.section4 {
    padding-bottom: 60px;
}

.box4 {
    margin-top: 60px;
    margin-left: -25px;
    margin-right: -25px;
    display: flex;
    flex-wrap: wrap;
}

.box4 .item {
    width: calc(33.333% - 50px);
    margin: 0 25px;
    position: relative;
    margin-bottom: 45px;
}

.box4 .item a {
    display: block;
    position: relative;
}

.box4 .item a .yp {
    position: relative;
    width: 100%;
    z-index: 3;
    opacity: 1;
    transition: 0.3s;
}

.box4 .item a .jq {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
    z-index: 2;
    opacity: 1;
    transition: 0.3s;
}

.box4 .item .text {
    margin: 15px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.box4 .item .text h1 {
    color: #464646;
    font-size: 22px;
    font-weight: 700;
    line-height: 1;
}

.box4 .item .text img {
    filter: brightness(0);
    opacity: 0.5;
}

.box4 .item.cur .text img {
    filter: brightness(1);
    opacity: 1;
}

.box4 .item.cur a .yp {
    opacity: 0;
}

@media (max-width: 1600px) {}

@media (max-width: 1440px) {}

@media (max-width: 1200px) {}

@media (max-width: 992px) {
    .box4 .item {
        width: calc(50% - 50px);
    }
}

@media (max-width: 640px) {
    .section4 {
        padding-bottom: 30px;
    }

    .box4 {
        margin-top: 30px;
        margin-left: -15px;
        margin-right: -15px;
    }

    .box4 .item {
        width: calc(50% - 30px);
        margin: 0 15px;
        position: relative;
        margin-bottom: 30px;
    }

    .box4 .item .text h1 {
        font-size: 18px;
        line-height: 1.5;
    }

    .box4 .item .text img {
        width: 30px;
        margin-left: 15px;
    }
}