*{font-family:Helvetica,HelveticaNeue;list-style: none;margin:0;padding:0;box-sizing: border-box;text-decoration:none;}
/*横幅*/
.banner{width: 100%;
    background: url(../img/about-banner.png) 100%;
    height: 400px;
    padding-top: 150px;}
.banner h3{font-size: 36px;font-weight: bold;color: #FFFFFF;text-align: center;}
.banner h6{font-size: 12px;font-weight: 400;color: #FFFFFF;text-align: center;    margin-top: 20px;}
/*面包屑导航*/
.breadcrumb-nav{width: 100%;box-shadow: 0px 9px 27px 0px rgba(0, 0, 0, 0.06);font-size: 16px;font-family: Microsoft YaHei;font-weight: 400;color: #3F3F3F;}
.breadcrumb-nav>div {width: 1280px;margin: 0 auto;height: 60px;display: flex;align-items: center;justify-content: space-between;}
.breadcrumb-nav>div>div:nth-child(1) {display: flex;}
.breadcrumb-nav>div>div>div:nth-child(1) {height: 60px;line-height: 60px;}
.breadcrumb-nav>div>div>div {height: 60px;line-height: 60px;margin-right: 10px;cursor: pointer;}
.breadcrumb-nav img {margin-right: 5px;}
.about-intro-on{border-bottom: 3px solid RGBA(213, 183, 120, 1);}
/*公司简介*/
.about-intro{width: 100%}
.about-intro div{    width: 1280px;margin: 75px auto;}
.about-intro div h3{    font-size: 30px;font-weight: bold;color: #171717;}
.about-intro div h5{font-size: 14px;font-weight: 400;color: #BDBDBD;}
.about-intro div p{font-size: 14px;font-weight: 400;color: #181818;line-height: 40px;margin-top: 50px;text-align: justify;margin-bottom: 80px}
.about-atmosphere{display: flex;flex-wrap: wrap;justify-content: space-between;width: 100%;margin-top: 0 !important;}
.about-atmosphere img{margin-top: 40px;width: 405px;height: 270px;}
.about-certification{width: 100%;display: none}
.about-certification div{    width: 1280px;margin: 75px auto;}
.about-certification div h3{    font-size: 30px;font-weight: bold;color: #171717;}
.about-certification div h5{font-size: 14px;font-weight: 400;color: #BDBDBD;}
.about-certification div img{width: 100%}