refactor: remove service detail modal component

src/app/(marketing)/cases/[id]/client.tsx

@@ -65,36 +65,27 @@ export function CaseDetailClient({ caseItem }: CaseDetailClientProps) {
 
   return (
     <main className="min-h-screen bg-white">
-      <div className="pt-16">
-        <div className="relative h-[40vh] min-h-[300px] bg-gradient-to-br from-[#C41E3A] to-[#8B1429] overflow-hidden">
-          <div className="absolute inset-0 bg-black/20" />
-          <div className="absolute inset-0 flex items-center justify-center">
-            <Building2 className="w-32 h-32 text-white/10" />
-          </div>
-          
-          <div className="absolute top-6 left-6 z-10">
-            <Link href="/cases">
-              <Button variant="ghost" className="text-white hover:bg-white/10">
-                <ArrowLeft className="w-4 h-4 mr-2" />
-                返回案例
-              </Button>
-            </Link>
-          </div>
-
-          <div className="absolute bottom-0 left-0 right-0 p-8 bg-gradient-to-t from-black/60 to-transparent">
-            <div className="container-wide">
-              <Badge className="mb-4 bg-white/20 text-white hover:bg-white/30">
-                {caseItem.industry}
-              </Badge>
-              <h1 className="text-3xl sm:text-4xl lg:text-5xl font-semibold text-white mb-2">
-                {caseItem.title}
-              </h1>
-              <p className="text-lg text-white/80">
-                {caseItem.client}
-              </p>
-            </div>
+      <div className="relative overflow-hidden bg-gradient-to-b from-[#FAFAFA] to-white">
+        <div className="container-wide relative z-10 pt-32 pb-20">
+          <Link href="/cases">
+            <Button variant="ghost" className="text-[#5C5C5C] hover:text-[#C41E3A] hover:bg-[#C41E3A]/10">
+              <ArrowLeft className="w-4 h-4 mr-2" />
+              返回案例
+            </Button>
+          </Link>
+          <div className="max-w-4xl mt-8">
+            <Badge className="mb-4 bg-[#C41E3A]/10 text-[#C41E3A] hover:bg-[#C41E3A]/20">
+              {caseItem.industry}
+            </Badge>
+            <h1 className="text-3xl sm:text-4xl lg:text-5xl font-semibold text-[#1C1C1C] mb-2">
+              {caseItem.title}
+            </h1>
+            <p className="text-lg text-[#5C5C5C]">
+              {caseItem.client}
+            </p>
           </div>
         </div>
+      </div>
 
         <div ref={contentRef} className="container-wide py-12 md:py-16">
           <div