<style>
  html {
    margin: 0 auto;
    padding: 0 auto;
  }

  .layui-side{
    position: relative!important;
    z-index: 9!important;
    background-color: #f9fafa!important;
  }

  .layui-nav{
    background-color: white!important;  
  }

  .layui-nav .layui-nav-item a{
    color: black!important;
  }

  .layui-nav-child dd a{
    margin-left: 10px;
  }
  .layui-this > a {
    /* 导航栏选中颜色 */
    background-color: #d6dce2 !important;
  }

  .layui-nav-itemed>.layui-nav-child a{
    /* 列表文字颜色 */
    color: black;
  }

  /* .layui-nav-itemed>.layui-nav-child a:hover{
    color: black;
  } */
  .sel-this{
    background-color:#e6e6e6;
  }

  #help_nav{
    padding:3% 0 2% 1%;
    position: relative!important;
    scrollbar-width: none;
    /* firefox */
    -ms-overflow-style: none;
    /* IE 10+ */
    overflow-x: hidden;
    overflow-y: auto;
    height: 700px;

  }
  #help_nav #nav-tree{
    margin: 0px;
    padding: 0px;
  }

  #content1::-webkit-scrollbar {
    display: none;
    /* Chrome Safari */
  }

  #content2::-webkit-scrollbar {
    display: none;
    /* Chrome Safari */
  }
  img{
    border-radius: 5px;
  }

  #help_nav::-webkit-scrollbar {
    display: none;
    /* Chrome Safari */
  }

  #body1{
    font-size: 18px;
    line-height: 40px;
  }
  #body2{
    font-size: 18px;
    line-height: 40px;
  }

  #content1 {
    scrollbar-width: none;
    /* firefox */
    -ms-overflow-style: none;
    /* IE 10+ */
    /* background-color: rgb(242 242 242); */
    margin: 2.5% 0 2% 2%;
    height:700px;
    width:81%;
  }

  #content2 {
    scrollbar-width: none;
    /* firefox */
    -ms-overflow-style: none;
    /* IE 10+ */
    /* background-color: rgb(242 242 242); */
    margin: 2.5% 0 2% 2%;
    height:700px;
    width:81%;
  }

  a {
    text-decoration: none;
  }

  .leftTEXT {
    display: inline-block;
    vertical-align: top;
    padding-left: 10px;
  }

  .leftTEXT p:first-child {
    color: #fff;
    font-size: 18px;
    padding-bottom: 2px;
  }

  .leftTEXT p:nth-child(2) {
    font-size: 30px;
    color: #fff;
  }

  .centerleft {
    float: left;
    width: 45%;
  }

  .centerright {
    width: 45%;
    text-align: center;
    float: right;
  }

  .centerright .centerBtn {
    margin: 0 auto;
    margin-top: 5px;
    cursor: pointer;
    width: 96px;
    height: 34px;
    background: url(../img/home/13foot/dl.png);
  }

  .centerBtn:hover {
    background: url(../img/home/13foot/dl_a.png);
  }

  .centerBtn a {
    display: block;
    width: 100%;
    height: 100%;
  }

  .copy {
    height: 70px;
    border-top: 1px solid #4f3839;
    color: #eee;
    text-align: center;
    background-color: #1d0001;
    min-width: 1200px;
  }

  .copy span {
    color: #897a7b;
    line-height: 70px;
  }

  .footer .inner {
    padding-top: 60px;
    box-sizing: border-box;
  }
</style>