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icons/ic_insulation.svg

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+<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96" viewBox="0 0 96 96">
+  <defs>
+    <linearGradient id="grad3" x1="0%" y1="0%" x2="0%" y2="100%">
+      <stop offset="0%" style="stop-color:#F44336;stop-opacity:1" />
+      <stop offset="100%" style="stop-color:#D32F2F;stop-opacity:1" />
+    </linearGradient>
+  </defs>
+  <rect width="96" height="96" rx="20" fill="url(#grad3)" />
+  <g fill="white" transform="translate(24, 16)">
+    <!-- 锁图标 -->
+    <rect x="8" y="24" width="32" height="28" rx="4" fill="white" />
+    <path d="M14 24 V16 C14 8, 20 4, 24 4 C28 4, 34 8, 34 16 V24" stroke="white" stroke-width="4"
+      fill="none" />
+    <circle cx="24" cy="38" r="4" fill="#F44336" />
+    <rect x="22" y="40" width="4" height="6" fill="#F44336" />
+  </g>
+  <text x="48" y="82" font-family="Arial" font-size="10" fill="white" text-anchor="middle"
+    font-weight="bold">MΩ</text>
+</svg>