fixed 修复首页闪烁的bug

themes/Ying/assets/css/main.css

@@ -3467,6 +3467,9 @@ input[type=submit] {
     /* GPU Acceleration for container */
     transform: translateZ(0);
     will-change: transform;
+    /* Ensure visibility stability */
+    opacity: 1; 
+    visibility: visible;
 }
 
 .floating-tools a {
@@ -3532,6 +3535,7 @@ input[type=submit] {
     will-change: opacity, transform, height;
 }
 
+/* Ensure consistent display state when active */
 #back-to-top.show {
     opacity: 1;
     visibility: visible;
@@ -3541,6 +3545,7 @@ input[type=submit] {
     transform: translate3d(0, 0, 0) scale(1);
     pointer-events: auto;
     border-width: 1px;
+    display: flex; /* Force flex display to keep icon centered */
 }
 
 #back-to-top.show:hover {