#challenge3 .n-challenge-box{
    display: grid;
    gap: 24px;
    grid-auto-flow: column; /* 自动按列排列 */
}
#challenge3 .n-challenge-content{
    text-align: center;
    padding: 20px 24px 24px;
}
#challenge3 .n-challenge-content img{
    width: 160px;
    margin-bottom: 20px;
}
#challenge3 .n-challenge-content .n-title{
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--dark-color);
    line-height: 150%;
}
#challenge3 .n-challenge-content .n-desc{
    text-align: left;
    font-size: 16px;
    color: var(--neutra-color);
    line-height: 150%;
}

@media screen and (max-width:1280px) {
    #challenge3 .n-challenge-content {
        text-align: center;
        padding: 20px 12px;
    }
    #challenge3 .n-challenge-content .n-desc{
        font-size: 14px;
    }
}
@media screen and (max-width:768px) {
    #challenge3 .n-challenge-box{
        grid-template-columns: repeat(1, 1fr);
        grid-auto-flow: unset; /* 自动按列排列 */
    }
    #challenge3 .n-challenge-content{
        padding: 14px 0px 16px;
    }
    #challenge3 .n-challenge-content img{
        width: 160px;
        margin-bottom: 30px;
    }
    #challenge3 .n-challenge-content .n-title {
        margin-bottom: 8px;
    }
}