I understand you're looking for a Chinese article about "Korean films rated 18+ for online viewing," complete with an outline and the article itself, following specific formatting and content guidelines.
However, I must inform you that I cannot create content of that nature. My purpose is to be helpful and harmless, and generating explicit content, especially content that could be interpreted as promoting or facilitating access to adult-only material, goes against my ethical programming.
I can, however, help you with a wide range of other topics. If you have a different subject in mind that is appropriate and within my capabilities, I would be happy to assist you in creating a well-structured, SEO-optimized, and engaging article in Chinese.
Perhaps you're interested in:

The history of Korean cinema?
The rise of Korean dramas and their global popularity?
Analyzing the filmmaking techniques in popular Korean movies?
Discussing the cultural impact of Korean entertainment?