diff --git a/app/Http/Controllers/Auth/DingTalkLogin.php b/app/Http/Controllers/Auth/DingTalkLogin.php
new file mode 100644
index 00000000..c881139d
--- /dev/null
+++ b/app/Http/Controllers/Auth/DingTalkLogin.php
@@ -0,0 +1,130 @@
+<?php
+
+namespace App\Http\Controllers\Auth;
+
+use App\Abstracts\Http\Controller;
+use App\Models\Auth\DingTalkIdentity;
+use App\Models\Auth\DingTalkOAuthState;
+use App\Services\Auth\DingTalkOAuthClient;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
+use Illuminate\Support\Str;
+use Throwable;
+
+class DingTalkLogin extends Controller
+{
+    public function redirect(DingTalkOAuthClient $client): RedirectResponse
+    {
+        if (! $client->isConfigured()) {
+            return redirect()->route('login')->with('dingtalk_error', trans('auth.dingtalk.unavailable'));
+        }
+
+        DingTalkOAuthState::query()
+            ->where('expires_at', '<', now()->subDay())
+            ->delete();
+
+        $state = Str::random(64);
+        DingTalkOAuthState::query()->create([
+            'state_hash' => hash('sha256', $state),
+            'expires_at' => now()->addMinutes(max(1, (int) config('dingtalk.state_ttl_minutes', 5))),
+        ]);
+
+        return redirect()->away($client->authorizationUrl($state));
+    }
+
+    public function callback(Request $request, DingTalkOAuthClient $client): RedirectResponse
+    {
+        $stateValue = trim((string) $request->query('state', ''));
+        $authorizationCode = trim((string) ($request->query('authCode') ?: $request->query('code', '')));
+
+        if ($stateValue === '' || $authorizationCode === '') {
+            return $this->failed();
+        }
+
+        $state = DB::transaction(function () use ($stateValue): ?DingTalkOAuthState {
+            $candidate = DingTalkOAuthState::query()
+                ->where('state_hash', hash('sha256', $stateValue))
+                ->lockForUpdate()
+                ->first();
+
+            if (! $candidate || $candidate->consumed_at || $candidate->expires_at->isPast()) {
+                return null;
+            }
+
+            $candidate->forceFill(['consumed_at' => now()])->save();
+
+            return $candidate;
+        });
+
+        if (! $state) {
+            return $this->failed();
+        }
+
+        try {
+            $token = $client->exchangeAuthorizationCode($authorizationCode);
+            $profile = $client->currentUser($token['access_token']);
+        } catch (Throwable $exception) {
+            Log::warning('DingTalk login failed while resolving the authorized user.', [
+                'exception' => $exception::class,
+            ]);
+
+            return $this->failed();
+        }
+
+        $identity = DingTalkIdentity::query()
+            ->with('user')
+            ->where('union_id', $profile['union_id'])
+            ->first();
+
+        if ($identity) {
+            return $this->loginBoundUser($request, $identity, $profile);
+        }
+
+        $bindingToken = Str::random(64);
+        $state->forceFill([
+            'binding_token_hash' => hash('sha256', $bindingToken),
+            'union_id' => $profile['union_id'],
+            'open_id' => $profile['open_id'],
+            'nickname' => $profile['nickname'],
+            'expires_at' => now()->addMinutes(max(1, (int) config('dingtalk.binding_ttl_minutes', 10))),
+        ])->save();
+
+        return redirect()->route('login', ['dingtalk_binding' => $bindingToken])
+            ->with('dingtalk_binding', trans('auth.dingtalk.confirm_binding'));
+    }
+
+    protected function loginBoundUser(Request $request, DingTalkIdentity $identity, array $profile): RedirectResponse
+    {
+        $user = $identity->user;
+        $company = $user?->withoutEvents(fn () => $user->companies()->enabled()->first());
+
+        if (! $user || ! $user->enabled || ! $company) {
+            Log::info('DingTalk login denied for a disabled or unassigned account.', [
+                'identity_id' => $identity->id,
+            ]);
+
+            return $this->failed();
+        }
+
+        Auth::login($user, true);
+        $request->session()->regenerate();
+
+        $identity->forceFill([
+            'open_id' => $profile['open_id'] ?: $identity->open_id,
+            'nickname' => $profile['nickname'] ?: $identity->nickname,
+            'last_logged_in_at' => now(),
+        ])->save();
+
+        $url = route($user->landing_page, ['company_id' => $company->id]);
+
+        return redirect()->intended($url);
+    }
+
+    protected function failed(): RedirectResponse
+    {
+        return redirect()->route('login')->with('dingtalk_error', trans('auth.dingtalk.failed'));
+    }
+}
diff --git a/app/Http/Controllers/Auth/Login.php b/app/Http/Controllers/Auth/Login.php
index 07453c7e..8392e78b 100644
--- a/app/Http/Controllers/Auth/Login.php
+++ b/app/Http/Controllers/Auth/Login.php
@@ -4,6 +4,7 @@ namespace App\Http\Controllers\Auth;
 
 use App\Abstracts\Http\Controller;
 use App\Http\Requests\Auth\Login as Request;
+use App\Services\Auth\DingTalkIdentityBinder;
 use Illuminate\Foundation\Auth\AuthenticatesUsers;
 use Illuminate\Support\Facades\Log;
 use Illuminate\Support\Str;
@@ -75,6 +76,11 @@ class Login extends Controller
             return $this->respondLoginFailed();
         }
 
+        $dingtalkBound = app(DingTalkIdentityBinder::class)->bindFromToken(
+            $request->input('dingtalk_binding'),
+            $user
+        );
+
         // Redirect to portal if is customer
         if ($user->isCustomer()) {
             $path = session('url.intended', '');
@@ -88,7 +94,7 @@ class Login extends Controller
                 'status' => null,
                 'success' => true,
                 'error' => false,
-                'message' => trans('auth.login_redirect'),
+                'message' => $dingtalkBound ? trans('auth.dingtalk.bound') : trans('auth.login_redirect'),
                 'data' => null,
                 'redirect' => url($path),
             ]);
@@ -101,7 +107,7 @@ class Login extends Controller
             'status' => null,
             'success' => true,
             'error' => false,
-            'message' => trans('auth.login_redirect'),
+            'message' => $dingtalkBound ? trans('auth.dingtalk.bound') : trans('auth.login_redirect'),
             'data' => null,
             'redirect' => redirect()->intended($url)->getTargetUrl(),
         ]);
diff --git a/app/Http/Requests/Auth/Login.php b/app/Http/Requests/Auth/Login.php
index 27b87f7b..6a7ddd33 100644
--- a/app/Http/Requests/Auth/Login.php
+++ b/app/Http/Requests/Auth/Login.php
@@ -26,6 +26,7 @@ class Login extends FormRequest
         return [
             'email' => 'required|email',
             'password' => 'required',
+            'dingtalk_binding' => 'nullable|string|max:255',
         ];
     }
 }
diff --git a/app/Models/Auth/DingTalkIdentity.php b/app/Models/Auth/DingTalkIdentity.php
new file mode 100644
index 00000000..3459a534
--- /dev/null
+++ b/app/Models/Auth/DingTalkIdentity.php
@@ -0,0 +1,28 @@
+<?php
+
+namespace App\Models\Auth;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class DingTalkIdentity extends Model
+{
+    protected $table = 'dingtalk_identities';
+
+    protected $fillable = [
+        'user_id',
+        'union_id',
+        'open_id',
+        'nickname',
+        'last_logged_in_at',
+    ];
+
+    protected $casts = [
+        'last_logged_in_at' => 'datetime',
+    ];
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+}
diff --git a/app/Models/Auth/DingTalkOAuthState.php b/app/Models/Auth/DingTalkOAuthState.php
new file mode 100644
index 00000000..0cc587ff
--- /dev/null
+++ b/app/Models/Auth/DingTalkOAuthState.php
@@ -0,0 +1,25 @@
+<?php
+
+namespace App\Models\Auth;
+
+use Illuminate\Database\Eloquent\Model;
+
+class DingTalkOAuthState extends Model
+{
+    protected $table = 'dingtalk_oauth_states';
+
+    protected $fillable = [
+        'state_hash',
+        'binding_token_hash',
+        'union_id',
+        'open_id',
+        'nickname',
+        'expires_at',
+        'consumed_at',
+    ];
+
+    protected $casts = [
+        'expires_at' => 'datetime',
+        'consumed_at' => 'datetime',
+    ];
+}
diff --git a/app/Models/Auth/User.php b/app/Models/Auth/User.php
index 2c85f01c..9346684d 100644
--- a/app/Models/Auth/User.php
+++ b/app/Models/Auth/User.php
@@ -78,6 +78,11 @@ class User extends Authenticatable implements HasLocalePreference
         return $this->belongsToMany('App\Models\Common\Company', 'App\Models\Auth\UserCompany');
     }
 
+    public function dingtalkIdentity()
+    {
+        return $this->hasOne(DingTalkIdentity::class, 'user_id');
+    }
+
     public function contact()
     {
         return $this->hasOne('App\Models\Common\Contact', 'user_id', 'id');
diff --git a/app/Services/Auth/DingTalkIdentityBinder.php b/app/Services/Auth/DingTalkIdentityBinder.php
new file mode 100644
index 00000000..0f155cb0
--- /dev/null
+++ b/app/Services/Auth/DingTalkIdentityBinder.php
@@ -0,0 +1,52 @@
+<?php
+
+namespace App\Services\Auth;
+
+use App\Models\Auth\DingTalkIdentity;
+use App\Models\Auth\DingTalkOAuthState;
+use App\Models\Auth\User;
+use Illuminate\Support\Facades\DB;
+
+class DingTalkIdentityBinder
+{
+    public function bindFromToken(?string $token, User $user): bool
+    {
+        if (! is_string($token) || trim($token) === '') {
+            return false;
+        }
+
+        return DB::transaction(function () use ($token, $user): bool {
+            $state = DingTalkOAuthState::query()
+                ->where('binding_token_hash', hash('sha256', $token))
+                ->lockForUpdate()
+                ->first();
+
+            if (! $state || $state->expires_at->isPast() || ! $state->union_id) {
+                return false;
+            }
+
+            $unionOwner = DingTalkIdentity::query()->where('union_id', $state->union_id)->first();
+            if ($unionOwner && (int) $unionOwner->user_id !== (int) $user->id) {
+                return false;
+            }
+
+            $userIdentity = DingTalkIdentity::query()->where('user_id', $user->id)->first();
+            if ($userIdentity && $userIdentity->union_id !== $state->union_id) {
+                return false;
+            }
+
+            DingTalkIdentity::query()->updateOrCreate(
+                ['user_id' => $user->id],
+                [
+                    'union_id' => $state->union_id,
+                    'open_id' => $state->open_id,
+                    'nickname' => $state->nickname,
+                ]
+            );
+
+            $state->forceFill(['binding_token_hash' => null])->save();
+
+            return true;
+        });
+    }
+}
diff --git a/app/Services/Auth/DingTalkOAuthClient.php b/app/Services/Auth/DingTalkOAuthClient.php
new file mode 100644
index 00000000..16c832de
--- /dev/null
+++ b/app/Services/Auth/DingTalkOAuthClient.php
@@ -0,0 +1,116 @@
+<?php
+
+namespace App\Services\Auth;
+
+use Illuminate\Http\Client\RequestException;
+use Illuminate\Support\Facades\Http;
+use RuntimeException;
+
+class DingTalkOAuthClient
+{
+    public function isConfigured(): bool
+    {
+        return (bool) config('dingtalk.enabled')
+            && $this->configuredString('dingtalk.client_id') !== ''
+            && $this->configuredString('dingtalk.client_secret') !== ''
+            && $this->configuredString('dingtalk.redirect_uri') !== '';
+    }
+
+    public function authorizationUrl(string $state): string
+    {
+        $this->ensureConfigured();
+
+        return rtrim($this->configuredString('dingtalk.authorize_url'), '?') . '?' . http_build_query([
+            'redirect_uri' => $this->configuredString('dingtalk.redirect_uri'),
+            'response_type' => 'code',
+            'client_id' => $this->configuredString('dingtalk.client_id'),
+            'scope' => 'openid',
+            'prompt' => 'consent',
+            'state' => $state,
+        ], '', '&', PHP_QUERY_RFC3986);
+    }
+
+    /**
+     * @return array{access_token: string, expires_in: int|null}
+     */
+    public function exchangeAuthorizationCode(string $code): array
+    {
+        $this->ensureConfigured();
+
+        try {
+            $response = Http::asJson()
+                ->acceptJson()
+                ->timeout($this->timeout())
+                ->post($this->configuredString('dingtalk.token_url'), [
+                    'clientId' => $this->configuredString('dingtalk.client_id'),
+                    'clientSecret' => $this->configuredString('dingtalk.client_secret'),
+                    'code' => $code,
+                    'grantType' => 'authorization_code',
+                ])
+                ->throw();
+        } catch (RequestException $exception) {
+            throw new RuntimeException('DingTalk token exchange failed.', 0, $exception);
+        }
+
+        $accessToken = trim((string) $response->json('accessToken'));
+        if ($accessToken === '') {
+            throw new RuntimeException('DingTalk token response did not contain an access token.');
+        }
+
+        return [
+            'access_token' => $accessToken,
+            'expires_in' => is_numeric($response->json('expireIn')) ? (int) $response->json('expireIn') : null,
+        ];
+    }
+
+    /**
+     * @return array{union_id: string, open_id: string|null, nickname: string|null}
+     */
+    public function currentUser(string $accessToken): array
+    {
+        try {
+            $response = Http::acceptJson()
+                ->withHeaders(['x-acs-dingtalk-access-token' => $accessToken])
+                ->timeout($this->timeout())
+                ->get($this->configuredString('dingtalk.user_url'))
+                ->throw();
+        } catch (RequestException $exception) {
+            throw new RuntimeException('DingTalk user lookup failed.', 0, $exception);
+        }
+
+        $unionId = trim((string) $response->json('unionId'));
+        if ($unionId === '') {
+            throw new RuntimeException('DingTalk user response did not contain a union id.');
+        }
+
+        return [
+            'union_id' => $unionId,
+            'open_id' => $this->nullableString($response->json('openId')),
+            'nickname' => $this->nullableString($response->json('nick')),
+        ];
+    }
+
+    protected function ensureConfigured(): void
+    {
+        if (! $this->isConfigured()) {
+            throw new RuntimeException('DingTalk login is not configured.');
+        }
+    }
+
+    protected function configuredString(string $key): string
+    {
+        return trim((string) config($key, ''));
+    }
+
+    protected function timeout(): int
+    {
+        return max(3, min(30, (int) config('dingtalk.timeout', 10)));
+    }
+
+    protected function nullableString(mixed $value): ?string
+    {
+        $value = trim((string) $value);
+
+        return $value === '' ? null : $value;
+    }
+}
diff --git a/config/dingtalk.php b/config/dingtalk.php
new file mode 100644
index 00000000..1b798326
--- /dev/null
+++ b/config/dingtalk.php
@@ -0,0 +1,20 @@
+<?php
+
+return [
+    'enabled' => (bool) env('DINGTALK_LOGIN_ENABLED', false),
+
+    'client_id' => env('DINGTALK_CLIENT_ID'),
+    'client_secret' => env('DINGTALK_CLIENT_SECRET'),
+    'redirect_uri' => env(
+        'DINGTALK_REDIRECT_URI',
+        'http://218.93.190.75:8442/auth/dingtalk/callback'
+    ),
+
+    'authorize_url' => env('DINGTALK_AUTHORIZE_URL', 'https://login.dingtalk.com/oauth2/auth'),
+    'token_url' => env('DINGTALK_TOKEN_URL', 'https://api.dingtalk.com/v1.0/oauth2/userAccessToken'),
+    'user_url' => env('DINGTALK_USER_URL', 'https://api.dingtalk.com/v1.0/contact/users/me'),
+
+    'timeout' => (int) env('DINGTALK_HTTP_TIMEOUT', 10),
+    'state_ttl_minutes' => (int) env('DINGTALK_STATE_TTL_MINUTES', 5),
+    'binding_ttl_minutes' => (int) env('DINGTALK_BINDING_TTL_MINUTES', 10),
+];
diff --git a/database/migrations/2026_09_03_000000_create_dingtalk_login_tables.php b/database/migrations/2026_09_03_000000_create_dingtalk_login_tables.php
new file mode 100644
index 00000000..77a8d7d4
--- /dev/null
+++ b/database/migrations/2026_09_03_000000_create_dingtalk_login_tables.php
@@ -0,0 +1,47 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        if (! Schema::hasTable('dingtalk_identities')) {
+            Schema::create('dingtalk_identities', function (Blueprint $table): void {
+                $table->bigIncrements('id');
+                $table->unsignedInteger('user_id')->unique();
+                $table->string('union_id', 128)->unique();
+                $table->string('open_id', 128)->nullable()->index();
+                $table->string('nickname', 191)->nullable();
+                $table->timestamp('last_logged_in_at')->nullable();
+                $table->timestamps();
+
+                $table->foreign('user_id')->references('id')->on('users')->cascadeOnDelete();
+            });
+        }
+
+        if (! Schema::hasTable('dingtalk_oauth_states')) {
+            Schema::create('dingtalk_oauth_states', function (Blueprint $table): void {
+                $table->bigIncrements('id');
+                $table->char('state_hash', 64)->unique();
+                $table->char('binding_token_hash', 64)->nullable()->unique();
+                $table->string('union_id', 128)->nullable();
+                $table->string('open_id', 128)->nullable();
+                $table->string('nickname', 191)->nullable();
+                $table->timestamp('expires_at');
+                $table->timestamp('consumed_at')->nullable();
+                $table->timestamps();
+
+                $table->index(['expires_at', 'consumed_at']);
+            });
+        }
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('dingtalk_oauth_states');
+        Schema::dropIfExists('dingtalk_identities');
+    }
+};
diff --git a/deploy/configure-dingtalk-callback.sh b/deploy/configure-dingtalk-callback.sh
new file mode 100644
index 00000000..b8627dca
--- /dev/null
+++ b/deploy/configure-dingtalk-callback.sh
@@ -0,0 +1,50 @@
+#!/bin/sh
+set -eu
+
+SERVER_IP="${1:?SERVER_IP is required}"
+REMOTE_DIR="${2:-/opt/caiwuxitong}"
+SOURCE_CONFIG="$REMOTE_DIR/host-nginx-8442-dingtalk.conf"
+TARGET_CONFIG="/etc/nginx/conf.d/caiwuxitong-backend-8442.conf"
+BACKUP_DIR="$REMOTE_DIR/backups/nginx-dingtalk-callback-$(date +%Y%m%d-%H%M%S)"
+
+if [ "$(id -u)" -ne 0 ]; then
+    echo "configure-dingtalk-callback.sh must run as root" >&2
+    exit 1
+fi
+
+if [ "$SERVER_IP" != "218.93.190.75" ]; then
+    echo "Refusing to configure an unexpected server IP: $SERVER_IP" >&2
+    exit 1
+fi
+
+test -s "$SOURCE_CONFIG"
+test -s "$TARGET_CONFIG"
+test -s /etc/nginx/caiwuxitong-backend.crt
+test -s /etc/nginx/caiwuxitong-backend.key
+
+install -d -m 700 "$BACKUP_DIR"
+install -m 600 "$TARGET_CONFIG" "$BACKUP_DIR/caiwuxitong-backend-8442.conf"
+install -m 644 "$SOURCE_CONFIG" "$TARGET_CONFIG"
+
+if ! nginx -t; then
+    install -m 644 "$BACKUP_DIR/caiwuxitong-backend-8442.conf" "$TARGET_CONFIG"
+    nginx -t
+    echo "Nginx validation failed; the previous configuration was restored." >&2
+    exit 1
+fi
+
+systemctl reload nginx
+
+status="$(curl -sS -o /dev/null -w '%{http_code}' --max-time 15 \
+    "http://$SERVER_IP:8442/auth/dingtalk/callback?state=configuration-probe")"
+
+if [ "$status" = "308" ] || [ "$status" = "400" ] || [ "$status" = "000" ]; then
+    install -m 644 "$BACKUP_DIR/caiwuxitong-backend-8442.conf" "$TARGET_CONFIG"
+    nginx -t
+    systemctl reload nginx
+    echo "DingTalk HTTP callback probe failed with status $status; the previous configuration was restored." >&2
+    exit 1
+fi
+
+echo "DINGTALK_HTTP_CALLBACK_READY=http://$SERVER_IP:8442/auth/dingtalk/callback"
+echo "NGINX_BACKUP=$BACKUP_DIR/caiwuxitong-backend-8442.conf"
diff --git a/deploy/host-nginx-8442-dingtalk.conf b/deploy/host-nginx-8442-dingtalk.conf
new file mode 100644
index 00000000..3a0992ac
--- /dev/null
+++ b/deploy/host-nginx-8442-dingtalk.conf
@@ -0,0 +1,76 @@
+server {
+    listen 8442 ssl default_server;
+    listen [::]:8442 ssl default_server;
+    server_name 218.93.190.75;
+    ssl_certificate /etc/nginx/caiwuxitong-backend.crt;
+    ssl_certificate_key /etc/nginx/caiwuxitong-backend.key;
+    ssl_session_cache shared:CAIWU_BACKEND_SSL:2m;
+    ssl_session_timeout 10m;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    client_max_body_size 12m;
+
+    # Plain HTTP is accepted only for the DingTalk OAuth callback registered
+    # by the enterprise administrator. Every other HTTP request keeps the
+    # existing HTTPS redirect behavior.
+    error_page 497 = @plain_http_request;
+
+    location @plain_http_request {
+        if ($uri != /auth/dingtalk/callback) {
+            return 308 https://218.93.190.75:8442$request_uri;
+        }
+
+        proxy_pass http://127.0.0.1:18088;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_set_header X-Forwarded-Port 8442;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto http;
+        proxy_read_timeout 30s;
+    }
+
+    location / {
+        proxy_pass http://127.0.0.1:18088;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Forwarded-Host $host;
+        proxy_set_header X-Forwarded-Port 8442;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto https;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_read_timeout 120s;
+    }
+}
+
+server {
+    listen 8442 ssl;
+    listen [::]:8442 ssl;
+    server_name 118.196.84.79;
+    ssl_certificate /etc/nginx/caiwuxitong-backend.crt;
+    ssl_certificate_key /etc/nginx/caiwuxitong-backend.key;
+    ssl_session_cache shared:CAIWU_BACKEND_SSL:2m;
+    ssl_session_timeout 10m;
+    ssl_protocols TLSv1.2 TLSv1.3;
+    client_max_body_size 12m;
+    allow 127.0.0.1;
+    allow ::1;
+    allow 118.196.84.79;
+    deny all;
+
+    location / {
+        proxy_pass http://127.0.0.1:18088;
+        proxy_http_version 1.1;
+        proxy_set_header Host 218.93.190.75;
+        proxy_set_header X-Forwarded-Host 218.93.190.75;
+        proxy_set_header X-Forwarded-Port 443;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto https;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection "upgrade";
+        proxy_read_timeout 120s;
+    }
+}
diff --git a/docker-compose.local.yml b/docker-compose.local.yml
index ca5554a3..121a9284 100644
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -28,6 +28,7 @@ services:
       - ./app:/var/www/html/app
       - ./config:/var/www/html/config
       - ./database:/var/www/html/database
+      - ./deploy:/var/www/html/deploy
       - ./modules:/var/www/html/modules
       - ./resources:/var/www/html/resources
       - ./routes:/var/www/html/routes
diff --git a/resources/lang/en-GB/auth.php b/resources/lang/en-GB/auth.php
index 8a823068..f07cf20c 100644
--- a/resources/lang/en-GB/auth.php
+++ b/resources/lang/en-GB/auth.php
@@ -48,6 +48,15 @@ return [
     'throttle'              => 'Too many login attempts. Please try again in :seconds seconds.',
     'disabled'              => 'This account is disabled. Please, contact the system administrator.',
 
+    'dingtalk' => [
+        'login' => 'Sign in with DingTalk',
+        'or' => 'or',
+        'unavailable' => 'DingTalk sign-in is not enabled. Please use email and password.',
+        'failed' => 'DingTalk sign-in did not complete. Please start the authorization again.',
+        'confirm_binding' => 'For the first DingTalk sign-in, enter your existing account and password to confirm the binding.',
+        'bound' => 'DingTalk account linked. Redirecting…',
+    ],
+
     'notification' => [
         'message_1'         => 'You are receiving this email because we received a password reset request for your account.',
         'message_2'         => 'If you did not request a password reset, no further action is required.',
diff --git a/resources/lang/zh-CN/auth.php b/resources/lang/zh-CN/auth.php
index 6a3b0f50..3d8bb186 100644
--- a/resources/lang/zh-CN/auth.php
+++ b/resources/lang/zh-CN/auth.php
@@ -48,6 +48,15 @@ return [
     'throttle'              => '尝试登录次数过多。请在 :seconds 秒后重试。',
     'disabled'              => '此账号已被停用。请联系系统管理员。',
 
+    'dingtalk' => [
+        'login' => '使用钉钉登录',
+        'or' => '或',
+        'unavailable' => '钉钉登录尚未启用，请暂时使用邮箱密码登录。',
+        'failed' => '钉钉登录未完成，请重新发起授权。',
+        'confirm_binding' => '首次使用钉钉登录，请输入现有财务系统账号和密码完成绑定。',
+        'bound' => '钉钉账号绑定成功，正在为您跳转……',
+    ],
+
     'notification' => [
         'message_1'         => '您收到此邮件是因为我们收到了您账户的密码重置请求。',
         'message_2'         => '如果您未请求重置密码，则无需进一步操作。',
diff --git a/resources/views/auth/login/create.blade.php b/resources/views/auth/login/create.blade.php
index 0e7c364b..ec189814 100644
--- a/resources/views/auth/login/create.blade.php
+++ b/resources/views/auth/login/create.blade.php
@@ -24,7 +24,23 @@
             v-cloak
         ></div>
 
+        @if (session('dingtalk_error'))
+            <div class="w-full border border-red-200 bg-red-50 text-red-700 p-3 rounded-lg font-semibold text-xs my-3">
+                {{ session('dingtalk_error') }}
+            </div>
+        @endif
+
+        @if (session('dingtalk_binding') || request('dingtalk_binding'))
+            <div class="w-full border border-amber-200 bg-amber-50 text-amber-800 p-3 rounded-lg font-semibold text-xs my-3">
+                {{ session('dingtalk_binding', trans('auth.dingtalk.confirm_binding')) }}
+            </div>
+        @endif
+
         <x-form id="auth" route="login">
+            @if (request('dingtalk_binding'))
+                <input type="hidden" name="dingtalk_binding" value="{{ request('dingtalk_binding') }}">
+            @endif
+
             <div class="grid sm:grid-cols-6 gap-x-8 gap-y-6 my-3.5 lg:h-64">
                 <x-form.group.email
                     name="email"
@@ -75,6 +91,21 @@
                 </x-button>
             </div>
         </x-form>
+
+        @if (config('dingtalk.enabled') && config('dingtalk.client_id') && config('dingtalk.client_secret'))
+            <div class="flex items-center gap-3 my-5" aria-hidden="true">
+                <span class="h-px flex-1 bg-gray-200"></span>
+                <span class="text-xs text-gray-500">{{ trans('auth.dingtalk.or') }}</span>
+                <span class="h-px flex-1 bg-gray-200"></span>
+            </div>
+
+            <a href="{{ route('login.dingtalk') }}"
+               class="w-full h-9 inline-flex items-center justify-center gap-2 border border-[#856632] bg-white text-[#856632] hover:bg-[#F7F0DE] focus:outline-none focus:ring-2 focus:ring-[#856632]/20 rounded-lg text-sm font-semibold"
+            >
+                <span class="material-icons-outlined text-base" aria-hidden="true">qr_code_scanner</span>
+                {{ trans('auth.dingtalk.login') }}
+            </a>
+        @endif
     </x-slot>
 
     <x-script folder="auth" file="common" />
diff --git a/routes/guest.php b/routes/guest.php
index 5773bfad..fa22916f 100644
--- a/routes/guest.php
+++ b/routes/guest.php
@@ -12,6 +12,8 @@ use Illuminate\Support\Facades\Route;
 Route::group(['prefix' => 'auth'], function () {
     Route::get('login', 'Auth\Login@create')->name('login');
     Route::post('login', 'Auth\Login@store')->name('login.store');
+    Route::get('dingtalk', 'Auth\DingTalkLogin@redirect')->name('login.dingtalk');
+    Route::get('dingtalk/callback', 'Auth\DingTalkLogin@callback')->name('login.dingtalk.callback');
 
     Route::get('forgot', 'Auth\Forgot@create')->name('forgot');
     Route::post('forgot', 'Auth\Forgot@store')->name('forgot.store');
diff --git a/scripts/deploy-from-workstation.ps1 b/scripts/deploy-from-workstation.ps1
index 8c547b09..d05e0829 100644
--- a/scripts/deploy-from-workstation.ps1
+++ b/scripts/deploy-from-workstation.ps1
@@ -20,6 +20,7 @@ param(
     [int]$BuildCacheMaxAgeHours = 720,
     [switch]$BootstrapServer,
     [switch]$ConfigureHttps,
+    [switch]$ConfigureDingTalkCallback,
     [switch]$AllowNonMain,
     [switch]$AllowMigrations
 )
@@ -403,6 +404,8 @@ try {
             deploy/config-db-init.sh `
             deploy/update-runtime-url.sh `
             deploy/setup-https.sh `
+            deploy/configure-dingtalk-callback.sh `
+            deploy/host-nginx-8442-dingtalk.conf `
             deploy/host-nginx-http.conf `
             deploy/host-nginx.conf `
             deploy/setup-incremental-registry.sh `
@@ -520,6 +523,12 @@ try {
         } '服务器 HTTPS 配置或证书申请失败。'
     }
 
+    if ($ConfigureDingTalkCallback) {
+        Invoke-Native {
+            ssh -i $keyFullPath -o BatchMode=yes $sshTarget "chmod 700 '$RemotePath/configure-dingtalk-callback.sh' && '$RemotePath/configure-dingtalk-callback.sh' '$Server' '$RemotePath'"
+        } '钉钉 HTTP 回调 Nginx 配置失败。'
+    }
+
     Remove-OldProjectImages -CurrentImage $fullImage
     Write-Host "发布完成：$fullImage -> $AppUrl"
 }
diff --git a/tests/Feature/Auth/DingTalkLoginTest.php b/tests/Feature/Auth/DingTalkLoginTest.php
new file mode 100644
index 00000000..84b2543a
--- /dev/null
+++ b/tests/Feature/Auth/DingTalkLoginTest.php
@@ -0,0 +1,183 @@
+<?php
+
+namespace Tests\Feature\Auth;
+
+use App\Models\Auth\DingTalkIdentity;
+use App\Models\Auth\DingTalkOAuthState;
+use Illuminate\Http\Client\Request as ClientRequest;
+use Illuminate\Support\Facades\Http;
+use Tests\Feature\FeatureTestCase;
+
+class DingTalkLoginTest extends FeatureTestCase
+{
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        config([
+            'dingtalk.enabled' => true,
+            'dingtalk.client_id' => 'test-client-id',
+            'dingtalk.client_secret' => 'test-client-secret',
+            'dingtalk.redirect_uri' => 'http://218.93.190.75:8442/auth/dingtalk/callback',
+            'dingtalk.authorize_url' => 'https://login.dingtalk.test/oauth2/auth',
+            'dingtalk.token_url' => 'https://api.dingtalk.test/v1.0/oauth2/userAccessToken',
+            'dingtalk.user_url' => 'https://api.dingtalk.test/v1.0/contact/users/me',
+        ]);
+    }
+
+    public function test_login_page_shows_dingtalk_entry_when_configured(): void
+    {
+        $this->get(route('login'))
+            ->assertOk()
+            ->assertSeeText(trans('auth.dingtalk.login'));
+    }
+
+    public function test_redirect_creates_hashed_state_and_uses_registered_http_callback(): void
+    {
+        $response = $this->get(route('login.dingtalk'))->assertRedirect();
+        parse_str((string) parse_url($response->headers->get('Location'), PHP_URL_QUERY), $query);
+
+        $this->assertSame('test-client-id', $query['client_id']);
+        $this->assertSame('openid', $query['scope']);
+        $this->assertSame(config('dingtalk.redirect_uri'), $query['redirect_uri']);
+        $this->assertDatabaseHas('dingtalk_oauth_states', [
+            'state_hash' => hash('sha256', $query['state']),
+            'consumed_at' => null,
+        ]);
+        $this->assertDatabaseMissing('dingtalk_oauth_states', ['state_hash' => $query['state']]);
+    }
+
+    public function test_bound_identity_logs_in_without_storing_access_token(): void
+    {
+        Http::preventStrayRequests();
+        Http::fake($this->dingtalkResponses('union-bound', 'open-bound'));
+
+        DingTalkIdentity::query()->create([
+            'user_id' => $this->user->id,
+            'union_id' => 'union-bound',
+        ]);
+
+        $state = $this->startAuthorization();
+
+        $this->get(route('login.dingtalk.callback', [
+            'authCode' => 'authorization-code',
+            'state' => $state,
+        ]))->assertRedirect();
+
+        $this->assertAuthenticatedAs($this->user);
+        $this->assertDatabaseHas('dingtalk_identities', [
+            'user_id' => $this->user->id,
+            'union_id' => 'union-bound',
+            'open_id' => 'open-bound',
+        ]);
+
+        $this->assertFalse(
+            collect(DingTalkOAuthState::query()->first()->getAttributes())
+                ->contains(fn ($value) => is_string($value) && str_contains($value, 'access-token'))
+        );
+
+        Http::assertSent(function (ClientRequest $request): bool {
+            if ($request->url() === 'https://api.dingtalk.test/v1.0/oauth2/userAccessToken') {
+                return $request->method() === 'POST'
+                    && $request['clientId'] === 'test-client-id'
+                    && $request['clientSecret'] === 'test-client-secret'
+                    && $request['code'] === 'authorization-code'
+                    && $request['grantType'] === 'authorization_code';
+            }
+
+            if ($request->url() === 'https://api.dingtalk.test/v1.0/contact/users/me') {
+                return $request->hasHeader('x-acs-dingtalk-access-token', 'access-token-not-persisted');
+            }
+
+            return false;
+        });
+        Http::assertSentCount(2);
+    }
+
+    public function test_first_authorization_binds_only_after_existing_password_login(): void
+    {
+        Http::preventStrayRequests();
+        Http::fake($this->dingtalkResponses('union-new', 'open-new'));
+
+        $password = 'KnownPassword123!';
+        $this->user->password = $password;
+        $this->user->save();
+
+        $state = $this->startAuthorization();
+        $callback = $this->get(route('login.dingtalk.callback', [
+            'code' => 'authorization-code',
+            'state' => $state,
+        ]))->assertRedirect();
+
+        parse_str((string) parse_url($callback->headers->get('Location'), PHP_URL_QUERY), $query);
+        $bindingToken = $query['dingtalk_binding'];
+
+        $this->assertGuest();
+        $this->assertDatabaseMissing('dingtalk_identities', ['union_id' => 'union-new']);
+        $this->assertDatabaseHas('dingtalk_oauth_states', [
+            'binding_token_hash' => hash('sha256', $bindingToken),
+            'union_id' => 'union-new',
+        ]);
+
+        $this->post(route('login.store'), [
+            'email' => $this->user->email,
+            'password' => $password,
+            'dingtalk_binding' => $bindingToken,
+        ])->assertOk()->assertJson(['success' => true]);
+
+        $this->assertAuthenticatedAs($this->user);
+        $this->assertDatabaseHas('dingtalk_identities', [
+            'user_id' => $this->user->id,
+            'union_id' => 'union-new',
+            'open_id' => 'open-new',
+        ]);
+        $this->assertDatabaseMissing('dingtalk_oauth_states', [
+            'binding_token_hash' => hash('sha256', $bindingToken),
+        ]);
+    }
+
+    public function test_expired_or_replayed_state_never_calls_dingtalk(): void
+    {
+        Http::preventStrayRequests();
+
+        $rawState = 'expired-state';
+        DingTalkOAuthState::query()->create([
+            'state_hash' => hash('sha256', $rawState),
+            'expires_at' => now()->subMinute(),
+        ]);
+
+        $this->get(route('login.dingtalk.callback', [
+            'code' => 'authorization-code',
+            'state' => $rawState,
+        ]))->assertRedirect(route('login'));
+
+        Http::assertNothingSent();
+        $this->assertGuest();
+    }
+
+    protected function startAuthorization(): string
+    {
+        $response = $this->get(route('login.dingtalk'))->assertRedirect();
+        parse_str((string) parse_url($response->headers->get('Location'), PHP_URL_QUERY), $query);
+
+        return $query['state'];
+    }
+
+    protected function dingtalkResponses(string $unionId, string $openId): callable
+    {
+        return function (ClientRequest $request) use ($unionId, $openId) {
+            return match ($request->url()) {
+                'https://api.dingtalk.test/v1.0/oauth2/userAccessToken' => Http::response([
+                    'accessToken' => 'access-token-not-persisted',
+                    'expireIn' => 7200,
+                ]),
+                'https://api.dingtalk.test/v1.0/contact/users/me' => Http::response([
+                    'unionId' => $unionId,
+                    'openId' => $openId,
+                    'nick' => '测试用户',
+                ]),
+                default => Http::response([], 404),
+            };
+        };
+    }
+}
diff --git a/tests/Unit/Deployment/DingTalkCallbackNginxTest.php b/tests/Unit/Deployment/DingTalkCallbackNginxTest.php
new file mode 100644
index 00000000..40509f7a
--- /dev/null
+++ b/tests/Unit/Deployment/DingTalkCallbackNginxTest.php
@@ -0,0 +1,27 @@
+<?php
+
+namespace Tests\Unit\Deployment;
+
+use PHPUnit\Framework\TestCase;
+
+class DingTalkCallbackNginxTest extends TestCase
+{
+    public function test_plain_http_is_limited_to_the_registered_dingtalk_callback(): void
+    {
+        $config = file_get_contents(base_path('deploy/host-nginx-8442-dingtalk.conf'));
+
+        $this->assertStringContainsString('error_page 497 = @plain_http_request;', $config);
+        $this->assertStringContainsString('if ($uri != /auth/dingtalk/callback)', $config);
+        $this->assertStringContainsString('proxy_set_header X-Forwarded-Proto http;', $config);
+        $this->assertStringContainsString('return 308 https://218.93.190.75:8442$request_uri;', $config);
+    }
+
+    public function test_configuration_script_validates_and_restores_on_failure(): void
+    {
+        $script = file_get_contents(base_path('deploy/configure-dingtalk-callback.sh'));
+
+        $this->assertStringContainsString('nginx -t', $script);
+        $this->assertStringContainsString('the previous configuration was restored', $script);
+        $this->assertStringContainsString('DINGTALK_HTTP_CALLBACK_READY=', $script);
+    }
+}