.sec1 {
    padding: 100px 0 200px;
    background: #FAFDFE;
}

.sec1 .wrap .sec1_top {
    margin-bottom: 80px;
}

.sec1 .wrap .sec1_top .little_title {
    color: #1685B8;
    font-size: 14px;
    font-weight: 600;
}

.sec1 .wrap .sec1_top .title {
    color: #000;
    font-size: 36px;
    font-weight: 600;
    margin: 12px 0;
}

.sec1 .wrap .sec1_top .des {
    color: #62748E;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.875;
}

.sec1 .wrap .list {
    display: flex;
    justify-content: space-between;
}

.sec1 .wrap .list .item {
    width: 260px;
    height: 500px;
    border-radius: 15px;
    overflow: hidden;
    position: relative;
    transition: 1s;
}

.sec1 .wrap .list .item .item_title {
    position: absolute;
    z-index: 4;
    color: #FFF;
    font-size: 24px;
    font-weight: 600;
    line-height: 1.33333;
    width: 100%;
    padding: 0 30px;
    left: 0;
    bottom: 30px;
    white-space: nowrap;
    transition: 0.2s;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sec1 .wrap .list .item .item_box {
    position: absolute;
    z-index: 4;
    width: 504px;
    padding: 30px;
    left: 0;
    bottom: 0;
    opacity: 0;
    transition: 0.6s;
}

.sec1 .wrap .list .item .item_box .h5 {
    color: #FFF;
    font-size: 18px;
    font-weight: 600;
}

.sec1 .wrap .list .item .item_box .p {
    margin: 20px 0 0;
    color: #FFF;
    font-size: 16px;
    font-weight: 400;
    line-height: 1.875;
}

.sec1 .wrap .list .item:after {
    content: "";
    width: 100%;
    height: 100%;
    position: absolute;
    z-index: 2;
    top: 0;
    left: 0;
    background: linear-gradient(180deg, rgba(22, 133, 184, 0) 0%, #1685B8 100%);
}

.sec1 .wrap .list .item .img {
    width: 577px;
    height: 100%;
}

.sec1 .wrap .list .item .img img {
    display: block;
    width: 100%;
    height: 100%;
}

.sec1 .wrap .list .item:hover .item_title {
    opacity: 0;
}

.sec1 .wrap .list .item:hover .item_box {
    opacity: 1;
}

.sec1 .wrap .list .item.on {
    width: 577px;
}

@media screen and (max-width: 1600px) {
    .sec1 .wrap .list .item {
        width: 15vw;
    }
    .sec1 .wrap .list .item.on {
        width: 40vw;
    }
    .sec1 .wrap .list .item .img {
        width: 40vw;
    }
}

@media screen and (max-width: 1366px) {
    .sec1 .wrap .sec1_top .little_title {
        font-size: 15px;
    }
    .sec1 .wrap .sec1_top .title {
        font-size: 28px;
        margin: 15px 0;
    }
    .sec1 .wrap .sec1_top .des {
        font-size: 15px;
    }
    .sec1 .wrap .list .item.on {
        width: 40vw;
    }
    .sec1 .wrap .list .item {
        width: 15vw;
        height: 34vw;
    }
    .sec1 .wrap .list .item .img {
        width: 40vw;
    }
    .sec1 .wrap .list .item .item_title {
        font-size: 18px;
        padding: 0 15px;
        bottom: 20px;
    }
    .sec1 .wrap .list .item .item_box {
        width: 40vw;
    }
    .sec1 .wrap .list .item .item_box .h5 {
        font-size: 18px;
    }
    .sec1 .wrap .list .item .item_box .p {
        font-size: 15px;
        margin: 15px 0 0;
    }
}


@media screen and (max-width: 768px) {
    .sec1 {
        padding: 50px 0;
    }
    .sec1 .wrap .sec1_top .little_title {
        font-size: 15px;
    }
    .sec1 .wrap .sec1_top .title {
        font-size: 22px;
        margin: 10px 0 25px;
    }
    .sec1 .wrap .sec1_top {
        margin-bottom: 30px;
        text-align: center;
    }
    .sec1 .wrap .list {
        gap: 20px;
        flex-wrap: wrap;
    }
    .sec1 .wrap .list .item {
        width: 100% !important;
        height: unset;
        min-height: 70vw;
        border-radius: 12px;
    }
    .sec1 .wrap .list .item .img {
        width: 100%;
        position: absolute;
        top: 0;
    }
    .sec1 .wrap .sec1_top .des {
        font-size: 15px;
    }
    .sec1 .wrap .list .item .item_title {
        display: none;
    }
    .sec1 .wrap .list .item .item_box {
        opacity: 1 !important;
        width: 100%;
        padding: 15px;
        text-align: center;
        position: relative;
        z-index: 3;

    }
    .sec1 .wrap .list .item .item_box .h5 {
        font-size: 16px;
        margin-bottom: 10px;
    }
    .sec1 .wrap .list .item .item_box .p {
        font-size: 13px;
        line-height: 1.7;
    }
}