diff --git a/site/src/components/intake/steps/BDCDataStep.astro b/site/src/components/intake/steps/BDCDataStep.astro
index ad8f55b..ca366c1 100644
--- a/site/src/components/intake/steps/BDCDataStep.astro
+++ b/site/src/components/intake/steps/BDCDataStep.astro
@@ -46,7 +46,13 @@ const mode = service_slug === "bdc-voice" ? "voice" : service_slug === "bdc-broa
 </style>
 
 <script>
-  const mode = (document.querySelector(".pw-step[data-mode]") as HTMLElement).getAttribute("data-mode")!;
+  // Guard: only run on pages that actually have the BDC data step. Without this
+  // the top-level querySelector returns null on every other order page and the
+  // `.getAttribute` throws, killing this script (a harmless-looking but real
+  // page error). The cast `as HTMLElement` masked the null at compile time.
+  const bdcRoot = document.querySelector(".pw-step[data-mode]") as HTMLElement | null;
+  if (bdcRoot) {
+  const mode = bdcRoot.getAttribute("data-mode")!;
   const voice = document.getElementById("pw-voice-subs") as HTMLInputElement | null;
   const snap  = document.getElementById("pw-snapshot")  as HTMLInputElement | null;
   const file  = document.getElementById("pw-bdc-file")  as HTMLInputElement | null;
@@ -86,4 +92,5 @@ const mode = service_slug === "bdc-voice" ? "voice" : service_slug === "bdc-broa
     }
     PW.patchIntakeData(patch);
   });
+  } // end BDC step guard
 </script>
diff --git a/site/src/components/intake/steps/ClassificationWizard.astro b/site/src/components/intake/steps/ClassificationWizard.astro
index 39742c3..d31602d 100644
--- a/site/src/components/intake/steps/ClassificationWizard.astro
+++ b/site/src/components/intake/steps/ClassificationWizard.astro
@@ -214,8 +214,11 @@
     return { primary, categories: [...new Set(cats)], reason };
   }
 
-  // Render Q&A
-  const container = document.getElementById("cw-questions")!;
+  // Render Q&A. This script is bundled into every order page, so the container
+  // is absent on pages without the classification step — bail rather than throw
+  // on the top-level renderQuestion(0) call below (container.appendChild → null).
+  const container = document.getElementById("cw-questions");
+  if (container) {
   const answers: Record<string, string> = {};
   let questionIndex = 0;
 
@@ -306,4 +309,5 @@
 
   // Also start immediately if this is the current step
   renderQuestion(0);
+  } // end classification step guard
 </script>
diff --git a/site/src/components/intake/steps/DOTIntakeStep.astro b/site/src/components/intake/steps/DOTIntakeStep.astro
index c9641fd..e7161df 100644
--- a/site/src/components/intake/steps/DOTIntakeStep.astro
+++ b/site/src/components/intake/steps/DOTIntakeStep.astro
@@ -465,6 +465,7 @@
       if (dfwpRow) dfwpRow.hidden = false;
       if (dfwpStateEl && d.state_dfwp) dfwpStateEl.value = d.state_dfwp;
     }
+  });
 
   // Save all data on step-next
   window.addEventListener("pw:step-next", (evt) => {
diff --git a/site/src/components/intake/steps/EarthStationStep.astro b/site/src/components/intake/steps/EarthStationStep.astro
index 2dd707f..d87ed5d 100644
--- a/site/src/components/intake/steps/EarthStationStep.astro
+++ b/site/src/components/intake/steps/EarthStationStep.astro
@@ -83,7 +83,8 @@
     return row;
   }
 
-  document.getElementById("pw-add-circuit")!.addEventListener("click", () => {
+  const addCircuitBtn = document.getElementById("pw-add-circuit");
+  if (addCircuitBtn) addCircuitBtn.addEventListener("click", () => {
     circuitsDiv.appendChild(newCircuitRow());
   });
 
diff --git a/site/src/components/intake/steps/ForeignQualStep.astro b/site/src/components/intake/steps/ForeignQualStep.astro
index 551ce4a..0323f05 100644
--- a/site/src/components/intake/steps/ForeignQualStep.astro
+++ b/site/src/components/intake/steps/ForeignQualStep.astro
@@ -90,7 +90,13 @@
 </style>
 
 <script>
-  const grid = document.getElementById("pw-fq-grid")!;
+  // Guard: this step's script is bundled into every order page. Only initialize
+  // when the foreign-qualification grid is actually present, otherwise the many
+  // top-level getElementById(...)! lookups below return null and throw, killing
+  // the shared bundle (and any sibling step wired after it).
+  const fqGrid = document.getElementById("pw-fq-grid");
+  if (fqGrid) {
+  const grid = fqGrid as HTMLElement;
   const countEl = document.getElementById("pw-fq-count")!;
   const quoteDiv = document.getElementById("pw-fq-quote") as HTMLElement;
   const quoteBody = document.getElementById("pw-fq-quote-body")!;
@@ -238,4 +244,5 @@
   });
 
   loadJurisdictions();
+  } // end foreign_qual step guard
 </script>
diff --git a/site/src/components/intake/steps/ReviewStep.astro b/site/src/components/intake/steps/ReviewStep.astro
index 25ad70d..8832fcb 100644
--- a/site/src/components/intake/steps/ReviewStep.astro
+++ b/site/src/components/intake/steps/ReviewStep.astro
@@ -49,7 +49,15 @@ const vertical = slugVertical(service_slug);
 </style>
 
 <script>
-  const slug = document.querySelector(".pw-step[data-slug]")!.getAttribute("data-slug")!;
+  // The service slug MUST come from the wizard root, not the first
+  // `.pw-step[data-slug]`: on multi-step verticals (e.g. trucking) the DOT intake
+  // step renders before the review step and carries its own data-slug
+  // ("dot-intake"), so querySelector(".pw-step[data-slug]") returned the wrong
+  // value and the order-create POST sent service_slug="dot-intake" → HTTP 501,
+  // blocking every cold-visitor checkout on those pages.
+  const slug = document.querySelector(".pw-wizard[data-service]")?.getAttribute("data-service")
+    || document.querySelector(".pw-step[data-slug]")?.getAttribute("data-slug")
+    || "";
   const entDiv = document.getElementById("pw-summary-entity")!;
   const intakeDiv = document.getElementById("pw-summary-intake")!;
   const errDiv  = document.getElementById("pw-review-errors")  as HTMLDivElement;
diff --git a/site/src/components/intake/steps/STIRShakenStep.astro b/site/src/components/intake/steps/STIRShakenStep.astro
index 974d941..ccb12c8 100644
--- a/site/src/components/intake/steps/STIRShakenStep.astro
+++ b/site/src/components/intake/steps/STIRShakenStep.astro
@@ -69,7 +69,8 @@
     upstreamInput.style.display = showUpstream ? "" : "none";
   }
 
-  g<HTMLSelectElement>("pw-ss-status").addEventListener("change", updateSSFields);
+  const ssStatusEl = g<HTMLSelectElement>("pw-ss-status");
+  if (ssStatusEl) ssStatusEl.addEventListener("change", updateSSFields);
 
   window.addEventListener("pw:step-shown", (evt: any) => {
     if (evt.detail.step !== "stir_shaken") return;