.block3 .content {
    flex-direction: column;
    margin-top: 104px;
    box-sizing: border-box;
}

.block3 .title-common h2 {
    margin-bottom: 78px;
}

.block3 .list {
    width: 1200px;
}

.block3 .item {
    width: 100%;
    height: 480px;
    overflow: hidden;
    box-sizing: border-box;
    box-shadow: 0 4px 6px 2px rgba(0, 0, 0, 0.1);
    border-radius: 12px;
    cursor: pointer;
}

    .block3 .item img {
        width: 100%;
        height: 300px;
    }

.block3 .msg .tit {
    font-size: 24px;
    font-weight: bold;
    color: #333;
    text-align: center;
    margin-top: 28px;
}

.block3 .msg .bom {
    margin-top: 28px;
    font-size: 16px;
    color: #666;
    text-align: center;
    display: flex; /* 使用flex布局 */
    justify-content: center; /* 水平居中 */
    line-height:24px;
}
    .block3 .msg .bom .tip {
        width: 85%; /* 文字宽度80% */
        margin: auto; /* 上下自动边距，实现居中 */
    }