const coversupport = 'css' in window && typeof css.supports === 'function' && (css.supports('top: env(a)') || css.supports('top: constant(a)'))
document.write('<meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0' + (coversupport ? ', viewport-fit=cover' : '') + '" />')


const displaymodechangeevent = document.createevent('event')
displaymodechangeevent.initevent('displaymodechange', false, false)


function resizeevent() {
    const clientwidth = document.documentelement.clientwidth
    let scale = 1
    const displaymode = window.displaymode
    if (clientwidth > 960) {
        scale = math.max(1280, clientwidth) / 1920
        window.ismobile = false
        window.ispc = true
        window.displaymode = 'pc'
    } else {
        scale = clientwidth / 750
        window.ismobile = true
        window.ispc = false
        window.displaymode = 'mobile'
    }

    window.$$pagescale = scale
    document.documentelement.style.fontsize = (scale * 100).tofixed(3) + 'px'
    if (displaymode !== window.displaymode) {
        document.dispatchevent(displaymodechangeevent)
    }
}
document.addeventlistener('domcontentloaded', function () {
    resizeevent()
})
window.addeventlistener('resize', function () {
    resizeevent()
})

resizeevent()