html {font-size:10px !important;}
@media screen and (min-width:480px) and (max-width:639px) {
html {font-size: 15px !important;}
}

@media screen and (min-width:640px) and (max-width:719px) {
html {font-size: 20px !important;}
}

@media screen and (min-width:720px) and (max-width:749px) {
    html {font-size: 22.5px !important;}
}

@media screen and (min-width:750px) and (max-width:799px) {
    html {font-size: 23.5px !important;}
}

@media screen and (min-width:800px) and (max-width:959px) {
    html {font-size: 25px !important;}
}

@media screen and (min-width:960px) and (max-width:1079px) {
    html {font-size: 30px !important;}
}

@media screen and (min-width:1080px) {
    html {font-size: 32px !important;}
}
/*download css*/
.logo_download_cn{width:40%; margin-top:2em;}
.logo_download_en{width:40%; margin-top:2em;}
.download-intro-text{font-size:2em;color:#474747;}
.download-link img{width:40%;}
.download-link{margin-top:2.5em;}
.download-phone{margin-top:2.5em;margin-bottom:0;padding-bottom:0;}
.download-phone {position: relative;}
.swiper-slide>img{width: 60%;height:100%;}
.swiper-wrapper {margin-top:3em; line-height:0;}
.swiper-button-prev,
.swiper-button-next {
    position: absolute;
    top: 50%;
    width: 40px;
    height: 40px;
    margin-top: -20px;
    z-index: 10;
    cursor: pointer;
    -moz-background-size: 40px 40px;
    -webkit-background-size: 40px 40px;
    background-size: 40px 40px;
    background-position: center;
    background-repeat: no-repeat;
}
.swiper-button-prev {background-image:url('../images/download/prev.png');}
.swiper-button-next{background-image:url('../images/download/next.png');}