Based on the provided HTML text, it is difficult to determine the exact content and purpose of the website. However, some key aspects can be identified:
The website seems to focus on "Zweiradsicherheit," which translates to "Two-Wheeler Safety" in English. This could imply that the website might provide information, resources, or services related to promoting safety for two-wheeled vehicles such as bicycles or motorcycles.
It mentions a specific institute ("Institut") related to two-wheeler safety. This might indicate that the site belongs to an organization dedicated to researching, analyzing, and implementing measures concerning two-wheeler safety.
Additionally, there are CSS properties being set for various elements on different screen sizes (media queries), which suggests that the website is designed or optimized for responsiveness across multiple devices.
Furthermore, several style-related properties like borders, padding, background color are mentioned throughout the HTML code snippet.
Overall though, without additional context or more comprehensive content from the webpage's HTML source code, it is challenging to provide a precise summary of what this particular website is about.
