qq_我在呢_0
可以参考下面这种需要用两个DIV，一个开启的一个关闭的<<<<<<html>>>>>> <div id="div1" class="open1"> <div id="div2" class="open2"></div> </div><<<<<<css>>>>>>#div1{ width: 170px; height: 100px; border-radius: 50px; position: relative; } #div2{ width: 96px; height: 96px; border-radius: 48px; position: absolute; background: white; box-shadow: 0px 2px 4px rgba(0,0,0,0.4); } .open1{ background: rgba(0,184,0,0.8); } .open2{ top: 2px; right: 1px; } .close1{ background: rgba(255,255,255,0.4); border:3px solid rgba(0,0,0,0.15); border-left: transparent; } .close2{ left: 0px; top: 0px; border:2px solid rgba(0,0,0,0.1);}<<<<<<js>>>>>>window.onload=function(){ var div2=document.getElementById("div2"); var div1=document.getElementById("div1"); div2.onclick=function(){ div1.className=(div1.className=="close1")?"open1":"close1"; div2.className=(div2.className=="close2")?"open2":"close2"; } }