.banner {
  width: 100%;
  height: 360px;
}
.banner img {
  width: 100%;
  height: 100%;
  display: block;
}
.banner-tab {
  width: 1200px;
  margin: 0 auto;
  position: relative;
}
.tab-nav {
  display: flex;
  align-items: center;
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  height: 70px;
}
.tab-nav-item {
  flex: 1;
  cursor: pointer;
  line-height: 70px;
  background: #f7f7f7;
  font-weight: 400;
  font-size: 18px;
  color: #222222;
  text-align: center;
}
.tab-nav-item.active {
  background: #ff4b91;
  color: #ffffff;
}
.tab-pane {
  display: none;
}
.tab-pane-title {
  font-weight: 500;
  font-size: 32px;
  color: #ff4b91;
  text-align: center;
  padding: 60px 0 50px;
}
.tab-pane-item {
  display: flex;
}
.tab-pane-item-left {
  width: 486px;
  height: 365px;
  margin-right: 24px;
}
.tab-pane-item-desc {
  font-weight: 400;
  font-size: 16px;
  color: #666666;
  line-height: 28px;
  margin-bottom: 24px;
}
.tab-pane.active {
  display: block;
  animation: fadeIn 0.3s ease-in-out;
}
.tab-content {
  width: 1200px;
  margin: 0 auto;
  padding-bottom: 100px;
}
/* 淡入动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}