.nav-bar {
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 9999;
  color: #fff;
  background: #C7DDFF;
}
.nav-bar .view {
  width: 100%;
  color: #2D2D2D;
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nav-bar .view .selectGrade {
  position: absolute;
  left: 22rpx;
  width: 158rpx;
  height: 48rpx;
  line-height: 48rpx;
  border-radius: 25rpx;
  background-color: #ffffffa6;
  color: #333;
  font-size: 24rpx;
  text-align: center;
}
.nav-bar .view .title {
  text-align: center;
}
.headerBg {
  z-index: -1;
  position: absolute;
  left: 0px;
  width: 100%;
  height: 210rpx;
  background: url(https://reader-wx.ai160.com/images/reader/v3/navbarBg.png) no-repeat;
  background-size: 100% 100%;
  background-position: center;
}
.gradeContainer {
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 9999;
}
.gradeContainer .gradeBox {
  width: 520rpx;
  padding: 33rpx 40rpx 50rpx;
  border-radius: 20rpx;
  background-color: white;
}
.gradeContainer .gradeBox .title {
  text-align: center;
  font-size: 40rpx;
  font-weight: bold;
}
.gradeContainer .gradeBox .content {
  margin-top: 55rpx;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.gradeContainer .gradeBox .content .grade {
  padding: 12rpx 64rpx;
  border-radius: 50rpx;
  font-size: 36rpx;
  color: #333;
  background-color: #E4E4E4;
}
.gradeContainer .gradeBox .content .oneRow {
  width: 100%;
  text-align: center;
}
.gradeContainer .gradeBox .content .check {
  color: white;
  background-color: #1CCC69;
}
.gradeContainer .gradeBox .submitBox {
  text-align: center;
}
.gradeContainer .gradeBox .submitBox .submit {
  width: 360rpx;
  margin-top: 60rpx;
  padding: 14rpx 0rpx;
  display: inline-block;
  background-color: #45B7FF;
  color: white;
  font-size: 42rpx;
  border-radius: 50rpx;
}