重构：移动源码到 src/ 目录，支持 CLI 构建

src/static/customicons.css

@@ -0,0 +1,20 @@
+@font-face {
+  font-family: "customicons"; /* Project id 2878519 */
+  src:url('/static/customicons.ttf') format('truetype');
+}
+
+.customicons {
+  font-family: "customicons" !important;
+}
+
+.youxi:before {
+  content: "\e60e";
+}
+
+.wenjian:before {
+  content: "\e60f";
+}
+
+.zhuanfa:before {
+  content: "\e610";
+}