.dblmdiv {
    width: 75rem;
    max-width: 75rem; 
    height: 16.625rem;
    margin: 0 auto; 
    padding: 0 0; /* 核心：padding 设置为 0 0 */
    display: flex;
    flex-direction: row; 
    justify-content: space-between; 
    align-items: stretch; 
    margin-bottom: 4rem;
}

/* 子容器 */
.dblmdiv .item {
    width: 24.0625rem;
    height: 100%;
    position: relative; 
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0; 
    border-radius: 0.5rem; 
    overflow: hidden;
}

/* 图片样式 */
.dblmdiv .item img {
    width: 24.0625rem;
    height: 15.9375rem;
    display: block;
    flex-shrink: 0; 
    object-fit: cover;
}

/* 悬浮文字样式 */
.dblmdiv .item h3,
.dblmdiv .item p {
    position: absolute;
    left: 1rem; 
    color: #ffffff; 
    text-align: left; 
    width: calc(100% - 2rem); 
    padding: 0;
    text-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.8); 
}

.dblmdiv .item h3 {
    bottom: 1.5rem; 
    font-size: 1.5rem;
    font-family: rz;
}

.dblmdiv .item p {
    bottom: 0.5rem; 
    font-size: 1rem;
}

/* ================= 响应式媒体查询 ================= */

/* 大屏适配 */
@media (min-width: 75rem) {
    .dblmdiv {
        width: 75rem; 
    }
}

/* 中屏适配 */
@media (max-width: 50.75rem) {
    .dblmdiv {
        width: 100%;
        padding: 0 1rem;
        height: auto; 
        flex-wrap: wrap; 
        gap: 1rem; 
        justify-content: center;
    }

    .dblmdiv .item {
        width: 48%; 
        height: auto; 
        flex-shrink: 1; 
    }

    .dblmdiv .item img {
        width: 100%;
        height: 100%;
    }
}

/* 小屏适配（手机端） */
@media (max-width: 40rem) {
    .dblmdiv {
        width: 100%;
        padding: 0 0; /* 手机端同样保持 padding 为 0 */
        height: 10rem; 
        gap: 0.5rem; 
        flex-wrap: nowrap; 
        justify-content: flex-start; 
        margin-bottom: 1rem;
    }

    .dblmdiv .item {
        width: calc((100% - 1rem) / 3); 
        height: 10rem; 
        flex-shrink: 0; 
    }

    .dblmdiv .item img {
        width: 100%;
        height: 10rem; 
    }

    /* 核心：在手机尺寸下隐藏文字 */
    .dblmdiv .item h3,
    .dblmdiv .item p {
        display: none;
    }

    /* 手机端替换图片源 */
    .dblmdiv .item:nth-child(1) img {
        content: url('/material/2025gb/images/06phgqlogo.png');
    }
    .dblmdiv .item:nth-child(2) img {
        content: url('/material/2025gb/images/06phfflogo.png');
    }
    .dblmdiv .item:nth-child(3) img {
        content: url('/material/2025gb/images/06phhslogo.png'); 
    }
}