sinat_39338823的博客

.before:before{ content: 'before追加内容'; display:block; color: red; } .after:after{ content: 'after追加内容'; display:block; color:blue; } <div class="before after"> div 自...

兼容 div{ width:100px; transition: width 2s; -moz-transition: width 2s; /* Firefox 4 */ -webkit-transition: width 2s; /* Safari 和 Chrome */ -o-transition: width 2s; /* Opera */ } Internet Explorer 10、F...

css字体加粗font-weight