diff --git a/backend/apps/accounts/views.py b/backend/apps/accounts/views.py
index db8cecd..a11d299 100644
--- a/backend/apps/accounts/views.py
+++ b/backend/apps/accounts/views.py
@@ -241,6 +241,8 @@ def me_view(request):
             'token_price_video': float(config.base_token_price_video) * markup_mult,
             'token_price_fast': float(config.base_token_price_fast) * markup_mult,
             'token_price_fast_video': float(config.base_token_price_fast_video) * markup_mult,
+            'token_price_1080p': float(config.base_token_price_1080p) * markup_mult,
+            'token_price_1080p_video': float(config.base_token_price_1080p_video) * markup_mult,
             'is_active': team.is_active,
         }
         data['team_disabled'] = not team.is_active
diff --git a/backend/apps/generation/migrations/0020_quotaconfig_base_token_price_1080p_and_more.py b/backend/apps/generation/migrations/0020_quotaconfig_base_token_price_1080p_and_more.py
new file mode 100644
index 0000000..7183cd5
--- /dev/null
+++ b/backend/apps/generation/migrations/0020_quotaconfig_base_token_price_1080p_and_more.py
@@ -0,0 +1,41 @@
+# Generated by Django 4.2.29 on 2026-04-17 18:09
+
+from django.db import migrations, models
+
+
+def backfill_empty_resolution(apps, schema_editor):
+    """将历史 resolution='' 的记录回填为 '720p'（choices 约束前的旧数据）。"""
+    GenerationRecord = apps.get_model('generation', 'GenerationRecord')
+    GenerationRecord.objects.filter(resolution='').update(resolution='720p')
+
+
+def reverse_backfill(apps, schema_editor):
+    """回滚时不恢复为空字符串（历史数据无法精确识别）。"""
+    pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('generation', '0019_duration_nullable'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='quotaconfig',
+            name='base_token_price_1080p',
+            field=models.DecimalField(decimal_places=2, default=51, max_digits=10, verbose_name='1080P单价-不含视频(元/百万tokens)'),
+        ),
+        migrations.AddField(
+            model_name='quotaconfig',
+            name='base_token_price_1080p_video',
+            field=models.DecimalField(decimal_places=2, default=31, max_digits=10, verbose_name='1080P单价-含视频(元/百万tokens)'),
+        ),
+        # 先回填历史空值，再改 choices 约束，避免 MySQL 严格模式 IntegrityError
+        migrations.RunPython(backfill_empty_resolution, reverse_backfill),
+        migrations.AlterField(
+            model_name='generationrecord',
+            name='resolution',
+            field=models.CharField(choices=[('480p', '480P'), ('720p', '720P'), ('1080p', '1080P')], default='720p', max_length=10, verbose_name='分辨率'),
+        ),
+    ]
diff --git a/backend/apps/generation/models.py b/backend/apps/generation/models.py
index ffa19a3..f7f3ee0 100644
--- a/backend/apps/generation/models.py
+++ b/backend/apps/generation/models.py
@@ -19,6 +19,11 @@ class GenerationRecord(models.Model):
         ('completed', '已完成'),
         ('failed', '失败'),
     ]
+    RESOLUTION_CHOICES = [
+        ('480p', '480P'),
+        ('720p', '720P'),
+        ('1080p', '1080P'),
+    ]
 
     user = models.ForeignKey(
         settings.AUTH_USER_MODEL,
@@ -39,7 +44,7 @@ class GenerationRecord(models.Model):
     cost_amount = models.DecimalField(max_digits=12, decimal_places=2, default=0, verbose_name='用户费用(元)')
     base_cost_amount = models.DecimalField(max_digits=12, decimal_places=2, default=0, verbose_name='平台成本(元)')
     frozen_amount = models.DecimalField(max_digits=12, decimal_places=2, default=0, verbose_name='冻结金额(元)')
-    resolution = models.CharField(max_length=10, blank=True, default='', verbose_name='分辨率')
+    resolution = models.CharField(max_length=10, choices=RESOLUTION_CHOICES, default='720p', verbose_name='分辨率')
     status = models.CharField(max_length=20, choices=STATUS_CHOICES, default='queued', verbose_name='状态')
     result_url = models.CharField(max_length=1000, blank=True, default='', verbose_name='生成结果URL')
     thumbnail_url = models.CharField(max_length=1000, blank=True, default='', verbose_name='视频缩略图URL')
@@ -97,6 +102,8 @@ class QuotaConfig(models.Model):
     base_token_price_video = models.DecimalField(max_digits=10, decimal_places=2, default=28, verbose_name='基础token单价-含视频(元/百万tokens)')
     base_token_price_fast = models.DecimalField(max_digits=10, decimal_places=2, default=37, verbose_name='Fast单价-不含视频(元/百万tokens)')
     base_token_price_fast_video = models.DecimalField(max_digits=10, decimal_places=2, default=22, verbose_name='Fast单价-含视频(元/百万tokens)')
+    base_token_price_1080p = models.DecimalField(max_digits=10, decimal_places=2, default=51, verbose_name='1080P单价-不含视频(元/百万tokens)')
+    base_token_price_1080p_video = models.DecimalField(max_digits=10, decimal_places=2, default=31, verbose_name='1080P单价-含视频(元/百万tokens)')
     updated_at = models.DateTimeField(auto_now=True)
 
     class Meta:
diff --git a/backend/apps/generation/serializers.py b/backend/apps/generation/serializers.py
index 0b75884..2775497 100644
--- a/backend/apps/generation/serializers.py
+++ b/backend/apps/generation/serializers.py
@@ -5,8 +5,11 @@ class VideoGenerateSerializer(serializers.Serializer):
     prompt = serializers.CharField(required=False, allow_blank=True, default='')
     mode = serializers.ChoiceField(choices=['universal', 'keyframe'])
     model = serializers.ChoiceField(choices=['seedance_2.0', 'seedance_2.0_fast'])
-    aspect_ratio = serializers.CharField(max_length=10)
+    # 显式枚举拒绝 adaptive（火山默认值）— 估算/计费需要明确宽高
+    aspect_ratio = serializers.ChoiceField(choices=['16:9', '9:16', '4:3', '1:1', '3:4', '21:9'])
     duration = serializers.IntegerField()
+    # 1080p 仅 Seedance 2.0 支持，Fast 不支持 — 上层 video_generate_view 会做 model/resolution 组合校验
+    resolution = serializers.ChoiceField(choices=['480p', '720p', '1080p'], required=False, default='720p')
     references = serializers.ListField(child=serializers.DictField(), required=False, default=list)
 
 
@@ -40,6 +43,8 @@ class SystemSettingsSerializer(serializers.Serializer):
     base_token_price_video = serializers.DecimalField(max_digits=10, decimal_places=2, min_value=0, required=False)
     base_token_price_fast = serializers.DecimalField(max_digits=10, decimal_places=2, min_value=0, required=False)
     base_token_price_fast_video = serializers.DecimalField(max_digits=10, decimal_places=2, min_value=0, required=False)
+    base_token_price_1080p = serializers.DecimalField(max_digits=10, decimal_places=2, min_value=0, required=False)
+    base_token_price_1080p_video = serializers.DecimalField(max_digits=10, decimal_places=2, min_value=0, required=False)
     announcement = serializers.CharField(required=False, allow_blank=True, default='')
     announcement_enabled = serializers.BooleanField(required=False, default=False)
     max_desktop_sessions = serializers.IntegerField(min_value=1, required=False, default=1)
diff --git a/backend/apps/generation/views.py b/backend/apps/generation/views.py
index 92774d0..5f184e7 100644
--- a/backend/apps/generation/views.py
+++ b/backend/apps/generation/views.py
@@ -55,10 +55,38 @@ def _has_video_reference(references):
     return any(ref.get('type') == 'video' for ref in references)
 
 
-def _get_token_price(config, model, has_video_ref):
-    """根据模型和是否有视频参考选择单价。"""
+def _sum_video_duration(references):
+    """累加所有视频类型参考素材的 duration（秒），用于 token 估算的输入时长。"""
+    if not references:
+        return 0.0
+    total = 0.0
+    for ref in references:
+        if ref.get('type') == 'video':
+            try:
+                total += float(ref.get('duration') or 0)
+            except (ValueError, TypeError):
+                continue
+    return total
+
+
+def _get_token_price(config, model, has_video_ref, resolution):
+    """根据模型、是否含视频、分辨率选择单价。
+
+    约束（与官方文档一致）：
+    - Seedance 2.0 Fast 不支持 1080p — 此组合在 UI 层已阻止、VideoGenerateSerializer
+      也会在 video_generate_view 中拒绝。若仍进到这里，表示前端约束失效或绕过前端
+      直接调 API，应 fail loud，绝不按 720p 价静默降级（那是欺骗用户）。
+    - 1080p 仅 Seedance 2.0 使用独立单价（51/31）
+    - 480p 和 720p 共享同一单价
+    """
+    if model == 'seedance_2.0_fast' and resolution == '1080p':
+        raise ValueError(
+            'Seedance 2.0 Fast 不支持 1080p — 前端应阻止此组合，不应进到计价函数'
+        )
     if model == 'seedance_2.0_fast':
         return config.base_token_price_fast_video if has_video_ref else config.base_token_price_fast
+    if resolution == '1080p':
+        return config.base_token_price_1080p_video if has_video_ref else config.base_token_price_1080p
     return config.base_token_price_video if has_video_ref else config.base_token_price
 
 
@@ -175,15 +203,26 @@ def video_generate_view(request):
     mode = serializer.validated_data['mode']
     model = serializer.validated_data['model']
     aspect_ratio = serializer.validated_data['aspect_ratio']
+    # serializer 已设 default='720p' + choices 约束，validated_data 必有合法值
+    resolution = serializer.validated_data['resolution']
     search_mode = request.data.get('search_mode', 'off')
     seed = _safe_int(request.data.get('seed', -1), -1)
 
+    # 1080P 仅 Seedance 2.0 支持，Fast 不支持
+    if resolution == '1080p' and model == 'seedance_2.0_fast':
+        return Response({
+            'error': 'invalid_resolution',
+            'message': '1080P 仅支持 AirDrama 模型，AirDrama Fast 不支持 1080P，请切换模型或选择 720P',
+        }, status=status.HTTP_400_BAD_REQUEST)
+
     # ── 预估 token 和费用 ──
     config = QuotaConfig.objects.get_or_create(pk=1)[0]
-    w, h = get_resolution(aspect_ratio)
-    estimated_tokens = estimate_tokens(w, h, duration)
-    has_video_ref = _has_video_reference(request.data.get('references', []))
-    token_price = _get_token_price(config, model, has_video_ref)
+    references = request.data.get('references', [])
+    w, h = get_resolution(aspect_ratio, resolution)
+    has_video_ref = _has_video_reference(references)
+    input_video_dur = _sum_video_duration(references) if has_video_ref else 0
+    estimated_tokens = estimate_tokens(w, h, duration, input_video_duration=input_video_dur)
+    token_price = _get_token_price(config, model, has_video_ref, resolution)
     estimated_cost = calculate_cost(estimated_tokens, token_price, team.markup_percentage)
 
     # ── 所有额度检查在 transaction 内完成，select_for_update 串行化同团队请求 ──
@@ -447,7 +486,7 @@ def video_generate_view(request):
             duration=duration,
             seconds_consumed=duration,
             frozen_amount=estimated_cost,
-            resolution='720p',
+            resolution=resolution,
             tokens_consumed=0,
             cost_amount=0,
             base_cost_amount=0,
@@ -471,6 +510,7 @@ def video_generate_view(request):
                 duration=duration,
                 search_mode=search_mode,
                 seed=seed,
+                resolution=resolution,
             )
             ark_task_id = ark_response.get('id', '')
             record.ark_task_id = ark_task_id
@@ -550,7 +590,9 @@ def _settle_payment(record, total_tokens):
         return
     config = QuotaConfig.objects.get_or_create(pk=1)[0]
     has_video_ref = _has_video_reference(record.reference_urls)
-    token_price = _get_token_price(config, record.model, has_video_ref)
+    # 按任务实际 resolution 取单价（1080P 任务用 1080P 单价结算）
+    # record.resolution 有 model 层 default='720p' + choices 约束 + data migration 回填，永远不为空
+    token_price = _get_token_price(config, record.model, has_video_ref, record.resolution)
     actual_cost = calculate_cost(total_tokens, token_price, team.markup_percentage)
     base_cost = calculate_base_cost(total_tokens, token_price)
     frozen = record.frozen_amount
@@ -634,6 +676,7 @@ def _serialize_task(record):
         'mode': record.mode,
         'model': record.model,
         'aspect_ratio': record.aspect_ratio,
+        'resolution': record.resolution,
         'duration': record.duration,
         'seconds_consumed': record.seconds_consumed,
         'tokens_consumed': record.tokens_consumed,
@@ -1705,6 +1748,7 @@ def admin_records_view(request):
             'mode': r.mode,
             'model': r.model,
             'aspect_ratio': r.aspect_ratio,
+            'resolution': r.resolution,
             'status': r.status,
             'error_message': r.error_message or '',
             'raw_error': r.raw_error or '',
@@ -1768,6 +1812,7 @@ def team_records_view(request):
             'mode': r.mode,
             'model': r.model,
             'aspect_ratio': r.aspect_ratio,
+            'resolution': r.resolution,
             'status': r.status,
             'error_message': r.error_message or '',
             'raw_error': r.raw_error or '',
@@ -2656,6 +2701,7 @@ def profile_records_view(request):
             'mode': r.mode,
             'model': r.model,
             'aspect_ratio': r.aspect_ratio,
+            'resolution': r.resolution,
             'status': r.status,
             'error_message': r.error_message or '',
         })
@@ -2788,6 +2834,7 @@ def admin_assets_user_videos(request, user_id):
             'duration': r.duration,
             'seconds_consumed': r.seconds_consumed,
             'aspect_ratio': r.aspect_ratio,
+            'resolution': r.resolution,
             'reference_urls': r.reference_urls or [],
             'created_at': r.created_at.isoformat(),
         })
@@ -2869,6 +2916,7 @@ def team_assets_member_videos(request, member_id):
             'duration': r.duration,
             'seconds_consumed': r.seconds_consumed,
             'aspect_ratio': r.aspect_ratio,
+            'resolution': r.resolution,
             'reference_urls': r.reference_urls or [],
             'created_at': r.created_at.isoformat(),
         })
diff --git a/backend/tests/test_1080p_api.py b/backend/tests/test_1080p_api.py
new file mode 100644
index 0000000..72e348a
--- /dev/null
+++ b/backend/tests/test_1080p_api.py
@@ -0,0 +1,131 @@
+"""
+1080P API 集成测试 — 验证 video_generate_view 的入口校验。
+"""
+import os
+import sys
+import django
+
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+django.setup()
+
+import unittest
+from django.test import TestCase
+from django.contrib.auth import get_user_model
+from rest_framework.test import APIClient
+from apps.accounts.models import Team
+from apps.generation.models import QuotaConfig
+
+User = get_user_model()
+
+
+class TestVideoGenerateResolution(TestCase):
+    """video_generate_view 的分辨率+模型组合校验。"""
+
+    def setUp(self):
+        # 初始化 QuotaConfig
+        QuotaConfig.objects.get_or_create(pk=1)
+
+        # 建测试 team + user
+        self.team = Team.objects.create(
+            name='test-1080p',
+            is_active=True,
+            monthly_spending_limit=1000,
+            markup_percentage=0,
+            balance=1000,
+            frozen_amount=0,
+        )
+        self.user = User.objects.create_user(
+            username='test_1080p_user',
+            email='test1080p@example.com',
+            password='testpass123',
+            team=self.team,
+            spending_limit=-1,
+            daily_generation_limit=-1,
+            monthly_generation_limit=-1,
+        )
+        self.client = APIClient()
+        self.client.force_authenticate(user=self.user)
+
+    def test_reject_fast_plus_1080p(self):
+        """原则 1：Fast + 1080P 组合必须 400 拒绝，不能静默降级。"""
+        resp = self.client.post('/api/v1/video/generate', {
+            'prompt': '测试',
+            'mode': 'universal',
+            'model': 'seedance_2.0_fast',
+            'aspect_ratio': '16:9',
+            'duration': 5,
+            'resolution': '1080p',
+            'references': [],
+        }, format='json')
+        self.assertEqual(resp.status_code, 400)
+        body = resp.json()
+        self.assertEqual(body.get('error'), 'invalid_resolution')
+        # 提示信息要明确告知用户原因
+        self.assertIn('1080P', body.get('message', ''))
+        self.assertIn('Fast', body.get('message', ''))
+
+    def test_reject_adaptive_ratio(self):
+        """原则 1：adaptive 不在 6 选 1 白名单，拒绝。"""
+        resp = self.client.post('/api/v1/video/generate', {
+            'prompt': '测试',
+            'mode': 'universal',
+            'model': 'seedance_2.0',
+            'aspect_ratio': 'adaptive',
+            'duration': 5,
+            'resolution': '720p',
+            'references': [],
+        }, format='json')
+        self.assertEqual(resp.status_code, 400)
+        # serializer 错误：aspect_ratio 不在 choices
+        self.assertIn('aspect_ratio', str(resp.content))
+
+    def test_reject_invalid_resolution(self):
+        """resolution 不在 480p/720p/1080p 白名单，拒绝。"""
+        resp = self.client.post('/api/v1/video/generate', {
+            'prompt': '测试',
+            'mode': 'universal',
+            'model': 'seedance_2.0',
+            'aspect_ratio': '16:9',
+            'duration': 5,
+            'resolution': '4K',
+            'references': [],
+        }, format='json')
+        self.assertEqual(resp.status_code, 400)
+
+    def test_resolution_default_720p_when_missing(self):
+        """旧客户端不传 resolution 字段时，serializer default='720p' 生效。"""
+        # 不传 resolution（兼容旧客户端）
+        resp = self.client.post('/api/v1/video/generate', {
+            'prompt': '测试',
+            'mode': 'universal',
+            'model': 'seedance_2.0',
+            'aspect_ratio': '16:9',
+            'duration': 5,
+            'references': [],
+        }, format='json')
+        # serializer 应该接受（default='720p'）；可能因火山 API 未开通等其他原因失败，
+        # 但不该是 resolution 相关的 400 错误
+        if resp.status_code == 400:
+            body = resp.json()
+            self.assertNotEqual(body.get('error'), 'invalid_resolution')
+
+    def test_accept_valid_1080p_airdrama(self):
+        """原则：AirDrama + 1080P 组合合法，不被 400 拒绝。"""
+        resp = self.client.post('/api/v1/video/generate', {
+            'prompt': '测试',
+            'mode': 'universal',
+            'model': 'seedance_2.0',
+            'aspect_ratio': '16:9',
+            'duration': 5,
+            'resolution': '1080p',
+            'references': [],
+        }, format='json')
+        # 不应该因为分辨率被 400（可能因余额/API 未开通等其他原因失败）
+        if resp.status_code == 400:
+            body = resp.json()
+            self.assertNotEqual(body.get('error'), 'invalid_resolution')
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
diff --git a/backend/tests/test_1080p_billing.py b/backend/tests/test_1080p_billing.py
new file mode 100644
index 0000000..229e974
--- /dev/null
+++ b/backend/tests/test_1080p_billing.py
@@ -0,0 +1,208 @@
+"""
+1080P 分辨率支持的计费逻辑测试 — 严格对齐用户三原则：
+1. 不兜底/静默降级
+2. 钱的计算绝对准确（纯官方公式）
+3. 不隐藏 bug（非法组合 fail loud）
+
+运行方式：
+    cd backend && source venv/Scripts/activate && python -m pytest tests/test_1080p_billing.py -v
+或 Django test runner：
+    python manage.py test tests.test_1080p_billing
+"""
+import os
+import sys
+import django
+
+# Django setup
+os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'config.settings')
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '..')))
+django.setup()
+
+import unittest
+from utils.billing import (
+    RESOLUTION_MAP,
+    get_resolution,
+    estimate_tokens,
+    calculate_cost,
+    calculate_base_cost,
+)
+
+
+class TestResolutionMap(unittest.TestCase):
+    """验证 RESOLUTION_MAP 的 18 个组合像素值与官方文档一致。"""
+
+    def test_1080p_pixels(self):
+        # 来自 docs/API文档/创建视频生成任务API.md Seedance 2.0 & 2.0 fast 列
+        self.assertEqual(get_resolution('16:9', '1080p'), (1920, 1080))
+        self.assertEqual(get_resolution('9:16', '1080p'), (1080, 1920))
+        self.assertEqual(get_resolution('4:3', '1080p'), (1664, 1248))
+        self.assertEqual(get_resolution('1:1', '1080p'), (1440, 1440))
+        self.assertEqual(get_resolution('3:4', '1080p'), (1248, 1664))
+        # 21:9 特别注意：是 2206×946，不是 seedance 1.0 的 2176×928
+        self.assertEqual(get_resolution('21:9', '1080p'), (2206, 946))
+
+    def test_720p_pixels(self):
+        self.assertEqual(get_resolution('16:9', '720p'), (1280, 720))
+        self.assertEqual(get_resolution('21:9', '720p'), (1470, 630))
+
+    def test_480p_pixels(self):
+        self.assertEqual(get_resolution('16:9', '480p'), (864, 496))
+        self.assertEqual(get_resolution('21:9', '480p'), (992, 432))
+
+    def test_invalid_combo_raises(self):
+        """原则 1：非法组合必须 fail loud，不静默降级。"""
+        with self.assertRaises(KeyError):
+            get_resolution('adaptive', '720p')  # adaptive 不在 map
+        with self.assertRaises(KeyError):
+            get_resolution('16:9', '4K')  # 不存在的 tier
+        with self.assertRaises(KeyError):
+            get_resolution('unknown', 'unknown')
+
+    def test_tier_required(self):
+        """tier 参数必填，不允许默认 720p 静默降级。"""
+        with self.assertRaises(TypeError):
+            get_resolution('16:9')  # type: ignore - 故意漏参数
+
+
+class TestEstimateTokens(unittest.TestCase):
+    """
+    严格对齐官方公式：`(输入视频时长+输出时长) × 宽 × 高 × 帧率 / 1024`
+    预估端不做最低 token 修正（那是火山计费侧逻辑）。
+    """
+
+    def test_formula_no_input_video(self):
+        # 720P 16:9 (1280×720), 5s 输出, 24fps
+        # 1280 × 720 × 24 × 5 / 1024 = 108000
+        self.assertEqual(estimate_tokens(1280, 720, 5), 108000)
+
+    def test_formula_with_input_video(self):
+        # 720P 16:9, 5s 输出 + 5s 输入 = 10s 总时长
+        # 1280 × 720 × 24 × 10 / 1024 = 216000
+        self.assertEqual(estimate_tokens(1280, 720, 5, input_video_duration=5), 216000)
+
+    def test_1080p_formula(self):
+        # 1080P 16:9 (1920×1080), 5s 输出, 无输入视频
+        # 1920 × 1080 × 24 × 5 / 1024 = 243000
+        self.assertEqual(estimate_tokens(1920, 1080, 5), 243000)
+
+    def test_1080p_with_input_video(self):
+        # 1080P 16:9, 5s 输出 + 2s 输入 = 7s
+        # 1920 × 1080 × 24 × 7 / 1024 = 340200
+        self.assertEqual(estimate_tokens(1920, 1080, 5, input_video_duration=2), 340200)
+
+    def test_no_silent_min_token_adjustment(self):
+        """原则 2：预估端严格按公式，不做最低 token 修正。
+        火山文档说 1080p 5s 输入含视频最低 437400 tokens，但那是火山计费侧的事，
+        我们预估就老老实实按公式算 (5s+2s)×1920×1080×24/1024 = 340200，不擅自拉高。
+        """
+        # 1080p 5s 输出 + 2s 输入 = 7s 总时长
+        # 公式值 340200，官方最低 437400
+        # 我们应该返回公式值，不主动调到最低值
+        result = estimate_tokens(1920, 1080, 5, input_video_duration=2)
+        self.assertEqual(result, 340200, "预估端不应主动修正到火山最低 token")
+
+    def test_float_input_duration(self):
+        """输入视频时长可能是浮点数（前端 getMediaInfo 读取），要正确累加。"""
+        # 720P 16:9, 5s 输出 + 3.5s 输入 = 8.5s
+        # 1280 × 720 × 24 × 8.5 / 1024 = 183600
+        self.assertEqual(estimate_tokens(1280, 720, 5, input_video_duration=3.5), 183600)
+
+
+class TestGetTokenPrice(unittest.TestCase):
+    """验证单价选择逻辑 — 4 种模型×视频组合 + 1080p 独立单价 + Fast+1080P fail loud。"""
+
+    def setUp(self):
+        # Mock QuotaConfig — 用官方文档默认值
+        from types import SimpleNamespace
+        from decimal import Decimal
+        self.config = SimpleNamespace(
+            base_token_price=Decimal('46'),
+            base_token_price_video=Decimal('28'),
+            base_token_price_fast=Decimal('37'),
+            base_token_price_fast_video=Decimal('22'),
+            base_token_price_1080p=Decimal('51'),
+            base_token_price_1080p_video=Decimal('31'),
+        )
+        from apps.generation.views import _get_token_price
+        self._get_token_price = _get_token_price
+
+    def test_seedance_2_0_720p_no_video(self):
+        """AirDrama 720P 不含视频 = 46 元/百万 tokens."""
+        price = self._get_token_price(self.config, 'seedance_2.0', False, '720p')
+        self.assertEqual(price, 46)
+
+    def test_seedance_2_0_720p_with_video(self):
+        """AirDrama 720P 含视频 = 28."""
+        price = self._get_token_price(self.config, 'seedance_2.0', True, '720p')
+        self.assertEqual(price, 28)
+
+    def test_seedance_2_0_480p_same_as_720p(self):
+        """480p 和 720p 共享同一单价（官方价格一致）。"""
+        price_480 = self._get_token_price(self.config, 'seedance_2.0', False, '480p')
+        price_720 = self._get_token_price(self.config, 'seedance_2.0', False, '720p')
+        self.assertEqual(price_480, price_720)
+
+    def test_seedance_2_0_1080p_no_video(self):
+        """AirDrama 1080P 不含视频 = 51（独立单价，不是 720p 的 46）."""
+        price = self._get_token_price(self.config, 'seedance_2.0', False, '1080p')
+        self.assertEqual(price, 51)
+
+    def test_seedance_2_0_1080p_with_video(self):
+        """AirDrama 1080P 含视频 = 31（独立单价，不是 720p 的 28）."""
+        price = self._get_token_price(self.config, 'seedance_2.0', True, '1080p')
+        self.assertEqual(price, 31)
+
+    def test_fast_720p_no_video(self):
+        """Fast 720P 不含视频 = 37."""
+        price = self._get_token_price(self.config, 'seedance_2.0_fast', False, '720p')
+        self.assertEqual(price, 37)
+
+    def test_fast_720p_with_video(self):
+        """Fast 720P 含视频 = 22."""
+        price = self._get_token_price(self.config, 'seedance_2.0_fast', True, '720p')
+        self.assertEqual(price, 22)
+
+    def test_fast_480p_uses_fast_price(self):
+        """Fast 不分 480p/720p，都用 fast 单价。"""
+        price_480 = self._get_token_price(self.config, 'seedance_2.0_fast', False, '480p')
+        price_720 = self._get_token_price(self.config, 'seedance_2.0_fast', False, '720p')
+        self.assertEqual(price_480, price_720)
+        self.assertEqual(price_480, 37)
+
+    def test_fast_1080p_raises_value_error(self):
+        """原则 1 + 3：Fast + 1080P 必须 fail loud，不能静默按 720p 价（欺骗用户）。"""
+        with self.assertRaises(ValueError) as ctx:
+            self._get_token_price(self.config, 'seedance_2.0_fast', False, '1080p')
+        self.assertIn('1080p', str(ctx.exception).lower())
+
+        with self.assertRaises(ValueError):
+            self._get_token_price(self.config, 'seedance_2.0_fast', True, '1080p')
+
+
+class TestCalculateCost(unittest.TestCase):
+    """验证扣费金额计算 = tokens × 单价 × (1 + 加价%)，精确到分."""
+
+    def test_720p_cost_matches_official_example(self):
+        """官方示例：720P 5s 16:9 = 4.97 元（无加价）."""
+        # 720p 5s 公式值 108000 tokens
+        tokens = estimate_tokens(1280, 720, 5)
+        # 46 元/百万 × 108000 / 1000000 = 4.968 ≈ 4.97
+        cost = calculate_cost(tokens, 46, 0)
+        self.assertEqual(str(cost), '4.97')
+
+    def test_1080p_no_video_cost(self):
+        """1080P 5s 16:9 不含视频 = 1920×1080×24×5/1024 × 51 / 1000000 = 12.393 ≈ 12.39 元."""
+        tokens = estimate_tokens(1920, 1080, 5)
+        cost = calculate_cost(tokens, 51, 0)
+        self.assertEqual(str(cost), '12.39')
+
+    def test_markup_applied(self):
+        """团队加价 20% 的情况。"""
+        tokens = estimate_tokens(1280, 720, 5)  # 108000
+        cost = calculate_cost(tokens, 46, 20)
+        # 4.968 × 1.2 = 5.9616 → 5.96
+        self.assertEqual(str(cost), '5.96')
+
+
+if __name__ == '__main__':
+    unittest.main(verbosity=2)
diff --git a/backend/utils/airdrama_client.py b/backend/utils/airdrama_client.py
index a3b548d..eb800fb 100644
--- a/backend/utils/airdrama_client.py
+++ b/backend/utils/airdrama_client.py
@@ -92,7 +92,7 @@ def _headers():
     }
 
 
-def create_task(prompt, model, content_items, aspect_ratio, duration,
+def create_task(prompt, model, content_items, aspect_ratio, duration, resolution,
                 generate_audio=True, search_mode='off', seed=-1):
     """Create a video generation task.
 
@@ -102,6 +102,9 @@ def create_task(prompt, model, content_items, aspect_ratio, duration,
         content_items: List of media content dicts (image_url, video_url, audio_url).
         aspect_ratio: Video aspect ratio ('16:9', '9:16', etc.).
         duration: Video duration in seconds.
+        resolution: Output video resolution ('480p'|'720p'|'1080p'). 必填，不设默认值避免调用者遗漏导致
+            静默降级（1080p 任务若因默认值被意外降为 720p 会产生计费偏差，违反准确性原则）。
+            注意：1080p 仅 Seedance 2.0 支持。
         generate_audio: Whether to generate audio with the video.
         search_mode: 'smart' to enable internet search, 'off' to disable.
 
@@ -120,6 +123,7 @@ def create_task(prompt, model, content_items, aspect_ratio, duration,
         'content': content,
         'generate_audio': generate_audio,
         'ratio': aspect_ratio,
+        'resolution': resolution,
         'duration': duration,
         'watermark': False,
         'seed': seed,
diff --git a/backend/utils/billing.py b/backend/utils/billing.py
index ee34db2..c4d650e 100644
--- a/backend/utils/billing.py
+++ b/backend/utils/billing.py
@@ -22,20 +22,62 @@ RESOLUTION_MAP = {
     ('480p', '1:1'): (640, 640),
     ('480p', '3:4'): (560, 752),
     ('480p', '21:9'): (992, 432),
+    # 1080p (来自火山 API 文档，Seedance 2.0 & 2.0 fast 列)
+    ('1080p', '16:9'): (1920, 1080),
+    ('1080p', '9:16'): (1080, 1920),
+    ('1080p', '4:3'): (1664, 1248),
+    ('1080p', '1:1'): (1440, 1440),
+    ('1080p', '3:4'): (1248, 1664),
+    ('1080p', '21:9'): (2206, 946),
 }
 
 # 默认帧率
 DEFAULT_FPS = 24
 
 
-def get_resolution(aspect_ratio: str, tier: str = '720p') -> tuple:
-    """根据宽高比和分辨率档位返回 (width, height) 像素值。"""
-    return RESOLUTION_MAP.get((tier, aspect_ratio), (1280, 720))
+def get_resolution(aspect_ratio: str, tier: str) -> tuple:
+    """根据宽高比和分辨率档位返回 (width, height) 像素值。
+
+    tier 必填，不设默认值 — 避免调用者遗漏时静默降级为 720p（违反计费准确性原则）。
+    若 (tier, aspect_ratio) 组合不在 RESOLUTION_MAP（如 adaptive），raise KeyError，
+    让上游感知并 fail loud。上游（serializer/前端）负责保证合法组合。
+    """
+    key = (tier, aspect_ratio)
+    if key not in RESOLUTION_MAP:
+        raise KeyError(
+            f'不支持的分辨率组合: tier={tier!r}, aspect_ratio={aspect_ratio!r}. '
+            f'仅支持 480p/720p/1080p × 16:9/9:16/4:3/1:1/3:4/21:9'
+        )
+    return RESOLUTION_MAP[key]
 
 
-def estimate_tokens(width: int, height: int, duration: int, fps: int = DEFAULT_FPS) -> int:
-    """预估视频生成消耗的 tokens。"""
-    return round(width * height * fps * duration / 1024)
+def estimate_tokens(
+    width: int,
+    height: int,
+    duration: int,
+    fps: int = DEFAULT_FPS,
+    input_video_duration: float = 0,
+) -> int:
+    """预估视频生成消耗的 tokens。
+
+    火山官方公式：`(输入视频时长 + 输出视频时长) × 宽 × 高 × 帧率 / 1024`
+
+    ⚠️ 这是预估值，仅用于前端展示和额度冻结。
+    真实费用以火山 API 返回的 usage.total_tokens 为准（`_settle_payment` 中按实际值结算）。
+    最低 token 用量限制是火山计费端的逻辑，我方不在预估端维护该表（避免与官方脱钩）。
+
+    Args:
+        width: 输出视频宽度（像素）
+        height: 输出视频高度（像素）
+        duration: 输出视频时长（秒）
+        fps: 帧率，默认 24
+        input_video_duration: 输入参考视频的总时长（秒），默认 0
+
+    Returns:
+        token 估算值（整数）
+    """
+    total_duration = duration + (input_video_duration or 0)
+    return round(width * height * fps * total_duration / 1024)
 
 
 def calculate_cost(tokens: int, base_price, markup_percentage) -> Decimal:
diff --git a/web/src/components/Dropdown.tsx b/web/src/components/Dropdown.tsx
index 9cd116c..4c0a2b5 100644
--- a/web/src/components/Dropdown.tsx
+++ b/web/src/components/Dropdown.tsx
@@ -5,6 +5,7 @@ interface DropdownItem {
   label: string;
   value: string;
   icon?: ReactNode;
+  disabled?: boolean;
 }
 
 interface DropdownProps {
@@ -41,8 +42,10 @@ export function Dropdown({ items, value, onSelect, trigger, minWidth = 150 }: Dr
         {items.map((item) => (
           <div
             key={item.value}
-            className={`${styles.item} ${value === item.value ? styles.selected : ''}`}
+            className={`${styles.item} ${value === item.value ? styles.selected : ''} ${item.disabled ? styles.disabled : ''}`}
+            style={item.disabled ? { opacity: 0.4, cursor: 'not-allowed' } : undefined}
             onClick={() => {
+              if (item.disabled) return;
               onSelect(item.value);
               setOpen(false);
             }}
diff --git a/web/src/components/GenerationCard.tsx b/web/src/components/GenerationCard.tsx
index 3ba65d9..5136943 100644
--- a/web/src/components/GenerationCard.tsx
+++ b/web/src/components/GenerationCard.tsx
@@ -389,7 +389,7 @@ export function GenerationCard({ task, onOpenDetail }: Props) {
                 <span>时长</span><span>{task.duration}s</span>
               </div>
               <div className={styles.detailRow}>
-                <span>分辨率</span><span>720p</span>
+                <span>分辨率</span><span>{task.resolution.toUpperCase()}</span>
               </div>
               <div className={styles.detailRow}>
                 <span>模型</span>
diff --git a/web/src/components/Toolbar.tsx b/web/src/components/Toolbar.tsx
index 2f431a5..4af9680 100644
--- a/web/src/components/Toolbar.tsx
+++ b/web/src/components/Toolbar.tsx
@@ -4,7 +4,8 @@ import { useGenerationStore } from '../store/generation';
 import { useAuthStore } from '../store/auth';
 import { Dropdown } from './Dropdown';
 import { showToast } from './Toast';
-import type { CreationMode, AspectRatio, Duration, GenerationType, ModelOption } from '../types';
+import { parseAssetMentions } from '../lib/assetMentions';
+import type { CreationMode, AspectRatio, Duration, Resolution, GenerationType, ModelOption } from '../types';
 import styles from './Toolbar.module.css';
 
 const VideoIcon = () => (
@@ -71,10 +72,7 @@ const generationTypeItems = [
   { label: '视频生成', value: 'video' as GenerationType, icon: <VideoIcon /> },
 ];
 
-const modelItems = [
-  { label: 'AirDrama', value: 'seedance_2.0' as ModelOption, icon: <DiamondIcon /> },
-  { label: 'AirDrama Fast', value: 'seedance_2.0_fast' as ModelOption, icon: <LightningIcon /> },
-];
+// NOTE: modelItems 在组件内部按 resolution 动态构建（1080P 下 Fast 置灰）
 
 const modeItems = [
   { label: '全能参考', value: 'universal' as CreationMode, icon: <StarIcon /> },
@@ -99,9 +97,20 @@ const durationItems = Array.from({ length: 12 }, (_, i) => {
   return { label: `${v}s`, value: String(v) };
 });
 
-const RESOLUTION_MAP: Record<string, [number, number]> = {
-  '16:9': [1280, 720], '9:16': [720, 1280], '4:3': [1112, 834],
-  '1:1': [960, 960], '3:4': [834, 1112], '21:9': [1470, 630],
+// 对照 billing.py::RESOLUTION_MAP — 前端预估与后端计费保持一致
+const RESOLUTION_PIXELS: Record<Resolution, Record<string, [number, number]>> = {
+  '480p': {
+    '16:9': [864, 496], '9:16': [496, 864], '4:3': [752, 560],
+    '1:1': [640, 640], '3:4': [560, 752], '21:9': [992, 432],
+  },
+  '720p': {
+    '16:9': [1280, 720], '9:16': [720, 1280], '4:3': [1112, 834],
+    '1:1': [960, 960], '3:4': [834, 1112], '21:9': [1470, 630],
+  },
+  '1080p': {
+    '16:9': [1920, 1080], '9:16': [1080, 1920], '4:3': [1664, 1248],
+    '1:1': [1440, 1440], '3:4': [1248, 1664], '21:9': [2206, 946],
+  },
 };
 
 const modeLabels: Record<CreationMode, string> = {
@@ -120,30 +129,67 @@ export function Toolbar() {
   const setAspectRatio = useInputBarStore((s) => s.setAspectRatio);
   const duration = useInputBarStore((s) => s.duration);
   const setDuration = useInputBarStore((s) => s.setDuration);
+  const resolution = useInputBarStore((s) => s.resolution);
+  const setResolution = useInputBarStore((s) => s.setResolution);
   const isSubmittable = useInputBarStore((s) => s.canSubmit());
   const triggerInsertAt = useInputBarStore((s) => s.triggerInsertAt);
 
   const isKeyframe = mode === 'keyframe';
   const references = useInputBarStore((s) => s.references);
+  const editorHtml = useInputBarStore((s) => s.editorHtml);
   const team = useAuthStore((s) => s.team);
 
   const addTask = useGenerationStore((s) => s.addTask);
 
   const estimatedTokens = useMemo(() => {
-    const res = RESOLUTION_MAP[aspectRatio] || [1280, 720];
-    return Math.round((res[0] * res[1] * 24 * duration) / 1024);
-  }, [aspectRatio, duration]);
+    // 官方公式：`(输入视频时长 + 输出视频时长) × 宽 × 高 × 24fps / 1024`
+    // 前后端必须一致（和 backend/utils/billing.py::estimate_tokens 对齐）。
+    // 输入视频时长 = 直接上传的视频 references.duration + 素材库 @ 视频的 duration
+    // resolution / aspectRatio 都是严格类型枚举，不做 || 兜底 — bug 直接暴露。
+    const [w, h] = RESOLUTION_PIXELS[resolution][aspectRatio];
+    const refVideoDur = references
+      .filter((r) => r.type === 'video' && typeof r.duration === 'number')
+      .reduce((sum, r) => sum + (r.duration || 0), 0);
+    const mentionVideoDur = parseAssetMentions(editorHtml).durations.video;
+    const totalDuration = duration + refVideoDur + mentionVideoDur;
+    return Math.round((w * h * 24 * totalDuration) / 1024);
+  }, [aspectRatio, duration, resolution, references, editorHtml]);
+
+  // 分辨率 Dropdown：Fast 模式下 1080P 置灰
+  const resolutionItems = useMemo(() => [
+    { label: '480P', value: '480p' as Resolution },
+    { label: '720P', value: '720p' as Resolution },
+    {
+      label: model === 'seedance_2.0_fast' ? '1080P（Fast 不支持）' : '1080P',
+      value: '1080p' as Resolution,
+      disabled: model === 'seedance_2.0_fast',
+    },
+  ], [model]);
+
+  // 模型 Dropdown：当前 1080P 时，Fast 置灰（1080P 仅 AirDrama 支持）
+  const modelItems = useMemo(() => [
+    { label: 'AirDrama', value: 'seedance_2.0', icon: <DiamondIcon /> },
+    {
+      label: resolution === '1080p' ? 'AirDrama Fast（不支持 1080P）' : 'AirDrama Fast',
+      value: 'seedance_2.0_fast',
+      icon: <LightningIcon />,
+      disabled: resolution === '1080p',
+    },
+  ], [resolution]);
 
   const estimatedCost = useMemo(() => {
     const hasVideoRef = references.some((r) => r.type === 'video');
     let price = team?.token_price || 0;
     if (model === 'seedance_2.0_fast') {
+      // Fast 不支持 1080p，单价不分分辨率
       price = hasVideoRef ? (team?.token_price_fast_video || 0) : (team?.token_price_fast || 0);
+    } else if (resolution === '1080p') {
+      price = hasVideoRef ? (team?.token_price_1080p_video || 0) : (team?.token_price_1080p || 0);
     } else {
       price = hasVideoRef ? (team?.token_price_video || 0) : (team?.token_price || 0);
     }
     return (estimatedTokens * price / 1000000).toFixed(2);
-  }, [estimatedTokens, model, references, team]);
+  }, [estimatedTokens, model, resolution, references, team]);
 
   const handleSend = useCallback(() => {
     if (!isSubmittable) {
@@ -224,6 +270,19 @@ export function Toolbar() {
         }
       />
 
+      {/* Resolution */}
+      <Dropdown
+        items={resolutionItems}
+        value={resolution}
+        onSelect={(v) => setResolution(v as Resolution)}
+        minWidth={100}
+        trigger={
+          <button className={styles.btn}>
+            <span className={styles.label}>{resolution.toUpperCase()}</span>
+          </button>
+        }
+      />
+
       {/* Duration */}
       <Dropdown
         items={durationItems}
@@ -264,7 +323,7 @@ export function Toolbar() {
       {isSubmittable && (team?.token_price || 0) > 0 && (
         <span
           style={{ fontSize: 12, color: '#8b8ea8', whiteSpace: 'nowrap', userSelect: 'none', marginRight: 16, lineHeight: 1 }}
-          title={`预估公式: (宽 x 高 x 24fps x 时长) / 1024 = tokens, tokens x 单价 / 1000000 = 费用`}
+          title={`预估公式: (宽 × 高 × 24fps × 时长) / 1024 = tokens, tokens × 单价 / 1000000 = 费用\n⚠️ 仅为预估值，实际费用以火山 API 返回的 token 数为准`}
         >
           预估消耗：{estimatedTokens.toLocaleString()} tokens / ¥{estimatedCost}
         </span>
diff --git a/web/src/components/VideoDetailModal.tsx b/web/src/components/VideoDetailModal.tsx
index 9780a50..f4e1b22 100644
--- a/web/src/components/VideoDetailModal.tsx
+++ b/web/src/components/VideoDetailModal.tsx
@@ -220,6 +220,7 @@ export function VideoDetailModal({ task, onClose, onReEdit, onRegenerate, onDele
       if (task.model) store.setModel(task.model as 'seedance_2.0' | 'seedance_2.0_fast');
       if (task.aspectRatio) store.setAspectRatio(task.aspectRatio as any);
       if (task.duration) store.setDuration(task.duration);
+      if (task.resolution) store.setResolution(task.resolution);
       // Load references from task (exclude asset library refs — they restore via @mentions in editorHtml)
       if (task.references && task.references.length > 0) {
         const refs = task.references.filter(r => r.previewUrl && !r.isAssetRef).map(r => ({
diff --git a/web/src/lib/api.ts b/web/src/lib/api.ts
index d9d52b7..60e0916 100644
--- a/web/src/lib/api.ts
+++ b/web/src/lib/api.ts
@@ -146,6 +146,7 @@ export const videoApi = {
     model: string;
     aspect_ratio: string;
     duration: number;
+    resolution: string;
     references: { url: string; type: string; role: string; label: string; thumb_url?: string; duration?: string }[];
     search_mode?: string;
     seed?: number;
diff --git a/web/src/pages/AdminAssetsPage.tsx b/web/src/pages/AdminAssetsPage.tsx
index 0e2a45d..41c7ff6 100644
--- a/web/src/pages/AdminAssetsPage.tsx
+++ b/web/src/pages/AdminAssetsPage.tsx
@@ -57,6 +57,7 @@ function assetVideoToTask(v: AssetVideo): GenerationTask {
     model: 'seedance_2.0',
     aspectRatio: (v.aspect_ratio as any) || '16:9',
     duration: v.duration as any,
+    resolution: v.resolution,
     references,
     assetMentions: [],
     status: 'completed',
diff --git a/web/src/pages/SettingsPage.tsx b/web/src/pages/SettingsPage.tsx
index a3c13da..18eb9c8 100644
--- a/web/src/pages/SettingsPage.tsx
+++ b/web/src/pages/SettingsPage.tsx
@@ -14,6 +14,8 @@ export function SettingsPage() {
     base_token_price_video: 0,
     base_token_price_fast: 0,
     base_token_price_fast_video: 0,
+    base_token_price_1080p: 0,
+    base_token_price_1080p_video: 0,
     announcement: '',
     announcement_enabled: false,
     max_desktop_sessions: 1,
@@ -143,7 +145,7 @@ export function SettingsPage() {
             />
           </div>
         </div>
-        <p className={styles.cardDesc}>Seedance 2.0</p>
+        <p className={styles.cardDesc}>Seedance 2.0（480P / 720P）</p>
         <div className={styles.formRow}>
           <div className={styles.formGroup}>
             <label>不含视频输入单价 (元/百万tokens)</label>
@@ -164,7 +166,28 @@ export function SettingsPage() {
             />
           </div>
         </div>
-        <p className={styles.cardDesc}>Seedance 2.0 Fast</p>
+        <p className={styles.cardDesc}>Seedance 2.0（1080P）</p>
+        <div className={styles.formRow}>
+          <div className={styles.formGroup}>
+            <label>不含视频输入单价 (元/百万tokens)</label>
+            <input
+              type="number"
+              step="0.01"
+              value={settings.base_token_price_1080p}
+              onChange={(e) => setSettings({ ...settings, base_token_price_1080p: Number(e.target.value) })}
+            />
+          </div>
+          <div className={styles.formGroup}>
+            <label>含视频输入单价 (元/百万tokens)</label>
+            <input
+              type="number"
+              step="0.01"
+              value={settings.base_token_price_1080p_video}
+              onChange={(e) => setSettings({ ...settings, base_token_price_1080p_video: Number(e.target.value) })}
+            />
+          </div>
+        </div>
+        <p className={styles.cardDesc}>Seedance 2.0 Fast（不支持 1080P）</p>
         <div className={styles.formRow}>
           <div className={styles.formGroup}>
             <label>不含视频输入单价 (元/百万tokens)</label>
diff --git a/web/src/pages/TeamAssetsPage.tsx b/web/src/pages/TeamAssetsPage.tsx
index 9c37006..54e1e0e 100644
--- a/web/src/pages/TeamAssetsPage.tsx
+++ b/web/src/pages/TeamAssetsPage.tsx
@@ -57,6 +57,7 @@ function assetVideoToTask(v: AssetVideo): GenerationTask {
     model: 'seedance_2.0',
     aspectRatio: (v.aspect_ratio as any) || '16:9',
     duration: v.duration as any,
+    resolution: v.resolution,
     references,
     assetMentions: [],
     status: 'completed',
diff --git a/web/src/store/generation.ts b/web/src/store/generation.ts
index 4c6d4b4..5a62325 100644
--- a/web/src/store/generation.ts
+++ b/web/src/store/generation.ts
@@ -32,7 +32,7 @@ function mapErrorMessage(raw?: string): string | undefined {
 
   // Model / generation errors
   if (s.includes('quota') || s.includes('insufficient'))
-    return '额度不足，请联系管理员';
+    return '今日生成次数或团队余额不足，请联系管理员';
 
   // If already Chinese, return as-is
   if (/[\u4e00-\u9fa5]/.test(raw)) return raw;
@@ -121,6 +121,7 @@ function backendToFrontend(bt: BackendTask): GenerationTask {
     model: bt.model,
     aspectRatio: bt.aspect_ratio as GenerationTask['aspectRatio'],
     duration: bt.duration as GenerationTask['duration'],
+    resolution: bt.resolution,
     references,
     assetMentions,
     status: mapStatus(bt.status),
@@ -402,6 +403,7 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
       model: input.model,
       aspectRatio: input.aspectRatio,
       duration: input.duration,
+      resolution: input.resolution,
       references: localRefs,
       assetMentions: placeholderAssetMentions,
       status: 'generating',
@@ -521,6 +523,7 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
         model: input.model,
         aspect_ratio: input.aspectRatio,
         duration: input.duration,
+        resolution: input.resolution,
         references: uploadedRefs,
         search_mode: input.searchMode || 'off',
         seed: input.seed ?? -1,
@@ -638,6 +641,7 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
         editorHtml: task.prompt,
         aspectRatio: task.aspectRatio,
         duration: task.duration,
+        resolution: task.resolution,
         references,
         assetMentions: task.assetMentions || [],
         // 如果 seed 开关打开且 task 有有效 seed，填入；否则不动
@@ -652,6 +656,7 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
         editorHtml: task.editorHtml || task.prompt,
         aspectRatio: task.aspectRatio,
         duration: task.duration,
+        resolution: task.resolution,
         assetMentions: [],
         firstFrame: firstRef ? { id: firstRef.id, type: firstRef.type, previewUrl: firstRef.previewUrl, label: '首帧', tosUrl: firstRef.previewUrl } : null,
         lastFrame: lastRef ? { id: lastRef.id, type: lastRef.type, previewUrl: lastRef.previewUrl, label: '尾帧', tosUrl: lastRef.previewUrl } : null,
@@ -688,6 +693,7 @@ export const useGenerationStore = create<GenerationState>((set, get) => ({
       model: task.model,
       aspectRatio: task.aspectRatio,
       duration: task.duration,
+      resolution: task.resolution,
       references: task.mode === 'universal' ? references : [],
       assetMentions: task.assetMentions || [],
     });
diff --git a/web/src/store/inputBar.ts b/web/src/store/inputBar.ts
index 7eb18ce..9dcfd23 100644
--- a/web/src/store/inputBar.ts
+++ b/web/src/store/inputBar.ts
@@ -1,5 +1,5 @@
 import { create } from 'zustand';
-import type { CreationMode, ModelOption, AspectRatio, Duration, GenerationType, UploadedFile } from '../types';
+import type { CreationMode, ModelOption, AspectRatio, Duration, Resolution, GenerationType, UploadedFile } from '../types';
 import { showToast } from '../components/Toast';
 import { mediaApi } from '../lib/api';
 import { parseAssetMentions } from '../lib/assetMentions';
@@ -88,6 +88,10 @@ interface InputBarState {
   setDuration: (duration: Duration) => void;
   prevDuration: Duration;
 
+  // Resolution (480p/720p/1080p) — 1080p 仅 Seedance 2.0 支持
+  resolution: Resolution;
+  setResolution: (resolution: Resolution) => void;
+
   // Prompt
   prompt: string;
   setPrompt: (prompt: string) => void;
@@ -145,7 +149,17 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
   setMode: (mode) => set({ mode }),
 
   model: 'seedance_2.0',
-  setModel: (model) => set({ model }),
+  setModel: (model) => {
+    // Fast + 1080P 为非法组合（官方文档约束）。UI Dropdown 已对 Fast 项置灰，
+    // 此处为 UI 被绕过时的防御性拦截（depth defense），不做静默降级：
+    // 阻止切换 + toast 引导用户手动改分辨率，让用户选择始终被尊重。
+    const state = get();
+    if (model === 'seedance_2.0_fast' && state.resolution === '1080p') {
+      showToast('1080P 仅 AirDrama 模型支持，请先切换分辨率到 720P 或 480P');
+      return;
+    }
+    set({ model });
+  },
 
   aspectRatio: '21:9',
   setAspectRatio: (aspectRatio) => set({ aspectRatio, prevAspectRatio: aspectRatio }),
@@ -162,6 +176,17 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
   },
   prevDuration: 15,
 
+  resolution: '720p' as Resolution,
+  setResolution: (resolution) => {
+    // Fast + 1080P 非法组合（对称 setModel 的拦截）— UI Dropdown 已置灰，此处防御性拦截
+    const state = get();
+    if (resolution === '1080p' && state.model === 'seedance_2.0_fast') {
+      showToast('AirDrama Fast 不支持 1080P，请先切换模型到 AirDrama');
+      return;
+    }
+    set({ resolution });
+  },
+
   prompt: '',
   setPrompt: (prompt) => set({ prompt }),
 
@@ -398,6 +423,7 @@ export const useInputBarStore = create<InputBarState>((set, get) => ({
       prevAspectRatio: '21:9',
       duration: 15,
       prevDuration: 15,
+      resolution: '720p',
       prompt: '',
       editorHtml: '',
       references: [],
diff --git a/web/src/types/index.ts b/web/src/types/index.ts
index 9b6e6d0..f187af8 100644
--- a/web/src/types/index.ts
+++ b/web/src/types/index.ts
@@ -2,6 +2,7 @@ export type CreationMode = 'universal' | 'keyframe';
 export type ModelOption = 'seedance_2.0' | 'seedance_2.0_fast';
 export type AspectRatio = '16:9' | '9:16' | '1:1' | '21:9' | '4:3' | '3:4';
 export type Duration = 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15;
+export type Resolution = '480p' | '720p' | '1080p';
 export type GenerationType = 'video' | 'image';
 export type UserRole = 'super_admin' | 'team_admin' | 'member';
 
@@ -44,6 +45,7 @@ export interface GenerationTask {
   model: ModelOption;
   aspectRatio: AspectRatio;
   duration: Duration;
+  resolution: Resolution;
   references: ReferenceSnapshot[];
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   assetMentions: Record<string, any>[];
@@ -67,6 +69,7 @@ export interface BackendTask {
   mode: CreationMode;
   model: ModelOption;
   aspect_ratio: string;
+  resolution: Resolution;
   duration: number;
   seconds_consumed: number;
   tokens_consumed: number;
@@ -113,6 +116,8 @@ export interface TeamInfo {
   token_price_video: number;
   token_price_fast: number;
   token_price_fast_video: number;
+  token_price_1080p: number;
+  token_price_1080p_video: number;
   is_active: boolean;
 }
 
@@ -222,6 +227,8 @@ export interface SystemSettings {
   base_token_price_video: number;
   base_token_price_fast: number;
   base_token_price_fast_video: number;
+  base_token_price_1080p: number;
+  base_token_price_1080p_video: number;
   announcement: string;
   announcement_enabled: boolean;
   max_desktop_sessions: number;
@@ -407,6 +414,7 @@ export interface AssetVideo {
   seconds_consumed: number;
   cost_amount?: number;
   aspect_ratio: string;
+  resolution: Resolution;
   reference_urls?: { url: string; type: string; role: string; label: string; thumb_url?: string }[];
   created_at: string;
 }
diff --git a/web/test/e2e/resolution-1080p.spec.ts b/web/test/e2e/resolution-1080p.spec.ts
new file mode 100644
index 0000000..978ada4
--- /dev/null
+++ b/web/test/e2e/resolution-1080p.spec.ts
@@ -0,0 +1,136 @@
+/**
+ * 1080P 分辨率支持 E2E — 真实浏览器验证 UI 双向约束和预估费用。
+ * 针对本地开发环境（localhost:5173 + 127.0.0.1:8000）。
+ */
+import { test, expect, Page } from '@playwright/test';
+
+const BASE_URL = 'http://localhost:5173';
+const API_URL = 'http://127.0.0.1:8000';
+const USERNAME = 'admin';
+const PASSWORD = 'admin123';
+
+async function login(page: Page) {
+  const resp = await page.request.post(`${API_URL}/api/v1/auth/login`, {
+    data: { username: USERNAME, password: PASSWORD },
+  });
+  if (!resp.ok()) {
+    const err = await resp.text();
+    throw new Error(`Login failed: ${resp.status()} ${err}`);
+  }
+  const body = await resp.json();
+
+  await page.goto(BASE_URL);
+  await page.evaluate(({ access, refresh }) => {
+    localStorage.setItem('access_token', access);
+    localStorage.setItem('refresh_token', refresh);
+  }, { access: body.tokens.access, refresh: body.tokens.refresh });
+  await page.goto(`${BASE_URL}/app`);
+  await page.waitForTimeout(1500);
+
+  // 关闭公告弹窗
+  const knowBtn = page.getByRole('button', { name: /我知道了|知道了|关闭/ }).first();
+  if (await knowBtn.isVisible().catch(() => false)) {
+    await knowBtn.click();
+    await page.waitForTimeout(300);
+  }
+}
+
+test.describe.serial('1080P 分辨率支持', () => {
+  test('默认分辨率显示 720P', async ({ page }) => {
+    await login(page);
+    // 找到 Toolbar 里的分辨率按钮（label 应显示 720P）
+    const resolutionBtn = page.getByRole('button', { name: '720P', exact: true }).first();
+    await expect(resolutionBtn).toBeVisible();
+  });
+
+  test('AirDrama 模式下可切换到 1080P', async ({ page }) => {
+    await login(page);
+    // 点分辨率按钮展开 dropdown
+    await page.getByRole('button', { name: '720P', exact: true }).first().click();
+    await page.waitForTimeout(200);
+
+    // 选 1080P
+    await page.getByText('1080P', { exact: true }).click();
+    await page.waitForTimeout(300);
+
+    // 分辨率按钮应显示 1080P
+    await expect(page.getByRole('button', { name: '1080P', exact: true }).first()).toBeVisible();
+  });
+
+  test('1080P 下 Fast 模型置灰（UI 不可达 Fast+1080P）', async ({ page }) => {
+    await login(page);
+    // 先切到 1080P
+    await page.getByRole('button', { name: '720P', exact: true }).first().click();
+    await page.waitForTimeout(200);
+    await page.getByText('1080P', { exact: true }).click();
+    await page.waitForTimeout(300);
+
+    // 打开模型 dropdown
+    await page.getByRole('button', { name: /AirDrama$/, exact: false }).first().click();
+    await page.waitForTimeout(200);
+
+    // Fast 项应包含 "不支持 1080P" 且有 disabled 视觉
+    const fastItem = page.getByText(/AirDrama Fast.*不支持 1080P/);
+    await expect(fastItem).toBeVisible();
+
+    // 点击 Fast 不应切换（Dropdown 的 disabled 阻止了 onSelect）
+    await fastItem.click({ force: true });
+    await page.waitForTimeout(300);
+
+    // 模型应仍是 AirDrama
+    await expect(page.getByRole('button', { name: /AirDrama$/, exact: false }).first()).toBeVisible();
+  });
+
+  test('Fast 模式下 1080P 置灰（UI 不可达 Fast+1080P，反向）', async ({ page }) => {
+    await login(page);
+    // 先确保 resolution 是 720P（reset）
+    await page.reload();
+    await page.waitForTimeout(1500);
+
+    // 切到 Fast 模型
+    await page.getByRole('button', { name: /AirDrama$/, exact: false }).first().click();
+    await page.waitForTimeout(200);
+    await page.getByText('AirDrama Fast', { exact: true }).click();
+    await page.waitForTimeout(300);
+
+    // 打开分辨率 dropdown
+    await page.getByRole('button', { name: '720P', exact: true }).first().click();
+    await page.waitForTimeout(200);
+
+    // 1080P 项应带 "Fast 不支持" 标注
+    const disabled1080p = page.getByText(/1080P.*Fast 不支持/);
+    await expect(disabled1080p).toBeVisible();
+
+    // 点击不生效
+    await disabled1080p.click({ force: true });
+    await page.waitForTimeout(300);
+
+    // 分辨率仍为 720P（可能 Dropdown 保持打开或关闭，但按钮不该变）
+    const bodyText = await page.textContent('body');
+    expect(bodyText).toContain('720P');
+  });
+
+  test('预估费用 tooltip 明示「以火山为准」', async ({ page }) => {
+    await login(page);
+    // 需要让按钮栏里的"预估"显示出来（需要有 prompt 或素材）
+    // 输入一个简单 prompt
+    const promptArea = page.locator('[contenteditable]').first();
+    if (await promptArea.isVisible().catch(() => false)) {
+      await promptArea.click();
+      await promptArea.type('测试提示词');
+      await page.waitForTimeout(300);
+    }
+
+    // 找到"预估消耗"文案
+    const estSpan = page.getByText(/预估消耗/).first();
+    if (await estSpan.isVisible().catch(() => false)) {
+      const title = await estSpan.getAttribute('title');
+      expect(title).toBeTruthy();
+      expect(title!).toContain('实际');
+      expect(title!).toContain('火山');
+    } else {
+      // 如果没有预估显示（比如 team 没配单价），跳过
+      console.log('跳过：预估未显示（team 可能未配单价）');
+    }
+  });
+});
diff --git a/web/test/unit/resolution1080p.test.ts b/web/test/unit/resolution1080p.test.ts
new file mode 100644
index 0000000..98a02a8
--- /dev/null
+++ b/web/test/unit/resolution1080p.test.ts
@@ -0,0 +1,160 @@
+/**
+ * 1080P 分辨率支持 — 前端单元测试
+ *
+ * 验证用户三原则：
+ * 1. 不兜底/静默降级 — setModel/setResolution 拦截 Fast+1080P 组合
+ * 2. 钱的计算绝对准确 — 前端 estimatedTokens 公式与后端一致
+ * 3. 不隐藏 bug — 无 || '720p' 兜底
+ */
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { useInputBarStore } from '../../src/store/inputBar';
+
+// Mock Toast 避免真实 DOM 调用
+vi.mock('../../src/components/Toast', () => ({
+  showToast: vi.fn(),
+}));
+
+describe('1080P — Store 分辨率状态', () => {
+  beforeEach(() => {
+    useInputBarStore.getState().reset();
+  });
+
+  it('默认分辨率是 720p', () => {
+    expect(useInputBarStore.getState().resolution).toBe('720p');
+  });
+
+  it('setResolution 能设为 480p / 720p / 1080p', () => {
+    const { setResolution } = useInputBarStore.getState();
+    setResolution('480p');
+    expect(useInputBarStore.getState().resolution).toBe('480p');
+    setResolution('1080p');
+    expect(useInputBarStore.getState().resolution).toBe('1080p');
+    setResolution('720p');
+    expect(useInputBarStore.getState().resolution).toBe('720p');
+  });
+
+  it('reset 把分辨率恢复为 720p', () => {
+    const { setResolution, reset } = useInputBarStore.getState();
+    setResolution('1080p');
+    reset();
+    expect(useInputBarStore.getState().resolution).toBe('720p');
+  });
+});
+
+describe('1080P — 双向拦截（原则 1：不静默降级）', () => {
+  beforeEach(() => {
+    useInputBarStore.getState().reset();
+  });
+
+  it('1080P 下切 Fast 模型应被阻止，resolution 不变，model 也不变', () => {
+    const { setResolution, setModel } = useInputBarStore.getState();
+    setResolution('1080p');
+    setModel('seedance_2.0_fast');
+    // 拦截成功：model 保持原值，resolution 不变（不降级为 720p）
+    const state = useInputBarStore.getState();
+    expect(state.model).toBe('seedance_2.0');
+    expect(state.resolution).toBe('1080p');
+  });
+
+  it('Fast 模式下切 1080P 分辨率应被阻止，model 不变，resolution 不变', () => {
+    const { setModel, setResolution } = useInputBarStore.getState();
+    setModel('seedance_2.0_fast');
+    setResolution('1080p');
+    const state = useInputBarStore.getState();
+    expect(state.model).toBe('seedance_2.0_fast');
+    expect(state.resolution).toBe('720p'); // 仍是默认 720p，没被改到 1080p
+  });
+
+  it('AirDrama 下切 1080P 正常生效', () => {
+    const { setResolution } = useInputBarStore.getState();
+    setResolution('1080p');
+    expect(useInputBarStore.getState().resolution).toBe('1080p');
+  });
+
+  it('1080P 下切回 AirDrama 正常生效（同模型不拦截）', () => {
+    const { setModel, setResolution } = useInputBarStore.getState();
+    setResolution('1080p');
+    setModel('seedance_2.0');
+    expect(useInputBarStore.getState().model).toBe('seedance_2.0');
+    expect(useInputBarStore.getState().resolution).toBe('1080p');
+  });
+
+  it('Fast 下切 480p/720p 正常生效（不是 1080p 不拦截）', () => {
+    const { setModel, setResolution } = useInputBarStore.getState();
+    setModel('seedance_2.0_fast');
+    setResolution('480p');
+    expect(useInputBarStore.getState().resolution).toBe('480p');
+    setResolution('720p');
+    expect(useInputBarStore.getState().resolution).toBe('720p');
+  });
+});
+
+describe('1080P — 官方像素值（与后端 RESOLUTION_MAP 对齐）', () => {
+  // 这里硬编码官方文档的像素表，作为前端契约测试
+  // 如果 Toolbar.tsx 的 RESOLUTION_PIXELS 改动，这些测试应该跟着更新
+  // 对应 backend/utils/billing.py::RESOLUTION_MAP
+  const EXPECTED_PIXELS = {
+    '480p': {
+      '16:9': [864, 496],
+      '9:16': [496, 864],
+      '4:3': [752, 560],
+      '1:1': [640, 640],
+      '3:4': [560, 752],
+      '21:9': [992, 432],
+    },
+    '720p': {
+      '16:9': [1280, 720],
+      '9:16': [720, 1280],
+      '4:3': [1112, 834],
+      '1:1': [960, 960],
+      '3:4': [834, 1112],
+      '21:9': [1470, 630],
+    },
+    '1080p': {
+      '16:9': [1920, 1080],
+      '9:16': [1080, 1920],
+      '4:3': [1664, 1248],
+      '1:1': [1440, 1440],
+      '3:4': [1248, 1664],
+      '21:9': [2206, 946], // 关键：不是 2176×928（seedance 1.0 值）
+    },
+  };
+
+  // estimate_tokens 官方公式实现（对齐前端 Toolbar 和后端 billing.py）
+  function estimateTokens(w: number, h: number, duration: number, inputVideoDuration = 0) {
+    return Math.round((w * h * 24 * (duration + inputVideoDuration)) / 1024);
+  }
+
+  it('1080P 5s 16:9 无输入视频 = 243000 tokens', () => {
+    const [w, h] = EXPECTED_PIXELS['1080p']['16:9'];
+    expect(estimateTokens(w, h, 5)).toBe(243000);
+  });
+
+  it('1080P 5s 16:9 含 2s 输入视频 = 340200 tokens（纯公式，不修正到最低 437400）', () => {
+    const [w, h] = EXPECTED_PIXELS['1080p']['16:9'];
+    expect(estimateTokens(w, h, 5, 2)).toBe(340200);
+  });
+
+  it('720P 5s 16:9 无输入视频 = 108000 tokens', () => {
+    const [w, h] = EXPECTED_PIXELS['720p']['16:9'];
+    expect(estimateTokens(w, h, 5)).toBe(108000);
+  });
+
+  it('1080P 21:9 像素 = 2206×946（不是 seedance 1.0 的 2176×928）', () => {
+    expect(EXPECTED_PIXELS['1080p']['21:9']).toEqual([2206, 946]);
+  });
+
+  it('价格示例：1080P 5s 16:9 × 51 元/百万 = 12.39 元', () => {
+    const tokens = 243000;
+    const price = 51;
+    const cost = (tokens * price) / 1_000_000;
+    expect(cost.toFixed(2)).toBe('12.39');
+  });
+
+  it('价格示例：720P 5s 16:9 × 46 元/百万 = 4.97 元', () => {
+    const tokens = 108000;
+    const price = 46;
+    const cost = (tokens * price) / 1_000_000;
+    expect(cost.toFixed(2)).toBe('4.97');
+  });
+});