:root {
    --border-radius-mi: 2px;
    --transition-menu-time: 0.2s;
    --font-color-mi: #000;
}
@media handheld, only screen and (max-width: 767px) {
    #header_wrapper.shrink, #header_wrapper #header {
        height: 40px;
    }

    .mobile-show {
        display: block !important;
    }

    .mobile_hide {
        display: none !important;
    }

    #header_wrapper {
        padding-top: 0;
        height: 40px;
    }

    #nav-mobile-btn{
        display: flex;
        justify-content: flex-end;
        margin-right: 12px;
        height: 40px;
        align-items: center;
        z-index: 1001;
        position: absolute;
        width: 32px;
        right: 0;
    }

    #nav {
        left: -60%;
        display: flex;
        letter-spacing: 0.5px;
        font-weight: 600;
        position: absolute;
        width: 60%;
        min-height: 100vh;
        padding: 6px 20px;
        box-sizing: border-box;
        flex-direction: column;
        font-size: 21px;
        background-color: #fff;
        justify-content: flex-start;
        margin-left: -25%;
        text-align: left;
        line-height: 40px;
        transition: left 0.3s ease-in-out;
        z-index: 1002;
    }

    #nav li {
        margin: 5px;
    }

    #nav li a {
        font-size: 18px;
        font-weight: bold;
    }

    #mobile-products{
        border-left: 2px solid #7d7d7d;
        display: block;
    }
    #mobile-products>ul>li a{
        font-size: 14px;
        font-weight: 600;
    }
    #mobile-products>ul>li a img{
        width: 60%;
    }

    .logo-box {
        left: 0;
        line-height: 40px;
        margin: auto 0;
        height: 40px;
        position: absolute;
        width: 100%;
    }
    .logo-box img.logo{
        width: 140px;
    }

    #nav.menu-show{
        left: 0;
    }

    #header > .row {
        left: 20%;
        position: relative;
        width: 80%;
    }

    #features .row .twelvecol {
        display: block;
    }

    .company-brief .twelvecol {
        height: auto;
    }

    .twelvecol .video-box {
        width: 100%;
        position: unset;
    }

    .twelvecol .sixcol {
        width: 90%;
        position: unset;
        margin: -20px auto 0;
    }

    .twelvecol .sixcol .context {
        position: unset;
        width: 90%;
        padding: 5%;
    }

    #contact_us, #official {
        width: 100%;
    }

    #contact_us .context-box, #official .context-box {
        position: relative;
        width: 92%;
        margin: 0 auto;
    }

    #contact_us .form_right {
        padding-top: 0;
        padding-bottom: 15px;
        border-left: none;
    }

    #contact_us .form_left {
        padding-right: 0;
        padding-top: 0;
        width: 100%;
    }

    #contact_us .info_white {
        padding: 30px 0 10px 0;
    }

    .lianxi .icon {
        padding-right: 10px;
    }

    .lianxi .title {
        margin-left: 30px;
    }

    #contact_us .layui-row {
        padding-left: 0;
    }
    #contact_us #form>.layui-row:last-child{
        width: 100%;
    }
    #contact_us #form>.layui-row.mobile-show{
        font-size: 12px;
        display: flex !important;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: flex-start;
    }
    #contact_us #form>.layui-row.mobile-show .lianxi .icon{
        width: 15px;
    }

    #contact_us .form-btn-box {
        text-align: right;
    }

    #contact_us #form {
        display: flex;
        flex-direction: row-reverse;
        width: auto;
        padding:0;
    }

    #official {
        padding-top: 0;
    }

    #official .left-img-box {
        display: none;
    }

    .nine_section {
        padding: 20px 0 20px 0;
        width: 100%;
    }

    #check18{
        max-width: 80vw;
    }
    div#check18>* {
        margin-bottom: 2vw!important;
    }
}