Increase header height to 72px and enlarge logo

Bumped the top banner from 64px to 72px and the logo from 34px to 42px
for better visual presence. Updated body padding and mobile nav offset
to match.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: congwang-mk

_layouts/default.html

@@ -49,7 +49,7 @@
         position: fixed;
         top: 0; left: 0; right: 0;
         width: 100%;
-        height: 64px;
+        height: 72px;
         background: rgba(15, 23, 42, 0.97);
         backdrop-filter: blur(16px);
         -webkit-backdrop-filter: blur(16px);
@@ -60,7 +60,7 @@
         max-width: 1280px;
         margin: 0 auto;
         padding: 0 40px;
-        height: 64px;
+        height: 72px;
         display: flex;
         align-items: center;
         gap: 32px;
@@ -72,7 +72,7 @@
         flex-shrink: 0;
     }
     .site-logo img {
-        height: 34px;
+        height: 42px;
         width: auto;
     }
     .site-nav {
@@ -265,7 +265,7 @@
     .site-mobile-nav {
         display: none;
         position: fixed;
-        top: 64px;
+        top: 72px;
         left: 0;
         right: 0;
         bottom: 0;

assets/css/styles.css

@@ -171,7 +171,7 @@ body {
     -webkit-font-smoothing: antialiased;
     -moz-osx-font-smoothing: grayscale;
     text-rendering: optimizeLegibility;
-    padding-top: 64px;
+    padding-top: 72px;
     overflow-x: hidden;
 }
 
@@ -1257,7 +1257,7 @@ body {
 
 @media (max-width: 768px) {
     body {
-        padding-top: 64px;
+        padding-top: 72px;
     }
 
     .header-container {