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This website is built in accordance with web accessibility design principles. The main content is divided into three major sections:：
1.Top Function Area: Includes links such as Home, Site Map, Site Search, and Font Size Adjustment.
2.Main Content Area: Contains the primary content of the page.
3.Bottom Function Area: Contains additional links and information.。

Accesskey Settings：

Alt + U: Top function area (includes Home, Site Map, Site Search, etc.)
Alt + C: Main content area (the primary area of each page)
Alt + Z: Bottom function area

Note:
If you are using Firefox, the access keys must be used with Shift + Alt + [Accesskey letter].
For example, pressing Shift + Alt + C will jump to the main content area of the page.

Keyboard Navigation Tips for Tabbed Interfaces:
If you are unable to click on tab items with a mouse, you can navigate using the following keyboard operations:
← / → or ↑ / ↓: Use the left/right or up/down arrow keys to move between tabs.
Home / End: Jump directly to the first or last tab.
Tab: After focusing on a tab, press the Tab key to move to the tab content and browse the data.
If radio buttons are present, use ← / → or ↑ / ↓ to move between options.
Shift + Tab: Move backward to the previous item.
When returning to the tab list, continue using ← / → or ↑ / ↓ to switch between tabs.