diff --git a/src/assets/brand-logo.svg b/src/assets/brand-logo.svg
index 48c24c6..814b020 100644
--- a/src/assets/brand-logo.svg
+++ b/src/assets/brand-logo.svg
@@ -1,14 +1,13 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="116" height="30" viewBox="0 0 116 30" role="img" aria-label="Mach">
+<svg width="110" height="110" viewBox="0 0 110 110" xmlns="http://www.w3.org/2000/svg">
+  <!-- 赛博机械箭头融入首字母M，白色线条，透明背景，宽高比 240:110 < 2:1 -->
   <defs>
-    <filter id="brand-glow" x="-40%" y="-80%" width="180%" height="260%">
-      <feGaussianBlur stdDeviation="1.6" result="blur" />
-      <feMerge>
-        <feMergeNode in="blur" />
-        <feMergeNode in="blur" />
-        <feMergeNode in="SourceGraphic" />
-      </feMerge>
-    </filter>
+    <style>
+      .stroke-line { stroke:#ffffff; stroke-width:10; fill:none; stroke‑linecap:square; stroke‑linejoin:miter; }
+      .text-brand { fill:#ffffff; font-family:"Segoe UI",system‑ui,sans‑serif; font-weight:600; font-size:48; letter-spacing:2; }
+    </style>
   </defs>
-  <text x="1" y="24" fill="#ffffff" font-family="'Noto Sans SC','Source Code Pro',monospace" font-size="21" font-weight="700" letter-spacing="5" filter="url(#brand-glow)">Mach</text>
-  <line x1="2" y1="28" x2="100" y2="28" stroke="#7ff0ff" stroke-width="1.2" opacity="0.9" stroke-linecap="round" />
+  <!-- M左侧改造为向前箭头，赛博切角机械结构 -->
+  <path class="stroke-line" d="M20 95 L42 25 L64 85 L86 25 L108 95" />
+  <path class="stroke-line" d="M20 50 L32 43 L20 20" />
+  <path class="stroke-line" d="M108 50 L96 43 L108 20" />
 </svg>