媒体查询-常用查询语句

//定义一个变量和一个mixin@baseFontSize: 75;//基于视觉稿横屏尺寸/100得出的基准font-size
.px2rem(@name, @px){
    @{name}: @px / @baseFontSize * 1rem;
}
//使用示例：.container {
    .px2rem(height, 240);
}
//less翻译结果：
.container {
    height: 3.2rem;
}

判断设备横竖屏

/* 横屏 */
@media all and (orientation:landscape){
  html,body{position:relative;overflow:hidden;width:100%;height:100%;padding:0;margin:0;}
  html::before{content:"";position:fixed;top:0;left:0;height:100%;width:100%;background:#333;z-index:99999;}
  html::after{content:"\4E3A\4E86\66F4\597D\7684\4F53\9A8C\FF0C\8BF7\5C06\624B\673A\7AD6\8FC7\6765";text-align:center;font-size:16px;color:#fff;position:absolute;top:50%;left:0;height:30px;width:100%;margin-top:50px;z-index:99999;}
  body::before{content:"";position:absolute;z-index:99999;height:200px;width:100px;left:50%;top:50%;margin:-140px 0 0 -50px;color:#fff;background-image:url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAHQAAAB2CAYAAAAZUrcsAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAAyFpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuNS1jMDE0IDc5LjE1MTQ4MSwgMjAxMy8wMy8xMy0xMjowOToxNSAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOkRvY3VtZW50SUQ9InhtcC5kaWQ6MDAwMjcwNkVEQzczMTFFNjlFMDFGQTEzNkM3N0JBMTMiIHhtcE1NOkluc3RhbmNlSUQ9InhtcC5paWQ6MDAwMjcwNkREQzczMTFFNjlFMDFGQTEzNkM3N0JBMTMiIHhtcDpDcmVhdG9yVG9vbD0iQWRvYmUgUGhvdG9zaG9wIENDIChXaW5kb3dzKSI+IDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOjQ0NzhCMTlBREM1ODExRTZCNTdFRjQ0Q0I1QzRCODZBIiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjQ0NzhCMTlCREM1ODExRTZCNTdFRjQ0Q0I1QzRCODZBIi8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+J30rNQAACRRJREFUeNrsXQlsFVUUfW2hpexQlhYJi0IQJaCgoLgAsohIkFWIURQFNaBgBKMRgZAY1KgYlRIiQVkEo4IBEVAxBsQgyFIkLAHRgFCkgJhCgVqg33syd+R1nPb/+Z3fzpvek5y0s/6Ze+Zt9933XlIkElExIpN4HfF6YmviJWUGkonFxP3Eg8QjxL9VSJEUg6CNiD2Jw4mdiRnEBmwkI96RiJc8xdxCXEz8sSoKOpH4PLFlCN99PfE94ldVQVBkq9nEe1yO5RPPEFMMeccIp9LGxHSX4/P5wy306fc6EjsQtxF/DYKg/YnLOFu1AQEXEncwc4nVDBO0FbEr8V7iUMc5OcRBxGM+/B4SwniuY3xD/IH4GZfdFfC2JKjGbsSiSElkE5s7zjOdvYnfOt5zF7FmOe+bGXHHKeIyYqdEv5u+0Yx4UnuIAuLgkAnp5GyH4VeU836NiPOJOZHSsZTYuSIEXeX44b4hF9Pmy473Hu/DPWsR2xOnEX9xEfU8cSYxKVGCDnT84NgqIqbNFdq7nyM29Pn+Q4hfugi7ye/Uav+zWvuRrVVMTLAl8axmg2cT9DsjiHscoqJoG+anoK2JhdoP9K6CgoIzNBtsSeDvpBLfcUmtvuSKyMPHUGX3Q670HiK2J172UFG+kViXWMRNGjeX4UCP94zVA4SmwXKf2pBo0mzm9nUht8UT2dQYRlxArKfte5z4UXmbLdnaV/K+h6+hPnGR4ytbR2zhOK9vJLFo6lPKSSHu0+47vAJyhXbE3Y73GVeeeyazb9bGUQ/fAhwNo12cEp8Tq2v7EunEP++jT/mKI0W2qwA3wAHifQ6P0gfEXvHeEN6eJtr2iRiv6018QPPE4IGyiHU463qQuNTlujziVr4mOU6jw33Xg1gjAQb+R/s/tYI8WbnsYv2e2Jb3IVHc7DGB/SdolrZ9Lsbrumj/b2cR5xAn8L7OpQi62cXt5hVp3A3WIkFdbfrHU1GAy3EU8WcuwzPYx9w/HkGLHduxIE/7H4Z9kXh7Kcd1dGM/cXGcvmBUvGpzl17YsJM4hrv2FPucR2vbMVeK9HbRiBgL3wbEvFIqKReJbbRzeyWwQnSB2NjHSore+J9eSc2nL7RnyGVbe6oUxQP0+I906fkv5K/skLYvkd1s6dx8CRPGanZtRpziNcuNFxu4rHyE+/+OExcRd7nU5F7xsb9R/1AKPZT7puAMd7zP4O1xxLd5f8Ky3LAyCFmuXaSdiMcVmawEQQSy3Hna9uh4qumCYGEZ1+rtZuAtLuc8QVxJvEYEDR6clbuD3Ma3dbrfcbwp8Q128OTYbVavlaJO7KoqUuaEcSr2Kv3FX/35AD4fOkfQKTLE4a1DRGJ3/r+r45qP1VW3bYbd9vcqKFx+rxmaAvARrgmYoCncAhjD23i+h7hlAOixw8h2EbmI2OKniX20Y49xKvWc5RYZnKWdDWCukqSXfyzaRnU1fHa31ibN5ATYlJs1NuD3XRJvO1Q3SD67q4KMauySxN/LAXw+PNOTXF6+qZWN65Tl80aKRXxvPz52K6dguzcrl1OrL46Fnco9EDtoOK1KdhEGEW8R/+ByEWKlcvn5qLLG5PTTzmurXfeU0+FQHkFTDRCznkE1eQRjFxA/UVYEiGLP22ntHF3MBZyCpR0aYKzlbHWvts+tZwm+8oniWDADKE8HKGuUXGl4mHhBBDUHKE/vIq5yOTZLWVEfSgQ1C6gBDybO1vYh1U6NVq0XBBuTuQ09mWu1ZUJSqBmYqSzn/G4RNFyVJSWCVjGIoCKoQAQViKACEVTAguqiRgtaTjLwY0j28LxebBHYl9XnI0qLcr4+4qu+Ae8HUewBtRkxiFpX+7+miYLC9YeobIyFRBR6NE/ET8S5LGyOAe+Hd3pVWVEA6N2PFmW/UFldU7juOxMFjWXyRoEIKhBBBSKoIH5BEZyEWJfmXBO8LKarsEorKnKHldW5faS8giJ2BeM/7yDWEvtWKiAsIukRCfipV0ExAGYqp0pB8IDgawwIXheLoJi8N1tsFnhEWKt5ZQn6kjJ3MFJVBWKNZrsJivn4Vot9jMQAO/u1BUXNFbOBNRHbGImTylpTp8B2Vk8RMY0GtHvOTqGYmQsRZVk+3Rxj/uEQTxE7lwlMPYfBvoN9uh9GfrdBw7WHj2IqbvzuEL1itpVfwIDgrshy7/b5IWuKTpVmq54QtJXYNTRo4ZwAWWA2spJ9Lj8F/iGemcCbS9Rf8AB/QE/iTcRnlLdpeJJQy5UO0eAAU6RjurdNvL1PWU6fWTFeH5EUGiz8qYlpY6OXG4igwQJmCrvN2RTxcgMZwR0sIIgA8yqgBwUTN8KLNE0ENRvwyy7hWm51rxdLlhtcVI/nIhE0ZBBBQwYpQ4OHPdx8qcHt0obsZEgWQc3EJGWtg2YDy15i5tN0yXLDAU+ePBE0eHBOW5smgkotVyCCCkLTbPmNiZXzOogJzU2hGP2E9UUwHwMWK+2orMntD4oZzRMUVedByppU4oq2b72yhhoeFlOaJSgWe9lQyjGsWjBXTGmWoJuiHM8RU5olaLQV42WIvmGC3hnleDcxpVmCjlLWGEQ3oPkySUxplqA4bzlxgrICmTAmA3MEYi4GrCEiwdoGOhbQfTOHOF1Z/XWYvLGlmNBcQW00UTI42PgsVyCCCuKEcwpYLLwbcye3hKAEDzdwHQUd3YjN7eAl4YmgwcO7ypqA2V5mGsKmiaDmIl3FGBAmZahUigQiqEAEFYigAhFUBBUYKqhMshgepEDQi2KH0CAfgh4RO4QGxyFovtghNDgNQXf5fNNisWul2WofBPV7WcVLolOl2eprTFGO6VMwyVFHn266HzdWMhFyNFwg9ie29+l+CNbrbq8KMZS4QmxsNIYQV+rrtmCihl5iFyOxRlnr7pRYiAcB09v4r8AcHFPWGnUnnIICmAlyrSq50LoguMjjlLnd3uG2mB2ClBYTu4i9Ag0scI/lQH/Xd5a23CRiWl5Q1opLdcR2gcIZ4uvKGsXwP7dttAVhWxH7EEcqa0ar2ixwkpKpzRMN28aI0y0gHiAuZb/B0VIvinHJ5muVFR+ayZWmZCUeoUTDtvFxrvDsVdZkJWXiXwEGAB5thUjn4vqyAAAAAElFTkSuQmCC");background-repeat:no-repeat;background-position:center center;background-size:100px auto;-webkit-transform:rotateZ(-90deg);}
}

/* 竖屏 */
@media all and (orientation:portrait){
  html,body{position:relative;overflow:hidden;width:100%;height:100%;padding:0;margin:0;}
  html::before{content:"";position:fixed;top:0;left:0;height:100%;width:100%;background:#333;z-index:99999;}
  html::after{content:"\4E3A\4E86\66F4\597D\7684\4F53\9A8C\FF0C\8BF7\5C06\624B\673A\6A2A\8FC7\6765";position:absolute;top:50%;left:0;height:30px;width:100%;margin-top:30px;z-index:99999;text-align:center;font-size:16px;color:#fff;}
  body::before{content:"";position:absolute;z-index:99999;height:200px;width:100px;left:50%;top:50%;margin:-160px 0 0 -50px;color:#fff;background-image:url("data:image/png;base64,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");background-repeat:no-repeat;background-position:center center;background-size:100px auto;}
}

判断设备宽高

/* 设备宽度大于 320px 小于 640px */
@media all and (min-width:320px) and (max-width:640px) {
    
}

判断设备像素比

/* 设备像素比为 1 */
@media only screen and (-webkit-min-device-pixel-ratio: 1), only screen and (min-device-pixel-ratio: 1) {
    
}

/* 设备像素比为 1.5 */
@media only screen and (-webkit-min-device-pixel-ratio: 1.5), only screen and (min-device-pixel-ratio: 1.5) {
    
}

/* 设备像素比为 2 */
@media only screen and (-webkit-min-device-pixel-ratio: 2), only screen and (min-device-pixel-ratio: 2) {
    
}

常用设备设置

iPhones

/* ----------- iPhone 4 and 4S ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
}

/* Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 480px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) {

}

/* ----------- iPhone 5 and 5S ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) {
}

/* Landscape */
@media only screen 
  and (min-device-width: 320px) 
  and (max-device-width: 568px)
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) {

}

/* ----------- iPhone 6 ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2) { 

}

/* Portrait */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: portrait) { 

}

/* Landscape */
@media only screen 
  and (min-device-width: 375px) 
  and (max-device-width: 667px) 
  and (-webkit-min-device-pixel-ratio: 2)
  and (orientation: landscape) { 

}

/* ----------- iPhone 6+ ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 414px) 
  and (max-device-width: 736px) 
  and (-webkit-min-device-pixel-ratio: 3) { 

}

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

}

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

}

Galaxy Phones

/* ----------- Galaxy S3 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) {

}

/* Portrait */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 2) 
  and (orientation: landscape) {

}

/* ----------- Galaxy S4 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) {

}

/* Portrait */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 320px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: landscape) {

}

/* ----------- Galaxy S5 ----------- */

/* Portrait and Landscape */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) {

}

/* Portrait */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: portrait) {

}

/* Landscape */
@media screen 
  and (device-width: 360px) 
  and (device-height: 640px) 
  and (-webkit-device-pixel-ratio: 3) 
  and (orientation: landscape) {

}

iPad

/* ----------- iPad mini ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: portrait) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: landscape) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* ----------- iPad 1 and 2 ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: portrait) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: landscape) 
  and (-webkit-min-device-pixel-ratio: 1) {

}

/* ----------- iPad 3 and 4 ----------- */

/* Portrait and Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Portrait */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: portrait) 
  and (-webkit-min-device-pixel-ratio: 2) {

}

/* Landscape */
@media only screen 
  and (min-device-width: 768px) 
  and (max-device-width: 1024px) 
  and (orientation: landscape) 
  and (-webkit-min-device-pixel-ratio: 2) {

}

参考链接
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