笔记

*{margin:0;padding:0;} div{ font-size:20px;/文本大小/ color:red;/文本颜色/ }

#box{ font-size:30px; }

.box{ font-size:40px; }

span{ font-size:20px; color:blue; }

.box1 span{ color:green; }

.con{ width:600px; height:400px; background:pink; }

.con1{ width:100px; height:100px; background:gold; float:left; /float:right;/ }

.con2{ width:120px; height:120px; background:yellowgreen; float:left; /float:right;/ } .con3{ width:130px; height:130px; background:skyblue; float:left; /float:right;/ }