优化

Pages/mobile_login/index.wxml

@@ -3,26 +3,27 @@
     <van-image height="196rpx" src="https://gdxz-hospital.oss-cn-chengdu.aliyuncs.com/applet/doctor/static/images/logo2.png" fit="heightFix" />
   </view>
   <view class="fields">
-      <van-field
-        model:value="{{ phone }}"
-        label="+86"
-        placeholder="请输入手机号"
-        type="number"
-        input-align="left"
-      />
-      <van-field
-        model:value="{{ sms }}"
-        center
-        clearable
-        type="number"
-        label="短信验证码"
-        placeholder="请输入短信验证码"
-        use-button-slot
-      >
-        <van-button disabled="{{btn_disabled}}" color="#3CC7C0" slot="button" size="small" round plain  type="primary" bind:click="getCodePhone">
-          {{btn_msg}}
-        </van-button>
-      </van-field>
+    <van-field
+      model:value="{{ phone }}"
+      label="+86"
+      placeholder="请输入手机号"
+      type="number"
+      bind:input="phone_change"
+      input-align="left"
+    />
+    <van-field
+      model:value="{{ sms }}"
+      center
+      clearable
+      type="number"
+      label="短信验证码"
+      placeholder="请输入短信验证码"
+      use-button-slot
+    >
+      <van-button disabled="{{btn_disabled}}" color="{{btn_color}}" slot="button" size="small" round plain  type="primary" bind:click="getCodePhone">
+        {{btn_msg}}
+      </van-button>
+    </van-field>
   </view>
   <view class="btn">
     <van-button color="#3CC7C0" disabled="{{login_disabled}}" custom-style="font-size: 36rpx;margin-bottom:30rpx;" type="primary" round block bind:click="mobileLogin">登录</van-button>