Please read “Installing SEA via WordPress” first.
Use FTP client
Please download to install an FTP client such as FileZilla.
Upload the files

Please upload the folder “sea-theme” to your themes directory.
Active SEA theme
After uploading the files, login to your WordPress admin.Please go to “Appearance > Themes”. Click “Activate” for the theme “SEA”.

Return to the original article to read more about other steps(install plugin, import demo)