.coway-ro-tech,
.coway-ro-tech * {
    box-sizing: border-box;
}

.coway-ro-tech {
    width: 100%;
    max-width: 1200px;
    margin: 60px auto;
    padding: 0 18px;
    font-family: Arial, "Noto Sans KR", sans-serif;
    color: #252b31;
}

/* 제목 */
.coway-ro-tech__title {
    margin: 0 auto 34px;
    padding: 0;
    text-align: center;
    font-size: 34px;
    line-height: 1.45;
    font-weight: 700;
    letter-spacing: -0.8px;
    color: #222a31;
}

/* 필터 이미지 */
.coway-ro-tech__image {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto 30px;
    text-align: center;
}

    .coway-ro-tech__image img {
        display: block;
        width: 100%;
        height: auto;
        margin: 0 auto;
        border: 0;
    }

/* 4개 카드 */
.coway-ro-tech__cards {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
}

.coway-ro-tech__card {
    overflow: hidden;
    background: #fff;
    border: 1px solid #d8e0e5;
    border-radius: 14px;
    box-shadow: 0 5px 15px rgba(30, 50, 65, 0.10);
    text-align: center;
}

    /* 카드 상단 - 살짝 어두운 블루 */
    .coway-ro-tech__card h3 {
        display: flex;
        align-items: center;
        justify-content: center;
        min-height: 58px;
        margin: 0;
        padding: 10px 12px;
        background: #487d98;
        color: #fff;
        font-size: 18px;
        line-height: 1.35;
        font-weight: 700;
    }

/* 카드 본문 */
.coway-ro-tech__card-content {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 128px;
    padding: 20px 17px;
}

    .coway-ro-tech__card-content p {
        margin: 0;
        padding: 0;
        font-size: 15px;
        line-height: 1.7;
        font-weight: 400;
        color: #303840;
    }

/* 하단 부연설명 */
.coway-ro-tech__notes {
    width: 100%;
    max-width: 1100px;
    margin: 28px auto 0;
    padding: 18px 20px;
    background: #f4f6f7;
    border-radius: 10px;
}

    .coway-ro-tech__notes p {
        margin: 5px 0;
        padding: 0;
        font-size: 13px;
        line-height: 1.65;
        font-weight: 600;
        color: #30363b;
    }


/* ==============================
   태블릿
============================== */

@media (max-width: 991px) {

    .coway-ro-tech__title {
        font-size: 29px;
    }

    .coway-ro-tech__cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 13px;
    }
}


/* ==============================
   모바일
============================== */

@media (max-width: 575px) {

    .coway-ro-tech {
        margin: 38px auto;
        padding: 0 12px;
    }

    .coway-ro-tech__title {
        margin-bottom: 23px;
        font-size: 23px;
        line-height: 1.5;
        letter-spacing: -0.5px;
    }

    .coway-ro-tech__image {
        margin-bottom: 21px;
    }

        .coway-ro-tech__image img {
            width: 100%;
            height: auto;
        }

    /* 모바일에서도 2 × 2 */
    .coway-ro-tech__cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
    }

    .coway-ro-tech__card {
        border-radius: 11px;
    }

        .coway-ro-tech__card h3 {
            min-height: 52px;
            padding: 8px 6px;
            font-size: 14px;
            line-height: 1.35;
        }

    .coway-ro-tech__card-content {
        min-height: 125px;
        padding: 14px 9px;
    }

        .coway-ro-tech__card-content p {
            font-size: 12px;
            line-height: 1.6;
        }

    .coway-ro-tech__notes {
        margin-top: 20px;
        padding: 14px 13px;
        border-radius: 8px;
    }

        .coway-ro-tech__notes p {
            margin: 4px 0;
            font-size: 11px;
            line-height: 1.6;
            font-weight: 600;
            color: #292f34;
        }
}