html,
        body {
            height: 100%;
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        div {
            box-sizing: border-box;
        }

        ::-webkit-scrollbar {
            width: 0px;
        }

        .main {
            margin: 0;
            scroll-behavior: smooth;
            /* font-size: 40px; */
            display: flex;
            flex-direction: column;
            /* width: 100%; */
            height: 100%;
            overflow-y: auto;
            overflow-x: hidden;
            border: 1px solid #000;
            scroll-snap-type: y mandatory;
            /*设置父级*/
            padding: 0;
        }

        .row {
            height: 100vh;
            width: 100%;
            flex-shrink: 0;
            scroll-snap-align: center;
            /*子级设置*/
            text-align: center;
            background-repeat: no-repeat;
            background-position: center center;
            background-size: cover;
        }

        .row>.box {
            background: rgba(0, 0, 0, 0.6);
            height: 100vh;
            width: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: #fff;
        }

        .row>.box>.content {
            /* width: 900px; */
        }
        .how-step{
            width: fit-content;
            margin: 0 auto;
        }

        h3 {
            font-size: 3em;
            padding: 10px;
            margin: 10px;
        }

        .row:nth-child(1) {
            /* background-image:url(); */
            background-image: url('/assets/img/bg-5.jpeg');

        }

        .row:nth-child(2) {
            background-image: url('/assets/img/bg-6.jpeg');

        }

        .row:nth-child(3) {
            background-image: url('/assets/img/bg-7.jpeg');
        }

        .row:nth-child(4) {
            background-image: url('/assets/img/bg-3.jpeg');
        }

        .row:nth-child(5) {
            background-image: url('/assets/img/bg-2.jpeg');
        }

        .header {
            /* max-width:100%; */
            margin: 0 auto;
            /* position:fixed; */
            top: 0;
            display: flex;
            flex-direction: row;
            justify-content: space-between;
            align-items: center;
            height: 120px;
            /* background: #2f2f2f; */
            position: fixed;
            width: 100%;
            padding: 0 10em;
            z-index: 999;

        }

        .logo {
            font-size: 3em;
            font-family: "Poppins";
            color: #fff;
            font-weight: 700;
            text-transform: uppercase;
        }


        .white {
            color: #fff;
        }

        .yellow {
            color: #ff9800;
        }

        .down-btn {
            padding: 15px;
            background: #ff9800;
            color: #000;
            width: 250px;
            text-align: center;
            font-weight: bolder;
            /* height:50px; */
            /* line-height: 50px; */
        }

        .down-btn>img {
            width: 50px;
            height: 50px;
            margin-right: 10px
        }

        .site-logo {
            height: 60px;
            width: auto;
        }

        .feature-box {
            width: 25%;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 10px;
            font-weight: lighter;
            text-align: center;
        }

        .feature-icon {
            width: 40px;
            height: 40px;
        }

        .feature-box .title {
            font-size: 1.2em;
            font-weight: bolder;
            margin-bottom: 20px;
        }

        .steps {
            position: fixed;
            right: 150px;
            bottom: 500px;
        }

        .step-icon {
            background: #5f5f5f;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: solid 1px #fff;
            position: absolute;
            right: -5px;
        }



        .hovertree-tracklist ul li {
            list-style: none;
        }

        .hovertree-trackrcol {
            position: fixed;
            right: 20px;
            top: calc(60vh - 30px);
        }

        .hovertree-tracklist {
            margin: 20px;
            padding-left: 5px;
            position: relative;
        }

        .hovertree-tracklist li {
            position: relative;
            /* padding: 0px 30px 0 25px; */
            line-height: 20px;
            border-right: 1px solid #d9d9d9;
            color: #fff;
            padding-bottom: 40px;
            padding-right: 20px;
        }

        .hovertree-tracklist li:last-child {

            padding-bottom: 0px;
            padding-right: 20px;
        }

        .hovertree-tracklist li.current {
            color: #ff9800;
            padding-top: 0;
            border-left-color: #fff;
        }

        .hovertree-tracklist li.current>div>.step-icon {
            background: #ff9800;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            border: solid 1px #fff;
            position: absolute;
            right: -5px;
        }

        .hovertree-tracklist li .node-icon {
            position: absolute;
            left: -6px;
            top: 50%;
            width: 11px;
            height: 11px;
            /* background: url(http://hovertree.com/texiao/css/25/img/order-icons.png) -21px -72px no-repeat; */
        }

        .hovertree-tracklist li.first .node-icon {
            /* background-position: 0 -72px; */
        }

        .hovertree-tracklist li .time {
            margin-right: 20px;
            position: relative;
            top: 4px;
            display: inline-block;
            vertical-align: middle;
        }

        .hovertree-tracklist li .txt {
            max-width: 600px;
            position: relative;
            top: 4px;
            display: inline-block;
            vertical-align: middle;
        }

        .hovertree-tracklist li.first .time {
            margin-right: 20px;
        }

        .hovertree-tracklist li.first .txt {
            max-width: 600px;
        }

        .row-desc {
            font-size: 2em;
        }

        .btn-box {
            display: flex;
            flex-direction: row;
            justify-content: center;
            margin-top: 80px;
        }

        .margin-btn {
            margin-right: 30px;
        }

        .site-list {
            width: 1000px;
            margin: 0 auto;
        }

        .fill-height {
            height: 130px;
        }

        .feature-content{
            display:flex;
            flex-direction: row;
            margin-top:30px;
            
        }

        .step-title{
            font-size:1.5em;
            font-weight: bold;
        }
        .step-desc{
            font-size:1.2em;
        }

        /**pc**/
        @media screen and (min-width: 1281px) {
            .header {
                padding: 0 10em;
            }
            .feature-content{
                width:1200px;
            }

            

            .row>.box>.content {
                width: 1200px;
            }


        }

        /*ipad*/
        @media screen and (min-width:600px) and (max-width: 1280px) {
            .header {
                padding: 0 10px;
            }

            .content {
                padding: 0 10px;
            }

            .list-item {
                width: 33.33%;
                padding: 0 10px;
            }

            .cu-modal.bottom-modal::before {
                vertical-align: middle;
            }



        }

        /*mobile*/
        @media screen and (max-width: 568px) {
            .header {
                padding: 0 10px;
                height: 60px;
            }

            .content {
                padding: 0 10px;
            }

            .logo {
                font-size: 2em;
            }

            .desc {
                font-size: 1.2em;
            }
            .row-desc{
                font-size: 1.2em;
            }

            .font-xl {
                font-size: 1.5em;
            }
            .feature-title{
                display: none;
            }

            .row>.box>.content {
                width: 100%;
                padding: 10px;
            }

            .btn-box {
                display: flex;
                flex-direction: column;
                align-items: center;
                margin-top: 50px;
            }
            .row:nth-child(4) .btn-box{
                margin-top:10px;
            }

            .margin-btn {
                margin-right: 0;
                margin-bottom: 20px;
            }

            .down-btn {
                width: 50vw;
            }

            .down-btn>img {
                width: 20px;
                height: 20px;
            }

            .site-logo {
                height: 30px;
            }

            .site-list {
                width: 100%;
                /* margin:0 auto; */
            }

            .fill-height {
                height: 0;
            }

            .step-title{
                font-size:1.2em;
                font-weight: bold;
            }
            .step-desc{
                font-size:1em;
            }
            .feature-content{
                flex-direction: column;
                padding:10px;
            }

            .feature-icon{
                margin-right:10px;
            }

            .feature-box{
                width:100%;
                margin-bottom:10px;
                display: flex;
                flex-direction: row;
            }

            .feature-box .title {
                margin-bottom:0;
                font-size:1em;
                text-align: left;
            }
            .feature-box .desc {
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
                font-size:.8em;
                text-align: left;
            }

            


            .hovertree-trackrcol {
                display: none;
            }
        }