[new feature] add List component (#682)

packages/vant-css/src/index.css

@@ -4,17 +4,18 @@
 
 /* base */
 @import './base.css';
+@import './icon.css';
+@import './loading.css';
+@import './button.css';
+@import './cell.css';
 
 /* common components */
-@import './icon.css';
 @import './col.css';
 @import './row.css';
 @import './badge.css';
-@import './button.css';
-@import './cell.css';
 @import './circle.css';
 @import './collapse.css';
-@import './loading.css';
+@import './list.css';
 @import './nav-bar.css';
 @import './notice-bar.css';
 @import './popup.css';

packages/vant-css/src/list.css

@@ -0,0 +1,25 @@
+@import './common/var.css';
+
+.van-list {
+  &__loading {
+    text-align: center;
+
+    .van-loading,
+    &-text {
+      display: inline-block;
+      vertical-align: middle;
+    }
+
+    .van-loading {
+      width: 16px;
+      height: 16px;
+      margin-right: 5px;
+    }
+
+    &-text {
+      font-size: 13px;
+      color: $gray-dark;
+      line-height: 50px;
+    }
+  }
+}

packages/vant-css/src/pull-refresh.css

@@ -25,13 +25,13 @@
     .van-loading {
       width: 16px;
       height: 16px;
-      display: inline-block;
-      margin-right: 10px;
+      margin-right: 5px;
     }
 
     span,
     .van-loading {
       vertical-align: middle;
+      display: inline-block;
     }
   }