.about_box .about_left {
  float: left;
  width: 260px;
  margin: 20px 0;
}

.about_box .about_left > h3 {
  background: var(--color-primary);
  color: #fff;
  padding: 12px;
}

.about_box .about_left>ul {}

.about_box .about_left>ul>li {
  border: 1px solid #e2e2e2;
  margin: 5px 0;
  position: relative;
}

.about_box .about_left>ul>li:hover {
  background: var(--color-primary);
}

.about_box .about_left>ul>li:hover::after,
.about_box .about_left>ul>li:hover a{
  color: #fff;
}

.about_box .about_left>ul>li::after {
    font-family: "qico";
    content: "\e62e";
    position: absolute;
    right: 10px;
    top: 0;
    font-size: 18px;
    font-weight: normal;
    line-height: 42px;
}

.about_box .about_left>ul>li h5 {
  line-height: 22px;
  display: block;
  padding: 12px 0 12px 13px;
  font-size: 15px;
  color: #555;
  cursor: pointer;
  position: relative;
}

.about_box .about_left>ul>li h5 a {
  display: block;
  margin-right: 40px;
  box-sizing: border-box;
}

/* .about_box .about_left>ul>li h5 a:hover {
  color: var(--color-primary);
  text-decoration: underline;
} */

.about_box .about_left>ul>li h5 span {
  position: absolute;
  right: 0;
  top: 0;
  background: url("./pics/i4.png") no-repeat center;
  width: 40px;
  height: 45px;
  display: block;
  text-align: center;
}

.about_box .about_left>ul>li h5 span i {
  line-height: 40px;
  font-size: 18px;
  font-weight: 500;
}

.about_box .about_left>ul>li ul {
  display: none;
}

.about_box .about_left>ul>li ul li {
  line-height: 18px;
  border-bottom: 1px dashed #DCDCDC;
  background: #fff;
  padding: 8px 13px;
}

.about_box .about_left>ul>li ul li:last-child {
  border-bottom: none;
}

.about_box .about_left>ul>li ul li a {
  padding-left: 15px;
  font-size: 13px;
  color: #484848;
  display: block;
}

.about_box .about_left>ul>li ul li.active a,
.about_box .about_left>ul>li ul li a:hover {
  color: var(--color-primary);
  background: url("./pics/dot3.png") no-repeat left 9px;
}

.about_box .about_left>ul>li.active>h5 {
  color: var(--color-primary);
  border-bottom: 1px solid #e2e2e2;
}

.about_box .about_left>ul>li.active>h5 span {
  background: url("./pics/i4-1.png") no-repeat center;
}

.about_box .about_left>ul>li ul li.active>h5 {
  color: var(--color-primary);
  border-bottom: 1px solid #e2e2e2;
}

.about_box .about_left>ul>li ul li.active>h5 span {
  background: url("./pics/i4-1.png") no-repeat center;
}

.about_box .about_left .business {}

.about_box .about_left .business .bus_top {
  background: var(--color-primary);
  color: #fff;
  border-radius: 5px;
  padding: 20px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.about_box .about_left .business .bus_top h3 {
  display: block;
  padding-left: 0;
  color: #fff;
}

.about_box .about_left .business .bus_top h3::after {
  display: none;
}

.about_box .about_left .business .bus_top p {
  opacity: .7;
  margin-bottom: 20px;
}

.about_box .about_left .business .bus_top a {
  font-size: 13px;
  white-space: nowrap;
}

.about_box .about_left .business .bus_top a:hover {
  color: #fff;
  text-decoration: underline;
}

.about_box .about_left .business .bus_bottom {
  background: #f5f5f5;
  padding: 20px;
  margin-top: 20px;
  border-radius: 5px;
}

.about_box .about_left .business .bus_bottom .busBot_top {
  display: flex;
  align-items: center;
}

.about_box .about_left .business .bus_bottom .busBot_foot {
  margin-top: 20px;
}

.about_box .about_left .business .bus_bottom .busBot_foot img {
  width: 100%;
}

.about_box .about_left .business .bus_bottom .left {}

.about_box .about_left .business .bus_bottom .left {
  width: 30%;
}

.about_box .about_left .business .bus_bottom .left img {
  border-radius: 100%;
  aspect-ratio: 1/1;
  object-fit: cover;
  width: 100%;
}

.about_box .about_left .business .bus_bottom .right {
  padding-left: 10px;
}

.about_box .about_left .business .bus_bottom .right .name {
  color: var(--color-primary);
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}

.about_box .about_left .business .bus_bottom .right a {
  border: 1px solid var(--color-primary);
  padding: 5px;
  border-radius: 5px;
  color: var(--color-primary);
}

.about_box .about_right {
  margin-left: 340px;
  min-height: 1100px;
}

@media screen and (max-width: 1330px) {
  .about_box .about_left {
    width: 260px;
  }

  .about_box .about_right {
    margin-left: 290px;
  }
}

@media screen and (max-width: 768px) {
  .about_box .about_left {
    width: 100%;
    float: none;
  }

  .about_box .about_right {
    margin-left: 0px;
    min-height: 0px;
  }
}




.ytht-history-main {
  padding-top: 90px;
  padding-bottom: 60px;
}

.history h3 {
  font-size: 30px;
  color: #333;
  text-align: center;
  font-weight: bold;
}

.history .list {
  position: relative;
  width: 100%;
  margin: 40px 0 0 0;
  box-sizing: border-box;
}

.history .item {
  position: relative;
  width: 100%;
  padding: 15px 0;
  box-sizing: border-box;
  max-height: 200px;
}

.history .item::after {
  display: block;
  content: " ";
  clear: both;
}

.history .item::before {
  content: "";
  position: absolute;
  width: 1px;
  top: 0;
  bottom: 0;
  left: 50%;
  background-color: #dfdfdf;
  height: 100%;
}

.history .item .content {
  float: left;
  position: relative;
  margin: 0;
  width: calc(50% - 62px);
  padding: 30px;
  border: 1px solid #dfdfdf;
  box-sizing: border-box;
  border-radius: 10px;
  transition: all .5s;
}

.history .item:hover .content {
    background: var(--color-primary);
}

.history .item:hover .content p {
    color: #fff;
}

.history .item .content::before {
  content: "";
  position: absolute;
  width: 63px;
  height: 9px;
  top: 39px;
  right: -64px;
  background: url(./pics/ibg5.png) no-repeat;
}

.history .item .content p {
  font-size: 17px;
  color: #555;
  line-height: 24px;
}

.history .item .content p ~ p {
  margin-top: 10px;
}

.history .item .date {
  position: absolute;
  left: calc(50% + 62px);
  top: 63px;
  border-radius: 30px;
  width: 150px;
  height: 36px;
  line-height: 36px;
  background: var(--color-primary);
  text-align: center;
  box-sizing: border-box;
  text-align: center;
  color: #202020;
  font-size: 20px;
  color: #fff;
}

.history .item:nth-child(2n + 2) .content {
  float: right;
}

.history .item:nth-child(2n + 2) .content::before {
  right: auto;
  left: -63px;
  background: url(./pics/ibg6.png) no-repeat;
}

.history .item:nth-child(2n + 2) .date {
  left: auto;
  right: calc(50% + 62px);
}

@media screen and (max-width: 992px) {
  .main {
    padding-top: 25px;
    padding-bottom: 30px;
  }

  .history .list {
    margin: 30px 0 0 0;
  }

  .history .item {
    padding: 20px 0;
  }

  .history .item::before {
    left: 10px;
  }

  .history .item .content {
    float: none;
    width: 100%;
    padding: 15px 0 0 30px;
    border: none;
  }

  .history .item .content::before {
    display: none;
  }

  .history .item .content p {
    font-size: 16px;
    line-height: 22px;
  }

  .history .item .date {
    margin: 0 0 0 30px;
    position: static;
    left: auto;
    top: auto;
    border-radius: 30px;
    width: 130px;
    height: 32px;
    line-height: 32px;
    font-size: 18px;
    position: relative;
  }

  .history .item .date::before {
    content: "";
    position: absolute;
    width: 62px;
    height: 9px;
    top: 12px;
    left: -24px;
    background: url(../images/ibg6.png) no-repeat;
    z-index: -1;
  }

  .history .item:nth-child(2n + 2) .content {
    float: none;
  }

  .history .item:nth-child(2n + 2) .date {
    right: auto;
  }
}