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-1.svg

@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="1600" height="900" viewBox="0 0 1600 900" role="img" aria-label="智库要闻背景图">
+  <defs>
+    <linearGradient id="g1" x1="0" y1="0" x2="1" y2="1">
+      <stop offset="0" stop-color="#1E6FB5"/>
+      <stop offset="1" stop-color="#2BA69A"/>
+    </linearGradient>
+    <radialGradient id="r1" cx="70%" cy="20%" r="60%">
+      <stop offset="0" stop-color="rgba(255,255,255,0.18)"/>
+      <stop offset="1" stop-color="rgba(255,255,255,0)"/>
+    </radialGradient>
+  </defs>
+  <rect width="1600" height="900" fill="url(#g1)"/>
+  <rect width="1600" height="900" fill="url(#r1)"/>
+  <path d="M0 640C220 560 360 610 540 690C720 770 900 780 1120 700C1340 620 1460 560 1600 520V900H0V640Z" fill="rgba(255,255,255,0.10)"/>
+  <path d="M0 720C240 650 420 700 600 780C780 860 980 860 1220 780C1460 700 1520 670 1600 640V900H0V720Z" fill="rgba(15,23,42,0.10)"/>
+</svg>
+