/* Section4 */
    .section4 {
        display: block;
        padding: 0;
        position: relative;
    }

    .section4 .indexTitle {
        position: absolute;
        z-index: 3;
        left: var(--container);
        top: 120px;
        max-width: 900px;
    }

    .Box4 {
        display: block;
        position: absolute;
        left: 0;
        bottom: 0;
        width: 100%;
        z-index: 2;
        background: rgba(0, 62, 152, 0.80);
        padding: 60px var(--container);
        display: grid;
        grid-template-columns: repeat(7, 1fr);
        grid-gap: 15px 30px;
    }

    .list4 {
        color: #fff;
        font-size: 20px;
        padding-bottom: 15px;
        border-bottom: 1px solid #fff;
        opacity: 0.5;
    }

    .list4.on {
        opacity: 1;
    }

    .bj4 {
        position: relative;
        z-index: 1;
        width: 100%;

    }

    .img4 {
        width: 100%;
        min-height: 600px;
        object-fit: cover;
        display: none;
    }

    .img4.on {
        display: block;
    }

    @media (max-width: 1600px) {
        .list4 {
            font-size: 16px;
        }
    }

    @media (max-width: 1440px) {
        .section4 .indexTitle {
            top: 60px;
        }

        .Box4 {
            grid-gap: 15px 20px;
            padding: 30px var(--container);
        }
    }

    @media (max-width: 1200px) {
        .Box4 {
            grid-template-columns: repeat(5, 1fr);
        }


    }

    @media (max-width: 900px) {
        .section4 .indexTitle {
            position: unset;
            padding: 0 var(--container);
        }

        .bj4 {
            margin-top: 30px;
        }

        .bj4 img {
            min-height: unset;
        }

        .Box4 {
            position: unset;
            grid-template-columns: repeat(4, 1fr);
            grid-gap: 10px 20px;
        }

        .list4 {
            padding-bottom: 10px;
        }
    }

    @media (max-width: 600px) {
        .Box4 {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (max-width: 400px) {
        .Box4 {
            grid-gap: 10px;
        }

        .list4 {
            font-size: 14px;
        }
    }