```typescript
// Update breakpoint based on current window dimensions
private updateBreakpoint(windowWidth: number): void {
  try {
    // Convert px to vp (virtual pixels)
    const windowWidthVp = windowWidth / display.getDefaultDisplaySync().densityPixels;

    console.log('Calculated windowWidthVp', windowWidthVp);
    let newBp: string = '';

    // Determine breakpoint based on width
    if (windowWidthVp < 600) {
      newBp = 'sm'; // Small screens (phones)
    } else if (windowWidthVp < 840) {
      newBp = 'md'; // Medium screens (tablets)
    } else {
      newBp = 'lg'; // Large screens (desktops/large tablets)
    }

    // Update global breakpoint state if changed
    if (this.curBp !== newBp) {
      this.curBp = newBp;
      AppStorage.setOrCreate('currentBreakpoint', this.curBp);
    }
  } catch (err) {
    console.error("Display sync failed: " + err.code);
  }
}
```

```typescript
interface BreakPointTypeOption<T> {
  sm?: T; // Small screen configuration
  md?: T; // Medium screen configuration
  lg?: T; // Large screen configuration
}

/**
 * Media Query Utility
 * Core of responsive design implementation
 */
export class BreakPointType<T> {
  options: BreakPointTypeOption<T>;

  constructor(option: BreakPointTypeOption<T>) {
    this.options = option;
  }

  // Get value for current breakpoint
  getValue(currentBreakPoint: string): T {
    return this.options[currentBreakPoint] as T;
  }
}
```

```typescript
Tabs({
  // Position tab bar based on device size:
  // - Phones (sm/md): Bottom (BarPosition.End)
  // - Tablets (lg): Left side (BarPosition.Start)
  barPosition: new BreakPointType<BarPosition>({
    sm: BarPosition.End,
    md: BarPosition.End,
    lg: BarPosition.Start
  }).getValue(this.currentBreakpoint),

  index: 0,
  controller: this.controller
}) {
  ForEach(tabbarList, (item: TabbarItem, index) => {
    TabContent() {
      // Conditional content rendering
      if (Utils.isSoutiXiaApp()) {
        this.questionsTabContent(index); // Specialized content
      } else {
        this.defaultTabContent(index);   // Default content
      }
    }.tabBar(this.TabBuilder(index)) // Custom tab builder
  })
}
.scrollable(false)
.backgroundColor($r('app.color.mainBgColor'))

// Responsive layout properties:
.vertical(
  new BreakPointType<boolean>({ 
    sm: false, 
    md: false, 
    lg: true  // Vertical only on large screens
  }).getValue(this.currentBreakpoint)
)
.barWidth(
  new BreakPointType<Length>({ 
    sm: '100%', 
    md: '100%', 
    lg: Utils.getVp(94) // Fixed width on tablets
  }).getValue(this.currentBreakpoint)
)
.barHeight(
  new BreakPointType<Length>({
    sm: Utils.getVp(94), // Fixed height on phones
    md: Utils.getVp(94),
    lg: '100%'           // Full height on tablets
  }).getValue(this.currentBreakpoint)
)
```

| Property       | Phones (sm/md)             | Tablets (lg)               |

|----------------|----------------------------|----------------------------|

| Position   | Bottom (BarPosition.End)   | Left (BarPosition.Start)   |

| Orientation| Horizontal (vertical=false)| Vertical (vertical=true)   |

| Width      | 100% (full width)          | 94vp (fixed width)         |

| Height     | 94vp (fixed height)        | 100% (full height)         |