fix(visual): 1:1 banner/hero/modal + strip non-zibll card chrome

Align banner s-desc caption/scale-height, hero search pill and -40px cards, modal colorful header/spring scale; remove white/pink card borders and hover lifts across mainline surfaces.

assets/css/common/floating.css

@@ -31,7 +31,7 @@
   width: 40px;
   height: 40px;
   background: var(--blur-bg);
-  border: 1px solid rgba(255, 255, 255, 0.55);
+  border: none;
   border-radius: var(--radius-full);
   box-shadow: var(--shadow-sm);
   backdrop-filter: saturate(2) blur(12px);
@@ -58,7 +58,7 @@
   color: #fff;
   border-color: var(--color-primary);
   box-shadow: var(--shadow-lg);
-  transform: translateY(-2px);
+  transform: none;
 }
 
 .floating-btn:active {