.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: #568faf 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: #568faf 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;
}