fix:'pc端弹窗问题修复'

pages/user/index.vue

@@ -1,7 +1,7 @@
 <template>
   <div class="home">
     <!-- <img class="home-back" src={require('../../assets/img_home.png')} /> -->
-    <a-modal v-model="amodal" title="申请试用" on-ok="handleOk" centered @afterClose="fouse" destroyOnClose>
+    <a-modal v-model="amodal" title="申请试用" on-ok="handleOk" width="720px"  @afterClose="fouse" destroyOnClose>
       <template slot="footer">
         <div class="sub">
           <a-button key="submit" type="primary" @click="handleSubmit">