diff --git a/.env.production.example b/.env.production.example
index f152022..e382c58 100644
--- a/.env.production.example
+++ b/.env.production.example
@@ -17,6 +17,8 @@ API_ANON_RATE=120/minute
 API_USER_RATE=600/minute
 CALCULATOR_RATE=30/minute
 SECURE_HSTS_SECONDS=31536000
+# Set true only when the HTTPS reverse proxy emits a non-zero HSTS max-age.
+DJANGO_HSTS_AT_EDGE=false
 
 # 仅供部署脚本直接访问 127.0.0.1:8000 时设置 Host 头。
 DEPLOY_HEALTH_HOST=math.example.com
diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index a8506dc..5df9a37 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -100,6 +100,7 @@ jobs:
 
           chmod +x scripts/deploy_production.sh
 
+          DJANGO_HSTS_AT_EDGE=true \
           PROJECT_DIR="$PROJECT" \
           PYTHON_BIN="$PYTHON_BIN" \
           PREVIOUS_REVISION="$PREVIOUS_REVISION" \
diff --git a/backend/common/test_deployment_security.py b/backend/common/test_deployment_security.py
new file mode 100644
index 0000000..76e159f
--- /dev/null
+++ b/backend/common/test_deployment_security.py
@@ -0,0 +1,16 @@
+from pathlib import Path
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+def test_edge_hsts_ownership_is_explicit_and_verified():
+    settings = (ROOT / "backend/config/settings.py").read_text(encoding="utf-8")
+    deploy = (ROOT / "scripts/deploy_production.sh").read_text(encoding="utf-8")
+    workflow = (ROOT / ".gitea/workflows/deploy.yml").read_text(encoding="utf-8")
+    example = (ROOT / ".env.production.example").read_text(encoding="utf-8")
+
+    assert 'os.getenv("DJANGO_HSTS_AT_EDGE", "false")' in settings
+    assert '["security.W004"]' in settings
+    assert "DJANGO_HSTS_AT_EDGE=true" in workflow
+    assert "strict-transport-security:.*max-age=[1-9][0-9]*" in deploy
+    assert "DJANGO_HSTS_AT_EDGE=false" in example
diff --git a/backend/config/settings.py b/backend/config/settings.py
index ce139b0..c3472d5 100644
--- a/backend/config/settings.py
+++ b/backend/config/settings.py
@@ -189,6 +189,12 @@ SECURE_HSTS_SECONDS = int(
 )
 SECURE_HSTS_INCLUDE_SUBDOMAINS = USE_HTTPS
 SECURE_HSTS_PRELOAD = USE_HTTPS
+HSTS_AT_EDGE = os.getenv("DJANGO_HSTS_AT_EDGE", "false").lower() == "true"
+SILENCED_SYSTEM_CHECKS = (
+    ["security.W004"]
+    if USE_HTTPS and HSTS_AT_EDGE and SECURE_HSTS_SECONDS == 0
+    else []
+)
 
 LOGGING = {
     "version": 1,
diff --git a/scripts/deploy_production.sh b/scripts/deploy_production.sh
index 6380b82..0d2f19b 100755
--- a/scripts/deploy_production.sh
+++ b/scripts/deploy_production.sh
@@ -234,6 +234,16 @@ if [ -d "$PROJECT_DIR/backend/staticfiles" ]; then
 fi
 cd "$PROJECT_DIR/backend"
 if [ "${DJANGO_USE_HTTPS:-true}" = "true" ]; then
+  if [ "${DJANGO_HSTS_AT_EDGE:-false}" = "true" ]; then
+    curl --fail --silent --show-error --head \
+      --noproxy '*' \
+      --resolve "${HEALTH_HOST}:443:127.0.0.1" \
+      --max-time 10 \
+      "https://${HEALTH_HOST}/" |
+      tr -d '\r' |
+      grep -Eiq '^strict-transport-security:.*max-age=[1-9][0-9]*'
+    log "边缘代理 HSTS 已验证"
+  fi
   "$VENV_DIR/bin/python" manage.py check --deploy --fail-level WARNING --database default
 else
   log "临时 HTTP 模式：部署安全检查只阻断 ERROR；绑定域名后应启用 HTTPS"