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-docs/button.md

@@ -7,9 +7,14 @@
     }
     .van-row {
       padding: 0 15px;
+      margin-bottom: 20px;
     }
-    .van-col {
-      margin-bottom: 10px;
+    .van-col-24 {
+      margin-bottom: 20px;
+
+      &:last-child {
+        margin-bottom: 0;
+      }
     }
   }
 }
@@ -93,18 +98,12 @@ export default {
   <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>

docs/examples-docs/loading.md

@@ -10,10 +10,10 @@
     }
 
     .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;
     }
   }
@@ -69,6 +69,15 @@ export default {
 <div class="demo-loading__example demo-loading__example--with-bg">
   <van-loading class="some-customized-class" :color="'white'"></van-loading>
 </div>
+
+<style>
+.demo-loading__example--with-bg {
+  background-color: rgba(17, 17, 17, 0.7);
+  width: 120px;
+  padding: 45px 0;
+  border-radius: 10px;
+}
+</style>
 ```
 :::
 

docs/examples-docs/swipe.md

@@ -77,7 +77,9 @@ export default {
 ```html
 <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-docs/waterfall.md

@@ -74,6 +74,7 @@ export default {
   .waterfall-item {
     line-height: 50px;
     border-bottom: 1px solid #e5e5e5;
+    background: #fff;
   }
   .page-desc {
     padding: 5px 0;