修改大屏模块

public/favicon.svg

@@ -1,24 +1,23 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 32 32">
-  <!-- 背景圆形 -->
-  <circle cx="16" cy="16" r="15" fill="#0c1426" stroke="#00d4ff" stroke-width="2"/>
-  
-  <!-- 牛头轮廓 -->
-  <path d="M8 18 Q8 12 12 10 Q16 8 20 10 Q24 12 24 18 L22 20 Q20 22 16 22 Q12 22 10 20 Z" fill="#00d4ff" opacity="0.8"/>
-  
-  <!-- 牛角 -->
-  <path d="M10 12 Q8 10 7 8" stroke="#00ffff" stroke-width="2" fill="none" stroke-linecap="round"/>
-  <path d="M22 12 Q24 10 25 8" stroke="#00ffff" stroke-width="2" fill="none" stroke-linecap="round"/>
-  
-  <!-- 眼睛 -->
-  <circle cx="13" cy="15" r="1.5" fill="#ffffff"/>
-  <circle cx="19" cy="15" r="1.5" fill="#ffffff"/>
-  
-  <!-- 鼻子 -->
-  <ellipse cx="16" cy="18" rx="2" ry="1" fill="#ffffff" opacity="0.6"/>
-  
-  <!-- 数据点装饰 -->
-  <circle cx="6" cy="8" r="1" fill="#00ffff" opacity="0.6"/>
-  <circle cx="26" cy="8" r="1" fill="#00ffff" opacity="0.6"/>
-  <circle cx="6" cy="24" r="1" fill="#00ffff" opacity="0.6"/>
-  <circle cx="26" cy="24" r="1" fill="#00ffff" opacity="0.6"/>
+<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32" viewBox="0 0 64 64">
+  <defs>
+    <linearGradient id="bg" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#0c1426"/>
+      <stop offset="1" stop-color="#0a2a3b"/>
+    </linearGradient>
+    <filter id="glow" x="-50%" y="-50%" width="200%" height="200%">
+      <feGaussianBlur stdDeviation="2" result="blur"/>
+      <feMerge>
+        <feMergeNode in="blur"/>
+        <feMergeNode in="SourceGraphic"/>
+      </feMerge>
+    </filter>
+  </defs>
+  <!-- 背景圆 -->
+  <circle cx="32" cy="32" r="30" fill="url(#bg)" stroke="#00d4ff" stroke-width="2"/>
+  <!-- 牛字标识 -->
+  <g fill="#ffffff" font-family="'Microsoft YaHei','Arial'" font-weight="800" text-anchor="middle" filter="url(#glow)">
+    <text x="32" y="40" font-size="34">牛</text>
+  </g>
+  <!-- 亮边描边 -->
+  <circle cx="32" cy="32" r="30" fill="none" stroke="rgba(0,212,255,0.35)" stroke-width="2"/>
 </svg>