refactor(link): 营销页站内链接统一 StaticLink（静态托管适配）+ 删除 0 引用死代码组件 + QA 页 client/server 拆分

src/app/(marketing)/services/service-detail-content-v4.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { motion } from 'framer-motion';
+import { StaticLink } from '@/components/ui/static-link';
 import { ArrowUpRight, CheckCircle2, Zap, Clock, Users, Award, TrendingUp, Shield } from 'lucide-react';
 import type { LucideIcon } from 'lucide-react';
 import type { Service, CaseStudy } from '@/lib/constants/services';
@@ -80,13 +81,13 @@ function DetailHero({ service }: { service: Service }) {
             transition={{ duration: 0.8, delay: 0.9, ease: EASE_OUT }}
             className="flex flex-col sm:flex-row gap-4 sm:gap-6"
           >
-            <a
+            <StaticLink
               href="/contact"
               className="group inline-flex items-center justify-center gap-3 px-10 py-5 font-semibold text-base bg-brand text-white transition-all duration-300 hover:bg-brand/90 min-h-[52px] touch-manipulation"
             >
               免费咨询
               <ArrowUpRight className="w-4 h-4 transition-transform duration-300 group-hover:translate-x-0.5 group-hover:-translate-y-0.5" />
-            </a>
+            </StaticLink>
             <a
               href="#cases"
               className="inline-flex items-center justify-center gap-3 px-10 py-5 font-semibold text-base text-ink border border-border-primary hover:border-ink/30 transition-all duration-300 min-h-[52px] touch-manipulation"
@@ -336,19 +337,19 @@ function CTASection() {
             首次咨询免费，没有任何销售压力。
           </p>
           <div className="flex flex-col sm:flex-row gap-4 sm:gap-6">
-            <a
+            <StaticLink
               href="/contact"
               className="group inline-flex items-center justify-center gap-3 px-10 py-5 font-semibold text-base bg-brand text-white transition-all duration-300 hover:bg-brand/90 min-h-[52px] touch-manipulation"
             >
               预约免费咨询
               <ArrowUpRight className="w-4 h-4 transition-transform duration-300 group-hover:translate-x-0.5 group-hover:-translate-y-0.5" />
-            </a>
-            <a
+            </StaticLink>
+            <StaticLink
               href="/services"
               className="inline-flex items-center justify-center gap-3 px-10 py-5 font-semibold text-base text-ink border border-border-primary hover:border-ink/30 transition-all duration-300 min-h-[52px] touch-manipulation"
             >
               返回服务列表
-            </a>
+            </StaticLink>
           </div>
         </motion.div>
       </div>