* {
  padding: 0;
  margin: 0;
}
html,
body {
  width: 100%;
  min-height: 100%;
  background: #f8f8f8;
  scroll-behavior: smooth;
}
img,
input {
  width: 100%;
  height: 100%;
}
input {
  background: none;
  outline: none;
  border: none;
}
ol,
ul {
  list-style: none;
}
button {
  outline: none;
  cursor: pointer;
  margin: 0 10px;
  padding: 5px 15px;
  border: 0;
  border-radius: 2px;
}
a {
  color: initial;
  text-decoration: none;
}
.page {
  width: 100%;
}
.page .head-box {
  padding: 0 20px;
  background: #76b5a4;
}
.page .head-box .menu-box {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: space-between;
  -ms-flex-pack: space-between;
  justify-content: space-between;
}
.page .head-box .menu-box .menu-region {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .head-box .menu-box .menu-region .menu {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.page .head-box .menu-box .menu-region .menu a {
  font-size: 20px;
  margin-right: 20px;
  color: #fff;
  font-weight: 400;
}
.page .head-box .menu-box .menu-region .button {
  margin-left: 15px;
  padding: 10px 25px;
  border: 1px solid #fff;
  color: #fff;
  border-radius: 5px;
}
.page .head-box .menu-box .menu-region .student {
  background: #fa8a00;
  border-color: #fa8a00;
}
.page .head-box .head-intro {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .head-box .head-intro .img {
  width: 50%;
  max-width: 500px;
  padding-right: 10%;
  -ms-flex-negative: 0;
  flex-shrink: 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.page .head-box .head-intro .img img {
  width: 100%;
  height: initial;
}
.page .head-box .head-intro .intro {
  -webkit-box-flex: 1;
  -ms-flex-positive: 1;
  flex-grow: 1;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.page .head-box .head-intro .intro .title {
  font-size: 40px;
  font-weight: 500;
  color: #fff;
}
.page .head-box .head-intro .intro .content {
  margin: 30px 0;
  color: #fff;
  font-size: 18px;
  line-height: 30px;
}
.page .head-box .head-intro .intro .content p {
  position: relative;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
}
.page .head-box .head-intro .intro .content p img {
  width: 30px;
  height: 30px;
  padding-right: 5px;
}
.page .head-box .head-intro .intro .operating {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .head-box .head-intro .intro .operating .button {
  margin-right: 15px;
  padding: 10px 25px;
  border: 1px solid #fff;
  color: #fff;
  border-radius: 5px;
}
.page .head-box .head-intro .intro .operating .student {
  background: #fa8a00;
  border-color: #fa8a00;
  -webkit-box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}
@media (max-width: 700px) {
  .page .head-box .menu-box .login {
    display: none;
  }
  .page .head-box .head-intro {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .page .head-box .head-intro .img {
    width: 100%;
    padding-right: 0;
  }
  .page .head-box .head-intro .intro {
    width: 100%;
  }
}
.page .superiority-box {
  padding: 100px 20px;
  background: #f9fbfa;
}
.page .superiority-box .base {
  max-width: 1000px;
  margin: 0 auto;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .superiority-box .base > .title {
  position: relative;
  padding: 30px 50px 30px 0;
  width: 30%;
  font-size: 50px;
  font-weight: 500;
  color: #333;
  white-space: pre-wrap;
}
.page .superiority-box .base > .title::after {
  content: '';
  width: 50px;
  height: 5px;
  background: #76b5a4;
  position: absolute;
  top: 0;
  right: initial;
  bottom: initial;
  left: 0;
}
.page .superiority-box .base .box {
  width: calc(70% - 50px);
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -ms-flex-wrap: wrap;
  flex-wrap: wrap;
  -webkit-box-align: flex-start;
  -ms-flex-align: flex-start;
  align-items: flex-start;
}
.page .superiority-box .base .box .item {
  width: 50%;
  margin-bottom: 40px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .superiority-box .base .box .item:nth-last-child(-n+2) {
  margin-bottom: 0;
}
.page .superiority-box .base .box .item .icon {
  width: 50px;
  height: 50px;
  background: #fff;
  -ms-flex-negative: 0;
  flex-shrink: 0;
  border-radius: 50%;
  -webkit-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}
.page .superiority-box .base .box .item .icon img {
  width: 50%;
  height: 50%;
  margin: 25%;
}
.page .superiority-box .base .box .item .text {
  padding: 0 20px;
  -webkit-box-flex: 1;
  -ms-flex-positive: 1;
  flex-grow: 1;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.page .superiority-box .base .box .item .text .title {
  font-size: 18px;
}
.page .superiority-box .base .box .item .text .content {
  margin-top: 10px;
  color: #888;
  font-size: 13px;
}
@media (max-width: 700px) {
  .page .superiority-box .base {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .page .superiority-box .base > .title {
    width: 100%;
  }
  .page .superiority-box .base .box {
    width: 100%;
  }
}
.page .subscribers-box {
  padding: 100px 20px;
  background: #fff;
}
.page .subscribers-box .base {
  max-width: 1000px;
  margin: 0 auto;
}
.page .subscribers-box .base .title {
  position: relative;
  padding: 30px 0;
  text-align: center;
  font-size: 40px;
  color: #333;
}
.page .subscribers-box .base .title::after {
  content: '';
  width: 50px;
  height: 5px;
  background: #76b5a4;
  margin-left: -25px;
  position: absolute;
  top: 0;
  right: initial;
  bottom: initial;
  left: 50%;
}
.page .subscribers-box .base .content {
  text-align: center;
  margin: 0 auto;
}
.page .subscribers-box .base .content .statistics {
  margin: 20px 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.page .subscribers-box .base .content .statistics div {
  margin: 0 10px;
  padding: 10px 30px;
  font-size: 20px;
  font-weight: 500;
  border: 2px solid #e3e3e3;
  border-radius: 5px;
}
.page .subscribers-box .base .content .statistics .student {
  border-color: #fa8a00;
  color: #fa8a00;
}
.page .subscribers-box .base .content .statistics .teacher {
  border-color: #76b5a4;
  color: #76b5a4;
}
.page .subscribers-box .base .content .explanation {
  margin-top: 30px;
  color: #777;
}
.page .function-box {
  padding: 100px 20px;
  background: #f9fbfa;
}
.page .function-box .base {
  max-width: 1000px;
  margin: 0 auto;
}
.page .function-box .base > .title {
  position: relative;
  padding: 30px 0;
  text-align: center;
  font-size: 40px;
  color: #333;
}
.page .function-box .base > .title::after {
  content: '';
  width: 50px;
  height: 5px;
  background: #76b5a4;
  margin-left: -25px;
  position: absolute;
  top: 0;
  right: initial;
  bottom: initial;
  left: 50%;
}
.page .function-box .base .box {
  width: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .function-box .base .box .option {
  width: 50%;
}
.page .function-box .base .box .option .item {
  width: 100%;
  padding: 20px 0;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
}
.page .function-box .base .box .option .item:nth-last-child(-n+2) {
  margin-bottom: 0;
}
.page .function-box .base .box .option .item .icon {
  width: 50px;
  height: 50px;
  background: #fff;
  -ms-flex-negative: 0;
  flex-shrink: 0;
  border-radius: 50%;
  -webkit-box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
}
.page .function-box .base .box .option .item .icon img {
  width: 50%;
  height: 50%;
  margin: 25%;
}
.page .function-box .base .box .option .item .text {
  padding: 0 20px;
  -webkit-box-flex: 1;
  -ms-flex-positive: 1;
  flex-grow: 1;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.page .function-box .base .box .option .item .text .title {
  font-size: 18px;
}
.page .function-box .base .box .option .item .text .content {
  margin-top: 10px;
  color: #888;
  font-size: 13px;
}
.page .function-box .base .box .img-box {
  width: calc(50% - 30px);
  margin-left: 30px;
  background-size: contain;
  background-position: center;
  background-repeat: no-repeat;
}
@media (max-width: 700px) {
  .page .function-box .base .box {
    -ms-flex-wrap: wrap;
    flex-wrap: wrap;
  }
  .page .function-box .base .box .option {
    width: 100%;
  }
  .page .function-box .base .box .img-box {
    width: 100%;
    height: 300px;
    margin: 30px 0 0;
  }
}
.page .free-box {
  padding: 50px 20px;
  background: #76b5a4;
}
.page .free-box .title {
  font-size: 40px;
  color: #fff;
  text-align: center;
}
.page .free-box .signup {
  margin-top: 30px;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
}
.page .free-box .signup a {
  margin: 0 10px;
  padding: 10px 30px;
  font-size: 20px;
  font-weight: 500;
  border: 1px solid #fff;
  color: #fff;
  border-radius: 5px;
}
.page .free-box .signup .student {
  border-color: #fa8a00;
  background: #fa8a00;
}