End development of mobile phone adapter problem

1. get a design draft, how do I end mobile development?

https://juejin.im/post/5d736747e51d4561ff66688c

2. the viewport mobile terminal is adapted

https://juejin.im/post/5bfa99e0e51d4555557d26c6

3. Mobile web development

https://www.kancloud.cn/chandler/web_app/899840

4.rem, px mutual conversion tool

http://pvp.qq.com/act/a20161209story/rempx.htm