.top {
  position: relative;
  background: #121212;
  margin-top: -80px;
}
.top-wrap {
  display: -ms-flexbox;
  display: flex;
  -webkit-align-items: center;
  align-items: center;
}
.top-content {
  padding: 0 80px;
  width: 40%;
  box-sizing: border-box;
  opacity: 0;
  -moz-transition: opacity 0.6s 0.3s;
  -o-transition: opacity 0.6s 0.3s;
  -webkit-transition: opacity 0.6s;
  -webkit-transition-delay: 0.3s;
  transition: opacity 0.6s 0.3s;
}
.top-content.show {
  opacity: 1;
}
.top-img {
  position: relative;
  margin: 0 10% -300px auto;
  z-index: 1;
  overflow: hidden;
  box-shadow: 0 0 20px #000;
}
.top-img:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: #100f12;
  -moz-transition: width 1s;
  -o-transition: width 1s;
  -webkit-transition: width 1s;
  transition: width 1s;
}
.top-img.show:after {
  width: 0;
}
.top-img img {
  height: 600px;
}

.portfolio-title h2 {
  font-weight: 400;
  padding-left: 20px;
  border-left: #666 solid 1px;
  line-height: 25px;
  color: #FFF;
}
.portfolio-title .en {
  font-size: 1.5rem;
}
.portfolio-title .cn {
  font-size: 0.875rem;
  margin-top: 5px;
}
.portfolio-title-inner {
  overflow: hidden;
}
.portfolio-title-inner span {
  display: block;
  -moz-transform: translateY(40px);
  -ms-transform: translateY(40px);
  -webkit-transform: translateY(40px);
  transform: translateY(40px);
  -moz-transition: -moz-transform 0.6s;
  -o-transition: -o-transform 0.6s;
  -webkit-transition: -webkit-transform 0.6s;
  transition: transform 0.6s;
}
.show .portfolio-title-inner span {
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -webkit-transform: translateY(0);
  transform: translateY(0);
}
.portfolio-content {
  padding: 80px;
}
.portfolio-content:last-child {
  padding-bottom: 0;
}
.portfolio-list {
  display: -ms-flexbox;
  display: flex;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
  margin-top: 40px;
  font-size: 0.9375rem;
}
.portfolio-list li {
  position: relative;
  width: 50%;
  padding: 15px 5% 15px 20px;
  border-bottom: rgba(255, 255, 255, 0.1) solid 1px;
  box-sizing: border-box;
  opacity: 0;
  -moz-transform: translateY(40px);
  -ms-transform: translateY(40px);
  -webkit-transform: translateY(40px);
  transform: translateY(40px);
  -moz-transition: opacity 0.6s 0.3s, -moz-transform 0.6s 0.3s;
  -o-transition: opacity 0.6s 0.3s, -o-transform 0.6s 0.3s;
  -webkit-transition: opacity 0.6s, -webkit-transform 0.6s;
  -webkit-transition-delay: 0.3s, 0.3s;
  transition: opacity 0.6s 0.3s, transform 0.6s 0.3s;
}
.portfolio-list li.show {
  opacity: 1;
  -moz-transform: translateY(0);
  -ms-transform: translateY(0);
  -webkit-transform: translateY(0);
  transform: translateY(0);
}
.portfolio-list li:before {
  content: "+";
  position: absolute;
  left: 0;
  color: #cccccc;
}
.portfolio-list .en {
  color: #cccccc;
}
.portfolio-list .cn {
  display: block;
}
.portfolio-img1, .portfolio-img2, .portfolio-img5 {
  position: relative;
  overflow: hidden;
  box-shadow: 0 0 20px #000;
}
.portfolio-img1:after, .portfolio-img2:after, .portfolio-img5:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: #100f12;
  -moz-transition: width 1s;
  -o-transition: width 1s;
  -webkit-transition: width 1s;
  transition: width 1s;
}
.portfolio-img1.show:after, .portfolio-img2.show:after, .portfolio-img5.show:after {
  width: 0;
}
.portfolio-img1 img, .portfolio-img2 img, .portfolio-img5 img {
  width: 100%;
}
.portfolio-img1 {
  margin-right: 30%;
}
.portfolio-img2 {
  margin: 0 15%;
}
.portfolio-img5 {
  margin: 0 50% 0 80px;
}
.portfolio-img4, .portfolio-img6 {
  margin: 0 10% 0 50%;
  display: -ms-flexbox;
  display: flex;
  -webkit-justify-content: space-between;
  justify-content: space-between;
}
.portfolio-img4-inner, .portfolio-img6-inner {
  position: relative;
  width: 48%;
  box-shadow: 0 0 20px #000;
}
.portfolio-img4-inner:after, .portfolio-img6-inner:after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background: #100f12;
  -moz-transition: width 1s;
  -o-transition: width 1s;
  -webkit-transition: width 1s;
  transition: width 1s;
}
.show .portfolio-img4-inner:after, .show .portfolio-img6-inner:after {
  width: 0;
}
.portfolio-img4-inner:first-child, .portfolio-img6-inner:first-child {
  margin-top: 10%;
}
.portfolio-img4-inner:last-child, .portfolio-img6-inner:last-child {
  margin-bottom: 10%;
}
.portfolio-img4 img, .portfolio-img6 img {
  width: 100%;
}

@media screen and (max-width: 1400px) {
  .portfolio-img {
    width: 80%;
  }

  .portfolio-list li {
    width: 50%;
  }
}
@media screen and (max-width: 1300px) {
  .list2 li {
    width: 100%;
  }
}
@media screen and (max-width: 1100px) {
  .top {
    margin-top: -80px;
    padding-bottom: 0;
  }
  .top-img {
    width: 50%;
  }
  .top-content {
    width: 50%;
  }

  .portfolio-img {
    width: auto;
    margin: 0 80px;
  }
  .portfolio-img.img2 {
    margin-left: 80px;
  }
}
@media screen and (max-width: 960px) {
  .top {
    padding-top: 100px;
  }
  .top-wrap {
    display: block;
  }
  .top-content {
    width: auto;
    padding-top: 0;
  }
  .top-img {
    height: 50vw;
    width: auto;
    margin: 80px 0 -120px;
  }

  .portfolio-img {
    height: 50vw;
  }

  .portfolio-list li {
    width: 100%;
  }
}
@media screen and (max-width: 760px) {
  .top-img {
    margin-bottom: -80px;
  }
}
@media screen and (max-width: 640px) {
  .top-content {
    padding: 0 25px;
  }
  .top-img {
    margin: 40px 0 -60px;
  }

  .portfolio-content {
    padding: 60px 25px;
  }

  .portfolio-img {
    margin: 0 25px;
  }
  .portfolio-img.img2 {
    margin-left: 25px;
  }
}