feat: improve model catalog aggregation

apps/web/src/styles/landing.css

@@ -21,7 +21,7 @@
 
 .releaseNotice span {
   color: var(--muted-foreground);
-  font-size: 13px;
+  font-size: 0.8125rem;
 }
 
 .landingHero {
@@ -43,14 +43,14 @@
 
 .landingCopy h1 {
   max-width: 720px;
-  font-size: 48px;
+  font-size: 3rem;
   line-height: 1.08;
 }
 
 .landingCopy p {
   max-width: 660px;
   color: var(--text-soft);
-  font-size: 16px;
+  font-size: 1rem;
   line-height: 1.75;
 }
 
@@ -102,12 +102,12 @@
 
 .previewGrid span {
   color: var(--muted-foreground);
-  font-size: 12px;
+  font-size: 0.75rem;
   font-weight: var(--font-weight-semibold);
 }
 
 .previewGrid strong {
-  font-size: 15px;
+  font-size: 0.9375rem;
 }
 
 .previewFlow {
@@ -115,7 +115,7 @@
   border-radius: 10px;
   background: var(--primary);
   color: #fff;
-  font-size: 12px;
+  font-size: 0.75rem;
   font-weight: var(--font-weight-semibold);
 }
 
@@ -134,7 +134,7 @@
 }
 
 .landingSectionHeader h2 {
-  font-size: 22px;
+  font-size: 1.375rem;
 }
 
 .coverageGrid,
@@ -161,18 +161,18 @@
 .landingFeatureCard span,
 .advantageCard p {
   color: var(--muted-foreground);
-  font-size: 13px;
+  font-size: 0.8125rem;
   line-height: 1.6;
 }
 
 .landingFeatureCard strong {
   display: block;
   margin: 8px 0;
-  font-size: 18px;
+  font-size: 1.125rem;
 }
 
 .advantageCard strong {
-  font-size: 17px;
+  font-size: 1.0625rem;
 }
 
 .loginRequiredPage {
@@ -208,7 +208,7 @@
   }
 
   .landingCopy h1 {
-    font-size: 34px;
+    font-size: 2.125rem;
   }
 
   .coverageGrid,