feat: flowing gold side lines + pure glass header

- DecorativeLines: SVG flowing bezier curves on both sides, gold
  gradient with fade at top/bottom, desktop only (xl+), starts
  after hero section
- Header: pure backdrop-blur-xl glass with no bg color overlay,
  subtle border-white/8% bottom line
- Removed old straight CSS lines from body

src/app/globals.css

@@ -26,36 +26,6 @@ body {
   overflow-x: hidden;
 }
 
-/* ===== Decorative side lines (desktop only) ===== */
-
-@media (min-width: 1280px) {
-  body::before,
-  body::after {
-    content: "";
-    position: fixed;
-    top: 0;
-    bottom: 0;
-    width: 1px;
-    z-index: 40;
-    pointer-events: none;
-    background: linear-gradient(
-      180deg,
-      transparent 0%,
-      rgba(201, 169, 110, 0.15) 15%,
-      rgba(201, 169, 110, 0.25) 50%,
-      rgba(201, 169, 110, 0.15) 85%,
-      transparent 100%
-    );
-  }
-
-  body::before {
-    left: clamp(16px, 3vw, 48px);
-  }
-
-  body::after {
-    right: clamp(16px, 3vw, 48px);
-  }
-}
 
 /* ===== Selection ===== */
 

src/app/page.tsx

@@ -10,6 +10,7 @@ import { FAQ } from "@/components/sections/FAQ";
 import { Contact } from "@/components/sections/Contact";
 import { BackToTop } from "@/components/ui/BackToTop";
 import { FloatingContact } from "@/components/ui/FloatingContact";
+import { DecorativeLines } from "@/components/ui/DecorativeLines";
 import { Header } from "@/components/layout/Header";
 import { Footer } from "@/components/layout/Footer";
 import { ClientShell } from "@/components/layout/ClientShell";
@@ -29,6 +30,8 @@ export default function HomePage() {
         <Header />
         <main id="main-content">
           {content?.hero && <Hero data={content.hero} />}
+          <div className="relative">
+          <DecorativeLines />
           {content?.about && (
             <About
               data={content.about}
@@ -48,6 +51,7 @@ export default function HomePage() {
           {content?.news && <News data={content.news} />}
           {content?.faq && <FAQ data={content.faq} />}
           {content?.contact && <Contact data={content.contact} />}
+          </div>
           <BackToTop />
           <FloatingContact />
         </main>

src/components/layout/Header.tsx

@@ -126,7 +126,7 @@ export function Header() {
     <header
       className={`fixed top-0 z-50 w-full transition-all duration-500 ${
         scrolled || menuOpen
-          ? "bg-white/60 backdrop-blur-xl border-b border-neutral-200/30 dark:bg-black/40 dark:border-white/[0.06]"
+          ? "backdrop-blur-xl border-b border-white/[0.08]"
           : "bg-transparent"
       }`}
     >

src/components/ui/DecorativeLines.tsx

@@ -0,0 +1,57 @@
+/**
+ * Decorative flowing gold lines on both sides of the page.
+ * Desktop only (hidden below xl). Positioned absolute within a wrapper.
+ */
+export function DecorativeLines() {
+  return (
+    <div className="pointer-events-none absolute inset-0 overflow-hidden hidden xl:block" aria-hidden="true">
+      {/* Left line */}
+      <svg
+        className="absolute left-[2vw] top-0 h-full w-16"
+        viewBox="0 0 60 2000"
+        preserveAspectRatio="none"
+        fill="none"
+      >
+        <path
+          d="M30 0 C45 120, 15 250, 35 400 S10 550, 30 700 S50 850, 25 1000 S5 1150, 35 1300 S55 1450, 30 1600 S10 1750, 30 2000"
+          stroke="url(#goldGradientL)"
+          strokeWidth="0.8"
+          strokeLinecap="round"
+        />
+        <defs>
+          <linearGradient id="goldGradientL" x1="0" y1="0" x2="0" y2="1">
+            <stop offset="0%" stopColor="rgb(201,169,110)" stopOpacity="0" />
+            <stop offset="10%" stopColor="rgb(201,169,110)" stopOpacity="0.15" />
+            <stop offset="50%" stopColor="rgb(201,169,110)" stopOpacity="0.25" />
+            <stop offset="90%" stopColor="rgb(201,169,110)" stopOpacity="0.15" />
+            <stop offset="100%" stopColor="rgb(201,169,110)" stopOpacity="0" />
+          </linearGradient>
+        </defs>
+      </svg>
+
+      {/* Right line */}
+      <svg
+        className="absolute right-[2vw] top-0 h-full w-16"
+        viewBox="0 0 60 2000"
+        preserveAspectRatio="none"
+        fill="none"
+      >
+        <path
+          d="M30 0 C10 150, 50 300, 25 450 S45 600, 30 750 S5 900, 35 1050 S55 1200, 25 1400 S10 1550, 30 1700 S50 1850, 30 2000"
+          stroke="url(#goldGradientR)"
+          strokeWidth="0.8"
+          strokeLinecap="round"
+        />
+        <defs>
+          <linearGradient id="goldGradientR" x1="0" y1="0" x2="0" y2="1">
+            <stop offset="0%" stopColor="rgb(201,169,110)" stopOpacity="0" />
+            <stop offset="10%" stopColor="rgb(201,169,110)" stopOpacity="0.15" />
+            <stop offset="50%" stopColor="rgb(201,169,110)" stopOpacity="0.25" />
+            <stop offset="90%" stopColor="rgb(201,169,110)" stopOpacity="0.15" />
+            <stop offset="100%" stopColor="rgb(201,169,110)" stopOpacity="0" />
+          </linearGradient>
+        </defs>
+      </svg>
+    </div>
+  );
+}