*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
}

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}
.container {
  background: #EDF2FF;
  padding-bottom: 130px;
}
.container .header {
  width: 100%;
  height: 600px;
  background-image: url(/image/bakActivity/xfTeacherAc/header_bg.png);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.container .firstScreen{
  display: flex;
  align-items: center;
  flex-direction: column;
}
.container .firstScreen .lun{
  margin-top: -80px;
  width: 1200px;
  height: 480px;
}
.container .firstScreen .section{
  display: flex;
  align-items: center;
  flex-direction: column;
}
.container .firstScreen .section .section-title {
  width: 360px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border-radius: 60px;
  opacity: 1;
  background: #FFE45A;
  font-size: 30px;
  font-weight: bold;
  color: #4A230B;
  margin-top: 60px;
}
.container .firstScreen .section .section-p {
  margin-top: 26px;
  line-height: 1;
  font-size: 20px;
  color: #222222;
  text-align: center;
}
.container .firstScreen .section .grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 40px;
}
.container .firstScreen .section .box {
  width: 580px;
  height: 410px;
  border-radius: 20px;
  background: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}
.container .firstScreen .section .box.left {
  transform: translateX(-80px);
}
.container .firstScreen .section .box.right {
  transform: translateX(80px);
}
.container .firstScreen .section .box.show {
  opacity: 1;
  transform: translateX(0);
}
.container .firstScreen .section .img-wrap {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px 0;
  background: linear-gradient(180deg, #ffffff 0%, #e7f7ff 100%);
}
.container .firstScreen .section .img-wrap img{
  width: 505px;
  height: 225px;
}
.container .firstScreen .section h1{
  font-size: 24px;
  font-weight: bold;
  color: #0065E1;
  margin-top: 20px;
}
.container .firstScreen .section p{
  width: 520px;
  font-size: 16px;
  color: #222222;
  margin-top: 12px;
  line-height: 30px;
}
.container .center {
  width: 100%;
  height: 600px;
  background-image: url(/image/bakActivity/xfTeacherAc/center_bg.png);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 70px;
}
.container .secondScreen{
  display: flex;
  align-items: center;
  flex-direction: column;
}
.container .secondScreen .section{
  display: flex;
  align-items: center;
  flex-direction: column;
}
.container .secondScreen .section .section-title {
  width: 360px;
  height: 50px;
  line-height: 50px;
  text-align: center;
  border-radius: 60px;
  opacity: 1;
  background: #FFE45A;
  font-size: 30px;
  font-weight: bold;
  color: #4A230B;
  margin-top: 60px;
}
.container .secondScreen .section .section-p {
  margin-top: 26px;
  line-height: 1;
  font-size: 20px;
  color: #222222;
  text-align: center;
}
.container .secondScreen .section .grid {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin-top: 40px;
}
.container .secondScreen .section .box {
  width: 1200px;
  height: 220px;
  border-radius: 20px;
  background: linear-gradient(90deg, #eaf7ff 0%, #f4faff 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  margin-bottom: 30px;
}
.container .secondScreen .section .box.left {
  transform: translateX(-80px);
}
.container .secondScreen .section .box.right {
  transform: translateX(80px);
}
.container .secondScreen .section .box.show {
  opacity: 1;
  transform: translateX(0);
}
.container .secondScreen .section .flex {
  display: flex;
  height: 100%;
  align-items: flex-end;
}
.container .secondScreen .section .flex-col {
  display: flex;
  flex-direction: column;
  margin-left: 125px;
}
.container .secondScreen .section .flex img:nth-child(1)  {
  margin-left: 80px;
}
.container .secondScreen .section .flex img{
  width: 148px;
  height: 185px;
  margin-left: 40px;
}
.container .secondScreen .section .flex-col h1 {
  font-size: 26px;
  font-weight: bold;
  color: #0065E1;
}

.container .secondScreen .section .flex-col p {
  font-size: 18px;
  color: #222222;
  margin-top: 18px;
}
.container .bottom {
  width: 100%;
  height: 600px;
  background-image: url(/image/bakActivity/xfTeacherAc/bottom_bg.png);
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  margin-top: 70px;
}
.container .openApp {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.container .openApp h1{
  font-size: 32px;
  font-weight: bold;
  color: #151A6F;
  margin-top: 80px;
  margin-bottom: 30px;
}
.container .openApp p{
  font-size: 18px;
  color: #151A6F;
}
.button{
  position: fixed;
  bottom: 30px;
  left: calc(50vw - 600px);
  width: 1200px;
  height: 60px;
  border-radius: 30px;
  display: flex;
  flex-direction: column;
  justify-content: space-evenly;
  align-items: center;
  background: linear-gradient(180deg, #ffa060 4%, #ff6c2e 93%);
  margin-top: 80px;
  cursor: pointer;
  user-select: none;
}
.button p:nth-child(1){
  font-size: 18px;
  font-weight: bold;
  color: #FFFFFF;
}
.button p:nth-child(2){
  font-size: 14px;
  color: #FFFFFF;
}

.container .fadeIn {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.container .fadeIn.show {
  opacity: 1;
  transform: translateY(0);
}

.toWX {
  display: none;
  position: fixed;
  z-index: 3;
  top: calc(50vh - 200px);
  left: calc(50vw - 200px);
  width: 400px;
  height: 400px;
  border-radius: 20px;
  background: linear-gradient(180deg, #FFF2D0 0%, #FFF2D0 50%, #ffffff);
  flex-direction: column;
  justify-content: center;
  align-items: center;
  user-select: none;
}
.toWX h1{
  color: #333;
  font-size: 22px;
  font-weight: bold;
}
.toWX>img {
  width: 180px;
  height: 180px;
  margin: 35px 0 15px;
}
.toWX p{
  font-size: 16px;
  color: #333;
  text-align: center;
}
.toWX .close{
  position: absolute;
  top: 20px;
  right: 20px;
}
.toWX .close img{
  width: 16px;
  height: 16px;
}
.modal {
  display: none;
  width: 100%;
  height: 100%;
  position: fixed;
  top: 0px;
  left: 0px;
  background: black;
  opacity: 0.4;
  z-index: 2;
}