修改全屏按钮

css/header.css

@@ -34,12 +34,11 @@ header .toggle-menu:hover {
 /* 头部全屏按钮样式（仅大屏幕显示） */
 #fullscreen-button {
     position: absolute;
-    right: 16px;
+    right: 12px;
     top: 0px;
     background: none;
     border: none;
     cursor: pointer;
-    font-size: 32px;
     display: flex;
     align-items: center;
     transition: top 0.3s ease,transform 0.3s ease-in-out, padding 0.3s ease-in-out; /* 平滑放大动画 */