【Optimize】Footer copyright information layout

【Add】The function of obtaining download address by extracting code

【Optimize】The url rule configuration of nginx reduces security risks

【Fix】ajax paging request, page number calculation error

【Fix】mysql5.6 version 5.6 model field modification error, modify the SQL statement in Upfield function to be compatible with 5.6+

【Add】special field name of "class" in the model drop-down menu, and the default call subcategory is list item

【Optimize】The menu at the top of the mobile phone is scrolled and hidden to expand the reading range of the content

【Update】Simplify official website style and enrich footer content

【Add】Operation Support of Secondary Domain of Master Station