8-- 椭圆样式按钮（跳转）

页面：

  <view class="page_hd">
    <navigator class="create" url="/pages/teacher/banji/add">创建班级</navigator>
    <navigator class="join" url="/pages/teacher/banji/join">加入班级</navigator>
  </view>

页面样式：

.page_hd {
  padding-top: 12px;
  height: 40px;
  display: flex;
  justify-content: space-between;
}

.create, .join {
  width: 75px;
  height: 28px;
  line-height: 28px;
  text-align: center;
  color: #fff;
  background-color: #1c9adc;
  font-size: 13px;
}

.create {
  margin-left: 15px;
  border-radius: 0 30px 30px 0;
}

.join {
  margin-right: 15px;
  border-radius: 30px 0 0 30px;
}