文档细节优化，search、咯阿丁和dialog组件样式修复 (#5)

* fix: loading small style, search style and dialog style

* fix: scroll to top

* fix mobile scroll

* fix scroll to top

docs/examples-dist/button.vue

@@ -23,18 +23,12 @@
   <van-col span="24">
     <van-button size="large">large</van-button>
   </van-col>
-</van-row>
-<van-row>
   <van-col span="24">
     <van-button size="normal">normal</van-button>
   </van-col>
-</van-row>
-<van-row>
   <van-col span="24">
     <van-button size="small">small</van-button>
   </van-col>
-</van-row>
-<van-row>
   <van-col span="24">
     <van-button size="mini">mini</van-button>
   </van-col>
@@ -82,9 +76,14 @@
     }
     .van-row {
       padding: 0 15px;
+      margin-bottom: 20px;
     }
-    .van-col {
-      margin-bottom: 10px;
+    .van-col-24 {
+      margin-bottom: 20px;
+
+      &:last-child {
+        margin-bottom: 0;
+      }
     }
   }
 }

docs/examples-dist/loading.vue

@@ -6,6 +6,8 @@
   <van-loading class="some-customized-class" :color="'white'"></van-loading>
 </div>
 
+
+
               </example-block><example-block title="单色spinner">
                 <van-loading class="circle-loading" :type="'circle'" :color="'white'"></van-loading>
 <van-loading class="circle-loading" :type="'circle'" :color="'black'"></van-loading>
@@ -23,10 +25,10 @@
     }
 
     .demo-loading__example--with-bg {
-      background-color: rgba(0, 0, 0, 0.5);
+      background-color: rgba(17, 17, 17, 0.7);
       margin: 0 auto;
-      width: 80px;
-      padding: 25px 0;
+      width: 120px;
+      padding: 45px 0;
       border-radius: 10px;
     }
   }

docs/examples-dist/swipe.vue

@@ -1,7 +1,9 @@
 <template><section class="demo-swipe"><h1 class="demo-title">Swipe 轮播</h1><example-block title="基础用法">
                 <van-swipe>
   <van-swipe-item v-for="img in images">
-    <img v-lazy="img" alt="">
+    <a href="https://youzan.com" target="_blank">
+      <img v-lazy="img" alt="">
+    </a>
   </van-swipe-item>
 </van-swipe>
 

docs/examples-dist/waterfall.vue

@@ -19,6 +19,7 @@
   .waterfall-item {
     line-height: 50px;
     border-bottom: 1px solid #e5e5e5;
+    background: #fff;
   }
   .page-desc {
     padding: 5px 0;