[Build] revert site to webpack config (#3747)

docs/site/mobile/App.vue

@@ -0,0 +1,88 @@
+<template>
+  <div>
+    <van-nav-bar
+      v-show="title"
+      class="van-doc-nav-bar"
+      :title="title"
+      :left-arrow="showNav"
+      @click-left="onBack"
+    />
+    <keep-alive>
+      <router-view :weapp="weapp" />
+    </keep-alive>
+  </div>
+</template>
+
+<script>
+function getQueryString(name) {
+  const arr = location.search.substr(1).split('&');
+  for (let i = 0, l = arr.length; i < l; i++) {
+    const item = arr[i].split('=');
+    if (item.shift() === name) {
+      return decodeURIComponent(item.join('='));
+    }
+  }
+  return '';
+}
+
+export default {
+  computed: {
+    title() {
+      const { name } = this.$route.meta;
+      return name ? name.replace(/-/g, '') : '';
+    },
+
+    showNav() {
+      return getQueryString('hide_nav') !== '1';
+    },
+
+    weapp() {
+      return getQueryString('weapp') === '1';
+    }
+  },
+
+  methods: {
+    onBack() {
+      history.back();
+    }
+  }
+};
+</script>
+
+<style lang="less">
+@import '../../../src/style/var';
+
+body {
+  color: @text-color;
+  font-family: 'PingFang SC', Helvetica, 'STHeiti STXihei', 'Microsoft YaHei', Tohoma, Arial, sans-serif;
+  line-height: 1;
+  background-color: #f8f8f8;
+  -webkit-font-smoothing: antialiased;
+}
+
+::-webkit-scrollbar {
+  width: 0;
+  background: transparent;
+}
+
+.van-doc-nav-bar {
+  height: 56px;
+  line-height: 56px;
+
+  .van-nav-bar__title {
+    font-size: 17px;
+    text-transform: capitalize;
+  }
+
+  .van-icon {
+    color: @gray-dark;
+    font-size: 24px;
+    cursor: pointer;
+  }
+}
+
+.van-doc-demo-section {
+  margin-top: -56px;
+  padding-top: 56px;
+}
+</style>