superAdminId)->exists())->toBeTrue();
+    expect(AdminUser::query()->where('id', $superAdminId)->value('is_super_admin'))->toBeTruthy();
+});
+
+test('super admin can delete last integration site and remain authenticated', function (): void {
+    $token = integrationAdminToken();
+
+    foreach (AdminSite::query()->orderBy('id')->pluck('id') as $siteId) {
+        $this->withHeader('Authorization', 'Bearer '.$token)
+            ->deleteJson('/api/v1/admin/integration-sites/'.$siteId)
+            ->assertOk()
+            ->assertJsonPath('code', 0);
+    }
+
+    expect(AdminSite::query()->count())->toBe(0);
+
+    $this->withHeader('Authorization', 'Bearer '.$token)
+        ->getJson('/api/v1/admin/auth/me')
+        ->assertOk()
+        ->assertJsonPath('data.admin.is_super_admin', true)
+        ->assertJsonPath('data.admin.accessible_sites', []);
+});
diff --git a/tests/Feature/AdminSiteDashboardOverviewTest.php b/tests/Feature/AdminSiteDashboardOverviewTest.php
new file mode 100644
index 0000000..5242a30
--- /dev/null
+++ b/tests/Feature/AdminSiteDashboardOverviewTest.php
@@ -0,0 +1,70 @@
+<?php
+
+use App\Models\AdminSite;
+use App\Models\AdminUser;
+use App\Support\AdminAuthProfile;
+use App\Support\SitePlatformRole;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Hash;
+
+uses(RefreshDatabase::class);
+
+beforeEach(function (): void {
+    $this->artisan('lottery:admin-auth-sync')->assertExitCode(0);
+});
+
+test('site admin dashboard returns site overview for operator with dashboard permission', function (): void {
+    $super = AdminUser::query()->create([
+        'username' => 'super_site_dash',
+        'name' => 'Super',
+        'email' => null,
+        'password' => Hash::make('secret-strong'),
+        'status' => 0,
+    ]);
+    grantSuperAdminRole($super);
+
+    $token = $super->createToken('test', ['*'], now()->addDay())->plainTextToken;
+
+    $create = $this->withHeader('Authorization', 'Bearer '.$token)
+        ->postJson('/api/v1/admin/integration-sites', [
+            'code' => 'site-dash',
+            'name' => 'Site Dash',
+            'admin_account' => [
+                'username' => 'site_dash_admin',
+                'nickname' => 'Site Dash Admin',
+                'password' => 'secret-strong',
+            ],
+        ])
+        ->assertCreated();
+
+    $siteId = (int) $create->json('data.id');
+    $operator = AdminUser::query()->where('username', 'site_dash_admin')->firstOrFail();
+    $roleId = SitePlatformRole::id();
+
+    expect((int) DB::table('admin_user_site_roles')
+        ->where('admin_user_id', $operator->id)
+        ->where('site_id', $siteId)
+        ->where('role_id', $roleId)
+        ->count())->toBe(1);
+
+    expect(SitePlatformRole::userHasSiteAdminRole($operator))->toBeTrue();
+    expect(AdminAuthProfile::fromAdmin($operator)['site']['code'] ?? null)->toBe('site-dash');
+
+    $operatorToken = $operator->createToken('test', ['*'], now()->addDay())->plainTextToken;
+    app('auth')->forgetGuards();
+
+    $this->withHeader('Authorization', 'Bearer '.$operatorToken)
+        ->getJson('/api/v1/admin/auth/me')
+        ->assertOk()
+        ->assertJsonPath('data.admin.id', $operator->id)
+        ->assertJsonPath('data.admin.site.code', 'site-dash')
+        ->assertJsonPath('data.admin.agent', null);
+
+    $this->withHeader('Authorization', 'Bearer '.$operatorToken)
+        ->getJson('/api/v1/admin/dashboard')
+        ->assertOk()
+        ->assertJsonPath('data.site_overview.admin_site_id', $siteId)
+        ->assertJsonPath('data.site_overview.site_code', 'site-dash')
+        ->assertJsonPath('data.agent_overview', null);
+});
diff --git a/tests/Feature/CreditWalletLogsTest.php b/tests/Feature/CreditWalletLogsTest.php
index f57d6da..793b563 100644
--- a/tests/Feature/CreditWalletLogsTest.php
+++ b/tests/Feature/CreditWalletLogsTest.php
@@ -57,3 +57,80 @@ test('credit player wallet logs reads credit_ledger not wallet_txns', function (
         ->assertJsonPath('data.items.0.biz_type', 'bet_hold')
         ->assertJsonPath('data.items.0.ledger_source', 'credit_ledger');
 });
+
+test('credit player wallet logs distinguish win credit from bill settlement', function (): void {
+    $player = Player::query()->create([
+        'site_code' => 'default_site',
+        'site_player_id' => 'native:logs-2',
+        'auth_source' => PlayerAuthSource::LOTTERY_NATIVE,
+        'funding_mode' => PlayerFundingMode::CREDIT,
+        'username' => 'credit_logs_2',
+        'default_currency' => 'NPR',
+        'status' => 0,
+    ]);
+
+    DB::table('player_credit_accounts')->insert([
+        'player_id' => $player->id,
+        'credit_limit' => 500,
+        'used_credit' => 0,
+        'frozen_credit' => 0,
+        'created_at' => now(),
+        'updated_at' => now(),
+    ]);
+
+    DB::table('credit_ledger')->insert([
+        [
+            'owner_type' => 'player',
+            'owner_id' => $player->id,
+            'amount' => 3600,
+            'reason' => 'settlement_payout',
+            'ref_type' => 'settlement_bill',
+            'ref_id' => 25,
+            'created_at' => now()->subMinute(),
+            'updated_at' => now()->subMinute(),
+        ],
+        [
+            'owner_type' => 'player',
+            'owner_id' => $player->id,
+            'amount' => 1200,
+            'reason' => 'game_settlement_win',
+            'ref_type' => 'ticket_item',
+            'ref_id' => 99,
+            'created_at' => now(),
+            'updated_at' => now(),
+        ],
+    ]);
+
+    $response = $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?page=1&size=10');
+
+    $response->assertOk()
+        ->assertJsonPath('data.total', 2)
+        ->assertJsonPath('data.items.0.type', 'win_credit')
+        ->assertJsonPath('data.items.0.biz_type', 'game_settlement_win')
+        ->assertJsonPath('data.items.0.affects_available_credit', true)
+        ->assertJsonPath('data.items.1.type', 'bill_settlement')
+        ->assertJsonPath('data.items.1.biz_type', 'settlement_payout')
+        ->assertJsonPath('data.items.1.affects_available_credit', false)
+        ->assertJsonPath('data.items.1.balance_after', null);
+
+    expect($response->json('data.items.0.balance_after'))->not->toBeNull();
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=bill_settlement')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'bill_settlement');
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=win_credit')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'win_credit');
+
+    $this->withHeader('Authorization', 'Bearer dev:'.$player->id)
+        ->getJson('/api/v1/wallet/logs?type=credit_release')
+        ->assertOk()
+        ->assertJsonPath('data.total', 1)
+        ->assertJsonPath('data.items.0.type', 'win_credit');
+});
diff --git a/tests/Feature/PlatformSystemRolesTest.php b/tests/Feature/PlatformSystemRolesTest.php
index f9e4f49..5d6a786 100644
--- a/tests/Feature/PlatformSystemRolesTest.php
+++ b/tests/Feature/PlatformSystemRolesTest.php
@@ -49,7 +49,7 @@ test('platform role index only lists fixed super_admin and agent roles', functio
         ->pluck('slug')
         ->all();
 
-    expect($slugs)->toBe(['super_admin', 'agent']);
+    expect($slugs)->toBe(['super_admin', 'site_admin', 'agent']);
 });
 
 test('platform roles cannot be created and super_admin permissions are full catalog', function (): void {
diff --git a/tests/Pest.php b/tests/Pest.php
index d85bdd8..70fdb26 100644
--- a/tests/Pest.php
+++ b/tests/Pest.php
@@ -50,30 +50,11 @@ expect()->extend('toBeOne', function () {
 |
 */
 
-/** 为后台测试账号挂上 `super_admin` 角色（细粒度权限校验全放行）。 */
+/** 为后台测试账号挂上唯一超级管理员（不绑定站点）。 */
 function grantSuperAdminRole(AdminUser $admin): void
 {
-    $now = now();
-    DB::table('admin_roles')->updateOrInsert(
-        ['slug' => AdminUser::ROLE_SUPER_ADMIN],
-        [
-            'name' => 'Super Admin',
-            'code' => AdminUser::ROLE_SUPER_ADMIN,
-            'created_at' => $now,
-            'updated_at' => $now,
-        ],
-    );
-    $rid = (int) DB::table('admin_roles')->where('slug', AdminUser::ROLE_SUPER_ADMIN)->value('id');
-    $siteId = (int) DB::table('admin_sites')->where('is_default', true)->value('id');
-
-    DB::table('admin_user_site_roles')->updateOrInsert(
-        [
-            'admin_user_id' => $admin->id,
-            'site_id' => $siteId,
-            'role_id' => $rid,
-        ],
-        ['granted_at' => $now],
-    );
+    \App\Support\PlatformSystemRoles::ensureSuperAdminRole();
+    \App\Support\SuperAdminAccount::assign($admin);
 }
 
 /** 为后台测试账号挂上代理节点（需已存在 agent_nodes / admin_user_agents 表）。 */
diff --git a/tests/Unit/SiteAdminDefaultRolePermissionsTest.php b/tests/Unit/SiteAdminDefaultRolePermissionsTest.php
new file mode 100644
index 0000000..cac4be8
--- /dev/null
+++ b/tests/Unit/SiteAdminDefaultRolePermissionsTest.php
@@ -0,0 +1,13 @@
+<?php
+
+use App\Support\SiteAdminDefaultRolePermissions;
+
+test('site admin template includes dashboard and settlement manage', function (): void {
+    $slugs = SiteAdminDefaultRolePermissions::templateSlugs();
+
+    expect($slugs)
+        ->toContain('prd.dashboard.view')
+        ->toContain('prd.agent.manage')
+        ->toContain('prd.settlement.agent.manage')
+        ->toContain('prd.report.view');
+});