fix(contact): 修复提交表单宽度异常

FadeUp 组件缺少 lg:col-span-3 导致在 grid-cols-5 布局中仅占 1 列(153px)，
添加后正确占据 3 列(605px)

src/app/(marketing)/contact/page.tsx

@@ -10,8 +10,7 @@ import { Toast } from '@/components/ui/toast';
 import { Mail, MapPin, Send, Loader2, Clock, HeadphonesIcon, CheckCircle2 } from 'lucide-react';
 import { COMPANY_INFO } from '@/lib/constants';
 import { trackContactForm, trackConversion } from '@/lib/analytics';
-import { InkReveal, StaggerContainer, StaggerItem } from '@/lib/animations';
-import { ScrollReveal } from '@/components/ui/scroll-animations';
+import { InkReveal, StaggerContainer, StaggerItem, FadeUp } from '@/lib/animations';
 
 const contactFormSchema = z.object({
   name: z.string().min(2, '姓名至少需要2个字符'),
@@ -165,7 +164,7 @@ function ContactFormContent() {
           {/* 标题区 - InkReveal */}
           <InkReveal className="mb-16">
             <div className="flex items-center gap-3 mb-4">
-              <div className="w-8 h-px bg-linear-to-r from-[#1C1C1C] to-[var(--color-brand-primary)]" />
+              <div className="w-8 h-px bg-gradient-to-r from-[#1C1C1C] to-[var(--color-brand-primary)]" />
               <span className="text-sm text-[#5C5C5C] tracking-wide" data-testid="page-badge">联系我们</span>
             </div>
             <h1 className="text-4xl md:text-5xl font-bold text-[#1C1C1C] mb-4">
@@ -247,9 +246,9 @@ function ContactFormContent() {
               </StaggerItem>
             </StaggerContainer>
 
-            {/* 右侧表单 - ScrollReveal */}
-            <ScrollReveal delay={0.15}>
-              <div className="bg-[#F5F7FA] p-6 sm:p-8 rounded-lg border border-[#E2E8F0] flex-1 flex flex-col">
+            {/* 右侧表单 - FadeUp */}
+            <FadeUp delay={0.15} className="lg:col-span-3">
+              <div className="bg-[#F5F7FA] p-6 sm:p-8 rounded-lg border border-[#E2E8F0]">
                 <h2 className="text-lg font-semibold text-[#1A1A2E] mb-6">发送消息</h2>
                 
                 {isSubmitted ? (
@@ -261,7 +260,7 @@ function ContactFormContent() {
                     <p className="text-[#718096]">感谢您的留言，我们会尽快与您联系！</p>
                   </div>
                 ) : (
-                  <form onSubmit={handleSubmit} className="space-y-5 flex-1 flex flex-col">
+                  <form onSubmit={handleSubmit} className="space-y-5">
                     <input type="text" name="website" style={{ display: 'none' }} tabIndex={-1} autoComplete="off" />
                     <div className="grid grid-cols-1 sm:grid-cols-2 gap-4">
                       <Input 
@@ -332,7 +331,7 @@ function ContactFormContent() {
                       type="submit" 
                       data-testid="submit-button"
                       size="lg"
-                      className="w-full group mt-auto min-h-13 md:min-h-0"
+                      className="w-full group"
                       disabled={isSubmitting}
                     >
                       {isSubmitting ? (
@@ -350,7 +349,7 @@ function ContactFormContent() {
                   </form>
                 )}
               </div>
-            </ScrollReveal>
+            </FadeUp>
           </div>
         </div>
       </section>