perf: tắt animation CSS vô hạn ít giá trị (ambient-pan, gradient-flow, breathe, glint)

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app/globals.css

@@ -240,7 +240,6 @@ a {
   background-size: 180% 100%, 84px 84px, 84px 84px;
   filter: none;
   opacity: 0.9;
-  animation: public-ambient-pan 18s ease-in-out infinite alternate;
 }
 
 .public-page::after {
@@ -988,7 +987,6 @@ a {
   -webkit-background-clip: text;
   background-clip: text;
   -webkit-text-fill-color: transparent;
-  animation: public-gradient-flow 8s ease-in-out infinite alternate;
 }
 
 .public-shimmer::after {
@@ -1161,19 +1159,6 @@ a {
     animation: public-header-drop 620ms cubic-bezier(0.16, 1, 0.3, 1) both;
   }
 
-  .public-header::after {
-    animation: public-header-glint 7s ease-in-out 1.2s infinite;
-  }
-
-  .public-logo-mark {
-    animation: public-logo-breathe 4.8s ease-in-out infinite;
-  }
-
-  .public-header-cta,
-  .public-cta {
-    animation: public-cta-breathe 4.2s ease-in-out infinite;
-  }
-
   .public-hero-inner::before {
     animation: public-line-draw 980ms cubic-bezier(0.16, 1, 0.3, 1) 120ms both;
   }
@@ -1182,14 +1167,6 @@ a {
     animation: public-line-draw 1100ms cubic-bezier(0.16, 1, 0.3, 1) 260ms both;
   }
 
-  .public-subpage-hero-image {
-    animation: public-photo-breathe 12s ease-in-out infinite alternate;
-  }
-
-  .public-hero-inner .public-image-stage {
-    animation: public-stage-float 7.2s ease-in-out 900ms infinite alternate;
-  }
-
   .public-hero-rule::before {
     animation: public-line-draw 980ms cubic-bezier(0.16, 1, 0.3, 1) 120ms both;
   }
@@ -1228,10 +1205,6 @@ a {
   .public-card:hover::after {
     animation: public-sheen 820ms cubic-bezier(0.16, 1, 0.3, 1);
   }
-
-  .public-back-to-top[data-visible="true"] {
-    animation: public-back-to-top-float 4.8s ease-in-out infinite;
-  }
 }
 
 @media (prefers-reduced-motion: reduce) {