@keyframes pulsate-bck {
    0% {
      -webkit-transform: scale(1);
              transform: scale(1);
    }
    50% {
      -webkit-transform: scale(0.9);
              transform: scale(0.9);
    }
    100% {
      -webkit-transform: scale(1);
              transform: scale(1);
    }
  }

.main_one {
    width: 100%;
    height: 620px;
}

.left_box {
    width: 614px;
    font-family: PingFang-SC-Medium, PingFang-SC;
    font-weight: 500;
    color: #4A4A4A;
    margin-top: 280px;
    white-space: nowrap;
}

.left_box div:nth-child(1) {
    height: 84px;
    line-height: 84px;
    font-size: 28px;
    font-family: PingFang-SC-Heavy, PingFang-SC;
    font-weight: 800;
    color: #188AFF;
    animation: tracking-in-expand 0.7s cubic-bezier(0.215, 0.610, 0.355, 1.000) both;
}

.left_box div:nth-child(2) {
    animation: tracking-in-expand 0.7s cubic-bezier(0.215, 0.610, 0.355, 1.000) both;
    font-size: 24px;
    margin-bottom: 10px;
}

.left_box div:nth-child(3) {
    font-size: 22px;
    line-height: 46px;
    animation: tracking-in-expand 0.7s cubic-bezier(0.215, 0.610, 0.355, 1.000) both;
}

.input {
    position: relative;
}

.input input {
    width: 522px;
    height: 60px;
    line-height: 60px;
    background: #FFFFFF;
    padding-left: 23px;
    box-sizing: border-box;
    border-radius: 30px 0 0 30px;
}

.input img {
    position: absolute;
    top: 0;
    right: -50px;
    width: 138px;
    height: 60px;
}

.right_box {
    width: 920px;
    margin-top: 214px;
}

.right_box img{
    width: 100%;
}

.main_two {
    text-align: center;
    font-size: 24px;
    height: 415px;
    font-family: PingFang-SC-Heavy, PingFang-SC;
    font-weight: 800;
    color: #4A4A4A;
}

.main_two .title1 {
    font-size: 26px;
    margin-top: 43px;
    line-height: 84px;
    margin-bottom: 30px;
}

/* .main_two .title2 {
    line-height: 84px;
    margin-bottom: 30px;
} */

.main_two .title2 span {
    color: #188AFF;
    margin-bottom: 30px;
}

.main_two .scroll_box {
    position: relative;
    z-index: 2;
}




.scroll_boxes {
    display: flex;
}

.scroll_boxes li {
    flex: 20%;
    height: 578px;
    background: #93CBFF;
    font-size: 48px;
    font-family: SourceHanSansCN-Heavy, SourceHanSansCN;
    font-weight: 800;
    color: #FFFFFF;
    display: flex;
    align-items: center
}

.scroll_boxes li span {
    display: inline-block;
    word-wrap: break-word;
    width: 51px;
    margin: 0 auto;
}

.main_two .scroll_boxes li:first-child {
    border-radius: 60px 0 0 60px;
}

.main_two .scroll_boxes li:last-child {
    border-radius: 0 60px 60px 0;
}

.flip-card {
    background-color: transparent;
    flex: 20%;
    height: 420px;
    perspective: 1000px;
    font-family: sans-serif;
}

.title {
    font-size: 1.5em;
    font-weight: 900;
    text-align: center;
    margin: 0;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

.flip-card-front,
.flip-card-back {
    font-size: 24px;
    position: absolute;
    display: flex;
    flex-direction: column;
    justify-content: center;
    width: 100%;
    height: 100%;
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    border-radius: 1rem;
}

.flip-card-front {
    background: #188AFF;
    color: #FFFFFF;
    border: 1px solid #FFFFFF;
}

.flip-card-front p {
    display: inline-block;
    word-wrap: break-word;
    width: 21px;
    margin: 0 auto;
}

.flip-card-front .act {
    width: 240px!important;
}

.flip-card-back {
    background: #93CBFF;
    color: white;
    border: 1px solid #188AFF;
    transform: rotateY(180deg);
}

.flip-card-back div:nth-child(1) {
    margin: 40px 0 20px;
    font-size: 24px;
    font-family: SourceHanSansCN-Heavy, SourceHanSansCN;
    font-weight: 800;
    color: #FFFFFF;
}

.flip-card-back div:nth-child(2) img {
    width: 60%;
}

.flip-card-back div:nth-child(3) {
    margin: 0 auto;
    max-width: 240px;
    text-align: left;
    line-height: 18px;
    font-size: 14px;
    font-family: PingFang-SC-Medium, PingFang-SC;
    font-weight: 400;
    color: #FFFFFF;
    margin: 20px 0 15px;
    padding: 0 15px;
    box-sizing: border-box;
}

.flip-card-back div:nth-child(4){
    width: 80%;
    height: 50px;
    line-height: 50px;
    background-image: url('../static/btn2.png');
    background-size: 100% 100%;
    margin: 0 auto;
    color: #FFFFFF;
    font-size: 16px;
}

.main_two .scroll_box li {
    cursor: pointer;
    width: 220px;
    height: 578px;
    background: #93CBFF;
    border: 2px solid #FFFFFF;
    font-size: 48px;
    font-family: SourceHanSansCN-Heavy, SourceHanSansCN;
    font-weight: 800;
    color: #FFFFFF;
    display: flex;
    align-items: center
}

.main_two .scroll_box li:first-child {
    border-radius: 60px 0 0 60px;
}

.main_two .scroll_box li:last-child {
    border-radius: 0 60px 60px 0;
}

.main_two .scroll_box li span {
    display: inline-block;
    word-wrap: break-word;
    width: 51px;
    margin: 0 auto;
}

.main_two .scroll_box .act {
    background: #FFFFFF;
    color: #188AFF;
    border-top: 2px solid #93CBFF;
    border-bottom: 2px solid #93CBFF;
    box-sizing: border-box;
}

.loops {
    width: 520px;
    height: 582px;
    background: #188AFF;
    background-size: 100% 100%;
}

.loops div:nth-child(1) {
    margin: 40px 0 20px;
    font-size: 48px;
    font-family: SourceHanSansCN-Heavy, SourceHanSansCN;
    font-weight: 800;
    color: #FFFFFF;
}

.loops div:nth-child(2) img {
    width: 200px;
    height: 200px;
}

.loops div:nth-child(3) {
    margin: 0 auto;
    width: 368px;
    text-align: left;
    line-height: 33px;
    font-size: 19px;
    font-family: PingFang-SC-Medium, PingFang-SC;
    font-weight: 500;
    color: #FFFFFF;
    margin-bottom: 15px;
    margin-top: 20px;
}

.main_three {
    padding-top: 80px;
    box-sizing: border-box;
    width: 100%;
    height: 800px;
}

.main_three .introduce {
    text-align: center;
    font-size: 26px;
    font-family: PingFang-SC-Heavy, PingFang-SC;
    font-weight: 800;
    color: #4A4A4A;
    line-height: 84px;
}

.main_three .introduce_desc {
    text-align: center;
    line-height: 34px;
    width: 864px;
    height: 100px;
    font-size: 24px;
    font-family: PingFang-SC-Medium, PingFang-SC;
    font-weight: 500;
    color: #777777;
    margin: 0 auto;
}

.main_three ul {
    justify-content: space-between;
    margin-bottom: 15px;
}

.main_three ul li {
    width: 432px;
    text-align: center;
}

.main_three ul li div:nth-child(1) img {
    width: 150px;
    height: 150px;
    animation: pulsate-bck 0.5s ease-in-out infinite both;
}

.main_three ul li div:nth-child(2) {
    font-size: 24px;
    font-family: SourceHanSansCN-Heavy, SourceHanSansCN;
    font-weight: 800;
    color: #4A4A4A;
    margin: 18px 0 20px;
}

.main_three ul li div:nth-child(3) {
    height: 50px;
    font-size: 20px;
    font-family: PingFang-SC-Heavy, PingFang-SC;
    font-weight: 800;
    color: #4A4A4A;
    margin-bottom: 5px;
    white-space: nowrap;
}

.main_three ul li div:nth-child(4) {
    height: 50px;
    font-size: 22px;
    font-family: PingFang-SC-Medium, PingFang-SC;
    font-weight: 500;
    color: #777777;
    white-space: nowrap;
}