@media only screen and (min-width:1401px) and (max-width:1920px){  
    .sectionFirst,.sectionSecond,.sectionThird,.sectionFourth,.sectionFifth {
        transform: scale(0.9);
        transform-origin: top;
    }
    .sectionSecond,.sectionThird,.sectionFifth{
        margin-top: 0px;
    }
    .sectionFifth{
        transform: scale(1) !important;
    }
    .video{
        width: 1350px;
    }

    .tel ul:nth-child(3)>li:nth-child(1){
        margin-left: -35px;
    }
    
    .tel ul:nth-child(1){
        margin: 31px 0 0 0;
    }
    
    .tel ul:nth-child(2){
        margin: 31px 0 0 20px;
    }
    
    .tel ul:nth-child(3){
        margin: 31px 0 0 20px;
    }
}

@media only screen and (min-width:1241px) and (max-width:1400px) {
    .header {
        height: 140px;
    }

    .logo {
        width: 490px;
        height: 77px;
        top: 35px;
    }

    .navigation {
        width: 442px;
        top: 38px;
    }

    .input {
        height: 34px;
        width: 230px;
    }

    .navigation>a {
        font-size: 16px;
        margin-top: 3px;
    }

    .nav_sy {
        width: 18px;
        height: 18px;
        padding-top: 11px;
    }

    .nav {
        top: 70px;
        right: 0.6%;
    }

    .nav ul {
        width: 804px;
    }

    .nav ul li {
        width: 85px;
        height: 70px;
        line-height: 70px;
    }

    .nav ul li a {
        font-size: 16px;
    }

    .nav ul li:nth-last-child(1) {
        width: 120px;
    }

    .nav ul li:nth-last-child(1) .menu {
        left: 0%;
    }

    .menu {
        width: 120px;
        left: -20.5%;
        top: 100%;
    }

    .menu a {
        font-size: 14px !important;
        width: 120px;
        height: 40px;
        line-height: 40px;
    }
}

@media only screen and (min-width:1020px) and (max-width:1240px) {
    .header {
        height: 130px;
    }

    .logo {
        width: 445px;
        height: 70px;
        top: 30px;
    }

    .navigation {
        width: 382px;
        top: 34px;
    }

    .navigation>a {
        font-size: 14px;
    }

    .input {
        width: 200px;
        height: 30px;
        padding-top: 5px;
    }

    .nav_sy {
        width: 16px;
        height: 16px;
        padding-top: 12px;
    }

    .nav {
        right: 0.1%;
        top: 58px;
    }

    .nav ul {
        width: 696px;
    }

    .nav ul li {
        width: 73px;
        height: 72px;
        line-height: 72px;
    }

    .nav ul li a {
        font-size: 14px;
    }

    .nav ul li:nth-last-child(1) {
        width: 100px;
    }

    .menu {
        width: 110px;
        left: -25%;
        top: 100%;
    }

    .menu a {
        font-size: 12px !important;
        width: 110px;
        height: 40px;
        line-height: 40px;
    }

    .nav ul li:nth-last-child(1) .menu {
        left: -5%;
    }
}

@media only screen and (min-width:880px) and (max-width:1020px) {
    .header {
        height: 110px;
    }

    .logo {
        width: 372px;
        height: 58px;
        top: 25px;
    }

    .navigation {
        width: 318px;
        top: 22px;
    }

    .navigation>a {
        font-size: 12px;
        top: 23px;
    }

    .input {
        width: 162px;
        height: 24px;
        padding-top: 5px;
    }

    .nav_sy {
        width: 14px;
        height: 14px;
        padding-top: 10px;
    }

    .nav {
        right: 0;
        top: 40px;
    }

    .nav ul {
        width: 580px;
    }

    .nav ul li {
        width: 60px;
    }

    .nav ul li a {
        font-size: 12px;
    }

    .nav ul li:nth-last-child(1) {
        width: 90px;
    }

    .menu {
        width: 100px;
        left: -33.3%;
        top: 100%;
    }

    .menu a {
        font-size: 12px !important;
        width: 100px;
        height: 40px;
        line-height: 40px;
    }

    .nav ul li:nth-last-child(1) .menu {
        left: -5%;
    }
}

@media only screen and (max-width:880px) {
    .nav ul,
    .navigation
    {
        display: none;
    }
    
    .nav ul li:hover{
        transform: none;
    }

    .menu {
        transition: none;
        left: 0%;
        width: inherit;
        z-index: 3;
        display: none;
    }

    .nav {
        top: 0;
        right: 0;
    }

    .menu-icon {
        position: absolute;
        display: block;
        top: 70px;
        right: 26px;
        width: 30px;
        height: 20px;
        cursor: pointer;
        z-index: 1000;
    }

    .menu-icon span {
        display: block;
        position: absolute;
        height: 4px;
        width: inherit;
        background: white;
        border-radius: 4px;
        opacity: 1;
        left: 0;
        transform: rotate(0deg);
        transition: 0.25s ease-in-out;
        z-index: 10000;
    }

    .menu-icon span:nth-child(1) {
        top: 0px;
    }

    .menu-icon span:nth-child(2),
    .menu-icon span:nth-child(3) {
        top: 10px;
    }

    .menu-icon span:nth-child(4) {
        top: 20px;
    }

    .nav.open .menu-icon span:nth-child(1) {
        top: 0px;
        width: 100%;
        left: 0;
    }

    .nav.open .menu-icon span:nth-child(2) {
        top: 10px;
        width: 100%;
        left: 0;
    }

    .nav.open .menu-icon span:nth-child(3) {
        top: 10px;
        width: 100%;
        left: 0;
    }

    .nav.open .menu-icon span:nth-child(4) {
        top: 20px;
        width: 100%;
        left: 0;
    }

    /* 展开菜单时的导航栏样式 */
    .nav.open ul {
        width: 50vw;
        display: flex;
        flex-direction: column;
    }

    .nav.open {
        display: block;
    }

    .nav ul li {
        width: 100%;
        height: 10vh;
        line-height: 10vh;
    }

    .nav ul li:nth-last-child(1){
        width: 100%;
    }

    #navbarMenu {
        width: 30%;
        height: 100vh;
        flex-direction: column;
        background-color: #ffffff;
        position: absolute;
        right: 0;
        top: 0px;
        text-align: center;
    }

    #navbarMenu li a {
        text-align: center;
        width: 100%;
        display: block;
        font-size: 20px;
        color: black;
    }
}