摘要： <!DOCTYPE HTML><html><head> <title> The family tree</title> <style type="text/css"> *{margin:0;padding:0; } .tree ul{ padding-top:20px; position:relative; transition:all 0.5s; -webkit-transition:all 0.5s; -moz-transition:all 0.5s; } .tree li{ float:left; 阅读全文