.section4 {
        padding-top: 180px;
        display: block;
    }

    .top4 {
        position: relative;
        z-index: 2;
        display: flex;
        flex-direction: column;
        align-items: center;
        grid-gap: 15px;
    }

    .top4 .indexTitle {
        color: #fff;
    }

    .top4 p {
        text-align: center;
        color: #fff;
        font-size: 16px;
        line-height: 1.5;
        opacity: 0.8;
    }


    .Box4 {
        margin-top: 180px;
        margin-bottom: 120px;
        position: relative;
        width: 100%;
        z-index: 2;
        display: flex;
    }

    .item4 {
        width: 100%;
        position: relative;
        z-index: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        grid-gap: 20px;
    }

    .item4:nth-child(2n) {
        z-index: 2;
    }

    .item4::after {
        content: "";
        display: block;
        width: 290px;
        height: 290px;
        border-radius: 50%;
        border: 1px dashed rgba(255, 255, 255, 0.52);
        background: rgba(255, 255, 255, 0.10);
        backdrop-filter: blur(5px);
        position: absolute;
        z-index: -1;
        transition: 0.5s;
    }

    .item4:nth-child(2n)::after {
        border: 1px solid rgba(255, 255, 255, 0.52);
        backdrop-filter: blur(0px);
    }

    .item4:hover::after {
        background: var(--color);
    }

    .item4 img {
        width: 55px;
    }

    .item4 h1 {
        color: #FFF;
        text-align: center;
        font-size: 24px;
        line-height: 1.5;
    }

    .item4 h2 {
        color: #FFF;
        text-align: center;
        font-size: 16px;
        line-height: 1.5;
    }

    .bj4 {
        position: absolute;
        z-index: 1;
        width: 100%;
        height: 100%;
        top: 0;
        left: 0;
    }

    .bj4 .img4 {
        width: 100%;
        height: 100%;
        object-fit: cover;
        display: none;
    }

    .bj4 .img4.on {
        display: block;
    }

    @media (max-width: 1700px) {
        .item4::after {
            width: 260px;
            height: 260px;
        }
    }

    @media (max-width: 1440px) {
        .Box4 {
            margin-top: 120px;
            margin-bottom: 90px;
        }

        .item4 {
            grid-gap: 10px;
        }

        .item4::after {
            width: 220px;
            height: 220px;
        }

        .item4 img {
            width: 45px;
        }

        .item4 h1 {
            font-size: 22px;
        }

        .item4 h2 {
            font-size: 14px;
        }
    }

    @media (max-width: 1200px) {
        .section4 {
            padding-top: 120px;
        }

        .Box4 {
            margin-top: 60px;
            margin-bottom: 30px;
        }

        .item4 {
            grid-gap: 5px;
        }

        .item4::after {
            width: calc(15vw + 20px);
            height: calc(15vw + 20px);
        }

        .item4 h1 {
            font-size: 18px;
        }
    }

    @media (max-width: 900px) {
        .Box4 {
            display: flex;
            flex-wrap: wrap;
        }

        .item4 {
            width: 30vw;
            height: 30vw;
        }

        .item4::after {
            width: calc(100% + 20px);
            height: calc(100% + 20px);
        }
    }

    @media (max-width: 720px) {
        .section4 {
            padding-top: 45px;
        }

        .item4 img {
            width: 30px;
        }
    }

    @media (max-width: 460px) {
        .Box4 {
            margin-top: 30px;
            justify-content: center;
        }

        .item4 {
            width: 45vw;
            height: 45vw;
        }

        .item4::after {
            width: calc(100% + 10px);
            height: calc(100% + 10px);
        }
    }

    @media (max-width: 380px) {}