diff --git a/config.js b/config.js
index 47e6b80..3d01e12 100644
--- a/config.js
+++ b/config.js
@@ -37,6 +37,37 @@ window.CURRENT_CONFIG = window.ENV[window.CURRENT_ENV];
 window.NavigationUtil = (function (window, document) {
   const blockedProtocols = /^(?:javascript|data|vbscript|mailto|tel):/i;
 
+  function inviteCodeFromUrl(url) {
+    try {
+      return String(new URL(url || window.location.href, window.location.href).searchParams.get('inviteCode') || '').trim();
+    } catch (error) {
+      return '';
+    }
+  }
+
+  function isRegisterUrl(url) {
+    try {
+      return /(?:^|\/)reg\.html$/i.test(new URL(url, window.location.href).pathname);
+    } catch (error) {
+      return false;
+    }
+  }
+
+  function withReferralInviteCode(url, inviteCode) {
+    const destination = String(url || '').trim();
+    if (!destination || !isRegisterUrl(destination)) return destination;
+    const code = String(inviteCode || inviteCodeFromUrl(window.location.href)).trim();
+    if (!code) return destination;
+    const target = new URL(destination, window.location.href);
+    if (!target.searchParams.get('inviteCode')) target.searchParams.set('inviteCode', code);
+    return target.href;
+  }
+
+  function referralRegisterUrl(referralUrl, inviteCode) {
+    const code = String(inviteCode || inviteCodeFromUrl(referralUrl)).trim();
+    return code ? withReferralInviteCode('reg.html', code) : '';
+  }
+
   function shouldOpenInNewTab(anchor) {
     const href = (anchor.getAttribute('href') || '').trim();
 
@@ -49,6 +80,10 @@ window.NavigationUtil = (function (window, document) {
       return;
     }
 
+    const href = anchor.getAttribute('href') || '';
+    const referralHref = withReferralInviteCode(href);
+    if (referralHref !== href) anchor.setAttribute('href', referralHref);
+
     if (anchor.target !== '_blank') {
       anchor.target = '_blank';
     }
@@ -100,7 +135,7 @@ window.NavigationUtil = (function (window, document) {
 
   return {
     open(url) {
-      const destination = String(url || '').trim();
+      const destination = withReferralInviteCode(url);
 
       if (!destination) {
         return null;
@@ -113,6 +148,9 @@ window.NavigationUtil = (function (window, document) {
       }
 
       return openedWindow;
-    }
+    },
+
+    withReferralInviteCode,
+    referralRegisterUrl
   };
 })(window, document);
diff --git a/html/fenxiao.html b/html/fenxiao.html
index 222c8d6..4c3a066 100644
--- a/html/fenxiao.html
+++ b/html/fenxiao.html
@@ -114,21 +114,6 @@
           <button class="action-card-btn btn-apply-dist" id="fzlj" type="button">复制链接</button>
           <button class="action-card-btn btn-apply-expert" id="tgewm" type="button">推广二维码</button>
         </div>
-        <div class="action-card">
-          <div class="action-card-title">
-            <i class="layui-icon layui-icon-group"></i> 申请分销
-          </div>
-          <div class="action-card-desc">
-            成为分销商，推广赚佣金。邀请好友注册即可获得分销收益，多级返佣，轻松赚钱。
-          </div>
-          <button
-            class="action-card-btn btn-apply-dist"
-            id="btnApplyDist"
-            onclick="applyDistribution()"
-          >
-            申请分销
-          </button>
-        </div>
         <div class="action-card">
           <div class="action-card-title">
             <i class="layui-icon layui-icon-star"></i> 申请专家
@@ -277,15 +262,12 @@
             : $("#backTop").removeClass("is-visible");
         });
 
-        function getApiBaseUrl() {
-          return (ApiClient.baseUrl || (window.CONFIG && CONFIG.API_BASE_URL) || window.location.origin || "").replace(/\/$/, "");
-        }
-
         function normalizeShareLink(data) {
           var affUrl = (data && (data.affUrl || data.shareUrl || data.inviteUrl || data.url)) || "";
-          if (!affUrl) return "";
-          if (/^https?:\/\//i.test(affUrl)) return affUrl;
-          return getApiBaseUrl() + "/html/reg.html?affUrl=" + String(affUrl).replace(/^\//, "");
+          return NavigationUtil.referralRegisterUrl(
+            String(affUrl).trim(),
+            data && data.inviteCode,
+          );
         }
 
         function getAffInfo() {
@@ -333,9 +315,6 @@
               .then(function (res) {
                 if (res.code !== 0 || !res.data) throw new Error(res.msg || "获取推广信息失败");
                 var shareLink = normalizeShareLink(res.data);
-                if (res.data.affCodeUrl && res.data.affUrl) {
-                  shareLink = String(res.data.affCodeUrl).replace(/\/$/, "") + "/" + String(res.data.affUrl).replace(/^\//, "");
-                }
                 if (!shareLink) throw new Error("接口未返回推广二维码链接");
                 createCustomModal(shareLink);
               })
@@ -431,40 +410,6 @@
           );
         }
 
-        // Apply for distribution
-        window.applyDistribution = function () {
-          CommonUtil.requireAuth(function () {
-            layer.confirm(
-              "确定要申请成为分销商吗？",
-              {
-                title: "申请分销",
-                btn: ["确定申请", "取消"],
-                btnAlign: "c",
-              },
-              function (index) {
-                layer.close(index);
-                ApiClient.post(ApiClient.API.referralBind, {}, { headers: CommonUtil.authHeaders() })
-                  .then(function (res) {
-                    if (res.code === 0) {
-                      layer.msg(
-                        "申请成功！",
-                        { icon: 1, time: 2000 },
-                        function () {
-                          loadUserDetail();
-                        },
-                      );
-                    } else {
-                      layer.msg(res.msg || "申请失败", { icon: 2 });
-                    }
-                  })
-                  .catch(function (err) {
-                    layer.msg("网络错误，请稍后重试", { icon: 2 });
-                  });
-              },
-            );
-          });
-        };
-
         // Apply for expert
         window.applyExpert = function () {
           CommonUtil.requireAuth(function () {
diff --git a/html/login.html b/html/login.html
index d8b8579..da97690 100644
--- a/html/login.html
+++ b/html/login.html
@@ -51,7 +51,7 @@
               <div class="error-message" id="passwordError"></div>
             </div>
 
-            <div class="form-group" id="captchaGroup">
+            <div class="form-group" id="captchaGroup" style="display: none">
               <label for="captchaInput">验证码</label>
               <div class="captcha-row">
                 <input
@@ -119,6 +119,7 @@
       let layerInstance = null;
       let currentCaptchaId = "";
       let currentVerifyType = "captcha";
+      let currentSlideToken = "";
       let currentSlideUuid = "";
       let currentSlideX = 0;
 
@@ -147,6 +148,7 @@
       }
 
       function refreshCaptcha() {
+        $("#captchaGroup").show();
         currentCaptchaId = "";
         currentSlideUuid = "";
         currentSlideX = 0;
@@ -191,11 +193,13 @@
       function completeSlideCaptcha(result) {
         const data = result || {};
         const nested = data.data || {};
+        currentSlideToken =
+          data.slideToken || data.token || nested.slideToken || nested.token || "";
         currentSlideUuid =
           data.slideUuid || data.uuid || nested.slideUuid || nested.uuid || "";
         currentSlideX =
           Number(data.slideX || data.x || nested.slideX || nested.x || 0) || 0;
-        if (!currentSlideUuid) {
+        if (!currentSlideToken && !currentSlideUuid) {
           layerInstance.msg("滑动验证未返回凭证，请重试", { icon: 2 });
           renderSlideCaptchaEntry();
           return;
@@ -216,6 +220,7 @@
               headers: ApiClient.publicHeaders(),
               onSuccess: completeSlideCaptcha,
               onCancel: function () {
+                currentSlideToken = "";
                 currentSlideUuid = "";
                 currentSlideX = 0;
               },
@@ -276,12 +281,13 @@
 
       function getVerifyParams(show) {
         if (currentVerifyType === "slide") {
-          if (!currentSlideUuid) {
+          if (!currentSlideToken && !currentSlideUuid) {
             if (show) layerInstance.msg("请先完成滑动验证", { icon: 2 });
             return null;
           }
           return {
             verifyType: "slide",
+            slideToken: currentSlideToken,
             slideUuid: currentSlideUuid,
             slideX: currentSlideX,
           };
@@ -319,12 +325,6 @@
         NavigationUtil.open(getLoginRedirectUrl());
       }
 
-      function bindReferralThenRedirect() {
-        AuthPageUtil.bindPendingReferralInviteCode()
-          .then(redirectAfterLogin)
-          .catch(redirectAfterLogin);
-      }
-
       function submitLogin() {
         const payload = Object.assign(
           {
@@ -351,7 +351,7 @@
               layerInstance.msg(
                 "登录成功，即将跳转到首页",
                 { icon: 1, time: 1200 },
-                bindReferralThenRedirect,
+                redirectAfterLogin,
               );
               return;
             }
@@ -376,7 +376,6 @@
 
       layui.use(["layer", "jquery"], function () {
         layerInstance = layui.layer;
-        AuthPageUtil.captureReferralInviteFromUrl();
         loadVerifyConfig().then(refreshCaptcha);
         $("#loginForm").on("submit", function (event) {
           event.preventDefault();
diff --git a/html/reg.html b/html/reg.html
index 4ededcb..014ffba 100644
--- a/html/reg.html
+++ b/html/reg.html
@@ -49,7 +49,7 @@
               <div class="error-message" id="phoneError"></div>
             </div>
 
-            <div class="form-group" id="captchaGroup">
+            <div class="form-group" id="captchaGroup" style="visibility: hidden">
               <label for="captchaInput">滑动验证</label>
               <div class="captcha-row">
                 <input
@@ -146,6 +146,7 @@
       let layerInstance = null;
       let currentCaptchaId = "";
       let currentVerifyType = "captcha";
+      let currentSlideToken = "";
       let currentSlideUuid = "";
       let currentSlideX = 0;
       let pendingSmsAfterVerify = false;
@@ -176,6 +177,7 @@
       }
 
       function refreshCaptcha() {
+        $("#captchaGroup").css("visibility", "visible");
         if (currentVerifyType === "none") {
           currentCaptchaId = "";
           currentSlideUuid = "";
@@ -194,8 +196,10 @@
         $("#captchaGroup").removeClass("is-slide-mode");
         if (currentVerifyType === "slide") {
           renderSlideCaptchaEntry();
+          $("#captchaGroup").hide();
           return;
         }
+        $("#captchaGroup").show();
         $("#captchaInput").show();
         $("#captchaRefreshLink").show().text("看不清？换一张");
         $("#captchaContainer")
@@ -227,11 +231,13 @@
       function completeSlideCaptcha(result) {
         const data = result || {};
         const nested = data.data || {};
+        currentSlideToken =
+          data.slideToken || data.token || nested.slideToken || nested.token || "";
         currentSlideUuid =
           data.slideUuid || data.uuid || nested.slideUuid || nested.uuid || "";
         currentSlideX =
           Number(data.slideX || data.x || nested.slideX || nested.x || 0) || 0;
-        if (!currentSlideUuid) {
+        if (!currentSlideToken && !currentSlideUuid) {
           layerInstance.msg("滑动验证未返回凭证，请重试", { icon: 2 });
           renderSlideCaptchaEntry();
           return;
@@ -257,6 +263,7 @@
               headers: ApiClient.publicHeaders(),
               onSuccess: completeSlideCaptcha,
               onCancel: function () {
+                currentSlideToken = "";
                 currentSlideUuid = "";
                 currentSlideX = 0;
               },
@@ -359,8 +366,11 @@
       function handlePhoneInput() {
         const phone = $("#phone").val().trim();
         if (smsCodeIssuedPhone && smsCodeIssuedPhone !== phone) {
+          smsCodeIssuedPhone = "";
           $("#smsCode").val("");
           clearError("smsCode");
+          $("#captchaGroup").show();
+          refreshCaptcha();
         }
       }
 
@@ -375,9 +385,10 @@
 
       function getOptionalGraphVerifyParams() {
         if (hasIssuedSmsCodeForCurrentPhone()) return {};
-        if (currentVerifyType === "slide" && currentSlideUuid) {
+        if (currentVerifyType === "slide" && (currentSlideToken || currentSlideUuid)) {
           return {
             verifyType: "slide",
+            slideToken: currentSlideToken,
             slideUuid: currentSlideUuid,
             slideX: currentSlideX,
           };
@@ -393,7 +404,7 @@
 
       function getGraphVerifyParams(show) {
         if (currentVerifyType === "slide") {
-          if (!currentSlideUuid) {
+          if (!currentSlideToken && !currentSlideUuid) {
             if (show) {
               layerInstance.msg("请先完成滑动验证后获取短信验证码", {
                 icon: 2,
@@ -403,6 +414,7 @@
           }
           return {
             verifyType: "slide",
+            slideToken: currentSlideToken,
             slideUuid: currentSlideUuid,
             slideX: currentSlideX,
           };
@@ -558,7 +570,7 @@
       function sendSmsCode() {
         if (!validatePhone(true)) return;
 
-        if (currentVerifyType === "slide" && !currentSlideUuid) {
+        if (currentVerifyType === "slide" && !currentSlideToken && !currentSlideUuid) {
           pendingSmsAfterVerify = true;
           openSlideCaptcha();
           return;
@@ -593,6 +605,7 @@
             .then(function (res) {
               if (ApiClient.isSuccess(res)) {
                 smsCodeIssuedPhone = $("#phone").val().trim();
+                $("#captchaGroup").hide();
                 layerInstance.msg("短信验证码已发送", { icon: 1 });
                 AuthPageUtil.startSmsCountdown("#sendSmsBtn");
                 return;
@@ -629,7 +642,7 @@
       }
 
       function buildRegisterData() {
-        return Object.assign(
+        const registerData = Object.assign(
           {
             phoneNumber: $("#phone").val().trim(),
             password: hex_md5($("#password").val()),
@@ -638,6 +651,9 @@
           },
           getOptionalGraphVerifyParams(),
         );
+        const inviteCode = AuthPageUtil.getReferralInviteCodeFromUrl();
+        if (inviteCode) registerData.inviteCode = inviteCode;
+        return registerData;
       }
 
       function saveRegisterTokenIfPresent(res) {
@@ -673,13 +689,7 @@
           hasToken ? "注册成功，即将跳转到首页" : "注册成功，即将前往登录",
           { icon: 1, time: 1200 },
           function () {
-            AuthPageUtil.bindPendingReferralInviteCode()
-              .then(function () {
-                redirectAfterRegister(hasToken);
-              })
-              .catch(function () {
-                redirectAfterRegister(hasToken);
-              });
+            redirectAfterRegister(hasToken);
           },
         );
       }
@@ -710,7 +720,6 @@
 
       layui.use(["layer", "jquery"], function () {
         layerInstance = layui.layer;
-        AuthPageUtil.captureReferralInviteFromUrl();
         loadVerifyConfig().then(refreshCaptcha);
         $("#sendSmsBtn").on("click", sendSmsCode);
         $("#registerForm").on("submit", function (event) {
diff --git a/html/repwd.html b/html/repwd.html
index 9d497e7..a57f081 100644
--- a/html/repwd.html
+++ b/html/repwd.html
@@ -37,7 +37,7 @@
               <div class="error-message" id="phoneError"></div>
             </div>
 
-            <div class="form-group" id="captchaGroup">
+            <div class="form-group" id="captchaGroup" style="visibility: hidden">
               <label for="captchaInput">滑动验证</label>
               <div class="captcha-row">
                 <input
@@ -127,6 +127,7 @@
       let layerInstance = null;
       let currentCaptchaId = "";
       let currentVerifyType = "captcha";
+      let currentSlideToken = "";
       let currentSlideUuid = "";
       let currentSlideX = 0;
       let pendingSmsAfterVerify = false;
@@ -157,6 +158,7 @@
       }
 
       function refreshCaptcha() {
+        $("#captchaGroup").css("visibility", "visible");
         currentCaptchaId = "";
         currentSlideUuid = "";
         currentSlideX = 0;
@@ -199,11 +201,13 @@
       function completeSlideCaptcha(result) {
         const data = result || {};
         const nested = data.data || {};
+        currentSlideToken =
+          data.slideToken || data.token || nested.slideToken || nested.token || "";
         currentSlideUuid =
           data.slideUuid || data.uuid || nested.slideUuid || nested.uuid || "";
         currentSlideX =
           Number(data.slideX || data.x || nested.slideX || nested.x || 0) || 0;
-        if (!currentSlideUuid) {
+        if (!currentSlideToken && !currentSlideUuid) {
           layerInstance.msg("滑动验证未返回凭证，请重试", { icon: 2 });
           renderSlideCaptchaEntry();
           return;
@@ -229,6 +233,7 @@
               headers: ApiClient.publicHeaders(),
               onSuccess: completeSlideCaptcha,
               onCancel: function () {
+                currentSlideToken = "";
                 currentSlideUuid = "";
                 currentSlideX = 0;
               },
@@ -332,12 +337,13 @@
 
       function getVerifyParams(show) {
         if (currentVerifyType === "slide") {
-          if (!currentSlideUuid) {
+          if (!currentSlideToken && !currentSlideUuid) {
             if (show) layerInstance.msg("请先完成滑动验证", { icon: 2 });
             return null;
           }
           return {
             verifyType: "slide",
+            slideToken: currentSlideToken,
             slideUuid: currentSlideUuid,
             slideX: currentSlideX,
           };
@@ -447,7 +453,7 @@
 
       function sendSmsCode() {
         if (!validatePhone(true)) return;
-        if (currentVerifyType === "slide" && !currentSlideUuid) {
+        if (currentVerifyType === "slide" && !currentSlideToken && !currentSlideUuid) {
           pendingSmsAfterVerify = true;
           openSlideCaptcha();
           return;
diff --git a/html/tuiguang.html b/html/tuiguang.html
index 345ff5c..a4a9244 100644
--- a/html/tuiguang.html
+++ b/html/tuiguang.html
@@ -486,33 +486,14 @@
         );
       }
 
-      function fullShareLink(url, code) {
-        if (url && /^https?:\/\//.test(url)) return url;
-        if (url) {
-          if (url.indexOf("/html/reg.html") >= 0) {
-            return ApiClient.baseUrl.replace(/\/$/, "") + "/" + url.replace(/^\//, "");
-          }
-          return (
-            ApiClient.baseUrl.replace(/\/$/, "") +
-            "/html/reg.html?affUrl=" +
-            encodeURIComponent(url.replace(/^\//, ""))
-          );
-        }
-        return (
-          location.origin +
-          "/html/reg.html" +
-          (code ? "?inviteCode=" + encodeURIComponent(code) : "")
-        );
-      }
-
       // Load promotion info (link + QR code)
       function loadPromoInfo() {
         ApiClient.get(ApiClient.API.referralShareInfo)
           .then(function (res) {
             if (isSuccess(res)) {
               var data = pickData(res, {}) || {};
-              // Build share link
-              var shareLink = fullShareLink(
+              // 推广链接由接口完整返回，前端仅展示和生成二维码。
+              var shareLink = String(
                 firstDefined(
                   data.affUrl,
                   data.shareUrl,
@@ -521,14 +502,14 @@
                   data.promoteUrl,
                   data.referralUrl,
                   data.url,
-                ),
-                firstDefined(
-                  data.inviteCode,
-                  data.referralCode,
-                  data.affCode,
-                  data.code,
-                ),
+                  "",
+                ) || "",
+              ).trim();
+              shareLink = NavigationUtil.referralRegisterUrl(
+                shareLink,
+                firstDefined(data.inviteCode, data.referralCode, data.affCode, data.code, ""),
               );
+              if (!shareLink) throw new Error("接口未返回有效邀请码");
               $("#promoLink").val(shareLink);
 
               // Generate QR code
diff --git a/html/usercenter.html b/html/usercenter.html
index 8b9cc75..d47b1dd 100644
--- a/html/usercenter.html
+++ b/html/usercenter.html
@@ -109,6 +109,13 @@
           <button class="uc-btn uc-btn-edit" onclick="openEditProfile()">
             编辑资料
           </button>
+          <button
+            class="uc-btn uc-btn-edit"
+            id="referralBindButton"
+            onclick="openReferralBindPrompt()"
+          >
+            绑定邀请码
+          </button>
           <button
             class="uc-btn uc-btn-expert"
             id="expertApplyBtn"
@@ -820,6 +827,45 @@
           });
       }
 
+      function bindReferralInviteCode(inviteCode) {
+        var $button = $("#referralBindButton");
+        $button.prop("disabled", true).text("绑定中...");
+        ApiClient.post(ApiClient.API.referralBind, { inviteCode: inviteCode })
+          .then(function (res) {
+            if (!ApiClient.isSuccess(res)) {
+              throw new Error((res && res.msg) || "邀请码绑定失败");
+            }
+            $button.text("已绑定");
+            layui.layer.msg("邀请码绑定成功", { icon: 1 });
+          })
+          .catch(function (error) {
+            $button.prop("disabled", false).text("绑定邀请码");
+            layui.layer.msg(error.message || "邀请码绑定失败，请稍后重试", { icon: 2 });
+          });
+      }
+
+      function openReferralBindPrompt() {
+        layui.layer.prompt(
+          { title: "请输入邀请人的邀请码", formType: 0, btn: ["下一步", "取消"] },
+          function (value, promptIndex) {
+            var inviteCode = String(value || "").trim();
+            if (!inviteCode) {
+              layui.layer.msg("请输入邀请码", { icon: 2 });
+              return;
+            }
+            layui.layer.close(promptIndex);
+            layui.layer.confirm(
+              "每个账号只能绑定一个邀请人，绑定后不能更换。确认继续吗？",
+              { title: "确认绑定", btn: ["确认绑定", "取消"] },
+              function (confirmIndex) {
+                layui.layer.close(confirmIndex);
+                bindReferralInviteCode(inviteCode);
+              },
+            );
+          },
+        );
+      }
+
       // ====== Sign-in Records ======
       function loadSignInRecords(pageNum) {
         signInPageNum = pageNum || 1;
diff --git a/tmp/referral-register-contract-test.js b/tmp/referral-register-contract-test.js
new file mode 100644
index 0000000..4dcafa9
--- /dev/null
+++ b/tmp/referral-register-contract-test.js
@@ -0,0 +1,68 @@
+const assert = require("assert");
+const fs = require("fs");
+const path = require("path");
+const vm = require("vm");
+
+const root = path.resolve(__dirname, "..");
+const authSource = fs.readFileSync(path.join(root, "utils", "AuthPageUtil.js"), "utf8");
+const configSource = fs.readFileSync(path.join(root, "config.js"), "utf8");
+const login = fs.readFileSync(path.join(root, "html", "login.html"), "utf8");
+const register = fs.readFileSync(path.join(root, "html", "reg.html"), "utf8");
+const usercenter = fs.readFileSync(path.join(root, "html", "usercenter.html"), "utf8");
+const promo = fs.readFileSync(path.join(root, "html", "tuiguang.html"), "utf8");
+const distribution = fs.readFileSync(path.join(root, "html", "fenxiao.html"), "utf8");
+const resetPassword = fs.readFileSync(path.join(root, "html", "repwd.html"), "utf8");
+
+[login, register, resetPassword].forEach(function (page) {
+  Array.from(page.matchAll(/<script(?:\s[^>]*)?>([\s\S]*?)<\/script>/gi), function (match) {
+    return match[1];
+  }).filter(Boolean).forEach(function (source) {
+    new Function(source);
+  });
+});
+
+const context = { URLSearchParams, window: { location: { search: "?inviteCode=invite-001" } } };
+vm.runInNewContext(`${authSource}\nthis.AuthPageUtilForTest = AuthPageUtil;`, context);
+
+assert.strictEqual(context.AuthPageUtilForTest.getReferralInviteCodeFromUrl(), "invite-001");
+assert.strictEqual(context.AuthPageUtilForTest.getReferralInviteCodeFromUrl("?referralCode=legacy"), "");
+assert(register.includes("registerData.inviteCode = inviteCode"), "registration must send a non-empty inviteCode");
+assert(register.includes('$("#captchaGroup").hide();'), "registration verification must hide after SMS is sent");
+assert(register.includes('$("#captchaGroup").show();'), "registration verification must return after the phone changes");
+assert(/currentVerifyType === "slide"[\s\S]*?renderSlideCaptchaEntry\(\);[\s\S]*?#captchaGroup"\)\.hide\(\)/.test(register), "slide mode must not render an inline verification row");
+assert(!login.includes("bindPendingReferralInviteCode"), "login must not bind referrals automatically");
+assert(!register.includes("bindPendingReferralInviteCode"), "registration success must not issue a second bind request");
+assert(usercenter.includes("ApiClient.API.referralBind, { inviteCode: inviteCode }"), "user center must provide manual binding");
+assert(promo.includes("NavigationUtil.referralRegisterUrl"), "promotion page must normalize returned links to registration");
+assert(login.includes('id="captchaGroup" style="display: none"'));
+assert(login.includes('$("#captchaGroup").show();'));
+[register, resetPassword].forEach(function (page) {
+  assert(page.includes('id="captchaGroup" style="visibility: hidden"'));
+  assert(page.includes('$("#captchaGroup").css("visibility", "visible");'));
+});
+
+const configContext = {
+  URL,
+  MutationObserver: function () {},
+  location: { hostname: "example.com", port: "", href: "https://example.com/html/index.html?inviteCode=invite-001" },
+  document: { readyState: "loading", addEventListener() {} },
+  window: { location: { href: "https://example.com/html/index.html?inviteCode=invite-001" }, open() { return null; } },
+};
+vm.runInNewContext(configSource, configContext);
+assert.strictEqual(
+  configContext.window.NavigationUtil.referralRegisterUrl("https://example.com/app?inviteCode=invite-001"),
+  "https://example.com/html/reg.html?inviteCode=invite-001",
+);
+assert(!distribution.includes("applyDistribution"), "the obsolete empty bind entry must be removed");
+
+context.ApiClient = {
+  API: { authVerifyConfig: "/api/web/auth/verify-config" },
+  get() { return Promise.reject(new Error("network unavailable")); },
+};
+context.AuthPageUtilForTest.loadVerifyType().then(function (type) {
+  assert.strictEqual(type, "slide", "verify-config failure must not show image captcha");
+  console.log("referral register contract checks passed");
+}).catch(function (error) {
+  console.error(error);
+  process.exitCode = 1;
+});
diff --git a/utils/ApiClient.js b/utils/ApiClient.js
index 06dba34..30fa803 100644
--- a/utils/ApiClient.js
+++ b/utils/ApiClient.js
@@ -44,7 +44,6 @@ const ApiClient = {
     referralSummary: '/api/web/referral/summary',
     referralInviteList: '/api/web/referral/invite-list',
     referralRebateList: '/api/web/referral/rebate-list',
-    referralBindPreview: '/api/web/referral/bind-preview',
     referralBind: '/api/web/referral/bind',
     accountInfo: '/api/web/account/info',
     accountProfile: '/api/web/account/profile',
@@ -610,7 +609,6 @@ const ApiClient = {
       '/api/web/rebate/withdraw': { url: '/api/web/wallet/withdraw', method: 'POST', data },
       '/api/web/rebate/rebateToBalance': { url: '/api/web/wallet/transfer-to-account', method: 'POST', data },
       '/api/web/distribution/getPageList': { url: '/api/web/referral/invite-list', method: 'GET', data: pageParams },
-      '/api/web/user/applyDistribution': { url: '/api/web/referral/bind', method: 'POST', data },
       '/api/web/user/applyExpert': { url: '/api/web/expert/apply', method: 'POST', data },
       '/api/web/user/expert/apply': { url: '/api/web/expert/apply', method: 'POST', data },
       '/api/web/user/updateInfo': { url: '/api/web/account/profile', method: 'PUT', data },
diff --git a/utils/AuthPageUtil.js b/utils/AuthPageUtil.js
index 2a17a43..ce1446c 100644
--- a/utils/AuthPageUtil.js
+++ b/utils/AuthPageUtil.js
@@ -4,14 +4,6 @@ const AuthPageUtil = {
   slideX: 0,
   slideToken: '',
   slideCaptchaViewportCleanup: null,
-  referralInviteSessionKey: 'pendingReferralInviteCode',
-
-  getSessionStorage() {
-    if (typeof sessionStorage !== 'undefined') return sessionStorage;
-    if (typeof window !== 'undefined' && window.sessionStorage) return window.sessionStorage;
-    return null;
-  },
-
   normalizeReferralInviteCode(inviteCode) {
     return String(inviteCode || '').trim();
   },
@@ -31,82 +23,13 @@ const AuthPageUtil = {
     try {
       const params = new Params(query || '');
       return this.normalizeReferralInviteCode(
-        params.get('inviteCode') || params.get('referralCode') || '',
+        params.get('inviteCode') || '',
       );
     } catch (error) {
       return '';
     }
   },
 
-  setPendingReferralInviteCode(inviteCode) {
-    const code = this.normalizeReferralInviteCode(inviteCode);
-    const storage = this.getSessionStorage();
-
-    if (code && storage) {
-      storage.setItem(this.referralInviteSessionKey, code);
-    }
-
-    return code;
-  },
-
-  getPendingReferralInviteCode() {
-    const storage = this.getSessionStorage();
-    if (!storage) return '';
-    return this.normalizeReferralInviteCode(storage.getItem(this.referralInviteSessionKey));
-  },
-
-  clearPendingReferralInviteCode() {
-    const storage = this.getSessionStorage();
-    if (storage) storage.removeItem(this.referralInviteSessionKey);
-  },
-
-  captureReferralInviteFromUrl(search) {
-    const code = this.getReferralInviteCodeFromUrl(search);
-
-    if (code) {
-      this.setPendingReferralInviteCode(code);
-    }
-
-    return code;
-  },
-
-  bindPendingReferralInviteCode() {
-    const inviteCode = this.getPendingReferralInviteCode();
-
-    if (!inviteCode) {
-      return Promise.resolve({ skipped: true, reason: 'empty' });
-    }
-
-    if (
-      typeof ApiClient === 'undefined' ||
-      !ApiClient.API ||
-      !ApiClient.API.referralBind ||
-      typeof ApiClient.post !== 'function'
-    ) {
-      return Promise.resolve({ skipped: true, reason: 'missing-api' });
-    }
-
-    if (typeof ApiClient.token === 'function' && !ApiClient.token()) {
-      return Promise.resolve({ skipped: true, reason: 'unauthenticated' });
-    }
-
-    return ApiClient.post(ApiClient.API.referralBind, { inviteCode })
-      .then((res) => {
-        const isSuccess =
-          typeof ApiClient.isSuccess === 'function'
-            ? ApiClient.isSuccess(res)
-            : !!(res && (res.success === true || Number(res.code) === 0 || Number(res.code) === 200));
-
-        if (isSuccess) {
-          this.clearPendingReferralInviteCode();
-          return { skipped: false, success: true, res };
-        }
-
-        return { skipped: false, success: false, res };
-      })
-      .catch((error) => ({ skipped: false, success: false, error }));
-  },
-
   isPhone(phone) {
     return /^1[3-9]\d{9}$/.test(String(phone || '').trim());
   },
@@ -133,7 +56,7 @@ const AuthPageUtil = {
         }
         return 'captcha';
       })
-      .catch(() => 'captcha');
+      .catch(() => 'slide');
   },
 
   buildSmsParams(options = {}) {