fix(analytics,ui): remove duplicate contact conversion and add brand identity to homepage hero

- Remove redundant `trackConversion('contact_form_submission')` in contact-content-v3.tsx
  and rely on `trackContactForm(..., true)` to avoid double-counting conversions in GA4
- Update contact-content-v3.test.tsx assertions to match single analytics call
- Add Logo + company name + NOVALON to homepage HeroSection in home-content-v14.tsx
- Update homepage visual regression baselines across desktop/tablet/mobile
- Record progress in README.md

src/app/(marketing)/contact/contact-content-v3.test.tsx

@@ -370,10 +370,19 @@ describe('ContactContentV3 - 联系表单集成测试', () => {
       // 成功消息同时出现在 form 成功状态和 toast 中，用 getAllByText
       expect(screen.getAllByText('感谢您的留言，我们会尽快与您联系。').length).toBeGreaterThanOrEqual(1);
 
-      // Should have called analytics
+      // Should have called analytics exactly once via trackContactForm
       const { trackContactForm, trackConversion } = await import('@/lib/analytics');
-      expect(trackContactForm).toHaveBeenCalled();
-      expect(trackConversion).toHaveBeenCalledWith('contact_form_submission');
+      expect(trackContactForm).toHaveBeenCalledTimes(1);
+      expect(trackContactForm).toHaveBeenCalledWith(
+        expect.objectContaining({
+          name: '张三',
+          email: 'zhangsan@example.com',
+          company: '咨询产品方案',
+        }),
+        true,
+      );
+      // trackConversion 不应再被显式调用，避免重复上报 conversion
+      expect(trackConversion).not.toHaveBeenCalled();
     });
 
     it('should show error toast when API returns error', async () => {

src/app/(marketing)/contact/contact-content-v3.tsx

@@ -19,7 +19,7 @@ import {
   HelpCircle,
   ArrowRight,
 } from 'lucide-react';
-import { trackContactForm, trackConversion } from '@/lib/analytics';
+import { trackContactForm } from '@/lib/analytics';
 import { BreadcrumbSchema } from '@/components/seo/structured-data';
 import { LegacyTooltip as Tooltip } from '@/components/ui/tooltip';
 
@@ -166,12 +166,16 @@ function ContactFormContent({ data }: { data: ContactData }) {
       const resultData = await response.json();
 
       if (response.ok && (resultData.success === 'true' || resultData.success === true)) {
-        trackContactForm({
-          name: formData.name,
-          email: formData.email,
-          company: formData.subject,
-        });
-        trackConversion('contact_form_submission');
+        // trackContactForm 内部已发送 form_submit 事件并触发 conversion，
+        // 不再额外调用 trackConversion，避免同一个提交被重复计为两次转化。
+        trackContactForm(
+          {
+            name: formData.name,
+            email: formData.email,
+            company: formData.subject,
+          },
+          true,
+        );
         setToastMessage(data.successMessage || '提交成功！我们会尽快与您联系。');
         setToastType('success');
         setShowToast(true);

src/app/(marketing)/home-content-v14.tsx

@@ -1,12 +1,14 @@
 'use client';
 
 import { useRef } from 'react';
+import Image from 'next/image';
 import { motion } from 'framer-motion';
 import { ScrollReveal, StaggerReveal } from '@/components/ui/scroll-reveal';
 import { Badge } from '@/components/ui/badge';
 import { ArrowRight, Lightbulb, Database, Layers } from 'lucide-react';
 import { cn } from '@/lib/utils';
 import { EASE_OUT } from '@/components/ui/page-decoration';
+import { COMPANY_INFO } from '@/lib/constants';
 
 // ===== 服务数据降级兜底 =====
 const FALLBACK_SERVICES = [
@@ -104,6 +106,31 @@ function HeroSection({ heroData, stats }: {
 
       <div className="max-w-container mx-auto px-4 sm:px-6 lg:px-10 relative z-10 w-full py-24 sm:py-32 md:py-40 lg:py-48">
         <div className="max-w-4xl">
+          {/* 品牌标识：Logo + 公司名 */}
+          <motion.div
+            initial={{ opacity: 0, y: 20 }}
+            animate={{ opacity: 1, y: 0 }}
+            transition={{ duration: 0.6, delay: 0, ease: EASE_OUT }}
+            className="flex items-center gap-3 mb-8"
+          >
+            <Image
+              src="/logo.svg"
+              alt={`${COMPANY_INFO.name} Logo`}
+              width={48}
+              height={48}
+              className="h-10 w-auto sm:h-12"
+              priority
+            />
+            <div className="flex flex-col">
+              <span className="text-sm sm:text-base font-semibold text-ink leading-tight">
+                {COMPANY_INFO.name}
+              </span>
+              <span className="text-[10px] sm:text-xs tracking-[0.2em] text-text-muted uppercase">
+                NOVALON
+              </span>
+            </div>
+          </motion.div>
+
           {/* 主标题：大胆、直接 */}
           <motion.h1
             initial={{ opacity: 0, y: 40 }}