响应式布局设备分界点
http://v3.bootcss.com/css/#overview-doctype
Bootstrap
/* 超小屏幕(手机,小于 768px) */ /* 没有任何媒体查询相关的代码,因为这在 Bootstrap 中是默认的(还记得 Bootstrap 是移动设备优先的吗?) */ /* 小屏幕(平板,大于等于 768px) */ @media (min-width: @screen-sm-min) { ... } /* 中等屏幕(桌面显示器,大于等于 992px) */ @media (min-width: @screen-md-min) { ... } /* 大屏幕(大桌面显示器,大于等于 1200px) */ @media (min-width: @screen-lg-min) { ... }
我们偶尔也会在媒体查询代码中包含max-width
从而将 CSS 的影响限制在更小范围的屏幕大小之内
@media (max-width: @screen-xs-max) { ... }
@media (min-width: @screen-sm-min) and (max-width: @screen-sm-max) { ... }
@media (min-width: @screen-md-min) and (max-width: @screen-md-max) { ... }
@media (min-width: @screen-lg-min) { ... }
@media (min-width:480px) and (max-width: 767px)
@media (min-width:768px) and (max-width: 992px)
@media (max-width: 479px)
@media all and (-webkit-min-device-pixel-ratio: 2), all and (-moz-min-device-pixel-ratio: 1.5), all and (min-device-pixel-ratio: 2), all and (-o-min-device-pixel-ratio: 2/1)
@media (max-width: 479px) and (-webkit-min-device-pixel-ratio: 2), all and (-moz-min-device-pixel-ratio: 1.5), all and (min-device-pixel-ratio: 2), all and (-o-min-device-pixel-ratio: 2/1)