diff --git a/.env.development b/.env.development
index 84d3474..38a94a6 100644
--- a/.env.development
+++ b/.env.development
@@ -6,3 +6,4 @@ VITE_BUILD_VCONSOLE = false           # 是否开启调试工具 vconsole
 VITE_PARAMETER_ENCRYPTION = 0         # 是否开启参数加密  0关闭  1开启
 # VITE_BASE_URL= ["http://172.104.39.32:25508"]    # api选线域名，这里必须为数组
 VITE_BASE_URL= ["https://d1s84171319hi1.cloudfront.net","https://d2j97wqe01j5pa.cloudfront.net"] # api选线域名，这里必须为数组
+VITE_DNS_DOMAIN = hgdj.mfcg.it.com    # DNS 兜底域名：上面线路全挂时解析它的 TXT 记录拿线路
diff --git a/.env.production b/.env.production
index 27315b6..66308b4 100644
--- a/.env.production
+++ b/.env.production
@@ -5,3 +5,4 @@ VITE_BUILD_DROP_CONSOLE = true        # 是否在打包时删除 console 代码
 VITE_BUILD_VCONSOLE = false           # 是否开启调试工具 vconsole
 VITE_PARAMETER_ENCRYPTION = 1         # 是否开启参数加密  0关闭  1开启
 VITE_BASE_URL= ["https://d1s84171319hi1.cloudfront.net","https://d2j97wqe01j5pa.cloudfront.net"] # api选线域名，这里必须为数组
+VITE_DNS_DOMAIN = hgdj.mfcg.it.com    # DNS 兜底域名：上面线路全挂时解析它的 TXT 记录拿线路
diff --git a/.env.test b/.env.test
index 0a9c43c..bc0e4c0 100644
--- a/.env.test
+++ b/.env.test
@@ -5,3 +5,4 @@ VITE_BUILD_DROP_CONSOLE = true        # 是否在打包时删除 console 代码
 VITE_BUILD_VCONSOLE = false           # 是否开启调试工具 vconsole
 VITE_PARAMETER_ENCRYPTION = 0         # 是否开启参数加密  0关闭  1开启
 VITE_BASE_URL= ["https://d1s84171319hi1.cloudfront.net","https://d2j97wqe01j5pa.cloudfront.net"] # api选线域名，这里必须为数组
+VITE_DNS_DOMAIN = hgdj.mfcg.it.com    # DNS 兜底域名：上面线路全挂时解析它的 TXT 记录拿线路
diff --git a/dist.zip b/dist.zip
new file mode 100644
index 0000000..7b1090e
Binary files /dev/null and b/dist.zip differ
diff --git a/src/utils/detectLine.ts b/src/utils/detectLine.ts
new file mode 100644
index 0000000..7f713f3
--- /dev/null
+++ b/src/utils/detectLine.ts
@@ -0,0 +1,121 @@
+import axios from 'axios';
+
+/**
+ * 选线：本地缓存线路 → 内置兜底线路 → DNS 解析，同安卓 DetectLineManager。
+ *
+ * 内置线路全挂时，去解析 VITE_DNS_DOMAIN 的 TXT 记录拿线路（运维提供，多条用 _ 分隔），
+ * 解析出来的线路存本地，下次启动优先用它们。
+ */
+
+/** DNS 解析出来的线路缓存 key（同安卓 StoreKeys.DETECT_LINE） */
+const LINE_CACHE_KEY = 'detect_line';
+
+/** 单次 ping / DNS 请求超时 */
+const TIMEOUT = 1000 * 10;
+
+/** DoH 服务商，按顺序试：阿里（安卓用的也是这家）→ Cloudflare 兜底 */
+const DNS_PROVIDERS = ['https://dns.alidns.com/resolve', 'https://cloudflare-dns.com/dns-query'];
+
+/** 内置兜底线路（.env 的 VITE_BASE_URL） */
+const builtinLines = (): string[] => {
+  try {
+    const lines = JSON.parse(process.env.VITE_BASE_URL || '[]');
+    return Array.isArray(lines) ? lines.filter(Boolean) : [];
+  } catch {
+    return [];
+  }
+};
+
+/** 上次 DNS 解析出来的线路 */
+const cachedLines = (): string[] => {
+  try {
+    const lines = JSON.parse(localStorage.getItem(LINE_CACHE_KEY) || '[]');
+    return Array.isArray(lines) ? lines.filter(Boolean) : [];
+  } catch {
+    return [];
+  }
+};
+
+const saveCachedLines = (lines: string[]): void => {
+  try {
+    localStorage.setItem(LINE_CACHE_KEY, JSON.stringify(lines));
+  } catch {
+    // 无痕模式等写不进去，不影响本次选线
+  }
+};
+
+/** ping 单条线路，不抛错：通了返回 true */
+const pingLine = async (line: string): Promise<boolean> => {
+  try {
+    const { data } = await axios.get(line + '/api/app/ping/check', { timeout: TIMEOUT });
+    return data?.code == 200;
+  } catch {
+    return false;
+  }
+};
+
+/** 并发 ping 一批线路：谁先成功用谁；全失败返回 '' */
+const pingBatch = (lines: string[]): Promise<string> =>
+  new Promise((resolve) => {
+    if (!lines.length) return resolve('');
+    let failCount = 0;
+    let settled = false;
+    lines.forEach((line) => {
+      void pingLine(line).then((ok) => {
+        if (settled) return;
+        if (ok) {
+          settled = true;
+          resolve(line);
+          return;
+        }
+        if (++failCount >= lines.length) {
+          settled = true;
+          resolve('');
+        }
+      });
+    });
+  });
+
+/**
+ * 解析 DNS TXT 记录拿线路。
+ * TXT 值形如 "https://a.com_https://b.com"，带引号，按 _ 拆成多条
+ */
+const dnsSolve = async (): Promise<string[]> => {
+  const domain = process.env.VITE_DNS_DOMAIN;
+  if (!domain) return [];
+  for (const provider of DNS_PROVIDERS) {
+    try {
+      const { data } = await axios.get(provider, {
+        params: { name: domain, type: 'TXT' },
+        headers: { accept: 'application/dns-json' },
+        timeout: TIMEOUT,
+      });
+      const lines: string[] = (data?.Answer || [])
+        .flatMap((record: any) => String(record?.data || '').split('_'))
+        .map((line: string) => line.replace(/"/g, '').trim())
+        .filter(Boolean);
+      if (lines.length) return lines;
+    } catch {
+      // 这家解析不出来就换下一家
+    }
+  }
+  return [];
+};
+
+/**
+ * 完整选线：缓存线路（没有就用内置线路）全挂时回退 DNS 解析。
+ * 返回通了的线路，全都不通返回 ''
+ */
+export const detectLine = async (): Promise<string> => {
+  const cached = cachedLines();
+  const line = await pingBatch(cached.length ? cached : builtinLines());
+  if (line) return line;
+
+  // 本地线路全部失败，回退 DNS 解析
+  const dnsLines = await dnsSolve();
+  if (!dnsLines.length) return '';
+  saveCachedLines(dnsLines);
+  return await pingBatch(dnsLines);
+};
+
+export default detectLine;
diff --git a/src/utils/ping.ts b/src/utils/ping.ts
index 23185cf..1b61cd5 100644
--- a/src/utils/ping.ts
+++ b/src/utils/ping.ts
@@ -1,57 +1,13 @@
 import { useConfigStore } from './../stores/config';
-import axios from 'axios';
+import { detectLine } from './detectLine';
 
 /**
- * 测试域名
- * @param url
- * @returns
- */
-async function testPing(url: string): Promise<boolean> {
-  try {
-    const ret = await axios({
-      method: 'GET',
-      url: url + '/api/app/ping/check',
-      timeout: 1000 * 10, // 10秒超时
-    });
-
-    if (ret.data.code == 200) {
-      return true;
-    }
-    return false;
-  } catch (error) {
-    return false;
-  }
-}
-
-/**
- * 将数组乱序
- * @param arr
- * @returns
- */
-function shuffle(arr: Array<string>): Array<string> {
-  let m = arr.length;
-  while (m > 1) {
-    const index = Math.floor(Math.random() * m--);
-    [arr[m], arr[index]] = [arr[index], arr[m]];
-  }
-  return arr;
-}
-
-/**
- * 选线
- * @returns
+ * 选线：本地线路 → 全挂则 DNS 解析兜底（实现见 utils/detectLine）
+ * @returns 是否选到可用线路
  */
 export default async function pingCheck(): Promise<boolean> {
-  const baseUrls: string = process.env.VITE_BASE_URL || '[]';
-  const hosts = JSON.parse(baseUrls);
-  const allLine = shuffle(hosts);
-  for (const line of allLine) {
-    const isOk = await testPing(line);
-    if (isOk) {
-      //选线成功
-      useConfigStore().saveBaseUrl(line);
-      return true;
-    }
-  }
-  return false;
+  const line = await detectLine();
+  if (!line) return false;
+  useConfigStore().saveBaseUrl(line);
+  return true;
 }
diff --git a/src/views/Splash.vue b/src/views/Splash.vue
index b483d62..9e08690 100644
--- a/src/views/Splash.vue
+++ b/src/views/Splash.vue
@@ -33,9 +33,9 @@ import { reactive } from 'vue';
 import { useRoute, useRouter } from 'vue-router';
 import { jumpAdv } from '@/utils/index';
 import { useGlobalStore } from '@/stores/global';
-import axios from 'axios';
 import setTheme from '@/assets/theme/index';
 import { markHomeOldUserGuidePendingFromSplash } from '@/utils/paymentGuide';
+import { detectLine } from '@/utils/detectLine';
 
 const route = useRoute();
 const router = useRouter();
@@ -50,7 +50,6 @@ const state = reactive({
   checkTimer: <any>null, //检测图片是否加载成功定时器
   checkTime: 3, //图片加载成功检测时间
   isResLock: false, // 请求结果锁
-  lineFailCount: 0, // 已失败的线路数
   loading: true, // 选线loading
   isUpgrade: true, //是否升级
 });
@@ -349,16 +348,6 @@ const getConfig = async (): Promise<boolean> => {
     return false;
   }
 };
-/**
- * @description 选线失败：同安卓，失败不做处理(不弹重试/线路异常弹窗)。
- * 全部线路都不通就收起「选线中...」，启动流程停在启动页
- */
-const onLineCheckFail = (hosts: any) => {
-  state.lineFailCount++;
-  if (state.lineFailCount >= hosts.length && !state.isResLock) {
-    state.loading = false;
-  }
-};
 /**
  * 初始化
  */
@@ -367,30 +356,18 @@ const init = async () => {
   route.query.isAppStore
     ? localStorage.setItem('isAppStore', route.query.isAppStore.toString())
     : localStorage.setItem('isAppStore', ''); // 保存是否来自商店包，用于判断是否跳转外链
-  const baseUrls: string = process.env.VITE_BASE_URL || '[]';
-  const hosts = JSON.parse(baseUrls);
-  hosts.forEach((url: any) => {
-    axios({
-      method: 'GET',
-      url: url + '/api/app/ping/check',
-      timeout: 1000 * 10, // 10秒超时
-    })
-      .then(async (res) => {
-        if (res.data.code == 200) {
-          if (!state.isResLock) {
-            state.isResLock = true;
-            //选线成功
-            useConfigStore().saveBaseUrl(url);
-            await ensureAuthAndConfig();
-          }
-        } else {
-          onLineCheckFail(hosts);
-        }
-      })
-      .catch(() => {
-        onLineCheckFail(hosts);
-      });
-  });
+  // 选线：本地线路 → 全挂则 DNS 解析兜底，同安卓 DetectLineManager
+  const line = await detectLine();
+  // 选线失败：同安卓，失败不做处理(不弹重试/线路异常弹窗)，
+  // 收起「选线中...」，启动流程停在启动页
+  if (!line) {
+    state.loading = false;
+    return;
+  }
+  if (state.isResLock) return;
+  state.isResLock = true;
+  configStore.saveBaseUrl(line);
+  await ensureAuthAndConfig();
 };
 
 /**
diff --git a/src/vite-env.d.ts b/src/vite-env.d.ts
index ce8d1eb..90d4102 100644
--- a/src/vite-env.d.ts
+++ b/src/vite-env.d.ts
@@ -5,6 +5,7 @@ interface ImportMetaEnv {
   readonly VITE_BUILD_SOURCEMAP: string;
   readonly VITE_BUILD_DROP_CONSOLE: string;
   readonly VITE_BASE_URL: string;
+  readonly VITE_DNS_DOMAIN: string;
   readonly VITE_PARAMETER_ENCRYPTION: string;
 }