/* lg 大分辨率 大型设备（大台式电脑，1200px 起）*/
@media(min-width:1200px) {
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 145%;
    }
}
/*md 默认 中型设备（台式电脑，992px 起） 宽桌面*/
@media(min-width:992px) and (max-width:1199px) {
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 145%;
    }

}
/* sm 小型设备（平板电脑，768px 起）界于竖直平板与水平平板/桌面之间*/
@media(min-width:768px) and (max-width:991px) {
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 145%;
    }
}
/*xs 界于水平手机与竖直平板之间*/
@media(max-width:767px) {
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 130%;
    }
}

@media(max-width:570px){
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 110%;
        width: 100%;
        height: 100%;
    }
}


/*XS Portrait 水平状态的手机及以下*/
@media(max-width:480px){
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 110%;
        width: 100%;
        height: 100%;
    }
}


@media(max-width:360px) and (max-width:410px){
    .background_main {
        background: url(../../image/bioind/background2025.jpg) no-repeat;
        background-size: 100% 110%;
        width: 100%;
        height: 100%;
    }
}