添加总体说明组件内容

boniu/src/components/Overview/overview.css

@@ -0,0 +1,17 @@
+.overview-title {
+    display: flex;
+    align-items: center;
+}
+.overview-title::before {
+    content: "";
+    margin-right: 10px;
+    display: block;
+    width: 6px;
+    height: 20px;
+    border-radius: 3px;
+    background-color: #00c0ff;
+}
+
+.margin-top-20 {
+    margin-top: 1.2em;
+}

boniu/src/components/StocksInfo/stocksInfo.jsx

@@ -92,4 +92,4 @@ const errColumns = [
     dataIndex: "message",
     key: "message",
   },
-]
+]