.nankandai-box {
max-width: 1000px; /* 横幅 */
 background: #b9d8f2;
 padding: 5px;
  margin: 30px auto; /* 中央配置 */
 }

.nankandai-box__inner {
    border: 4px solid #ffffff;
    padding: 30px;
    background: #fff;
}


.nankandai-box__title {
    color: #0070c9;
    font-size: 28px;
    font-weight: bold;
    margin: 0 0 20px;
    line-height: 1.2;
    text-align: center;
}

.nankandai-box__body {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.nankandai-box__image {
    flex-shrink: 0;
}

.nankandai-box__image img {
    width: 180px;
    height: auto;
    display: block;
}


.nankandai-box__lead {
 color: #000000;
 font-size: 25px;
 font-weight: bold;
 margin-bottom: 15px;
 }
.nankandai-box__notice {
 color: #ff3300;
 font-size: 24px;
 font-weight: bold;
 margin: 20px 0 0;
 }

@media screen and (max-width: 768px) {

    .nankandai-box__body {
        flex-direction: column;
    }

    .nankandai-box__image {
        width: 100%;
        text-align: center;
    }

    .nankandai-box__image img {
        width: 100%;
        max-width: 250px;
        display: block;
        margin: 0 auto;
    }

    .nankandai-box__title {
        font-size: 28px;
        text-align: left;
    }

    .nankandai-box__notice {
        font-size: 20px;
    }
}