feat: 更新网站页面和组件，新增多个页面（关于、专家、会员、政策等）

public/hero/hero-3.svg

@@ -0,0 +1,21 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1600" height="900" viewBox="0 0 1600 900" role="img" aria-label="专家智库背景图">
+  <defs>
+    <linearGradient id="g3" x1="0" y1="1" x2="1" y2="0">
+      <stop offset="0" stop-color="#1E6FB5"/>
+      <stop offset="1" stop-color="#0F3D73"/>
+    </linearGradient>
+    <radialGradient id="r3" cx="75%" cy="35%" r="70%">
+      <stop offset="0" stop-color="rgba(43,166,154,0.30)"/>
+      <stop offset="1" stop-color="rgba(43,166,154,0)"/>
+    </radialGradient>
+  </defs>
+  <rect width="1600" height="900" fill="url(#g3)"/>
+  <rect width="1600" height="900" fill="url(#r3)"/>
+  <g stroke="rgba(255,255,255,0.12)" stroke-width="2" fill="none">
+    <circle cx="1260" cy="240" r="110"/>
+    <circle cx="1260" cy="240" r="170"/>
+    <circle cx="1260" cy="240" r="230"/>
+  </g>
+  <path d="M0 700C240 620 420 670 620 760C820 850 1040 850 1260 760C1480 670 1540 640 1600 620V900H0V700Z" fill="rgba(255,255,255,0.08)"/>
+</svg>
+