Responsive设计在现代Web设计中可谓是越来越流行，但很同学们并未理解其真正的设计概念，往往把Responsive视为一种自适应布局。当然有很多同学也在尝试动写Responsive的案例，但如何取其断点左右纠结，如何设置哪几个断点？又从何入手？
Responsive中的断点都依赖于CSS3的Media Queries来决断。曾在CSS3 Media Queries模板、使用em单位创建CSS3的Media Queries和iPads和iPones的Media Queries有过这方面的介绍。今天特意根据一些Responsive框架整理了一些常见的Media Queries片段，以供大家参考：
CSS3 Media Queries片段
在这里主要分成三类：移动端、PC端以及一些常见的响应式框架的Media Queries片段。
移动端Media Queries片段
iPhone5
@media screen and (device-aspect-ratio: 40/71) {}
或者：
@media screen and (device- 320px) and (device-height: 568px) and (-webkit-device-pixel-ratio: 2){}
iPhone 5 In Portrait & Landscape
@media only screen
and (min-device-width : 320px)
and (max-device-width : 568px){
// CSS Style
}
iPhone 5 In Landscape
@media only screen
and (min-device-width : 320px)
and (max-device-width : 568px)
and (orientation : landscape){
// CSS Style
}
iPhone 5 In Portrait
@media only screen
and (min-device-width : 320px)
and (max-device-width : 568px)
and (orientation : portrait){
// CSS Style
}
iPone4
@media only screen and (-webkit-min-device-pixel-ratio : 1.5), only screen and (min-device-pixel-ratio : 1.5) {}
iPhone 3G
@media screen and (device- 320px) and (device-height: 480px) and (-webkit-device-pixel-ratio: 1){}
iPhone
/*Landscape*/
@media screen and (max-device- 480px) {}
/*Portrait*/
@media screen and (max-device- 320px) {}
Blackberry Torch
@media screen and (max-device- 480px) {}
Samsung S3
@media only screen and (-webkit-device-pixel-ratio: 2) {}
Google Nexus 7
@media screen and (device- 600px) and (device-height: 905px) and (-webkit-min-device-pixel-ratio: 1.331) and (-webkit-max-device-pixel-ratio: 1.332) {}
Samsung Galaxy S3
@media only screen and (-webkit-device-pixel-ratio: 2) {}
Samsung Galaxy S2
@media screen and (device- 320px) and (device-height: 533px) and (-webkit-device-pixel-ratio: 1.5) {}
Galaxy Tab 10.1
/*Landscape*/
@media (max-device- 1280px) and (orientation: landscape) {}
/*Portrait*/
@media (max-device- 800px) and (orientation: portrait) {}
iPad In Portrait & Landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px){
// CSS Styles
}
iPad In Landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape){
// CSS Styles
}
iPad In Portrait
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait){
// CSS Styles
}
Retina iPad In Portrait & Landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (-webkit-min-device-pixel-ratio: 2){
// CSS Styles
}
Retina iPad in landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape)
and (-webkit-min-device-pixel-ratio: 2){
// CSS Styles
}
Retina iPad in portrait
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait)
and (-webkit-min-device-pixel-ratio: 2){
// CSS Styles
}
iPad Mini In Portrait & Landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (-webkit-min-device-pixel-ratio: 1){
// CSS Style
}
iPad Mini In Landscape
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : landscape)
and (-webkit-min-device-pixel-ratio: 1){
// CSS Style
}
iPad Mini In Portrait
@media only screen
and (min-device-width : 768px)
and (max-device-width : 1024px)
and (orientation : portrait)
and (-webkit-min-device-pixel-ratio: 1) {
// CSS Style
}
桌面端
320px
@media screen and (max- 320px) {}
640px
@media screen and (max- 640px) {}
800px
@media screen and (max- 800px) {}
1024px
@media screen and (max- 1024px) {}
1028px
@media screen and (max- 1028px) {}
除了上面的常见Media Queries片段之外，下面的网站还提供了一些其他的片段：
框架Media Queries片段
Boilerplate
/*URL:http://html5boilerplate.com/*/
/* Smartphones (portrait and landscape) ----------- */
@media only screen
and (min-width : 320px)
and (max-width : 480px) {
/* Styles */
}
/* Smartphones (landscape) ----------- */
@media only screen
and (min-width : 321px) {
/* Styles */
}
/* Smartphones (portrait) ----------- */
@media only screen
and (max-width : 320px) {
/* Styles */
}
/* iPads (portrait and landscape) ----------- */
@media only screen
and (min-width : 768px)
and (max-width : 1024px) {
/* Styles */
}
/* iPads (landscape) ----------- */
@media only screen
and (min-width : 768px)
and (max-width : 1024px)
and (orientation : landscape) {
/* Styles */
}
/* iPads (portrait) ----------- */
@media only screen
and (min-width : 768px)
and (max-width : 1024px)
and (orientation : portrait) {
/* Styles */
}
/* Desktops and laptops ----------- */
@media only screen
and (min-width : 1224px) {
/* Styles */
}
/* Large screens ----------- */
@media only screen
and (min-width : 1824px) {
/* Styles */
}
/* iPhone 4 ----------- */
@media
only screen and (-webkit-min-device-pixel-ratio : 1.5),
only screen and (min-device-pixel-ratio : 1.5) {
/* Styles */
}
Bootstrap的Media Queries
/*URL:http://twitter.github.com/bootstrap*/
/* Large desktop */
@media (min- 1200px) { ... }
/* Portrait tablet to landscape and desktop */
@media (min- 768px) and (max- 979px) { ... }
/* Landscape phone to portrait tablet */
@media (max- 767px) { ... }
/* Landscape phones and down */
@media (max- 480px) { ... }
Foundation的Media Queries
/*URL:http://foundation.zurb.com/*/
/* We use this media query to add styles to any device that supports media queries */
@media only screen { }
/* Used to alter styles for screens at least 768px wide. This is where the grid changes. */
@media only screen and (min- 768px) {}
/* Used to alter styles for screens at least 1280px wide. */
@media only screen and (min- 1280px) {}
/* Used to alter styles for screens at least 1440px wide. */
@media only screen and (min- 1440px) {}
/* Apply styles to screens in landscape orientation */
@media only screen and (orientation: landscape) {}
/* Apply styles to screens in portrait orientation */
@media only screen and (orientation: portrait) {}
Skeleton的Media Queries
/*URL:http://www.getskeleton.com*/
/* Smaller than standard 960 (devices and browsers) */
@media only screen and (max- 959px) {}
/* Tablet Portrait size to standard 960 (devices and browsers) */
@media only screen and (min- 768px) and (max- 959px) {}
/* All Mobile Sizes (devices and browser) */
@media only screen and (max- 767px) {}
/* Mobile Landscape Size to Tablet Portrait (devices and browsers) */
@media only screen and (min- 480px) and (max- 767px) {}
/* Mobile Portrait Size to Mobile Landscape Size (devices and browsers) */
@media only screen and (max- 479px) {}
FRAMELESS的Media Queries
/*URL:http://framelessgrid.com/*/
@media screen and (max- 16.875em){}
@media screen and (min- 32.5em) and (max- 37.4375em),
screen and (min- 45em) and (max- 56.9375em),
screen and (min- 77.5em) and (max- 102.4375em),
screen and (min- 135em){}
@media screen and (min- 102.5em) and (max- 117.9375em),
screen and (min- 150em){}
@media screen and (min- 15em){}
@media screen and (min- 30em){}
@media screen and (min- 37.5em){}
@media screen and (min- 57em){}
@media screen and (min- 57em) and (max- 117.9375em){}
@media screen and (min- 118em){}
Susy的Media Queries
/*URL:http://susy.oddbird.net/*/
@media (min- 29em) {}
@media (min- 30em) and (max- 60em) {}
@media (min- 119em) {}
@media (min- 33.75em) and (max- 67.5em) {}
@media (min- 33.75em) and (max- 67.5em) {}
Less Framework 4
/*URL:http://lessframework.com/*/
@media only screen and (min- 768px) and (max- 991px) {}
/* Mobile Layout: 320px (20em). */
@media only screen and (max- 767px) {}
/*Wide Mobile Layout: 480px (30em)*/
@media only screen and (min- 480px) and (max- 767px) {}
Golden Grid System的Media Queries
/*URL:http://goldengridsystem.com/*/
/* @media screen and (min- 640px) */
@media screen and (min- 40em) {}
/* @media screen and (min- 720px) */
@media screen and (min- 45em) {}
/* @media screen and (min- 888px) */
@media screen and (min- 55.5em) {}
/* @media screen and (min- 984px) */
@media screen and (min- 61.5em) {}
/* @media screen and (min- 1200px) */
@media screen and (min- 75em) {}
/* @media screen and (min- 1392px) */
@media screen and (min- 87em) {}
/* @media screen and (min- 1680px) */
@media screen and (min- 105em) {}
/* @media screen and (min- 1872px) */
@media screen and (min- 117em) {}
/* @media screen and (min- 2080px) */
@media screen and (min- 130em) {}
Fluid baseline的Media Queries
/*URL:http://fluidbaselinegrid.com/*/
/* MOBILE PORTRAIT */
@media only screen and (min- 320px) {}
/* MOBILE LANDSCAPE */
@media only screen and (min- 480px) {}
/* SMALL TABLET */
@media only screen and (min- 600px) {}
/* TABLET/NETBOOK */
@media only screen and (min- 768px) {}
/* LANDSCAPE TABLET/NETBOOK/LAPTOP */
@media only screen and (min- 1024px) {}
@media only screen and (min- 1280px) {}
/* WIDESCREEN */
/* Increased body size for legibility */
@media only screen and (min- 1400px) {}
320andUP
/*URL:http://stuffandnonsense.co.uk/projects/320andup*/
@media only screen and (min- 480px) {
/* 480 */
}
@media only screen and (min- 600px) {
/* 600 */
}
@media only screen and (min- 768px) {
/* 768*/
}
@media only screen and (min- 992px) {
/* 992*/
}
@media only screen and (min- 1382px) {
/* 1382 */
}
@media only screen and (-webkit-min-device-pixel-ratio: 1.5),
only screen and (min--moz-device-pixel-ratio: 1.5),
only screen and (min-device-pixel-ratio: 1.5) {
/* 2x*/
}
Gridless
/* URL:http://thatcoolguy.github.com/gridless-boilerplate/ */
@media only screen and (min- 480px) {
/* Wide mobile (480px+) styles go here */
}
@media only screen and (min- 768px) {
/* Tablets/netbooks (768px+) styles go here */
}
@media only screen and (min- 1024px) {
/* Desktops (1024px+) styles go here */
}
TotanTHEMES
/*URL:http://titanthemes.com/*/
/* Smaller than standard 960 (devices and browsers) */
@media only screen and (max- 959px) {}
/* Tablet Portrait size to standard 960 (devices and browsers) */
@media only screen and (min- 768px) and (max- 989px) {}
/* All Mobile Sizes (devices and browser) */
@media only screen and (max- 767px) {}
/* Mobile Landscape Size to Tablet Portrait (devices and browsers) */
@media only screen and (min- 480px) and (max- 767px) {}
/* Mobile Portrait Size to Mobile Landscape Size (devices and browsers) */
@media only screen and (max- 479px) {}
Responsive Grid System
/*URL:http://responsive.gs/*/
@media (max- 480px) {}
@media (min- 480px) and (max- 768px) {}
@media (min- 768px) {}
@media (min- 1024px) {}
@media (min- 1200px) {}
本文搜集的是Media Queries在各种设备下的代码片段，希望这些片段能帮大家更好的理解Responsive断点的设置。如果大家有更好的方案，希望能在评论中分享。
2014年04月19日更新
基于视窗宽度的媒体查询断点设置
前提设置body的字体为100%。其具有一个简单的计算公式：100% = 16px = 1em = 14pt
/*Viewport = 1920px*/
@media screen and (max- 120em){
}
/*Viewport = 1680px*/
@media screen and (max- 105em){
}
/*Viewport = 1400px*/
@media screen and (max- 87.5em){
}
/*Viewport = 1200px*/
@media screen and (max- 75em){
}
/*Viewport = 1024px*/
@media screen and (max- 64em){
}
/*Viewport = 960px*/
@media screen and (max- 60em){
}
/*Viewport = 800px*/
@media screen and (max-width : 50em){
}
/*Viewport = 768px*/
@media screen and (max-width : 48em){
}
/*Viewport = 600px*/
@media screen and (max- 37.5em){
}
/*Viewport = 480px*/
@media screen and (max- 30em){
}
/*Viewport = 320px*/
@media screen and (max- 20em){
}
/*Viewport = 240px*/
@media screen and (max- 15em){
}
/*
High Resolution/Retina Display Media Queries
*/
/*Pixel Density 3*/
@media(-webkit-min-device-pixel-ratio: 3),(min-resolution: 192dpi){
}
/*Pixel Density 2*/
@media(-webkit-min-device-pixel-ratio: 2),(min-resolution: 192dpi){
}
/*Pixel Density 1.5*/
@media(-webkit-min-device-pixel-ratio: 1.5),(min-resolution: 124.8dpi){
}
/*Pixel Density 1.25*/
@media(-webkit-min-device-pixel-ratio: 1.25),(min-resolution: 120dpi){
}
/*
Printed Style Media Queries
*/
/*Print Resolution 300 dpi*/
@media print and (min-resolution: 300dpi){
}
/*Print Resolution 144 dpi*/
@media print and (min-resolution:144dpi){
}
/*Print Resolution 96 dpi*/
@media print and (min-resolution:96dpi){
}
/*Print Resolution 72 dpi*/
@media print and (resolution:72dpi){
}