html,
body {
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  background-color: #ebebeb;
}
div {
  box-sizing: border-box;
}
.app {
  overflow-y: auto;
  padding-bottom: 39px;
  width: 750px;
  height: 100%;
  margin: 0 auto;
  background-color: #fff;
}
.app .banner {
  background-size: 100% 100%;
  height: 568px;
  position: relative;
}
.app .banner .head_nav {
  padding: 0 30px;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.app .banner .head_nav .left .iconfont::before {
  font-size: 26px;
  color: #fff;
}
.app .banner .head_nav .center {
  height: 50px;
}
.app .banner .head_nav .center img {
  height: 100%;
}
.app .banner .head_nav .right {
  max-width: 120px;
  height: 42px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.app .banner .head_nav .right img {
  width: 42px;
}
.app .banner .head_nav .right a {
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  color: #fff;
  text-decoration: none;
  font-size: 16px;
}
.app .banner .parent_box {
  position: absolute;
  bottom: 17px;
  left: 50%;
  transform: translateX(-50%);
  width: 208px;
  height: 208px;
}
.app .banner .parent_box .white_Box {
  position: relative;
  z-index: 9;
  height: 100%;
  background: #FFFFFF;
  border-radius: 21px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.app .banner .parent_box .white_Box span {
  max-width: 100%;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  font-size: 75px;
  font-family: Arial;
  font-weight: bold;
  color: #EE3A49;
}
.app .banner .parent_box img {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  transform: translate(-12%, 40%);
}
.app .title {
  width: 601px;
  margin: 31px auto 0;
}
.app .title span {
  display: inline-block;
  width: 600px;
  text-align: center;
  font-size: 25px;
  font-family: PingFang SC;
  font-weight: bold;
  color: #414141;
  line-height: 33px;
}
.app .info {
  margin: 0 auto;
  width: 601px;
  margin-top: 53px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
}
.app .info span {
  max-width: 30%;
  font-size: 17px;
  font-family: PingFang SC;
  font-weight: 400;
  color: #414141;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.app .btn_box {
  margin-top: 100px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-size: 33px;
  font-family: PingFang SC;
  font-weight: bold;
}
.app .btn_box div {
  cursor: pointer;
  width: 522px;
  height: 83px;
  border: 1px solid #EE3A49;
  border-radius: 42px;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
}
.app .btn_box .download_btn {
  background: #EE3A49;
  color: #fff;
}
.app .btn_box .share_btn {
  margin-top: 44px;
  color: #EE3A49;
}
.app .back_index {
  margin-top: 77px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.app .back_index a {
  font-size: 25px;
  font-family: PingFang SC;
  font-weight: 400;
  text-decoration: underline;
  color: #A9A9A9;
}
.app .bottom_tip {
  margin-top: 418px;
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: center;
}
.app .bottom_tip span {
  font-size: 17px;
  font-family: PingFang SC;
  font-weight: 400;
  color: #A9A9A9;
}