.app-upgrade {
    width: 100%;
}


.app-upgrade {
    position: relative;
}

.app-upgrade .app-upgrade-content > .content-item {
    display: none;
}

.app-upgrade .app-upgrade-content > .active {
    display: block !important;
}

.app-upgrade .app-upgrade-content > .content-item > .brief-image > img {
    width: 100%;
    height: auto;
}

.app-upgrade .app-upgrade-content > .content-item> .brief-background-image > img {
    width: 100%;
    height: 100%;
    position: absolute;
    right: 0;
    bottom: 0;
    z-index: -1;
}

@media (min-width: 768px) {
    .app-upgrade {
        height: 454px;
    }

    .app-upgrade > .app-upgrade-swiper {
        width: 1200px;
        margin: 0 auto;
        display: flex;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav {
        padding-top: 64px;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .nav-item {
        width: 210px;
        height: 72px;
        border-radius: 0px 4px 4px 0px;
        font-size: 18px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 600;
        color: #FFFFFF;
        line-height: 64px;
        padding: 0 0 0 32px;
        cursor: pointer;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .active {
        background: rgba(255, 255, 255, 0.2);
        border-left: 4px solid white;
        padding: 0 0 0 28px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image > img {
        position: absolute;
        bottom: 0;
    }

    .app-upgrade .app-upgrade-content {
        margin-left: 72px;
        padding-top: 64px;
        height: 454px;
        flex: 1;
    }

    .app-upgrade .app-upgrade-content > .content-item > h3 {
        font-size: 34px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 600;
        color: #FFFFFF;
        line-height: 72px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .biref {
        font-size: 16px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 400;
        color: #FFFFFF;
        line-height: 26px;
        letter-spacing: 1px;
        width: 453px;
        padding-top: 5px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image {
        width: 654px;
        height: 454px;
        position: absolute;
        top: 0;
        margin-left: 266px;
        overflow: hidden;
    }
    .app-upgrade .app-upgrade-content > .content-item > .brief-image > .img-mobile {
        display: none;
    }

    .app-upgrade .app-upgrade-content > .content-item> .brief-background-image > .img-mobile {
        display: none;
    }

}

@media (max-width: 768px) {
    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav {
        padding-top: 40px;
        display: flex;
        justify-content: center;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .nav-item {
        font-size: 16px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 600;
        color: #FFFFFF;
        line-height: 21px;
        margin: 0 25px;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .active {
        padding-bottom: 12px;
        border-bottom: 1px solid white;
    }

    .app-upgrade .app-upgrade-content > .content-item > h3 {
        padding-top: 32px;
        padding-bottom: 20px;
        font-size: 20px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 600;
        color: #FFFFFF;
        line-height: 28px;
        text-align: center;
    }

    .app-upgrade .app-upgrade-content > .content-item > .biref {
        padding: 0 32px;
        font-size: 13px;
        font-family: PingFangSC, PingFang SC;
        font-weight: 400;
        color: #FFFFFF;
        line-height: 23px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image > .img-pc {
        display: none;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image {
        /*height: 236px;*/
        padding: 0 32px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image>img {
        vertical-align: bottom;
    }

    .app-upgrade .app-upgrade-content > .content-item> .brief-background-image > .img-pc {
        display: none;
    }

    .app-upgrade .app-upgrade-content > .content-item> .brief-background-image {
        /*height: 236px;*/
    }

}

@media (min-width: 3840px) {
    .app-upgrade {
        height: 908px;
    }

    .app-upgrade > .app-upgrade-swiper {
        width: 2400px;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav {
        padding-top: 128px;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .nav-item {
        width: 420px;
        height: 144px;
        font-size: 36px;
        line-height: 128px;
        padding: 0 0 0 64px;
    }

    .app-upgrade > .app-upgrade-swiper > .app-upgrade-nav > .active {
        padding: 0 0 0 56px;
    }

    .app-upgrade .app-upgrade-content {
        margin-left: 144px;
        padding-top: 128px;
        height: 908px;
    }

    .app-upgrade .app-upgrade-content > .content-item > h3 {
        font-size: 68px;
        line-height: 144px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .biref {
        font-size: 32px;
        line-height: 52px;
        width: 906px;
        padding-top: 10px;
    }

    .app-upgrade .app-upgrade-content > .content-item > .brief-image {
        width: 1308px;
        height: 908px;
        margin-left: 532px;
    }
}