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

html, body {
  width: 100%;
  height: 100%;
}

:root {
  --content-width: 1160px;
}
.banner {
  width: 100%;
  min-width: var(--content-width);
  height: auto;
}
.header{
  position: absolute;
  top: 8px;
  left: 50%;
  width: var(--content-width);
  transform: translateX(-50%);
}
.header-wrap{
  position: relative;
  width: 100%;
  height: 80px;
  background: #fff;
}
.header-wrap .header{
  top: 50%;
  transform: translate(-50%, -50%);
}
.header-wrap .header li.active::after{
  background: #E50000;
}
.header .logo {
  width: 220px;
}
.header .nav{
  float: right;
  margin-top: 12px;
  list-style: none;
}
.header.header-white li, .header.header-white a{
  color: #2B2F36;
}
.header li{
  position: relative;
  display: inline-block;
  margin-left: 50px;
  font-size: 18px;
  font-weight: 500;
  line-height: 25px;
  color: #fff;
  cursor: pointer;
}
.header a{
  text-decoration: none;
  color: #fff;
}
.header li.active::after{
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  border-radius: 100px;
  width: 20px;
  height: 5px;
  background: #fff;
  transform: translateX(-50%);
}

/** content */
@media screen and (max-width: 1440px) {
  .hualala-content {
    padding-top: 134px;
    padding-bottom: 120px;
  }
}

@media screen and (min-width: 1441px) {
  .hualala-content {
    padding-top: 196px;
    padding-bottom: 186px;
  }
}

.hualala-content {
  width: 100%;
  max-width: 1056px;
  margin: auto;
}

.hualala-content img {
  display: block;
  width: 100%;
}

/** footer */
.hualala-footer {
  width: 100%;
  background-color: #333333;
}

.hualala-footer__inner {
  width: 100%;
  max-width: 1300px;
  height: 140px;
  margin: auto;
  padding: 0 86px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo img {
  display: block;
  height: 20px;
}

.footer-items {
  list-style: none;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.footer-items li {
  font-size: 12px;
  font-family: PingFangSC-Regular, PingFang SC;
  font-weight: 400;
  color: #7D7D7D;
  line-height: 20px;
  margin-left: 28px;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
}

.footer-items li a {
  color: inherit;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-items li a:hover {
  color: #f1f1f1;
}

.footer-items li .badge-icon {
  width: 18px;
  height: 20px;
  margin-right: 9px;
  vertical-align: middle;
  line-height: 0;
  font-size: 0;
}
.footer-items li.price-desc, .footer-items li.teacher-desc{
  cursor: pointer;
}
.footer-items li.price-desc:hover, .footer-items li.teacher-desc:hover{
  color: #d6d6d6;
}
.overlay{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
}
.overlay .img-price-desc, .overlay .img-teacher-desc{
  position: absolute;
  top: 50%;
  left: 50%;
  height: 80%;
  transform: translate(-50%, -50%);
}
.overlay .img-teacher-desc{
  height: 98%;
}
section{
  padding: 100px 0;
  text-align: center;
}
.section-title{
  font-size: 38px;
  font-weight: bold;
  color: #2b2f36;
}
.sub-title{
  margin-bottom: 80px;
  font-size: 20px;
  color: #9fA3aa;
}
section.advantage img{
  width: 340px;
  border-radius: 10px;
  box-shadow: rgba(106, 112, 124, .07) -1px -1px 12px ;
}
section.advantage img + img{
  margin-left: 70px;
}
section.safe{
  background: #F8F9FB;
}
section.safe img{
  margin-bottom: 24px;
  width: 180px;
}
.safe-item{
  position: relative;
  display: inline-block;
  margin-bottom: 3em;
  font-size: 18px;
  line-height: 25px;
  color: #9fa3aa;
}
.safe-item h5{
  margin-bottom: 6px;
  font-size: 22px;
  line-height: 30px;
  font-weight: 500;
  color: #2b2f36;
}
.safe-item .desc{
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translate(-50%, 100%);
  white-space: nowrap;
}
.safe-item + .safe-item{
  margin-left: 230px;
}
.content-download{
  padding: 100px 0 80px;
  text-align: center;
  background: #F8F9FB;
}
.downloads{
  margin: 60px 0 calc(140px + 1em);
}
.download-title{
  margin-bottom: 20px;
  font-size: 40px;
  font-weight: bold;
  line-height: 56px;
  color: #2B2F36;
}
.download-sub-title{
  font-size: 20px;
  color: #6A707C;
}
.downloads li{
  position: relative;
  display: inline-block;
  box-shadow: 1px 2px 20px 0px rgba(106, 112, 124, 0.07);
  border-radius: 12px;
  width: 150px;
  height: 150px;
  background: #fff;
  cursor: pointer;
}
.downloads li + li{
  margin-left: 144px;
}
.windows:hover, .mac:hover{
  background: #FFD700;
}
.windows:hover img, .mac:hover img{
  content: url('./images/icon-download.png');
}
.windows:hover::before, .mac:hover::before{
  content: '点击下载';
}
.android:hover img, .ios:hover img{
  content: url('./images/download-qrcode.png');
  width: 100%;
}
.android:hover::before, .ios:hover::before{
  content: '扫码下载';
}
.downloads li img{
  position: absolute;
  top: 50%;
  left: 50%;
  width: 50px;
  transform: translate(-50%, -50%);
}
.android:not(:hover)::after, .ios:not(:hover)::after{
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 58px;
  height: 58px;
  background: url('./images/icon-corner.png') no-repeat center center / cover;
}
.downloads li::before{
  content: attr(data-text);
  position: absolute;
  bottom: 0;
  left: 50%;
  font-size: 16px;
  white-space: nowrap;
  color: #9FA3AA;
  transform: translate(-50%, calc(100% + 20px));
}
.download-pic{
  width: 1215px;
}
.form-invoice{
  display: none;
  position: absolute;
  top: 36%;
  left: 50%;
  width: 592px;
  background: #FFFFFF;
  box-shadow: 0px 12px 48px 16px rgba(0, 0, 0, 0.03), 0px 9px 28px 0px rgba(0, 0, 0, 0.05), 0px 6px 16px -8px rgba(0, 0, 0, 0.08);
  border-radius: 6px;
  transform: translate(-50%, -50%);
}
.icon-close{
  position: absolute;
  top: 20px;
  right: 24px;
  width: 16px;
  cursor: pointer;
}
.form-invoice ul{
  margin: 32px 0 96px;
}
.form-invoice li{
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 14px;
  color: #303133;
}
.form-invoice input{
  padding: 0 12px;
  width: 282px;
  height: 32px;
  background: #FFFFFF;
  border-radius: 4px;
  border: 1px solid #D7D9DC;
}
.form-invoice input::placeholder{
  color: #C0C3C9;
}
.form-invoice .form-title{
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  padding: 0 24px;
  height: 56px;
  line-height: 56px;
  font-size: 16px;
  font-weight: bold;
  color: #303133;
}
.form-footer{
  display: flex;
  align-items: center;
  justify-content: right;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  padding: 0 24px;
  height: 52px;
}
.form-footer button{
  width: 65px;
  height: 32px;
  background: #FFFFFF;
  border-radius: 16px;
  border: 1px solid #D9D9D9;
  font-size: 14px;
  color: #606266;
  cursor: pointer;
}
button.btn-comfirm{
  margin-left: 12px;
  color: #fff;
  background: #E50000;
}
.price-section{
  text-align: center;
}
.price-section li{
  display: flex;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 22px;
  font-weight: bold;
  color: #2B2F36;
}
.price-section .head{
  margin-right: 48px;
  border-radius: 100px 0px 0px 100px;
  width: 590px;
  height: 72px;
  line-height: 72px;
  text-align: center;
}
.price-section .tail{
  box-shadow: inset 0px 1px 3px 0px rgba(255, 255, 255, 0.5);
  border-radius: 0px 100px 100px 34px;
  width: 275px;
  height: 72px;
  line-height: 72px;
  text-align: center;
  color: #fff;
}
.toast{
  position: fixed;
  top: 50%;
  left: 50%;
  border-radius: 12px;
  padding: 12px 24px;
  color: #000;
  background: rgba(247, 215, 205, 0.89);
  z-index: 100;
}
/* 下载问号弹窗*/
.download-doubt {
  position: relative;
  top: 6px;
  left: 4px;
  width: 24px;
  cursor: pointer;
}
.doubt-mask {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.3);
}
.doubt-popup {
  display: none;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  padding: 32px 0;
  width: 700px;
  height: 700px;
  background: #FFFFFF;
  border-radius: 12px;
}
.doubt-popup-content {
  padding: 0 40px;
  height: 560px;
  overflow-y: auto;
}
.doubt-popup-content::-webkit-scrollbar-thumb {
  border-radius: 10px;
  background-color: #C4C6CA;
}
.doubt-popup-content::-webkit-scrollbar-track {
  background-color: #fff;
}
.doubt-popup-content::-webkit-scrollbar {
  width: 10px;
  background-color: #fff;
}
.doubt-popup-title {
  text-align: center;
  font-size: 24px;
  font-weight: bold;
  color: #2B2F36;
  line-height: 33px;
}
.doubt-popup-subtitle {
  margin-top: 4px;
  margin-bottom: 24px;
  text-align: center;
  font-size: 16px;
  font-weight: 400;
  color: #6A707C;
  line-height: 22px;
}
.doubt-popup-content-title {
  position: relative;
  padding-left: 15px;
  font-size: 18px;
  font-weight: 500;
  color: #2B2F36;
  line-height: 25px;
}
.doubt-popup-content-title::before {
  position: absolute;
  top: 2px;
  left: 0;
  content: '';
  width: 5px;
  height: 20px;
  background: #FFD700;
  border-radius: 100px;
}
.doubt-popup-item {
  margin-top: 14px;
  margin-bottom: 8px;
  padding: 16px;
  background: #F8F9FB;
  border-radius: 0px 12px 12px 12px;
}
.doubt-popup-item-title {
  margin-bottom: 6px;
  font-size: 16px;
  font-family: PingFangSC-Regular, PingFang SC;
  color: #2B2F36;
  line-height: 22px;
}
.doubt-popup-item-text {
  margin-top: 4px;
  font-size: 16px;
  font-family: PingFangSC-Regular, PingFang SC;;
  color: #6A707C;
  line-height: 22px;
}
.doubt-popup .mt-16 {
  margin-top: 16px;
}
.doubt-popup-close {
  position: fixed;
  top: 20px;
  right: 24px;
  width: 24px;
  height: 21px;
  cursor: pointer;
}
.doubt-popup-item-text-stars {
  padding-left: 10px;
  font-size: 16px;
  font-weight: 500;
  color: #2B2F36;
}
/* 下载问号弹窗*/