style: center align left hero text column vertically with right illustration card

refer_landing_page/app/page.tsx

@@ -69,8 +69,8 @@ export default function HomePage() {
           </span>
         </div>
 
-        <div className="grid grid-cols-1 lg:grid-cols-12 gap-8 items-start">
-          <div className="lg:col-span-7 space-y-6">
+        <div className="grid grid-cols-1 lg:grid-cols-12 gap-8 lg:items-center">
+          <div className="lg:col-span-7 space-y-6 lg:pt-4">
             <h1 className="font-serif text-4xl sm:text-5xl lg:text-6xl font-normal text-ink leading-tight">
               멀티 에이전트 <br />
               <span className="italic font-serif text-vermillion">오케스트레이션</span>