/* <!-- 遇到的挑战 --> */
.challenge {
    padding-top: 3.5vw;
    padding-bottom: 1.567vw;
}

.challenge .challenge_list {
    margin-top: 2.1vw;
    display: flex;
    justify-content: center;
    gap: 2vw;
}

.challenge .challenge_list .challenge_item {
    position: relative;
    width: 15.5vw;
    padding-top: 1.667vw;
}

.challenge .challenge_list .challenge_item .challenge_item_img {
    width: 3.125vw;
    height: 3.125vw;
    background-size: 100% 100%;
    margin: 0 auto;
}

.challenge .challenge_list .challenge_item .challenge_item_content {
    margin-top: 0.78vw;
    text-align: center;
}

.challenge .challenge_list[type="1"] .challenge_item:nth-of-type(1) .challenge_item_img {
    background-image: url(/images/transfer/module1_1.png);
}
.challenge .challenge_list[type="1"] .challenge_item:nth-of-type(2) .challenge_item_img {
    background-image: url(/images/transfer/module1_2.png);
}
.challenge .challenge_list[type="1"] .challenge_item:nth-of-type(3) .challenge_item_img {
    background-image: url(/images/transfer/module1_3.png);
}


.challenge .challenge_list[type="2"] .challenge_item:nth-of-type(1) .challenge_item_img {
    background-image: url(/images/maintenance/module1_1.png);
}
.challenge .challenge_list[type="2"] .challenge_item:nth-of-type(2) .challenge_item_img {
    background-image: url(/images/maintenance/module1_2.png);
}
.challenge .challenge_list[type="2"] .challenge_item:nth-of-type(3) .challenge_item_img {
    background-image: url(/images/maintenance/module1_3.png);
}

@media screen and (max-width: 905px) {
    .challenge {
        padding: 10vw 5.33vw 6vw;
    }

    .challenge .challenge_list {
        margin-top: 6vw;
        flex-direction: column;
        gap: 3.2vw;
    }

    .challenge .challenge_list .challenge_item {
        width: 100%;
        padding: 4.26vw 4.8vw;
        border-radius: 3.2vw;
        background-color: #f7f8fa;
        display: flex;
        align-items: center;
    }

    .challenge .challenge_list .challenge_item .challenge_item_img {
        width: 10.67vw;
        height: 10.67vw;
        margin: 0;
        flex-shrink: 0;
        background-repeat: no-repeat;
    }

    .challenge .challenge_list .challenge_item .challenge_item_content {
        margin-top: 0;
        margin-left: 3.2vw;
        text-align: left;
        font-size: 3.733vw;
        line-height: 1.6;
    }
}