@media screen and (min-width:640px) {
    * {
        margin: 0;
        padding: 0;
    }

    @font-face {
        font-family: PingFang;
        src: url(../css/font/苹方简体.otf);
    }

    @font-face {
        font-family: Alibaba;
        src: url(../css/font/AlibabaPuHuiTiExtraBold.otf);
    }
    @font-face {
        font-family: Alibaba;
        src: url(../css/font/AlibabaPuHuiTiRegular.otf);
    }

    @font-face {
        font-family: Alibabal;
        src: url(../css/font/AlibabaPuHuiTi-2-45-Light.otf);
    }
    @font-face {
        font-family: Alibabat;
        src: url(../css/font/AlibabaPuHuiTi-2-35-Thin.otf);
    }

    .mb_nav {
        display: none;
    }

    /* @font-face {
        font-family: SF Pro Display;
        src: url(../css/font/sf-pro-display_regular.ttf);
    } */

    html,
    body {
        width: 100%;
        /* font-family: 黑体; */
        font-family: "Alibaba","SF Pro SC", "SF Pro Display", "SF Pro Icons", "PingFang SC", "Noto Sans SC", "Helvetica Neue", "Helvetica", "Arial", sans-serif;
        color: #393939;
    }

    img {
        width: 100%;
        display: block;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    .projectMenu_d{
        position: relative;
    }
    
    .projectMenu_d:hover .projectMenu_d_son {
        display: block;
    }

    .projectMenu_d_son {
        display: none;
        /* margin-top: 0.8vh; */
        position: absolute;
        background: #fff;
        /* display: flex; */
        flex-direction: column;
        /* top: 81.5%;*/
        left: 50%; 
        transform: translateX(-50%);
        box-shadow: 0 5px 10px rgb(0 0 0 / 20%);
        padding: 12px; 
        width: 10vw;
        height: auto;
        z-index: 5;
        text-align: center;
        border-radius: 0.4vw;
    }
    .projectMenu_d_son div{
        display: flex;
        flex-direction: column;
    }

    .projectMenu_d_son a {
        font-size: 0.6vw;
        line-height: 32px;
        color: #322e31;
        opacity: 0.6;

        /* display: block; */
    }

    .projectMenu_d_son a:hover {
        opacity: 1;
    }


    .width86 {
        width: 86%;
        margin: 0 auto;
    }

    .width92 {
        width: 92%;
        margin: 0 auto;
    }

    .all {
        width: 100%;
    }

    p {
        /* text-align: justify; */
    }
    .pc_navbb{
        width: 100%;
        /* font-size: 1.05vw; */
        /* border-bottom: 1px solid #ababab; */
        position: fixed;
        z-index: 999;
        display: block;

    }

    .pc_nav_mr{
        background-color: #fff;
        color: #000;
    }

    .pc_nav {
         
        /* background: #fff; */
        /* box-shadow: 0px 17px 25px #ffffff; */
        /* background: linear-gradient(to bottom, #000000b5, #4e393200); */
        /* color: #fff; */
        /* animation: tb 0.3s linear forwards ; */
    }
    .pc_nav_in {
        color: #fff;
        animation: tb 0.3s linear forwards ;
    }

    @keyframes tb
    {
    from {background-color: #fff;
        color: #000;}
    to {background: linear-gradient(to bottom, #000000b5, #4e393200);
        color: #fff;}
    }
    
    /*Safari 和 Chrome:*/
    @-webkit-keyframes  tb

    {
        from {background-color: #fff;
            color: #fff;}
        to {background: linear-gradient(to bottom, #000000b5, #4e393200);
            color: #000;}
        }

    .pc_nav_w {
       
        /* background: #fff; */
        /* box-shadow: 0px 17px 25px #ffffff; */
        /* background-color: #fff; */
        color: #000;
        animation: tw 0.3s linear forwards ;
    }

    @keyframes tw
    {
    from {background: linear-gradient(to bottom, #000000b5, #4e393200);
        color: #fff;}
    to {background-color: #fff;
        color: #000;}
    }
    
    /*Safari 和 Chrome:*/
    @-webkit-keyframes  tw

    {
        from {background: linear-gradient(to bottom, #000000b5, #4e393200);
            color: #fff;}
        to {background-color: #fff;
            color: #000;}
    }

    .logo_w{
        filter: brightness(0) invert(1);
    } 

    .pc_navBox {
        width: 92%;
        /* padding: 1.5% 0; */
        margin: 0 auto;
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 5em;
    }

    .pc_navLeft div {
        width: 43%;
    }

    .pc_navRight {
        /* width: 46%; */
        display: flex;
        justify-content: space-between;
        text-align: center;
        /* font-weight: bold; */
        line-height: 1.1rem;
    }

    .pc_navRight div {
        cursor: pointer;
    }

    .pc_nav_about,
    .pc_nav_project,
    .pc_nav_news,
    .pc_nav_contact {
        font-size: 16px;
    }

 .nobody {
        /* overflow-y: hidden; */
        overflow-x: hidden;
    }   

    .pc_navRight_item {
        padding: 3.5% 0;
        /* padding: 1.5% 1.9rem; */
        /* width: 2.5em; */
        width: 6.7rem;
        font-size: 1rem;
        font-family: "Alibaba";
    }

    .pc_navRight_item:hover .pc_navRight_item_f{
        
        animation: op07 0.7s linear forwards ;
    }

    @keyframes op07
    {
    from {opacity: 1;}
    to {opacity: 0.4;}
    }
    
    /*Safari 和 Chrome:*/
    @-webkit-keyframes  op07

    {
        from {opacity: 1;}
    to {opacity: 0.4;}
    }

    .pc_navRight_item_bottom:hover {
        animation: op07 0.7s linear forwards ;
    }

    .pc_navRight_item:last-child {
        display: flex; 
        align-items: center;
        justify-content: flex-end;
    }

    .pc_navRight_item_top {
        width: 37%;
        display: none;
    }

    .pc_nav_about {
        position: relative;
    }

    .pc_nav_about:hover .pc_nav_about_son {
        display: block;
    }

    .pc_nav_about_son {
        position: absolute;
        background: #fff;
        /* display: flex;
        flex-direction: column; */
        top: 81.5%;
        left: 50%;
    transform: translateX(-50%);
        box-shadow: 0 5px 10px rgb(0 0 0 / 20%);
        padding: 12px;
        display: none;
        /* width: 5vw; */
        height: auto;
        z-index: 5;
        text-align: center;
    }

    .pc_nav_about_son a {
        font-size: 15px;
        line-height: 32px;
        color: #322e31;
        opacity: 0.6;

        /* display: block; */
    }

    .pc_nav_about_son a:hover {
        opacity: 1;
    }

    
    .pc_nav_project_son{
        position: absolute;
    background: #fff;
    top: 81.5%;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 5px 10px rgb(0 0 0 / 20%);
    padding: 12px;
    display: none;
    width: 157px;
    height: auto;
    z-index: 5;
    text-align: center;
    }

    .pc_nav_project_son a {
        font-size: 15px;
        line-height: 32px;
        color: #322e31;
        opacity: 0.6;

        /* display: block; */
    }
    .pc_nav_project_son a:hover {
        opacity: 1;
    }
 .pc_nav_project{
    position: relative;
 }
 .pc_nav_project:hover .pc_nav_project_son {
    display: block;
}


    .pc_nav_contact {
        position: relative;
    }

    .pc_nav_contact:hover .pc_nav_contact_son {
        display: block;
    }

    .pc_nav_contact_son {
        position: absolute;
    background: #fff;
    top: 81.5%;
    left: 50%;
    transform: translateX(-50%);
    box-shadow: 0 5px 10px rgb(0 0 0 / 20%);
    padding: 12px;
    display: none;
    width: 68px;
    height: auto;
    z-index: 5;
    text-align: center;
    }

    .pc_nav_contact_son a {
        font-size: 15px;
        line-height: 32px;
        color: #322e31;
        opacity: 0.6;

        /* display: block; */
    }

    .pc_nav_contact_son a:hover {
        opacity: 1;
    }
}

@media screen and (max-width:640px) {
    .swiper-slide_m{
        overflow: hidden;
    }
    .swiper-slide_m img{
        width: 160vw;
        transform: translateX(-50%);
        position: relative;
        left: 50%;
    }

    .pc_associates_pic{
        margin: 7vw 0; 
    }
    * {
        margin: 0;
        padding: 0;
    }

    @font-face {
        font-family: PingFang;
        src: url(../css/苹方简体.otf);
    }

    .pc_nav {
        display: none;
    }

    html,
    body {
        width: 100%;
        /* font-family: 黑体; */
        /* font-family: "PingFang"; */
        
        font-family: "Alibaba";
        color: #393939;
        -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
        font-family:-apple-system,'HelveticaNeue';

    }

    img {
        width: 100%;
        display: block;
    }

    a {
        color: inherit;
        text-decoration: none;
    }

    p {
        /* text-align: justify; */
    }

    .pc_associates_txtCn_title{
        font-size: 22px;
    margin: 4vw 0;
    font-weight: bold;
    }
    .width86 {
        width: 92%;
        margin: 0 auto;
    }

    .width92 {
        width: 92%;
        margin: 0 auto;
    }

    .all {
        width: 100%;
    }

    .mb_nav {
        width: 100%;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 999;
        background: #fff;
        /* border-bottom: solid 0.2vw #969696; */
    }

    .mb_navBox {
        margin: 5% 0;
    }

    .mb_navInnerBox {
        display: flex;
        justify-content: space-between;
        align-items: center;
    }

    .mb_navLeft {
        width: 52%;
        margin-right: 17%;
    }

    .mb_navMiddle1 {
        width: 4%;
		margin-left: 7%;
    }

    .mb_navMiddle2 {
        font-size: 2vw;
		margin-right: 5%;
    }

    .mb_navRight {
        width: 5%;
        
    }

    .mb_subBox {
        background-color: rgba(255, 255, 255, 0.9);
        width: 100%;
        display: none;
        position: absolute;
        padding-bottom: 10%;
        box-shadow: 0 5px 10px rgb(0 0 0 / 20%);
    }

    .mb_subto {
        /* position: absolute; */
        /* right: 6%; */
        text-align: right;
        font-weight: bold;
    }

    .mb_sub_item {
        font-size: 4vw;
        position: relative;
        margin: 9% 0;
    }

    .mb_sub_item_son {
        position: absolute;
        right: 15%;
        top: 22%;
        display: flex;
        font-weight: normal;
        font-size: 3vw;
        width: 70%;
        justify-content: flex-end;
        text-align: left;
    }

    .mb_sub_item_son1 {
        margin: 0 5%;
    }

    .mb_nav_about {
        padding-top: 5%;
    }

    .mb_navLine {
        border-bottom: 0.2vw solid;
    }
}