.pc_header.white .nav li:nth-child(4) > a{color: #ff5a00}
.bg_01{width: 930px;height: 605px;margin: 270px auto 150px}
.bg_01 .bg1-con{width: 100%;height: 550px;border: 25px #ff5a00 solid;padding: 0 45px;color: black;text-align: center;font-size: 18px}
.bg_01 .bg1-con .title{font-size: 70px;font-weight: bold}
.bg_01 .bg1-con p.title{margin-bottom: 40px}
.bg_01 .bg1-con p{text-align: center;color: #1b1b1b;line-height: 35px}
.bg_01 .case-link{font-size: 19px;margin-top: 10px;margin-left: 755px;}
.bg_01 .case-link span{color: #949495;cursor: pointer;}

.bg_02,.bg_03{color: black;text-align: center;position: relative}
.bg_02 .title1{font-size: 48px;color: #ff5a00}
.bg_02 .title2{color:#717071;font-size:22px}
.bg_02 .bg2-img-div{width: 832px;height: 503px;margin: 110px auto 145px}
.bg_02 .bg2-l,.bg_02 .bg2-r{position: absolute;top: 100px;width: 210px;height: 330px;left: 50%}
.bg_02 .bg2-l{margin-left: -470px;text-align: right;}
.bg_02 .bg2-r{margin-left: 270px;text-align: left}
.bg_02 .bg2-l p:nth-child(1),.bg_02 .bg2-r p:nth-child(1){font-size: 73px;color: #ff5a00}
.bg_02 .bg2-l p:nth-child(2),.bg_02 .bg2-r p:nth-child(2){font-size: 19px;color: #595757;font-weight: bold}
.bg_02 .bg2-l p:nth-child(3),.bg_02 .bg2-r p:nth-child(3){font-size: 19px;color: #717071;line-height: 40px}


.bg_03{margin-bottom: 140px}
.bg_03 p{font-size: 19px;color:#717071; }
.bg_03 p:nth-child(1){font-size: 34px;color: #ff5a00;font-weight: bold;}
.bg_03 p:nth-child(2){font-size: 34px;color: #ff5a00;margin-bottom: 50px;font-weight: bold}

.bg_04{justify-content: space-around;width: 1000px;margin: 0px auto 100px}
.bg_04 .bg4-txt{align-items: start;margin-left: 15px}
.bg_04 .bg4-txt p:nth-child(1){font-size: 17px;margin: 0px;color:#717071}
.bg_04 .bg4-txt p:nth-child(2){font-size: 45px;color: #ff5a00;margin: 0px}



.dv1 {
    width:100%;
    height: 100px;
    position: relative;
}
.liner {
    width:100%;
    height:1px;
    background-color: white;
    position: absolute;
    top:50%;
}
.dv2 {
    top:20px;
    left: 290px;
    color: #ff5a00;
    font-size: 33px;
    text-align:center;
    width:220px;
    height:50px;
    line-height: 50px;
    margin:0 auto;
    background-color: #fff;
    z-index: 3;
    position: absolute;
}
.point{width: 10px;height: 10px;background-color: #949495;border-radius: 50%;display: inline-block;margin-left: 5px;}


@media (max-width: 750px) {
    .bg_01{width: 100%;height: 1260px;margin-top: 210px}
    .bg_01 .bg1-con{width: 655px;height: 1255px;margin: 0px auto}

    .bg_01 .dv2{left: 143px;font-size: 36px;margin-top: 50px}
    .bg_01 .bg1-con .title{font-size: 46px;color: black;margin-top: 40px}
    .bg_01 .bg1-con p{font-size: 28px;line-height: 58px}
    .bg_01 .case-link{margin-left: 480px;margin-top: 45px;}
    .bg_01 .case-link a{display: flex;flex-direction: row;align-items: center;}

    .bg_01 .case-link span{font-size: 26px;margin: auto 4px}
    .bg_01 .case-link span:nth-child(3){font-size: 26px;margin-left: 8px}

    .bg_02 .bg-p1,.bg_02 .bg-p2{align-items: flex-start;margin: 95px auto;width: 645px}
    .bg_02 .bg-p1 div:nth-child(1),.bg_02 .bg-p2 div:nth-child(1){font-size: 101px;color: #ff5a00;line-height: 1;margin-right: 40px;font-weight: bold}
    .bg_02 .bg-p1 div:nth-child(2),.bg_02 .bg-p2 div:nth-child(2){width: 510px;font-size: 27px;color: #595757;text-align: left;letter-spacing: 2px;line-height: 40px}
    .bg_02 .bg2-img-div{width: 750px;overflow: hidden;height: 540px}
    .bg_02 .bg2-img-div img{width: 120%;margin-left: -10%;}

    .bg_03{padding: 0 24px;line-height: 60px}
    .bg_03 p{font-size: 26px;color: #666666}
    .bg_03 p:nth-child(1),.bg_03 p:nth-child(2){font-size: 32px;font-weight: bold;}

    .bg_04{width: 100%;}
    .bg_04 .bg4-txt p:nth-child(1){font-size: 20px;margin: 0px;color: #717171}
    .bg_04 .bg4-txt p:nth-child(2){font-size: 34px;color: #ff5a00;margin: 0px}
}