fix(miniprogram): 登录页尺寸过大 + 排除关怀模式

- 正常模式大幅缩减：标题 48→32px、按钮高 96→56px、按钮字 32→28px
  logo 128→96px、副标题 26→16px、顶部留白 160→100px
- 登录页不应用 elder-mode class（正常模式已足够大）
- 关怀模式覆写值同步调整：标题 38px、按钮高 64px、副标题 21px

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/miniprogram/src/pages/login/index.scss

@@ -11,7 +11,7 @@
   display: flex;
   flex-direction: column;
   align-items: center;
-  padding: 160px 56px 80px;
+  padding: 100px 40px 60px;
 }
 
 /* ─── 品牌区 ─── */
@@ -19,22 +19,22 @@
   display: flex;
   flex-direction: column;
   align-items: center;
-  margin-bottom: 80px;
+  margin-bottom: 48px;
 }
 
 .login-logo {
-  width: 128px;
+  width: 96px;
-  height: 128px;
+  height: 96px;
   border-radius: $r-lg;
   background: $pri;
   @include flex-center;
-  margin-bottom: 36px;
+  margin-bottom: 24px;
   box-shadow: 0 8px 24px rgba($pri, 0.3);
 }
 
 .login-logo-mark {
   font-family: 'Georgia', 'Times New Roman', serif;
-  font-size: 64px;
+  font-size: 48px;
   color: #fff;
   font-weight: bold;
   line-height: 1;
@@ -42,14 +42,14 @@
 
 .login-title {
   font-family: 'Georgia', 'Times New Roman', serif;
-  font-size: 48px;
+  font-size: 32px;
   color: $tx;
   font-weight: bold;
-  margin-bottom: 12px;
+  margin-bottom: 8px;
 }
 
 .login-subtitle {
-  font-size: 26px;
+  font-size: 16px;
   color: $tx2;
   letter-spacing: 0.05em;
 }
@@ -57,7 +57,7 @@
 /* ─── 装饰线 ─── */
 .login-divider {
   width: 48px;
-  margin-bottom: 64px;
+  margin-bottom: 40px;
 }
 
 .login-divider-line {
@@ -74,16 +74,18 @@
 
 .login-btn {
   width: 100%;
-  height: 96px;
+  height: $btn-primary-h;
   background: $pri;
   color: #fff;
-  font-size: 32px;
+  font-size: 28px;
   font-weight: 600;
   border-radius: $r;
   border: none;
   @include flex-center;
   letter-spacing: 0.04em;
   box-shadow: 0 4px 16px rgba($pri, 0.25);
+  padding: 0;
+  line-height: 1;
 
   &::after {
     border: none;
@@ -98,14 +100,14 @@
 .agreement-row {
   display: flex;
   align-items: flex-start;
-  margin-top: 40px;
+  margin-top: 28px;
-  gap: 12px;
+  gap: 10px;
   width: 100%;
 }
 
 .agreement-check {
-  width: 32px;
+  width: 28px;
-  height: 32px;
+  height: 28px;
   border: 2px solid $bd;
   border-radius: $r-sm;
   @include flex-center;
@@ -120,14 +122,14 @@
 }
 
 .agreement-check-mark {
-  font-size: 22px;
+  font-size: 18px;
   color: #fff;
   font-weight: bold;
   line-height: 1;
 }
 
 .agreement-text {
-  font-size: 22px;
+  font-size: 14px;
   color: $tx2;
   line-height: 1.7;
 }
@@ -141,11 +143,11 @@
 .skip-row {
   width: 100%;
   text-align: center;
-  margin-top: 32px;
+  margin-top: 24px;
 }
 
 .skip-btn {
-  font-size: 20px;
+  font-size: 16px;
   color: $tx3;
   padding: 8px 16px;
 }

apps/miniprogram/src/pages/login/index.tsx

@@ -11,6 +11,9 @@ export default function Login() {
   const [agreed, setAgreed] = useState(false);
   const { login, bindPhone, loading, isMedicalStaff } = useAuthStore();
 
+  // 登录页不应用关怀模式（正常模式尺寸已足够大）
+  const loginClass = '';
+
   const navigateAfterLogin = () => {
     if (isMedicalStaff()) {
       Taro.redirectTo({ url: '/pages/doctor/index' });
@@ -58,7 +61,7 @@ export default function Login() {
   };
 
   return (
-    <ScrollView scrollY className={`login-scroll ${modeClass}`}>
+    <ScrollView scrollY className={`login-scroll ${loginClass}`}>
       <View className='login-page'>
         {/* 品牌区 */}
         <View className='login-brand'>

apps/miniprogram/src/styles/elder-mode.scss

@@ -305,22 +305,48 @@
   // 登录页
   // ═══════════════════════════════════════
 
+  .login-page {
+    padding: 80px 48px 60px;
+  }
+
+  .login-brand {
+    margin-bottom: 56px;
+  }
+
+  .login-logo {
+    width: 112px;
+    height: 112px;
+  }
+
+  .login-logo-mark {
+    font-size: 56px;
+  }
+
   .login-title {
-    font-size: 56px; // 48 × 1.17 标题微增
+    font-size: 38px; // 32 × 1.19 标题微增
   }
 
   .login-subtitle {
-    font-size: 30px; // 26 × 1.15
+    font-size: 21px; // 16 × 1.31
   }
 
   .login-btn {
-    height: 96px;
+    height: 64px;
-    font-size: 34px; // 32 × 1.06
+    font-size: 30px; // 28 × 1.07
+  }
+
+  .agreement-text {
+    font-size: 18px; // 14 × 1.29
+  }
+
+  .agreement-check {
+    width: 34px;
+    height: 34px;
   }
 
   .skip-btn {
-    font-size: 24px; // 20 × 1.2
+    font-size: 20px; // 16 × 1.25
-    height: 60px;
+    height: 48px;
   }
 
   // ═══════════════════════════════════════