diff --git a/.gitea/workflows/ci.yml b/.gitea/workflows/ci.yml
index 285dd68..37a3c83 100644
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -60,6 +60,16 @@ jobs:
       - name: ASGI import check
         working-directory: backend
         run: ../.venv-ci/bin/python -c "from config.asgi import application; print(type(application).__name__)"
+      - name: Production static assets check
+        working-directory: backend
+        env:
+          DJANGO_DEBUG: "false"
+          DJANGO_USE_HTTPS: "false"
+          DJANGO_SECRET_KEY: ci-static-assets-check
+          DJANGO_ALLOWED_HOSTS: localhost
+          DATABASE_URL: mysql://root:ci-root-password@mysql:3306/hulumath
+          REDIS_URL: redis://127.0.0.1:6379/0
+        run: ../.venv-ci/bin/python manage.py collectstatic --noinput --clear
       - name: SQLite tests and coverage
         run: |
           .venv-ci/bin/python -m pytest -q \
diff --git a/.gitea/workflows/deploy.yml b/.gitea/workflows/deploy.yml
index 061774d..85c7bf7 100644
--- a/.gitea/workflows/deploy.yml
+++ b/.gitea/workflows/deploy.yml
@@ -66,6 +66,17 @@ jobs:
         working-directory: backend
         run: ../.venv-release/bin/python -c "from config.asgi import application; print(type(application).__name__)"
 
+      - name: 生产静态资源完整性检查
+        working-directory: backend
+        env:
+          DJANGO_DEBUG: "false"
+          DJANGO_USE_HTTPS: "false"
+          DJANGO_SECRET_KEY: release-static-assets-check
+          DJANGO_ALLOWED_HOSTS: localhost
+          DATABASE_URL: mysql://root:ci-root-password@mysql:3306/hulumath
+          REDIS_URL: redis://127.0.0.1:6379/0
+        run: ../.venv-release/bin/python manage.py collectstatic --noinput --clear
+
       - name: MySQL 发布迁移检查
         env:
           DATABASE_URL: mysql://root:ci-root-password@mysql:3306/hulumath
diff --git a/backend/common/test_frontend_assets.py b/backend/common/test_frontend_assets.py
index 1beae50..fd92b75 100644
--- a/backend/common/test_frontend_assets.py
+++ b/backend/common/test_frontend_assets.py
@@ -1,6 +1,9 @@
+import re
 from pathlib import Path
 
 from django.conf import settings
+from django.core.management import call_command
+from django.test import override_settings
 
 STATIC_ROOT = Path(settings.BASE_DIR) / "static"
 
@@ -71,6 +74,41 @@ def test_toolbox_and_games_资源入口与移动端触控样式存在():
     assert "@media (max-width: 700px)" in styles
 
 
+def test_latex_默认源码可渲染且_katex_静态资源完整():
+    template = (settings.BASE_DIR / "templates" / "index.html").read_text(encoding="utf-8")
+    app = (STATIC_ROOT / "js" / "app.js").read_text(encoding="utf-8")
+    katex_root = STATIC_ROOT / "vendor" / "katex"
+    katex_css = (katex_root / "katex.min.css").read_text(encoding="utf-8")
+    font_paths = set(re.findall(r"url\(fonts/([^)]+)\)", katex_css))
+
+    assert (
+        '<textarea id="latex-source" spellcheck="false">'
+        r"\int_{0}^{1} x^2\,dx = \frac{1}{3}</textarea>"
+    ) in template
+    assert r"\\int_{0}^{1}" not in template
+    assert "function normalizeLatexSource(source)" in app
+    assert "globalThis.katex.render(normalized, target" in app
+    assert "throwOnError: true" in app
+    assert len(font_paths) == 60
+    assert all((katex_root / "fonts" / path).is_file() for path in font_paths)
+    assert (katex_root / "LICENSE.txt").is_file()
+
+
+def test_production_manifest_可处理全部静态资源(tmp_path):
+    storage = "whitenoise.storage.CompressedManifestStaticFilesStorage"
+    with override_settings(
+        STATIC_ROOT=tmp_path,
+        STORAGES={
+            "default": {"BACKEND": "django.core.files.storage.FileSystemStorage"},
+            "staticfiles": {"BACKEND": storage},
+        },
+    ):
+        call_command("collectstatic", interactive=False, clear=True, verbosity=0)
+
+    assert (tmp_path / "staticfiles.json").is_file()
+    assert (tmp_path / "vendor" / "katex" / "katex.min.css").is_file()
+
+
 def test_realtime_match_联机码与_websocket_前端资源存在():
     template = (settings.BASE_DIR / "templates" / "index.html").read_text(encoding="utf-8")
     realtime = (STATIC_ROOT / "js" / "realtime.js").read_text(encoding="utf-8")
diff --git a/backend/static/css/app.css b/backend/static/css/app.css
index 2a5d61c..a33aafb 100644
--- a/backend/static/css/app.css
+++ b/backend/static/css/app.css
@@ -161,7 +161,9 @@ button { color: inherit; }
 .editor-pane label, .preview-pane > span { display: block; color: #9eaaa2; font-size: 10px; letter-spacing: .16em; text-transform: uppercase; }
 .editor-pane textarea { width: 100%; height: 330px; margin-top: 22px; resize: none; border: 0; outline: 0; background: transparent; color: #dcefa1; font: 16px/1.8 "SFMono-Regular", Consolas, monospace; }
 .preview-pane { display: flex; flex-direction: column; }
-#latex-preview { margin: auto; max-width: 100%; overflow-wrap: anywhere; font: 28px/1.6 Georgia, serif; }
+#latex-preview { margin: auto; max-width: 100%; overflow-x: auto; overflow-y: hidden; padding: 18px 4px; font-size: 28px; line-height: 1.6; }
+#latex-preview .katex-display { margin: 0; overflow-x: auto; overflow-y: hidden; }
+#latex-preview.latex-preview-error { color: #b84136; font: 14px/1.7 system-ui, sans-serif; white-space: normal; }
 .preview-pane button { align-self: flex-end; }
 .profile-panel { padding: 35px; }
 .metric-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
diff --git a/backend/static/js/app.js b/backend/static/js/app.js
index 6f97f9b..3185c34 100644
--- a/backend/static/js/app.js
+++ b/backend/static/js/app.js
@@ -1060,15 +1060,40 @@ function switchTool(tool) {
   window.HuluToolbox?.activate(tool);
 }
 
+function normalizeLatexSource(source) {
+  let normalized = String(source || "").trim();
+  if (normalized.startsWith("$$") && normalized.endsWith("$$")) {
+    normalized = normalized.slice(2, -2).trim();
+  } else if (normalized.startsWith("\\[") && normalized.endsWith("\\]")) {
+    normalized = normalized.slice(2, -2).trim();
+  } else if (normalized.startsWith("$") && normalized.endsWith("$")) {
+    normalized = normalized.slice(1, -1).trim();
+  }
+  return normalized.replace(/\\\\(?=[A-Za-z,;:!])/g, "\\");
+}
+
 function renderLatexPreview(source) {
   const target = $("#latex-preview");
   target.replaceChildren();
-  if (!source.trim()) return;
-  if (typeof katex === "undefined") { target.textContent = source; return; }
+  target.classList.remove("latex-preview-error");
+  const normalized = normalizeLatexSource(source);
+  if (!normalized) return;
+  if (typeof globalThis.katex?.render !== "function") {
+    target.classList.add("latex-preview-error");
+    target.textContent = "公式渲染组件加载失败，请刷新页面后重试。";
+    return;
+  }
   try {
-    katex.render(source, target, { throwOnError: false, displayMode: true });
-  } catch {
-    target.textContent = source;
+    globalThis.katex.render(normalized, target, {
+      displayMode: true,
+      throwOnError: true,
+      trust: false,
+      maxExpand: 500,
+      maxSize: 20,
+    });
+  } catch (error) {
+    target.classList.add("latex-preview-error");
+    target.textContent = `公式语法错误：${error.message}`;
   }
 }
 
@@ -1077,7 +1102,10 @@ async function saveFormula() {
   try {
     await api("latex/documents/", {
       method: "POST",
-      body: { title: `公式 ${new Date().toLocaleString()}`, source: $("#latex-source").value },
+      body: {
+        title: `公式 ${new Date().toLocaleString()}`,
+        source: normalizeLatexSource($("#latex-source").value),
+      },
     });
     showToast("公式及首个版本已保存");
   } catch (error) {
diff --git a/backend/static/vendor/katex/LICENSE.txt b/backend/static/vendor/katex/LICENSE.txt
new file mode 100644
index 0000000..37c6433
--- /dev/null
+++ b/backend/static/vendor/katex/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013-2020 Khan Academy and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
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diff --git a/backend/static/vendor/katex/fonts/KaTeX_Typewriter-Regular.ttf b/backend/static/vendor/katex/fonts/KaTeX_Typewriter-Regular.ttf
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diff --git a/backend/templates/index.html b/backend/templates/index.html
index 04059f2..b4cd826 100644
--- a/backend/templates/index.html
+++ b/backend/templates/index.html
@@ -328,8 +328,8 @@
         <div class="tool-workspace" id="tool-latex">
           <div class="workspace-heading"><div><span class="kicker">LATEX LAB</span><h2>数学表达实验室</h2></div><p>源码、实时预览与版本保存。</p></div>
           <div class="editor-shell">
-            <div class="editor-pane"><label for="latex-source">LaTeX 源码</label><textarea id="latex-source" spellcheck="false">\\int_{0}^{1} x^2\\,dx = \\frac{1}{3}</textarea></div>
-            <div class="preview-pane"><span>实时预览</span><div id="latex-preview">\int_{0}^{1} x^2\,dx = \frac{1}{3}</div><button id="save-formula" class="primary-button">保存到我的公式</button></div>
+            <div class="editor-pane"><label for="latex-source">LaTeX 源码</label><textarea id="latex-source" spellcheck="false">\int_{0}^{1} x^2\,dx = \frac{1}{3}</textarea></div>
+            <div class="preview-pane"><span>实时预览</span><div id="latex-preview" role="status" aria-live="polite"></div><button id="save-formula" class="primary-button">保存到我的公式</button></div>
           </div>
         </div>
       </section>
diff --git a/scripts/deploy_production.sh b/scripts/deploy_production.sh
index d4fcbe3..6380b82 100755
--- a/scripts/deploy_production.sh
+++ b/scripts/deploy_production.sh
@@ -228,7 +228,7 @@ test -s "$BACKUP_FILE" || fail "数据库备份为空: $BACKUP_FILE"
 find "$BACKUP_DIR" -type f -name 'hulumath_*.sql.gz' -mtime +14 -delete
 log "数据库备份完成: $BACKUP_FILE"
 
-log "执行 Django 发布检查、迁移和静态资源收集"
+log "执行 Django 发布检查、静态资源收集和迁移"
 if [ -d "$PROJECT_DIR/backend/staticfiles" ]; then
   $SUDO chown -R "$DEPLOY_OWNER" "$PROJECT_DIR/backend/staticfiles"
 fi
@@ -240,8 +240,8 @@ else
   "$VENV_DIR/bin/python" manage.py check --deploy --fail-level ERROR --database default
 fi
 "$VENV_DIR/bin/python" manage.py check_mysql
-"$VENV_DIR/bin/python" manage.py migrate --noinput
 "$VENV_DIR/bin/python" manage.py collectstatic --noinput
+"$VENV_DIR/bin/python" manage.py migrate --noinput
 cd "$PROJECT_DIR"
 
 log "安装或更新 systemd 服务"