.unit2 {
    width: 100%;
    overflow: hidden;
    padding-top: 5vw;
    padding-bottom: 0px;
}

.content_div {
    display: flex;
    flex-wrap: wrap;
}

.content_div li {
    width: calc((100% - 60px) / 3);
    margin-right: 30px;
}

.imgBox {
    width: 42%;
    overflow: hidden;
    position: relative;
    padding-bottom: 57%;
    border-radius: 8px;
}

.imgBox img {
    width: 100%;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    height: 100%;
    object-fit: cover;
    transition: 0.6s all;
}

.tool {
    width: 58%;
    background: #fbfbfb;
    border-radius: 4px;
    padding: 2.6vw;
}

.tool h3 {
    position: relative;
    color: #000;
    font-size: 2.5rem;
        font-family: 'Montserrat-SemiBold';
    line-height: 1.2;
}

.mian_cen li:hover img{
    transform: translate(-50%, -50%) scale(1.05);
}

.content_div li:hover h3{
        color: #0075cb;
}

.mian_cen{
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

.mian_cen li{
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    width: 48%;
    position: relative;
    margin-bottom: 4.5vw;
}

.xiaBox {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-top: 2.5vw;
}

.xiaBox a {
    width: fit-content;
    display: flex;
    align-items: center;
    font-weight: 600;
    color: #00429a;
    font-size: 16px;
}

.xiaBox a span{
    position: relative;
    display: block;
    line-height: 34px;
}

.xiaBox a span:after{
    position:absolute;
    content: '';
    width: 0%;
    height: 1px;
    background: #00429a;
    left: 0;
    bottom: 0;
    transition: 0.5s;
}

.xiaBox a svg {
    height: auto;
    width: 24px;
    margin-left: 1vw;
    fill: currentColor;
}

.xiaBox a:hover span:after{
    width: 100%;
}

@media only screen and (min-width:768px) {
    .content_div li:nth-child(3n) {
        margin-right: 0;
    }
}

@media only screen and (max-width:1200px) {
    .tool h3{
        font-size: 1.5rem;
    }
}

@media only screen and (max-width:769px) {
    .mian_cen li{
        width: 100%;
        margin-bottom: 25px;
    }
    
    .unit2{
            padding-top: 45px;
    }
    
    .xiaBox a{
        font-size: 14px;
    }
}