fix(character-art): resolve full character portrait from StarRailRes jsDelivr CDN and add robust portrait fallback handler

css/styles.css

@@ -1506,7 +1506,7 @@ input:checked + .slider:before {
   width: 100%;
   height: 100%;
   object-fit: cover;
-  object-position: top center;
+  object-position: center 25%;
   transition: transform 0.4s ease;
 }
 
@@ -2009,8 +2009,9 @@ input:checked + .slider:before {
   width: 100%;
   height: 100%;
   object-fit: cover;
-  object-position: top center;
+  object-position: center 25%;
   transition: transform 0.4s ease;
+  z-index: 1;
 }
 
 .overview-portrait-box:hover .overview-portrait-img {