メディア クエリを使用して Web サイトを iPhone 6 および iPhone 6 Plus 用に最適化するにはどうすればよいですか?

@media only screen 
    and (min-device-width : 375px) // or 213.4375em or 3in or 9cm
    and (max-device-width : 667px) // or 41.6875em
    and (width : 667px) // or 41.6875em
    and (height : 375px) // or 23.4375em
    and (orientation : landscape) 
    and (color : 8)
    and (device-aspect-ratio : 375/667)
    and (aspect-ratio : 667/375)
    and (device-pixel-ratio : 2)
    and (-webkit-min-device-pixel-ratio : 2)
{ }

@media only screen 
    and (min-device-width : 375px) // or 213.4375em
    and (max-device-width : 667px) // or 41.6875em
    and (width : 375px) // or 23.4375em
    and (height : 559px) // or 34.9375em
    and (orientation : portrait) 
    and (color : 8)
    and (device-aspect-ratio : 375/667)
    and (aspect-ratio : 375/559)
    and (device-pixel-ratio : 2)
    and (-webkit-min-device-pixel-ratio : 2)
{ }

@media only screen 
    and (min-device-width : 414px) 
    and (max-device-width : 736px) 
    and (orientation : landscape) 
    and (-webkit-min-device-pixel-ratio : 3) 
{ }

@media only screen 
    and (min-device-width : 414px) 
    and (max-device-width : 736px)
    and (device-width : 414px)
    and (device-height : 736px)
    and (orientation : portrait) 
    and (-webkit-min-device-pixel-ratio : 3) 
    and (-webkit-device-pixel-ratio : 3)
{ }

@media only screen 
    and (max-device-width: 640px), 
    only screen and (max-device-width: 667px), 
    only screen and (max-width: 480px)
{ }

@media screen 
    and (min-device-width : 1080px) 
    and (max-device-width : 1920px) 
    and (min-resolution: 401dpi) 
    and (device-aspect-ratio:16/9) 
{ }

@media screen 
    and (min-device-width : 750px) 
    and (max-device-width : 1334px) 
    and (min-resolution: 326dpi) 
{ }

@media (!small) and (damn-small), (omfg) { }

@media 
    (max-device-width:42mm) 
    and (min-device-width:38mm) 
{ }