<h2>响应式判断</h2>

<p class="example">操作浏览器窗口，查看效果。</p>

.example {

    padding: 20px;

    color: white;

}

/* Extra small devices (phones, 600px and down) */

@media only screen and (max-width: 600px) {

    .example {background: red;}

}

​

/* Small devices (portrait tablets and large phones, 600px and up) */

@media only screen and (min-width: 600px) {

    .example {background: green;}

}

​

/* Medium devices (landscape tablets, 768px and up) */

@media only screen and (min-width: 768px) {

    .example {background: blue;}

} 

​

/* Large devices (laptops/desktops, 992px and up) */

@media only screen and (min-width: 992px) {

    .example {background: orange;}

} 

​

/* Extra large devices (large laptops and desktops, 1200px and up) */

@media only screen and (min-width: 1200px) {

    .example {background: pink;}

}