发布求购界面样式修改

src/views/market/spot_trade/components/post_buying/index.vue

@@ -4,8 +4,7 @@
           :placement="'top'"
           :visible="visible"
           @cancel="cancel"
-          width="486px"
-          height="420px">
+          class="top">
     <div class="post_buying">
       <div class="formBar">
         <a-form class="inlineForm dialogForm"