优化界面布局

public/css/style.css

@@ -330,9 +330,9 @@ body {
 
 /* ---- Global Refresh Button ---- */
 .btn-refresh-global {
-  width: 32px;
-  height: 32px;
-  display: flex;
+  width: 40px;
+  height: 40px;
+  display: none;
   align-items: center;
   justify-content: center;
   background: var(--bg-card);
@@ -341,20 +341,18 @@ body {
   color: var(--text-secondary);
   cursor: pointer;
   transition: all 0.25s ease;
-  margin-left: 4px;
-  padding: 0;
 }
 
 .btn-refresh-global:hover {
   border-color: var(--border-hover);
   color: var(--accent-emerald);
   background: rgba(16, 185, 129, 0.08);
-  transform: translateY(-1px);
+  transform: translateY(-2px);
 }
 
 .btn-refresh-global svg {
-  width: 16px;
-  height: 16px;
+  width: 20px;
+  height: 20px;
 }
 
 /* ---- Theme Switch ---- */