.picture-group{
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.picture-group-box{
    display: flex;
    gap: 20px;
}
.picture-group-box-one{
    position: relative;
    width: 640px;
    height: 640px;
    flex-shrink: 0;
    overflow: hidden;
    cursor: pointer;
}
.picture-group-box-two{
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.picture-group-box-two-box{
    position: relative;
    width: 640px;
    height: 309px;
    overflow: hidden;
    cursor: pointer;
}
.two-box-img{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 640px;
    height: 309px;
}
.one-box-img{
    position: absolute;
    bottom: 0;
    left: 0;
    width: 640px;
    height: 640px;
}
.mask-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    opacity: 0;
    transition: opacity 0.3s ease;
}
/* 鼠标移入容器，显示遮罩层 */
.picture-group-box-two-box:hover .mask-layer {
    opacity: 1;
}
.picture-group-box-one:hover .mask-layer {
    opacity: 1;
}
.bottom-box {
    position: absolute;
    bottom: 50px;
    left: 26px;
    width: 100%;
    font-size: 30px;
    color: #ffffff;
    transition: all 0.4s ease;
}

.bottom-box-btn{
    width: 128px;
    height: 36px;
    background-color: #ffffff;
    border-radius: 18px;
    font-size: 16px;
    color: #000;
    text-align: center;
    line-height: 36px;
}

.picture-group-box-two-box:hover  .pub-more-btn-1 {
    background: #a84523 url(../assets/jiantou-fff-2.png) no-repeat 100px center;
    background-size: auto 10px;
    color: #fff;
}
.picture-group-box-one:hover  .pub-more-btn-1 {
    background: #a84523 url(../assets/jiantou-fff-2.png) no-repeat 100px center;
    background-size: auto 10px;
    color: #fff;
}

.picture-group-box-two-box:hover .bottom-box {
    bottom: 50%;
    transform: translateY(65%);
    opacity: 1;
}
.picture-group-box-one:hover .bottom-box {
    bottom: 50%;
    transform: translateY(65%);
    opacity: 1;
}