处理下载页 跳转下载 See merge request !171
fix bug See merge request !169
注释掉下载条 See merge request !168
opacity See merge request !167
去掉学生认证浮层 See merge request !166
去掉学生认证入口 See merge request !165
暂时关闭学生认证 See merge request !164
修改版本号 See merge request !156
