.all {
  background: -webkit-gradient(linear, left top, left bottom, from(#EFF3F9), to(rgba(0, 0, 0, 0)));
  background: linear-gradient(#EFF3F9, rgba(0, 0, 0, 0));
}
.all .top {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.all .l {
  width: 66%;
  position: relative;
  height: 0;
  padding-bottom: 32%;
  overflow: hidden;
  display: block;
  -webkit-transition: 0.5s;
  transition: 0.5s;
}
.all .l img {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  -o-object-fit: cover;
     object-fit: cover;
}
.all .l:hover img {
  -webkit-transform: scale(1.05);
      -ms-transform: scale(1.05);
          transform: scale(1.05);
}
.all .r {
  width: calc(34% - 35px);
  position: relative;
  height: 0;
  padding-bottom: 32%;
  overflow: hidden;
  display: block;
  -webkit-transition: 0.5s;
  transition: 0.5s;
}
.all .r img {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  -o-object-fit: cover;
     object-fit: cover;
}
.all .r:hover img {
  -webkit-transform: scale(1.05);
      -ms-transform: scale(1.05);
          transform: scale(1.05);
}
.all .r .txt {
  line-height: 1.875;
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(31, 57, 151, 0.8);
  color: #fff;
  padding: 20% 10%;
}
.all .r .txt>div{
    width: 100%;
    height: 100%;
    overflow: auto;
    padding-right: 5px;
}
.all .r .txt>div::-webkit-scrollbar {
    width: 2px;
    border-radius: 4px;
}
.all .r .txt>div::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.02); 
    /* 背景色 */
    border-radius: 4px;
}
.all .r .txt>div::-webkit-scrollbar-thumb {
  background: #fff;
  /* 滚动色 */
  border-radius: 6px;
}
.all .btm {
  margin-top: 35px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
.all .btm > div {
  width: calc((100% - 70px) / 3);
}
.all .img {
  position: relative;
  height: 0;
  padding-bottom: 56%;
  overflow: hidden;
  display: block;
  -webkit-transition: 0.5s;
  transition: 0.5s;
}
.all .img img {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  margin: auto;
  -webkit-transition: all 0.5s;
  transition: all 0.5s;
  -o-object-fit: cover;
     object-fit: cover;
}
.all .img:hover img {
  -webkit-transform: scale(1.05);
      -ms-transform: scale(1.05);
          transform: scale(1.05);
}
@media screen and (max-width: 1700px){
    .all .r {
    width: calc(34% - 20px);
    }
    .all .btm {
    margin-top: 20px;
    }
    .all .btm > div {
    width: calc((100% - 40px) / 3);
    }
}
@media screen and (max-width: 1200px){
    .all .r .txt{
        padding: 10%;
    }
}
@media screen and (max-width: 768px){
    .all .top{
        flex-direction: column;
    }
    .all .l{
        width: 100%;
            padding-bottom: 56%;
    }
    .all .r{
        width: 100%;
        margin-top: 15px;
        height: auto;
        padding-bottom: 0;
    }
    .all .r .txt{
        position: relative;
        padding: 30px 5%;
    }
    .all .btm{
        margin-top: 0px;
        flex-direction: column;
    }
    .all .btm>div{
        width: 100%;
        margin-top: 15px;
    }
}