.card {
  margin-top: 90px;
}

.w1200 {
  width: 1200px;
  margin: 0 auto;
}

.project-introduction {
  background: url("../img/roject-introduction-bj.png") no-repeat;
  background-size: 100%, 100%;
}

.project-introduction .title {
  width: 551px;
  margin: 0 auto;
}

.project-introduction .top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 60px;
  margin-bottom: 60px;
}

.project-introduction .top .left {
  width: 316px;
  flex-shrink: 0;
}

.project-introduction .top .texts {
  font-size: 16px;
  line-height: 32px;
  margin-left: 40px;
  text-align: justify;
  font-weight: 400;
}

.feature {
  padding: 70px 0;
  background-color: #4C917C;
}

.feature .title {
  width: 838px;
  margin: 0 auto;
}

.feature .pic {
  width: 1114px;
  margin: 0 auto;
  margin-top: 70px;
}

.rates .title {
  width: 570px;
  margin: 0 auto;
}

.rates .pic {
  margin-top: 70px;
}

.environment .title {
  width: 551px;
  margin: 0 auto;
}

.environment .pic {
  margin-top: 70px;
}

.recruit-student {
  background: url("../img/recruit-student-bj.png") no-repeat;
  background-size: 100% 100%;
  padding: 70px;
}

.recruit-student .title {
  width: 554px;
  margin: 0 auto;
}

.recruit-student .pic {
  width: 984px;
  margin: 0 auto;
  margin-top: 70px;
}

.recruit-student button {
  font-weight: bold;
  color: white;
  border-radius: 2rem;
  cursor: pointer;
  width: 200px;
  height: 50px;
  border: none;
  background: linear-gradient(to right, #B3E5DC, #4DB6AC);
  display: flex;
  justify-content: center;
  align-items: center;
  margin: 0 auto;
  margin-top: 70px;
}

.recruit-student button .span-mother {
  display: flex;
  overflow: hidden;
}

.recruit-student button:hover .span-mother {
  position: absolute;
}

.recruit-student button:hover .span-mother span {
  transform: translateY(1.2em);
}

.recruit-student button .span-mother span:nth-child(1) {
  transition: 0.2s;
}

.recruit-student button .span-mother span:nth-child(2) {
  transition: 0.3s;
}

.recruit-student button .span-mother span:nth-child(3) {
  transition: 0.4s;
}

.recruit-student button .span-mother span:nth-child(4) {
  transition: 0.5s;
}

.recruit-student button .span-mother span:nth-child(5) {
  transition: 0.6s;
}

.recruit-student button .span-mother span:nth-child(6) {
  transition: 0.7s;
}

.recruit-student button .span-mother2 {
  display: flex;
  position: absolute;
  overflow: hidden;
}

.recruit-student button .span-mother2 span {
  transform: translateY(-1.2em);
}

.recruit-student button:hover .span-mother2 span {
  transform: translateY(0);
}

.recruit-student button .span-mother2 span {
  transition: 0.2s;
}

.recruit-student button .span-mother2 span:nth-child(2) {
  transition: 0.3s;
}

.recruit-student button .span-mother2 span:nth-child(3) {
  transition: 0.4s;
}

.recruit-student button .span-mother2 span:nth-child(4) {
  transition: 0.5s;
}

.recruit-student button .span-mother2 span:nth-child(5) {
  transition: 0.6s;
}

.recruit-student button .span-mother2 span:nth-child(6) {
  transition: 0.7s;
}

@keyframes roll-in-blurred-bottom {
  0% {
    transform: translateY(600px) rotateX(30deg) scale(0);
    transform-origin: 50% 100%;
    opacity: 0;
  }
  100% {
    transform: translateY(0) rotateX(0) scale(1);
    transform-origin: 50% -1400px;
    opacity: 1;
  }
}

input {
  outline: none;
  border: none;
}

.changeShardBox {
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  position: fixed;
  left: 0;
  top: 0;
}

.changeShardBox > .changeShard_wrap {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: #F5F5F5;
  width: 450px;
  border-radius: 20px;
  padding-bottom: 20px;
  animation: animations .5s linear;
}

.changeShardBox > .changeShard_wrap > .tan_close {
  position: absolute;
  top: -20px;
  right: -25px;
  width: 30px;
  height: 30px;
  cursor: pointer;
}

.changeShardBox > .changeShard_wrap > h3 {
  font-size: 25px;
  text-align: center;
  margin-top: 30px;
  color: #0729AE;
}

.changeShardBox > .changeShard_wrap > .inp_box {
  width: 330px;
  margin: 0 auto;
  height: 50px;
  border: 1px solid #237aeb;
  display: flex;
  align-items: center;
  margin-top: 30px;
  padding-left: 10px;
}

.changeShardBox > .changeShard_wrap > .inp_box > img {
  width: 20px;
}

.changeShardBox > .changeShard_wrap > .inp_box > input {
  height: 97%;
  width: 300px;
  background-color: #F5F5F5;
  font-size: 20px;
  margin-left: 10px;
}

.changeShardBox > .changeShard_wrap > .shuoming {
  width: 330px;
  margin: auto;
  text-align: center;
  font-size: 15px;
  margin-top: 10px;
}

.changeShardBox > .changeShard_wrap > .shuoming input {
  width: 20px;
  height: 20px;
}

.changeShardBox > .changeShard_wrap > .shuoming a {
  color: #237aeb;
}

.changeShardBox > .changeShard_wrap > .shuoming > p:nth-child(1) {
  display: flex;
  align-items: center;
  justify-content: center;
}

.changeShardBox > .changeShard_wrap > .btn {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.changeShardBox > .changeShard_wrap > .btn button {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 15px 60px;
  font-size: 20px;
  text-transform: uppercase;
  border: 0;
  background-color: #096bce;
  border-radius: 12px;
  overflow: hidden;
  transition: 31ms cubic-bezier(0.5, 0.7, 0.4, 1);
  cursor: pointer;
}

.changeShardBox > .changeShard_wrap > .btn button:before {
  content: attr(alt);
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  inset: 0;
  font-size: 20px;
  font-weight: bold;
  color: white;
  letter-spacing: 4px;
  opacity: 1;
}

.changeShardBox > .changeShard_wrap > .btn button:active {
  box-shadow: none;
  transform: translateY(7px);
  transition: 35ms cubic-bezier(0.5, 0.7, 0.4, 1);
}

.changeShardBox > .changeShard_wrap > .btn button:hover:before {
  transition: all .0s;
  transform: translateY(100%);
  opacity: 0;
}

.changeShardBox > .changeShard_wrap > .btn button i {
  color: white;
  font-size: 20px;
  font-weight: bold;
  letter-spacing: 4px;
  font-style: normal;
  transition: all 2s ease;
  transform: translateY(-20px);
  opacity: 0;
}

.changeShardBox > .changeShard_wrap > .btn button:hover i {
  transition: all .2s ease;
  transform: translateY(0px);
  opacity: 1;
}

.changeShardBox > .changeShard_wrap > .btn button:hover i:nth-child(1) {
  transition-delay: 0.045s;
}

.changeShardBox > .changeShard_wrap > .btn button:hover i:nth-child(2) {
  transition-delay: calc(0.045s * 3);
}

.changeShardBox > .changeShard_wrap > .btn button:hover i:nth-child(3) {
  transition-delay: calc(0.045s * 4);
}

.changeShardBox > .changeShard_wrap > .btn button:hover i:nth-child(4) {
  transition-delay: calc(0.045s * 5);
}

@keyframes animations {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}