iphone 6网站的响应度

我发现媒体查询存在问题，这会阻碍网站在iphone 6上的响应，尤其是iphone 6上的响应。有人能帮我解决这个问题吗，因为我无法在iphone 6上使其响应

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网站链接：www.buildwithcraft.co

网站链接：www.buildwithcraft.co

/*iPhone 6 Portrait*/
@media only screen and (min-device-width: 375px) and (max-device-width: 667px) and (orientation : portrait) {

}

/*iPhone 6 landscape*/
@media only screen and (min-device-width: 375px) and (max-device-width: 667px) and (orientation : landscape) {

}

/*iPhone 6+ Portrait*/
@media only screen and (min-device-width: 414px) and (max-device-width: 736px) and (orientation : portrait) {

}

/*iPhone 6+ landscape*/
@media only screen and (min-device-width: 414px) and (max-device-width: 736px) and (orientation : landscape) {

}

/*iPhone 6 and iPhone 6+ portrait and landscape*/
@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px) {
}

/*iPhone 6 and iPhone 6+ portrait*/
@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px) and (orientation : portrait) {

}

/*iPhone 6 and iPhone 6+ landscape*/
@media only screen and (max-device-width: 640px), only screen and (max-device-width: 667px), only screen and (max-width: 480px) and (orientation : landscape) {

}