chore(site): 优化网站性能与样式细节

- 将 jQuery 引用从 BootCDN 改为本地文件以提升加载速度
- 移除页面 body 标签中的禁止右键和选择属性，提高用户体验
- 为事件监听器添加 passive 选项以提升滚动性能
- 调整 StarrySky.js 中 canvas 阴影模糊值以优化视觉效果
- 更新 CSS 样式颜色值，增强文字可读性与整体美观度
- 统一并优化部分文本阴影及字体抗锯齿设置

css/style.css

@@ -262,7 +262,7 @@ pre code { padding: 0; background: none; border: none; word-wrap: normal; }
   font-size: 1.3em;
   font-weight: normal;
   letter-spacing: 2px;
-  color: #f0f0f0;
+  color: #ffffff;
   -webkit-font-smoothing: antialiased;
   margin-bottom: 20px;
 }
@@ -275,7 +275,7 @@ pre code { padding: 0; background: none; border: none; word-wrap: normal; }
   line-height: 2;
   letter-spacing: 2px;
   color: #ffffff;
-  text-shadow: 0 1px 2px rgba(141, 114, 114, 0.2) !important;
+  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4) !important;
   position: relative;
   z-index: 1;
   font-feature-settings: 'kern' 1;
@@ -872,7 +872,7 @@ nav {
 
 .weixin-qrcode-desc {
   font-size: 14px;
-  color: #666;
+  color: #555;
   margin-bottom: 15px;
 }
 
@@ -986,12 +986,12 @@ nav {
   display: inline-block;
   margin: 0 5px;
   font-size: 0.5em;
-  color: rgba(255, 255, 255, 0.7);
+  color: rgba(255, 255, 255, 0.85);
   line-height: 1.2;
 }
 
 .power a {
-  color: rgba(255, 255, 255, 0.8);
+  color: rgba(255, 255, 255, 0.95);
   font-size: 0.5em;
   text-decoration: none;
   transition: color 0.3s ease;
@@ -1006,8 +1006,7 @@ nav {
 .remark .power:not(:last-child):after {
   content: "|";
   margin-left: 8px;
-  color: rgba(255, 255, 255, 0.5);
-  color: rgba(255, 255, 255, 0.5);
+  color: rgba(255, 255, 255, 0.7);
 }