.trade-container {
  width: 100%;
  overflow-x: hidden;
}

.section {
  width: 100%;
  position: relative;
  box-sizing: border-box;
}

/* section-KV */
.section-KV {
  height: 26.4vw;
  background-image: url(https://files.yidatec.com/img/pc/trade/kv_bg.png);
  background-size: 100% 100%;
  background-repeat: no-repeat;
  padding: 8.85vw 0 0 6.7vw;
}

.section-KV .section-title {
  color: #fff;
  display: flex;
  align-items: center;
}

.section-KV .section-title-en {
  font-size: 2.65vw;
  font-weight: bolder;
  padding-right: 1vw;
}

.section-KV .section-title-cn {
  font-size: 2.4vw;
  padding-left: 1vw;
  position: relative;
}

.section-KV .section-title-cn::before {
  display: block;
  content: '';
  width: 1px;
  height: 2vw;
  background-color: #fff;
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
}

.section-KV .section-SUBtitle {
  font-size: 1.98vw;
  font-weight: lighter;
  color: #fff;
  margin-top: 2.6vw;
}

/* section-1 */
.section-1 {
  height: 50vw;
  padding: 5.2vw;
  box-sizing: border-box;
}

.section-1 .section-content {
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(2, 1fr);
  grid-row-gap: 1.3vw;
  grid-column-gap: 1.3vw;
  grid-auto-flow: row dense;
  justify-items: stretch;
  align-items: stretch;
}

.section-1 .section-content-item {
  position: relative;
  border-radius: 0.26vw;
  overflow: hidden;
  cursor: pointer;
  background-color: #eee;
}

.section-1 .section-content-item-bg {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 1;
  transition: all 0.4s linear;
}

.section-1 .section-content-item-bg-actived {
  width: 100%;
  height: 100%;
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;
  position: absolute;
  top: 0;
  left: 0;
  opacity: 0;
  transition: all 0.4s linear;
}

.section-1 .section-content-item.item1 {
  grid-column: 1 / span 2;
}

.section-1 .section-content-item.item2 {
  grid-column: 3 / span 1;
  grid-row: 1 / span 2;
}

.section-1 .section-content-item-main {
  width: 100%;
  height: 100%;
  padding: 1.56vw;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  position: relative;
  color: #fff;
  box-sizing: border-box;
}

.section-1 .section-content-item-main-header {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-bottom: 0;
  border-bottom: none;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  transition: top 0.4s linear, left 0.4s linear;
}

.section-1 .section-content-item-main-icon {
  width: 4vw;
  height: 4vw;
  flex-shrink: 0;
  transition: all 0.4s linear;
}

.section-1 .section-content-item-main-title {
  font-size: 1.97vw;
  line-height: 1.6;
  text-align: center;
  margin-left: 0;
  margin-top: 1.56vw;
  transition: all 0.4s linear;
}

.section-1 .section-content-item-main-desc {
  font-size: 0.9vw;
  font-weight: lighter;
  line-height: 1.8;
  margin-top: 1vw;
  opacity: 0;
  height: 0;
  transform: translateY(1vw);
  transition: all 0.1s linear;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 7;
  -webkit-box-orient: vertical;
}
.section-content-item-main-desc-more{
  font-size: 0.9vw;
  font-weight: lighter;
  line-height: 1.8;
  margin-top: 1vw;
  opacity: 0;
  height: 0;
  transform: translateY(1vw);
  transition: all 0.1s linear;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 16 !important;
  -webkit-box-orient: vertical;
}
.section-content-item-main-desc-min{
  font-size: 0.9vw;
  font-weight: lighter;
  line-height: 1.8;
  margin-top: 1vw;
  opacity: 0;
  height: 0;
  transform: translateY(1vw);
  transition: all 0.1s linear;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 6 !important;
  -webkit-box-orient: vertical;
}
.section-1 .section-content-item-main-enter {
  width: 2.3vw;
  height: 2.3vw;
  position: absolute;
  top: 1.56vw;
  right: 1.56vw;
  opacity: 0;
  transform: translateY(1vw);
  transition: all 0.4s linear;
}

.section-1 .section-content-item.item2 .section-content-item-main-enter {
  top: auto;
  right: auto;
  left: 1.56vw;
  bottom: 1.56vw;
}

.section-1 .section-content-item.actived .section-content-item-bg-actived {
  opacity: 1;
}

.section-1 .section-content-item.actived .section-content-item-main-desc {
  opacity: 1;
  height: auto;
  transform: translateY(0);
  transition: all 0.2s linear 0.2s;
}

.section-1 .section-content-item.actived .section-content-item-main-enter {
  opacity: 1;
  transform: translateY(0);
  transition: all 0.2s linear 0.2s;
}

.section-1 .section-content-item.actived .section-content-item-main-header {
  width: auto;
  /* flex-direction: row;
  align-items: flex-start; */
  padding-bottom: 0.52vw;
  border-bottom: 1px solid #fff;
  left: 0;
  top: 0;
  transform: translate(0, 0);
  margin-right: auto;
}

.section-1 .section-content-item.actived .section-content-item-main-title {
  font-size: 1.5vw;
  line-height: 2vw;
  text-align: left;
  margin-top: 0;
}

.section-1 .section-content-item.actived .section-content-item-main-icon {
  width: 2vw;
  height: 2vw;
  display: none;
}