main {
    width: 70%;
    margin: 0 auto;
}

main h4 {
    text-align: center;
    padding: 4% 0;
    font-size: 50px;
}

.ma-big-box {
    display: flex;
    justify-content: space-between;
    position: relative;
    padding: 2% 0;
    gap: 20px;
}

.ma-ri {
    width: 22%;
    max-height: 500px;
    position: sticky;
    top: 20px;
}

.tit {
    color: #817187;
    padding: 0 0 2%;
    border-bottom: 1px solid gray;
    margin-bottom: 2%;
}

.ma-ce {
    width: 90%;
    margin: 0 auto;
    padding: 1.7%;
    display: flex;
    flex-direction: column;
}

.ma-ce>.img-box {
    border-radius: 10px;
    overflow: hidden;
}

.ma-ce>.img-box::before {
    padding-top: 56%;
}

.ma-ce>p {
    margin-bottom: 2%;
    font-size: 20px;
    line-height: 1.2;
    line-height: 38px;
}

@media (max-width:999px) {
    main {
        width: 98%;
    }

    main h4 {
        font-size: 30px;
        padding: 10% 0;
    }

    .ma-big-box {
        flex-direction: column-reverse;
    }

    .ma-ri {
        position: static;
    }

    .ma-lf {
        display: none;
    }

    .ma-big-box>div {
        width: 100%;
    }

    .ma-ce {
        gap: 0;
    }

    .ma-ce>p {
        line-height: 28px;
        margin-bottom: 3%;
    }
}