*{
    margin: 0 auto;
}

#main{
    margin: 0 auto;
    background-color: #121212;
}

#video_part{
    width: 100%;
    height: 800px;
    background-image: url("../img/视频占位.webp");
    background-repeat: no-repeat;
    background-size: 100% 800px;
}

.video_img{
    width: 100px;
    height: 100px;
}

.first_video{
    z-index: 5;
    position: relative;
    bottom: 444px;
    width: 100%;
    height: 700px;
    display: none;
}

.video_title{
    text-align: center;
    padding-top: 200px;
    margin-bottom: 200px;
    width: 500px;
    height: 50px;
    font-size: 38px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 50px;
}

#intro_font{
    background-color: #121212;
    width: 100%;
    height: 450px;
    font-size: 30px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 40px;
}

#intro_font p{
    width: 65%;
    padding-top: 100px;
    text-indent: 2em;
}

#product_part{
    width: 100%;
    height: 4550px;
}

.product_all{
    width: 100%;
    height: 600px;
    background: url("../img/背景2.webp") no-repeat 0 / 100% 600px;
}

.product_camera{
    padding-top: 200px;
    width: 200px;
    height: 160px;
    font-size: 28px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 45px;
    margin-left: 6%;
}

.product_camera p{
    position: relative;
    top: 40px;
    left: 30px;
}

.product_pad{
    /*text-align: center;*/
    width: 220px;
    height: 160px;
    font-size: 28px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 40px;
    position: relative;
    bottom: 270px;
    margin-left: 30%;
}

#pad{
    position: relative;
    bottom: 130px;
    right: 30px;
}

.product_phone{
    width: 220px;
    height: 160px;
    font-size: 28px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 40px;
    position: relative;
    bottom: 430px;
    margin-left: 56%;
}

#phone{
    position: relative;
    bottom: 165px;
    right: 30px;
}

.product_watch{
    width: 220px;
    height: 160px;
    font-size: 28px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 40px;
    position: relative;
    bottom: 500px;
    margin-left: 73%;
}

#watch{
    position: relative;
    bottom: 130px;
    right: 30px;
}

#product_details{
    width: 100%;
    height: 1300px;
    background-image: url("../img/背景3.webp");
    background-repeat: no-repeat;
    background-size: 100% 1300px;
}

#product_details_one{
    width: 100%;
    height: 1300px;
    background-image: url("../img/背景4.webp");
    background-repeat: no-repeat;
    background-size: 100% 1300px;
}

#product_details_two{
    width: 100%;
    height: 1300px;
    background-image: url("../img/专家评估系统1.webp");
    background-repeat: no-repeat;
    background-size: 100% 1300px;
}

.product_title{
    text-align: center;
    padding-top: 110px;
    width: 280px;
    height: 70px;
    font-size: 42px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 70px;
}

.product_info p{
    width: 200px;
    height: 60px;
    font-size: 38px;
    font-weight: 500;
    color: #FFFFFF;
    line-height: 40px;
    margin: 120px auto auto 10%;
}

#need_gap{
    margin-bottom: 20px;
}

.product_info li{
    width: 80%;
    height: 80px;
    font-size: 28px;
    font-weight: 300;
    color: #E6E6E6;
    line-height: 40px;
}

.product_font{
    margin-top: 10px;
    width: 80%;
    height: 80px;
    font-size: 28px;
    font-weight: 300;
    color: #E6E6E6;
    line-height: 50px;
}

.product_font:nth-of-type(2){
    text-indent: 2em;
    margin-top: 50px;
}

.details_font{
    width: 240px;
    height: 40px;
    font-size: 28px;
    font-weight: 300;
    color: #D9D9D9;
    line-height: 40px;
    margin-top: 40px;
    margin-right: 12%;
    position: relative;
    top: 250px;
}

.horizon_line{
    position: relative;
    top: 230px;
    width: 280px;
    right: 12px;
    height: 1px;
    border: #B2B2AC 1px dashed;
}

.horizon_line:nth-of-type(6){
    width: 200px;
    right: 0;
    left: 24px;
}

.horizon_line:nth-of-type(8){
    width: 220px;
    right: 0;
    left: 14px;
}

.horizon_line:nth-of-type(10){
     width: 330px;
     right: 44px;
 }

.horizon_line:nth-of-type(12){
    width: 300px;
    right: 25px;
}

.horizon_line:nth-of-type(14){
    width: 290px;
    right: 22px;
}

.horizon_line:nth-of-type(18){
    width: 250px;
    right: 0;
}

.point{
    width: 16px;
    height: 16px;
    background-color: #FFFFFF;
    border-radius: 100%;
    position: relative;
    right: 50%;
    bottom: 8px;
}

#function_part{
    width: 100%;
    height: 3200px;
}

.main_function{
    width: 100%;
    height: 900px;
    background: url("../img/核心功能.webp") no-repeat 0 / 100% 900px;
}

.function_title{
    width: 200px;
    height: 40px;
    font-size: 40px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 40px;
    padding-top: 130px;
}

.function_info{
    width: 78%;
    height: 300px;
    font-size: 32px;
    font-weight: 300;
    color: #FFFFFF;
    line-height: 55px;
    text-indent: 2em;
    margin-top: 80px;
}

.function_info:nth-of-type(2){
    color: #CCCCCC;
    height: 400px;
}

.function_info:nth-of-type(4){
    color: #CCCCCC;
}

.function_info:nth-of-type(6){
    color: #CCCCCC;
}

.function_mode{
    width: 100%;
    height: 1600px;
    background: url("../img/背景5.webp") no-repeat 0 / 100% 1600px;
}

.function_title_small{
    width: 350px;
    height: 40px;
    font-size: 38px;
    font-weight: 400;
    color: #FFFFFF;
    line-height: 40px;
}

.function_title_small:nth-of-type(1){
    padding-top: 150px;
}

.advantage{
    width: 100%;
    height: 700px;
    background: url("../img/主要优势.webp") no-repeat 0 / 100% 700px;
}

.advantage_title{
    width: 200px;
    height: 40px;
    font-size: 44px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 40px;
    padding-top: 100px;
    margin-bottom: 40px;
}

.advantage_info{
    width: 42%;
    height: 100px;
    background: url("../img/过程可视、轨迹呈现.webp") no-repeat 0%  / 14% 60px ;
    font-size: 34px;
    font-weight: 500;
    color: #D9D9D9;
    line-height: 100px;
    text-align: center;
    text-indent: 2em;
    float: left;
    margin-left: 60px;
    margin-top: 30px;
}