.card,
.card-dark {
  padding: 80px 0;
}
.card .card-title,
.card-dark .card-title {
  font-size: 32px;
  font-weight: 600;
  color: #333;
  line-height: 60px;
  text-align: center;
}
.about_megvii-history .swiper-slide {
  overflow: hidden;
  height: 520px;
}
.about_megvii-history {
  padding-bottom: 100px;
}

.about_megvii-history .card-title {
  color: #fff;
  z-index: 1;
  position: relative;
}

.about_megvii-history .swiper-slide .years {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 55px;
  padding: 0 46px;
}

.about_megvii-history .swiper-slide .years span {
  font-size: 60px;
  font-weight: bolder;
  color: rgba(255, 255, 255, 0.5);
  line-height: 84px;
  flex: 1;
  cursor: pointer;
}

.about_megvii-history
  .swiper-pagination
  .swiper-pagination-bullet
  span.end
  span,
.about_megvii-history .swiper-slide .years span.end span {
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: rgba(255, 255, 255, 0.5);
  border-radius: 100%;
  position: relative;
  top: -12px;
}

.about_megvii-history .swiper-slide .years span.end span:after,
.about_megvii-history .swiper-slide .years span.end span:before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  background-color: rgba(255, 255, 255, 0.5);
  border-radius: 100%;
}

.about_megvii-history .swiper-slide .years span.end span:before {
  left: -15px;
}

.about_megvii-history .swiper-slide .years span.end span:after {
  left: -30px;
}

.about_megvii-history .swiper-slide .years span:nth-child(2) {
  color: #fff;
  text-align: center;
  cursor: auto;
  font-size: 80px;
  line-height: 112px;
}

.about_megvii-history .swiper-slide .years span:last-child {
  text-align: right;
}

.about_megvii-history .swiper-slide .animate {
  position: absolute;
  left: 0;
  right: 0;
  margin: auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  bottom: 0;
}

.about_megvii-history .swiper-slide .animate .line {
  width: 2px;
  height: 20px;
  margin-bottom: 8px;
  background-color: #fff;
  -webkit-animation: animate_line 3s 0.3s linear both infinite;
  animation: animate_line 3s 0.3s linear both infinite;
}

.about_megvii-history .swiper-slide:last-child .years span:last-child {
  cursor: auto;
}

.swiper-pagination-clickable .swiper-pagination-bullet.about_megvii-more {
  cursor: default;
  font-size: 40px !important;
}

.swiper-pagination-clickable .swiper-pagination-bullet.about_megvii-more:hover {
  color: rgba(255, 255, 255, 0.4) !important;
}

.about_megvii-history .swiper-slide .animate .text {
  font-size: 12px;
  color: #fff;
  line-height: 17px;
}

.about_megvii-history .swiper-slide {
  overflow: hidden;
  height: 520px;
}

.about_megvii-history .swiper-slide .main {
  height: 268px;
  overflow-y: scroll;
  overflow-x: hidden;
  margin-top: 20px;
  position: absolute;
  left: -20px;
  right: -20px;
}

.about_megvii-history .swiper-slide .content {
  font-size: 16px;
  color: #fff;
  line-height: 22px;
  margin-top: 20px;
  width: 490px;
  position: relative;
  left: 50%;
}

.about_megvii-history .swiper-slide .content .event {
  padding-bottom: 35px;
  position: relative;
  padding-left: 20px;
}

.about_megvii-history .swiper-slide .content .desc {
  line-height: 28px;
  font-size: 16px;
}

.about_megvii-history .swiper-slide .content .event .month {
  font-size: 20px;
  font-weight: bolder;
  color: #fff;
  line-height: 28px;
  margin-right: 10px;
  position: absolute;
  left: -20px;
  transform: translateX(-100%);
  top: -5px;
}

.about_megvii-history .swiper-slide .content .event .line {
  width: 7px;
  height: 7px;
  background: #fff;
  border-radius: 100%;
  display: inline-block;
  margin-right: 16px;
  position: absolute;
  top: 6px;
  left: -4px;
}

.about_megvii-history .swiper-slide .content .event:after {
  content: "";
  position: absolute;
  top: 11px;
  left: -1px;
  bottom: -11px;
  width: 1px;
  background-color: #fff;
  text-align: right;
}

.about_megvii-history .swiper-slide .content .event:last-child:after {
  display: none;
}

.about_megvii-history .swiper-pagination {
  bottom: 40px;
}

.about_megvii-history .swiper-pagination .swiper-pagination-bullet {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.4);
  line-height: 28px;
  margin-right: 64px;
  width: auto;
  height: auto;
  opacity: 1;
  background: 0 0;
  transform: scale(1);
}

.about_megvii-history .swiper-pagination .swiper-pagination-bullet-active {
  color: #fff;
  position: relative;
}

.about_megvii-history
  .swiper-pagination
  .swiper-pagination-bullet-active:after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #fff;
  bottom: 0;
}

.about_megvii-history .parallax-bg {
  background-image: url(../img/history_bg.0e315e13.jpg);
  background-repeat: no-repeat;
  position: absolute;
  left: 0;
  top: 0;
  width: 130%;
  height: 100%;
  background-size: cover;
  background-position: center;
}

.about_megvii-history .swiper-button-next,
.about_megvii-history .swiper-button-prev {
  background: 0 0;
  width: 200px;
  height: 84px;
  top: 194px;
  margin: 0;
}

.about_megvii-history .swiper-button-prev {
  left: 0;
}

.about_megvii-history .swiper-button-next {
  right: 0;
}