fixed 返回顶部功能

themes/Ying/static/css/main.css

@@ -756,6 +756,8 @@ ul {
     color: #111827;
     text-decoration: none;
     box-shadow: 0 10px 20px rgba(0, 0, 0, 0.06);
+    z-index: 2147483647; /* Ensure it's on top */
+    cursor: pointer;
 }
 
 #scrollUp::before {
@@ -2795,6 +2797,53 @@ img[atk-emoticon] {
 /* GenericInserted */ [data-theme="dark"] .chroma .gi { color:#50fa7b;font-weight:bold }
 /* GenericOutput */ [data-theme="dark"] .chroma .go { color:#44475a }
 /* GenericPrompt */ [data-theme="dark"] .chroma .gp {  }
+
+/* Back to Top Button */
+#back-to-top {
+    position: fixed;
+    bottom: 30px;
+    right: 30px;
+    width: 40px;
+    height: 40px;
+    background-color: var(--bankuai-color);
+    color: var(--text-content-color);
+    border-radius: 50%;
+    text-align: center;
+    line-height: 40px;
+    font-size: 24px;
+    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
+    cursor: pointer;
+    z-index: 2147483647;
+    opacity: 0;
+    visibility: hidden;
+    transition: opacity 0.3s, visibility 0.3s, background-color 0.3s, transform 0.3s;
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    text-decoration: none;
+}
+
+#back-to-top.show {
+    opacity: 1;
+    visibility: visible;
+}
+
+#back-to-top:hover {
+    background-color: var(--erji-color);
+    color: #fff;
+    transform: translateY(-3px);
+}
+
+[data-theme="dark"] #back-to-top {
+    background-color: var(--bankuai-dark-color);
+    color: var(--text-content-dark-color);
+    box-shadow: 0 2px 5px rgba(255,255,255,0.1);
+}
+
+[data-theme="dark"] #back-to-top:hover {
+    background-color: #444;
+    color: #fff;
+}
 /* GenericStrong */ [data-theme="dark"] .chroma .gs {  }
 /* GenericSubheading */ [data-theme="dark"] .chroma .gu { font-weight:bold }
 /* GenericTraceback */ [data-theme="dark"] .chroma .gt {  }