.scrolldown {
  bottom: 300px;
}

.concept-in {
  line-height: 1.5em;
}

.bg {
  position: relative;
  width: 100%;
  height: calc(100vh - 200px);
  overflow: hidden;
}
.bg .pic {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  background-size: cover;
  background-position: center;
  -moz-transform: scale(1.1) perspective(500px) translateZ(0px);
  -ms-transform: scale(1.1) perspective(500px) translateZ(0px);
  -webkit-transform: scale(1.1) perspective(500px) translateZ(0px);
  transform: scale(1.1) perspective(500px) translateZ(0px);
  -moz-transition: -moz-transform 0s cubic-bezier(0.25, 0.25, 0.75, 0.75);
  -o-transition: -o-transform 0s cubic-bezier(0.25, 0.25, 0.75, 0.75);
  -webkit-transition: -webkit-transform 0s cubic-bezier(0.25, 0.25, 0.75, 0.75);
  transition: transform 0s cubic-bezier(0.25, 0.25, 0.75, 0.75);
}
.bg .pic.move-img {
  -moz-transform: scale(1.1) perspective(500px) translateZ(-50px);
  -ms-transform: scale(1.1) perspective(500px) translateZ(-50px);
  -webkit-transform: scale(1.1) perspective(500px) translateZ(-50px);
  transform: scale(1.1) perspective(500px) translateZ(-50px);
  -moz-transition-duration: 5s;
  -o-transition-duration: 5s;
  -webkit-transition-duration: 5s;
  transition-duration: 5s;
}
.bg .top-mask {
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.1);
  position: relative;
}

.top-title {
  position: absolute;
  left: 20%;
  top: 40%;
  color: #fff;
  z-index: 10;
}
.top-title-big, .top-title-big2 {
  font-size: 40px;
}

.level1 {
  padding: 100px 0;
}
.level1 .press {
  max-width: 1200px;
  width: 90%;
  margin: auto;
}
.level1 .press-item {
  display: inline-block;
  width: 48%;
  margin: auto;
  margin-bottom: 100px;
}
.level1 .press-item:nth-child(even) {
  float: right;
}
.level1 .press-pic {
  position: relative;
  width: 100%;
  overflow: hidden;
}
.level1 .press-pic img {
  width: 100%;
  -moz-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  -o-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  -webkit-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.level1 .press-pic .img-mask {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  background-color: transparent;
  -moz-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  -o-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  -webkit-transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
  transition: all 0.3s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.level1 .more {
  position: absolute;
  top: 50%;
  left: 50%;
  opacity: 0;
  -moz-transform: translate(-50%, 0);
  -ms-transform: translate(-50%, 0);
  -webkit-transform: translate(-50%, 0);
  transform: translate(-50%, 0);
  -moz-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  -o-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  -webkit-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.level1 a:hover .press-pic .img-mask {
  background: rgba(0, 0, 0, 0.5);
}
.level1 a:hover .press-pic img {
  -moz-transform: scale(1.1, 1.1);
  -ms-transform: scale(1.1, 1.1);
  -webkit-transform: scale(1.1, 1.1);
  transform: scale(1.1, 1.1);
}
.level1 a:hover .more {
  opacity: 1;
  -moz-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}
.level1 a:hover .press-line {
  opacity: 1;
}
.level1 .press-title {
  margin: 20px 0;
  position: relative;
}
.level1 .press-date {
  color: #bdbdbd;
  margin-bottom: 10px;
}
.level1 .press-head {
  color: #e2e2e2;
  height: 40px;
}
.level1 .press-line {
  position: absolute;
  right: 10px;
  bottom: 15px;
  opacity: 0;
  -moz-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  -o-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  -webkit-transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
  transition: all 0.5s cubic-bezier(0.165, 0.84, 0.44, 1);
}
.level1 .press-line .line-in {
  height: 1px;
  width: 12px;
  background: #e2e2e2;
}
.level1 .press-line .line-in:nth-child(2) {
  -moz-transform: rotate(-90deg);
  -ms-transform: rotate(-90deg);
  -webkit-transform: rotate(-90deg);
  transform: rotate(-90deg);
}

.press-pic {
  opacity: 0;
}
.press-pic:before {
  content: "";
  position: absolute;
  bottom: 0;
  right: 0;
  height: 100%;
  width: 100%;
  background: #404040;
  z-index: 1;
}
.press-pic.show {
  opacity: 1;
  -moz-transition: opacity 1s;
  -o-transition: opacity 1s;
  -webkit-transition: opacity 1s;
  transition: opacity 1s;
}
.press-pic.show:before {
  height: 0;
  -moz-transition: height 1s;
  -o-transition: height 1s;
  -webkit-transition: height 1s;
  transition: height 1s;
}

.press-title {
  opacity: 0;
  -moz-transform: translateY(50px);
  -ms-transform: translateY(50px);
  -webkit-transform: translateY(50px);
  transform: translateY(50px);
}

.press-title {
  -moz-transition: opacity 1s, -moz-transform 0.8s;
  -o-transition: opacity 1s, -o-transform 0.8s;
  -webkit-transition: opacity 1s, -webkit-transform 0.8s;
  transition: opacity 1s, transform 0.8s;
}
.press-title.show {
  opacity: 1;
  -moz-transform: translate(0px, 0px);
  -ms-transform: translate(0px, 0px);
  -webkit-transform: translate(0px, 0px);
  transform: translate(0px, 0px);
}

@media screen and (max-width: 1100px) {
  .level1 .press {
    width: unset;
  }
}
@media screen and (max-width: 720px) {
  .level1 {
    padding: 100px 0 0;
  }
  .level1 .press-item {
    width: 90%;
    margin: 0 auto 80px;
    display: block;
  }
  .level1 .press-item:nth-child(even) {
    float: none;
  }
  .level1 a:hover .press-line {
    opacity: 0;
  }
}
@media screen and (max-width: 460px) {
  .level1 .press-item {
    width: 100%;
  }

  .top-title {
    left: 10%;
  }
}
@media screen and (max-height: 650px) {
  .bg {
    height: calc(100vh - 50px);
  }

  .scrolldown {
    bottom: 150px;
  }
}