初始化

lib/pages/common/auth/widgets/login_input.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+class LoginInput extends StatelessWidget {
+  final String hintText;
+  final int maxLength;
+  final TextEditingController controller;
+  final Widget? suffix;
+
+  const LoginInput({
+    super.key,
+    required this.hintText,
+    this.maxLength = 11,
+    required this.controller,
+    this.suffix,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return TextField(
+      controller: controller,
+      maxLength: maxLength,
+      keyboardType: TextInputType.number,
+      inputFormatters: [
+        FilteringTextInputFormatter.digitsOnly, // 只允许 0-9
+      ],
+      decoration: InputDecoration(
+        hintText: hintText,
+        hintStyle: Theme.of(context).textTheme.labelLarge?.copyWith(fontSize: 16),
+        counterText: '',
+        filled: true,
+        fillColor: Theme.of(context).colorScheme.surfaceContainer,
+        border: OutlineInputBorder(
+          borderRadius: BorderRadius.circular(60),
+          borderSide: BorderSide.none, // 去掉边框
+        ),
+        isCollapsed: true,
+        contentPadding: EdgeInsets.symmetric(vertical: 14, horizontal: 20),
+        suffixIconConstraints: BoxConstraints(minWidth: 0, minHeight: 0),
+        suffixIcon: suffix != null
+            ? Container(
+                padding: EdgeInsets.only(right: 20),
+                child: suffix,
+              )
+            : null,
+      ),
+    );
+  }
+}