fill in item page

Signed-off-by: Takashiro <takashiro@qq.com>
add 3d model button and video button

Signed-off-by: Takashiro <takashiro@qq.com>
add media page

Signed-off-by: Takashiro <takashiro@qq.com>
data of sample activities

Signed-off-by: Takashiro <takashiro@qq.com>
activity list

Signed-off-by: Takashiro <takashiro@qq.com>