优化小程序登录流程，增加用户协议和隐私政策的勾选机制，确保用户主动同意后方可登录，符合审核要求。同时，增强错误处理逻辑，提升用户体验和系统稳定性。新增用户协议和隐私政策页面，更新相关样式以改善界面交互。

miniprogram/pages/read/read.wxss

@@ -830,12 +830,39 @@
   font-size: 32rpx;
 }
 
-.login-notice {
-  font-size: 22rpx;
-  color: rgba(255, 255, 255, 0.3);
+.login-agree-row {
+  display: flex;
+  flex-wrap: wrap;
+  align-items: center;
+  justify-content: center;
   margin-top: 32rpx;
-  display: block;
+  font-size: 22rpx;
+  color: rgba(255, 255, 255, 0.5);
 }
+.agree-checkbox {
+  width: 32rpx;
+  height: 32rpx;
+  border: 2rpx solid rgba(255, 255, 255, 0.5);
+  border-radius: 6rpx;
+  margin-right: 12rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 22rpx;
+  color: #fff;
+  flex-shrink: 0;
+}
+.agree-checked {
+  background: #00CED1;
+  border-color: #00CED1;
+}
+.agree-text { color: rgba(255, 255, 255, 0.6); }
+.agree-link {
+  color: #00CED1;
+  text-decoration: underline;
+  padding: 0 4rpx;
+}
+.btn-wechat-disabled { opacity: 0.6; }
 
 /* ===== 支付中加载 ===== */
 .loading-box {