feat(homepage): 新增独立授权与激活页 /license + 补齐定价页样式基础类

- 新增 homepage/license.html → dist/license.html + dist/license/index.html：
  交付与激活四步（邮件交付授权码）、LIC- 在线 与 LICOFF- 离线 对比、
  授权服务器 licence.rlwj.cn 通信范围说明、授权类型与价格、10 条授权 FAQ
- 补 style.css 缺失的定价/授权页共享基础类（wrap/section/sec-title/price-card/
  plan-tag/deal-note 等，暗色主题版）—— 修复 /pricing 页此前内容贴左、
  价格卡无卡片样式的线上缺陷（仅新增规则，未改动既有样式）
- tools/homepage-build 支持可选单页，产出 <name>.html 与 <name>/index.html
- 导航/页脚接入 /license，子页跨页锚点补 / 前缀、品牌 logo 回首页

tools/homepage-build/main.go

@@ -1,6 +1,6 @@
 // homepage-build：把 homepage/ 源(落地页+文档 md)构建为纯静态站点 homepage/dist/。
 // 产物可直接部署到任意静态托管(nginx/Pages)——官网与桌面二进制彻底解耦。
-// 用法: go run ./tools/homepage-build [-src homepage] [-out homepage/dist]
+// 用法(独立 Go 模块，须在其目录内运行): cd tools/homepage-build && go run . -src ../../homepage -out ../../homepage/dist
 package main
 
 import (
@@ -51,8 +51,8 @@ type Page struct {
 }
 
 var (
-	hRe   = regexp.MustCompile(`(?s)<(h[23])>(.*?)</h[23]>`)
-	tagRe = regexp.MustCompile(`<[^>]+>`)
+	hRe     = regexp.MustCompile(`(?s)<(h[23])>(.*?)</h[23]>`)
+	tagRe   = regexp.MustCompile(`<[^>]+>`)
 	mdNoise = regexp.MustCompile("(?s)```.*?```|`[^`]*`|!\\[[^\\]]*\\]\\([^)]*\\)|\\[[^\\]]*\\]\\([^)]*\\)|[#>*_\\-|]+")
 )
 
@@ -97,22 +97,39 @@ func writeFile(path, content string) {
 	fmt.Println("[OK]", path)
 }
 
+// copyTree 幂等地把 src 目录整棵拷到 dst：先清空 dst 再 CopyFS。
+// os.CopyFS 在目标文件已存在时会报错，故重建 dist 前必须先清空对应子目录。
+func copyTree(dst, src string) {
+	must(os.RemoveAll(dst), "清理 "+dst)
+	must(os.CopyFS(dst, os.DirFS(src)), "拷 "+dst)
+	fmt.Println("[OK]", dst)
+}
+
 func main() {
 	src := flag.String("src", "homepage", "源目录")
 	out := flag.String("out", "homepage/dist", "产物目录")
 	flag.Parse()
 
-	// 1) 落地页: 纯 HTML 直接拷 + site assets
-	raw, err := os.ReadFile(filepath.Join(*src, "index.html"))
-	must(err, "读 index.html")
-	writeFile(filepath.Join(*out, "index.html"), string(raw))
-	if raw2, err2 := os.ReadFile(filepath.Join(*src, "terms.html")); err2 == nil {
-		writeFile(filepath.Join(*out, "terms.html"), string(raw2))
+	// 1) 落地页与附加单页: 纯 HTML 直接拷 + site assets
+	// index.html 必需；pricing/terms/license 为可选页，源存在即产出。
+	// 附加页同时产出 <name>.html 与 <name>/index.html：兼容 nginx 的干净
+	// URL(location = /license) 与纯静态服务器(python -m http.server)。
+	for _, page := range []string{"index.html", "pricing.html", "terms.html", "license.html"} {
+		raw, err := os.ReadFile(filepath.Join(*src, page))
+		if err != nil {
+			if page == "index.html" {
+				must(err, "读 index.html")
+			}
+			continue
+		}
+		writeFile(filepath.Join(*out, page), string(raw))
+		if page != "index.html" {
+			writeFile(filepath.Join(*out, strings.TrimSuffix(page, ".html"), "index.html"), string(raw))
+		}
 	}
 	siteAssets := filepath.Join(*src, "assets")
 	if st, _ := os.Stat(siteAssets); st != nil {
-		must(os.CopyFS(filepath.Join(*out, "site", "assets"), os.DirFS(siteAssets)), "拷 site assets")
-		fmt.Println("[OK]", filepath.Join(*out, "site", "assets"))
+		copyTree(filepath.Join(*out, "site", "assets"), siteAssets)
 	}
 
 	// 2) 文档: manifest → goldmark 渲染 → docs.html 模板
@@ -135,7 +152,7 @@ func main() {
 			srcb, err := os.ReadFile(filepath.Join(*src, "content", def.File))
 			must(err, "读文档 "+def.File)
 			var buf strings.Builder
-		must(md.Convert(srcb, &buf), "渲染 "+def.File)
+			must(md.Convert(srcb, &buf), "渲染 "+def.File)
 			body, toc := injectHeadingIDs(buf.String())
 			p := &Page{Slug: def.Slug, Title: def.Title, Group: g.Name, Updated: def.Updated, HTML: body, TOC: toc, Prev: prev}
 			pages[def.Slug] = p
@@ -165,8 +182,7 @@ func main() {
 	// docs assets(模板引用 /docs/assets/*)
 	da := filepath.Join(*src, "docs-assets")
 	if st, _ := os.Stat(da); st != nil {
-		must(os.CopyFS(filepath.Join(*out, "docs", "assets"), os.DirFS(da)), "拷 docs assets")
-		fmt.Println("[OK]", filepath.Join(*out, "docs", "assets"))
+		copyTree(filepath.Join(*out, "docs", "assets"), da)
 	}
 	fmt.Printf("[DONE] %d 页文档 + 落地页 → %s（纯静态,可部署任意域名）\n", len(order), *out)
 }