Define the styles for image。
Default style is defined in base.
img {
box-sizing: border-box;
/* Codes below is removed in v2.3, find more detail in issue #502 */
/* max-width: 100%;
height: auto;*/
vertical-align: middle;
border: 0;
}Max width has been removed in v2.3 to solve #502. New class .am-img-responsive is added.

<img src="https://amazeui.github.io/media/i/demos/bw-2014-06-19.jpg" class="am-img-responsive" alt=""/>Use following classes to give round cornor to <img>.
.am-radius Round Cornor.am-round Ellipse.am-circle Circle

<p>
<img class="am-radius" alt="140*140" src="https://amazeui.github.io/media/i/demos/bw-2014-06-19.jpg?imageView/1/w/1000/h/1000/q/80" width="140" height="140" />
<img class="am-round" alt="140*140" src="https://amazeui.github.io/media/i/demos/bw-2014-06-19.jpg?imageView/1/w/1000/h/600/q/80" width="200" height="120"/>
<img class="am-circle" src="https://amazeui.github.io/media/i/demos/bw-2014-06-19.jpg?imageView/1/w/1000/h/1000/q/80" width="140" height="140"/>
</p>.am-img-thumbnail Border

<img src="..." alt="..." class="am-img-thumbnail">
<img src="..." alt="..." class="am-img-thumbnail am-radius">
<img src="..." alt="..." class="am-img-thumbnail am-circle">