*{
    margin: 0 auto;
}

#app{
    margin: 0 auto;
    width: 100%;
}

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

.first_video{
    z-index: 5;
    position: relative;
    bottom: 450px;
    width: 100%;
    height: 700px;
    display: none;
}

.video_font{
    width: 50%;
    height: 238px;
    padding-top: 220px;
    font-size: 34px;
    font-weight: 400;
    color: #FFFFFF;
    line-height: 0;
    text-align: center;
    user-select: none;
}

.video_font p{
    text-align: center;
    width: 100%;
    height: 150px;
    padding-top: 80px;
    font-size: 26px;
    font-weight: 300;
    color: #FFFFFF;
    line-height: 0;
}

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

#intro_part{
    width: 100%;
    height: 840px;
    background-color: #151513;
}

.intro_title{
    text-align: center;
    width: 40%;
    height: 100px;
    font-size: 34px;
    font-weight: 400;
    color: #E6E6E6;
    line-height: 100px;
    padding-top: 60px;
}

.intro_info{
    text-indent: 2em;
    width: 75%;
    height: 357px;
    margin-top: 30px;
    font-size: 24px;
    font-weight: 300;
    color: #CCCCCC;
    line-height: 34px;
}

#devices_part p{
    width: 20%;
    height: 14px;
    font-size: 24px;
    font-weight: 300;
    color: #FFFFFF;
    line-height: 0;
    position: relative;
    bottom: 40px;
    text-align: center;
}

.devices_detail{
    background-image: url("../img/瞄准仪.webp");
    background-repeat: no-repeat;
    background-size: 100% 800px;
    width: 100%;
    height: 800px;
    font-size: 38px;
    font-weight: bold;
    color: #FFFFFF;
    line-height: 280px;
    text-align: center;
}

.devices_detail a{
    text-decoration: none;
}

.devices_detail:nth-of-type(1){
    background-image: url("../img/瞄准仪.webp");
}

.devices_detail:nth-of-type(2){
    background-image: url("../img/显控终端.webp");
}

.devices_detail:nth-of-type(3){
    background-image: url("../img/专家评估系统.webp");
}

#news_part{
    width: 100%;
    height: 3100px;
}

.news_title{
    width: 150px;
    height: 60px;
    font-size: 36px;
    font-weight: bold;
    color: #333333;
    line-height: 60px;
    margin-top: 60px;
}

.swiper{
    margin-top: 40px;
    width: 800px;
    height: 550px;
}

.swiper img{
    width: 800px;
    height: 500px;
}

.news_divide{
    margin-top: 30px;
    width: 85%;
    height: 490px;
    margin-bottom: 60px;
    background-image: url("../img/箭头.webp");
    background-repeat: no-repeat;
    background-size: 70px 35px;
    background-position: 4% 90%;
    border: #E6E6E6 1px solid;
    transition: box-shadow 0.8s;
}

.news_divide:hover{
    box-shadow: 0 0 20px 1px rgba(0,0,0,0.16);
    -webkit-transform:translate3d(-1px,1px,0px);
}

.news_date{
    width: 29px;
    height: 33px;
    font-size: 52px;
    font-weight: bold;
    color: #999999;
    line-height: 33px;
    margin-left: 30px;
    padding-top: 50px;
}

.news_date p{
    width: 157px;
    height: 20px;
    font-size: 32px;
    font-weight: bold;
    color: #CCCCCC;
    line-height: 33px;
    padding-top: 30px;
}

.news_info{
    margin-top: 50px;
    width: 93%;
    height: 20px;
    font-size: 36px;
    font-weight: bold;
    color: #333333;
    line-height: 60px;
    padding-top: 40px;
}

.news_info p{
    width: 100%;
    /*margin-top: 10px;*/
    height: 34px;
    font-size: 32px;
    font-weight: bold;
    color: #666666;
    line-height: 40px;
    padding-top: 20px;
}

.news_more{
    border: #CCCCCC 1px solid;
    width: 260px;
    height: 90px;
    font-size: 30px;
    font-weight: 400;
    color: #666666;
    text-align: center;
    line-height: 90px;
}

#news_part a{
    text-decoration: none;
}