更新组件演示页面，方便用户直接使用组件，去除tn-button的默认背景色，tn-avatar修改参数默认值，修复tn-avatar-group最开始头像进行了偏移、修复无法使用标签的bug，tn-badge修改参数默认值，tn-collapse-item修复背景颜色失效问题，滚动通知移除默认背景颜色和字体大小，tn-count-down修复时间单位不正确问题，列表组件修复背景颜色问题，tn-nav-bar返回按钮修改为可进行修改的图标，tn-step添加点击步骤进行跳转，tn-loading修复默认激活颜色出错问题，tn-tag移除默认背景颜色，优化阴影大小css

componentsPage/index-list/avatar/index-list.vue

@@ -0,0 +1,70 @@
+<template>
+
+  <view class="components-index-list">
+
+    <!-- 顶部自定义导航 -->
+    <tn-nav-bar fixed>IndexList索引列表</tn-nav-bar>
+
+    <!-- 页面内容 -->
+    <view :style="{paddingTop: vuex_custom_bar_height + 'px'}">
+      
+      <tn-index-list :scrollTop="scrollTop" :indexList="indexList" :customBarHeight="vuex_custom_bar_height" :stickyTop="vuex_custom_bar_height">
+        <view v-for="(item, index) in list" :key="index">
+          <tn-index-anchor :index="item.letter"></tn-index-anchor>
+          <view v-for="(data_item,data_index) in item.data" :key="data_index" class="index-list-item tn-border-solid-bottom">
+            <image class="index-list-item__image" src="/static/favicon.ico"></image>
+            <view class="index-list-item__name">{{ data_item.name }}</view>
+          </view>
+        </view>
+      </tn-index-list>
+
+    </view>
+
+  </view>
+
+</template>
+
+<script>
+  import indexList from '../../mock/index.list.js'
+  const letterArr = indexList.list.map(val => {
+    return val.letter
+  })
+  export default {
+    name: 'componentsIndexListAvatar',
+    data() {
+      return {
+        // 滚动的距离
+        scrollTop: 0,
+        // 索引列表
+        indexList: letterArr,
+        list: indexList.list
+      }
+    },
+    onPageScroll(e) {
+      this.scrollTop = e.scrollTop
+    },
+    methods: {
+      
+    }
+
+  }
+</script>
+
+<style lang="scss" scoped>
+  .index-list-item {
+    display: flex;
+    flex-direction: row;
+    align-items: center;
+    justify-content: flex-start;
+    overflow: hidden;
+    color: $tn-font-color;
+    font-size: 28rpx;
+    
+    &__image {
+      width: 100rpx;
+      height: 100rpx;
+      margin: 8rpx 8rpx;
+      margin-right: 10rpx;
+    }
+  }
+</style>