* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
ul,li{
    list-style: none;
}
body {
    background-color: #fff;
    font-family: Helvetica Neue, Helvetica, Arial, sans-serif;
}
html,
body {
    position: relative;
    height: 100%;
}
a{
    text-decoration: none;
}
.clearfix::after {
    content: "";
    display: block;
    clear: both;
}
.text-left{
    text-align: left;
}
/* .to-white{
    filter: brightness(0) invert(1);
} */
.common-img{
    width: 100%;
    height:100%;
    object-fit: cover;
}
.common-a{
    display: block;
    width: 100%;
    height:100%;
}
.ellipsis{
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.transition{
    transition: all 0.4s ease;
}
.pointer{
    cursor: pointer;
}

/* 图片放大 */
.img-hover{
    transform: scale(1);
    overflow: hidden;
}
.img-hover img{
    transition: all 0.4s ease;
}
.img-hover:hover img{
    transform: scale(1.2);
}


.text-center{
    text-align: center;
}
.text-right{
    text-align: right;
}
.wap_show{
    display: none !important;
}
/* .phone_show{
    display: none !important;
} */


.relative{
    position: relative;
}

 /* 遮罩层 */
.mask{
    position: relative;
}
.mask::after{
    content: "";
    position: absolute;
    left:0;
    top:0;
    width: 100%;
    height:100%;
    background-color: rgba(0,0,0,0.3);
    z-index: 2;
    transition: all 0.4s ease;
    display: none;
}
.mask:hover::after{
    display: block;
}

/* head开始 */
#head{
    position: fixed;
    left:0;
    top:0;
    z-index: 20;
    width: 100%;
    background-color: #fff;
}
.head {
    width: 100%;
    height: 150px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 3.5%;
}
.head .logo_box {
    width: 124px;
    height: 76px;
}
.head .logo_box img{
    height:100%;
    width:auto;
}
.head .wap_logo{
    display: none;
}
.nav_list{
    width:30%;
    height:30px;
    display: flex;
    justify-content: space-between;
}
.nav_list li{
    height:30px;
    line-height: 30px;
}
.nav_list li a{
    font-size: 18px;
    color:#000;
}
/* head添加scroll类 */
.head.scroll{
    height:75px;
    box-shadow: 0 0 10px 2px rgb(0 0 0 / 5%);
}
.head.scroll .logo_box{
    height:32px;
    width:auto;
}
.head.scroll .logo{
    display: none;
}
.head.scroll .wap_logo{
    display: block;
}

/* footer开始 */
.footer{
    width:100%;
    height:400px;
    /* background-color: #122447; */
    background: #fff;
    padding:150px 3.5% 50px;
}
.footer_con{
    width:100%;
    height:100%;
    display: flex;
    justify-content: space-between;
    padding-bottom: 30px;
    border-bottom: 2px solid #000;
}
.footer_con .left{
    height:100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.footer_con .center{
    height:100%;
}
.footer_con .right{
    height:100%;
    display: flex;
    flex-direction: column;
    align-items:center;
    justify-content: space-between;
}
.footer_con .left .cn{
    font-size: 36px;
    color:#000;
}
.footer_con .left .en{
    font-size: 18px;
    color:#444;
}
.footer_con .center .phone_tit{
    font-size: 16px;
    color:#444;
    transform: translateX(5px);
}
.footer_con .center .phone{
    font-size: 68px;
    color:#000;
    font-weight: bold;
}
.footer_con .right .contact_ewm{
    width:140px;
    height:140px;
    display: block;
}
.footer_con .right .text{
    font-size: 16px;
    color:#444;
}
.footer_beian{
    padding-top: 10px;
}
.footer_beian a{
    font-size: 14px;
    color:#000;
}


.about p{
    font-size: 22px;
    color:#000;
    line-height: 1.5;
    margin-bottom: 20px;
}

/* 案例文字 */
.case{
    position: relative;
}
.case_tit_box{
    position: absolute;
    left:0;
    bottom:0;
    width: 100%;
    /* height:180px; */
    padding:30px;
    box-sizing: border-box;
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 4;
}
.case:hover .case_tit_box{
    opacity: 1;
}
.case_tit{
    color:#fff;
    font-size: 30px;
    line-height: 2;
}
.case_subtit{
    color:#fff;
    font-size: 14px;
    opacity: 0.9;
}
.case_sorttit{
    color:#fff;
    font-size: 18px;
    font-weight: bold;
    text-transform: uppercase;
    margin-top: 15px;
}


/* 案例 */
.case_content dl{
    width: 100%;
}
.case_content dl dt,
.case_content dl dd{
    width: 31%;
    float:left;
    margin-right: 3.5%;
    margin-bottom: 40px;
    position: relative;
}
.case_content dl dt{
    height:800px;
}
.case_content dl dd{
    height:380px; 
}
.case_content dd:nth-of-type(2n){
    margin-right: 0;
}
.case_content dl:nth-of-type(2n) dt{
    float:right;
    margin-right: 0;
}
.case img{
    position: absolute;
    z-index: 1;
}
.case a{
    position: absolute;
    z-index: 3;
}
@media (max-width:1768px){
    .case_content dl dt{
        height:720px;
    }
    .case_content dl dd{
        height:340px;
    }
}

@media (max-width:1680px){
    .case_tit{
        font-size: 28px;
    }
}
@media (max-width:1440px){
    #head{
        height:120px;
    }
    .footer{
        height:320px;
        padding: 100px 3.5% 50px;
    }
    .foot_logo{
        width: 150px;
    }
    .contact_ewm{
        width: 100px;
        height:100px;
    }
    .phone{
        font-size: 54px;
    }
    .webchat{
        font-size: 22px;
    }
    .case_tit {
        font-size: 24px;
    }
    .case_sorttit{
        margin-top: 10px;
    }
    .case_content dl dt{
        height:600px;
    }
    .case_content dl dd{
        height:280px;
    }
}
@media (max-width:1024px){
    .wap_show{
        display: block !important;
    }
    .pc_show{
        display: none !important;
    }
    #head{
        height:80px;
    }
    .head{
        height:60px;
        position: relative;
    }
    .head .logo{
        display: none;
    }
    .head .wap_logo{
        display: block;
    }
    .head .logo_box{
        width:auto;
        height:30px;
    }

/* head添加scroll类 */
.head.scroll{
    height:60px;
}
.head.scroll .logo_box{
    height:30px;
    width:auto;
}





    .head::after{
        position: absolute;
        content:"";
        left:2%;
        bottom:0;
        width: 96%;
        height:2px;
        background-color: #ddd;
    }
    .nav_btn{
        position: absolute;
        right:2%;
        top:15px;
        width: 30px;
        height:30px;
    }
    .nav_btn::before,
    .nav_btn::after{
        position: absolute;
        content:"";
        background-color: #666;
        transition: all 0.4s ease;
    }
    .nav_btn::before{
        top: 14px;
        left:0;
        width: 100%;
        height:2px;
    }
    .nav_btn::after{
        top:0;
        left:14px;
        width: 2px;
        height:100%;
    }
    .nav_btn.navbtn-active::before{
        transform: rotate(45deg);
        background-color: #fff;
    }
    .nav_btn.navbtn-active::after{
        transform: rotate(45deg);
        background-color: #fff;
    }
    #head.head-bg{
        background-color: rgba(18,36,71,0.9);
    }
    #head.head-bg .wap_logo{
        filter: brightness(0) invert(1);
    }
    .nav_list{
        position: absolute;
        top:60px;
        left:0;
        width: 100%;
        height:calc(100vh - 60px);
        background-color: rgba(18,36,71,0.9);
        z-index: 10;
        display: none;
        padding-top: 30px;
        box-sizing: border-box;
    }
    .wap-nav-open{
        display: block;
    }
    .nav_list li{
        width: 100%;
        height:80px;
        line-height: 80px;
        text-align: center;
    }
    .nav_list li a{
        color:#fff;
        font-size: 36px;
    }
    .foot_logo{
        width:160px;
    }
    .contact_ewm{
        width: 100px;
        height:100px;
    }
    .phone{
        font-size: 60px;
    }
    .webchat{
        font-size: 20px;
    }
    .case_tit_box{
        padding:20px;
        opacity: 1;
    }
    .case_sorttit{
        display: none;
    }
    .case_tit {
        font-size: 18px;
        font-weight: bold;
    }
    .case_subtit{
        font-size: 12px;
    }
    .case_content dl dt{
        height:400px;
    }
    .case_content dl dd{
        height:185px;
    }
    .case_content dl dt, 
    .case_content dl dd{
        margin-bottom: 30px;
    }
    .footer{
        height:500px;
    }
    .footer_con .right{
       align-items: flex-start;
       justify-content: center;
    }
    .footer_con .center .phone{
        font-size: 48px;
    }
    .footer_con .right .text {
        width: 140px;
        text-align: center;
    }
}
@media (max-width:768px){
    /* .phone_show{
        display: block !important;
    }
    .non-phone_show{
        display: none !important;
    } */
    .foot_logo {
        width: 120px;
    }
    .contact_ewm {
        width: 80px;
        height: 80px;
    }
    .phone {
        font-size: 48px;
    }
    .footer{
        padding:30px 3.5% 50px;
    }
    .footer_con{
        flex-direction: column;
    }
    .footer_con .left{
        width:100%;
        height:auto;
        margin-bottom: 20px;
    }
    .footer_con .center{
        width:100%;
        height:auto;
    }
}
@media (max-width:640px){
    .footer {
        padding: 50px 2%;
    }
    .foot_logo {
        width: 100px;
    }
    .contact_ewm {
        width: 64px;
        height: 64px;
    }
    .phone {
        font-size: 40px;
    }
    .webchat {
        font-size: 18px;
    }
    .case_content dl dt, 
    .case_content dl dd{
        width: 100%;
        margin-right: 0;
    }
}
@media (max-width:480px){
    .phone {
        font-size: 30px;
    }
    .footer{
        /* height:200px; */
    }

    .case_content dl dt {
        height: 660px;
    }
    .case_content dl dd{
        height:320px;
    }
    .footer_con .left .cn{
        font-size: 24px;
    }
    .footer_con .center .phone{
        font-size: 32px;
    }
}
@media (max-width:440px){
    .foot_logo{
        display: none;
    }
    .webchat {
        font-size: 16px;
    }
    .case_content dl dt{
        height:600px;
    }
    .case_content dl dd{
        height:285px;
    }
}
@media (max-width:375px){
    .case_content dl dt {
        height: 520px;
    }
    .case_content dl dd{
        height:250px;
    }
}