@media screen and (max-width: 1600px) {

    .container, .topic{
        width: 90%;
    }

    .topic {
        top: 10%;
        font-size: 18px;
    }

    .topic span {
        font-size: 20px;
        border-radius: 20px 0;
    }

    .topic h1 {
        font-size: 30px;
    }

    .tab div {
        font-size: 16px;
    }

    .tab div ul li {
        margin: 5px 8px;
    }

    .app li .img {
        height: 180px;
    }

    .app li span {
        margin: 0 10px 10px 0;
    }

    .detail {
        padding: 24px 30px;
    }

    .detail .txt h1 {
        font-size: 26px;
    }

    .detail .txt p {
        line-height: 1.5em;
    }

    .detail .txt h2 {
        font-size: 18px;
    }

    .detail .txt h3 a {
        height: 50px;
    }

    .intro > h2 {
        margin: 1em 0;
    }

    .relative h2 {
        font-size: 22px;
        margin: 1em 0;
    }

    .relative .swiper-slide .img {
        height: 180px;
    }

}

@media screen and (max-width: 1200px) {

    .topic {
        font-size: 16px;
    }

    .topic span {
        font-size: 18px;
    }

    .topic h1 {
        font-size: 22px;
    }

    .topic h2 {
        font-size: 24px;
        background-size: contain;
    }

    .tab, .detail {
        margin-top: -50px;
        padding: 20px;
    }

    .tab div {
        font-size: 14px;
    }

    .tab div span {
        line-height: 30px;
    }

    .tab div ul li {
        padding: 5px 15px;
        margin: 5px;
    }

    .app {
        margin: 10px -10px;
    }

    .app li {
        width: calc(33.33% - 20px);
        margin: 10px;
        padding: 15px;
    }

    .app li h2 {
        font-size: 20px;
    }

    .app li .img {
        height: 160px;
    }

    .app li p {
        font-size: 14px;
        height: 3em;
        line-height: 1.5em;
        margin-bottom: 1em;
    }

    .app li span {
        font-size: 12px;
        margin: 0 5px 5px 0;
    }

    .footer {
        margin-top: 30px;
        padding-top: 30px;
    }

    .footer .flex > div {
        width: 30%;
    }

    .footer .flex > div:first-of-type {
        display: none;
    }

    .footer .flex > div:nth-of-type(2) {
        width: 40%;
    }

    .detail .txt h1 {
        font-size: 22px;
    }

    .detail .txt p {
        font-size: 14px;
    }

    .detail .txt h2 {
        font-size: 16px;
    }

    .detail .txt div {
        margin: 5px -5px;
    }

    .detail .txt div span {
        padding: 3px 6px;
        margin: 5px;
    }

    .detail .txt h3 a {
        font-size: 16px;
        height: 40px;
    }

    .detail .txt h3 a img {
        height: 18px;
    }

    .relative .swiper-slide .img {
        height: 160px;
    }

    .relative .swiper-slide h2 {
        font-size: 18px;
    }

    .relative .swiper-slide p {
        font-size: 14px;
        height: 4.5em;
        line-height: 1.5em;
    }


}

@media screen and (max-width: 768px) {

    .header{
        height: 60px;
    }

    .header .logo img{
        height: 30px;
    }

    .header .top a {
        font-size: 16px;
        margin-left: 1.5em;
    }

    .topic {
        font-size: 16px;
    }

    .topic span {
        font-size: 16px;
    }

    .topic h1 {
        font-size: 18px;
    }

    .topic p {
        margin: 0.5em 0 1.5em;
    }

    .topic h2 {
        font-size: 20px;
        padding-left: 35px;
    }

    .tab, .detail {
        margin-top: -25px;
        padding: 15px;
    }

    .app li {
        width: calc(50% - 20px);
    }

    .detail .txt h3 a {
        font-size: 14px;
        padding: 0 10px;
        height: 35px;
    }

    .detail .txt h3 a img {
        height: 16px;
        margin-right: 6px;
    }

    .intro > h2 {
        font-size: 16px;
        white-space: nowrap;
        overflow: scroll;
    }

    .intro > h2 span {
        padding: 7px 20px;
    }

}

@media screen and (max-width: 600px) {

    .container, .topic{
        width: 100%;
        padding: 0 15px;
        box-sizing: border-box;
    }

    .header .top {
        text-align: right;
    }

    .header .top a {
        font-size: 14px;
        margin-left: 0.5em;
    }

    .header .top img {
        height: 14px;
        margin-right: 5px;
    }

    #slide img{
        height: 160px;
    }

    .topic span {
        font-size: 12px;
    }

    .topic h1 {
        font-size: 16px;
    }

    .topic p {
        margin: 0.5em 0;
        font-size: 12px;
    }

    .topic h2 {
        font-size: 18px;
        padding-left: 30px;
    }

    .topic a {
        padding: 5px 15px;
    }

    .tab, .detail {
        margin-top: 20px;
        padding: 15px;
    }

    .tab div {
        position: relative;
        height: 40px;
        overflow: hidden;
        transition: .5s;
    }

    .tab div i{
        position: absolute;
        top: 12px;
        right: 0;
        width: 15px;
        height: 14px;
        background: url("../images/up.png") no-repeat;
        background-size: cover;
        transform: rotate(180deg);
        transition: .3s;
    }
    .tab div i.on{
        transform: rotate(0);
    }

    .app li {
        width: calc(100% - 20px);
    }

    .app li h2 {
        font-size: 18px;
    }

    .app li .img, .relative .swiper-slide .img {
        height: 48vw;
    }

    .footer {
        margin-top: 20px;
        padding-top: 20px;
    }

    .footer .flex > div {
        display: none;
    }

    .footer .flex > div:nth-of-type(2) {
        display: block;
        width: 100%;
    }

    .footer h3 {
        margin-bottom: 10px;
    }

    .footer p {
        line-height: 1.5em;
    }

    .footer .copyright {
        font-size: 13px;
        padding: 15px 0 20px;
    }

    .detail .flex{
        flex-wrap: wrap;
    }

    .detail .img, .detail .txt {
        width: 100%;
    }

    .detail .txt h1 {
        font-size: 20px;
        margin-top: 0.8em;
    }

    .relative h2 {
        font-size: 20px;
    }

    aside > div {
        width: 50px;
        padding: 1em 0;
    }

}