/**
 * 屏幕尺寸工具函数
 */
export interface ScreenInfo {
    width: number;
    height: number;
    availWidth: number;
    availHeight: number;
    pixelRatio: number;
    orientation: 'portrait' | 'landscape';
}
/**
 * 获取屏幕信息
 */
export declare function getScreenInfo(): ScreenInfo;
/**
 * 获取视口信息
 */
export declare function getViewportInfo(): {
    width: number;
    height: number;
    clientWidth: number;
    clientHeight: number;
};
/**
 * 获取设备像素比
 */
export declare function getDevicePixelRatio(): number;
/**
 * 检测是否为移动设备
 */
export declare function isMobileDevice(): boolean;
/**
 * 检测是否为高分辨率屏幕
 */
export declare function isHighDPIScreen(): boolean;