.top_box {
    width: 100%;
    border-top: 1px solid #dedede;
    background-color: #fff;
    position: fixed;
    top: 84px;
    z-index: 100;
}

.main {
    width: 1200px;
    margin: 0 auto;
}

.tabs {
    width: 100%;
    display: flex;
}

.tabs .tab {
    width: calc(100% / 4);
    height: 60px;
    line-height: 60px;
    box-sizing: border-box;
    text-align: center;
    border-left: 1px solid #dedede;
    font-size: 16px;
    color: #333333;
    cursor: pointer;
}

.tabs .tab2 {
    background-color: #e60012;
}

.tabs .tab a {
    color: #333;
    display: block;
    width: 100%;
    height: 100%;
}

.tabs .tab2 a {
    color: #fff;
}

.tabs:last-child {
    border-right: 1px solid #dedede;
}

.box {
    width: 100%;
    margin-top: 60px;
    background: url('../images/Laser_Processing_Machine/tu_1.jpg') no-repeat top center;
    background-size: cover;
    background-attachment: fixed;
}

.box .content .banner {
    height: 420px;
    position: relative;
    display: flex;
    justify-content: flex-start;
    align-items: center;
}

.box .content .banner .scroll {
    position: absolute;
    left: 50%;
    bottom: 50px;
    transition: all .3s;
    cursor: pointer;
    width: 49px;
    height: 41px;
    transform: translateX(-50%);
}

.box .content .banner .scroll:hover {
    padding-top: 10px;
}

.box .content .banner .scroll a {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.box .content .banner .scroll a img {
    width: 100%;
    height: 100%;
}

.box .content .banner .text .h1 {
    display: flex;
}

.box .content .banner .text .h1 div {
    color: #fff;
}

.box .content .banner .text .h1 div:nth-of-type(1) {
    font-size: 42px;
    font-weight: bold;
    padding-bottom: 35px;
    margin-right: 40px;
}

.box .content .banner .text .h1 div:nth-of-type(2) {
    font-size: 20px;
    padding-top: 56px;
    font-style: oblique;
    position: relative;
}

.box .content .banner .text .h1 div:nth-of-type(2)::before {
    content: '';
    position: absolute;
    width: 1px;
    height: 150px;
    top: -40px;
    left: -15px;
    background-color: #fff;
    transform: rotate(25.41deg);
}

.box .content .banner .txt {
    color: #fff;
    margin-top: 75px;
    font-size: 24px;
    font-weight: bold;
}

.box .cont_box {
    width: 100%;
    background-color: rgba(255, 255, 255, .8);
}

.box .cont_box .cont {
    padding-top: 80px;
}

.box .cont_box .cont .title {
    font-size: 30px;
    font-weight: bold;
    color: #150f05;
}

.box .cont_box .cont .subtitle {
    font-size: 16px;
    color: #333;
    margin-top: 35px;
}

.box .cont_box .cont .advantage {
    margin-top: 25px;
}

.box .cont_box .cont .advantage li {
    font-size: 16px;
    color: #333;
    padding-left:1em;
    text-indent:-1.3em;
}

.box .cont_box .cont .exhibition{
    margin-top: 60px;
}

.box .cont_box .cont .exhibition .tit{
    font-size: 24px;
    font-weight: bold;
    color: #150f05;
    padding-left: 25px;
    position: relative;
}

.box .cont_box .cont .exhibition .tit::before{
    content: '';
    position: absolute;
    width: 15px;
    height: 6px;
    background: url('../images/consumables/rectangle.png') no-repeat;
    top: 50%;
    left: 1px;
    transform: translateY(-50%);
}
.box .cont_box .cont .exhibition .images{
    display: flex;
    flex-wrap: wrap;
    padding-bottom: 100px;
}

.box .cont_box .cont .exhibition .images .image{
    width: calc(100% / 6 - 20px);
    margin-right: 20px;
    margin-top: 60px;
}

.box .cont_box .cont .exhibition .images .image:nth-child(6n){
    margin-right: 0;
}

.box .cont_box .cont .exhibition .images .image img{
    width: 100%;
    height: auto;
}

.box .cont_box .cont .exhibition .images .image p{
    font-size: 16px;
    color: #333;
    margin-top: 20px;
}

@media (max-width:1366px){
    .main{
        width: 960px;
    }
}
@media (max-width:960px){
    .main{
        width: 750px;
    }
}
@media (max-width:750px){
    .main {
        width: 640px;
        padding-left: 25px;
        padding-right: 25px;
    }
    .box .content .banner{
        justify-content: center;
    }
    .box .cont_box .cont .exhibition .images .image{
        width: calc(100% / 4 - 20px);
    }
    .box .cont_box .cont .exhibition .images .image:nth-child(6n){
        margin-right: 20px;
    }
    .box .cont_box .cont .exhibition .images .image:nth-child(4n){
        margin-right: 0;
    }
    .top_box{
        top: 64px;
    }
}
@media (max-width:640px){
    .main{
        width: 375px;
    }
    .box .cont_box .cont .exhibition .images .image{
        width: calc(100% / 2 - 20px);
    }
    .box .cont_box .cont .exhibition .images .image:nth-child(4n){
        margin-right: 20px;
    }
    .box .cont_box .cont .exhibition .images .image:nth-child(2n){
        margin-right: 0;
    }
    .box .cont_box .cont .exhibition .images .image:nth-child(1n){
        margin-left: 7px;
    }
}
@media (max-width:374px){
    .main{
        width: 100%;
    }
}