feat(website): 官网多页面 + 中英文切换 + Kimi 风格科技风重设计

- 多页路由：首页 / 功能 / 更新日志 / 下载（HashRouter，适配 GitHub Pages）
- 中英文切换（zh/en 双语文案 + localStorage 记忆）
- Kimi 品牌配色（中性灰 + 蓝）+ 科技风（网格底纹 / 辉光按钮 / 渐变强调词）
- 更新日志页：运行时同步 GitHub Releases，localStorage 缓存 1h，网络失败回退内置列表
- 功能页 8 张截图卡片；下载页含自动更新说明
- 修复资源路径 404（asset() + %BASE_URL%）；自托管 Inter/Fira Code 字体

website/src/sections/Privacy.tsx

@@ -0,0 +1,37 @@
+import SectionShell from "../components/SectionShell";
+import { Database, LinkSimple, BookOpen, type Icon } from "@phosphor-icons/react";
+import { useLang } from "../i18n";
+
+const icons: Record<string, Icon> = {
+  local: Database,
+  direct: LinkSimple,
+  open: BookOpen,
+};
+
+export default function Privacy() {
+  const { t } = useLang();
+  return (
+    <SectionShell
+      id="privacy"
+      title={t.privacy.title}
+      subtitle={t.privacy.subtitle}
+    >
+      <div className="grid grid-cols-1 gap-4 md:grid-cols-3">
+        {t.privacy.items.map((it) => {
+          const Icon = icons[it.id] ?? Database;
+          return (
+            <div key={it.id} className="card">
+              <div className="mb-3 flex h-10 w-10 items-center justify-center rounded-xl border border-primary/25 bg-primary/10 text-primary">
+                <Icon className="h-5 w-5" weight="duotone" />
+              </div>
+              <h3 className="mb-2 text-lg font-semibold">{it.title}</h3>
+              <p className="text-sm leading-relaxed text-muted-foreground">
+                {it.desc}
+              </p>
+            </div>
+          );
+        })}
+      </div>
+    </SectionShell>
+  );
+}