style: resolve style conflicts.

Author: jaywcjlove

src/components/TextArea/index.less

@@ -48,8 +48,15 @@
     }
     &-pre {
       position: relative;
-      margin: 0px;
+      margin: 0px !important;
       pointer-events: none;
+      background-color: transparent !important;
+      > code {
+        padding: 0 !important;
+        font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif !important;
+        font-size: 14px !important;
+        line-height: 18px !important;
+      }
     }
     &-input {
       position: absolute;

src/index.less

@@ -32,6 +32,9 @@
     top: 0;
     right: 0;
     bottom: 0;
+    border-radius: 0 0 5px 0;
+    display: flex;
+    flex-direction: column;
     .anchor {
       display: none;
     }