diff --git a/app/globals.css b/app/globals.css
index a9073d7..bb62def 100644
--- a/app/globals.css
+++ b/app/globals.css
@@ -246,7 +246,7 @@ select:focus, input:focus, textarea:focus { border-color: var(--blue); box-shado
 .section-heading > p { max-width: 480px; margin: 0; color: #6e7a8e; line-height: 1.8; font-size: 13px; }
 .catalog-summary {
   display: grid;
-  grid-template-columns: repeat(8, 1fr);
+  grid-template-columns: repeat(7, 1fr);
   gap: 9px;
   margin-bottom: 22px;
 }
@@ -266,6 +266,7 @@ select:focus, input:focus, textarea:focus { border-color: var(--blue); box-shado
 .catalog-summary button.active { border-color: var(--blue); background: var(--blue-soft); }
 .catalog-summary strong { color: var(--blue); font-size: 19px; }
 .catalog-summary span { color: #748196; font-size: 10px; }
+.catalog-category-note { margin: -8px 2px 18px; color: #8792a3; font-size: 10px; line-height: 1.6; }
 .catalog-toolbar {
   position: sticky;
   top: 74px;
@@ -311,6 +312,7 @@ select:focus, input:focus, textarea:focus { border-color: var(--blue); box-shado
   font-size: 10px;
 }
 .category-pills button.active { border-color: var(--blue); color: white; background: var(--blue); }
+.category-pills button.feature-filter:not(.active) { border-color: #f1bf92; color: #a75a19; background: #fff9f3; }
 .catalog-result-count { margin: 11px 2px 0; color: #8792a3; font-size: 10px; }
 .catalog-result-count strong { color: var(--blue); font-size: 12px; }
 .catalog-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@@ -492,6 +494,7 @@ footer > span { color: #9aa4b2; font-size: 10px; }
   .capability-strip div:nth-child(2) { border-right: 0; }
   .section-heading { align-items: flex-start; flex-direction: column; gap: 18px; }
   .catalog-summary { grid-template-columns: repeat(2, 1fr); }
+  .catalog-summary button:last-child { grid-column: 1 / -1; }
   .catalog-toolbar { top: 64px; }
   .catalog-grid { grid-template-columns: 1fr; gap: 15px; }
   .catalog-image-button { height: 280px; }
diff --git a/app/page.tsx b/app/page.tsx
index dd23f18..d15b48c 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -32,18 +32,18 @@ const APPLICATIONS = [
   { name: "工业设备", note: "控制机构与定制传动组件" },
 ];
 
-const CATALOG_CATEGORIES = [
-  "全部产品",
+const PRIMARY_CATALOG_CATEGORIES = [
   "标准舵机",
   "异形舵机",
   "全金属舵机",
   "大扭矩舵机",
   "积木舵机",
-  "静音舵机",
   "标准齿轮箱",
   "翻盖电机",
 ];
 
+const CATALOG_FILTER_CATEGORIES = ["全部产品", ...PRIMARY_CATALOG_CATEGORIES, "静音舵机"];
+
 const FEATURED_SPEC_ORDER = [
   "堵转扭矩",
   "额定电压",
@@ -66,7 +66,6 @@ function getFeaturedSpecs(product: CatalogProduct) {
 const SERVO_CATEGORIES = ["标准舵机", "异形舵机", "全金属舵机", "大扭矩舵机", "积木舵机"];
 const SILENT_SERVO_CATEGORY = "静音舵机";
 const CUSTOM_SERVO_CATEGORY = "非标准舵机定制";
-const SELECTOR_CATEGORIES = [...SERVO_CATEGORIES, SILENT_SERVO_CATEGORY, CUSTOM_SERVO_CATEGORY];
 const TORQUE_MIN = 0.09;
 const TORQUE_MAX = 920;
 const TORQUE_PRESETS = [0.1, 1, 5, 20, 100, 300, 920];
@@ -446,13 +445,22 @@ export default function Home() {
                         onChange={(event) => update("category", event.target.value)}
                       >
                         <option value="全部舵机">全部舵机（243款）</option>
-                        {SELECTOR_CATEGORIES.map((category) => (
-                          <option key={category} value={category}>
-                            {category === CUSTOM_SERVO_CATEGORY
-                              ? `${category}（联系我们）`
-                              : `${category}（${getCategoryCount(category)}款）`}
-                          </option>
-                        ))}
+                        <optgroup label="官方产品系列">
+                          {SERVO_CATEGORIES.map((category) => (
+                            <option key={category} value={category}>
+                              {category}（{getCategoryCount(category)}款）
+                            </option>
+                          ))}
+                        </optgroup>
+                        <optgroup label="特色筛选与定制">
+                          {[SILENT_SERVO_CATEGORY, CUSTOM_SERVO_CATEGORY].map((category) => (
+                            <option key={category} value={category}>
+                              {category === CUSTOM_SERVO_CATEGORY
+                                ? `${category}（联系我们）`
+                                : `${category}（${getCategoryCount(category)}款）`}
+                            </option>
+                          ))}
+                        </optgroup>
                       </select>
                     </label>
                     <label className="select-field">
@@ -836,11 +844,11 @@ export default function Home() {
             <p className="eyebrow"><span /> 官方产品目录 · 2026.06</p>
             <h2>完整收录280个产品型号</h2>
           </div>
-          <p>覆盖标准、异形、静音、全金属、大扭矩和积木舵机，以及标准齿轮箱与翻盖电机。参数来自高徳乐官方产品型号表。</p>
+          <p>官方目录按七个主分类收录280款产品；静音舵机作为特色子集筛选，不重复计入产品总数。</p>
         </div>
 
         <div className="catalog-summary" aria-label="产品分类统计">
-          {CATALOG_CATEGORIES.slice(1).map((category) => (
+          {PRIMARY_CATALOG_CATEGORIES.map((category) => (
             <button
               type="button"
               key={category}
@@ -855,6 +863,7 @@ export default function Home() {
             </button>
           ))}
         </div>
+        <p className="catalog-category-note">分类已按官方目录29页表头复核 · 七个主分类合计280款 · 静音舵机11款为标准舵机特色子集</p>
 
         <div className="catalog-toolbar">
           <label className="catalog-search">
@@ -873,16 +882,16 @@ export default function Home() {
             )}
           </label>
           <div className="category-pills" aria-label="产品类别筛选">
-            {CATALOG_CATEGORIES.map((category) => (
+            {CATALOG_FILTER_CATEGORIES.map((category) => (
               <button
                 type="button"
                 key={category}
-                className={catalogCategory === category ? "active" : ""}
+                className={`${catalogCategory === category ? "active" : ""} ${category === SILENT_SERVO_CATEGORY ? "feature-filter" : ""}`}
                 onClick={() => {
                   setCatalogCategory(category);
                   setCatalogLimit(24);
                 }}
-              >{category}</button>
+              >{category === SILENT_SERVO_CATEGORY ? `${category} · ${SILENT_SERVO_COUNT}` : category}</button>
             ))}
           </div>
           <p className="catalog-result-count">
diff --git a/scripts/extract_catalog.py b/scripts/extract_catalog.py
index 631e250..ed579b7 100644
--- a/scripts/extract_catalog.py
+++ b/scripts/extract_catalog.py
@@ -142,6 +142,12 @@ def main() -> None:
     with pdfplumber.open(PDF_PATH) as pdf:
         for page_number, page in enumerate(pdf.pages, 1):
             category = CATEGORY_BY_PAGE[page_number]
+            page_text = clean(page.extract_text() or "")
+            expected_heading = f"{category}产品明细表"
+            if expected_heading not in page_text:
+                raise RuntimeError(
+                    f"Category heading mismatch on page {page_number}: expected {expected_heading}"
+                )
             tables = page.find_tables()
             if not tables:
                 raise RuntimeError(f"No table found on page {page_number}")